CN104519506B - Self-optimization method and device - Google Patents

Abstract

The invention discloses a self-optimization method, firstly, a first base station informs a second base station of splitting or merging information; and then, the second base station performs load balancing or switching according to the acquired splitting or combining information. The invention also discloses other self-optimization methods and corresponding self-optimization equipment. The method of the invention can coordinate the work among different base stations supporting AAS and between the base stations supporting AAS and not supporting AAS, support load balance, support the self-optimization of mobile robustness, avoid the failure of radio link or switching failure of UE and improve the performance of a mobile communication system.

Description

Self-optimizing method and device

technical field

The present application relates to the field of mobile communication systems, in particular to methods and devices for self-optimization.

Background technique

With the development of communication technology, the mobile communication system has developed into a System Architecture Evolution (SAE) system. Figure 1 shows a schematic structural diagram of the existing SAE system. As shown in FIG. 1, the system includes an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) 101 and a core network including at least a Mobility Management Entity (MME) 105 and a User Plane Entity (S-GW) 106. The E-UTRAN 101 uses For connecting user equipment (UE) to the core network, and E-UTRAN 101 includes more than one macro base station (eNB) 102 and home base station (HeNB) 103, optionally including home base station gateway (HeNB GW) 104, MME105 and The S-GW106 can be integrated in one module or implemented separately. The eNBs 102 are connected to each other through the X2 interface, and are respectively connected to the MME 105 and S-GW 106 through the S1 interface; the HeNB 103 is directly connected to the MME 105 and the S-GW 106 through the S1 interface, respectively, or is connected to the optional HeNB GW 104 through the S1 interface. , The HeNB GW104 is then connected to the MME105 and the S-GW106 respectively through the S1 interface.

In the initial stage of establishing the SAE system or during the operation of the SAE system, it is necessary to spend a lot of manpower and material resources to configure and optimize the parameters of the SAE system, especially the setting of the wireless parameters, so as to ensure the good coverage and capacity of the SAE system, the robustness of the movement, the mobile Time load balancing and user equipment access speed. In order to save the manpower and material resources configuration consumed in the operation of the SAE system, a self-optimization method of the SAE system is proposed at present. In the self-optimization process, the setting of the eNB or the HeNB is actually optimized according to the current state of the SAE system. Hereinafter, the eNB and the HeNB are collectively referred to as the eNB to illustrate the self-optimization method of the SAE system.

Figure 2 is a schematic diagram of the basic principle of self-optimization of the SAE system. As shown in Figure 2, after the eNB is powered on or accesses the SAE, the self-configuration process can be performed, which includes the basic configuration of the eNB and the initial wireless parameter configuration. Among them, the basic configuration of the eNB includes configuring the Internet Protocol (IP) address of the eNB and detecting the operation, maintenance and management (OA&M); the authentication between the eNB and the core network; when the eNB is a HeNB, it is also necessary to detect the HeNB GW; downloads eNB software and operational parameters to configure itself. The initial wireless parameter configuration is based on experience or simulation. The performance of each eNB in the SAE system will be affected by the environment in the area. Therefore, the eNB needs to configure the initial wireless parameters according to the environment in the area, and specifically perform the initial configuration and load balancing of the neighbor list. initial configuration.

After the self-configuration process, many parameters configured by the eNB are not optimized. In order to make the SAE system have better performance, the configuration of the eNB needs to be optimized or adjusted, which is also called the self-optimization of the mobile communication system. When optimizing or adjusting the configuration of the eNB, the OA&M in the background can control the eNB to complete it. There can be a standardized interface between the OA&M and the eNB. Then, the eNB optimizes the parameters configured by itself according to the parameters to be optimized. Of course, it can also be completed by the eNB itself, that is, the eNB detects the performance to be optimized, and optimizes or adjusts its own corresponding parameters. Optimizing or adjusting the configuration of the eNB may include: self-optimization of neighbor list, self-optimization of coverage and capacity, self-optimization of mobility robustness, self-optimization of load balancing, and self-optimization of random access channel (RACH) parameters Wait.

At present, the basic principle of load balancing self-optimization is: neighboring cells exchange load information and available resource information. When load balancing is required, the source cell can switch the UE it serves to the neighboring cell according to the UE's measurement report and the available resource information of the neighboring cell. The destination cell, the destination cell performs access control. When load balancing is required, the source cell may request the destination cell to change its handover trigger to the source cell.

In Release 12, 3GPP further proposed a research project to study whether and how to self-configure and self-optimize the network in the context of an adaptive antenna system (AAS). Three AAS scenarios that need to be considered for self-configuration and self-optimization are agreed: beam forming, cell shaping, and cell spliting/merging. The problem of UE connection failure is discussed in the scenario of cell splitting/merging. There is no reasonable solution for how to solve these problems and how to better support self-configuration and self-optimization in AAS scenarios.

SUMMARY OF THE INVENTION

In view of this, the present invention aims to provide several methods and devices for self-optimization, so that different base stations can perform load balancing according to the location of the UE, the available resources of the cell, and the available resources and configuration of the neighboring cells, so as to maximize the use of radio resources. and system resources, better support mobile load balancing self-optimization, avoid radio link failure, handover failure and RRC reconstruction failure, and improve mobile communication system performance.

In order to achieve the above purpose, the technical solutions of the embodiments of the present invention are specifically implemented as follows:

A self-optimizing method provided by this application includes:

The first base station notifies the second base station of splitting information or combining information;

The second base station performs load balancing or handover according to the acquired splitting information or the combining information.

Preferably, the split information includes: information of a new cell generated by the split, and the information of the new cell includes one or more of the following information: a cell identifier of the new cell, frequency information of the new cell, and tracking where the new cell is located. Area code TAC, list of PLMN IDs broadcast by the new cell, information about the adjacent cells of the new cell, the cell identity of the original cell before splitting to generate the new cell, and the time when the new cell can be used normally;

The combination information includes: information of the new cell after the combination, the information of the new cell includes one or more of the following information: the cell identifier of the new cell, the frequency information of the new cell, the TAC where the new cell is located, and the broadcast of the new cell. The PLMNID list of the new cell, the information of the adjacent cells of the new cell, the cell identity of the original cell before the merger, and the time when the new cell can be used normally.

Preferably, the load balancing performed by the second base station according to the obtained splitting information or combining information includes:

A resource status update message including a cell resource measurement result for the new cell is received, and load offload is performed according to the cell resource measurement result of the new cell.

Preferably, the handover performed by the second base station according to the acquired splitting information or combining information includes:

configuring the UE to measure the new cell;

Or send a handover request message, the handover request message includes information of one or more new cells, where the information of the new cells includes: cell identity, keNB star, and short medium access control identity shortMAC-I.

A self-optimization device provided by this application includes: a notification module and a self-optimization module, wherein:

The notification module is used to notify split information or merge information;

The self-optimization module is configured to perform load balancing or switching according to the obtained splitting information or merging information.

A self-optimizing method provided by this application includes:

The first base station notifies the second base station of the capability information of the first base station and/or the state information of the cell of the first base station;

The second base station performs load balancing or handover or performs energy saving according to the acquired state information or the capability information.

Preferably, the capability information of the first base station includes at least one of the following information:

Whether the first base station or the first base station cell supports AAS,

Whether the first base station or the first base station cell supports beamforming,

Whether the first base station or the first base station cell supports cell shaping,

Whether the first base station or the first base station cell supports cell splitting,

Whether the first base station or the first base station cell supports cell combining.

Preferably, if the first base station or the first base station cell supports cell splitting, the method further includes: the first base station notifies the second base station of the supported cell splitting configuration, and notifies the current serving cell and the cell splitting configuration that can be supported by splitting or merging. The cell information is notified to the second base station.

Preferably, the cell information that can be supported by splitting or merging includes one or more of the following information:

The cell ID of the cell, the frequency information of the cell, the TAC where the cell is located, the PLMN ID list broadcast by the cell, the information of the cells adjacent to the cell, the cell ID of the original cell before splitting or merging, and the time when the cell can be used normally.

Preferably, the state information of the first base station cell includes: whether the cell is in an active state, or the cell is in an inactive state, or an AAS active state, or an AAS inactive state, or what kind of cell split state information of AAS.

Preferably, the load balancing performed by the second base station according to the acquired information includes:

Receive a resource status update message including a cell resource measurement result of the new cell, or receive a cell resource measurement result of a cell that is in an inactive state and can be obtained through cell splitting, and perform load offloading according to the cell resource measurement result; The cell resource measurement result of the new cell includes: cell identity, hardware load indication, S1 transport layer TNL load indication, radio resource indication, comprehensive available capacity group and ABS status;

Or, request the corresponding base station to perform AAS cell splitting according to the information.

Preferably, the handover performed by the second base station according to the acquired information includes:

Configure the UE to measure the new cell or make more preparations for handover, and include the information of the new cell in the sent handover request message, where the information of the new cell includes: cell identity, keNB star, short medium access control identity shortMAC-I .

