CN103889059B

CN103889059B - Local resource collocation method and equipment

Info

Publication number: CN103889059B
Application number: CN201210564735.8A
Authority: CN
Inventors: 付喆; 张大钧; 赵亚利
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2012-12-21
Filing date: 2012-12-21
Publication date: 2018-01-05
Anticipated expiration: 2032-12-21
Also published as: WO2014094583A1; CN103889059A

Abstract

The embodiment of the invention discloses a kind of local resource collocation method and equipment, it is related to wireless communication field, for the resource for solving the problems, such as how to configure the home cell in the covering overlapping region of multiple macro base stations.In this method, macro base station is the home cell distributing radio resource, the configuration information of Radio Resource is sent into the local node belonging to home cell, local node configures the Radio Resource of the home cell according to the configuration information；Or the Radio Resource of home cell is configured by local node itself.The present invention solves the problems, such as the resource for how configuring the home cell in the covering overlapping region of multiple macro base stations.

Description

Cell resource configuration method and equipment

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a cell resource allocation method and device.

Background

With the rapid development of intelligent terminals and the increasing demand of users for data service rate and capacity, the traditional Macro base station (Macro eNB) single-layer overlay network cannot meet the service demand of people. Therefore, the third Generation standardization organization (3 rd Generation Partnership Project, 3 GPP) introduced a layered networking approach to solve the problem: by arranging some low-power nodes, namely Local base stations (Local eNBs) (including Femto base station (Femto)/micro base station (Pico)/Relay (Relay) and other forms) in small coverage environments such as a hot spot area, a home indoor environment, an office environment and the like, small-range coverage is provided, the effect of cell splitting is obtained, and an operator can provide services with higher data rate and lower cost for users. In order to enhance mobility management or increase peak rate under the condition of hierarchical networking, a terminal may aggregate resources of cells of multiple base stations, and further may support a network architecture with separated bearers, where Radio Resource Connection (RRC) of a User Equipment (UE) is maintained only in a Marco eNB, and a local base station only has functions of data transmission and the like.

A network architecture of an Evolved Universal Radio access network (E-UTRAN) is shown in fig. 1, and the E-UTRAN is composed of base stations (enbs). And the eNB completes the access network function and communicates with the UE through an air interface. There is both a control plane connection and a user plane connection between the UE and the eNB. For each UE attached to the network, it is served by a Mobility Management Entity (MME), which is connected to the eNB using S1-MME interface. The S1-MME interface provides the UE with services to the control plane, including mobility management and bearer management functions.

The Serving gateway (S-GW) is connected with the eNB by adopting an S1-U interface, and for each UE attached to the network, one S-GW provides services for the UE. The S1-U interface provides user plane service for the UE, and user plane data of the UE is transmitted between the S-GW and the eNB through the S1-U bearer.

In existing hierarchical networks, such as that shown in fig. 2, Macro base stations (Macro enbs) provide base coverage, low power Local enbs provide hot spot coverage, there is a data/signaling interface (which may be a wired or wireless interface) between the Local enbs and the Macro enbs under which the UEs may operate. Since the Local eNB has a small cell coverage and a small number of served UEs, the UEs connected to the Local eNB tend to have better quality of service, such as: and a link with higher service rate and higher quality is obtained. Therefore, when a UE connected to the Macro eNB enters the coverage of a Cell (i.e., Small Cell) corresponding to the Local eNB, it may move to the Local eNB to obtain the service provided by the Local eNB; when the UE is far away from the coverage of the cell corresponding to the Local eNB, it needs to be transferred to the cell controlled by the Macro eNB to maintain the wireless connection.

The network architecture shown in fig. 2 may support bearer separation of data. In the overlapping coverage area of the Macro eNB cell and the Local eNB cell, the bearers of the corresponding UEs may be scheduled and transmitted under different base stations. In particular, the following exemplifies a network architecture that enables separation of user plane and control plane. In this way, when the UE is in an area covered by only the Macro eNB cell, the control plane connection and the user plane connection of the UE are both in the Macro eNB; when the UE moves to or near the overlapping coverage area of the macro eNB cell and the Local eNB cell, the UE's user plane bearer (full or partial) connection is transferred to the Local eNB for higher traffic transmission rates; the control plane connection remains at the Macro eNB to reduce the signaling overhead due to frequent handovers.

For a heterogeneous network, there may be a deployment situation where one Small cell is located within the macro coverage of multiple macro base stations, and this deployment may improve the performance of the macro base station edge area and the edge user satisfaction. An example of the deployment is shown in fig. 3 (taking the deployment of a small cell in an overlapping area of two macro base stations as an example).

In summary, under the heterogeneous network architecture, there is a special scenario that a local node (such as a Small cell) with a Small coverage area is shared by multiple macro base stations. In order to support a special scenario that multiple base stations share a local node, how to implement wireless resource configuration management of the local node to enhance the effect of mobility management and satisfaction of a user is a problem to be considered and solved.

Disclosure of Invention

The embodiment of the invention provides a cell resource configuration method and equipment, which are used for solving the problem of how to configure resources of local cells in coverage overlapping areas of a plurality of macro base stations.

A resource allocation method for local cells located in coverage overlapping areas of a plurality of macro base stations comprises the following steps:

the macro base station allocates wireless resources for the local cell;

and the macro base station sends the configuration information of the wireless resources to a local node to which the local cell belongs.

the local node to which the local cell belongs receives configuration information of wireless resources distributed for the local cell from a macro base station;

and the local node configures the wireless resources of the local cell according to the configuration information.

A method of resource management for local cells located within coverage overlap areas of a plurality of macro base stations, the method comprising:

a local node to which the local cell belongs receives a bearer separation request sent by a macro base station, wherein the bearer separation request carries identification information of a terminal and information of a Data Radio Bearer (DRB) to be separated;

and after determining that the local cell can accommodate the DRB of the terminal, the local node returns a bearer separation response to the macro base station, wherein the bearer separation response carries the configuration information of the radio resources allocated to the local cell.

A macro base station, the macro base station being one of a plurality of macro base stations, and local cells existing within coverage overlapping areas of the plurality of macro base stations, the macro base station comprising:

an allocation unit, configured to allocate radio resources to the local cell;

a sending unit, configured to send the configuration information of the radio resource to a local node to which the local cell belongs.

A local node that manages a local cell within coverage overlap areas of a plurality of macro base stations, the local node comprising:

a receiving unit, configured to receive configuration information of radio resources allocated to the local cell from a macro base station;

a configuration unit, configured to configure the radio resource of the local cell according to the configuration information.

a receiving unit, configured to receive a bearer separation request sent by a macro base station, where the bearer separation request carries identification information of a terminal and information of a data radio bearer DRB to be separated;

a response unit, configured to return a bearer separation response to the macro base station after determining that the local cell can accommodate the DRB of the terminal, where the bearer separation response carries configuration information of radio resources allocated to the local cell.

