Secondary carrier configuration method, unit, system, electronic device, and storage medium

Abstract

The present disclosure provides a secondary carrier configuration method, a unit, a system, an electronic device, and a storage medium. The method is applicable to a primary distributed unit in a primary base station corresponding to a user equipment (UE), and comprises: on the basis of a secondary cell pre-establishment list information element in a UE context modification request, determining secondary carriers to be aggregated; on the basis of a carrier aggregation coordination relationship of secondary distributed units corresponding to the secondary carriers to be aggregated, sending a secondary carrier establishment request to the secondary distributed units, wherein the secondary carrier establishment request comprises a mobility restriction list information element in the UE context modification request; and determining a UE context modification response message on the basis of a secondary carrier establishment success response message corresponding to the secondary carrier establishment request, so that the secondary carriers to be aggregated are configured for the UE on the basis of the UE context modification response message. The method implements direct communication between the primary distributed unit and the secondary distributed units, achieves quick addition of cross-station secondary carriers to the UE, and significantly improves the data information transmission efficiency.

Description

Configuration method, unit, system, electronic device and storage medium of auxiliary carrier

[0001] Cross-references to related publications

[0002] This disclosure claims priority to a Chinese patent application filed with the State Intellectual Property Office on December 8, 2023, with application number CN202311682888.7 and invention name “Configuration method, unit, system, electronic device and storage medium for auxiliary carrier”. The entire contents of the application are incorporated by reference in this disclosure. Technical Field

[0003] The embodiments of the present disclosure relate to, but are not limited to, the field of communication technologies, and in particular to a configuration method, unit, system, electronic device, and storage medium for an auxiliary carrier. Background Art

[0004] The carrier wave refers to the frequency of the electromagnetic waves used by base stations to transmit information. During signal transmission, the signal isn't transmitted directly; instead, it's loaded onto a wave with a fixed frequency. This process is called loading, and the fixed frequency is called the carrier frequency. In other words, a lower signal frequency is modulated onto a higher frequency. This higher frequency is called the carrier frequency, also known as the baseband.

[0005] Carrier aggregation (CA) is a technology that increases bandwidth by combining multiple independent carrier channels to achieve higher data rates and capacity. There are three types of carrier aggregation: intra-band contiguous, intra-band non-contiguous, and inter-band non-contiguous, with increasing complexity. During operator network deployment, coverage capabilities vary across frequency bands, and some terminals are often covered by carriers from different sites simultaneously. From the perspective of carrier aggregation, there is a need to add cross-site secondary carriers. Summary of the Invention

[0006] The present disclosure provides a method, unit, system, electronic device, and storage medium for configuring a secondary carrier, so as to improve the configuration efficiency of cross-site secondary carriers.

[0007] In a first aspect, an embodiment of the present disclosure provides a method for configuring a secondary carrier, which is applicable to a main distribution unit DU included in a main base station corresponding to a user equipment UE, and the method includes: determining the secondary carrier to be aggregated according to a secondary cell pre-establishment list information element in a UE context modification request; sending a secondary carrier establishment request to the secondary distribution unit based on the carrier aggregation coordination relationship of the secondary distribution unit corresponding to the secondary carrier to be aggregated, wherein the secondary carrier establishment request includes a mobility restriction list information element in a UE context modification request; determining a UE context modification response message based on a secondary carrier establishment success response message corresponding to the secondary carrier establishment request, so that the secondary carrier to be aggregated is configured for the user equipment UE based on the UE context modification response message.

[0008] In the second aspect, an embodiment of the present disclosure provides a method for configuring a secondary carrier, which is applicable to a secondary distribution unit, and the method includes: receiving a secondary carrier establishment request containing a mobility restriction list information element sent by a main distribution unit; generating a secondary carrier establishment success response message according to the mobility restriction list information element in the secondary carrier establishment request, and returning the secondary carrier establishment success response message to the main distribution unit, so that the main distribution unit obtains a UE context modification response message based on the secondary carrier establishment success response message, and configures the secondary carrier to be aggregated for the user equipment UE based on the UE context modification response message.

[0009] In a third aspect, an embodiment of the present disclosure provides a method for configuring a secondary carrier, which is applicable to a main centralized unit included in a main base station corresponding to a user equipment UE, and the method includes: sending a UE context modification request message to a main distribution unit included in the main base station; wherein the UE context modification request message includes a secondary cell pre-established list information element and a mobility restriction list information element; receiving a UE context modification response message returned by the main distribution unit, and configuring the secondary carrier to be aggregated for the user equipment UE according to the UE context modification response message; wherein the UE context modification response message is generated by the above method.

[0010] In a fourth aspect, an embodiment of the present disclosure provides a main distribution unit, which includes: a determination module, configured to determine the secondary carrier to be aggregated according to the secondary cell pre-establishment list information element in the UE context modification request; a sending module, configured to send a secondary carrier establishment request to the secondary distribution unit based on the carrier aggregation coordination relationship of the secondary distribution unit corresponding to the secondary carrier to be aggregated, wherein the secondary carrier establishment request includes the mobility restriction list information element in the UE context modification request; a configuration module, configured to determine the UE context modification response message based on the secondary carrier establishment success response message corresponding to the secondary carrier establishment request, so as to configure the secondary carrier to be aggregated for the user equipment UE based on the UE context modification response message.

[0011] In a fifth aspect, an embodiment of the present disclosure provides a secondary distribution unit, comprising: a receiving module, configured to receive a secondary carrier establishment request containing a mobility restriction list information element sent by a main distribution unit; a response module, configured to generate a secondary carrier establishment success response message according to the mobility restriction list information element in the secondary carrier establishment request, and return the secondary carrier establishment success response message to the main distribution unit, so that the main distribution unit obtains a UE context modification response message based on the secondary carrier establishment success response message, so as to configure the secondary carrier to be aggregated for the user equipment UE based on the UE context modification response message.

[0012] In the sixth aspect, an embodiment of the present disclosure provides a main centralized unit, which includes: a sending module, configured to send a UE context modification request message to a main distribution unit included in the main base station; wherein the UE context modification request message includes a secondary cell pre-established list information element and a mobility restriction list information element; a receiving module, configured to receive a UE context modification response message returned by the main distribution unit, and configure the secondary carrier to be aggregated for the user equipment UE according to the UE context modification response message; wherein the UE context modification response message is generated by the above method.

[0013] In a seventh aspect, an embodiment of the present disclosure provides a secondary carrier configuration system, comprising: the main distribution unit provided in the fourth aspect, the secondary distribution unit provided in the fifth aspect, and the main centralized unit provided in the sixth aspect.

[0014] In an eighth aspect, an embodiment of the present disclosure provides an electronic device, comprising a memory and a processor; the memory stores a computer program that can be executed by the processor, and when the computer program is executed by the processor, the configuration method of the auxiliary carrier provided in any of the above aspects is implemented.

[0015] In a ninth aspect, an embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method for configuring the auxiliary carrier provided in any of the above aspects is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the accompanying drawings of the embodiments of the present disclosure:

[0017] FIG1 shows a flow chart of a method for configuring a secondary carrier of a primary distribution unit included in a primary base station corresponding to a user equipment UE;

[0018] FIG2 shows a schematic flow chart of a configuration method for a secondary carrier applicable to a secondary distributed unit;

[0019] FIG3 shows a schematic flow chart of a method for configuring a secondary carrier of a primary centralized unit included in a primary base station corresponding to a user equipment UE;

[0020] FIG4 is a flowchart of a method for configuring a secondary carrier according to an embodiment of the present disclosure;

[0021] FIG5 shows a schematic diagram of the process of modifying the secondary carrier on the main distribution unit side;

[0022] FIG6 shows a schematic diagram of the process of forwarding uplink control information on the main distribution unit side;

[0023] FIG7 is a flowchart of another method for configuring a secondary carrier according to an embodiment of the present disclosure;

[0024] FIG8 shows a schematic diagram of the process of sending a secondary carrier establishment success response message;

[0025] FIG9 shows a schematic diagram of the process of modifying the secondary carrier on the secondary distribution unit side;

[0026] FIG10 is a schematic diagram showing a forwarding process of uplink control information on the secondary distribution unit side;

[0027] FIG11 is a flowchart of another method for configuring a secondary carrier according to an embodiment of the present disclosure;

[0028] FIG12 is a block diagram of a main distribution unit provided in an embodiment of the present disclosure;

[0029] FIG13 is a block diagram of a composition of an auxiliary distribution unit provided in an embodiment of the present disclosure;

[0030] FIG14 is a block diagram of a main centralized unit provided in an embodiment of the present disclosure;

[0031] FIG15 is a block diagram of a secondary carrier configuration system provided by an embodiment of the present disclosure;

[0032] FIG16 is a block diagram of an electronic device according to an embodiment of the present disclosure;

[0033] FIG17 is a schematic diagram of downlink traffic splitting of a cross-site auxiliary carrier provided by a specific example of the present disclosure;

[0034] FIG18 is a schematic diagram of establishing a collaborative link provided by a specific example of the present disclosure;

[0035] FIG19 is a schematic diagram of a MAC layer downlink data AN feedback message flow provided by a base station deployment according to a specific example of the present disclosure;

[0036] FIG20 is a flowchart of a cross-site secondary carrier establishment configuration process provided by a specific example of the present disclosure. DETAILED DESCRIPTION

[0037] To enable those skilled in the art to better understand the technical solution of the present disclosure, a configuration method, unit, system, electronic device, and storage medium for an auxiliary carrier provided by an embodiment of the present disclosure are described in detail below with reference to the accompanying drawings.

[0038] The present disclosure will be described more fully hereinafter with reference to the accompanying drawings, but the illustrated embodiments may be embodied in different forms, and the present disclosure should not be construed as limited to the embodiments set forth below. Rather, these embodiments are provided so that the present disclosure will be thorough and complete and will fully understand the scope of the present disclosure to those skilled in the art.

[0039] The accompanying drawings of the embodiments of the present disclosure are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the detailed embodiments, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing the detailed embodiments with reference to the accompanying drawings.

[0040] The present disclosure may be described with reference to plan views and / or cross-sectional views by way of ideal schematic views of the present disclosure. Therefore, the exemplary illustrations may be modified according to manufacturing techniques and / or tolerances.

[0041] In the absence of conflict, the various embodiments of the present disclosure and the various features therein may be combined with each other.

[0042] The terms used in this disclosure are only used to describe specific embodiments and are not intended to limit the disclosure. As used in this disclosure, the term "and / or" includes any and all combinations of one or more related enumerated items. As used in this disclosure, the singular forms "a" and "the" are also intended to include plural forms, unless the context clearly indicates otherwise. As used in this disclosure, the terms "comprising" and "made of" specify the presence of the features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof.

[0043] Unless otherwise defined, all terms (including technical and scientific terms) used in this disclosure have the same meanings as those commonly understood by those skilled in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this disclosure, and will not be interpreted as having an idealized or overly formal meaning unless expressly defined in this disclosure.

[0044] The present disclosure is not limited to the embodiments shown in the drawings, but includes modifications of the configurations formed based on the manufacturing process. Therefore, the regions illustrated in the drawings have schematic properties, and the shapes of the regions shown in the drawings illustrate the specific shapes of the regions of the elements, but are not intended to be limiting.

[0045] One embodiment of the present disclosure provides a method for configuring a secondary carrier, applicable to a primary distributed unit (DU) included in a primary base station corresponding to a user equipment (UE). FIG1 shows a flowchart of the method for configuring a secondary carrier for a primary distributed unit (DU) included in a primary base station corresponding to a user equipment (UE). As shown in FIG1 , the method includes the following steps S110 to S130:

[0046] Step S110: Determine the secondary carrier to be aggregated according to the secondary cell pre-established list information element in the UE context modification request.

[0047] The UE context modification request may be sent by a primary centralized unit included in the primary base station. Accordingly, a primary distributed unit (DU) included in the primary base station receives the UE context modification request message sent by the primary centralized unit included in the primary base station and obtains the secondary cell pre-established list information element included in the UE context modification request message.

[0048] The timing for the master centralized unit in the master base station to send a UE context modification request may be: when a UE accesses the master base station and needs to add a secondary carrier, the master centralized unit CU in the master base station may send a UE context modification request message to the master distributed unit DU in the master base station. The UE context modification request message carries the necessary information required for secondary carrier configuration, so that the master distributed unit DU can implement subsequent secondary carrier configuration procedures based on the information carried in the UE context modification request message. For example, the UE context modification request message carries a secondary cell pre-established list information element.

