Communication system and method based on off-site disaster recovery networking

Abstract

The embodiment of the application provides a kind of communication system and method based on off-site disaster recovery networking, including first device, second device and base station, first device includes first cluster function network element belonging to first cluster core network and second cluster function network element belonging to second cluster core network, two cluster function network elements are main and standby mechanism, and communication connection;Base station is connected with second device by S1-T interface;Second device is connected with two cluster function network elements by internal interface.The second device is used to send communication message to the new main cluster function network element by internal interface when receiving the main and standby switching information transmitted by internal interface, so that cluster terminal and data terminal communicate with the current main cluster function network element.The application effectively avoids the problem of terminal communication interruption, improves user experience, and does not need to introduce main and standby notification mechanism in S1-T interface of base station, which can save the cost of existing single cluster core network modification.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication system and method based on off-site disaster recovery networking. Background Technology

[0002] Broadband Trunking Communication (B-TrunC) is a standard for private broadband trunking systems based on TD-LTE, which combines LTE digital transmission with trunked voice communication. It was developed by the Broadband Trunking Industry Alliance.

[0003] In the B-TrunC line headings, a remote disaster recovery network can be defined. This network includes two trunking core networks (TCNs): TCN 1 and TCN 2. Specifically, TCN 1 and TCN 2 operate on a 1+1 primary / backup configuration, meaning one TCN is the primary and the other is the backup.

[0004] However, existing methods require base stations connected to the cluster core network to support a 1+1 primary / backup configuration. Converting an existing network to the aforementioned off-site disaster recovery network requires significant manpower and physical resources. Furthermore, during the operation of this off-site disaster recovery network, if the primary cluster core network fails, the base station needs to reconnect the terminal to the new primary cluster core network. Since reconnecting to the core network takes time, communication interruptions may occur, preventing the terminal from accessing network services and degrading the user experience. Summary of the Invention

[0005] This application provides a communication system and method based on off-site disaster recovery networking, which enables a primary and backup mechanism between the first cluster functional network element and the second cluster functional network element. When the primary cluster functional network element fails, the second device can directly communicate with the new primary cluster core network through the internal interface, which can ensure that the network communication of the terminal device is not interrupted and effectively improve the user experience.

[0006] In a first aspect, embodiments of this application provide a communication system based on off-site disaster recovery networking, comprising:

[0007] The device comprises a first device, a second device, and a base station. The first device includes a first cluster function network element belonging to the first cluster core network and a second cluster function network element belonging to the second cluster core network. The first cluster function network element and the second cluster function network element are connected by a primary / backup mechanism.

[0008] The first cluster function network element and the second cluster function network element are connected for communication.

[0009] The base station and the second device are connected via an S1-T interface.

[0010] The second device is connected to both the first and second cluster function network elements via internal interfaces.

[0011] The second device is used to send the received communication message sent by the base station to the new primary cluster function network element through the internal interface when it receives the primary / backup switching information transmitted by the first cluster function network element and the second cluster function network element through the internal interface, so that the cluster terminal and the data terminal can communicate with the current primary cluster function network element.

[0012] In one possible implementation, the second device includes a first sub-device and / or a second sub-device.

[0013] The first sub-device includes a first evolved mobility management entity belonging to the first cluster core network, and the second sub-device includes a second evolved mobility management entity belonging to the second cluster core network.

[0014] The first evolved mobility management entity is used to transmit and receive control plane information between the base station and the main cluster function network element.

[0015] The second evolved mobility management entity is used to transmit and receive control plane information between the base station and the main cluster function network element.

[0016] The first sub-device and the second sub-device constitute a POOL network.

[0017] In one possible implementation, the communication connection between the first cluster function network element and the second cluster function network element is a heartbeat connection, so as to perform a primary / backup switch when the primary cluster function network element fails, and switch the backup cluster function network element to the new primary cluster function network element.

[0018] In one possible implementation, the first sub-device further includes a first cluster gateway belonging to the first cluster core network, and the second sub-device further includes a second cluster gateway belonging to the second cluster core network.

[0019] The first cluster gateway is used to send and receive user plane information between the base station and the main cluster functional network element.

[0020] The second cluster gateway is used to send and receive user plane information between the base station and the main cluster functional network element.

[0021] In one possible implementation, the first cluster function network element includes a first cluster control function network element and a first cluster media function network element, and the second cluster function network element includes a second cluster control function network element and a second cluster media function network element.

[0022] When the first cluster function is the main cluster function network element, the first cluster control function network element is used to receive and process control plane information sent by the second device, and the first cluster media function network element is used to receive and process user plane information sent by the second device.

[0023] When the second cluster function is the main cluster function network element, the second cluster control function network element is used to receive and process control plane information sent by the second device, and the second cluster media function network element is used to receive and process user plane information sent by the second device.

[0024] Secondly, embodiments of this application provide a communication method based on a remote disaster recovery network, applied to a second device. The communication method based on the remote disaster recovery network includes:

[0025] When communicating with the primary cluster function network element in the first and second cluster function network elements, the communication message received from the base station is sent to the primary cluster function network element in the first and second cluster function network elements through an internal interface. The user instructs the primary cluster function network element to process the communication message to realize the terminal's communication. The first and second cluster function network elements have a primary and backup mechanism.