In the first scheme provided in the embodiment of the present invention, in a scenario where a local cell exists in coverage overlapping areas of multiple macro base stations, that is, the local cell is shared by the multiple macro base stations, the macro base station allocates a wireless resource to the local cell, the macro base station sends configuration information of the wireless resource to a local node to which the local cell belongs, and after receiving the configuration information of the wireless resource sent by the macro base station, the local node configures the wireless resource of the local cell according to the configuration information. Therefore, the scheme that the macro base stations sharing the local cell configure the resources for the local cell is achieved, and therefore the problem of how to configure the resources of the local cells in the coverage overlapping area of the macro base stations is solved.

In the second scheme provided in the embodiment of the present invention, in a scenario where a local cell exists in a coverage overlapping area of multiple macro base stations, that is, the local cell is shared by the multiple macro base stations, a local node to which the local cell belongs receives a bearer separation request sent by the macro base stations, where the bearer separation request carries identification information of a terminal and information of a DRB to be separated, and after determining that the local cell can accommodate the DRB, the local node returns a bearer separation response to the macro base stations, where the bearer separation response carries configuration information of radio resources allocated to the local cell and the terminal. Therefore, the scheme of configuring the resources for the local cell by the local node to which the local cell belongs is realized, and the problem of how to configure the resources of the local cells in the coverage overlapping areas of a plurality of macro base stations is solved.

Drawings

FIG. 1 is a diagram of an E-UTRAN network architecture in the prior art;

FIG. 2 is a schematic diagram of a hierarchical network deployment scenario in the prior art;

fig. 3 is a schematic diagram illustrating deployment of Small cells in a coverage overlapping area of a macro base station in a heterogeneous network in the prior art;

fig. 4 is a schematic view of a bearer separation architecture according to an embodiment of the present invention;

fig. 5 is a schematic diagram of another bearer separation architecture according to an embodiment of the present invention;

fig. 6 is a schematic diagram of another bearer separation architecture according to an embodiment of the present invention;

FIG. 7 is a schematic flow chart of a method provided by an embodiment of the present invention;

FIG. 8 is a schematic flow chart of another method provided by the embodiments of the present invention;

FIG. 9 is a schematic flow chart of another method provided by the embodiments of the present invention;

FIG. 10a is a schematic flow chart according to a first embodiment of the present invention;

FIG. 10b is a schematic flow chart of the second embodiment of the present invention;

FIG. 10c is a schematic flow chart of a third embodiment of the present invention;

FIG. 10d is another schematic flow chart of the third embodiment of the present invention;

FIG. 10e is another schematic flow chart of the fourth embodiment of the present invention;

fig. 11 is a schematic structural diagram of a macro base station according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a local node according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of another local node according to an embodiment of the present invention.

Detailed Description

After the UE receives the bearer detach command, the user plane and the control plane of the UE will be detached, and the UE is connected to two enbs at the same time. Specifically, there are the following bearer separation architectures:

first, a bearer separation framework 1;

under the architecture 1, the SRB of the UE is maintained in Marco eNB, and all or part of DRB is transferred to local node LocaleNB/Small cell transmission. As shown in fig. 4, the dotted line interface exists only when the DRB is a partial bearer split.

Second, bearer separation framework 2;

as shown in fig. 5, the main difference between the bearer separation architecture 2 and the architecture 1 is that the local node LocaleNB/Smallcell may have a part of RRC management functions (such as radio resource management or measurement), but the RRC connection is still maintained in Marco eNB. As with architecture 1, DRBs may be transferred in whole or in part to local node transmission.

Third, bearer split architecture 3 as shown in fig. 6, DRB can be transferred in whole or in part to Local eNB/Small cell transmission. Under the framework, the PDCP layer corresponding to the DRB separated from the local node is maintained on the Macro eNB, and the data transmission between the local node and the core network is transferred through the Macro eNB.

In order to solve the problem of how to configure resources of local cells in coverage overlapping areas of a plurality of macro base stations, embodiments of the present invention provide a resource configuration method for local cells located in coverage overlapping areas of a plurality of macro base stations. In the method, the macro base station configures and manages the resources of the local cell.

Referring to fig. 7, an embodiment of the present invention provides a resource management method for a local cell located in coverage overlapping areas of multiple macro base stations, where the method includes the following steps:

step 70: the macro base station allocates wireless resources for the local cell;

step 71: and the macro base station sends the configuration information of the wireless resources to a local node to which the local cell belongs.

When the radio resource includes a common resource, there are two specific embodiments as follows:

first, before the macro base station allocates the radio resource to the local cell in step 70, the macro base station determines whether or not it is a master macro base station among the plurality of macro base stations; correspondingly, in step 70, after receiving the interface establishment request message sent by the local node to which the local cell belongs, if the macro base station is a master macro base station among the plurality of macro base stations, allocating a public resource to the local cell; the specific implementation of step 71 is: and the macro base station returns an interface establishment response message to the local node, wherein the interface establishment response message carries the configuration information of the public resource. Here, the master macro base station is a macro base station for configuring and managing public resources of the local node among the plurality of macro base stations, and the other macro base stations are secondary macro base stations.

Secondly, before the macro base station allocates the radio resources to the local cell in step 70, the macro base station determines whether or not it is a master macro base station among the plurality of macro base stations; correspondingly, in step 70, if the macro base station is a master macro base station among the plurality of macro base stations, the macro base station acquires information of the public resource allocated to the local cell from an operation and maintenance (OAM) entity, and allocates the public resource to the local cell according to the information; the specific implementation of step 71 is: and the macro base station sends the configuration information of the public resources to a local node to which the local cell belongs.

For the two embodiments, after the macro base station allocates the common resource to the local cell, the macro base station may further send the configuration information of the common resource to an auxiliary macro base station of the plurality of macro base stations and/or a terminal in the local cell.

For the two embodiments, after the public resource allocated to the local cell is changed, the macro base station sends the updated configuration information of the public resource to the local node. Further, the macro base station sends the updated configuration information of the public resource to a secondary macro base station in the plurality of macro base stations and/or a terminal in the local cell.

For the two embodiments, the macro base station determines whether the macro base station is a master macro base station among the plurality of macro base stations, and the specific implementation method may be:

the macro base station determines whether the macro base station is a main macro base station according to configuration information issued by the OAM entity, wherein the configuration information indicates the information of the main macro base station; or,

and the master macro base station determines whether the master macro base station is the master macro base station or not by using a drive test technology. For example, the Macro eNB measures a radio signal, and the Macro eNB corresponding to the radio signal with the best quality obtained by the measurement is set as the master Macro eNB.