[0049] The secondary cell pre-established list information element includes relevant information of the secondary carriers to be aggregated. Therefore, the primary distribution unit DU can determine the secondary carriers to be aggregated according to the secondary cell pre-established list information element.

[0050] Step S120: Based on the carrier aggregation coordination relationship between the secondary distribution units corresponding to the secondary carriers to be aggregated, a secondary carrier establishment request is sent to the secondary distribution unit, where the secondary carrier establishment request includes the mobility restriction list information element in the UE context modification request.

[0051] A carrier aggregation coordination relationship (CA coordination relationship) refers to the collaborative working relationship between different carriers in carrier aggregation. In CA, it is necessary to ensure that each carrier can operate in coordination to achieve higher data rates and network performance. Accordingly, based on the carrier aggregation coordination relationship of the secondary distribution unit corresponding to the secondary carrier to be aggregated, if a CA coordination relationship is determined between the primary distribution unit DU and the secondary distribution unit DU, a secondary carrier establishment request is sent to the secondary distribution unit.

[0052] The secondary distribution units corresponding to the secondary carriers to be aggregated can be directly determined based on the pre-configured carrier aggregation coordination relationship. Since the carrier aggregation coordination relationship records the mapping relationship between the secondary carriers and their corresponding secondary distribution units, the secondary distribution units corresponding to the secondary carriers to be aggregated can be determined by obtaining the pre-configured carrier aggregation coordination relationship.

[0053] In this embodiment, the UE context modification request further includes a mobility restriction list information element; accordingly, the secondary carrier establishment request includes the mobility restriction list information element in the UE context modification request.

[0054] The mobility restriction list information element is used to represent the matching restriction condition corresponding to the UE context modification request message. The matching restriction condition is used to determine whether the secondary distribution unit corresponding to the secondary carrier to be aggregated matches the primary distribution unit included in the primary base station corresponding to the user equipment (UE). Any information that can be used to represent the matching condition between the secondary distribution unit and the primary distribution unit corresponding to the secondary carrier to be aggregated can be included in the mobility restriction list information element. For example, the mobility restriction list information element can include UE subscription information. For example, the mobility restriction list information element can include all NPN network subscription information of the UE.

[0055] Step S130: determining a UE context modification response message based on the secondary carrier establishment success response message corresponding to the secondary carrier establishment request, so as to configure the secondary carrier to be aggregated for the user equipment UE based on the UE context modification response message.

[0056] Among them, the secondary carrier establishment success response message is sent by the secondary distribution unit, and the secondary carrier configuration in the UE context modification response message can be determined based on the secondary carrier establishment success response message; accordingly, the main centralized unit can configure the secondary carrier to be aggregated for the user equipment UE based on the UE context modification response message.

[0057] Among them, the auxiliary distribution unit corresponding to the auxiliary carrier to be aggregated is used to determine whether to return a secondary carrier establishment success response message based on the mobile restriction list information element. The above-mentioned mobile restriction list information element is used to represent the matching restriction condition corresponding to the UE context modification request message, and the matching restriction condition is used to limit whether the auxiliary distribution unit corresponding to the auxiliary carrier to be aggregated matches the main distribution unit included in the main base station corresponding to the user equipment UE. Any information that can be used to represent the matching condition between the auxiliary distribution unit corresponding to the auxiliary carrier to be aggregated and the main distribution unit can be included in the mobile restriction list information element. For example, the mobile restriction list information element can include UE subscription information; accordingly, the auxiliary distribution unit corresponding to the auxiliary carrier to be aggregated can match the UE subscription information corresponding to the mobile restriction list information element with the network configuration information supported by the auxiliary distribution unit, and determine whether to return a secondary carrier establishment success response message based on the matching result.

[0058] It can be seen that this method adds a mobility restriction list information element to the UE context modification request message and uses the mobility restriction list information element as a matching criterion, so that the auxiliary distribution unit can directly determine whether to return a secondary carrier establishment success response message to the main distribution unit based on the mobility restriction list information element contained in the secondary carrier establishment request, and then the main distribution unit can return a UE context modification response message to the main centralized unit based on the secondary carrier establishment success response message, thereby achieving the purpose of configuring the secondary carrier to be aggregated for the user equipment UE. Therefore, with the help of the mobility restriction list information element, the auxiliary distribution unit can directly determine whether to return a secondary carrier establishment success response message without going through the main centralized unit CU as a transit station, thereby achieving the effect of direct communication between the main DU and the auxiliary DU and rapid configuration of the secondary carrier. This method realizes direct communication between the main distribution unit and the auxiliary distribution unit, improves the efficiency of data information transmission, and can quickly add cross-site auxiliary carriers for the user equipment UE, improve service performance and efficiency, and significantly improve user experience.

[0059] In one optional implementation, to rationally allocate communication resources and avoid communication interference, the secondary carrier establishment request also includes the initial wireless dedicated reception resources of the primary carrier corresponding to the primary distribution unit. Accordingly, the secondary carrier establishment success response message also includes the wireless dedicated reception resources of the secondary carrier corresponding to the secondary distribution unit after staggering.

[0060] In an optional implementation, when there are multiple secondary carriers to be aggregated and multiple secondary distribution units corresponding to the secondary carriers to be aggregated, in order to achieve direct communication between any two distribution units, before determining a UE context modification response message based on a secondary carrier establishment success response message corresponding to a secondary carrier establishment request, the following operations are further performed: time-domain staggering is performed on the initial wireless dedicated admission resources of the primary carrier corresponding to the primary distribution unit based on the staggered wireless dedicated admission resources of the secondary carrier corresponding to each secondary distribution unit to obtain the staggered wireless dedicated admission resources of the primary carrier corresponding to the primary distribution unit; coordination configuration information is generated based on the staggered wireless dedicated admission resources of the primary carrier corresponding to the primary distribution unit and the staggered wireless dedicated admission resources of the secondary carrier corresponding to each secondary distribution unit, and a secondary carrier modification request message is generated based on the coordination configuration information; and the secondary carrier modification request message is sent to each secondary distribution unit respectively, and a secondary carrier modification response message returned by each secondary distribution unit is received. It can be seen that since the auxiliary carrier modification request message in this method is generated based on the collaborative configuration information, and the collaborative configuration information contains the basic information required by the two distributed units in the process of mutual communication, the auxiliary distributed units can communicate messages based on the collaborative configuration information.

[0061] In an optional implementation, the collaborative configuration information can be generated by: obtaining the NR cell global identifier of the main carrier corresponding to the main distribution unit, the NR cell global identifier of the secondary carrier corresponding to each secondary distribution unit, the service cell index of the main carrier corresponding to the main distribution unit, and the secondary cell pre-established list information element corresponding to each secondary distribution unit. The above-mentioned collaborative configuration information is generated according to the wireless dedicated admission resources of the main carrier after staggering corresponding to the main distribution unit, the wireless dedicated admission resources of the secondary carrier after staggering corresponding to each secondary distribution unit, the NR cell global identifier of the main carrier corresponding to the main distribution unit, the NR cell global identifier of the secondary carrier corresponding to each secondary distribution unit, the service cell index of the main carrier corresponding to the main distribution unit, and the secondary cell pre-established list information element corresponding to each secondary distribution unit; wherein the above-mentioned collaborative configuration information is used to implement message communication between the media access control MAC (Media Access Control) layers of any two distribution units. As can be seen, in this approach, in addition to the wireless dedicated reception resources of the staggered primary carrier corresponding to the primary distributed unit and the wireless dedicated reception resources of the staggered secondary carrier corresponding to each secondary distributed unit, the coordinated configuration information further includes the following four items of information: the NR cell global identifier of the primary carrier corresponding to the primary distributed unit, the NR cell global identifier of the secondary carrier corresponding to each secondary distributed unit, the serving cell index of the primary carrier corresponding to the primary distributed unit, and the secondary cell pre-established list information element corresponding to each secondary distributed unit. Because the coordinated configuration information contains more and more comprehensive information, it is possible to more conveniently and accurately establish connections between distributed units, thereby enabling message transmission between any two distributed units.

[0062] Among them, the above four items of information are all sent by the CU. For example, the NR cell global identifier of the main carrier corresponding to the main distribution unit and the service cell index of the main carrier corresponding to the main distribution unit can be carried when the UE initially accesses the CU in the main base station; the NR cell global identifier of the secondary carrier corresponding to each secondary distribution unit and the secondary cell pre-established list information element corresponding to each secondary distribution unit can be carried through the UE context modification request message transmitted through the F1 port. In short, this application does not limit the specific method of obtaining the above four items of information. The focus of this embodiment is to generate collaborative configuration information through multiple information, so as to facilitate the mutual communication between any two distribution units.

[0063] In an optional implementation, after receiving a secondary carrier modification response message returned by each secondary distributed unit, the following operations are further performed: in response to uplink control information of a user equipment (UE), if the information type of the uplink control information is a preset type, determining the primary carrier or secondary carrier corresponding to the uplink control information of the preset type; determining the secondary distributed unit corresponding to the uplink control information of the preset type based on the primary carrier or secondary carrier corresponding to the uplink control information of the preset type and the coordination configuration information in the secondary carrier modification request message; and forwarding the uplink control information of the preset type to the secondary distributed unit corresponding to the uplink control information. Uplink control information (UCI) is uplink control information fed back by the UE to the base station. The preset type of uplink control information may include CSI reporting and / or downlink data AN feedback information. In this embodiment, upon receiving the preset type of uplink control information, the secondary distributed unit corresponding to the preset type of uplink control information can be determined based on the coordination configuration information, thereby enabling communication with the secondary distributed unit, and then forwarding the preset type of uplink control information to the secondary distributed unit corresponding to the uplink control information. Thus, with the help of the coordination configuration information, direct communication between two distributed units can be achieved.

[0064] In an optional implementation, the above method further includes: when the main distribution unit receives the data transmission instruction, data transmission is performed with the RLC layer deployment module contained in the secondary distribution unit according to the communication address of the radio link control RLC layer deployment module of the secondary carrier. It can be seen that this embodiment can realize data transmission between the main distribution unit and any secondary distribution unit through the communication address of the RLC layer deployment module. For example, the secondary carrier establishment request further includes: the communication address of the RLC layer deployment module of the main carrier contained in the main distribution unit; and the secondary carrier establishment response message further includes: the communication address of the RLC layer deployment module of the secondary carrier contained in the secondary distribution unit corresponding to the secondary carrier. Accordingly, data transmission between the main distribution unit and the RLC layer deployment module contained in any secondary distribution unit can be realized through the communication address of the RLC layer deployment module.

[0065] Another embodiment of the present application further provides a method for configuring a secondary carrier, which is applicable to a secondary distributed unit. FIG2 shows a flow chart of a method for configuring a secondary carrier applicable to a secondary distributed unit. As shown in FIG2 , the method includes the following steps S210 and S220:

[0066] Step S210: receiving a secondary carrier establishment request including a mobility restriction list information element sent by a primary distribution unit.

[0067] Among them, this step is performed by the auxiliary distribution unit, and the auxiliary carrier establishment request can be generated in the following manner: the main distribution unit receives the UE context modification request message sent by the main centralized unit included in the main base station, obtains the auxiliary cell pre-establishment list information element and the mobility restriction list information element included in the UE context modification request message; and determines the auxiliary carrier to be aggregated according to the secondary cell pre-establishment list information element, and generates a auxiliary carrier establishment request when the auxiliary distribution unit corresponding to the auxiliary carrier to be aggregated has a carrier aggregation cooperative relationship with the main distribution unit.

[0068] Step S220: Generate a secondary carrier establishment success response message according to the mobility restriction list information element in the secondary carrier establishment request, and return the secondary carrier establishment success response message to the main distribution unit, so that the main distribution unit can obtain a UE context modification response message based on the secondary carrier establishment success response message, and configure the secondary carrier to be aggregated for the user equipment UE based on the UE context modification response message.

[0069] Among them, the auxiliary distribution unit determines whether to return a secondary carrier establishment success response message based on the mobility restriction list information element. The above-mentioned mobility restriction list information element is used to represent the matching restriction condition corresponding to the UE context modification request message, and the matching restriction condition is used to limit whether the auxiliary distribution unit corresponding to the auxiliary carrier to be aggregated matches the main distribution unit included in the main base station corresponding to the user equipment UE. Any information that can be used to represent the matching condition between the auxiliary distribution unit corresponding to the auxiliary carrier to be aggregated and the main distribution unit can be included in the mobility restriction list information element. For example, the mobility restriction list information element can include UE subscription information. Accordingly, the auxiliary distribution unit corresponding to the auxiliary carrier to be aggregated can match the UE subscription information corresponding to the mobility restriction list information element with the network configuration information supported by the auxiliary distribution unit, and determine whether to return a secondary carrier establishment success response message based on the matching result.