[0026] If the primary / backup switching information is received from the internal interface between the trunking function network element and the second device, the original backup trunking function network element is identified as the new primary trunking function network element, and the communication messages received from the base station are sent to the new primary trunking function network element through the internal interface.

[0027] In one possible implementation, the second device includes a first sub-device or a second sub-device. The first sub-device includes a first evolved mobility management entity and a first trunking gateway belonging to a first trunking core network. The second sub-device includes a second evolved mobility management entity and a second trunking gateway belonging to a second trunking core network. The communication messages include control plane information and user plane information.

[0028] The step of sending the received communication messages from the base station to the main cluster function network element via the internal interface includes:

[0029] If the second device includes the first sub-device, then the first evolved mobility management entity is controlled to send the control plane information of the trunking terminal and data terminal received from the base station to the main trunking function network element through an internal interface, and the first trunking gateway is controlled to send the user plane information of the trunking terminal and data terminal received from the base station to the main trunking function network element through an internal interface.

[0030] If the second device includes the second sub-device, then the second evolved mobility management entity is controlled to send the control plane information of the trunking terminal and data terminal received from the base station to the main trunking function network element through an internal interface, and the second trunking gateway is controlled to send the user plane information of the trunking terminal and data terminal received from the base station to the main trunking function network element through an internal interface.

[0031] In one possible implementation, the second device includes a first sub-device and a second sub-device, which together form a POOL network.

[0032] The first sub-device includes a first evolved mobility management entity and a first cluster gateway belonging to the first cluster core network, and the second sub-device includes a second evolved mobility management entity and a second cluster gateway belonging to the second cluster core network.

[0033] The step of sending the received control plane information and user plane information from the base station to the main trunking function network element via the internal interface includes:

[0034] The first evolved mobility management entity is controlled to send the control plane information of the cluster terminal received from the base station to the main cluster function network element through an internal interface;

[0035] The first cluster gateway is controlled to send the user plane information of the cluster terminal received from the base station to the main cluster function network element through its internal interface.

[0036] The second evolved mobility management entity is controlled to send the control plane information of the data terminal received from the base station to the main cluster function network element through an internal interface.

[0037] The second cluster gateway is controlled to send the user plane information of the data terminal received from the base station to the main cluster function network element through the internal interface.

[0038] In one possible implementation, the received communication messages from the base station are sent to the new master cluster function network element via an internal interface, including:

[0039] The cluster terminal registers itself on the new main cluster function network element, and after successful registration, it sends the communication messages received from the base station to the new main cluster function network element through the internal interface.

[0040] In one possible implementation, the method further includes:

[0041] The load capacity of the first sub-device and the second sub-device is sent to the base station. The load capacity is used to enable access when the cluster terminal and / or data terminal accesses for the first time.

[0042] When a cluster terminal and / or data terminal accesses the network, the current primary cluster functional network element is determined based on the received primary / backup status information, and access is initiated by the current primary cluster functional network element.

[0043] Therefore, this application provides a communication system and method based on off-site disaster recovery networking. The communication system includes a first device, a second device, and a base station. The first device includes a first cluster function network element belonging to a first cluster core network and a second cluster function network element belonging to a second cluster core network. A primary / backup mechanism exists between the first and second cluster function network elements. The first and second cluster function network elements are communicatively connected. The base station is connected to the second device via an S1-T interface. The second device is connected to both the first and second cluster function network elements via internal interfaces. When the second device receives primary / backup switching information transmitted by the first and second cluster function network elements through their internal interfaces, it sends the received communication message from the base station to the new primary cluster function network element via its internal interface, enabling the cluster terminals and data terminals to communicate with the current primary cluster function network element. The technical solution provided in this application sets a primary / backup mechanism between the first and second cluster function network elements, rather than between the first and second cluster core networks. This eliminates the need for a primary / backup notification mechanism on the S1-T interface of the base station, reducing the requirements on the base station and effectively saving costs associated with upgrading existing single-cluster core networks. Since the second device connects to both the first and second cluster function network elements via internal interfaces, during a primary / backup switchover, the second device can send the communication messages received from the base station to the new primary cluster function network element through its internal interface. This effectively avoids terminal communication interruptions and improves the user experience. Attached Figure Description

[0044] Figure 1 A schematic diagram of a prior art off-site disaster recovery network provided for embodiments of this application;

[0045] Figure 2 A schematic diagram of a communication system architecture based on off-site disaster recovery networking provided for embodiments of this application;

[0046] Figure 3 A schematic diagram of another communication system architecture based on off-site disaster recovery networking provided for embodiments of this application;

[0047] Figure 4 A schematic diagram of communication data flow based on off-site disaster recovery networking provided for embodiments of this application;

[0048] Figure 5This is a flowchart illustrating a communication method based on a disaster recovery network provided in an embodiment of this application.

