CN107548166A - Configure method, master base station, user equipment and the communication system of multi-link signaling - Google Patents

Abstract

The present invention provides a method for configuring multi-connection signaling, a main base station, user equipment and a communication system. The present invention determines the execution order of sending an RRC connection reconfiguration complete message by UE and initiating a random access procedure on SeNB by MeNB , and indicate the execution order to the UE through the RRC connection reconfiguration message, so that the UE can be controlled to send the RRC connection reconfiguration complete message and initiate the random access process on the SeNB according to the set execution order, realizing the above two Configuration of the execution order of an action. Moreover, the present invention can also determine the execution sequence according to the service quality of the business and the amount of forwarded data, so as to meet the actual needs of different businesses.

Description

Method for configuring multi-connection signaling, main base station, user equipment and communication system

technical field

The present invention relates to a wireless communication system, in particular to a method for configuring multi-connection signaling, a master base station, user equipment and a communication system.

Background technique

With the continuous development of communication technology, users need the network to provide more convenient and faster large-traffic data communication services. In order to meet the needs of users, the communication network architecture needs to be continuously evolved and enhanced. In order to meet this demand, the 3rd Generation Partnership Project (3GPP, The 3rd Generation Partnership Project) proposed in the R12 version a network architecture in which several micro base stations are added within the coverage of the macro base station, which is the so-called dual connection (multi-connection) architecture. . In this system, user equipment (UE) can maintain connections with two (or more) base stations at the same time to perform uplink and downlink communication. Among the two (or more) base stations that maintain connection with the user at the same time, one base station is the master base station (MeNB), which is responsible for managing the system, and the other base stations are SeNBs.

In the signaling process of adding dual connectivity (multi-connection), after MeNB and SeNB have negotiated that dual connectivity (multi-connection) needs to be added, MeNB notifies the user equipment in the connected state through the RRC reconfiguration signaling process to complete the connection between the user equipment and the SeNB. The addition of connections between them (that is, the addition of SeNBs). The flow of SeNB addition stipulated in the existing standard protocol is shown in Figure 1:

101. When the MeNB requests the SeNB to allocate radio resources for a specific Evolved-Radio Access Bearer (E-RAB, Evolved-RadioAccess Bearer), it sends a SeNB Addition Request (SeNB Addition Request) message to the SeNB, which must carry the relevant E-RAB - RAB characteristic parameters, such as E-RAB related parameters, Transport Network Layer (TNL, Transport Network Layre) address information corresponding to the bearer type, etc. In addition, the MeNB also needs to carry the MeNB configuration information and UE capability information in the SCG-ConfigInfo in the SeNB addition request message, and these information are used as the basic information for the SeNB to configure. In addition, the MeNB also needs to provide measurement results of cells to be added as Secondary Cell Group (SCG, Secondary Cell Group).

102. If the radio resource management module of the SeNB can accept the admission request, it will allocate corresponding radio resources and transmission network resources. In order to achieve synchronization between the UE and the SeNB, the SeNB will allocate corresponding access resources. The SeNB sends a SeNB Addition Request Acknowledge (SeNB Addition Request Acknowledge) message to the MeNB, and carries new SCG configuration information in the SCG-Config in the message. If it is SCG bearer, SeNB also needs to provide S1DL TNL address information and security algorithm; if it is split bearer, it also needs to provide X2DL TNL address information. According to the 3GPP TS 36.331 standard definition, the SCG configuration information defined by the cell SCG-Config includes the following content:

103. If the MeNB accepts the new configuration in the SeNB addition request confirmation message sent by the SeNB, the MeNB will send an RRC Connection Reconfiguration (RRCConnectionReconfiguration) message to the UE, and carry the new SCG radio corresponding to the SCG-Config in the message. Resource configuration information.

104. The UE uses the new SCG radio resource configuration information, and returns an RRC Connection Reconfiguration Complete (RRCConnectionReconfigurationComplete) message to the MeNB. If the UE cannot complete all or part of the RRC Connection Reconfiguration (RRCConnectionReconfiguration) configuration, the UE performs a reconfiguration failure procedure.