A self-optimization device provided by this application includes: a notification module and a self-optimization module, wherein:

The notification module is used to notify the capability information of the device and/or the state information of the cell of the device;

The self-optimization module is configured to perform load balancing or switching or perform energy saving according to the acquired state information or capability information.

A self-optimizing method provided by this application includes:

When the base station performs the adaptive antenna system AAS operation, the UE context is generated in the new cell for the UE in the connected state;

The base station receives the RRC connection re-establishment request in the cell, establishes an RRC connection for the UE, and sends an RRC connection re-establishment message.

Preferably, when the base station performs the AAS operation, generating the UE context in the new cell includes:

When the base station decides to perform cell splitting on its control cell, it generates a UE context for the UE in the cell before splitting in the new cell after splitting;

Or, when the base station decides to perform cell merging on its controlled cell, a UE context is generated for the UE in the cell before merging in the new cell after merging;

The UE context includes shortMAC-I, KeNB star, and/or the PCI of the source cell where the UE is located.

Preferably, the UE context further includes the C-RNTI of the UE in the new cell.

Preferably, the base station performs the operation of generating the UE context in the new cell during the AAS operation when the cell splitting or merging can be completed within the time of the clock T311 of the cell.

A self-optimizing device provided by this application includes: a context management module and a connection management module, wherein:

The context management module is used to generate a UE context in a new cell for a UE in a connected state when the device performs an AAS operation;

The connection management module is configured to receive an RRC connection re-establishment request from the UE in the cell, establish an RRC connection for the UE, and send an RRC connection re-establishment message.

A self-optimizing method provided by this application includes:

The first base station decides to perform cell splitting or merging, and the first base station notifies the second base station of splitting information or merging information;

The second base station initiates a handover process to other cells for the UE that is being handed over to the cell to be split or merged, or sends re-establishment information to the first base station.

Preferably, the first base station notifies the second base station of splitting or merging information through UE associated signaling or UE non-associated signaling.

Preferably, if the signaling is associated with the UE, the signaling includes that the reason for the handover failure is cell splitting or merging; if the signaling is unassociated with the UE, the signaling includes the state of the cell: AAS cell split or merged cell. state or inactive state.

Preferably, the re-establishment information includes cell information of all new cells generated by splitting or merging, and the cell information includes cell identification, KeNB star, and shortMAC-I.

A self-optimization device provided by this application includes: a notification module and a self-optimization module, wherein:

After the device receives the handover request message from other base stations and decides to perform cell splitting or merging before receiving the handover complete message from the UE, the notification module is used to notify the splitting or merging information;

The self-optimization module is used for initiating a handover process to other cells for a UE that is being handed over to a cell to be split or merged, or sending re-establishment information to a corresponding base station.

A self-optimizing method provided by this application includes:

When the first base station receives the handover request message from the second base station, cell splitting or merging is in progress, or the first base station decides to perform cell splitting or merging after receiving the handover request message from the second base station, and the first base station sends the handover preparation sending a failure message to the second base station, and the failure reason contained therein is cell splitting or merging;

The second base station initiates a handover process to other cells for the UE that is being handed over to the cell to be split or merged, or sends re-establishment information to the first base station.

Preferably, the handover preparation failure message further includes split information or merge information.

Preferably, the splitting information or the combining information may be sent to the base station 2 through UE non-associated signaling.

A self-optimization device provided by this application includes: a notification module and a self-optimization module, wherein:

When the device decides to perform cell splitting or merging after receiving the handover request message from other base stations, the notification module is configured to send a handover preparation failure message to the other base stations, which contains the failure cause of cell splitting or merging ;

The self-optimization module is used for initiating a handover process to other cells for a UE that is being handed over to a cell to be split or merged, or sending re-establishment information to a corresponding base station.

To sum up, the several self-optimization technical solutions provided by the present invention enable coordinated work between different base stations supporting AAS and between base stations that support AAS and those that do not support AAS, support load balancing, and support self-optimization of mobile robustness , and avoid radio link failure or handover failure of the UE, which improves the performance of the mobile communication system.

Description of drawings

1 is a schematic structural diagram of an existing SAE system;

FIG. 2 is a schematic diagram of the basic principle of the existing self-optimization of the SAE system;

Fig. 3 is the working flow chart of method 1 of the present invention supporting self-optimization in AAS scenario;

Fig. 4 is the working flow chart of method 2 of the present invention supporting self-optimization in AAS scenario;

Fig. 5 is the working flow chart of the third method for supporting self-optimization in the AAS scenario according to the present invention;

FIG. 6 is a work flow diagram of the fourth method for supporting self-optimization in an AAS scenario according to the present invention;

FIG. 7 is a work flow diagram of the fifth method for supporting self-optimization in an AAS scenario according to the present invention;

8 is a schematic diagram of the composition structure of the first preferred self-optimizing device of the present invention;

FIG. 9 is a schematic diagram of the composition structure of the second preferred self-optimizing device of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and examples.

FIG. 3 is a working flowchart of the first method for supporting self-optimization in an AAS scenario according to the present invention. As shown in Figure 3, the process includes:

Step 301, base station 1 notifies base station 2 of splitting information or merging information.

When the base station 1 wants to split/merge cells, or after splitting/merging cells, it notifies other base stations of the split information or the merge information.

For the cell to be split, the splitting information or combining information includes: information of a new cell generated by splitting, and the information of the new cell includes one or more of the following information:

- the cell identity of the new cell (could be PCI and/or ECGI);

- frequency information of the new cell;

- Tracking Area Code (TAC) where the new cell is located;

- a list of PLMN IDs broadcast by the new cell;

- information on the neighbouring cells of the new cell;

- The cell identity of the original cell before splitting to generate a new cell. The relationship between the new cell and the original cell can be known from the cell identifier;

- The time when the new cell can be used normally. The time may be an absolute time or a relative time, indicating that the base station 2 can start the timer after receiving the message from the base station 1, and it will take a long time before the new cell can be used normally. This time may also indicate that the original cell will not be available after this time. The information that the original cell cannot be used after this time may also be included in the serving cell information of the original cell.

The base station 2 knows that the original cell will no longer be available due to the cell split according to the relationship between the new cell and the original cell before the split. Either the base station 1 clearly includes the status of the original cell as cell splitting or cell splitting in progress or AAS through the message notifying the base station 2, or the base station 1 includes the original cell in the service to be deleted in the message notifying the base station 2 cell information, so that the base station 2 knows that the original cell will no longer be available.

For the cells to be merged, the splitting information or the merging information includes: the information of the new cell after merging, and the information of the new cell includes one or more of the following information:

- the cell identity of the new cell (could be PCI and/or ECGI);

- frequency information of the new cell;

- Tracking Area Code (TAC) where the new cell is located;

- a list of PLMN IDs broadcast by the new cell;

- information on the neighbouring cells of the new cell;

- The cell identity of the original cell before merging. From these cell identifiers, the relationship between the merged cell and the original cell before the merge can be known;

- The time when the new cell can be used normally. The time may be an absolute time or a relative time, according to which a timer can be started, indicating how long after base station 2 receives the message from base station 1, the merged cell can be used normally. This time may also indicate that the original cell before the merger will not be available after this time. The information that the original cell before merging cannot be used after this time may also be included in the serving cell information of the original cell before merging.

The base station 2 knows that the original cell will no longer be available because of the cell combination according to the relationship between the combined cell and the original cell before the combination. Either the base station 1 explicitly includes the state of the original cell as cell merging or cell splitting in progress or AAS through the message notifying the base station 2, or the base station 1 includes the original cell in the message to be deleted in the message notifying the base station 2. In the serving cell information, the base station 2 knows that the original cell will no longer be available.

Base station 1 may notify base station 2 of the above-mentioned information through an eNB configuration update message.

Step 302, the base station 2 decides how to perform load balancing or how to initiate handover of the UE from the base station 2 to the cell of the base station 1 according to the received information.

The base station 2 may configure the measurements of the UE. For example, the cell before splitting is cell 1, and the cell after splitting is cell 2 and cell 3. If the neighboring cells of cell 10 under base station 2 include cell 1, then base station 2 can configure UE measurements under cell 10, and the neighboring cells to be measured include multiple new cells (such as cell 2 and cell 3). This ensures that the UE can be handed over to the cell 2 or the cell 3 in time, avoiding radio link failure or handover failure, and preventing the UE from returning to the idle mode. When configuring the UE measurement, the base station 2 may consider the time information received from the base station 1, and decide when to configure the UE measurement according to the time when the new cell can be normally used.

The base station 2 may configure the measurements of the UE. For example, the cells before merging are cell 2 and cell 3, and the cells after merging are cell 1. If the neighboring cells of cell 10 under base station 2 include a new cell (such as cell 2), then base station 2 can configure the measurement of the UE under cell 10, and the neighboring cells to be measured include cell 1. This ensures that the UE can be handed over to cell 1 in time to avoid radio link failure or handover failure, and prevent the UE from returning to the idle mode. When configuring the UE measurement, the base station 2 may consider the time information received from the base station 1, and decide when to configure the UE measurement according to the time when the new cell can be normally used.