[0049] The accompanying drawings have illustrated specific embodiments of this disclosure, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this disclosure to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0050] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0051] In the embodiments of this application, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0052] The technical solution provided in this application can be applied to scenarios where base stations communicate with trunking core networks. To provide users with a better communication experience, a remote disaster recovery network can be defined in the B-TrunC header. The remote disaster recovery network includes two trunking core networks, with a 1+1 primary / backup configuration. That is, there is always one primary trunking core network and one backup trunking core network. Only when the primary trunking core network fails and communication is impossible will a primary / backup switch be performed, switching the backup trunking core network to the primary trunking core network to continue communicating with the base station, thus enabling terminal devices to conduct network services through the base station and trunking core network.

[0053] Figure 1 This is a schematic diagram of a prior art off-site disaster recovery network architecture provided for embodiments of this application. Figure 1This includes a trunking core network (TCN1), a trunking core network (TCN2), base stations, trunking terminals, and data terminals. TCN1 and TCN2 operate on a primary / backup mechanism, and can perform heartbeat detection via a private interface. The base station connects to both TCN1 and TCN2 via the S1-T interface, and both the trunking terminals and data terminals can communicate with the base station.

[0054] according to Figure 1 The architecture shown assumes Figure 1 In this system, the primary trunking core network is TCN1, and the backup trunking core network is TCN2. Before communication, the base station needs to register the trunking terminal or data terminal in TCN1 through the S1-T interface, such as user registration or group registration. Only after successful registration can the trunking terminal and data terminal be connected to TCN1, enabling them to communicate with TCN1 through the base station.

[0055] Understandably, during the operation of the cluster core network TCN1, the cluster core network TCN1 and the cluster core network TCN2 perform heartbeat detection. In other words, the cluster core network TCN2 can determine whether the cluster core network TCN1 has failed through heartbeat detection, so as to ensure normal communication of the terminal.

[0056] For example, when the trunking terminal and the data terminal communicate with the trunking core network TCN1 through the base station, if the trunking core network TCN1 fails, the trunking core network TCN2 determines that the trunking core network TCN1 has failed based on heartbeat detection. At this time, the trunking core networks TCN1 and TCN2 perform a primary / backup switch, switching the trunking core network TCN2 to the primary trunking core network and switching the trunking core network TCN1 to the backup trunking core network. That is, the trunking core network TCN2 is used to provide communication services for the trunking terminal and the data terminal.

[0057] Furthermore, during the primary / backup switch between the trunking core network TCN1 and the trunking core network TCN2, both TCN1 and TCN2 send primary / backup switch messages to the base station through the S1-T interface between themselves and the base station, notifying the base station one by one of the primary / backup status changes. Based on the received messages, the base station determines that the current primary trunking core network is the trunking core network TCN2 and routes the trunking terminal or data terminal to the trunking core network TCN2.

[0058] However, after the trunking core network performs a primary / backup switchover, both the trunking terminals and data terminals need to reconnect to the trunking core network TCN2. This reconnection takes time, causing service interruptions and significantly reducing user experience. Furthermore, during the primary / backup switchover, both the trunking core networks TCN1 and TCN2 send messages via the S1-T interface to notify each connected base station of the primary / backup status change. This can increase the signaling load on the S1-T interface during large-scale networking. When modifying a single-trunking core network based on existing disaster recovery networking architectures, both the base station and the trunking core network need to support cross-site disaster recovery networking. For example, a primary / backup notification mechanism needs to be introduced into the S1-T interface between the base station and the trunking core network, resulting in high modification costs.

[0059] To address the issues of service interruption during primary / backup failover in existing off-site disaster recovery networks, and the high requirements for base stations and core trunking networks, and considering that trunking terminals and data terminals need to register on the trunking core network when accessing it, the trunking function network elements of two trunking core networks can be integrated into a first device, with a primary / backup mechanism between the two network elements. The second device establishes communication connections with both network elements. This allows the second device to directly send terminal service messages to the new primary trunking core network's network elements when a network element fails in the primary trunking core network, ensuring uninterrupted terminal services during primary network element failures. This effectively improves user experience, places no additional requirements on base stations, and reduces upgrade costs.

[0060] The data processing method provided in this application will now be described in detail through specific embodiments. It is understood that these specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0061] Figure 2 This is a schematic diagram of a communication system architecture based on off-site disaster recovery networking, provided as an embodiment of this application. According to... Figure 2As shown, the communication system based on off-site disaster recovery networking includes a first device, a second device, and a base station T-eNB. The first device includes a first cluster function network element belonging to the first cluster core network and a second cluster function network element belonging to the second cluster core network. The first and second cluster function network elements operate on a primary / backup mechanism. The first and second cluster function network elements are connected communicatively. The base station T-eNB is connected to the second device via an S1-T interface. The second device is connected to both the first and second cluster function network elements via internal interfaces. When the second device receives primary / backup switching information transmitted through the internal interface, it sends the received communication messages from the base station to the new primary cluster function network element via the internal interface, enabling the cluster terminals and data terminals to communicate with the current primary cluster function network element.