105. The MeNB notifies the SeNB that the UE has successfully completed the reconfiguration process.

106. The UE initiates a random access procedure on the SeNB, accesses the second primary cell (PSCell, Primary Secondary Cell) of the SeNB, and completes synchronization with the SeNB.

107-108. If it is carried by SCG, according to the characteristics of the specified E-RAB, MeNB needs to actively reduce the service interruption caused by dual connectivity activation (need to perform SN state transmission (107) and service data forwarding (108)).

109-112. For the bearer of the SCG, an uplink path update procedure with the EPC needs to be performed.

In the existing protocol, there is no definition for the execution sequence between the UE sending the RRC connection reconfiguration complete message and the UE initiating the random access procedure on the SeNB.

Contents of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a method for configuring multi-connection signaling, a master base station, user equipment, and a communication system, so as to realize that during the multi-connection configuration process, the UE is configured to send an RRC connection reconfiguration complete message and The sequence of execution between random access procedures initiated by the UE on the SeNB.

In order to solve the above technical problems, the method for configuring multi-connection signaling provided by the embodiment of the present invention includes:

The main base station MeNB of a user equipment UE, after receiving the SeNB addition request confirmation message sent by the secondary base station SeNB, determines the execution sequence of the UE sending the RRC connection reconfiguration complete message and initiating the random access procedure on the SeNB;

The MeNB sends to the UE an RRC connection reconfiguration message for increasing the connection between the UE and the SeNB, and the RRC connection reconfiguration message carries the indication information of the execution sequence.

Preferably, in the above method, the step of determining the execution sequence of the UE sending the RRC connection reconfiguration complete message and initiating the random access procedure on the SeNB includes:

The execution sequence is determined according to the service quality carried by the SeNB and the amount of data that the service needs to forward to the SeNB.

Preferably, in the above method, the step of determining the execution order according to the service quality carried by the SeNB and the amount of data that the service needs to forward to the SeNB includes:

When the quality of service of the service indicates that the service is a predefined service that is sensitive to delay and not sensitive to packet loss rate, determine that the execution order is to send the RRC connection reconfiguration complete message first, and then initiate it on the SeNB The random access process;

When the quality of service of the business indicates that the business is a predefined business that is not sensitive to delay and sensitive to packet loss rate, if the amount of data that needs to be forwarded exceeds a preset threshold, the execution sequence is determined to be Send the RRC connection reconfiguration complete message first, and then initiate the random access process on the SeNB; otherwise, determine the execution sequence as first initiating the random access process on the SeNB, and then send the RRC connection reconfiguration complete message.

Preferably, in the above method, the step of determining the execution order according to the service quality carried by the SeNB and the amount of data that the service needs to forward to the SeNB further includes:

When the quality of service of the service indicates that the service is a predefined service that is sensitive to delay and packet loss rate, or a service that is not sensitive to delay and packet loss rate, determine that the execution sequence is predetermined Set the default order.

The embodiment of the present invention also provides another method for configuring multi-connection signaling, including:

The user equipment UE receives the RRC connection reconfiguration message sent by the main base station MeNB for increasing the connection between the UE and the SeNB. The RRC connection reconfiguration message carries the RRC connection reconfiguration complete message sent by the UE and the message initiated on the SeNB. Indication information of the execution sequence of the random access procedure;

The UE sends the RRC connection reconfiguration complete message and initiates a random access procedure on the SeNB according to the execution order indicated by the indication information.

Preferably, in the above method, the execution sequence is determined according to the service quality carried by the SeNB and the amount of data that the service needs to forward to the SeNB.

The embodiment of the present invention also provides a primary base station, including:

A sequence determining unit, configured to determine the execution sequence of the UE sending the RRC connection reconfiguration complete message and initiating the random access procedure on the SeNB after receiving the SeNB addition request confirmation message sent by the secondary base station SeNB;

A message sending unit, configured to send an RRC connection reconfiguration message for increasing the connection between the UE and the SeNB to the UE, where the RRC connection reconfiguration message carries indication information of the execution order.