[0070] In an optional implementation, when generating a secondary carrier establishment success response message based on a mobility restriction list information element, the UE subscription information corresponding to the mobility restriction list information element is matched with the network configuration information supported by the secondary carrier corresponding to the secondary distribution unit, and a secondary carrier establishment success response message is generated based on the matching result. The UE subscription information is used to indicate whether the user equipment UE supports non-public networks (NPNs) and the types of non-public network (NPN) supported, and the network configuration information is used to indicate the network type of the secondary carrier corresponding to the secondary distribution unit. For example, the network configuration information is used to indicate whether the secondary carrier corresponding to the secondary distribution unit belongs to an NPN CAG (Closed Access Group)-only cell or a CAG (Closed Access Group) cell and the types of non-public network (NPN) supported.

[0071] In an optional implementation, the UE subscription information corresponding to the mobility restriction list element is matched with the network configuration information supported by the secondary carrier corresponding to the secondary distribution unit, and the process of generating a secondary carrier establishment success response message based on the matching result specifically includes the following: obtaining the user group identifier in the UE subscription information corresponding to the mobility restriction list element, and the user group identifier in the network configuration information supported by the secondary carrier corresponding to the secondary distribution unit; matching the user group identifier in the UE subscription information corresponding to the mobility restriction list element and the user group identifier in the network configuration information; if the matching result shows that the match is successful, generating a secondary carrier establishment success response message based on the successfully matched user group identifier.

[0072] In an optional implementation, obtaining the user group identifier contained in the UE subscription information corresponding to the mobility restriction list information element and the user group identifier in the network configuration information supported by the secondary carrier corresponding to the secondary distribution unit includes: judging whether the user equipment UE supports the non-public network NPN according to the UE subscription information, and judging whether the secondary carrier corresponding to the secondary distribution unit belongs to a user group cell of a preset type according to the network configuration information, and obtaining a judgment result; if the judgment result meets the preset conditions, obtaining the user group identifier in the UE subscription information corresponding to the mobility restriction list information element and the user group identifier in the network configuration information supported by the secondary carrier corresponding to the secondary distribution unit.

[0073] Specifically, the user group identifier may be: for a user equipment UE supporting an NPN network, it may be PLMN information and an NPN network identifier; for a common UE, it may be PLMN (Public Land Mobile Network) information.

[0074] The preset conditions include: the user equipment UE supports the non-public network NPN, and the secondary carrier corresponding to the secondary distribution unit belongs to a user group cell of a first preset type; or the user equipment UE does not support the non-public network NPN, and the secondary carrier corresponding to the secondary distribution unit belongs to a user group cell of a second preset type.

[0075] For example, the following three situations all meet the preset conditions:

[0076] In the first case, the user equipment UE supports SNPN (Stand-alone Non-Public Network), and the user group cell of the first preset type is an SNPN cell;

[0077] In the second case, the user equipment UE supports PNI-NPN (Public Network Integrated Non-Public Network), and the user group cell of the first preset type is a CAG-only cell or a CAG cell;

[0078] In the third case, the user equipment UE does not support NPN (ie, the user equipment UE is a normal UE), and the user group cell of the second preset type is a CAG cell or a normal cell.

[0079] In an optional implementation, a secondary carrier establishment success response message is returned to the main distribution unit in the following manner: the initial wireless dedicated acceptance resources of the main carrier corresponding to the main distribution unit contained in the secondary carrier establishment request are obtained; according to the initial wireless dedicated acceptance resources of the main carrier corresponding to the main distribution unit, the initial wireless dedicated acceptance resources of the secondary carrier corresponding to the secondary distribution unit are performed with time domain staggering processing to obtain the wireless dedicated acceptance resources of the secondary carrier after the staggering processing corresponding to the secondary distribution unit; and a secondary carrier establishment success response message containing the wireless dedicated acceptance resources of the secondary carrier after the staggering processing corresponding to the secondary distribution unit is returned to the main distribution unit.

[0080] In one optional implementation, the secondary distribution unit includes: a secondary distribution unit corresponding to the secondary carrier to be aggregated. Accordingly, after returning a secondary carrier establishment success response message containing the wireless dedicated admission resources of the staggered secondary carrier corresponding to the secondary distribution unit to the primary distribution unit, the secondary distribution unit further obtains coordination configuration information contained in the secondary carrier modification request message from the primary distribution unit; and implements message communication between the MAC layers of any two distribution units based on the coordination configuration information. The specific method for generating the coordination configuration information can be found in the corresponding description of the previous embodiment and will not be repeated here.

[0081] In an optional implementation, after returning the secondary carrier modification response message to the main distribution unit, the following operations are further performed: in response to the uplink control information of the user equipment UE, when the information type of the uplink control information is a preset type, determining the main carrier or secondary carrier corresponding to the uplink control information of the preset type; determining the main distribution unit or secondary distribution unit corresponding to the uplink control information of the preset type according to the main carrier or secondary carrier corresponding to the uplink control information of the preset type and the coordinated configuration information; and forwarding the uplink control information of the preset type to the main distribution unit or secondary distribution unit corresponding to the uplink control information of the preset type.

[0082] In an optional implementation, the method further includes the following operation: when the secondary distribution unit receives a data transmission instruction, data is transmitted with the RLC layer deployment module included in the primary distribution unit according to the communication address of the RLC layer deployment module of the primary carrier.

[0083] In an optional implementation, the UE context modification request message also includes: a secondary cell pre-establishment cause value. Accordingly, when configuring the secondary carrier to be aggregated for the user equipment UE based on the UE context modification response message, the priority of the secondary carrier configuration can be determined according to the secondary cell pre-establishment cause value; and the secondary carrier to be aggregated is configured for the user equipment UE according to the priority of the secondary carrier configuration.

[0084] In an optional implementation, the secondary cell pre-establishment cause value includes at least one of the following: a first type of cause value corresponding to resource congestion on the primary base station side; a second type of cause value corresponding to the service volume of the user equipment UE; a third type of cause value corresponding to the service type of the user equipment UE; a fourth type of cause value corresponding to maximization of the cell spectrum efficiency estimate; a fifth type of cause value corresponding to signal measurement; and a sixth type of cause value corresponding to other causes.

[0085] Another embodiment of the present application further provides a method for configuring a secondary carrier, which is applicable to a primary centralized unit included in a primary base station corresponding to a user equipment UE. FIG3 shows a flow chart of the method for configuring a secondary carrier of the primary centralized unit included in the primary base station corresponding to the user equipment UE. As shown in FIG3 , the method includes the following steps S310 and S320:

[0086] Step S310: Sending a UE context modification request message to the primary distribution unit included in the primary base station; wherein the UE context modification request message includes a secondary cell pre-established list information element and a mobility restriction list information element.

[0087] Step S320: Receive a UE context modification response message returned by the primary distribution unit, and configure a secondary carrier to be aggregated for the user equipment UE according to the UE context modification response message; wherein the UE context modification response message is generated by the method in the above embodiment.

[0088] In an optional implementation, before sending the UE context modification request message to the main distribution unit included in the main base station, a mobility restriction list information element is further obtained and the mobility restriction list information element is added to the UE context modification request message, so that the UE context modification request message includes the mobility restriction list information element.

[0089] The following describes the implementation of the above method with reference to the accompanying drawings:

[0090] In some related technologies, when a user equipment UE accesses a base station, the CU (Central Unit) sends a UE context setup request message (UE CONTEXT SETUP REQUEST, a signaling message used to establish a UE instance context on the DU side in 3GPP 38.473) through the F1 interface to notify the DU (Distributed Unit) side to establish all the secondary carriers indicated in the configuration. After the DU side successfully configures the corresponding secondary carrier, it replies to the CU with a UE context setup response message (UE CONTEXT SETUP RESPONSE) carrying the secondary carrier configuration information result. After the CU obtains the information, it configures it to the user equipment UE (terminal) through an RRC reconfiguration (RRC Reconfiguration, 3GPP 38.331 signaling message). In related technologies, in the process of configuring cross-site secondary carriers, the CU can only be used as a transit station to realize the transmission of signaling messages between cross-site DUs and DUs. Compared with direct communication between DUs, the delay is longer, which is not conducive to MAC layer scheduling, affects user traffic, and thus affects user experience. To address the above issues, the present disclosure provides a method, unit, system, electronic device, and storage medium for configuring an auxiliary carrier. By enabling direct communication between DUs, the configuration efficiency of cross-site auxiliary carriers is improved, and the efficiency of data information transmission is improved, thereby enhancing the user experience.

[0091] FIG4 is a flow chart of a method for configuring a secondary carrier according to an embodiment of the present disclosure. Referring to FIG4 , an embodiment of the present disclosure provides a method for configuring a secondary carrier, which is applicable to a primary distribution unit included in a primary base station corresponding to a user equipment (UE). The method includes steps S410 to S430:

[0092] Step S410: receiving a UE context modification request message sent by a primary centralized unit included in a primary base station, and obtaining a secondary cell pre-established list information element and a mobility restriction list information element included in the UE context modification request message.

[0093] A base station is a public mobile communication base station. It is an interface device for mobile devices to access the Internet. It is also a form of radio station. It refers to a radio transceiver station that transmits information between mobile phone terminals through a mobile communication exchange center within a certain radio coverage area.

[0094] Fifth-generation mobile communication technology (5G, also known as NR, New Radio) is a new generation of broadband mobile communication technology characterized by high speed, low latency, and massive connectivity. 5G communication infrastructure is the network infrastructure that enables the interconnection of humans, machines, and objects. The 5G base station (gNB), the next generation Node B, is the core equipment of the 5G network, providing wireless coverage and enabling wireless signal transmission between wired communication networks and wireless terminals.

[0095] 5G gNB functionality is restructured into two functional entities: a centralized unit (CU) and a distributed unit (DU). Specifically, the CU utilizes a general-purpose platform, primarily encompassing non-real-time wireless high-layer protocol stack functionality. It supports not only wireless network functions but also core network functions and edge applications. The DU utilizes a dedicated platform or a hybrid of general and dedicated platforms, supporting high-density mathematical operations and primarily handling physical layer functions and real-time Layer 2 (data link layer) functions.

[0096] Each base station contains only one centralized unit (CU), which can control multiple distributed units (DUs). Therefore, when the primary CU and primary distributed unit (DU) are determined for the primary gNB corresponding to the user equipment (UE), all other DUs in the primary gNB and other gNBs are secondary distributed units (DUs).

[0097] Each distributed unit (DU) can support one or more cells. A cell is a wireless coverage area identified by a base station identity code (BSIC) or a cell global identifier (CGI).

[0098] During operator network deployment, coverage capabilities vary across frequency bands, often necessitating simultaneous coverage of certain terminals by carriers originating from different sites. From a carrier aggregation perspective, adding a cross-site secondary carrier is necessary. When adding a secondary carrier for a user equipment (UE), when the UE accesses a master gNB comprised of a master CU and a master DU, the master CU sends a UE Context Modification Request message to the corresponding master DU via the F1 interface.

[0099] Among them, the UE CONTEXT MODIFICATION REQUEST message is a signaling message used to modify the UE context on the DU side in 3GPP 38.473. The UE CONTEXT MODIFICATION REQUEST message carries the SCell To Be Setup List information element and the Mobility Restriction List (3GPP 38.423) information element.

[0100] Among them, the pre-established list of secondary cells contains relevant information of the secondary carriers to be aggregated, including: the secondary cell index (sCell Index, 3GPP 38.473) of the secondary carrier to be aggregated, the NR cell global identifier NR CGI of the secondary carrier to be aggregated, the CA type (whether uplink CA is supported), and the serving cell measurement object (servingCellMo, 3GPP 38.473), etc.

[0101] Step S420: Determine the secondary carrier to be aggregated according to the secondary cell pre-established list information element, and send a secondary carrier establishment request including a mobility restriction list information element to the secondary distribution unit if there is a carrier aggregation coordination relationship between the secondary distribution unit corresponding to the secondary carrier to be aggregated and the primary distribution unit.

[0102] Among them, the secondary carrier to be aggregated and its corresponding gNB and CA type are determined according to the relevant information of the carrier contained in the secondary cell pre-established list information element.