[0062] For example, since the first cluster function network element and the second cluster function network element are in a primary-backup mechanism, the communication connection between the first cluster function network element and the second cluster function network element can be a heartbeat connection, so as to perform primary-backup switching when the primary cluster function network element fails, and switch the backup cluster function network element to the new primary cluster function network element.

[0063] It is understood that heartbeat detection can be performed between the first and second cluster function network elements to ensure that the standby cluster function network element can determine that the primary cluster function network element is not faulty based on the heartbeat information sent by the primary cluster function network element, and determine that the primary cluster function network element has failed when the standby cluster function network element does not receive the heartbeat information sent by the primary cluster function network element, thereby controlling the primary / standby switchover and switching the standby cluster function network element to the new cluster function network element. This application embodiment does not specifically limit the heartbeat detection between the two cluster function network elements.

[0064] In this embodiment of the application, a heartbeat connection is established between the first cluster function network element and the second cluster function network element, enabling heartbeat detection between the two cluster function network elements. This allows for timely switching between primary and backup when the primary cluster function network element fails, providing a better communication experience for the terminal.

[0065] For example, the communication messages sent by the base station may include control plane information and user plane information, or other information. This application embodiment does not specifically limit the communication messages. The internal interface connecting the second device with the first and second trunking function network elements can be configured according to actual conditions, and needs to be able to receive primary / backup switching information. This application embodiment does not specifically limit the internal interface.

[0066] Therefore, the communication system based on off-site disaster recovery networking provided in this application includes a first device, a second device, and a base station. The base station and the second device are connected via an S1-T interface. A primary / backup mechanism exists between the first and second cluster function network elements in the first device, and the second device is connected to both the first and second cluster function network elements via internal interfaces. Thus, when the primary cluster function network element in the first and second cluster function network elements fails, both elements transmit primary / backup switching information to the second device via their internal interfaces. This allows the second device to forward the communication messages received from the base station to the new primary cluster function network element via its internal interface. This ensures that the terminal can continue normal service communication even when a network element fails in the core network, effectively improving the user experience. Furthermore, the technical solution in this application does not require a primary / backup notification mechanism in the S1-T interface between the base station and the second device, reducing the requirements for the base station, saving network upgrade costs, and facilitating large-scale network improvements.

[0067] For example, the second device described above may include a first sub-device and / or a second sub-device. The first sub-device includes a first Evolved Mobility Management Entity (eMME) belonging to the first trunking core network, and the second sub-device includes a second Evolved Mobility Management Entity (eMME) belonging to the second trunking core network. The first eMME is used to transmit and receive control plane information between the base station and the main trunking functional network element. The second eMME is used to transmit and receive control plane information between the base station and the main trunking functional network element. The first and second sub-devices constitute a POOL network.

[0068] It is understood that the second device includes at least one evolved mobility management entity (eMME) from the trunking core network. The functions of the second device will be described below based on the number of eMMEs included.

[0069] In one possible implementation, the second device includes either a first sub-device or a second sub-device; that is, the second device includes either a first evolved mobility management entity (eMME) or a second evolved mobility management entity (eMME). The specific choice can be made according to actual circumstances, and this application embodiment does not impose any limitations on this. The evolved mobility management entity (eMME) included in the second device can be used to transmit and receive control plane information between the base station and the main trunking function network element. This control plane information includes the control plane information of the trunking terminal and the control plane information of the data terminal.

[0070] In another possible implementation, the second device includes a first sub-device and a second sub-device, specifically a first evolved mobility management entity (eMME) and a second eMME, which together form a pooled network. In this implementation, one eMME can transmit and receive control plane information between the base station and the main clustering function network element for the cluster terminals, while the other eMME can transmit and receive control plane information between the base station and the main clustering function network element for the data terminals, thus reducing the data transmission burden on the eMMEs. Whether the transmitted or received control plane information pertains to the cluster terminals or the data terminals can be configured according to actual conditions; this application does not impose any limitations on this.

[0071] In this embodiment, control plane information between the base station and the main trunking function network element is transmitted and received through at least one evolved mobility management entity (eMME). When the second device includes a first sub-device and a second sub-device (i.e., two eMMEs), the first and second sub-devices form a POOL network, capable of transmitting and receiving control plane information between the base station and the main trunking function network element.

[0072] For example, the first sub-device in this application may further include a first cluster gateway (x Gateway, abbreviated as xGW) belonging to the first cluster core network, and the second sub-device may further include a second cluster gateway belonging to the second cluster core network; the first cluster gateway is used to transmit and receive user plane information between the base station and the main cluster functional network element; the second cluster gateway is used to transmit and receive user plane information between the base station and the main cluster functional network element.

[0073] Understandably, the base station T-eNB connects to the eMME through the S1-T control plane and to the xGW through the S1-T user plane, which eliminates the need to introduce a primary / backup notification mechanism on the base station's S1-T interface, thus reducing the requirements for base station modifications.