Specifically, the configuration information of the common resource may include at least one of the following information:

random Access Channel (RACH) or Physical Random Access Channel (PRACH) common configuration information, Physical Downlink Shared Channel (PDSCH) common configuration information, Physical Uplink Shared Channel (PUSCH) common configuration information, physical hybrid automatic repeat request indicator channel (PHICH) configuration information, Physical Uplink Control Channel (PUCCH) common configuration information, Sounding Reference Signal (SRS) common configuration information, antenna configuration information, maximum transmit power (P-Max) information, Time Division Duplex (TDD) physical channel configuration information, and uplink cyclic prefix length information.

When the radio resource includes a dedicated resource of the terminal in the local cell, the specific implementation is as follows:

in step 70, after determining that a Data Radio Bearer (DRB) of the terminal needs to be transferred to a local node to which the local cell belongs and determining that the local cell can accommodate the DRB, the macro base station allocates a dedicated resource in the local cell to the terminal; correspondingly, in step 71, the macro base station sends the configuration information of the dedicated resource to the local node.

Specifically, a method for the macro base station to determine whether the local cell can accommodate the DRB may be as follows:

the macro base station sends a bearing separation request carrying the identification information of the terminal and the information of the DRB to the local node; after receiving the bearer separation response returned by the local node, determining whether the local cell can accommodate the DRB according to the bearer separation response, that is, the bearer separation response carries indication information of whether to accommodate the DRB.

Another method for the macro base station to determine whether the local cell can accommodate the DRB may be as follows:

the macro base station acquires the load information and/or interference information of the local cell, and determines whether the local cell can accept the DRB or not according to the acquired information;

at this time, in step 71, the macro base station sends the configuration information of the dedicated resource to the local node, specifically: after determining that the local cell can accommodate the DRB, the macro base station sends a bearer separation request to the local node, where the bearer separation request carries the identifier information of the terminal, the information of the DRB, and the configuration information of the dedicated resource.

The macro base station obtains the load information and/or the interference information of the local cell, and the specific implementation may be as follows:

the macro base station receives the load information and/or the interference information of the local cell sent by the local node; or,

the macro base station sends an information acquisition request for the local cell to the local node, and receives load information and/or interference information of the local cell returned by the local node; or,

and the macro base station sends an information sharing request for the local cell to other macro base stations in the plurality of macro base stations, and receives load information and/or interference information of the local cell returned by other macro base stations.

Further, after the dedicated resource of the terminal in the local cell changes, the macro base station sends the updated configuration information of the dedicated resource to the local node.

Further, after the macro base station sends the configuration information of the dedicated resource to the local node, the macro base station may send an RRC message to the terminal to notify the terminal to perform a bearer detach operation, where the RRC message carries the configuration information of the dedicated resource.

Specifically, the configuration information of the dedicated resource may include at least one of the following information:

radio Link Control (RLC) configuration information, logical channel identification, logical channel configuration, Medium Access Control (MAC) configuration information, dedicated physical layer configuration information, Random Access Channel (RACH) dedicated configuration information, measurement configuration information.

Referring to fig. 8, an embodiment of the present invention provides a resource allocation method for a local cell located in coverage overlapping areas of a plurality of macro base stations, where the method includes the following steps:

step 80: a local node to which the local cell belongs receives configuration information of wireless resources distributed for the local cell from a macro base station;

step 81: and the local node configures the wireless resources of the local cell according to the configuration information.

When the radio resource includes a common resource, the specific implementation is as follows:

before the local node receives the configuration information of the radio resources allocated to the local cell from the macro base station in step 80, the local node sends an interface establishment request message to the macro base station; the macro base station is a master macro base station of the plurality of macro base stations;

accordingly, the specific implementation of step 80 is: and the local node receives an interface establishment response message returned by the main macro base station, wherein the interface establishment response message carries the configuration information of the public resource.

Further, after the local node receives the configuration information of the common resource, the configuration information of the common resource is sent to a secondary macro base station in the plurality of macro base stations.

Specifically, the configuration information of the common resource includes at least one of the following information:

RACH or PRACH public configuration information, PDSCH public configuration information, PUSCH public configuration information, PHICH configuration information, PUCCH public configuration information, SRS public configuration information, antenna configuration information, P-Max information, TDD physical channel configuration information, and uplink cyclic prefix length information.

When the radio resource includes a dedicated resource of the terminal in the local cell, the following two specific embodiments may be implemented:

first, before the local node receives the configuration information of the radio resource allocated to the terminal in the local cell from the macro base station in step 80, the local node receives a bearer separation request carrying the identification information of the terminal and the information of the DRB sent by the macro base station, determines whether the DRB can be admitted, and returns a bearer separation response to the macro base station according to the determination result.

Secondly, the step 80 is implemented as follows: and the local node receives a bearer separation request sent by the macro base station, wherein the bearer separation request carries the identification information of the terminal, the information of the DRB and the configuration information of the dedicated resource.

In the method, the local node can periodically send the load information and/or the interference information of the local cell to the macro base station; or,

when the load and/or interference condition of the local cell meets the set condition, the local node sends the load information and/or interference information of the local cell to the macro base station; or,

after receiving an information acquisition request for the local cell sent by the macro base station, the local node sends load information and/or interference information of the local cell to the macro base station.

Specifically, the configuration information of the dedicated resource includes at least one of the following information:

RLC configuration information, logical channel identification, logical channel configuration, MAC configuration information, dedicated physical layer configuration information, RACH dedicated configuration information, measurement configuration information.

For the two embodiments, after the local node receives the configuration information of the radio resource allocated to the local cell from the macro base station, the local node may send an RRC message to the terminal in the local cell, where the RRC message carries the configuration information of the radio resource.

Preferably, after the local node receives the configuration information of the radio resource allocated to the local cell from the macro base station in step 80, the local node receives the updated configuration information of the radio resource from the macro base station, and reconfigures the radio resource of the local cell according to the updated configuration information of the radio resource.

In order to solve the problem of how to configure resources of local cells in coverage overlapping areas of a plurality of macro base stations, an embodiment of the present invention provides another resource configuration method for local cells located in coverage overlapping areas of a plurality of macro base stations. In the method, the local node configures and manages the resources of the local cell.