The base station 2 can do multiple handover preparations (Multiple handovers preparation, re-establishment information). For example, the cell before splitting is cell 1, and the cell after splitting is cell 2 and cell 3. If the neighboring cells of the cell 10 under the base station 2 include the cell 1, then the base station 2 can make more preparations for the handover when it decides to initiate the handover from the UE to the cell 1. That is, the handover request message sent by base station 2 to base station 1 includes information about multiple new cells (such as cell 2 and cell 3). The meaning and calculation method are the same as those in the 3GPP specifications TS36.331 and TS33.401, which are not repeated here), short medium access control identifier (shortMAC-I). This ensures that during the process of cell 1 splitting into cell 2 and cell 3, if cell 1 becomes unavailable, the UE can be successfully rebuilt in cell 2 or cell 3, and the UE can access cell 2 or cell 3 in time to avoid wireless links. failure or handover failure, to avoid the UE returning to idle mode. When making more preparations for handover, base station 2 can consider the time information received from base station 1, and decide whether and when to perform handover on the UE according to the normal use time of the new cell (the cell that can be generated by splitting or merging). Be prepared to switch.

The base station 2 can make multiple preparations for handover. For example, the cells before merging are cell 2 and cell 3, and the cells after merging are cell 1. If the neighboring cells of the cell 10 under the base station 2 include the cell 2, then the base station 2 can make more preparations for the handover when it decides to initiate the handover from the UE to the cell 2. That is, the handover request message sent by base station 2 to base station 1 includes information of a cell (such as cell 1), and the information of cell 1 includes the cell identifier of cell 1, keNB star (the specific meaning and calculation method are consistent with 3GPP specifications TS36.331 and It is the same in TS33.401 and will not be repeated here), shortMAC-I. This ensures that in the process of merging cell 2 and cell 3 into cell 1, if cell 2 becomes unavailable, the UE can successfully rebuild in cell 1, and the UE can access cell 1 in time to avoid radio link failure or handover failure. Avoid returning the UE to idle mode. When making more preparations for handover, base station 2 can consider the time information received from base station 1, and decide whether and when to perform handover on the UE according to the normal use time of the new cell (the cell that can be generated by splitting or merging). Be prepared to switch.

For the case where cell 1 is to be split into cell 2 and cell 3, if base station 2 requests base station 1 to report the resources of cell 1, and base station 1 accepts the request, then base station 1 sends the resource status update message including cell 2 and cell 1. 3 cell resource measurement results. The cell resource measurement results of cell 2 and cell 3 may include cell identity, hardware load indication, S1 transport layer TNL load indication, radio resource indication, comprehensive available capacity group and ABS status. Base station 2 learns the information of cell 1 split through the notification of base station 1, so base station 2 regards this report as a normal report, because cell 2 and cell 3 are to replace cell 1, so the load status of cell 2 and cell 3 is also the same for base station 2. valuable. In this way, when the base station 2 wants to offload the offload to the base station 1 cell, it can be performed in time, to avoid re-initiating the resource request process, to prevent the original resource request process from being pending, and to avoid resource reporting and offloading due to the disappearance of cell 1. Execute in a timely manner.

For the case where cell 2 and cell 3 are to be merged into cell 1, if base station 2 requests base station 1 to report the resources of cell 2 or cell 3, and base station 1 accepts the request, then base station 1 includes the cell when sending the resource status update message. 1 for the cell resource measurement result. The cell resource measurement result of the cell 1 may include a cell identity, a hardware load indication, an S1 transport layer TNL load indication, a radio resource indication, a comprehensive available capacity group, and an ABS state. Base station 2 obtains the information that cell 2 and cell 3 are merged into cell 1 through the notification of base station 1, so base station 2 regards this report as a normal report, because cell 1 replaces cell 2 and cell 3, so the load status of cell 1 is not Base station 2 is also valuable. In this way, when base station 2 wants to offload offload to base station 2 or cell 3, it can be performed in time to avoid re-initiating the resource request process, to avoid the original resource request process hanging there, and to avoid resource reporting and resource reporting due to the disappearance of cell 2 or cell 3. The triage could not be executed in a timely manner.

The message between the base station 1 and the base station 2 can be sent through the X2 interface or sent through the core network using the S1 message.

So far, the workflow of the self-optimization method 1 in the AAS scenario of the present invention is completed. Through this method, the base station can be informed of the status of neighboring base station cells in time, make better use of system resources and wireless resources, more effectively carry out mobile load balancing self-optimization, better set measurement and handover, and avoid wireless link failure or handover Failure or Radio Resource Connection (RRC) re-establishment failed.

FIG. 4 is a work flow diagram of the second method for supporting self-optimization in an AAS scenario according to the present invention. As shown in Figure 4, the process includes:

Step 401, base station 1 notifies base station 2 of base station 1 capability information and/or base station 1 cell status information.

The base station 1 capability information includes at least one of the following information:

Whether base station 1 or base station 1 cell supports AAS capability information,

Whether base station 1 or base station 1 cell supports beamforming,

Whether base station 1 or base station 1 cell supports cell shaping,

Whether base station 1 or base station 1 cell supports cell splitting,

Whether base station 1 or the cell of base station 1 supports cell combining.

In the case that base station 1 or a cell of base station 1 supports cell splitting, base station 1 may also notify base station 2 of which configurations of cell splitting are supported, for example, the information that supports splitting into two cells or three cells. The message sent by base station 1 to base station 2 also includes current serving cell information and cell information that can be supported by splitting or merging. For example, the current serving cell is cell 1, and when necessary, cell 1 can be split into cell 2 and cell 3. In this way, the message can include cell 2 and cell 3 in addition to the information of cell 1 as the information of the serving cell. As the information of the serving cell, the states of the cell 2 and the cell 3 are inactive (not active), and can be split into an active (active) state through AAS splitting. The message may also include the relationship between cell 2 and cell 3 and cell 1 (that is, cell 2 and cell 3 may be generated by splitting cell 1). This relationship can be identified by including the information of cell 2 and cell 3 in the information of serving cell 1 as sub-information of serving cell 1 . The information of cell 2 and cell 3 may also include the identifier of cell 1 to indicate which cell (ie, cell 1 ) can be generated by splitting. Another example is that the current serving cells are cell 2 and cell 3. When necessary, cell 2 and cell 3 can be merged into cell 1. In this way, the message includes the information of cell 2 and cell 3 as the information of the serving cell, as well as the information of the serving cell. Cell 1 is used as the information of the serving cell. The state of cell 1 is not active, and can be merged into an active state through AAS. The message may also include the relationship between cell 1 and cell 2 and cell 3 (that is, cell 1 may be generated by combining cell 2 and cell 3). The cell identities of cell 2 and cell 3 may also be included in the information of cell 1 to indicate which cells can be combined to generate.

The cell information that can be supported by splitting or merging includes one or more of the following information:

- the cell identity of the cell (could be PCI and/or ECGI);

- frequency information of the cell;

- Tracking Area Code (TAC) where the cell is located;

- a list of PLMN IDs broadcast by the cell;

- information on the neighbouring cells of the cell;

- The cell identity of the original cell before splitting/merging. The relationship between the new cell and the original cell can be known from the cell identifier; for the case of merging, the cell identifiers of the original cell can be multiple;

- The time when the cell can be used normally, such as 1:00 pm to 3:00 pm.

The state information of the cell includes information about whether the cell is in an active state, or in an inactive state, or in an AAS active state, or in an AAS inactive state, or in which cell split state of the AAS. Which cell split state of the AAS, for example, cell 1 can be split into two cells or three cells, and is now in a state of split into two cells.

The base station 1 may notify the base station 2 of the above information through an X2 setup request message or an eNB configuration update message. The base station 2 may send the above-mentioned information of the base station 2 to the base station 1 through an X2 setup response message or an eNB configuration update message.

When the above-mentioned capability or cell state of the base station 1 is updated, the base station 1 may send the above-mentioned information to the base station 2 by using an eNB configuration update message. If the new configuration starts to be used normally after a certain period of time, base station 1 informs base station 2 of the time of normal use. The time can be absolute time or relative time, indicating a period of time after base station 2 receives the message After that the new configuration starts to work normally.

Step 402, the base station 2 decides how to perform load balancing or how to initiate a handover of the UE from the base station 2 to the base station 1 cell or decide to perform energy saving according to the received status information or the capability information.

When the state of the cell under the base station 1 changes, the base station 2 can configure the measurement of the UE. For example, the cell before splitting is cell 1, and the cell after splitting is cell 2 and cell 3. If the neighboring cells of the cell 10 under the base station 2 include the cell 1, the base station 2 can configure the measurement of the UE under the cell 10, and the neighboring cells to be measured include the cell 2 and the cell 3. This ensures that handover to cell 2 or cell 3 can be made in time, avoiding radio link failure or handover failure, and preventing the UE from returning to idle mode. When configuring the UE measurement, the base station 2 may consider the time information received from the base station 1, and decide when to configure the UE measurement according to the time when the new cell can be normally used.