[0074] For example, the second device may include at least one sub-device, that is, it may include at least one cluster core gateway. When the second device includes a cluster core gateway, the cluster core gateway can transmit and receive user plane information of cluster terminals and data terminals between the base station and the main cluster function network element. When the second device includes a first cluster gateway and a second cluster gateway, one of the two cluster gateways can transmit and receive user plane information of cluster terminals between the base station and the main cluster function network element, and the other can transmit and receive user plane information of data terminals between the base station and the main cluster function network element. The cluster gateway for transmitting and receiving user plane information of cluster terminals can be configured according to the actual situation of the first cluster gateway and the second cluster gateway, and this application embodiment does not impose any limitations on this.

[0075] In this embodiment of the application, user plane information between the base station and the main cluster functional network element can be sent and received through the cluster core gateway, ensuring that the terminal's service access is normal.

[0076] As described in the above embodiments, the communication message may include control plane information and user plane information. Therefore, the first trunking function network element in this application includes a first trunking control function network element (TCF) and a first trunking media function network element (TMF), and the second trunking function network element includes a second trunking control function network element and a second trunking media function network element. When the first trunking function is the main trunking function network element, the first trunking control function network element is used to receive and process the control plane information sent by the second device, and the first trunking media function network element is used to receive and process the user plane information sent by the second device. When the second trunking function is the main trunking function network element, the second trunking control function network element is used to receive and process the control plane information sent by the second device, and the second trunking media function network element is used to receive and process the user plane information sent by the second device.

[0077] It is understandable that a trunking function network element can include a trunking control function network element and a trunking media function network element. Since one of the first and second trunking function network elements is the primary trunking function network element and the other is the backup trunking function network element, the trunking control function network element in the primary trunking function network element is used to receive and process control plane information sent by the second device, and the trunking media function network element is used to receive and process user plane information sent by the second device.

[0078] In this embodiment, the control plane information is processed by the cluster control function network element, and the user plane information is processed by the cluster media function network element to ensure normal service communication of the terminal.

[0079] For example, the communication system based on off-site disaster recovery networking provided in this application embodiment may also include an evolved home subscriber server (eHSS). The eHSS may be integrated into the first device or set up separately. This application embodiment does not limit this in any way.

[0080] To facilitate connection to the communication system based on off-site disaster recovery networking provided in this application's embodiments, the architecture of the communication system based on off-site disaster recovery networking provided in this application will be described in detail below, based on all the components described in the above embodiments. Specifically, please refer to... Figure 3 As shown, Figure 3This is a schematic diagram of another communication system architecture based on off-site disaster recovery networking provided in an embodiment of this application.

[0081] according to Figure 3 As shown, the eMME / xGW (SGW / PGW) of the primary and backup cluster core networks are configured in a pooled network. The eHSS, TCF, and TMF are integrated together, and the eHSS / TCF / TMF of the first and second cluster core networks form a "1+1 primary / backup" network, with internal heartbeat detection enabling primary / backup detection and arbitration mechanisms. The eHSS / TCF / TMF of the first and second cluster core networks are connected to the eMME / xGW of the first and second cluster core networks respectively through internal interfaces, notifying them of their primary / backup status. For cluster user access, the eMME can select the eHSS / TCF / TMF of the primary cluster core network based on the primary / backup status received through the internal interface. Specifically, for group downlink services, the primary cluster core network TCF / TMF load-sharing selects the eMME / xGW for establishing the group control plane and user plane.

[0082] Since the T-eNB connects to the eMME via the S1-T control plane and to the xGW via the S1-T user plane, and the T-eNB directly connects to the POOL network, there is no need to introduce a primary / backup notification mechanism on the S1-T interface. The base station is not visible to the cluster core network row standard for off-site disaster recovery networking.

[0083] According to the above Figure 3 The structure shown in the diagram is illustrated in this application embodiment, which also provides a communication data flow diagram, as can be seen in the following example. Figure 4 As shown, Figure 4 This is a schematic diagram of communication data flow based on off-site disaster recovery networking, provided as an embodiment of this application.

[0084] exist Figure 4 In this configuration, the first cluster core network is the primary cluster core network, and the second cluster core network is the backup cluster core network. When cluster terminals and data terminals connect for the first time, the T-eNB selects the eMME within the POOL network based on the load balancing capacity issued by the cluster core network. Figure 4 In this context, for cluster terminals accessing the eMME in the first cluster core network and for data terminals accessing the eMME in the second cluster core network, the eMME selects the eHSS based on the primary / backup status of the internal interface messages, i.e., selects the eHSS in the first cluster core network, and obtains the subscribed data.

[0085] Furthermore, for cluster terminals, a primary TCF is selected for cluster registration. This ensures that when a cluster terminal subsequently performs cluster unicast services, the primary TCF selects the eMME / xGW to which the user is connected to establish a dedicated cluster unicast bearer. And when initiating a group call service to establish a group downlink multicast, the primary TCF load-sharing selects the eMME / xGW for establishing the group downlink forwarding plane.

