CN112867016B - Core network equipment for broadband trunking communication and deployment method and device thereof - Google Patents

Core network equipment for broadband trunking communication and deployment method and device thereof Download PDF

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CN112867016B
CN112867016B CN201911171234.1A CN201911171234A CN112867016B CN 112867016 B CN112867016 B CN 112867016B CN 201911171234 A CN201911171234 A CN 201911171234A CN 112867016 B CN112867016 B CN 112867016B
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cluster
sgw
pgw
capability
gateway
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CN112867016A (en
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施荣荣
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Chengdu TD Tech Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1403—Architecture for metering, charging or billing
    • H04L12/1407—Policy-and-charging control [PCC] architecture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/24—Accounting or billing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/08—Trunked mobile radio systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

The embodiment of the invention provides core network equipment for broadband trunking communication and a deployment method and device thereof. The core network device includes: a cluster enhanced centralized gateway comprising a PDN gateway control plane portion (PGW-C) and a serving gateway control plane portion (SGW-C); a cluster-enhanced distributed gateway comprising a PDN gateway user plane portion (PGW-U), a serving gateway user plane portion (SGW-U), and a cluster media function (TMF); the deployment mode of the cluster enhanced centralized gateway is central deployment, and the deployment mode of the cluster enhanced distributed gateway is distributed deployment. The embodiment of the invention realizes the separation of the control plane and the user plane (CU), reduces the butt joint of the signaling plane, saves transmission resources and improves service experience.