When the state of the cell under the base station 1 changes, the base station 2 can configure the measurement of the UE. For example, the cells before merging are cell 2 and cell 3, and the cells after merging are cell 1. If the neighboring cells of the cell 10 under the base station 2 include the cell 2, the base station 2 can configure the measurement of the UE under the cell 10, and the neighboring cells to be measured include the cell 1. This ensures timely handover to cell 1, avoids radio link failure or handover failure, and prevents the UE from returning to idle mode. When configuring the UE measurement, the base station 2 may consider the time information received from the base station 1, and decide when to configure the UE measurement according to the time when the new cell can be normally used.

The base station 2 can make more preparations for handover. For example, the cell before splitting is cell 1, and the cell after splitting is cell 2 and cell 3. If the neighboring cells of the cell 10 under the base station 2 include the cell 1, then the base station 2 can make more preparations for the handover when it decides to initiate the handover from the UE to the cell 1. That is, the handover request message sent by the base station 2 to the base station 1 includes the information of the cell 2 and the cell 3 . The information of cell 2 and cell 3 may be included in the re-establishment information of the handover request. The information of cell 2 and cell 3 includes cell identifier, keNB star (the specific meaning and calculation method are the same as those in 3GPP specifications TS36.331 and TS33.401, and will not be repeated here), shortMAC-I. This ensures that during the process of cell 1 splitting into cell 2 and cell 3, if cell 1 becomes unavailable, the UE can be successfully rebuilt in cell 2 or cell 3, and the UE can access cell 2 or cell 3 in time to avoid wireless links. failure or handover failure to avoid the UE returning to idle mode. When making more preparations for handover, base station 2 can consider the time information received from base station 1, and decide whether and when to perform handover on the UE according to the normal use time of the new cell (the cell that can be generated by splitting or merging). Be prepared to switch.

The base station 2 can make more preparations for handover. For example, the cells before merging are cell 2 and cell 3, and the cells after merging are cell 1. If the neighboring cells of the cell 10 under the base station 2 include the cell 2, then the base station 2 can make more preparations for the handover when it decides to initiate the handover from the UE to the cell 2. That is, the handover request message sent by the base station 2 to the base station 1 includes the information of the cell 1 . The information of cell 1 may be included in the re-establishment information of the handover request. The information of the cell 1 includes the cell identifier of the cell 1, the keNB star (the specific meaning and calculation method are the same as those in the 3GPP specifications TS36.331 and TS33.401, and will not be repeated here), and shortMAC-I. This ensures that in the process of merging cell 2 and cell 3 into cell 1, if cell 2 becomes unavailable, the UE can successfully rebuild in cell 1, and the UE can access cell 1 in time to avoid radio link failure or handover failure. Avoid returning the UE to idle mode. When doing more preparations for handover, base station 2 may consider the time information received from base station 1, and decide whether and when to perform multiple preparations for handover according to the time when the new cell can be used normally.

For the case where cell 1 is to be split into cell 2 and cell 3, if base station 2 requests base station 1 to report the resource status of cell 1, and base station 1 accepts the request, then base station 1 can include cell 2 and cell 1 when sending the resource status update message. The cell resource measurement result of cell 3. The cell resource measurement results of cell 2 and cell 3 may include cell identity, hardware load indication, S1 transport layer TNL load indication, radio resource indication, comprehensive available capacity group and ABS status. Base station 2 learns the information of cell 1 split through the notification of base station 1, so base station 2 regards this report as a normal report, because cell 2 and cell 3 are to replace cell 1, so the load status of cell 2 and cell 3 is also the same for base station 2. valuable. In this way, when the base station 2 wants to offload the offload to the base station 1 cell, it can be performed in time to avoid re-initiating the resource request process, to avoid the original resource request process hanging there, and to prevent the resource reporting and offload from being unable to be performed in time due to the disappearance of cell 1.

For the case where cell 2 and cell 3 are to be merged into cell 1, if base station 2 requests base station 1 to report the resource status of cell 2 or cell 3, and base station 1 accepts the request, then base station 1 can send the resource status update message. Contains the cell resource measurement result of cell 1. The cell resource measurement result of the cell 1 may include a cell identity, a hardware load indication, an S1 transport layer TNL load indication, a radio resource indication, a comprehensive available capacity group, and an ABS state. Base station 2 obtains the information that cell 2 and cell 3 are merged into cell 1 through the notification of base station 1, so base station 2 regards this report as a normal report, because cell 1 replaces cell 2 and cell 3, so the load status of cell 1 is not Base station 2 is also valuable. In this way, when base station 2 wants to offload offload to base station 2 or cell 3, it can be performed in time to avoid re-initiating the resource request process, to avoid the original resource request process hanging there, and to avoid resource reporting and resource reporting due to the disappearance of cell 2 or cell 3. The triage could not be executed in a timely manner.

When the base station 2 sends the resource status request message to the base station 1, it can request the resource status of the cell that is currently in the inactive state but can be split from a certain cell. If the base station 1 accepts the request, the base station 1 includes the resource cell resource measurement result of the cell that can be generated by cell splitting when sending the resource status update. The cell resource measurement result includes cell identification, hardware load indication, S1 transport layer TNL load indication, radio resource indication, comprehensive available capacity group, ABS status, and the like.

When base station 2 needs to offload load to base station 1, base station 2 may send a message to base station 1 to request base station 1 to perform AAS cell splitting. The base station 2 may decide to request the base station 1 to perform AAS cell splitting according to the received capability information of the base station 1 and/or the resource status of the base station 1 cell and/or the traffic that the base station 2 needs to offload. Especially according to the resource reporting process between the base station 1 and the base station 2, when the existing available resources of the base station 1 cell are insufficient, such an operation has a great effect on effective load balancing. The base station 2 may also request the base station 1 how to perform the AAS operation according to the AAS operation configuration supported by the base station 1, such as dividing into two cells or three cells. The base station 1 may perform corresponding operations after receiving the cell splitting request from the base station 2. The base station 2 may also notify the base station 1 of the information of the required resources, so that the base station 1 performs the corresponding AAS operation according to the situation of the resources required by the base station 2, such as splitting into two cells or three cells. Such a scheme is especially useful in a heterogeneous network (hetnet) environment, such as macro cells with basic coverage, and pico cells. The pico cell supports the AAS function, and the pico cell does not bring coverage loopholes when performing the AAS operation, so the pico cell can perform the AAS operation according to the requirements of the basic coverage cell flow.

When base station 2 needs to offload load to base station 1, base station 2 can send a message to base station 1 to request base station 1 to perform cell shaping. The base station 2 may decide to request the base station 1 to perform cell shaping according to the received capability information of the base station 1 and/or the resource status of the cell of the base station 1 and/or the traffic that the base station 2 needs to offload. The base station 2 requests the base station 1 cell to do cell shaping in that direction according to the measurement report of the UE or the position of the UE.

In order to save energy, the base station 1 may be in a switch off or deactivation state. When the base station 2 requests the base station 1 cell to switch on (switch on), it can request the base station 1 cell to switch on in what way, for example, switch on the cell 1 or switch on the cell 2 and the cell 3 (it is assumed here that the cell 1 can be split into the cell 2 and the cell 3 ), the base station 2 can decide how to request the base station 1 to open according to the traffic and resource requirements it needs to offload to the base station 1.

The message between the base station 1 and the base station 2 can be sent through the X2 interface or sent through the core network using the S1 message.

So far, the workflow of the second self-optimization method in the AAS scenario of the present invention is completed. Through this method, the base station can be informed of the status of neighboring base station cells in time, make better use of system resources and wireless resources, more effectively carry out mobile load balancing self-optimization, better set measurement and handover, and avoid wireless link failure or handover In case of failure or RRC reconstruction failure, this method can better combine with energy saving to better ensure the network capacity.

FIG. 5 is a working flowchart of the third method for supporting self-optimization in an AAS scenario according to the present invention. As shown in Figure 5, the process includes:

Step 501 , when the base station performs an adaptive antenna system (AAS) operation, a UE context is generated in a new cell for a UE in a connected state.

Specifically, the base station may generate the UE context in the new cell in the following cases:

The base station decides to perform cell splitting on its control cell, for example, cell 1 is split into cell 2 and cell 3. The base station generates a UE context in cell 2 and cell 3 for the UE in cell 1. The UE context includes shortMAC-I, KeNB star, PCI of the source cell where the UE is located, and may also include the C-RNTI of the UE in cell 1. The base station also knows the cell where the UE context is located, such as cell 2 or cell 3. In this way, if the UE served in cell 1 cannot be successfully handed off, the UE that fails to connect during the split of cell 1 can ensure that it is successfully re-established in cell 2 or cell 3, so that the UE does not return to idle mode.