[0086] exist Figure 4 For details regarding the data flow of the cluster terminal control plane, please refer to [link / reference]. Figure 4 The red dashed line emitted by the cluster terminal indicates the data flow of the data plane. (See also: [link to data flow diagram]). Figure 4 The solid red line emitted by the cluster terminal. For data flow related to the data terminal control plane, please refer to... Figure 4 The red dashed line emitted by the data terminal indicates the data flow on the data plane. Figure 4 The solid red line emitted by the data terminal. This application embodiment is only for illustrative purposes. Figure 4 The data stream shown is used as an example for illustration, but it does not mean that the embodiments of this application are limited to this.

[0087] according to Figure 4 As shown in the embodiments of this application, when an eMME / xGW network element in a POOL network fails, other network elements deployed in a unified manner detect the failure and perform resource consistency processing, releasing the resources of affected users / groups. When users subsequently reconnect, the T-eNB reselects the eMME for access processing. Furthermore, the TCF / TMF does not need to perform primary / backup switching when detecting an eMME / xGW network element failure. In addition, when the TCF / TMF / eHSS in a 1+1 primary / backup network fails, the unified primary / backup arbitration processing unit detects the failure and performs primary / backup switching processing, sending a primary / backup status change notification to the eMME / xGW. The eMME / xGW releases the bearer resources of affected cluster users or groups, and the eMME proactively and smoothly performs the cluster re-registration process with the TCF that has been promoted from backup to primary. Moreover, the data terminal's services are not affected during this process, effectively improving the user experience.

[0088] Figure 5 This is a flowchart illustrating a communication method based on a remote disaster recovery network, provided in an embodiment of this application. This communication method based on a remote disaster recovery network can be executed by software and / or hardware devices; for example, the hardware device can be the second device described in the above embodiments. For example, please refer to... Figure 5 As shown, the communication method based on off-site disaster recovery networking may include:

[0089] S501. When communicating with the primary cluster function network element in the first and second cluster function network elements, the communication message received from the base station is sent to the primary cluster function network element in the first and second cluster function network elements through the internal interface. The user instructs the primary cluster function network element to process the communication message in order to realize the communication of the terminal. The first and second cluster function network elements have a primary and backup mechanism.

[0090] For example, when a cluster terminal and / or data terminal accesses the network, the current primary cluster function network element can be determined based on the received primary / standby status information, and the terminal can then access the primary cluster function network element. Specifically, based on the heartbeat detection between the first and second cluster function network elements, primary / standby status information can be sent to the second device, enabling the second device to accurately and quickly determine the primary cluster function network element and connect the cluster terminal and / or data terminal to it.

[0091] As can be seen from the communication system based on off-site disaster recovery networking described in the above embodiments, the second device in this application may include a first sub-device or a second sub-device, and the communication messages include control plane information and user plane information. The first sub-device may include a first evolved mobility management entity and a first cluster gateway belonging to the first cluster core network, and the second sub-device may include a second evolved mobility management entity and a second cluster gateway belonging to the second cluster core network.

[0092] For example, when sending communication messages received from a base station to the primary trunking function network element in the first and second trunking function network elements via an internal interface, if the second device includes a first sub-device, then the first evolved MIMO entity is controlled to send the control plane information of the trunking terminals and data terminals received from the base station to the primary trunking function network element via the internal interface, and the first trunking gateway is controlled to send the user plane information of the trunking terminals and data terminals received from the base station to the primary trunking function network element via the internal interface. If the second device includes a second sub-device, then the second evolved MIMO entity is controlled to send the control plane information of the trunking terminals and data terminals received from the base station to the primary trunking function network element via the internal interface, and the second trunking gateway is controlled to send the user plane information of the trunking terminals and data terminals received from the base station to the primary trunking function network element via the internal interface.

[0093] It is understood that when the second device includes a sub-device, the control plane information and user plane information of the cluster terminal and the data terminal are both sent and received through the sub-device. This application embodiment does not limit the specific sub-device included in the second device.

[0094] In this embodiment, the control evolved mobility management entity sends the control plane information of the trunking terminal and data terminal received from the base station to the main trunking function network element through an internal interface, and the control trunking gateway sends the user plane information of the trunking terminal and data terminal received from the base station to the main trunking function network element through an internal interface, which can ensure normal communication between the trunking terminal and the data terminal.

[0095] In another possible implementation, the second device may further include a first sub-device and a second sub-device, and the first and second sub-devices constitute a POOL network. The first sub-device includes a first evolved mobility management entity and a first trunking gateway belonging to the first trunking core network, and the second sub-device includes a second evolved mobility management entity and a second trunking gateway belonging to the second trunking core network.

[0096] In this possible implementation, when sending the received control plane information and user plane information from the base station to the main trunking function network element via the internal interface, the first evolved mobility management entity can be controlled to send the received control plane information of the trunking terminal from the base station to the main trunking function network element via the internal interface; the first trunking gateway can be controlled to send the received user plane information of the trunking terminal from the base station to the main trunking function network element via the internal interface; the second evolved mobility management entity can be controlled to send the received control plane information of the data terminal from the base station to the main trunking function network element via the internal interface; and the second trunking gateway can be controlled to send the received user plane information of the data terminal from the base station to the main trunking function network element via the internal interface.