Description

Core network equipment for broadband trunking communication and deployment method and device thereof
Technical Field
The invention belongs to the technical field of broadband trunking communication (Broadband Trunking Communication, B-trunk C), and particularly relates to core network equipment of broadband trunking communication and a deployment method and device thereof.
Background
B-TruC is a special network broadband trunking system standard based on TD-LTE (time division-long term evolution) digital transmission and trunking voice communication formulated by broadband trunking industry alliance organization. The B-trunk Release1 technical standard is completed and released successively, and becomes the first LTE broadband trunking standard supporting point-to-multipoint voice and multimedia trunking scheduling public security and disaster reduction applications of ITU recommendations. The B-trunk C Release1 enhances the functions of the voice cluster basic service, the supplementary service, the multimedia cluster scheduling and other broadband cluster services on the basis of ensuring compatibility with LTE data service, has the characteristics of flexible bandwidth, high frequency spectrum efficiency, low time delay and high reliability, and can meet the requirements of professional users on voice clusters, broadband data, emergency command scheduling and the like.
Broadband cluster (B-trunk) systems support both home network architecture and roaming architecture. The local network architecture includes a support single core network architecture and a multi-core network architecture.
However, when the single-core network architecture is adopted to perform the networking of the province/local city large network, the access path is relatively long, so that the technical problem of large time delay of the user plane and large occupied central transmission bandwidth is caused. When the multi-core network architecture is adopted to carry out multi-place city networking distributed networking, the technical problems of complex interface of signaling surfaces between core networks, large occupied central transmission bandwidth and large time delay of signaling surfaces and user surfaces exist.
Disclosure of Invention
The embodiment of the invention provides a deployment method, a deployment device and deployment equipment of core network equipment of broadband trunking communication.
The technical scheme of the embodiment of the invention is as follows:
a core network device for broadband trunking communication, comprising:
a cluster enhanced centralized gateway comprising a PDN gateway control plane portion (PGW-C) and a serving gateway control plane portion (SGW-C);
a cluster-enhanced distributed gateway comprising a PDN gateway user plane portion (PGW-U), a serving gateway user plane portion (SGW-U), and a cluster media function (TMF);
the deployment mode of the cluster enhanced centralized gateway is central deployment, and the deployment mode of the cluster enhanced distributed gateway is distributed deployment.
In one embodiment, the cluster-enhanced centralized gateway further comprises a cluster control function (TCF), the SGW-C and the SGW-U are connected via a Sxa interface, the PGW-C and the PGW-U are connected via a Sxb interface, and the TCF and the TMF are connected via an interface set based on a packet forwarding control protocol PFCP.
In one embodiment, the PGW-C comprises at least one of the following:
means for PGW-U selection; means for S5/S8 tunnel IP and user plane tunnel terminal identification (TEIDU) allocation; means for user address allocation; PGW external signaling centralization interface; means for Gx or Gy or Ga or remote authentication dial-in user service Radius session control; means for policy control and charging PCC and bearer binding; means for GTPC path management; means for lawful interception of X1/X2/X3-C; means for cluster bearer establishment, modification and deletion.
In one embodiment, the PGW-U comprises at least one of the following:
means for cluster data routing and forwarding; means for billing data collection; the device is used for three-layer and four-layer/seven-layer message analysis and service control; means for GTPU path management; means for lawfully listening for X3-U.
In one embodiment, the SGW-C includes at least one of:
means for SGW-U selection; means for S1-U and S5/S8-U tunnel IP and TEIDU allocation; means for access and mobility session control; means for roaming the billing ticket; means for forwarding a downstream data notification message; means for GTPC path management; means for lawful interception of X1/X2/X3-C.
In one embodiment, the SGW-U includes at least one of:
means for SGW forwarding control; means for roaming billing data collection; a device for buffering downlink data in Idle state; means for GTPU path management; means for lawfully listening for X3-U; apparatus for replication and distribution of cluster traffic data.
A deployment method of core network equipment for broadband trunking communication comprises the following steps:
splitting a service gateway SGW into SGW-C and SGW-U; splitting a PDN gateway PGW into a PGW-C and a PGW-U;
integrating the PGW-C and the SGW-C into a cluster-enhanced centralized gateway, and integrating the PGW-U, SGW-U and the TMF into a cluster-enhanced distributed gateway;
and the cluster enhanced centralized gateway is deployed in the center, and the cluster enhanced distributed gateway is deployed in a distributed manner.
In one embodiment, the method further comprises:
integrating the TCF into a cluster enhanced centralized gateway;
the SGW-C and the SGW-U are connected through a Sxa interface, the PGW-C and the PGW-U are connected through a Sxb interface, and the TCF and the TMF are connected through an interface set based on a message forwarding control protocol PFCP.
In one embodiment, the splitting the PGW into PGW-C and PGW-U comprises:
splitting PGW-U selecting capability, 2.S5/S8 tunnel IP and user plane tunnel terminal identification TEIDU distributing capability, user address distributing capability, PGW external signaling centralization interface capability, gx or Gy or Ga or remote authentication dial-in user service Radius session control capability, PCC strategy control and bearing binding capability, GTPC path management capability, legal monitoring X1/X2/X3-C capability, cluster bearing establishment, modification and deletion capability into PGW-C; and splitting the cluster data routing and forwarding capability, the charging data collection capability, the three-four layer/seven layer message analysis and service control capability, the GTPU path management capability and the legal monitoring X3-U capability of the PGW into PGW-U.
In one embodiment, the splitting the SGW into SGW-C and SGW-U includes; splitting SGW-U selection capability, S1-U and S5/S8-U tunnel IP and TEIDU allocation capability, access and mobility session control capability, roaming billing ticket capability, downstream data notification message forwarding capability, GTPC path management capability, legal interception X1/X2/X3-C capability of the SGW into SGW-C; and splitting the SGW forwarding control capability, roaming charging data collection capability, idle state downlink data caching capability, GTPU path management capability, legal monitoring X3-U capability and cluster service data copying and distributing capability of the SGW into SGW-U.
A deployment device of core network equipment of broadband cluster communication comprises a processor and a memory;