[0103] Among them, the carrier aggregation coordination relationship (CA coordination relationship) refers to the collaborative working relationship between different carriers in carrier aggregation. In CA, it is necessary to ensure that each carrier can operate in a coordinated manner to achieve higher data transmission rates and network performance. For two cells supported by a primary DU and a secondary DU respectively, the carrier corresponding to the secondary DU is added as a secondary carrier of the UE corresponding to the primary DU only when there is a CA coordination relationship between the primary DU and the secondary DU, that is, whether there is a CA coordination relationship between the cross-station DUs determines whether the primary DU can communicate with the secondary DU. Among them, before the process of configuring the addition of the secondary carrier begins, the CA coordination relationship between the primary DU and other DUs is pre-established, so that in step S420, it is determined whether the secondary DU corresponding to the secondary carrier to be aggregated has already established a CA coordination relationship with the primary DU in advance.

[0104] Among them, the secondary carrier establishment request includes: secondary cell pre-establishment list information element, mobility restriction list information element, Global gNB ID of the base station to which the primary DU belongs, Global gNB ID of the base station to which the secondary DU belongs, NR cell global identifier NR CGI of the primary carrier corresponding to the primary DU, UE capability information and UE radio bearer configuration information contained in the secondary carrier corresponding to the secondary DU (the bearer configuration content is aligned with RLC-BearerConfig in the 3GPP 38.331 protocol).

[0105] Step S430: Upon receiving the secondary carrier establishment success response message returned by the secondary distribution unit corresponding to the secondary carrier to be aggregated, a UE context modification response message is returned to the main centralized unit according to the secondary carrier establishment success response message, so that the main centralized unit can configure the secondary carrier to be aggregated for the user equipment UE according to the UE context modification response message.

[0106] The secondary distribution unit corresponding to the secondary carrier to be aggregated is configured to match the UE subscription information corresponding to the mobility restriction list information element with the network configuration information supported by the secondary distribution unit, and determine whether to return a secondary carrier establishment success response message based on the matching result. The UE subscription information corresponding to the mobility restriction list is used as a criterion for determining whether the secondary carrier to be aggregated can be added and configured as a secondary carrier for the current UE.

[0107] In an optional implementation, UE subscription information is used to indicate whether the user equipment (UE) supports non-public network (NPN) and the type of non-public network (NPN) supported. Furthermore, network configuration information is used to indicate whether the secondary carrier corresponding to the secondary distribution unit is an NPN CAG-only cell or a CAG cell, as well as the type of non-public network (NPN) supported. A CAG (Closed Access Group) cell is a cell under whose coverage CAG members can obtain normal communication services, and an NPN CAG-only cell is an NPN-only private network cell defined in 3GPP protocols 38.300 and 38.331. Furthermore, if a match is successful, the UE NPN network identifier and PLMN (Public Land Mobile Network) corresponding to the matched user equipment (UE) are obtained. In scenarios where a public network (or a public network supporting network sharing) and an NPN private network coexist, the corresponding base station configuration information is obtained based on the matched UE NPN network identifier and PLMN for admission. The base station configuration information is used to indicate the radio resource allocation ratio of the secondary carrier corresponding to the secondary distribution unit.

[0108] In an optional implementation, the above-mentioned matching result is specifically the result of matching and accepting the UE subscription information corresponding to the mobility restriction list element and the network configuration information supported by the secondary carrier corresponding to the secondary DU. When the UE subscription information corresponding to the mobility restriction list element and the network configuration information supported by the secondary carrier corresponding to the secondary DU are matched and accepted successfully (at least one secondary carrier in the secondary DU is matched and accepted successfully), the primary DU receives a secondary carrier establishment success response message returned from the secondary DU corresponding to the secondary carrier to be aggregated. Conversely, the primary DU receives a secondary carrier establishment failure response message returned from the secondary DU corresponding to the secondary carrier to be aggregated. Among them, the secondary carrier establishment success response message is used to indicate that the connection between the primary DU and the secondary DU is successfully established, and the process of adding the carrier corresponding to the secondary DU as the secondary carrier of the UE corresponding to the primary DU can be further completed through subsequent operation steps.

[0109] The UE CONTEXT MODIFICATION RESPONSE message is a feedback message corresponding to the UE CONTEXT MODIFICATION REQUEST message, and is used by the primary DU to feed back to the primary CU relevant information of the cross-site secondary carrier corresponding to the connected secondary DU.

[0110] In summary, according to an embodiment of the present disclosure, a method for configuring a secondary carrier is provided. The method is applicable to a primary distribution unit included in a primary base station corresponding to a user equipment UE. First, a UE context modification request message is received from a primary centralized unit included in the primary base station, and a secondary cell pre-established list information element and a mobility restriction list information element included in the UE context modification request message are obtained. Second, a secondary carrier to be aggregated is determined based on the secondary cell pre-established list information element. If a carrier aggregation cooperative relationship exists between the secondary distribution unit corresponding to the secondary carrier to be aggregated and the primary distribution unit, a secondary carrier establishment request including a mobility restriction list information element is sent to the secondary distribution unit. Finally, upon receiving a secondary carrier establishment success response message returned by the secondary distribution unit corresponding to the secondary carrier to be aggregated, a UE context modification response message is returned to the primary centralized unit based on the secondary carrier establishment success response message, so that the primary centralized unit configures the secondary carrier to be aggregated for the user equipment UE based on the UE context modification response message. The secondary distribution unit corresponding to the secondary carrier to be aggregated is configured to match the UE subscription information corresponding to the mobility restriction list information element with the network configuration information supported by the secondary distribution unit, and determine whether to return a secondary carrier establishment success response message based on the matching result. As can be seen, this method adds a mobility restriction list information element to the UE context modification request message and uses the UE subscription information corresponding to the mobility restriction list information element as a matching criterion to match the network configuration information supported by the secondary distribution unit, thereby enabling direct communication between the primary distribution unit and the secondary distribution unit, improving the efficiency of data information transmission, and thus quickly adding cross-site secondary carriers for user equipment (UE), improving service performance and efficiency, and significantly enhancing the user experience. Therefore, this method is applicable to various DRAN (distributed radio access network) and CRAN (centralized radio access network) networking scenarios, and can quickly configure multiple cross-site secondary carriers, significantly improving the user experience.

[0111] In an optional implementation, the UE subscription information is used to indicate whether the user equipment (UE) supports non-public network NPNs and the types of non-public network NPNs supported, and the network configuration information is used to indicate whether the secondary carrier corresponding to the secondary distribution unit belongs to an NPN CAG-only cell or a CAG cell and the types of non-public network NPNs supported. The UE subscription information is specifically the subscribed UE NPN network identification information or PLMN information. Furthermore, the above-mentioned matching result is specifically the result of matching and accepting the UE subscription information corresponding to the mobility restriction list information element with the network configuration information supported by the secondary carrier corresponding to the secondary DU.

[0112] Therefore, the specific implementation of the process of matching the UE subscription information corresponding to the mobility restriction list information element with the network configuration information supported by the secondary carrier corresponding to the secondary distribution unit and determining whether to return the secondary carrier establishment success response message based on the matching result is as follows:

[0113] First, determine whether the user equipment UE supports the non-public network NPN according to the UE subscription information;

[0114] If the user equipment UE supports non-public network NPN, the NPN network identifier and PLMN included in the UE subscription information corresponding to the mobility restriction list information element are obtained; if the user equipment UE does not support non-public network NPN, the PLMN included in the UE subscription information corresponding to the mobility restriction list information element is obtained.

[0115] Secondly, determine whether the secondary carrier corresponding to the secondary distribution unit belongs to an NPN CAG-only cell or a CAG cell based on the network configuration information;

[0116] If the secondary carrier corresponding to the secondary distribution unit belongs to an NPN CAG-only cell or a CAG cell, obtain the NPN network identifier and PLMN included in the network configuration information supported by the secondary carrier corresponding to the secondary distribution unit;

[0117] Finally, for user equipment (UE) supporting NPN networks, the NPN network identifier and PLMN included in the UE's subscription information are matched with the NPN network identifier and PLMN included in the network configuration information. For standard UEs, the UE's serving PLMN is matched with the PLMN included in the network configuration information (i.e., the PLMN included in the UE's subscription information is matched with the PLMN included in the network configuration information). If a match is successful, a secondary carrier is configured based on the matched "user group identifier" (i.e., the NPN network identifier and PLMN), and a secondary carrier establishment success response message is returned. Non-public networks (NPNs) serve private entities such as enterprises and can be deployed as completely independent networks or managed using a PLMN, providing services according to the PLMN. According to NPN network requirements, unauthorized UEs cannot attempt to access the NPN network. Access can also be restricted to users supporting only NPNs, preventing them from accessing the public network. Furthermore, authorized UEs may be allowed to access both the public and NPN networks. Currently, in the 3GPP standard, there are two types of NPN networks: PNI-NPN (Public Network Integrated Non-Public Network) and SNPN (Stand-alone Non-Public Network).

[0118] It can be seen from this that the auxiliary carrier configuration method provided by the above embodiment can quickly add cross-site auxiliary carriers by realizing direct communication between the main DU and the auxiliary DU in a scenario where public networks and non-public network NPNs coexist, further broadening the use scenario of the auxiliary carrier configuration method provided by the embodiment of the present disclosure.

[0119] In an optional implementation, in order to reasonably divide communication resources and avoid communication interference, the auxiliary carrier establishment request also includes: the initial wireless dedicated reception resources of the main carrier corresponding to the main distribution unit and the wireless dedicated reception resources of other non-carriers; the auxiliary carrier establishment success response message also includes: the wireless dedicated reception resources of the auxiliary carrier after staggered processing corresponding to the auxiliary distribution unit.

[0120] Among them, the wireless dedicated acceptance resources of the auxiliary carrier after the staggered processing corresponding to the auxiliary distribution unit are obtained in the following way: the auxiliary distribution unit performs time domain staggering processing on the initial wireless dedicated acceptance resources of the auxiliary carrier corresponding to the auxiliary distribution unit according to the initial wireless dedicated acceptance resources of the main carrier corresponding to the main distribution unit and the wireless dedicated acceptance resources of other non-carriers, and obtains the wireless dedicated acceptance resources of the auxiliary carrier after the staggered processing corresponding to the auxiliary distribution unit.

[0121] In an optional implementation, when there are multiple secondary carriers to be aggregated and there are multiple secondary distribution units corresponding to the secondary carriers to be aggregated, in order to achieve direct communication between the secondary distribution units, before returning the UE context modification response message to the main centralized unit according to the secondary carrier establishment success response message, a secondary carrier modification process is further performed. FIG5 shows a schematic diagram of the secondary carrier modification process. As shown in FIG5, the secondary carrier modification process specifically includes the following steps S510-S530:

[0122] Step S510: performing time-domain staggering on the initial wireless dedicated reception resources of the main carrier corresponding to the main distribution unit according to the staggered wireless dedicated reception resources of the secondary carrier corresponding to each secondary distribution unit, to obtain the staggered wireless dedicated reception resources of the main carrier corresponding to the main distribution unit.

[0123] Step S520: Generate collaborative configuration information based on the wireless dedicated admission resources of the main carrier after the staggered processing corresponding to the main distribution unit, the wireless dedicated admission resources of the secondary carrier after the staggered processing corresponding to each secondary distribution unit, the NR cell global identifier of the main carrier corresponding to the main distribution unit, the NR cell global identifier of the secondary carrier corresponding to each secondary distribution unit, the service cell index of the main carrier corresponding to the main distribution unit, and the secondary cell pre-established list information element corresponding to each secondary distribution unit, and generate a secondary carrier modification request message based on the collaborative configuration information.

[0124] Step S530: sending a secondary carrier modification request message containing the coordination configuration information to each secondary distributed unit respectively, and receiving a secondary carrier modification response message returned by each secondary distributed unit.

[0125] As can be seen, in a secondary carrier configuration method implemented in this manner, when there are multiple secondary carriers to be aggregated and multiple secondary DUs corresponding to the secondary carriers to be aggregated, each secondary carrier setup request sent to a target secondary DU includes, in addition to the initial wireless dedicated admission resources of the primary carrier corresponding to the primary distribution unit, the wireless dedicated admission resources of the added secondary carriers. This allows the target secondary DU to perform time-domain staggering on the initial wireless dedicated admission resources of the primary carrier corresponding to the primary distribution unit, the wireless dedicated admission resources of the added secondary carriers, and its own wireless dedicated admission resources, obtaining the staggered wireless dedicated admission resources of the secondary carrier corresponding to the target secondary DU and returning them to the primary DU. Furthermore, the staggered wireless dedicated admission resources of the secondary carrier corresponding to the current target secondary DU can be added to the secondary carrier setup request and sent to the next target secondary DU. The aforementioned time-domain staggering and other operations are repeated for the next target secondary DU to obtain the staggered wireless dedicated admission resources of the secondary carrier corresponding to the next target secondary DU, ultimately obtaining the staggered wireless dedicated admission resources of the secondary carrier corresponding to each secondary DU. The above process realizes direct communication between auxiliary DUs, further improving the transmission efficiency of data information.