[0097] This application embodiment only uses the example of a first sub-device corresponding to a trunking terminal and a second sub-device corresponding to a data terminal for illustration, but it does not mean that this application embodiment is limited to this. That is to say, when the second device includes the first sub-device and the second sub-device, it can also control the first evolved mobility management entity to send the control plane information of the data terminal received from the base station to the main trunking function network element through an internal interface; control the first trunking gateway to send the user plane information of the data terminal received from the base station to the main trunking function network element through an internal interface. Similarly, it can control the second evolved mobility management entity to send the control plane information of the trunking terminal received from the base station to the main trunking function network element through an internal interface; and control the second trunking gateway to send the user plane information of the trunking terminal received from the base station to the main trunking function network element through an internal interface.

[0098] For example, the first and second sub-devices need to send their load capacities to the base station so that when the trunking terminal and / or data terminal first access the trunking core network, they can access the network based on the load capacities of the first and second sub-devices, which can effectively improve the communication efficiency of the terminal.

[0099] In this embodiment, the Evolved Mobility Management Entity and the Cluster Gateway in the two sub-devices transmit the control plane information and user plane information of the data terminal sent by the base station, as well as the control plane information and user plane information of the cluster terminal, through their internal interfaces. This effectively reduces the data transmission pressure of the control plane information and user plane information of the cluster terminal and the data terminal through a single sub-device, and effectively improves communication efficiency.

[0100] S502. If the master / backup switching information is received from the internal interface between the trunking function network element and the second device, the original backup trunking function network element is determined as the new master trunking function network element, and the communication message received from the base station is sent to the new master trunking function network element through the internal interface.

[0101] For example, when the primary cluster function element fails, upon accessing the cluster terminal and / or data terminal, the current primary cluster function element can be determined based on the received primary / standby status information, and access can be established to that primary cluster function element. Specifically, through heartbeat detection between the two cluster function elements, both the first and second cluster function elements transmit primary / standby switching information through their internal interfaces with the second device. This allows the second device to determine the new primary cluster function element based on the received primary / standby switching information, effectively designating the original standby cluster function element as the new primary cluster function element.

[0102] Furthermore, once a new primary trunking function network element is identified, the trunking terminal can register on the new primary trunking function network element. After successful registration, the terminal can send the communication messages received from the base station to the new primary trunking function network element through the internal interface.

[0103] For example, the cluster terminal can be registered on the new main cluster function network element through the evolved mobility management entity in the second device. This application embodiment does not limit the specific registration process.

[0104] In this embodiment of the application, if a network element failure occurs in the communication system based on the disaster recovery network, only the second device needs to register the cluster terminal, but not the data terminal. This can effectively ensure the communication of the data terminal and reduce the registration time of the cluster terminal.

[0105] In this embodiment, the method of sending the received communication message sent by the base station to the new main cluster function network element through the internal interface can refer to the method of sending the received communication message sent by the base station to the main cluster function network element through the internal interface described in the above embodiment, and will not be repeated here.

[0106] Therefore, the communication method based on off-site disaster recovery networking provided in this application embodiment, applied to the second device in the aforementioned communication system based on off-site fire-resistant networking, when communicating with the primary cluster function network element in the first and second access cluster function network elements, sends the communication messages received from the base station to the primary cluster function network element in the first and second cluster function network elements through an internal interface. The communication message user instructs the primary cluster function network element to process the communication message to realize terminal communication. If the primary / backup switching information transmitted between the cluster function network element and the second device is received, the original backup cluster function network element is determined as the new primary cluster function network element, and the communication messages received from the base station are sent to the new primary cluster function network element through the internal interface. The communication method based on off-site disaster recovery networking provided in this application embodiment, through the internal interface between the second device and the two cluster function network elements, promptly sends the communication messages received from the base station to the new primary cluster function network element when the primary cluster function network element fails, avoiding the problem of terminal communication interruption and effectively improving user experience. Furthermore, by setting the primary and secondary cluster function network elements as a primary and secondary mechanism, the base station does not need to introduce a primary and secondary notification mechanism on the S1-T interface, which reduces the requirements for the base station and can effectively reduce equipment costs.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A communication system based on off-site disaster recovery networking, characterized by, The application relates to a communication system based on off-site disaster recovery networking. The first device, the second device and the base station, the first device comprising a first cluster function network element belonging to a first cluster core network and a second cluster function network element belonging to a second cluster core network, the first cluster function network element and the second cluster function network element being in a master-slave mechanism; The first cluster function network element and the second cluster function network element are connected in communication; The base station is connected with the second device through an S1-T interface; The second device is connected with the first cluster function network element and the second cluster function network element through internal interfaces; The second device is used for transmitting a communication message received from the base station to a new master cluster function network element through the internal interface when master-slave switching information transmitted by the first cluster function network element and the second cluster function network element through the internal interface is received, so that a cluster terminal and a data terminal communicate with the current master cluster function network element.