Preferably, in the above primary base station, the order determining unit is specifically configured to determine the execution order according to the service quality carried by the SeNB and the amount of data that the service needs to forward to the SeNB.

Preferably, in the above primary base station, the order determining unit includes:

The first processing unit is configured to determine that the execution order is to send RRC connection reconfiguration first when the service quality of the service indicates that the service is a predefined service that is sensitive to delay and not sensitive to packet loss rate message, and then initiate the random access procedure on the SeNB;

The second processing unit is configured to, when the service quality of the service indicates that the service is a predefined service that is not sensitive to delay and sensitive to packet loss rate, if the amount of data that needs to be forwarded exceeds a preset threshold, Then determine that the execution sequence is to first send the RRC connection reconfiguration complete message, and then initiate the random access process on the SeNB; otherwise, determine that the execution sequence is to first initiate the random access process on the SeNB, and then send the RRC connection Reconfiguration complete message.

Preferably, in the above primary base station, the order determining unit further includes:

The third processing unit is configured to, when the quality of service of the service indicates that the service is a predefined service that is sensitive to delay and packet loss rate, or a service that is not sensitive to delay and packet loss rate, It is determined that the execution sequence is a preset default sequence.

The embodiment of the present invention also provides a user equipment, including:

The receiving unit is configured to receive an RRC connection reconfiguration message sent by the main base station MeNB for increasing the connection between the user equipment UE and the SeNB. The RRC connection reconfiguration message carries the RRC connection reconfiguration complete message sent by the UE and the message initiated in the Indication information of the execution sequence of the random access procedure on the SeNB;

A control processing unit, configured to send the RRC connection reconfiguration complete message and initiate a random access procedure on the SeNB according to the execution sequence indicated by the indication information.

Preferably, in the above user equipment, the execution order is determined according to the service quality carried by the SeNB and the amount of data that the service needs to forward to the SeNB.

An embodiment of the present invention also provides a communication system, including the above-mentioned primary base station and user equipment.

Compared with the prior art, in the method for configuring multi-connection signaling provided by the embodiment of the present invention, the main base station, the user equipment and the communication system, the MeNB determines that the UE sends an RRC connection reconfiguration complete message and initiates random access on the SeNB The execution order of the process, and indicate the execution order to the UE through the RRC connection reconfiguration message, so that the UE can be controlled to send the RRC connection reconfiguration complete message and initiate the random access process on the SeNB according to the set execution order, so as to realize Configure the execution order of the above two actions. In addition, the embodiment of the present invention can also determine the execution order according to the quality of service of the business and the amount of forwarded data, so as to meet the actual needs of different businesses. In addition, the embodiment of the present invention can be compatible with existing standard signaling procedures by carrying the indication information of the execution order in the RRC connection reconfiguration message, and is easy to implement.

Description of drawings

FIG. 1 is a schematic flow diagram of SeNB addition in the prior art;

FIG. 2 is a schematic flowchart of a method for configuring multi-connection signaling provided by an embodiment of the present invention;

FIG. 3 is another schematic flowchart of a method for configuring multi-connection signaling provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a primary base station provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a UE provided by an embodiment of the present invention.

detailed description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments. In the following description, specific details, such as specific configurations and components, are provided only to assist in a comprehensive understanding of the embodiments of the present invention. Accordingly, those of ordinary skill in the art should recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be understood that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Thus, appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the order of execution, and the order of execution of each process should be determined by its functions and internal logic, rather than implementing the present invention. The implementation of the examples constitutes no limitation. Additionally, the terms "system" and "network" are often used interchangeably herein.