[0126] In an optional implementation, the collaborative configuration information also includes the physical cell identifier and carrier identifier of each secondary carrier to be aggregated, which is used to implement message communication between the MAC layers of any two distribution units. In order to implement service collaborative interaction between the MAC layers of the user equipment UE and the DU based on the collaborative configuration information, after receiving the secondary carrier modification response message returned by each secondary distribution unit, if the secondary carrier of the user equipment UE is successfully configured and activated, and the user equipment UE generates upload or download services, the uplink control information forwarding process is further executed. Figure 6 shows a schematic diagram of the uplink control information forwarding process. As shown in Figure 6, the above method includes the following steps S610-S630:

[0127] Step S610: In response to received uplink control information of a preset type sent by user equipment UE, determine a primary carrier or a secondary carrier corresponding to the uplink control information of the preset type.

[0128] Step S620: Determine the secondary distribution unit corresponding to the preset type of uplink control information according to the primary carrier or secondary carrier corresponding to the preset type of uplink control information and in combination with the coordination configuration information included in the secondary carrier modification request message.

[0129] Step S630: forwarding the preset type of uplink control information to the secondary distribution unit corresponding to the preset type of uplink control information.

[0130] In the secondary carrier configuration method implemented based on the above-mentioned manner, the secondary carrier establishment request also includes: the PHY layer configuration information of the UE secondary carrier on the base station side contained in the secondary DU (PhysicalCellGroupConfig information, corresponding to the information element in the 3GPP 38.331 protocol, the secondary station physical layer configuration of the UE secondary carrier) and MAC layer configuration information (MAC-CellGroupConfig information, corresponding to the information element in the 3GPP 38.331 protocol, the media access control layer configuration of the UE secondary carrier), and the cell radio network temporary identifier C-RNTI (Cell Radio Network Temporary Identifier, 3GPP cell radio network temporary identifier).

[0131] Uplink control information (UCI) is uplink control information fed back by the UE to the base station, including CSI (Channel State Information), ACK / NACK (Acknowledgement / Negative Acknowledgement), and SR (Scheduling Request). The uplink control information carrying CSI content includes the identifier of the newly configured UE carrier (including the primary carrier or the secondary carrier). In an optional implementation, the preset type of uplink control information includes: CSI reporting and / or downlink data AN feedback information.

[0132] It can be seen from this that according to the configuration method of the secondary carrier implemented in the above manner, a collaborative link can be established between the MAC layers of the DU and the DU, thereby realizing direct communication between the MAC layers of the main DU and the secondary DU, or the secondary DU and the secondary DU, which is conducive to the faster transmission of subsequent internal UE scheduling information of the MAC layer, thereby improving user traffic.

[0133] In an optional implementation, the secondary carrier establishment request further includes: the communication address (IP address) of the RLC layer deployment module of the primary carrier contained in the primary distribution unit; and the secondary carrier establishment success response message further includes: the communication address of the RLC layer deployment module of the secondary carrier contained in the secondary distribution unit corresponding to the secondary carrier.

[0134] The communication address of the RLC layer deployment module is used to implement data transmission between the primary distribution unit and the RLC layer deployment module included in any secondary distribution unit.

[0135] It can be seen that according to the configuration method of the secondary carrier implemented in the above manner, by realizing direct communication between DUs at the signaling layer, the primary DU can obtain the IP address of the secondary carrier configured by the secondary DU, and realize direct data communication between DUs at the RLC layer. For example, after the secondary carrier addition configuration process is completed, direct transmission of data packets can be realized, and when there is upload or download service, it can be diverted based on the IP address.

[0136] In an optional implementation, the UE context modification request message further includes a secondary cell pre-establishment cause value, where the secondary cell pre-establishment cause value includes at least one of the following: a first-category cause value corresponding to resource congestion on the primary base station side, a second-category cause value corresponding to the service volume of the user equipment UE, a third-category cause value corresponding to the service type of the user equipment UE, a fourth-category cause value corresponding to maximizing the estimated cell spectrum efficiency, a fifth-category cause value corresponding to signal measurement, and a sixth-category cause value corresponding to other causes. The secondary cell pre-establishment cause value is used to determine the priority of secondary carrier configuration. When the UE secondary cell addition function is enabled under the fusion of multiple secondary cell establishment causes, resource priority acceptance of DUs on the secondary base station side is achieved by transmitting the secondary cell pre-establishment cause value.

[0137] FIG7 is a flowchart of another method for configuring a secondary carrier according to an embodiment of the present disclosure. Referring to FIG7 , an embodiment of the present disclosure provides a method for configuring a secondary carrier, which is applicable to a secondary distribution unit. The method includes steps S710 to S730:

[0138] Step S710: Receive a secondary carrier establishment request including a mobility restriction list information element sent by a primary distribution unit.

[0139] Among them, the auxiliary carrier establishment request is generated in the following manner: the main distribution unit receives the UE context modification request message sent by the main centralized unit included in the main base station, obtains the auxiliary cell pre-establishment list information element and the mobility restriction list information element included in the UE context modification request message; and determines the auxiliary carrier to be aggregated according to the secondary cell pre-establishment list information element, and generates an auxiliary carrier establishment request when the auxiliary distribution unit corresponding to the auxiliary carrier to be aggregated has a carrier aggregation cooperative relationship with the main distribution unit.

[0140] Step S720: Match the corresponding UE subscription information with the network configuration information supported by the secondary carrier corresponding to the secondary distribution unit.

[0141] Step S730: When the UE subscription information corresponding to the information element successfully matches the network configuration information supported by the secondary carrier corresponding to the secondary distribution unit, a secondary carrier establishment success response message is returned to the main distribution unit, so that the main distribution unit can notify the main centralized unit to configure the secondary carrier to be aggregated for the user equipment UE according to the secondary carrier establishment success response message.

[0142] In an optional implementation, FIG8 shows a schematic diagram of the process of sending a secondary carrier establishment success response message. As shown in FIG8, step S730 of returning the secondary carrier establishment success response message to the primary distribution unit may include the following steps S810-S830:

[0143] Step S810: Acquire the initial wireless dedicated admission resource of the primary carrier corresponding to the primary distribution unit included in the secondary carrier establishment request.

[0144] Step S820: performing time-domain staggering on the initial wireless dedicated reception resources of the primary carrier corresponding to the primary distribution unit to obtain the wireless dedicated reception resources of the secondary carrier corresponding to the secondary distribution unit after staggering.

[0145] Step S830: Returning a secondary carrier establishment success response message containing the wireless dedicated reception resources of the secondary carrier after the staggering process corresponding to the secondary distribution unit to the primary distribution unit.

[0146] In an optional implementation, the secondary distribution unit includes: a secondary distribution unit corresponding to the secondary carrier to be aggregated.

[0147] Therefore, after returning a secondary carrier establishment success response message containing the wireless dedicated reception resources of the secondary carrier after the secondary distribution unit has been staggered to the primary distribution unit, the secondary carrier modification process shown in Figure 9 is further executed. As shown in Figure 9, the secondary carrier modification process on the secondary distribution unit side includes the following steps S910 and S920:

[0148] Step S910: receiving a secondary carrier modification request message sent by a primary distribution unit, and acquiring coordination configuration information included in the secondary carrier modification request message.

[0149] Step S920: Return a secondary carrier modification response message to the primary distribution unit.

[0150] The collaborative configuration information includes the physical cell identifier and carrier identifier of the secondary carrier to be aggregated, which is used to realize message communication between the MAC layers of any two distribution units, and the collaborative configuration information is generated in the following manner: the main distribution unit performs time domain staggering processing on the initial wireless dedicated acceptance resources of the main carrier corresponding to the main distribution unit according to the wireless dedicated acceptance resources of the secondary carrier after staggering processing corresponding to the secondary distribution unit, to obtain the wireless dedicated acceptance resources of the main carrier after staggering processing corresponding to the main distribution unit; the collaborative configuration information is generated according to the wireless dedicated acceptance resources of the main carrier after staggering processing corresponding to the main distribution unit, the wireless dedicated acceptance resources of the secondary carrier after staggering processing corresponding to the secondary distribution unit, the NR cell global identifier of the main carrier corresponding to the main distribution unit, the NR cell global identifier of the secondary carrier corresponding to the secondary distribution unit, the service cell index of the main carrier corresponding to the main distribution unit, and the secondary cell pre-established list information element corresponding to the secondary distribution unit.

[0151] In an optional implementation, FIG10 shows a schematic diagram of the forwarding process of uplink control information on the secondary distribution unit side. Accordingly, after returning the secondary carrier modification response message to the primary distribution unit, the method performs the following steps S1010-S1030:

[0152] Step S1010: In response to received uplink control information of a preset type sent by a user equipment UE, determining a primary carrier or a secondary carrier corresponding to the uplink control information of the preset type;

[0153] Step S1020: determining a primary distribution unit or a secondary distribution unit corresponding to the preset type of uplink control information according to the primary carrier or the secondary carrier corresponding to the preset type of uplink control information and in combination with the coordination configuration information;

[0154] Step S1030: forwarding the preset type of uplink control information to the primary distribution unit or the secondary distribution unit corresponding to the preset type of uplink control information.

[0155] In an optional implementation, the secondary carrier establishment request further includes: the communication address of the RLC layer deployment module of the primary carrier contained in the primary distribution unit; and the secondary carrier establishment success response message further includes: the communication address of the RLC layer deployment module of the secondary carrier contained in the secondary distribution unit corresponding to the secondary carrier. The communication address of the RLC layer deployment module is used to implement data transmission between the RLC layer deployment module contained in the primary distribution unit and any secondary distribution unit.

[0156] The various steps in the above-mentioned method embodiment applicable to the auxiliary distribution unit correspond to the steps included in the above-mentioned method embodiment applicable to the main distribution unit included in the main base station corresponding to the user equipment UE. The specific implementation methods and details can be referred to the description of the corresponding part of the above-mentioned method embodiment applicable to the main distribution unit included in the main base station corresponding to the user equipment UE, and will not be repeated here.

[0157] In a third aspect, FIG11 is a flowchart of another method for configuring a secondary carrier provided by an embodiment of the present disclosure. Referring to FIG11 , an embodiment of the present disclosure provides a method for configuring a secondary carrier, applicable to a primary centralized unit included in a primary base station corresponding to a user equipment UE, the method comprising steps S1110 and S1120:

[0158] Step S1110: Send a UE context modification request message to the primary distribution unit included in the primary base station; wherein the UE context modification request message includes a secondary cell pre-established list information element and a mobility restriction list information element.

[0159] Step S1120: Receive a UE context modification response message returned by the primary distribution unit, and configure a secondary carrier to be aggregated for the user equipment UE according to the UE context modification response message.

[0160] The UE context modification response message is generated by the above-mentioned configuration method applicable to the secondary carrier of the primary distribution unit included in the primary base station to which the user equipment UE belongs.

[0161] The various steps in the above-mentioned method embodiment applicable to the main centralized unit included in the main base station corresponding to the user equipment UE correspond to the steps included in the above-mentioned method embodiment applicable to the main distributed unit included in the main base station corresponding to the user equipment UE. The specific implementation methods and the meanings of the terms included therein can refer to the description of the corresponding parts of the above-mentioned method embodiment applicable to the main distributed unit included in the main base station corresponding to the user equipment UE, and will not be repeated here.

[0162] In a fourth aspect, FIG12 is a block diagram of a main distribution unit provided by an embodiment of the present disclosure. Referring to FIG12 , an embodiment of the present disclosure provides a main distribution unit 40, which may be included in a primary base station corresponding to a user equipment UE, including:

[0163] A determination module 41 is configured to determine a secondary carrier to be aggregated according to a secondary cell pre-established list information element in a UE context modification request;

[0164] a sending module 42 configured to send a secondary carrier establishment request to the secondary distribution unit based on the carrier aggregation cooperation relationship between the secondary distribution units corresponding to the secondary carriers to be aggregated, wherein the secondary carrier establishment request includes a mobility restriction list information element in the UE context modification request;

[0165] The configuration module 43 is configured to determine a UE context modification response message based on the secondary carrier establishment success response message corresponding to the secondary carrier establishment request, so as to configure the secondary carrier to be aggregated for the user equipment UE based on the UE context modification response message.