2. The communication system based on offsite disaster tolerance networking according to claim 1, wherein, The second device comprises a first sub-device and / or a second sub-device; The first sub-device comprises a first evolved mobile management entity belonging to the first cluster core network, and the second sub-device comprises a second evolved mobile management entity belonging to the second cluster core network; The first evolved mobile management entity is used for transmitting control plane information between the base station and the master cluster function network element; The second evolved mobile management entity is used for transmitting control plane information between the base station and the master cluster function network element; The first sub-device and the second sub-device constitute a POOL networking.

3. The communication system based on offsite disaster tolerance networking according to claim 1, wherein, The communication connection between the first cluster function network element and the second cluster function network element is a heartbeat connection, so that master-slave switching is performed when the master cluster function network element fails, and the standby cluster function network element is switched to a new master cluster function network element.

4. The communication system based on off-site disaster recovery networking according to claim 2, wherein The first sub-device further comprises a first cluster gateway belonging to the first cluster core network, and the second sub-device further comprises a second cluster gateway belonging to the second cluster core network; The first cluster gateway is used for transmitting user plane information between the base station and the master cluster function network element; The second cluster gateway is used for transmitting user plane information between the base station and the master cluster function network element.

5. The communication system based on offsite disaster tolerance networking according to any one of claims 1-4, characterized in that, The first cluster function network element comprises a first cluster control function network element and a first cluster media function network element, and the second cluster function network element comprises a second cluster control function network element and a second cluster media function network element; When the first cluster function is the master cluster function network element, the first cluster control function network element is used for receiving and processing control plane information transmitted by the second device, and the first cluster media function network element is used for receiving and processing user plane information transmitted by the second device; When the second cluster function is the master cluster function network element, the second cluster control function network element is used for receiving and processing control plane information transmitted by the second device, and the second cluster media function network element is used for receiving and processing user plane information transmitted by the second device.

6. A communication method based on off-site disaster recovery networking, characterized in that, The application is applied to the second device and comprises: In the communication with the first cluster function network element and the primary cluster function network element in the second cluster function network element, the communication message sent by the base station is sent to the primary cluster function network element in the first cluster function network element and the second cluster function network element through the internal interface, and the communication message is used to instruct the primary cluster function network element to process the communication message to realize the communication of the terminal, and the first cluster function network element and the second cluster function network element are in a primary-backup mechanism; If the primary-backup switching information transmitted by the internal interface between the cluster function network element and the second device is received, the original backup cluster function network element is determined as a new primary cluster function network element, and the communication message sent by the base station is sent to the new primary cluster function network element through the internal interface.

7. The method of claim 6, wherein, The second device includes a first sub-device or a second sub-device, the first sub-device includes a first evolved mobile management entity and a first cluster gateway belonging to a first cluster core network, and the second sub-device includes a second evolved mobile management entity and a second cluster gateway belonging to a second cluster core network, and the communication message includes control plane information and user plane information; The communication message sent by the base station is sent to the primary cluster function network element through the internal interface, including: If the second device includes the first sub-device, the first evolved mobile management entity is controlled to send the control plane information of the cluster terminal and the data terminal sent by the base station to the primary cluster function network element through the internal interface, and the first cluster gateway is controlled to send the user plane information of the cluster terminal and the data terminal sent by the base station to the primary cluster function network element through the internal interface; If the second device includes the second sub-device, the second evolved mobile management entity is controlled to send the control plane information of the cluster terminal and the data terminal sent by the base station to the primary cluster function network element through the internal interface, and the second cluster gateway is controlled to send the user plane information of the cluster terminal and the data terminal sent by the base station to the primary cluster function network element through the internal interface.

8. The method of claim 6, wherein, The second device includes a first sub-device and a second sub-device, and the first sub-device and the second sub-device constitute a POOL network group; The first sub-device includes a first evolved mobile management entity and a first cluster gateway belonging to a first cluster core network, and the second sub-device includes a second evolved mobile management entity and a second cluster gateway belonging to a second cluster core network; The control plane information and the user plane information sent by the base station are sent to the primary cluster function network element through the internal interface, including: The first evolved mobile management entity is controlled to send the control plane information of the cluster terminal sent by the base station to the primary cluster function network element through the internal interface; The first cluster gateway is controlled to send the user plane information of the cluster terminal sent by the base station to the primary cluster function network element through the internal interface; The second evolved mobile management entity is controlled to send the control plane information of the data terminal sent by the base station to the primary cluster function network element through the internal interface; The second cluster gateway is controlled to send the received user plane information of the data terminal sent by the base station to the master cluster function network element through an internal interface.

9. The method of claim 6, wherein, The received communication message sent by the base station is sent to the new master cluster function network element through an internal interface, including: The cluster terminal is registered on the new master cluster function network element, and after the registration is successful, the received communication message sent by the base station is sent to the new master cluster function network element through an internal interface.

10. The method of claim 8, wherein, The method further includes: The load capacity of the first sub-device and the second sub-device is issued to the base station, and the load capacity is used to access according to the load capacity when the cluster terminal and / or the data terminal access for the first time; When the cluster terminal and / or the data terminal access, the current master cluster function network element is determined according to the received master-backup state information, and the current master cluster function network element is accessed.

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