The base station decides to perform cell merging for its control cell, for example, cell 2 and cell 3 are merged into cell 1. The base station generates the UE context in cell 1 for the UE served by the cell 2, and the base station generates the UE context in the cell 1 for the UE served by the cell 3. The UE context includes shortMAC-I, KeNB star, PCI of the source cell where the UE is located, and may also include the C-RNTI of the UE in cell 2 or cell 3. The base station also knows the cell where the UE context is located, eg, cell 1. In this way, if the UE served in cell 2 or cell 3 cannot be successfully handed over, the UE that fails to connect during the process of merging cell 2 and cell 3 can ensure that it is successfully reestablished in cell 1, so that the UE does not return to idle mode.

The base station receives a handover request message sent from another base station or an MME, where the handover request message includes the PCI of the source cell. According to the second method, if another base station knows that the base station supports the AAS function or that a certain cell of the base station supports the AAS function, when another base station initiates handover of the UE to the base station or to the cell of the base station , which can always contain the cell identity PCI of the source cell. If the target cell of the handover is cell 1, and cell 1 is being split into cell 2 and cell 3, then the target base station generates UE contexts of the UE in cell 2 and cell 3. The UE context includes shortMAC-I, KeNB star, PCI of the source cell where the UE is located, and may also include the C-RNTI of the UE in cell 2 or cell 3. The base station also knows the cell where the UE context is located, such as cell 2 or cell 3. In this way, if the handover of the UE fails, the reconstruction can be successful in cell 2 and cell 3, so that the UE does not return to the idle mode. If the target cell of the handover is cell 2, and cell 2 and cell 3 are being merged into cell 1, then the target base station generates the UE context of the UE in cell 1. The UE context includes shortMAC-I, KeNB star, PCI of the source cell where the UE is located, and may also include the C-RNTI of the UE in cell 1. The base station also knows the cell where the UE context is located, eg, cell 1. In this way, if the handover of the UE fails, the re-establishment can be successful in cell 1, so that the UE does not return to the idle mode.

The generation of the UE context in the new cell by the base station during the AAS operation can be performed according to the operation and maintenance (O&M) configuration, or it can be performed by the base station at its own discretion. When the base station performs the AAS operation, the UE context generated in the new cell can be executed only when the cell splitting or merging can be completed within the time of the clock T311 of the cell. The base station may also consider the time required for cell splitting or merging when setting the T311 clock in a cell that supports AAS operation, so that T311 is longer than the time required for AAS operation. The time required for the AAS operation refers to the time from when the base station starts to perform cell splitting until the split cells can be used normally.

Step 502, the base station receives an RRC connection re-establishment request from the UE in the cell, establishes an RRC connection for the UE, and sends an RRC connection re-establishment message to the UE.

So far, the workflow of the third self-optimization method in the AAS scenario of the present invention is completed. By this method, radio link failure or handover failure or RRC reconstruction failure can be avoided, network capacity can be better guaranteed, and user satisfaction can be improved.

FIG. 6 is a working flowchart of the fourth method for supporting self-optimization in an AAS scenario according to the present invention. As shown in Figure 6, the process includes:

Step 601, base station 1 decides to perform cell splitting or merging, and base station 1 notifies base station 2 of the splitting information or merging information of base station 1's cell. The message between the base station 1 and the base station 2 may be sent through the X2 interface or sent through the core network using the S1 message.

Wherein base station 2 is a neighboring base station of base station 1 . The cell controlled by base station 2 is a neighboring cell of the cell controlled by base station 1 . When the base station 1 decides to split or merge the cells, it may have received the handover request message from the base station 2 to handover the UE, but has not received the handover complete message from the UE.

The base station 1 may notify the base station 2 of the splitting information or merging information of the base station 1 cell through UE associated signaling or UE non-associated signaling. If the signaling is associated with the UE, the signaling may include that the reason for the handover failure is cell splitting or merging; if the signaling is not associated with the UE, the signaling may include the status of the cell: AAS cell split or merged cell status or inactive state. If it is UE non-associated signaling, the base station 2 can be notified of the split information or the merge information of the base station 1 cell through the eNB configuration update message.

The splitting information or merging information further includes the splitting information or merging information described in step 301, which is not repeated here.

Step 602 , the base station 2 initiates a handover process to another cell for the UE that is being handed over to the cell to be split or merged, or sends re-establishment information to the base station 1 . Base station 2 sends a handover request message to base station 1 according to it (if it is an S1 handover, it is a handover request and a handover request message), but has not received a resource release message or a UE context release command message to know that the handover of the UE has not been completed. The message between the base station 1 and the base station 2 may be sent through the X2 interface or sent through the core network using the S1 message.

The base station 2 may initiate the handover of the UE to the new cell generated by the split or merge. For the case where base station 1 performs cell splitting, base station 2 includes all split cell information in the reestablishment information included in the handover request or handover request message, and the cell information includes cell identifier, KeNB star, and shortMAC-I. In this way, it can be ensured that the re-establishment can be successful no matter which split cell the UE is in. The base station 2 can calculate the KeNB star according to the cell identity, cell frequency, etc. of the new cell generated by splitting or merging received in step 601 . The calculation of the shortMAC-I and the KeNB star is the same as that in the prior art, and will not be repeated in the present invention.

The base station 2 may also send re-establishment information to the base station 1, where the re-establishment information includes cell information of all new cells generated by splitting or merging, and the cell information includes the cell identifier, KeNB star, and shortMAC-I. In this way, it can be ensured that the re-establishment can be successful no matter which split cell the UE is in. The base station 2 can calculate the KeNB star according to the cell identity, cell frequency, etc. of the new cell generated by splitting or merging received in step 601 . The calculation of the shortMAC-I and the KeNB star is the same as that in the prior art, and will not be repeated in the present invention.

So far, the work flow of the fourth self-optimization method in the AAS scenario of the present invention is completed. By this method, radio link failure or handover failure or RRC reconstruction failure can be avoided, network capacity can be better guaranteed, and user satisfaction can be improved.

FIG. 7 is a working flowchart of the fifth method for supporting self-optimization in an AAS scenario according to the present invention. As shown in Figure 7, the process includes:

Step 701, when base station 1 receives the handover request message from base station 2, it is performing cell splitting or merging, or base station 1 decides to do cell splitting or merging after receiving the handover request message from base station 2, and base station 1 sends a handover preparation failure message to base station 2. The handover preparation failure message can be sent through the X2 interface or sent through the core network with an S1 message.

The failure reason included in the handover preparation failure is cell splitting or merging.

The handover preparation failure may also include split information or merge information. The splitting information or the combining information is the same as that in step 301, and will not be repeated here.

Base station 1 may send cell splitting information or combining information to base station 2 through UE unassociated signaling such as eNB configuration update. The splitting information or the combining information is the same as that in step 301, and will not be repeated here.

Step 702 is the same as step 602 and will not be repeated here. The base station 2 knows that the target cell is undergoing cell splitting or merging according to the handover preparation failure, and the splitting information or merging information, or the base station 2 knows that the target cell is undergoing cell splitting according to the handover preparation failure, and knows the splitting information or merging information according to UE non-associated signaling information, so that the base station 2 performs the operation of step 602 .

So far, the workflow of the fifth method of self-optimization in the AAS scenario of the present invention is completed. By this method, radio link failure or handover failure or RRC reconstruction failure can be avoided, network capacity can be better guaranteed, and user satisfaction can be improved.

Corresponding to the first method of self-optimization shown in FIG. 3 , the present invention provides a self-optimization device as shown in FIG. 8 , the device includes a notification module and a self-optimization module, wherein:

The notification module is used to notify split information or merge information;

The self-optimization module is configured to perform load balancing or switching according to the obtained splitting information or merging information.

Corresponding to the second method of self-optimization shown in FIG. 4 , the present invention also provides a self-optimization device. The composition of the device is the same as that of the self-optimization device shown in FIG. 8 , and also includes a notification module and a self-optimization module, wherein:

The notification module is used to notify the capability information of the device and/or the state information of the cell of the device;

The self-optimization module is configured to perform load balancing or switching or perform energy saving according to the acquired state information or capability information.

Corresponding to the third method of self-optimization shown in FIG. 5 , the present invention provides a self-optimization device as shown in FIG. 9 , the device includes: a context management module and a connection management module, wherein:

The context management module is used to generate a UE context in a new cell for a UE in a connected state when the device performs an AAS operation;

The connection management module is configured to receive an RRC connection re-establishment request from the UE in the cell, establish an RRC connection for the UE, and send an RRC connection re-establishment message.

Corresponding to the fourth method of self-optimization shown in FIG. 6, the present invention also provides a kind of self-optimization device. The composition of the device is the same as that of the self-optimization device shown in FIG. 8, and also includes a notification module and a self-optimization module, wherein:

After the device receives the handover request message from other base stations and decides to perform cell splitting or merging before receiving the handover complete message from the UE, the notification module is used to notify the splitting or merging information;

The self-optimization module is used for initiating a handover process to other cells for a UE that is being handed over to a cell to be split or merged, or sending re-establishment information to a corresponding base station.