In the embodiment of the present invention, the form of the base station is not limited, and it can be a macro base station (Macro Base Station), a micro base station (Pico Base Station), Node B (the name of the 3G mobile base station), an enhanced base station (ENB), and a home enhanced base station. Base station (Femto eNB or Home eNode B or Home eNB or HNEB), relay station, access point, RRU (Remote Radio Unit, remote radio frequency module), RRH (Remote Radio Head, remote radio head), etc. The terminal can be a mobile phone (or cell phone), or other equipment capable of sending or receiving wireless signals, including user equipment (UE), personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, Cordless phones, wireless local loop (WLL) stations, CPE (Customer Premise Equipment, customer terminals) that can convert mobile signals into WiFi signals or mobile smart hotspots, smart home appliances, or other mobile communications that can spontaneously communicate with mobile devices without human operation equipment for network communication, etc.

As shown in Figure 1, the existing protocol does not specify the execution sequence between UE sending the RRC connection reconfiguration complete message and UE initiating the random access procedure on the SeNB, and the RRC connection reconfiguration complete message may trigger the MeNB to perform Data forwarding and path update process.

The inventors found that when the UE first sends the RRC connection reconfiguration complete message, and then initiates the random access process on the SeNB (initiating the random access RA process), if the RRC connection reconfiguration complete message triggers the MeNB to perform the data forwarding process, this If the RA time is too long or the RA fails, the forwarded data and the ACK/NCAK of the new data from the EPC may not be sent to the SeNB in time, resulting in data accumulation, which may trigger the re-establishment of the RRC connection in severe cases.

When the UE first initiates the random access process on the SeNB, and then sends the RRC connection reconfiguration completion message after the synchronization process is successful, the data that needs to be forwarded at this time is delayed, which will increase service interruption for some services time.

From the above analysis, it can be seen that the existing technology does not specify the execution sequence between the UE sending the RRC connection reconfiguration complete message and the UE initiating the random access procedure on the SeNB, but in some scenarios it may be desirable to execute a specific sequence, for For this problem, the present invention proposes an improved scheme for configuring the process of SeNB, which can configure the above-mentioned execution sequence, and control the UE to perform corresponding actions according to the above-mentioned execution sequence.

Please refer to FIG. 2, the method for configuring multi-connection signaling provided by the embodiment of the present invention, as shown in FIG. 2, the method includes the following steps:

Step 21, after receiving the SeNB addition request confirmation message sent by the secondary base station SeNB, the MeNB of the UE determines the execution sequence of the UE sending the RRC connection reconfiguration complete message and initiating the random access procedure on the SeNB.

Here, the embodiments of the present invention can be specifically applied to the process in which the MeNB of the UE adds a SeNB for the UE. For example, after the MeNB receives the SeNB addition request confirmation message sent by the SeNB, if the MeNB accepts the SeNB addition request confirmation message carried in the SeNB addition request confirmation message SCG configuration information (for the content of the SCG configuration information, please refer to the background technology section above), then determine the steps between sending the RRC connection reconfiguration complete message and initiating the random access process on the SeNB that the UE needs to perform subsequently. Execution order.

In step 22, the MeNB sends to the UE an RRC connection reconfiguration message for increasing the connection between the UE and the SeNB, and the RRC connection reconfiguration message carries indication information of the execution sequence.

Here, the indication information of the execution order may be carried in the RRC connection reconfiguration message of the existing SeNB addition process, for example, a new information element (IE) is added in the message. Of course, in this embodiment of the present invention, the indication information may also be sent through other signaling/messages. Here, a specific implementation of adding an IE in the RRC connection reconfiguration message to send indication information is further given: a new IE is added in the PSCellToAddMod-r12 field in the RRC connection reconfiguration message, such as ReconfigurationCompleteSendDirectly, for indicating Execution sequence of RRC connection reconfiguration complete message and synchronization with SENB. For example, when ReconfigurationCompleteSendDirectly is 0, first execute the synchronization process, and then send the RRC connection reconfiguration complete message; when ReconfigurationCompleteSendDirectly is 1, first send the RRC connection reconfiguration complete message, and then execute the synchronization process.