[0166] In an optional implementation, the secondary carrier establishment request also includes: the initial wireless dedicated acceptance resources of the primary carrier corresponding to the primary distribution unit; the secondary carrier establishment success response message includes: the wireless dedicated acceptance resources of the secondary carrier after staggering processing corresponding to the secondary distribution unit.

[0167] In an optional implementation, when there are multiple secondary carriers to be aggregated and there are multiple secondary distribution units corresponding to the secondary carriers to be aggregated, the configuration module is further configured to:

[0168] performing time-domain staggering on the initial wireless dedicated admission resources of the primary carrier corresponding to the primary distribution unit according to the staggered wireless dedicated admission resources of the secondary carrier corresponding to each secondary distribution unit, to obtain the staggered wireless dedicated admission resources of the primary carrier corresponding to the primary distribution unit;

[0169] generating coordinated configuration information according to the wireless dedicated admission resources of the primary carrier after the staggering process corresponding to the primary distribution unit and the wireless dedicated admission resources of the secondary carrier after the staggering process corresponding to each secondary distribution unit, and generating a secondary carrier modification request message according to the coordinated configuration information;

[0170] The secondary carrier modification request message is sent to each secondary distributed unit respectively, and a secondary carrier modification response message returned by each secondary distributed unit is received.

[0171] In an optional implementation, the configuration module is specifically configured to:

[0172] Obtain an NR cell global identifier of a primary carrier corresponding to the primary distribution unit, an NR cell global identifier of a secondary carrier corresponding to each secondary distribution unit, a serving cell index of the primary carrier corresponding to the primary distribution unit, and a secondary cell pre-established list information element corresponding to each secondary distribution unit;

[0173] Generate the coordinated configuration information according to the wireless dedicated admission resources of the primary carrier after staggering corresponding to the primary distribution unit, the wireless dedicated admission resources of the secondary carrier after staggering corresponding to each secondary distribution unit, the NR cell global identifier of the primary carrier corresponding to the primary distribution unit, the NR cell global identifier of the secondary carrier corresponding to each secondary distribution unit, the serving cell index of the primary carrier corresponding to the primary distribution unit, and the secondary cell pre-established list information element corresponding to each secondary distribution unit;

[0174] The collaborative configuration information is used to implement message communication between MAC layers of any two distributed units.

[0175] In an optional implementation, the main distribution unit 40 further includes: a first collaborative configuration module 44;

[0176] The first collaborative configuration module 44 is configured to:

[0177] In response to uplink control information of a user equipment UE, when the information type of the uplink control information is a preset type, determining a primary carrier or a secondary carrier corresponding to the uplink control information of the preset type;

[0178] Determining, according to the primary carrier or secondary carrier corresponding to the uplink control information of the preset type and the coordination configuration information in the secondary carrier modification request message, a secondary distribution unit corresponding to the uplink control information of the preset type;

[0179] The uplink control information of the preset type is forwarded to a secondary distribution unit corresponding to the uplink control information.

[0180] In the fifth aspect, FIG13 is a block diagram of a composition of an auxiliary distribution unit provided by an embodiment of the present disclosure. Referring to FIG13 , an embodiment of the present disclosure provides an auxiliary distribution unit 50, including:

[0181] The receiving module 51 is configured to receive a secondary carrier establishment request including a mobility restriction list information element sent by the primary distribution unit;

[0182] A response module 52 is configured to generate a secondary carrier establishment success response message according to the mobility restriction list information element in the secondary carrier establishment request, and return the secondary carrier establishment success response message to the main distribution unit, so that the main distribution unit obtains a UE context modification response message based on the secondary carrier establishment success response message, so that the secondary carrier to be aggregated is configured for the user equipment UE based on the UE context modification response message.

[0183] In an optional implementation, the auxiliary distribution unit 50 also includes: a matching module 53, which is configured to match the UE subscription information corresponding to the mobility restriction list information element with the network configuration information supported by the auxiliary carrier corresponding to the auxiliary distribution unit, and the response module is specifically used to generate a secondary carrier establishment success response message based on the matching result.

[0184] In an optional implementation, the UE context modification request message further includes: a secondary cell pre-establishment cause value, and the matching module 53 is further configured to:

[0185] Determining the priority of secondary carrier configuration according to the secondary cell pre-establishment cause value;

[0186] The secondary carrier to be aggregated is configured for the user equipment UE according to the priority of the secondary carrier configuration.

[0187] In an optional implementation, the secondary cell pre-establishment cause value is at least one of the following:

[0188] a first-category cause value corresponding to resource congestion on the primary base station side;

[0189] a second-category cause value corresponding to the traffic volume of the user equipment UE;

[0190] a third-category cause value corresponding to a service type of the user equipment UE;

[0191] The fourth category of cause values ​​corresponding to maximizing the estimated cell spectrum efficiency;

[0192] The fifth category of cause values ​​corresponding to signal measurements and the sixth category of cause values ​​corresponding to other causes.

[0193] In an optional implementation, the matching module 53 is specifically configured to:

[0194] Obtaining a user group identifier in the UE subscription information corresponding to the mobility restriction list information element and a user group identifier in the network configuration information supported by the secondary carrier corresponding to the secondary distribution unit;

[0195] Matching the user group identifier in the UE subscription information corresponding to the mobility restriction list information element with the user group identifier in the network configuration information;

[0196] The response module is specifically configured to: generate the secondary carrier establishment success response message according to the successfully matched user group identifier when the matching result indicates that the matching is successful.

[0197] In an optional implementation, the matching module 53 is specifically configured to:

[0198] Determining whether the user equipment UE supports a non-public network NPN according to the UE subscription information, and determining whether the secondary carrier corresponding to the secondary distribution unit belongs to a user group cell of a preset type according to the network configuration information, to obtain a determination result;

[0199] If the judgment result meets the preset condition, obtaining the user group identifier in the UE subscription information corresponding to the mobility restriction list information element and the user group identifier in the network configuration information supported by the secondary carrier corresponding to the secondary distribution unit;

[0200] The preset conditions include: the user equipment UE supports the non-public network NPN, and the secondary carrier corresponding to the secondary distribution unit belongs to a user group cell of a first preset type; or the user equipment UE does not support the non-public network NPN, and the secondary carrier corresponding to the secondary distribution unit belongs to a user group cell of a second preset type.

[0201] In an optional implementation, the response module 52 is specifically configured to:

[0202] Acquire the initial wireless dedicated admission resource of the primary carrier corresponding to the primary distribution unit included in the secondary carrier establishment request;

[0203] performing time-domain staggering on the initial wireless dedicated admission resources of the secondary carrier corresponding to the secondary distribution unit according to the initial wireless dedicated admission resources of the primary carrier corresponding to the primary distribution unit, to obtain the wireless dedicated admission resources of the secondary carrier corresponding to the secondary distribution unit after the staggering;

[0204] A secondary carrier establishment success response message including the wireless dedicated reception resources of the secondary carrier after the staggering process corresponding to the secondary distribution unit is returned to the primary distribution unit.

[0205] In an optional implementation, the auxiliary distribution unit includes: an auxiliary distribution unit corresponding to the secondary carrier to be aggregated; and the response module 52 is further configured to:

[0206] Obtaining the coordination configuration information included in the secondary carrier modification request message of the primary distribution unit;

[0207] Message communication between MAC layers of any two distributed units is achieved according to the collaborative configuration information.

[0208] In an optional implementation, the auxiliary distribution unit 50 further includes a second collaborative configuration module 54, wherein the second collaborative configuration module 54 is configured to:

[0209] In response to uplink control information of a user equipment UE, when the information type of the uplink control information is a preset type, determining a primary carrier or a secondary carrier corresponding to the uplink control information of the preset type;

[0210] Determining, according to the primary carrier or secondary carrier corresponding to the uplink control information of the preset type and the coordinated configuration information, a primary distribution unit or a secondary distribution unit corresponding to the uplink control information of the preset type;

[0211] The uplink control information of the preset type is forwarded to the primary distribution unit or the secondary distribution unit corresponding to the uplink control information of the preset type.

[0212] In a sixth aspect, FIG14 is a block diagram of a main centralized unit provided in an embodiment of the present disclosure. Referring to FIG14 , an embodiment of the present disclosure provides a main centralized unit 60, which may be included in a primary base station corresponding to a user equipment UE, including:

[0213] The sending module 61 is configured to send a UE context modification request message to the primary distribution unit included in the primary base station; wherein the UE context modification request message includes a secondary cell pre-established list information element and a mobility restriction list information element;

[0214] A receiving module 62 is configured to receive a UE context modification response message returned by the primary distribution unit, and configure the secondary carrier to be aggregated for the user equipment UE according to the UE context modification response message;

[0215] The UE context modification response message is generated by the above method.

[0216] The sending module 61 is further configured to: obtain the mobility restriction list information element, and add the mobility restriction list information element to the UE context modification request message, so that the UE context modification request message includes the mobility restriction list information element.

[0217] The specific structure and working principle of each of the above modules can be referred to the description of the corresponding part of the method embodiment, which will not be repeated here.

[0218] In the seventh aspect, FIG15 is a block diagram of a secondary carrier configuration system provided in an embodiment of the present disclosure. Referring to FIG15 , an embodiment of the present disclosure provides a secondary carrier configuration system 70, comprising: the primary distribution unit 40 provided in the fourth aspect, the secondary distribution unit 50 provided in the fifth aspect, and the primary centralized unit 60 provided in the sixth aspect.

[0219] In the eighth aspect, referring to Figure 16, an embodiment of the present disclosure provides an electronic device, which has at least one processor 801; at least one memory 802; and at least one I / O interface 803, connected between the processor 801 and the memory 802; wherein the memory 802 stores at least one computer program that can be executed by the at least one processor 801, and the at least one computer program is executed by the at least one processor 801 so that the at least one processor 801 can execute the auxiliary carrier configuration method provided in any of the above aspects.

[0220] In a ninth aspect, an embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method for configuring the auxiliary carrier provided in any of the above aspects is implemented.

[0221] To facilitate understanding, the specific implementation details of the above embodiment are described in detail below using a specific example.

[0222] FIG17 is a schematic diagram of downlink traffic splitting of a cross-site auxiliary carrier provided in a specific example of the present disclosure.

[0223] According to the 3GPP protocol, carrier aggregation is performed at the data link layer. Based on the optional 2 RAN logical architecture provided in Section 11 of the 3GPP 38.801 protocol, Figure 17 illustrates carrier aggregation data offload at the RLC_H protocol deployment unit in this specific example.

[0224] Referring to Figure 17, RLC_H, RLC_L, MAC, and PHY are the RLC layer protocol deployment unit, MAC layer protocol deployment unit, and PHY layer protocol deployment unit using the 3GPP standard, respectively. The functions of each service layer deployed in the base station are as follows:

[0225] RLC_H: PDU grouping, ARQ and other functions;

[0226] RLC_L: SDU segmentation, PDU header revision, etc.;

[0227] MAC: data frame scheduling and resource allocation, HARQ (Hybrid Automatic Repeat Request) processing, and MAC layer control signaling transmission;

[0228] PHY: wireless signal modulation and demodulation, scheduling and resource allocation;

[0229] RLC PDU stands for Radio Link Control Protocol Data Unit.

[0230] FIG18 is a schematic diagram of establishing a collaborative link provided by a specific example of the present disclosure.

[0231] After each logical station cell is successfully established, the configuration of the cell coordination relationship is triggered for cells that support CA. The DU control plane coordination link management unit triggers the establishment of the coordinated cell relationship used by the UE process control unit; the establishment process is linked to the establishment of the MAC layer coordination link management unit.

[0232] The control plane collaborative link management unit is responsible for managing the control plane collaborative link. After the control plane collaborative link is established, it is mainly used for the source station DU and the target station DU to exchange NR secondary carrier establishment, modification and release messages.

[0233] The control plane coordinated link establishment request message includes the source base station Global gNB ID and the NR CGI of all cells configured to support CA. The control plane coordinated link establishment success response message includes the target base station Global gNB ID and the NR CGI of all cells configured to support CA.

[0234] The MAC layer collaborative link management unit is responsible for establishing collaborative links with the MAC layer protocol deployment unit. The MAC layer collaborative link establishment request message includes the IDs of all carriers supporting Carrier Access Control (CA), the corresponding physical cell IDs, and the NR CGI. The collaborative link establishment success response message sent by the peer end includes the IDs of all carriers configured to support CA, the corresponding physical cell IDs, and the NR CGI.