Corresponding to the fifth method of self-optimization shown in FIG. 7 , the present invention also provides a self-optimization device. The composition of the device is the same as that of the self-optimization device shown in FIG. 8 , and also includes a notification module and a self-optimization module, wherein:

When the device decides to perform cell splitting or merging after receiving the handover request message from other base stations, the notification module is configured to send a handover preparation failure message to the other base stations, which contains the failure cause of cell splitting or merging ;

The self-optimization module is used for initiating a handover process to other cells for a UE that is being handed over to a cell to be split or merged, or sending re-establishment information to a corresponding base station.

It can be seen from the above technical solutions that the self-optimization technical solution provided by the present invention enables coordinated work between different base stations supporting AAS and between base stations that support AAS and those that do not support AAS, supports load balancing, supports self-optimization of mobile robustness, and avoids UE Wireless link failure or handover failure occurs, improving the performance of the mobile communication system.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the present application. within the scope of protection.

Claims (80)

1. a method for self-optimization, characterized in that, comprising: The second base station receives the notification of splitting information or combining information from the first base station; the second base station performs load balancing or handover according to the acquired splitting information or the combining information, Wherein, the splitting information includes the time when the new cell can be used normally; the combining information includes: the time when the new cell can be used normally; The second base station performing load balancing or switching according to the acquired splitting information or the combining information includes: The second base station decides when to configure the measurement of the UE according to the usable time of the new cell, or whether and when to perform handover multi-preparation for the handover UE according to the usable time of the new cell. 2. method according to claim 1, is characterized in that: The splitting information includes: information about a new cell generated by splitting, where the information about the new cell includes one or more of the following information: a cell identity of the new cell, frequency information of the new cell, a tracking area code TAC where the new cell is located, The PLMN ID list broadcast by the new cell, the information of the adjacent cells of the new cell, and the cell identity of the original cell before splitting to generate the new cell; The combination information includes: information of the new cell after the combination, the information of the new cell includes one or more of the following information: the cell identifier of the new cell, the frequency information of the new cell, the TAC where the new cell is located, and the broadcast of the new cell. The PLMN ID list of the new cell, the information of the adjacent cells of the new cell, and the cell identity of the original cell before the merger. 3. The method according to claim 2, wherein the load balancing performed by the second base station according to the acquired splitting information or combining information comprises: A resource status update message including a cell resource measurement result for the new cell is received, and load offload is performed according to the cell resource measurement result of the new cell. 4. The method according to claim 2, wherein the switching by the second base station according to the acquired splitting information or combining information comprises: configuring the UE to measure the new cell; Or send a handover request message, the handover request message includes information of one or more new cells, where the information of the new cells includes: cell identity, keNB star, and short medium access control identity shortMAC-I. 5. A self-optimizing device, comprising: a module for receiving splitting information or combining information notified by the first base station; The self-optimization module is used to perform load balancing or switching according to the obtained split information or merge information; in, The splitting information includes the time when the new cell can be used normally; the combining information includes: the time when the new cell can be used normally; The self-optimization module is configured to decide when to configure the measurement of the UE according to the usable time of the new cell, or to decide whether and when to perform handover multi-preparation for the handover UE according to the usable time of the new cell. 6. The device according to claim 5, wherein: The splitting information includes: information about a new cell generated by splitting, where the information about the new cell includes one or more of the following information: a cell identity of the new cell, frequency information of the new cell, a tracking area code TAC where the new cell is located, The PLMN ID list broadcast by the new cell, the information of the adjacent cells of the new cell, and the cell identity of the original cell before splitting to generate the new cell; The combination information includes: information of the new cell after the combination, the information of the new cell includes one or more of the following information: the cell identifier of the new cell, the frequency information of the new cell, the TAC where the new cell is located, and the broadcast of the new cell. The PLMN ID list of the new cell, the information of the adjacent cells of the new cell, and the cell identity of the original cell before the merger. 7. The device according to claim 6, wherein the self-optimizing module is used for A resource status update message including a cell resource measurement result for the new cell is received, and load offload is performed according to the cell resource measurement result of the new cell. 8. The device according to claim 6, wherein the self-optimization module is used for: configuring the UE to measure the new cell; Or send a handover request message, the handover request message includes information of one or more new cells, where the information of the new cells includes: cell identity, keNB star, and short medium access control identity shortMAC-I. 9. A method for self-optimization, comprising: The second base station receives a notification of the capability information of the first base station under the adaptive antenna system AAS and/or the state information of the first base station cell; The second base station performs load balancing or handover or performs energy saving according to the acquired state information or the capability information; in, The capability information of the first base station cell includes the time when the cell can be used normally; The second base station performing load balancing or switching according to the acquired state information or the capability information includes: The second base station decides when to configure the measurement of the UE according to the usable time of the new cell, or whether and when to perform handover multi-preparation for the handover UE according to the usable time of the new cell. 10. The method according to claim 9, wherein the capability information of the first base station comprises at least one of the following information: Whether the first base station or the first base station cell supports AAS, Whether the first base station or the first base station cell supports beamforming, Whether the first base station or the first base station cell supports cell shaping, Whether the first base station or the first base station cell supports cell splitting, Whether the first base station or the first base station cell supports cell combining. 11. The method of claim 10, wherein: If the first base station or the first base station cell supports cell splitting, the method further includes: the first base station notifying the second base station of the supported cell splitting configuration, and notifying the second base station of the current serving cell and the information of the cells that can be supported by splitting or combining Two base stations. 12. The method of claim 11, wherein: The cell information that can be supported by splitting or merging includes one or more of the following information: The cell ID of the cell, the frequency information of the cell, the TAC where the cell is located, the PLMN ID list broadcast by the cell, the information of the neighboring cells of the cell, and the cell ID of the original cell before splitting or merging. 13. The method of claim 9, wherein: The state information of the first base station cell includes: whether the cell is in an active state, or the cell is in an inactive state, or an AAS active state, or an AAS inactive state, or what kind of cell split state information of AAS. The method according to any one of claims 11 to 13, wherein the load balancing performed by the second base station according to the acquired information comprises: Receive a resource status update message including a cell resource measurement result of the new cell, or receive a cell resource measurement result of a cell that is in an inactive state and can be obtained through cell splitting, and perform load offloading according to the cell resource measurement result; The cell resource measurement result of the new cell includes: cell identity, hardware load indication, S1 transport layer TNL load indication, radio resource indication, comprehensive available capacity group and ABS status; Or, request the corresponding base station to perform AAS cell splitting according to the information. 15. The method according to claim 14, wherein the handover performed by the second base station according to the acquired information comprises: Configure the UE to measure the new cell or make more preparations for handover, and include the information of the new cell in the sent handover request message, where the information of the new cell includes: cell identity, keNB star, short medium access control identity shortMAC-I . 16. A self-optimizing device, which is used for the first base station, comprising: a notification module and a self-optimizing module, wherein: The notification module is used to notify the second base station of the capability information of the first base station under the adaptive antenna system AAS and/or the state information of the cell of the device, so that the second base station can perform the process according to the acquired state information or capability information. load balancing or switching or perform energy saving; in, The capability information of the first base station cell includes the time when the cell can be used normally; The enabling the second base station to perform load balancing or switching according to the acquired state information or the capability information includes: So that the second base station decides when to configure the measurement of the UE according to the usable time of the new cell, or whether and when to perform handover multi-preparation for the handover UE according to the usable time of the new cell. 17. The device according to claim 16, wherein the capability information comprises at least one of the following information: Whether the first base station or the first base station cell supports AAS, Whether the first base station or the first base station cell supports beamforming, Whether the first base station or the first base station cell supports cell shaping, Whether the first base station or the first base station cell supports cell splitting, Whether the first base station or the first base station cell supports cell combining. 18. The apparatus of claim 17, wherein: If the first base station or the cell of the first base station supports cell splitting, the notification module is further configured to notify the second base station of the supported cell splitting configuration, and notify the second base station of the current serving cell and information about the cells that can be supported by splitting or combining base station. 19. The apparatus of claim 18, wherein: The cell information that can be supported by splitting or merging includes one or more of the following information: The cell ID of the cell, the frequency information of the cell, the TAC where the cell is located, the PLMN ID list broadcast by the cell, the information of the neighboring cells of the cell, and the cell ID of the original cell before splitting or merging. 20. The apparatus of claim 16, wherein: The state information includes information about whether the cell is in an active state, or the cell is in an inactive state, or in an AAS active state, or in an AAS inactive state, or what kind of cell split state of AAS. 21. The device according to any one of claims 18 to 20, wherein performing load balancing according to the acquired information comprises: Receive a resource status update message including a cell resource measurement result of the new cell, or receive a cell resource measurement result of a cell that is in an inactive state and can be obtained through cell splitting, and perform load offloading according to the cell resource measurement result; The cell resource measurement result of the new cell includes: cell identity, hardware load indication, S1 transport layer TNL load indication, radio resource indication, comprehensive available capacity group and ABS status; Or, request the corresponding base station to perform AAS cell splitting according to the information. 