Referring to fig. 9, another resource allocation method for local cells located in coverage overlapping areas of multiple macro base stations according to an embodiment of the present invention includes the following steps:

step 90: a local node to which a local cell belongs receives a bearer separation request sent by a macro base station, wherein the bearer separation request carries identification information of a terminal and information of a DRB (distributed radio service) to be separated;

step 91: and after determining that the local cell can accommodate the DRB of the terminal, the local node returns a bearer separation response to the macro base station, wherein the bearer separation response carries the configuration information of the radio resources allocated to the local cell.

Specifically, when the radio resource includes a common resource, the method for the local node to allocate the common resource to the local cell in step 90 may be:

the local node acquires the information of the public resource configured for the local cell from the OAM entity and distributes the public resource to the local cell; or,

and the local node allocates the public resource for the local cell according to the local coverage and/or the network deployment scene. For example, the local node configures the common resource for the local cell according to the distance between the base stations, the coverage area of the local cell, the received signal strength of the adjacent base stations, and the like.

the method comprises the following steps of channel RACH or PRACH public configuration information, PDSCH public configuration information, PUSCH public configuration information, PHICH configuration information, PUCCH public configuration information, SRS public configuration information, antenna configuration information, P-Max information, TDD physical channel configuration information and uplink cyclic prefix length information.

When the radio resource includes a dedicated resource of the terminal in the local cell, the configuration information of the dedicated resource includes at least one of the following information:

Further, after the wireless resource of the terminal in the local cell changes, the local node sends the updated configuration information of the wireless resource to some or all of the macro base stations.

Further, the local node also sends an RRC message to the terminal in the local cell, where the RRC message carries the configuration information of the radio resource.

The invention is illustrated below with reference to specific examples:

the first embodiment is as follows:

in this embodiment, common resources of local cells in coverage overlapping areas of multiple Macro enbs are configured and managed by the Macro enbs, and hereinafter, only the local cell is deployed in the coverage overlapping areas of two Macro enbs as an example, but the method is also applicable to a scenario where multiple Macro enbs (e.g., 3, 4, or more Macro enbs) share a local cell.

The common resources of the local cell may be configured and managed by one of the Macro enbs covering the local cell, which may be referred to as a Macro eNB and the other Macro enbs as secondary Macro enbs. The master Macro eNB may be determined using one of two methods: firstly, determining a master Macro eNB by an OAM entity and informing information of the master Macro eNB to each Macro eNB in a coverage overlapping area; further, in the process of establishing the M-L interface between the local node and any Macro eNB, the OAM entity may notify the local node of information such as an IP address of the master Macro eNB, so that the local node may establish the M-L interface with the master Macro eNB; the OAM may also notify the node types (being local nodes or Macro enbs) of multiple Macro enbs that share each local cell to the local node, or in the process of establishing an interface between the nodes, the node types (being local nodes or Macro enbs) of the local node are notified to the opposite node by both nodes; second, the Macro eNB determines the master Macro eNB itself, i.e.: each Macro eNB determines which Macro eNB is the main Macro eNB according to a drive test technology, for example, each Macro eNB measures wireless signals, the Macro eNB corresponding to the wireless signal with the best quality obtained through measurement is used as the main Macro eNB, and other Macro eNBs are auxiliary Macro eNBs; the auxiliary Macro eNB acquires the IP address of the main Macro eNB from the OAM entity, and in the process of establishing the M-L interface between the auxiliary Macro eNB and the local node, the auxiliary Macro eNB informs the local node of the information such as the IP address of the main Macro eNB and the like so as to be used for establishing the M-L interface between the local node and the main Macro eNB; alternatively, the auxiliary Macro eNB may also obtain the IP address of the master Macro eNB from a domain name resolution system (DNS), and notify the local node of information such as the IP address of the master Macro eNB during the process of establishing the M-L interface with the local node. The deployment of the Macro eNB of the local node and the local cell sharing the local node (including the node type information) is informed by the OAM entity to each local node or Macro eNB involved.

After the local node is started or deployed, the local node establishes an M-L interface with the two Macro enbs respectively, that is, the local node sends an M-L interface establishment request to the Macro enbs, where the request includes a logical cell list that the local node can establish, such as an identifier of a local cell. And after receiving the M-L interface establishment request message, the master Macro eNB configures the public resource corresponding to the local cell and sends the configuration information of the public resource to the local node when sending an M-L interface establishment response message to the local node. After receiving the M-L interface establishment response message of the master Macro eNB, the local node completes the configuration of the public resources of the local cell according to the received configuration information of the public resources and can send a public wireless resource configuration completion message to the master Macro eNB. Further, the master Macro eNB may send the cell identifier of the local cell and the configuration information of all or part of the common resources of the local cell to the slave Macro eNB simultaneously or in a subsequent handover process; or, in the process of establishing the M-L interface between the local node and the auxiliary Macro eNB, the local node sends the configuration information of all or part of common resources of the local cell to the auxiliary Macro eNB. In addition, the configuration information of the public resource of the local node can also be directly acquired from the OAM entity by the master Macro eNB, and then the configuration information of the public resource is sent to the local node and further sent to the auxiliary Macro eNB.

Specifically, the configuration information of the common resource of the local cell configured and managed by the master Macro eNB includes: RACH/PRACH public configuration information, PDSCH public configuration information, PUSCH public configuration information, PHICH configuration information, PUCCH public configuration information, SRS public configuration information, antenna configuration information, P-Max (maximum transmit power), TDD physical channel configuration information, uplink cyclic prefix length and the like. The EUTRAN Cell Global Identity (ECGI) consists of the identity of the master Macro eNB, so that information from other nodes is routed via the core network to the master Macro eNB, and if the information is a handover message for which the target base station is a secondary Macro eNB, it can be passed to the secondary Macro eNB via the X2 interface of the master Macro eNB and the secondary Macro eNB, which then establishes a signaling connection with the core network. The configuration information of the common resource of the local node is notified to the UE by the Macro eNB maintaining the current Radio Resource Control (RRC) connection of the UE during handover, bearer separation, and the like.

And when the configuration of the public resource of the local node is changed, the master Macro eNB informs the updated configuration information of the public resource to the local node. Further, the master Macro eNB may simultaneously notify the secondary Macro enbs of the updated configuration information of the common resources. After receiving the updated configuration information of the public resource sent by the master Macro eNB, the local node reconfigures the public resource of the local cell according to the configuration information, and further can send a public wireless resource configuration completion message to the master Macro eNB. If the local node does not have RRC reconfiguration or similar functions (e.g., under bearer split architecture), the updated configuration information of the common resource is notified to the UE by the Macro eNB that maintains the current RRC connection of the UE.