[0235] Referring to Figure 18 , a UE accesses Pcell 1 and adds secondary carriers scell_1, scell_2, scell_3, and scell_4 as cross-site secondary carriers. DU_1 sends UE-level secondary carrier configuration processing messages to DU_2, DU_3, and DU_4, including UE secondary carrier establishment request and response messages, UE secondary carrier modification request and response messages, and UE secondary carrier reconfiguration completion indication notification messages. The signaling message flow is shown in arrows 1, 2, and 3. Before exchanging UE-level secondary carrier configuration messages, each DU exchanges non-UE-level configuration messages to obtain corresponding coordinated neighboring cell information, including service layer coordinated link establishment request and response messages between DU_1, DU_2, DU_3, and DU_4. In Figure 18, signaling 1 represents the signaling for transmitting various requests or messages between DU_1 (i.e., primary DU) and DU_2 (i.e., secondary DU), signaling 2 represents the signaling for transmitting various requests or messages between DU_1 (i.e., primary DU) and DU_3 (i.e., secondary DU), and signaling 3 represents the signaling for transmitting various requests or messages between DU_1 (i.e., primary DU) and DU_4 (i.e., secondary DU). Correspondingly, signaling 4 represents the signaling for transmitting various requests or messages between DU_2 and DU_3, signaling 5 represents the signaling for transmitting various requests or messages between DU_2 and DU_4, and signaling 6 represents the signaling for transmitting various requests or messages between DU_3 and DU_4.

[0236] After the cross-site secondary carrier configuration is completed, each DU where the cross-site secondary carrier is located sends a secondary carrier activation or deactivation message to DU_1 where the primary carrier is located. MAC layer service coordination scheduling messages are transmitted between the primary DU and the secondary DU, and between the secondary DUs.

[0237] FIG19 is a schematic diagram of a MAC layer downlink data AN feedback message flow deployed in a base station provided in a specific example of the present disclosure.

[0238] 19 , DU_2, DU_3, and DU_4 send downlink data transmission to the UE. After DU_1 receives the UL ACK / NACK feedback message of the terminal UE downlink data, DU_1 distributes the downlink feedback confirmation message corresponding to each secondary carrier to DU_2, DU_3, and DU_4.

[0239] FIG20 is a flowchart of a cross-site secondary carrier establishment configuration process provided by a specific example of the present disclosure. Referring to FIG20 , the process includes the following operations:

[0240] After the UE accesses the gNodeB_1 composed of CU_1 and DU_1, CU_1 sends a UE context modification request message through the F1 interface carrying the secondary cell pre-established list information element and the mobility restriction list information element to DU_1.

[0241] The UE process control unit on the DU_1 side determines that the scell (secondary carrier) in the secondary cell pre-establishment list information element is not within the cell range configured by gNodeB_1, but the gNodeB to which the scell belongs has a CA collaborative relationship with this gNodeB_1. DU_1 sends a Secondary Carrier Establishment Request 1 message to DU_2, where scell_1 and scell_2 are located. The message carries the following information: the Global gNB ID of the primary base station where the UE accesses the primary cell, the Global gNB ID of the secondary base station where the secondary cell is located, the NR CGI of the primary cell, UE secondary carrier related information: the secondary carrier identifier (sCellIndex) within the UE, the NR CGI of the secondary cell requested to add the secondary cell, the Carrier Access Response (CA) type (whether uplink CA is supported), the PhysicalCellGroupConfig information and MAC-CellGroupConfig information of the secondary carrier configured on the cross-site gNB DU_2 side for the UE, the C-RNTI (Cell Radio Network Temporary Identifier), UE capability information and mobility restriction list information, the admission reference resources of scell_1 and scell_2 in DU_2: the UE primary cell dedicated radio admission resource (spCellConfigDedicated information, corresponding to the information element in the 3GPP 38.331 protocol, UE primary carrier dedicated cell configuration), the SRB (Signaling Radio Bearer) and DRB (Data Radio Bearer) of the UE in the secondary carrier. After processing, DU_2 replies with a Secondary Carrier Setup Response 1 message to the UE process control unit that controls DU_1. This message carries the secondary cell dedicated radio admission resources (sCellConfigDedicated information, corresponding to the UE secondary carrier dedicated cell configuration in the 3GPP 38.331 protocol) allocated by the target station for scell_1 and scell_2, as well as the RLC_L layer offload IP addresses allocated by the target station for scell_1 and scell_2.

[0242] The master DU_1 receives a secondary carrier establishment response 1 message (also called a secondary carrier establishment success response message) replied by DU_2.

[0243] DU_1 sends a Secondary Carrier Setup Request 2 message to DU_3 where scell_3 is located. The message carries information including: the Global gNB ID of the primary base station where the UE accesses the primary cell, the Global gNB ID of the secondary base station where the secondary cell is located, the NR CGI of the primary cell, UE secondary carrier related information (including the secondary carrier identifier within the UE, the NR CGI for requesting to add the secondary cell scell, the Carrier Access Control (CA) type (whether uplink CA is supported), the PhysicalCellGroupConfig information and MAC-CellGroupConfig information for configuring the secondary carrier for the UE on the cross-gNB DU_3 side, the C-RNTI, UE capability information and mobility restriction list information, the admission reference resources of scell_3 in DU_3 (including the UE's primary cell dedicated radio admission resources and the radio dedicated admission resources for the admission responses of the secondary cells scell_1 and scell_2), the RLC-BearerConfig information of the UE's SRB and DRB in the secondary cell, and the RLC_H offload IP address of the source DU's primary cell. After processing, DU_3 replies with a secondary carrier establishment response 2 message to the UE process control unit of the master DU_1. The response message 2 carries the UE wireless dedicated admission resources of the secondary cell of scell_3 allocated by the target station and the RLC_L layer offload IP address of scell_3 allocated by the target station.

[0244] DU_3 replies with a secondary carrier establishment response 2 message (also called a secondary carrier establishment success response message) carrying the UE wireless dedicated admission resource configuration of scell_3.

[0245] After receiving the Secondary Carrier Setup Response 2 message from DU_3, the master DU_1 sends a Secondary Carrier Setup Request 3 message to DU_4 where scell_4 is located. The message carries information including: the Global gNB ID of the primary base station where the UE accesses the primary cell, the Global gNB ID of the secondary base station where the secondary cell is located, the NR CGI of the primary cell, UE secondary carrier related information (including the secondary carrier identifier within the UE, the NR CGI for requesting to add the secondary cell scell, the Carrier Access Controller (CA) type (whether uplink CA is supported), the PhysicalCellGroupConfig information and MAC-CellGroupConfig information for configuring the secondary carrier for the UE on the cross-gNB DU_4 side, the C-RNTI, UE capability information and mobility restriction list information, the admission reference resources of scell_4 in DU_4 (including the UE's primary cell dedicated radio admission resources and the radio dedicated admission resources of the admission responses of secondary cells scell_1, scell_2, and scell_3), the RLC-BearerConfig information of the UE's SRB and DRB in the secondary cell, and the RLC_H offload IP address of the source DU's primary carrier. After processing, DU_4 replies with a secondary carrier establishment response 3 message to the UE process control unit of the master control DU_1. The secondary carrier establishment response 3 message carries the UE wireless dedicated admission resources of the secondary cell of scell_4 allocated by the target station and the RLC_L layer offload IP address of scell_4 allocated by the target station.

[0246] DU_4scell_4 replies with a secondary carrier establishment response 3 message carrying the UE wireless dedicated admission resource configuration of scell_4.

[0247] After receiving the UE wireless dedicated reception resource configuration of scell_1, scell_2, scell_3 and scell_4, the master control DU_1 staggers and configures the resources of the primary cell cell_1; at the same time, the RLC offload target IP addresses of the DUs where the other scells are located are notified to the RLC layer deployment module of the master control DU_1 where the primary carrier is located.

[0248] The master DU_1 sends a secondary carrier modification request message to DU_2, DU_3, and DU_4, notifying them of their respective coordination information. Specifically, the master DU_1 sends a secondary carrier modification request 1 to DU_2, a secondary carrier modification request 2 to DU_3, and a secondary carrier modification request 3 to DU_4. Accordingly, DU_2 returns a secondary carrier modification response 1 to the master DU_1, DU_3 returns a secondary carrier modification response 2 to the master DU_1, and DU_4 returns a secondary carrier modification response 3 to the master DU_1. The coordination request message for each scell includes: the dedicated radio admission resource spCellConfigDedicated for the primary carrier of the UE, the dedicated radio admission resource sCellConfigDedicated for all secondary carriers of the UE, the physical cell identifiers of all carriers to be aggregated, the carrier identifiers, the NR cell global identifier of the primary carrier, the NR cell global identifier of each secondary carrier corresponding to the secondary distribution unit, the serving cell index (ServCellIndex according to the 3GPP 38.473 protocol) of the primary carrier corresponding to the primary distribution unit, and the pre-established list of secondary cells corresponding to each secondary distribution unit.

[0249] The master control DU_1 replies to the F1 interface UE context modification response message carrying the cell group configuration information element (3GPP 38.331 protocol cellGroupConfig information element) containing the scell configuration to the CU. The CU sends the RRC reconfiguration message (3GPP 38.331 protocol RRCReconfiguration) to the terminal UE. Subsequently, the RRCReconfigurationComplete message received from the terminal UE completes the configuration addition of the cross-site scell.

[0250] The secondary carrier establishment request message sent by master DU_1 to each DU containing the scell carries the mobility restriction list information passed by CU_1. Upon receipt, each DU uses the user equipment (UE) subscription information in the mobility restriction list combined with the network configuration information supported by each DU's secondary cell to make an admission decision for each scell. If a match is successful, a secondary carrier establishment success response message is returned; if a match fails, a secondary carrier establishment failure response message carrying the NPN network failure cause value is returned. As shown in the figure, master DU_1 sends secondary carrier reconfiguration completion confirmation request 1 to DU_2, secondary carrier reconfiguration completion confirmation request 2 to DU_3, and secondary carrier reconfiguration completion confirmation request 3 to DU_4. Accordingly, DU_2 returns secondary carrier reconfiguration completion confirmation response 1 to master DU_1, DU_3 returns secondary carrier reconfiguration completion confirmation response 2 to master DU_1, and DU_4 returns secondary carrier reconfiguration completion confirmation response 3 to master DU_1.

[0251] In summary, the method and system for configuring a secondary carrier provided by the specific example of the embodiment of the present disclosure have the following beneficial effects:

[0252] (1) By adding a mobility restriction list information element to the F1 interface UE context modification request message, direct communication between DUs can be used to configure cross-site auxiliary carriers, so that the addition and configuration of cross-site auxiliary carriers are adapted to the scenario where the public network and NPN private network coexist, further broadening the application scenarios of this method.

[0253] (2) The invention can quickly add cross-site auxiliary carriers through direct communication technology between DUs, including direct communication between the primary DU and the auxiliary DU and direct communication between the auxiliary DUs. This makes the invention applicable to the addition of multiple cross-site auxiliary carriers in various networking scenarios of CRAN and DRAN, thereby increasing service traffic and significantly improving user experience.

[0254] (3) By deploying the UE process control unit on the DU, direct communication between the UE service process control units between DUs is achieved, making the addition of cross-site auxiliary carriers faster and more efficient. Similarly, the establishment of a MAC layer collaborative link between DUs is conducive to the faster transmission of subsequent internal UE scheduling information in the MAC layer, thereby improving user traffic, and the method can be further expanded to apply to the addition of cross-site auxiliary carriers under various CRAN and DRAN networking modes.

[0255] Among them, the processor is a device with data processing capabilities, including but not limited to the central processing unit (CPU); the memory is a device with data storage capabilities, including but not limited to random access memory (RAM, more specifically such as SDRAM, DDR, etc.), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), and flash memory (FLASH); the I / O interface (read-write interface) is connected between the processor and the memory, which can realize information exchange between the memory and the processor, including but not limited to the data bus (Bus), etc.

[0256] Those skilled in the art will appreciate that all or some of the steps, systems, and functional modules / units in the apparatus disclosed above may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0257] In hardware implementations, the division between functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation.

[0258] Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit (CPU), a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As is well known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, random access memory (RAM, more specifically SDRAM, DDR, etc.), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory (FLASH) or other disk storage; compact disc (CD-ROM), digital versatile disc (DVD) or other optical disc storage; magnetic cassettes, tapes, disk storage or other magnetic storage; any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0259] The present disclosure has disclosed example embodiments, and although specific terms are employed, they are used and should be interpreted only in a general illustrative sense and not for purposes of limitation. In some instances, it will be apparent to those skilled in the art that, unless otherwise expressly indicated, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments. Therefore, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the scope of the present disclosure as set forth in the appended claims.