22. The device according to claim 21, wherein the switching of the second base station according to the acquired information comprises: In order for the second base station to configure the UE to measure the new cell or make more preparations for handover, the handover request message sent includes the information of the new cell, where the information of the new cell includes: cell identity, keNB star, short medium access control Identifies shortMAC-I. 23. A method for self-optimization, comprising: The first base station and/or the second base station generates a UE context for the UE in the connected state in the new cell when the adaptive antenna system AAS operation is performed; The base station receives an RRC connection re-establishment request in the cell, establishes an RRC connection for the UE, and sends an RRC connection re-establishment message; The base station performs the operation of generating the UE context in the new cell when performing the AAS operation when the base station can complete the cell splitting or merging within the time of the clock T311 of the cell. 24. The method according to claim 23, wherein generating the UE context in the new cell when the base station performs the AAS operation comprises: When the base station decides to perform cell splitting on its control cell, a UE context is generated for the UE in the cell before the split in the new cell after splitting; Or, when the base station decides to perform cell merging on its controlled cell, a UE context is generated for the UE in the cell before merging in the new cell after merging; The UE context includes shortMAC-I, KeNB star, and/or the PCI of the source cell where the UE is located. 25. The method of claim 24, wherein: The UE context further includes the C-RNTI of the UE in the new cell. 26. The method of any one of claims 23 to 25, further comprising: Set the T311 clock so that the T311 clock is longer than the time required for AAS operation. 27. A self-optimizing device, comprising: a context management module and a connection management module, wherein: The context management module is used to generate a UE context in a new cell for a UE in a connected state when the device performs an AAS operation; The connection management module is configured to receive an RRC connection re-establishment request from the UE in the cell, establish an RRC connection for the UE, and send an RRC connection re-establishment message; in, The context management module performs the operation of generating the UE context in the new cell when the AAS operation is performed when the cell splitting or merging can be completed within the time of the clock T311 of the cell. 28. The apparatus of claim 27, wherein: When it is decided to perform cell splitting on its control cell, a UE context is generated for the UE in the cell before the split in the new cell after splitting; Or, when it is decided to perform cell merging on its control cell, a UE context is generated for the UE in the cell before merging in the new cell after merging; The UE context includes shortMAC-I, KeNB star, and/or the PCI of the source cell where the UE is located. 29. The apparatus of claim 28, wherein: The UE context further includes the C-RNTI of the UE in the new cell. 30. The device of any one of claims 27 to 29, wherein: In the case that the cell splitting or merging can be completed within the time of the clock T311 of the cell, the operation of generating the UE context in the new cell when performing the AAS operation is performed. 31. A method for self-optimization, comprising: The second base station receives a notification from the first base station of the splitting information or the combining information when it decides to split or combine the cells; The second base station initiates a handover process to other cells for the UE that is being handed over to the cell to be split or merged, or sends re-establishment information to the first base station; If the second base station receives the notification of splitting or merging information sent by the first base station through UE associated signaling, the signaling includes that the reason for the handover failure is cell splitting or merging; if the second base station receives the first base station through UE non-associated signaling The sent split or merge information notification, the signaling includes the state of the cell: the state of the AAS cell split or merged cell or the inactive state. 32. The method of claim 31, wherein: The second base station receives the notification of splitting or merging information sent by the first base station through UE associated signaling or UE non-associated signaling. 33. The method of claim 32, wherein: The UE non-associated signaling is a base station configuration update message. 34. The method of any one of claims 31 to 33, wherein: The re-establishment information includes cell information of all new cells generated by splitting or merging, and the cell information includes cell identity, KeNB star, and shortMAC-I. 35. A self-optimizing device, comprising: a notification module and a self-optimizing module, wherein: After the device receives the handover request message from other base stations and decides to perform cell splitting or merging before receiving the handover complete message from the UE, The notification module is used to notify split or merge information; so that the other base station initiates a handover process to another cell for the UE that is being handed over to the cell to be split or merged, or sends re-establishment information to the corresponding base station; If the notification module notifies the splitting or merging information through UE-associated signaling, the signaling includes that the reason for the handover failure is cell splitting or merging; if the notification module notifies the splitting or merging information through UE non-associated signaling, the The signaling includes the state of the cell: AAS cell split or merged cell state or inactive state. 36. The apparatus of claim 35, wherein: The notification module is used for notification of splitting or merging information sent through UE-associated signaling or UE-non-associated signaling. 37. The device according to claim 36, wherein the UE non-associated signaling is a base station configuration update message. 38. The apparatus of any one of claims 35 to 37, wherein: The re-establishment information includes cell information of all new cells generated by splitting or merging, and the cell information includes cell identity, KeNB star, and shortMAC-I. 39. A method for self-optimization, comprising: The second base station receives the handover preparation failure message sent by the first base station, and the failure reason contained therein is cell splitting or merging; the handover preparation failure message is in the process of cell splitting when the first base station receives the handover request message from the second base station or sent when merging, or, after the first base station receives the handover request message from the second base station and decides to perform cell splitting or merging; The second base station initiates a handover process to other cells for the UE that is being handed over to the cell to be split or merged, or sends re-establishment information to the first base station. 40. The method of claim 39, wherein: The handover preparation failure message further includes split information or merge information. 41. The method according to claim 39, wherein the splitting information or the combining information is sent through UE non-associated signaling. 42. A self-optimizing device, comprising: a notification module and a self-optimizing module, wherein: When the device decides to perform cell splitting or merging after receiving the handover request message from other base stations, the notification module is configured to send a handover preparation failure message to the other base stations, which contains the failure cause of cell splitting or merging ; So that the other base station initiates a handover process to another cell for the UE that is being handed over to the cell to be split or merged, or sends re-establishment information to the corresponding base station. 43. The apparatus of claim 42, wherein: The handover preparation failure message further includes split information or merge information. 44. The device according to claim 42, wherein the splitting information or the combining information is sent through UE non-associated signaling. 45. A method for self-optimization, comprising: The first base station notifies the second base station of the splitting information or the combining information, so that the second base station performs load balancing or handover according to the acquired splitting information or the combining information; in, The splitting information includes the time when the new cell can be used normally; the combining information includes: the time when the new cell can be used normally; The enabling the second base station to perform load balancing or handover according to the acquired splitting information or the combining information includes: So that the second base station decides when to configure the measurement of the UE according to the usable time of the new cell, or whether and when to perform handover multi-preparation for the handover UE according to the usable time of the new cell. 46. The method of claim 45, wherein: The splitting information includes: information about a new cell generated by splitting, where the information about the new cell includes one or more of the following information: a cell identity of the new cell, frequency information of the new cell, a tracking area code TAC where the new cell is located, The PLMN ID list broadcast by the new cell, the information of the adjacent cells of the new cell, and the cell identity of the original cell before splitting to generate the new cell; The combination information includes: information of the new cell after the combination, the information of the new cell includes one or more of the following information: the cell identifier of the new cell, the frequency information of the new cell, the TAC where the new cell is located, and the broadcast of the new cell. The PLMN ID list of the new cell, the information of the adjacent cells of the new cell, and the cell identity of the original cell before the merger. 47. The method according to claim 46, wherein the load balancing performed by the second base station according to the acquired splitting information or combining information comprises: So that the second base station receives the resource status update message including the cell resource measurement result for the new cell, and performs load offloading according to the cell resource measurement result of the new cell. 48. The method according to claim 46, wherein the handover performed by the second base station according to the acquired splitting information or combining information comprises: so that the second base station configures the UE to measure the new cell; Or in order for the second base station to send a handover request message, the handover request message includes information of one or more new cells, wherein the information of the new cells includes: cell identifier, keNB star, short medium access control identifier shortMAC- I. 49. A self-optimizing device, comprising: a notification module, wherein: The notification module is configured to notify the second base station of the splitting information or the combining information; so that the second base station performs load balancing or switching according to the acquired splitting information or combining information; in, The splitting information includes the time when the new cell can be used normally; the combining information includes: the time when the new cell can be used normally; The causing the second base station to perform load balancing or switching according to the acquired splitting information or the combining information includes: So that the second base station decides when to configure the measurement of the UE according to the usable time of the new cell, or whether and when to perform handover multi-preparation for the handover UE according to the usable time of the new cell. 50. The apparatus of claim 49, wherein: The splitting information includes: information about a new cell generated by splitting, where the information about the new cell includes one or more of the following information: a cell identity of the new cell, frequency information of the new cell, a tracking area code TAC where the new cell is located, The PLMN ID list broadcast by the new cell, the information of the adjacent cells of the new cell, the cell identity of the original cell before splitting to generate the new cell, and the time when the new cell can be used normally; The combination information includes: information of the new cell after the combination, the information of the new cell includes one or more of the following information: the cell identifier of the new cell, the frequency information of the new cell, the TAC where the new cell is located, and the broadcast of the new cell. The PLMN ID list of the new cell, the information of the adjacent cells of the new cell, the cell identity of the original cell before the merger, and the time when the new cell can be used normally. 