In the embodiment of the present invention, through the above steps, during the UE dual connectivity (or multi-connection) configuration process, the MeNB determines the execution sequence of the UE sending the RRC connection reconfiguration complete message and initiating the random access process on the SeNB, and Indicate the execution order to the UE through the RRC connection reconfiguration message, so that the UE can be controlled to send the RRC connection reconfiguration complete message and initiate the random access process on the SeNB according to the set execution order, realizing the above two actions The configuration of the execution order. In addition, the embodiment of the present invention can be compatible with the signaling flow of the existing standard by carrying the indication information of the execution sequence in the RRC connection reconfiguration message, and the modification to the existing standard is minor.

Considering that different services have different requirements on delay/packet loss rate, in the embodiment of the present invention, in the above step 21, further according to the service quality carried by the SeNB and the amount of data that the service needs to forward to the SeNB, determine the the order of execution. The service carried by the SeNB is the service carried on the connection between the UE and the SeNB, and the service quality (QoS) of the service can be determined directly according to the service quality level identifier (QCI) of the service, of course, it can also be preset It is determined that different business types have different service quality, and then determine the service quality of the business according to the business type.

When determining the execution order, a specific implementation method provided by the embodiment of the present invention is as follows:

1) If the quality of service of the service indicates that the service is a predefined service that is sensitive to delay and not sensitive to packet loss rate, then determine that the execution order is to first send the RRC connection reconfiguration complete message, and then initiate the Random access procedure on SeNB.

2) If the quality of service of the business indicates that the business is a predefined business that is not sensitive to delay and sensitive to packet loss rate, then further judge whether the amount of data that needs to be forwarded exceeds a preset threshold: if it exceeds, Then determine that the execution sequence is to first send the RRC connection reconfiguration complete message, and then initiate the random access process on the SeNB; otherwise, determine that the execution sequence is to first initiate the random access process on the SeNB, and then send the RRC connection Reconfiguration complete message.

3) If the service quality of the service indicates that the service is a predefined service that is sensitive to both delay and packet loss rate, or is a service that is not sensitive to delay and packet loss rate, then determine the execution sequence is the preset default order. The default sequence may be to send the RRC connection reconfiguration complete message first, and then initiate the random access procedure on the SeNB. The default sequence may be to first initiate the random access procedure on the SeNB, and then send the RRC connection reconfiguration complete message. Of course, the execution order may not be set here, but may be performed according to the processing method in the prior art.

Taking the newly added IE (ReconfigurationCompleteSendDirectly) as an example, for example, when ReconfigurationCompleteSendDirectly is set to 1, it can indicate to send the RRC connection reconfiguration complete message first, and then initiate the random access process on the SeNB; and after setting ReconfigurationCompleteSendDirectly to When 0, it can indicate that the random access procedure on the SeNB is initiated first, and then the RRC connection reconfiguration complete message is sent.

Through the above processing, the embodiment of the present invention can determine the execution order according to the service quality of the service and the amount of forwarded data, so as to meet the actual requirements of different services.

Please refer to FIG. 3. The embodiment of the present invention also provides a flow chart of a method for configuring multi-connection signaling applied to the UE side. As shown in FIG. 3, the method includes:

Step 31, the UE receives the RRC connection reconfiguration message sent by the main base station MeNB for increasing the connection between the UE and the SeNB, the RRC connection reconfiguration message carries the RRC connection reconfiguration complete message sent by the UE and the message initiated by the SeNB The indication information of the execution order of the random access procedure on the above.

Here, the execution sequence is determined according to the service quality carried by the SeNB and the amount of data that the service needs to forward to the SeNB. Specifically, the determination may be made with reference to the foregoing manner, and details are not repeated here.

Step 32, the UE sends the RRC connection reconfiguration complete message and initiates a random access procedure on the SeNB according to the execution sequence indicated by the indication information.

Here, the UE determines the order of sending the RRC connection reconfiguration complete message and initiating the random access procedure on the SeNB according to the execution sequence, and then decides whether to send the RRC connection reconfiguration complete message first or initiate the random access procedure on the SeNB random access process.