The specific flow is shown in fig. 10 a:

step 1: the local node sends an interface establishment request message to the master Macro eNB;

step 2: the master Macro eNB allocates public resources for local cells of the local nodes in the coverage overlapping area;

and step 3: the master Macro eNB returns an interface establishment response message to the local node, wherein the interface establishment response message carries the configuration information of the public resources of the local cell;

and 4, step 4: the local node sends an interface establishment request message to the auxiliary Macro eNB;

and 5: the secondary Macro eNB returns an interface setup response message to the local node,

step 6: the master Macro eNB sends configuration information of common resources of the local cell to the slave Macro eNB.

Example two:

in this embodiment, common resources of Local cells in coverage overlapping areas of multiple Macro enbs are configured and managed by a Local node, that is, a Local eNB, and hereinafter, only the Local cell is deployed in the coverage overlapping areas of two Macro enbs as an example, but the method is also applicable to a scenario where multiple Macro enbs (for example, 3, 4, or more Macro enbs) share a Local cell.

The public resource of the local cell can be configured by the local node (the local cell can allocate the public resource after the local node is started, and can also reallocate the public resource after receiving a bearing separation command (the method is particularly suitable for a scene that the local node cannot work independently)), and the configuration information of the public resource is sent to the corresponding macro base station in the processes of bearing separation and the like; specifically, the local node may obtain configuration information of the public resource of the local cell from the OAM entity, and then configure the public resource of the local cell according to the configuration information, or the local node configures the public resource of the local cell according to factors such as coverage or deployment scenario of the local cell, and then sends the configuration information of the public resource to the corresponding macro base station in the processes of bearer separation, and the like. When the common resource of the local cell changes, the local node may notify the updated configuration information of the common resource to a part (for example, a macro base station currently implementing bearer separation together with the local node) or all macro base stations in the coverage overlapping area through the M-L interface. If the local node does not have RRC reconfiguration or similar functionality (e.g., under a bearer split architecture), the updated configuration information of the common resource may be notified to the UE by the macro base station that maintains the current RRC connection of the UE.

The specific flow is shown in fig. 10 b:

step 1: the Macro eNB1 sends a bearer separation request to the local node, wherein the bearer separation request carries the identification information of the terminal and the information of the DRB of the terminal to be separated;

step 2: after determining that a local cell in a coverage overlapping area can accept the DRB, the local node allocates public resources for the local cell;

and step 3: the local node returns a bearer separation response to the Macro eNB1, wherein the bearer separation response carries the configuration information of the radio resources allocated to the local cell;

and 4, step 4: the Macro eNB2 sends a bearer separation request to the local node, wherein the bearer separation request carries the identification information of the terminal and the information of the DRB of the terminal to be separated;

and 5: the local node returns a bearer detach response to the Macro eNB2, where the bearer detach response carries configuration information of the radio resources allocated for the local cell.

Example three:

in this embodiment, the dedicated resources of the local cell of the terminal in the coverage overlapping area of the multiple Macro enbs are configured and managed by the Macro enbs, and hereinafter, only the local cell is deployed in the coverage overlapping area of two Macro enbs as an example, but the method is also applicable to a scenario where multiple Macro enbs (e.g., 3, 4, or more Macro enbs) share the local cell.

One implementation is as follows: when the Macro eNB decides to execute the bearer separation with the local node, the Macro eNB sends a bearer separation request message to the local node, wherein the bearer separation request message at least comprises the identification information of the UE, the service quality (QoS) parameter of the DRB of the UE to be separated, the partial capability of the UE and other information. And the local node executes admission control on the DRB of the UE according to the information such as the current load, the interference and the like, and replies the admissible DRB information, the identification of the available local cell and the like to the Macro eNB. Configuring the dedicated resources of the UE in the local cell by the Macro eNB, wherein the configuration information of the dedicated resources comprises: RLC configuration information (including parameter information such as uplink and downlink Acknowledged Mode (AM)/Unacknowledged Mode (UM)), logical channel identifier, logical channel configuration information (including parameter information such as priority, Priority Bit Rate (PBR)/token Bucket Size Duration (BSD)), MAC configuration information (including parameter information such as Buffer Status Report (BSR)/Power Headroom Report (PHR)/Discontinuous Reception (DRX)), dedicated physical layer configuration information (including PDSCH dedicated configuration, PUCCH dedicated configuration, PUSCH dedicated configuration, uplink power control dedicated configuration, SRS uplink dedicated configuration, Channel Quality Indication (CQI) report configuration, Transmission Power Control (TPC) -PDCCH configuration, and RACH configuration information (including random access Preamble (Preamble) index, random access channel (Mask) index), Measurement configuration information, etc. The Macro eNB sends the configuration information of the special resource of the UE to the local node, the local node completes the configuration of the special resource of the UE in the local cell according to the received configuration information, and further can inform the Macro eNB of the completion of the configuration of the special resource; and the Macro eNB sends an RRC reconfiguration message to inform the UE of executing the bearer separation operation, and informs the UE of the configuration information of the special resource of the UE in the local cell, and the UE completes the configuration of the special resource of the local cell and informs the Macro eNB of completing the bearer separation after realizing the synchronization with the local node. Optionally, after completing synchronization with the UE, the local node may send a bearer activation indication message to the Macro eNB.

The specific flow is shown in fig. 10 c:

step 1: after determining that the DRB of the terminal needs to be transferred to the local node, the Macro eNB1 sends a bearer detach request to the local node, where the bearer detach request carries identification information of the terminal and information of the DRB of the terminal that needs to be detached;

step 2: the local node performs admission control, namely, determines whether the DRB of the terminal can be admitted;

and step 3: the local node returns a bearer separation confirmation response to the Macro eNB1, wherein the bearer separation confirmation response carries the DRB information capable of being admitted and the identification information of the local cell admitting the DRB;

and 4, step 4: after receiving the bearer separation confirmation response, the Macro eNB1 allocates dedicated resources in the local cell to the terminal;

and 5: the Macro eNB1 sends configuration information of dedicated resources of the terminal in the local cell to the local node;

step 6: and after the local node completes the configuration of the dedicated resources according to the configuration information, the local node returns a UE dedicated resource configuration completion message to the Macro eNB 1.

The other realization mode is as follows: admission control in the bearer detachment process is performed by the Macro eNB. The Macro eNB performs admission control according to information such as QoS parameters of DRBs, load of local nodes, and interference, which are separated as required. The method for acquiring the information such as interference, load and the like of the local cell of the local node by the Macro eNB can adopt the following four modes:

mode 1: the local node sends information such as interference, load and the like of the local cell to each macro base station sharing the local cell at regular time;

mode 2: when the interference and load conditions of the local cell meet certain conditions, the local node sends the interference and load information of the local cell to each macro base station sharing the local cell;

mode 3: when the macro base station judges that the bearing separation between the macro base station and a local node needs to be executed for a certain UE, the macro base station requests the current interference and load information of a local cell to the local node;

mode 4: when the local node is a node which does not work independently, and when the macro base station judges that the load separation between the local node and a certain UE needs to be executed, the macro base station requests the interference and the load information of the local cell from other macro base stations sharing the local cell.