Claims

1. A method for configuring a secondary carrier, applicable to a primary distribution unit DU included in a primary base station corresponding to a user equipment UE, wherein: The method comprises: Determine the secondary carrier to be aggregated according to the secondary cell pre-established list information element in the UE context modification request; Based on the carrier aggregation coordination relationship between the secondary distribution units corresponding to the secondary carriers to be aggregated, sending a secondary carrier establishment request to the secondary distribution units, wherein the secondary carrier establishment request includes a mobility restriction list information element in the UE context modification request; A UE context modification response message is determined based on a secondary carrier establishment success response message corresponding to the secondary carrier establishment request, so that the secondary carrier to be aggregated is configured for the user equipment UE based on the UE context modification response message.

2. The method according to claim 1, wherein: The secondary carrier establishment request further includes: initial wireless dedicated receiving resources of the primary carrier corresponding to the primary distribution unit; the secondary carrier establishment success response message includes: wireless dedicated receiving resources of the secondary carrier after staggering processing corresponding to the secondary distribution unit.

3. The method according to claim 2, wherein: In the case where the number of the secondary carriers to be aggregated is multiple and the number of secondary distribution units corresponding to the secondary carriers to be aggregated is multiple, before determining the UE context modification response message based on the secondary carrier establishment success response message corresponding to the secondary carrier establishment request, the method further includes: According to the wireless dedicated receiving resources of the secondary carrier after the staggering process corresponding to each secondary distribution unit, the initial wireless dedicated receiving resources of the primary carrier corresponding to the primary distribution unit are subjected to time domain staggering process to obtain the wireless dedicated receiving resources of the primary carrier after the staggering process corresponding to the primary distribution unit; Generate coordination configuration information according to the wireless dedicated receiving resources of the main carrier after staggering corresponding to the main distribution unit and the wireless dedicated receiving resources of the secondary carrier after staggering corresponding to each secondary distribution unit, and generate a secondary carrier modification request message according to the coordination configuration information; The secondary carrier modification request message is sent to each secondary distributed unit respectively, and a secondary carrier modification response message returned by each secondary distributed unit is received.

4. The method according to claim 3, wherein: The generating of the coordinated configuration information according to the wireless dedicated receiving resources of the main carrier after the staggered processing corresponding to the main distribution unit and the wireless dedicated receiving resources of the secondary carrier after the staggered processing corresponding to each secondary distribution unit comprises: Obtain an NR cell global identifier of a primary carrier corresponding to the primary distribution unit, an NR cell global identifier of a secondary carrier corresponding to each secondary distribution unit, a serving cell index of the primary carrier corresponding to the primary distribution unit, and a secondary cell pre-established list information element corresponding to each secondary distribution unit; Generate the collaborative configuration information according to the wireless dedicated admission resources of the staggered main carrier corresponding to the main distribution unit, the wireless dedicated admission resources of the staggered secondary carrier corresponding to each secondary distribution unit, the NR cell global identifier of the main carrier corresponding to the main distribution unit, the NR cell global identifier of the secondary carrier corresponding to each secondary distribution unit, the serving cell index of the main carrier corresponding to the main distribution unit, and the secondary cell pre-established list information element corresponding to each secondary distribution unit; The collaborative configuration information is used to implement message communication between MAC layers of any two distributed units.

5. The method according to claim 3, wherein: After receiving the secondary carrier modification response message returned by each secondary distribution unit, the method further includes: In response to uplink control information of a user equipment UE, when the information type of the uplink control information is a preset type, determining a primary carrier or a secondary carrier corresponding to the uplink control information of the preset type; Determine, according to the primary carrier or the secondary carrier corresponding to the uplink control information of the preset type and the coordinated configuration information in the secondary carrier modification request message, a secondary distribution unit corresponding to the uplink control information of the preset type; The uplink control information of the preset type is forwarded to the auxiliary distribution unit corresponding to the uplink control information.

6. The method according to any one of claims 1 to 5, further comprising: When the main distribution unit receives the data transmission instruction, data transmission is performed with the RLC layer deployment module included in the auxiliary distribution unit according to the communication address of the RLC layer deployment module of the auxiliary carrier.

7. A method for configuring an auxiliary carrier, applicable to an auxiliary distribution unit, wherein: The method comprises: receiving a secondary carrier establishment request including a mobility restriction list information element sent by a primary distribution unit; A secondary carrier establishment success response message is generated according to the mobility restriction list information element in the secondary carrier establishment request, and the secondary carrier establishment success response message is returned to the main distribution unit, so that the main distribution unit obtains a UE context modification response message based on the secondary carrier establishment success response message, and configures the secondary carrier to be aggregated for the user equipment UE based on the UE context modification response message.

8. The method according to claim 7, wherein: The generating a secondary carrier establishment success response message according to the mobility restriction list information element comprises: The UE subscription information corresponding to the mobility restriction list information element is matched with the network configuration information supported by the secondary carrier corresponding to the secondary distribution unit, and a secondary carrier establishment success response message is generated according to the matching result.

9. The method according to claim 8, wherein: The matching of the UE subscription information corresponding to the mobility restriction list information element with the network configuration information supported by the secondary carrier corresponding to the secondary distribution unit, and generating a secondary carrier establishment success response message according to the matching result, includes: Acquire a user group identifier in the UE subscription information corresponding to the mobility restriction list information element and a user group identifier in the network configuration information supported by the secondary carrier corresponding to the secondary distribution unit; Matching the user group identifier in the UE subscription information corresponding to the mobility restriction list information element with the user group identifier in the network configuration information; If the matching result indicates that the matching is successful, the secondary carrier establishment success response message is generated according to the successfully matched user group identifier.

10. The method according to claim 9, wherein: The acquiring of the user group identifier contained in the UE subscription information corresponding to the mobility restriction list information element and the user group identifier in the network configuration information supported by the secondary carrier corresponding to the secondary distribution unit comprises: Determine whether the user equipment UE supports a non-public network NPN according to the UE subscription information, and determine whether the secondary carrier corresponding to the secondary distribution unit belongs to a user group cell of a preset type according to the network configuration information, to obtain a determination result; When the judgment result satisfies the preset condition, obtaining the user group identifier in the UE subscription information corresponding to the mobility restriction list information element and the user group identifier in the network configuration information supported by the secondary carrier corresponding to the secondary distribution unit; The preset conditions include: the user equipment UE supports the non-public network NPN, and the secondary carrier corresponding to the secondary distribution unit belongs to a user group cell of a first preset type; or, the user equipment UE does not support the non-public network NPN, and the secondary carrier corresponding to the secondary distribution unit belongs to a user group cell of a second preset type.

11. The method according to claim 7, wherein: The returning a secondary carrier establishment success response message to the primary distribution unit includes: Acquire the initial wireless dedicated reception resource of the primary carrier corresponding to the primary distribution unit contained in the secondary carrier establishment request; According to the initial wireless dedicated receiving resources of the main carrier corresponding to the main distribution unit, the initial wireless dedicated receiving resources of the secondary carrier corresponding to the secondary distribution unit are subjected to time domain stagger processing to obtain the wireless dedicated receiving resources of the secondary carrier corresponding to the secondary distribution unit after stagger processing; A secondary carrier establishment success response message including the wireless dedicated reception resource of the secondary carrier after the staggered processing corresponding to the secondary distribution unit is returned to the primary distribution unit.

12. The method according to claim 11, wherein: The auxiliary distribution unit includes: an auxiliary distribution unit corresponding to the secondary carrier to be aggregated; after returning to the main distribution unit a secondary carrier establishment success response message containing the wireless dedicated reception resource of the secondary carrier after staggering corresponding to the auxiliary distribution unit, the auxiliary distribution unit also includes: Acquire the coordination configuration information included in the secondary carrier modification request message of the primary distribution unit; Message communication between MAC layers of any two distributed units is achieved according to the collaborative configuration information.

13. The method according to claim 12, wherein: After returning the secondary carrier modification response message to the primary distribution unit, the method further includes: In response to uplink control information of a user equipment UE, when the information type of the uplink control information is a preset type, determining a primary carrier or a secondary carrier corresponding to the uplink control information of the preset type; Determining a primary distribution unit or a secondary distribution unit corresponding to the uplink control information of the preset type according to the primary carrier or the secondary carrier corresponding to the uplink control information of the preset type and the coordinated configuration information; The uplink control information of the preset type is forwarded to the primary distribution unit or the secondary distribution unit corresponding to the uplink control information of the preset type.

14. The method according to any one of claims 7 to 13, further comprising: When the auxiliary distribution unit receives the data transmission instruction, data transmission is performed with the RLC layer deployment module included in the main distribution unit according to the communication address of the RLC layer deployment module of the main carrier.

15. The method according to any one of claims 7 to 13, wherein: The UE context modification request message further includes: a secondary cell pre-establishment cause value, and configuring the secondary carrier to be aggregated for the user equipment UE based on the UE context modification response message includes: Determining the priority of secondary carrier configuration according to the secondary cell pre-establishment cause value; The secondary carrier to be aggregated is configured for the user equipment UE according to the priority of the secondary carrier configuration.

16. The method according to claim 15, wherein: The secondary cell pre-establishment cause value is at least one of the following: a first type of cause value corresponding to resource congestion on the primary base station side; a second type cause value corresponding to the traffic volume of the user equipment UE; a third type cause value corresponding to a service type of the user equipment UE; The fourth category of cause values ​​corresponding to the maximization of the estimated cell spectrum efficiency; The fifth category cause value corresponding to the signal measurement and the sixth category cause value corresponding to other causes.

17. A method for configuring a secondary carrier, applicable to a primary centralized unit included in a primary base station corresponding to a user equipment UE, wherein: The method comprises: Sending a UE context modification request message to a primary distribution unit included in the primary base station; wherein the UE context modification request message includes a secondary cell pre-established list information element and a mobility restriction list information element; receiving a UE context modification response message returned by the main distribution unit, and configuring the secondary carrier to be aggregated for the user equipment UE according to the UE context modification response message; The UE context modification response message is generated by any method described in claims 1-6.

18. The method according to claim 16, wherein: Before sending the UE context modification request message to the main distribution unit included in the main base station, the method further includes: The mobility restriction list information element is obtained, and the mobility restriction list information element is added to the UE context modification request message, so that the UE context modification request message includes the mobility restriction list information element.

19. A main distribution unit, comprising: A determination module, configured to determine the secondary carrier to be aggregated according to the secondary cell pre-established list information element in the UE context modification request; A sending module, configured to send a secondary carrier establishment request to the secondary distribution unit based on the carrier aggregation coordination relationship between the secondary distribution units corresponding to the secondary carrier to be aggregated, wherein the secondary carrier establishment request includes a mobility restriction list information element in the UE context modification request; The configuration module is configured to determine a UE context modification response message based on a secondary carrier establishment success response message corresponding to the secondary carrier establishment request, so as to configure the secondary carrier to be aggregated for the user equipment UE based on the UE context modification response message.

20. An auxiliary distribution unit, comprising: A receiving module, configured to receive a secondary carrier establishment request including a mobility restriction list information element sent by a primary distribution unit; The response module is configured to generate a secondary carrier establishment success response message according to the mobility restriction list information element in the secondary carrier establishment request, and return the secondary carrier establishment success response message to the main distribution unit, so that the main distribution unit obtains a UE context modification response message based on the secondary carrier establishment success response message, so that the secondary carrier to be aggregated is configured for the user equipment UE based on the UE context modification response message.

21. A main centralized unit, comprising: A sending module is configured to send a UE context modification request message to a primary distribution unit included in the primary base station; wherein the UE context modification request message includes a secondary cell pre-established list information element and a mobility restriction list information element; a receiving module, configured to receive a UE context modification response message returned by the main distribution unit, and configure the secondary carrier to be aggregated for the user equipment UE according to the UE context modification response message; The UE context modification response message is generated by any method described in claims 1-6.

22. A system for configuring an auxiliary carrier, comprising: The main distribution unit of claim 19, the auxiliary distribution unit of claim 20, and the main concentration unit of claim 21.

23. An electronic device, comprising a memory and a processor; the memory stores a computer program executable by the processor, and when the computer program is executed by the processor, the method for configuring the auxiliary carrier according to any one of claims 1 to 18 is implemented.

24. A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method for configuring a secondary carrier according to any one of claims 1 to 18.

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