Referring to Fig. 4, an embodiment of the present invention provides a main base station for implementing the above method, and the main base station includes:

The order determining unit 41 is configured to, after receiving the SeNB addition request confirmation message sent by the secondary base station SeNB, determine the execution order of the UE sending the RRC connection reconfiguration complete message and initiating the random access procedure on the SeNB;

The message sending unit 42 is configured to send to the UE an RRC connection reconfiguration message for increasing the connection between the UE and the SeNB, where the RRC connection reconfiguration message carries indication information of the execution sequence.

Here, the order determining unit 41 is specifically configured to determine the execution order according to the service quality carried by the SeNB and the amount of data that the service needs to forward to the SeNB.

Specifically, the order determining unit 41 may include:

The first processing unit is configured to determine that the execution order is to send RRC connection reconfiguration first when the service quality of the service indicates that the service is a predefined service that is sensitive to delay and not sensitive to packet loss rate message, and then initiate the random access procedure on the SeNB;

The second processing unit is configured to, when the service quality of the service indicates that the service is a predefined service that is not sensitive to delay and sensitive to packet loss rate, if the amount of data that needs to be forwarded exceeds a preset threshold, Then determine that the execution sequence is to first send the RRC connection reconfiguration complete message, and then initiate the random access process on the SeNB; otherwise, determine that the execution sequence is to first initiate the random access process on the SeNB, and then send the RRC connection Reconfiguration complete message;

The third processing unit is configured to, when the quality of service of the service indicates that the service is a predefined service that is sensitive to delay and packet loss rate, or a service that is not sensitive to delay and packet loss rate, It is determined that the execution sequence is a preset default sequence.

Referring to FIG. 5, an embodiment of the present invention provides a UE implementing the above method, and the UE includes:

The receiving unit 51 is configured to receive an RRC connection reconfiguration message sent by the main base station MeNB for increasing the connection between the user equipment UE and the SeNB, the RRC connection reconfiguration message carries the RRC connection reconfiguration complete message sent by the UE and the initiation Indication information of the execution sequence of the random access procedure on the SeNB;

The control processing unit 52 is configured to send the RRC connection reconfiguration complete message and initiate a random access procedure on the SeNB according to the execution sequence indicated by the indication information.

Here, the execution sequence is determined according to the service quality carried by the SeNB and the amount of data that the service needs to forward to the SeNB.

Finally, an embodiment of the present invention also provides a communication system, which includes the above-mentioned primary base station and user equipment. To save space, the structures of the primary base station and the user equipment are not described in detail here.

In summary, in the embodiment of the present invention, the MeNB determines the execution order of the UE sending the RRC connection reconfiguration complete message and initiating the random access procedure on the SeNB, and indicates the execution order to the UE through the RRC connection reconfiguration message, so that The UE can be controlled to send the RRC connection reconfiguration complete message and initiate the random access process on the SeNB according to the set execution order, realizing the configuration of the execution order of the above two actions. In addition, the embodiment of the present invention can also determine the execution order according to the quality of service of the business and the amount of forwarded data, so as to meet the actual needs of different businesses. In addition, the embodiment of the present invention can be compatible with existing standard signaling procedures by carrying the indication information of the execution order in the RRC connection reconfiguration message, and is easy to implement.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, these improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (13)