51. The device according to claim 50, wherein enabling the second base station to perform load balancing according to the acquired splitting information or combining information comprises: So that the second base station receives the resource status update message including the cell resource measurement result for the new cell, and performs load offloading according to the cell resource measurement result of the new cell. 52. The device according to claim 50, wherein causing the second base station to perform handover according to the acquired splitting information or combining information comprises: so that the second base station configures the UE to measure the new cell; Alternatively, the second base station sends a handover request message, and the handover request message includes information of one or more new cells, wherein the information of the new cells includes: cell identifier, keNB star, short medium access control identifier shortMAC -I. 53. A method for self-optimization, comprising: The first base station notifies the second base station of the capability information under the adaptive antenna system AAS of the first base station and/or the state information of the first base station cell, so that the second base station performs the operation according to the acquired state information or the capability information. load balancing or switching or perform energy saving; in, The capability information of the first base station cell includes the time when the cell can be used normally; The causing the second base station to perform load balancing or switching according to the acquired state information or the capability information includes: So that the second base station decides when to configure the measurement of the UE according to the time when the new cell can be used, or whether and when to perform handover multi-preparation for the handover UE according to the time when the new cell can be used. 54. The method according to claim 53, wherein the capability information of the first base station comprises at least one of the following information: Whether the first base station or the first base station cell supports AAS, Whether the first base station or the first base station cell supports beamforming, Whether the first base station or the first base station cell supports cell shaping, Whether the first base station or the first base station cell supports cell splitting, Whether the first base station or the first base station cell supports cell combining. 55. The method of claim 54, wherein: If the first base station or the first base station cell supports cell splitting, the method further includes: the first base station notifying the second base station of the supported cell splitting configuration, and notifying the second base station of the current serving cell and the information of the cells that can be supported by splitting or combining Two base stations. 56. The method of claim 55, wherein: The cell information that can be supported by splitting or merging includes one or more of the following information: The cell ID of the cell, the frequency information of the cell, the TAC where the cell is located, the PLMN ID list broadcast by the cell, the information of the neighboring cells of the cell, and the cell ID of the original cell before splitting or merging. 57. The method of claim 53, wherein: The state information of the first base station cell includes: whether the cell is in an active state, or the cell is in an inactive state, or an AAS active state, or an AAS inactive state, or what kind of cell split state information of AAS. 58. The method according to any one of claims 55 to 57, wherein enabling the second base station to perform load balancing according to the acquired information comprises: so that the second base station receives the resource status update message containing the cell resource measurement result of the new cell, or receives the cell resource measurement result of the cell that is in an inactive state and can be obtained through cell splitting, and performs load according to the cell resource measurement result offloading; wherein, the cell resource measurement result of the new cell includes: cell identity, hardware load indication, S1 transport layer TNL load indication, radio resource indication, comprehensive available capacity group and ABS state; Or, request the corresponding base station to perform AAS cell splitting according to the information. 59. The method according to claim 58, wherein causing the second base station to perform handover according to the acquired information comprises: In order to make the second base station configure the UE to measure the new cell or make more preparations for handover, the sent handover request message includes the information of the new cell, wherein the information of the new cell includes: cell identity, keNB star, short media access Control flag shortMAC-I. 60. A self-optimizing device, which is used for the first base station, comprising: a notification module, wherein: The notification module is used to notify the second base station of the capability information under the adaptive antenna system AAS of the first base station and/or the state information of the first base station cell; so that the second base station obtains the state information or capability according to the information for load balancing or switching or to perform energy savings; in, The capability information of the first base station cell includes the time when the cell can be used normally; The causing the second base station to perform load balancing or switching according to the acquired state information or the capability information includes: So that the second base station decides when to configure the measurement of the UE according to the time when the new cell can be used, or whether and when to perform handover multi-preparation for the handover UE according to the time when the new cell can be used. 61. The device according to claim 60, wherein the capability information comprises at least one of the following information: Whether the first base station or the first base station cell supports AAS, Whether the first base station or the first base station cell supports beamforming, Whether the first base station or the first base station cell supports cell shaping, Whether the first base station or the first base station cell supports cell splitting, Whether the first base station or the first base station cell supports cell combining. 62. The apparatus of claim 61, wherein: If the first base station or the cell of the first base station supports cell splitting, the notification module is further configured to notify the second base station of the supported cell splitting configuration, and notify the second base station of the current serving cell and information about the cells that can be supported by splitting or combining base station. 63. The apparatus of claim 62, wherein: The cell information that can be supported by splitting or merging includes one or more of the following information: The cell ID of the cell, the frequency information of the cell, the TAC where the cell is located, the PLMN ID list broadcast by the cell, the information of the cells adjacent to the cell, the cell ID of the original cell before splitting or merging, and the time when the cell can be used normally. 64. The apparatus of claim 61, wherein: The state information includes information about whether the cell is in an active state, or the cell is in an inactive state, or in an AAS active state, or in an AAS inactive state, or what kind of cell split state of AAS. 65. The device according to any one of claims 62 to 64, wherein enabling the second base station to perform load balancing according to the acquired information comprises: so that the second base station receives the resource status update message containing the cell resource measurement result of the new cell, or receives the cell resource measurement result of the cell that is in an inactive state and can be obtained through cell splitting, and performs load according to the cell resource measurement result offloading; wherein, the cell resource measurement result of the new cell includes: cell identity, hardware load indication, S1 transport layer TNL load indication, radio resource indication, comprehensive available capacity group and ABS state; Or, request the corresponding base station to perform AAS cell splitting according to the information. 66. The device according to claim 65, wherein causing the second base station to perform handover according to the acquired information comprises: In order to make the second base station configure the UE to measure the new cell or make more preparations for handover, the sent handover request message includes the information of the new cell, wherein the information of the new cell includes: cell identity, keNB star, short media access Control flag shortMAC-I. 67. A method of self-optimization, comprising: The first base station decides to perform cell splitting or merging, and the first base station notifies the second base station of the splitting or merging information, so that the second base station initiates a handover process to other cells or sends a re-establishment to the UE that is being handed over to the cell to be split or merged information to the first base station; in, If the first base station notifies the second base station of splitting information or merging information through UE-associated signaling, the signaling includes that the reason for the handover failure is cell splitting or merging; The second base station is notified of splitting information or merging information, and the signaling includes the state of the cell: the state of the AAS cell splitting or merging cell or the inactive state. 68. The method of claim 67, wherein: The first base station is notified of splitting or merging information sent by UE associated signaling or UE non-associated signaling. 69. The method of claim 68, wherein the UE non-associated signaling is a base station configuration update message. 70. The method of any one of claims 67 to 69, wherein: The re-establishment information includes cell information of all new cells generated by splitting or merging, and the cell information includes cell identity, KeNB star, and shortMAC-I. 71. A self-optimizing device, comprising: a notification module, wherein: After receiving the handover request message from the other base station and before receiving the handover complete message from the UE and deciding to perform cell splitting or merging, the notification module is configured to notify the other base station of the splitting or merging information, so that the other base station initiates a handover process to another cell for the UE that is being handed over to the cell to be split or merged, or sends re-establishment information to the corresponding base station; in, If the notification module notifies the other base stations of splitting or merging information through UE-associated signaling, the signaling includes that the reason for the handover failure is cell splitting or merging; Or the merging information is notified to the other base stations, and the signaling includes that the state of the cell is: AAS cell splitting or merging cell state or inactive state. 72. The apparatus of claim 71, wherein: The notification module is configured to send a notification of splitting or merging information through UE associated signaling or UE non-associated signaling. 73. The device according to claim 72, wherein the UE non-associated signaling is a base station configuration update message. 74. The apparatus of any one of claims 71 to 73, wherein: The re-establishment information includes cell information of all new cells generated by splitting or merging, and the cell information includes cell identity, KeNB star, and shortMAC-I. 75. A method of self-optimization, comprising: When the first base station receives the handover request message from the second base station, it is in the process of cell splitting or merging, or, after receiving the handover request message from the second base station, the first base station decides to perform cell splitting or merging, and the first base station sends Prepare a failure message to the second base station, which contains the failure reason for cell splitting or merging; so that the second base station initiates a handover process to other cells for the UE that is being handed over to the cell to be split or merged or sends re-establishment information to the first base station. base station. 76. The method of claim 75, wherein: The handover preparation failure message further includes split information or merge information. 77. The method according to claim 75, wherein the splitting information or the combining information is sent through UE non-associated signaling. 78. A self-optimizing device, comprising: a notification module, wherein: When the device decides to perform cell splitting or merging after receiving the handover request message from other base stations, the notification module is configured to send a handover preparation failure message to the other base stations, which contains the failure cause of cell splitting or merging , so that the other base station initiates a handover process to another cell for the UE that is being handed over to the cell to be split or merged, or sends re-establishment information to the corresponding base station. 79. The apparatus of claim 78, wherein: The handover preparation failure message further includes split information or merge information. 80. The device according to claim 78, wherein the splitting information or the combining information is sent through UE non-associated signaling.

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