And if the admission control result is that the local cell of the local node can admit the DRB of the UE needing to be separated, the Macro eNB configures the dedicated resource of the UE in the local cell and sends a bearer separation request message to the local node, wherein the bearer separation request message at least comprises the identification information of the UE, the DRB information needing to be separated, the cell identification of the local cell, the partial capability of the UE, the configuration information of the dedicated resource of the UE in the local cell and the like. The local node completes the configuration of the special resource for the UE according to the configuration information sent by the Macro eNB, and further can inform the Macro eNB of the completion of the configuration of the special resource; further, the local node may optimize the configuration information of the dedicated resources sent by the Macro eNB, and notify the Macro eNB of the optimized configuration information of the dedicated resources when notifying that the configuration of the dedicated resources of the Macro eNB is completed. And the Macro eNB sends an RRC reconfiguration message to inform the UE of executing the bearer separation operation, and informs the UE of the final configuration information of the special resources, the UE completes the configuration of the special resources, and the Macro eNB is informed of the completion of the bearer separation after the synchronization with the local node is realized. Optionally, after completing synchronization with the UE, the local node may send a bearer activation indication message to the Macro eNB.

The specific flow is shown in fig. 10 d:

step 1: after determining that the DRB of the terminal needs to be transferred to the local node, the Macro eNB1 determines whether the local cell of the local node can accommodate the DRB according to the load information and/or the interference information of the local cell of the local node; after determining that the DRB can be accommodated, allocating dedicated resources in the local cell for the terminal;

step 2: the Macro eNB1 sends a bearer separation request to the local node, wherein the bearer separation request carries the identification information of the terminal, the information of the DRB of the terminal to be separated and the configuration information of the dedicated resource of the terminal in the local cell;

and step 3: after receiving the bearer separation request, the local node completes the configuration of the dedicated resources of the terminal in the local cell according to the configuration information;

and 4, step 4: the local node returns a bearer detach confirm response to the Macro eNB1 to inform the terminal that the dedicated resource configuration is complete.

And under the bearing separation state, when the configuration information of the dedicated resources of the UE under the local node needs to be changed, the Macro eNB informs the updated configuration information of the dedicated resources to the local node. The updated configuration information of the dedicated resources can be notified to the UE by the local node through RRC signaling; if the local node does not have the RRC reconfiguration or similar function, the UE is notified of the updated configuration information of the dedicated resource by the macro base station that maintains the current RRC connection of the UE.

In addition, in the bearer split state, the local node completes L2 measurement collection of the UE, and sends L2 measurement information to the macro base station through the M-L interface. Specifically, the corresponding L2 measurement information is sent to the corresponding macro base station; or all L2 measurement information is sent to all macro base stations sharing the local cell.

Example four:

in this embodiment, the dedicated resources of the local cell of the terminal in the coverage overlapping area of the multiple Macro enbs are configured and managed by the local node, and hereinafter, only the local cell is deployed in the coverage overlapping area of two Macro enbs as an example, but the method is also applicable to a scenario where multiple Macro enbs (e.g., 3, 4, or more Macro enbs) share the local cell.

When the Macro eNB decides to execute the bearer separation with the local node, the Macro eNB sends a bearer separation request message to the local node, wherein the bearer separation request message at least comprises the identification of the UE, the QoS parameter of the DRB to be separated, the partial capability of the UE and other information. And the local node executes admission control according to the current load, interference and other information of the local cell. If the local cell can successfully accept part or all of the DRBs, the local node configures dedicated resources of the UE in the local cell, RLC configuration information (including parameter information such as uplink and downlink Acknowledged Mode (AM)/Unacknowledged Mode (UM)), logical channel identifier, logical channel configuration information (including parameter information such as priority and PBR/BSD), MAC configuration information (including parameter information such as BSR/PHR/DRX), dedicated physical layer configuration information (including PDSCH dedicated configuration, PUCCH dedicated configuration, PUSCH dedicated configuration, uplink power control dedicated configuration, SRS uplink dedicated configuration, Channel Quality Indication (CQI) reporting configuration, Transmission Power Control (TPC) -PDCCH configuration, and the like), RACH dedicated configuration information (including random access Preamble (Preamble) index, random access channel (Mask) index), Measurement configuration information, etc. For the measurement configuration information, the measurement configuration information may be configured by a local node or configured by a master Macro eNB or a Macro eNB maintaining RRC connection of the UE; subsequently, when the measurement configuration information is changed, the updated information may be exchanged with each of the other Macro enbs.

The local node sends the identifier of the UE, the receivable DRB information, the identifier of the local cell which can receive the DRB, the configuration information of the special resource of the UE and the like to the macro eNB through a bearer separation confirmation response message. And the Macro eNB sends an RRC reconfiguration message to the UE to inform the UE of executing the bearer separation operation, and informs the UE of the configuration information of the dedicated resources, the UE completes the configuration of the dedicated resources, and the Macro eNB is informed of completing the bearer separation after the synchronization with the local node is realized. Optionally, after completing synchronization with the UE, the local node may send a bearer activation indication message to the Macro eNB.

The specific flow is shown in fig. 10 e:

step 2: the local node performs admission control, that is, determines whether the DRB of the terminal can be admitted, and configures dedicated resources in a local cell capable of admitting the DRB for the terminal after determining that the DRB can be admitted;

and step 3: the local node returns a bearer separation confirmation response to the Macro eNB1, wherein the bearer separation confirmation response carries the configuration information of the dedicated resources of the terminal in the local cell;

and 4, step 4: after receiving the bearer separation confirmation response, the Macro eNB1 sends an RRC reconfiguration message to the UE to notify the UE to perform bearer separation operation, and notifies the UE of the configuration information of the dedicated resources of the terminal in the local cell through the notification of the terminal in the local cell, so that the UE completes configuration of the dedicated resources.

Referring to fig. 11, an embodiment of the present invention provides a macro base station, where the macro base station is one of multiple macro base stations, and local cells exist in coverage overlapping areas of the multiple macro base stations, and the macro base station includes:

an allocating unit 110, configured to allocate radio resources for the local cell;

a sending unit 111, configured to send the configuration information of the radio resource to a local node to which the local cell belongs.