1. A method for configuring multi-connection signaling, comprising: The main base station MeNB of a user equipment UE, after receiving the SeNB addition request confirmation message sent by the secondary base station SeNB, determines the execution sequence of the UE sending the RRC connection reconfiguration complete message and initiating the random access procedure on the SeNB; The MeNB sends to the UE an RRC connection reconfiguration message for increasing the connection between the UE and the SeNB, and the RRC connection reconfiguration message carries the indication information of the execution sequence. 2. The method according to claim 1, wherein the step of determining the execution sequence of the UE sending the RRC connection reconfiguration complete message and initiating the random access procedure on the SeNB comprises: The execution sequence is determined according to the service quality carried by the SeNB and the amount of data that the service needs to forward to the SeNB. 3. The method according to claim 2, wherein the step of determining the execution sequence according to the service quality carried by the SeNB and the amount of data that the service needs to forward to the SeNB includes: When the quality of service of the service indicates that the service is a predefined service that is sensitive to delay and not sensitive to packet loss rate, determine that the execution order is to send the RRC connection reconfiguration complete message first, and then initiate it on the SeNB The random access process; When the quality of service of the business indicates that the business is a predefined business that is not sensitive to delay and sensitive to packet loss rate, if the amount of data that needs to be forwarded exceeds a preset threshold, the execution sequence is determined to be Send the RRC connection reconfiguration complete message first, and then initiate the random access process on the SeNB; otherwise, determine the execution sequence as first initiating the random access process on the SeNB, and then send the RRC connection reconfiguration complete message. 4. The method according to claim 3, wherein the step of determining the execution sequence according to the service quality carried by the SeNB and the amount of data that the service needs to forward to the SeNB further comprises: When the quality of service of the service indicates that the service is a predefined service that is sensitive to delay and packet loss rate, or a service that is not sensitive to delay and packet loss rate, determine that the execution sequence is predetermined Set the default order. 5. A method for configuring multi-connection signaling, comprising: The user equipment UE receives the RRC connection reconfiguration message sent by the main base station MeNB for increasing the connection between the UE and the SeNB. The RRC connection reconfiguration message carries the RRC connection reconfiguration complete message sent by the UE and the message initiated on the SeNB. Indication information of the execution sequence of the random access procedure; The UE sends the RRC connection reconfiguration complete message and initiates a random access procedure on the SeNB according to the execution order indicated by the indication information. 6. The method according to claim 5, wherein the execution order is determined according to the service quality carried by the SeNB and the amount of data that the service needs to forward to the SeNB. 7. A primary base station, comprising: The sequence determination unit is configured to determine the execution sequence of the UE sending the RRC connection reconfiguration complete message and initiating the random access procedure on the SeNB after receiving the SeNB addition request confirmation message sent by the secondary base station SeNB; A message sending unit, configured to send an RRC connection reconfiguration message for increasing the connection between the UE and the SeNB to the UE, where the RRC connection reconfiguration message carries indication information of the execution sequence. 8. The main base station according to claim 7, wherein the order determining unit is specifically configured to determine the execution order according to the service quality carried by the SeNB and the amount of data that the service needs to forward to the SeNB. order. 9. The main base station according to claim 8, wherein the order determining unit comprises: The first processing unit is configured to determine that the execution order is to send RRC connection reconfiguration first when the service quality of the service indicates that the service is a predefined service that is sensitive to delay and not sensitive to packet loss rate message, and then initiate the random access procedure on the SeNB; The second processing unit is configured to, when the service quality of the service indicates that the service is a predefined service that is not sensitive to delay and sensitive to packet loss rate, if the amount of data that needs to be forwarded exceeds a preset threshold, Then determine that the execution sequence is to first send the RRC connection reconfiguration complete message, and then initiate the random access process on the SeNB; otherwise, determine that the execution sequence is to first initiate the random access process on the SeNB, and then send the RRC connection Reconfiguration complete message. 10. The primary base station according to claim 9, wherein the order determining unit further comprises: The third processing unit is configured to, when the quality of service of the service indicates that the service is a predefined service that is sensitive to delay and packet loss rate, or a service that is not sensitive to delay and packet loss rate, It is determined that the execution sequence is a preset default sequence. 11. A user equipment, characterized in that, comprising: The receiving unit is configured to receive an RRC connection reconfiguration message sent by the main base station MeNB for increasing the connection between the user equipment UE and the SeNB. The RRC connection reconfiguration message carries the RRC connection reconfiguration complete message sent by the UE and the message initiated in the Indication information of the execution sequence of the random access procedure on the SeNB; A control processing unit, configured to send the RRC connection reconfiguration complete message and initiate a random access procedure on the SeNB according to the execution sequence indicated by the indication information. 12. The user equipment according to claim 11, wherein the execution sequence is determined according to the service quality carried by the SeNB and the amount of data that the service needs to forward to the SeNB. 13. A communication system, comprising the master base station according to any one of claims 7-10, and the user equipment according to any one of claims 11-12.