Further, the macro base station further includes:

a first determining unit 112, configured to determine whether a local macro base station is a primary macro base station of the plurality of macro base stations when the wireless resource includes a common resource;

the allocation unit 110 is configured to: after receiving an interface establishment request message sent by a local node to which the local cell belongs, if the local macro base station is a main macro base station in the plurality of macro base stations, allocating public resources to the local cell;

the sending unit 111 is configured to: and returning an interface establishment response message to the local node, wherein the interface establishment response message carries the configuration information of the public resource.

Further, the macro base station further includes:

a second determining unit 113, configured to determine whether a local macro base station is a master macro base station among the plurality of macro base stations when the radio resource includes a common resource;

the allocation unit 110 is configured to: and when the macro base station is a main macro base station in the macro base stations, acquiring the information of the public resources allocated to the local cell from the operation and maintenance OAM entity, and allocating the public resources to the local cell according to the information.

Further, the sending unit 111 is further configured to: and sending the configuration information of the public resources to a secondary macro base station in the plurality of macro base stations and/or a terminal in the local cell.

Further, the macro base station further includes:

a first updating unit 114, configured to send the updated configuration information of the common resource to the local node after the common resource allocated to the local cell changes.

Further, the first updating unit 114 is further configured to:

and sending the updated configuration information of the public resources to a secondary macro base station in the plurality of macro base stations and/or a terminal in the local cell.

Further, the first determining unit 112 or the second determining unit 113 is configured to:

determining whether the macro base station is a main macro base station or not according to the configuration information issued by the OAM entity, or,

and determining whether the macro base station is a main macro base station or not by using a drive test technology.

Further, the configuration information of the common resource includes at least one of the following information:

the method comprises the following steps of random access channel RACH or physical random access channel PRACH public configuration information, physical downlink shared channel PDSCH public configuration information, physical uplink shared channel PUSCH public configuration information, physical hybrid automatic repeat request indicator channel PHICH configuration information, physical uplink control channel PUCCH public configuration information, sounding reference signal SRS public configuration information, antenna configuration information, maximum transmitting power P-Max information, time division duplex TDD physical channel configuration information and uplink cyclic prefix length information.

Further, the allocating unit 110 is configured to:

when the radio resources comprise dedicated resources of the terminal in the local cell, after determining that the Data Radio Bearer (DRB) of the terminal needs to be transferred to a local node to which the local cell belongs and determining that the local cell can accept the DRB, allocating the dedicated resources in the local cell to the terminal;

the sending unit 111 is configured to send the configuration information of the dedicated resource to the local node.

Further, the allocating unit 110 is configured to: determining whether the local cell can accommodate the DRB according to the following method:

sending a bearer separation request carrying the identification information of the terminal and the information of the DRB to the local node; and after receiving the bearer separation response returned by the local node, determining whether the local cell can accept the DRB according to the bearer separation response.

acquiring load information and/or interference information of the local cell, and determining whether the local cell can accept the DRB according to the acquired information;

the sending unit 111 is configured to:

and sending a bearer separation request to the local node, wherein the bearer separation request carries the identification information of the terminal, the information of the DRB and the configuration information of the dedicated resource.

Further, the allocating unit 110 is configured to: acquiring the load information and/or the interference information of the local cell according to the following method:

receiving load information and/or interference information of the local cell sent by the local node; or,

sending an information acquisition request for the local cell to the local node, and receiving load information and/or interference information of the local cell returned by the local node; or,

and sending an information sharing request for the local cell to other macro base stations in the plurality of macro base stations, and receiving load information and/or interference information of the local cell returned by the other macro base stations.

Further, the macro base station further includes:

a second updating unit 115, configured to send the updated configuration information of the dedicated resource to the local node after the dedicated resource of the terminal in the local cell changes.

Further, the sending unit 111 is further configured to:

and after the configuration information of the dedicated resources is sent to the local node, sending an RRC message to the terminal, wherein the RRC message carries the configuration information of the dedicated resources.

Further, the configuration information of the dedicated resource includes at least one of the following information:

radio Link Control (RLC) configuration information, a logical channel identifier, logical channel configuration, Media Access Control (MAC) configuration information, proprietary physical layer configuration information, Random Access Channel (RACH) proprietary configuration information and measurement configuration information.

Referring to fig. 12, an embodiment of the present invention further provides a local node, where a local cell managed by the local node is located in coverage overlapping areas of multiple macro base stations, and the local node includes:

a receiving unit 120, configured to receive configuration information of radio resources allocated to the local cell from a macro base station;

a configuring unit 121, configured to configure radio resources of the local cell according to the configuration information.

Further, the local node further includes:

a sending unit 122, configured to send an interface establishment request message to the macro base station before the receiving unit receives configuration information of the radio resource allocated to the local cell from the macro base station when the radio resource includes a common resource; the macro base station is a master macro base station of the plurality of macro base stations;

the receiving unit 120 is configured to: and receiving an interface establishment response message returned by the macro base station, wherein the interface establishment response message carries the configuration information of the public resource.

Further, the sending unit 122 is further configured to:

and after the receiving unit receives the configuration information of the public resource, sending the configuration information of the public resource to a secondary macro base station in the plurality of macro base stations.

Further, the local node further includes:

a processing unit 123, configured to receive, when the radio resource includes a dedicated resource of the terminal in the local cell, a bearer separation request that is sent by the macro base station and carries the identifier information of the terminal and the information of the DRB before the receiving unit receives configuration information of the radio resource allocated to the local cell for the terminal and sent by the macro base station, determine whether the DRB can be admitted, and return a bearer separation response to the macro base station according to a determination result.

Further, the receiving unit 120 is configured to:

and when the wireless resources comprise the dedicated resources of the terminal in the local cell, receiving a bearer separation request sent by the macro base station, wherein the bearer separation request carries the identification information of the terminal, the information of the DRB and the configuration information of the dedicated resources.

Further, the local node further includes:

a reporting unit 124, configured to periodically send load information and/or interference information of the local cell to the macro base station; or,

when the load and/or interference condition of the local cell meets a set condition, sending the load information and/or interference information of the local cell to the macro base station; or,

and after receiving an information acquisition request for the local cell sent by the macro base station, sending load information and/or interference information of the local cell to the macro base station.

Further, the local node further includes:

a notifying unit 125, configured to send, after the receiving unit receives the configuration information of the radio resource allocated to the local cell from the macro base station, an RRC message to the terminal in the local cell, where the RRC message carries the configuration information of the radio resource.

Further, the local node further includes:

an updating unit 126, configured to receive the updated configuration information of the radio resource sent by the macro base station after the receiving unit receives the configuration information of the radio resource allocated to the local cell sent by the macro base station, and reconfigure the radio resource of the local cell according to the updated configuration information of the radio resource.

Referring to fig. 13, an embodiment of the present invention further provides a local node, where a local cell managed by the local node is located in coverage overlapping areas of multiple macro base stations, and the local node includes:

a receiving unit 130, configured to receive a bearer separation request sent by a macro base station, where the bearer separation request carries identification information of a terminal and information of a data radio bearer DRB to be separated;

a responding unit 131, configured to return a bearer detach response to the macro base station after determining that the local cell can accommodate the DRB of the terminal, where the bearer detach response carries configuration information of radio resources allocated to the local cell.

Further, the local node further includes:

an allocating unit 132, configured to, when the radio resource includes a common resource, acquire, from an OAM entity, information of the common resource configured for the local cell, and allocate the common resource to the local cell; or,

and allocating common resources for the local cells according to local coverage and/or network deployment scenes.

Further, the radio resource includes a dedicated resource of the terminal in the local cell.

Further, the local node further includes:

an updating unit 133, configured to send the updated configuration information of the radio resource to some or all of the macro base stations after the radio resource of the terminal in the local cell changes.

Further, the local node further includes:

a notifying unit 134, configured to send an RRC message to the terminal in the local cell, where the RRC message carries the configuration information of the radio resource.

In conclusion, the beneficial effects of the invention include:

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A resource allocation method for local cells located in coverage overlapping areas of a plurality of macro base stations is characterized by comprising the following steps:

after determining that the Data Radio Bearer (DRB) of the terminal needs to be transferred to a local node to which a local cell belongs and determining that the local cell can accept the DRB, the macro base station allocates a dedicated resource in the local cell for the terminal;

and the macro base station sends the configuration information of the special resources to the local node.

2. The method of claim 1, wherein the method for the macro base station to determine whether the local cell can accommodate the DRB comprises:

the macro base station sends a bearer separation request carrying the identification information of the terminal and the information of the DRB to the local node; and after receiving the bearer separation response returned by the local node, determining whether the local cell can accept the DRB according to the bearer separation response.

3. The method of claim 1, wherein the method for the macro base station to determine whether the local cell can accommodate the DRB comprises:

the macro base station sending the configuration information of the dedicated resources to the local node specifically includes:

and the macro base station sends a bearer separation request to the local node, wherein the bearer separation request carries the identification information of the terminal, the information of the DRB and the configuration information of the special resource.

4. The method according to claim 3, wherein the macro base station obtaining the load information and/or the interference information of the local cell specifically comprises:

and the macro base station sends an information sharing request for the local cell to other macro base stations in the macro base stations, and receives load information and/or interference information of the local cell returned by the other macro base stations.

5. The method of claim 1, wherein after the macro base station sends the configuration information for the dedicated resources to the local node, further comprising:

and the macro base station sends an RRC message to the terminal to inform the terminal to execute the bearing separation operation, and the RRC message carries the configuration information of the special resource.

6. The method according to any of claims 1-5, wherein the configuration information of the dedicated resources comprises at least one of the following information:

7. A resource allocation method for local cells located in coverage overlapping areas of a plurality of macro base stations is characterized by comprising the following steps:

a local node to which a local cell belongs receives a bearer separation request which is sent by a macro base station and carries identification information of a terminal and information of a Data Radio Bearer (DRB), determines whether the DRB can be accepted or not, and returns a bearer separation response to the macro base station according to a determination result;

the local node receives a bearer separation request which is sent by the macro base station and carries identification information of a terminal, information of a Data Radio Bearer (DRB) and configuration information of a special resource;

and the local node configures the radio resource of the local cell according to the bearer separation request of the identification information of the portable terminal, the information of the data radio bearer DRB and the configuration information of the special resource.

8. The method of claim 7, further comprising:

the local node periodically sends load information and/or interference information of the local cell to the macro base station; or,

the local node sends the load information and/or the interference information of the local cell to the macro base station when the load and/or the interference condition of the local cell meet set conditions; or,

and after receiving the information acquisition request for the local cell sent by the macro base station, the local node sends the load information and/or the interference information of the local cell to the macro base station.

9. The method according to any of claims 7-8, wherein the configuration information of the dedicated resources comprises at least one of the following information:

10. The method of any of claims 7-8, wherein after the local node receives configuration information of radio resources allocated for the local cell from a macro base station, further comprising:

and the local node sends an RRC message to a terminal under the local cell, wherein the RRC message carries the configuration information of the radio resources.

11. A macro base station, the macro base station being one of a plurality of macro base stations, and local cells existing within coverage overlapping areas of the plurality of macro base stations, the macro base station comprising:

an allocating unit, configured to allocate a dedicated resource in a local cell for a terminal after determining that a data radio bearer DRB of the terminal needs to be transferred to a local node to which the local cell belongs and determining that the local cell can accommodate the DRB;

a sending unit, configured to send the configuration information of the dedicated resource to the local node.

12. A macro base station according to claim 11, wherein the allocation unit is to: determining whether the local cell can accommodate the DRB according to the following method:

13. A macro base station according to claim 11, wherein the allocation unit is to: determining whether the local cell can accommodate the DRB according to the following method:

the sending unit is used for:

14. A macro base station according to claim 13, wherein the allocation unit is configured to: acquiring the load information and/or the interference information of the local cell according to the following method:

15. The macro base station of claim 11, wherein the transmitting unit is further to:

16. A macro base station according to any of claims 11-15, wherein the configuration information of the dedicated resources comprises at least one of:

17. A local node that manages a local cell within an overlapping coverage area of a plurality of macro base stations, the local node comprising:

a receiving unit, configured to receive a bearer separation request sent by a macro base station, where the bearer separation request carries identification information of a terminal, information of a data radio bearer DRB, and configuration information of a dedicated resource;

a configuration unit, configured to configure the radio resource of the local cell according to the bearer separation request of the identification information of the portable terminal, the information of the data radio bearer DRB, and the configuration information of the dedicated resource;

and the processing unit is configured to receive, before the receiving unit receives the bearer separation request sent by the macro base station, the bearer separation request which is sent by the macro base station and carries the identification information of the terminal and the information of the data radio bearer DRB, determine whether the DRB can be admitted, and return a bearer separation response to the macro base station according to a determination result.

18. The local node of claim 17, wherein the local node further comprises:

a reporting unit, configured to periodically send load information and/or interference information of the local cell to the macro base station; or,

19. The local node according to any of claims 17-18, wherein the configuration information of the dedicated resource comprises at least one of the following information:

20. The local node according to any of claims 17-18, wherein the local node further comprises:

and the notification unit is configured to send an RRC message to the terminal in the local cell after the receiving unit receives the configuration information of the radio resource allocated to the local cell, where the configuration information of the radio resource is carried in the RRC message.