the memory stores therein an application executable by the processor for causing the processor to perform the deployment method of the core network device for broadband trunking communication as set forth in any one of the above.
A computer readable storage medium having stored therein computer readable instructions for performing the method of deployment of core network devices for broadband trunked communication according to any one of the preceding claims.
As can be seen from the above technical solution, in the embodiment of the present invention, a core network device includes: a cluster-enhanced centralized gateway comprising PGW-C and SGW-C; a cluster-enhanced distributed gateway comprising PGW-U, SGW-U and TMF; the deployment mode of the cluster enhanced centralized gateway is central deployment, and the deployment mode of the cluster enhanced distributed gateway is distributed deployment. Therefore, the embodiment of the invention realizes CU separation, reduces signaling surface butt joint, saves transmission resources and improves service experience.
Drawings
Fig. 1 is a schematic diagram of a deployment of a home network architecture as a single core network in the prior art.
Fig. 2 is a schematic diagram of a deployment of a local network architecture as a multi-core network in the prior art.
Fig. 3 is a schematic diagram of core network deployment under a roaming architecture in the prior art.
Fig. 4 is a schematic diagram of a cluster core gateway CU split interface variation according to the present invention.
Fig. 5 is a schematic diagram of a protocol stack of an interface Sxw according to the present invention.
Fig. 6 is a logic function diagram after separation of the trunking core network gateway CU according to the invention.
Fig. 7 is a schematic diagram of a cluster core CU split architecture at single core deployment according to the present invention.
Fig. 8 is a schematic diagram of a cluster core CU separation architecture at the time of multi-core deployment according to the present invention.
Fig. 9 is a flowchart of a deployment method of core network devices for broadband trunking communication according to the present invention.
Fig. 10 is a block diagram of a deployment apparatus of a core network device for broadband trunking communication with a memory-processor architecture according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.
For simplicity and clarity of description, the following description sets forth aspects of the invention by describing several exemplary embodiments. Numerous details in the embodiments are provided solely to aid in the understanding of the invention. It will be apparent, however, that the embodiments of the invention may be practiced without limitation to these specific details. Some embodiments are not described in detail in order to avoid unnecessarily obscuring aspects of the present invention, but rather only to present a framework. Hereinafter, "comprising" means "including but not limited to", "according to … …" means "according to at least … …, but not limited to only … …". The term "a" or "an" is used herein to refer to a number of components, either one or more, or at least one, unless otherwise specified.
Applicants studied the current B-trunk standard and found that: in the system architecture defined by the current B-trunk standard, the limitation exists when the private network of the cluster is formed in the coverage province/local city, and the requirement of architecture optimization is thoroughly solved.
The following detailed analytical study procedure:
the B-trunk system supports a home network architecture and a roaming architecture. The local network architecture includes a support single core network architecture and a multi-core network architecture.
Under a single core network architecture, the system comprises: a single broadband Trunked Core Network (TCN), an LTE broadband trunked terminal, an LTE data terminal, an LTE broadband trunked base station (T-eNB), an LTE base station (eNB), a scheduling station (DC), and a traffic management station, etc.
Fig. 1 is a schematic diagram of a deployment of a home network architecture as a single core network in the prior art.
In fig. 1, a trunking terminal accesses a trunking base station T-eNB through a trunking Uu-T air interface to implement broadband data and trunking services. The LTE data terminal accesses the cluster base station T-eNB through the cluster Uu-T air interface or accesses the LTE base station eNB through the LTE Uu air interface to realize broadband data service. The cluster base station T-eNB is connected with the cluster core network through an S1-T interface, and the eNB is connected with the cluster core network through an S1 interface. DC is connected with TCF/TMF through D interface to realize broadband cluster dispatching service. The service management platform is connected with the cluster core network through an internal interface to carry out configuration and management of services.
In the large network networking scenario of province/city, the architecture determines that the anchor point of the cluster data service is in TMF, and the cluster core network generally needs to cover a larger area, so that the deployment position is higher, and the deployment is beneficial to the maintenance and networking cost of private network clients. Meanwhile, the high deployment position of TMF also results in longer access path of UE service, large time delay and poor corresponding service experience, and the private network itself requires high bandwidth (video service) and low time delay, thus providing new challenges for the network architecture of the cluster core network.
Fig. 2 is a schematic diagram of a deployment of a local network architecture as a multi-core network in the prior art.
For a local networking multi-core network architecture, the system comprises: the system comprises a plurality of broadband trunking core networks sharing the eHSS, an LTE broadband trunking terminal, an LTE data terminal, an LTE broadband trunking base station T-eNB, an LTE base station eNB, a dispatching desk DC and a service management desk. And the eMME is connected with the HSS through an S6a interface to transmit the subscription information of the IP packet data user and the service, and the TCF is connected with the THSS through a Tc1 interface to transmit the subscription information of the trunking user and the service.
Fig. 3 is a schematic diagram of core network deployment under a roaming architecture in the prior art.
B-trunk system roaming under roaming architecture takes home control as shown in fig. 3. The system supports a unified eHSS architecture and a distributed eHSS architecture. For a unified HSS networking scenario, the HSS for roaming and home are the same logical entity. For the distributed HSS networking scenario, the HSS in the roaming place and the HSS in the Home place are different logical entities, and the roaming terminal adopts a Home route mode. Using a multi-core network architecture under a multi-city networking scene, aiming at the establishment of a cross-core network roaming user cluster service: signaling plane routing: UE- > eNB- > vMME- > vTCF- > HTCF- > HPGW- > vSGW- > vMME- > eNB- > UE; user plane routing: UE- > eNB- > vSGW- > HPGW- > HTMF. Therefore, the technical problems of complex interface of signaling surfaces between core networks, long transmission distance, large delay of signaling/user surfaces, poor user experience and the like exist in the networking scene.
In summary, the applicant found that: under the existing B-trunk C cluster private network architecture, under the large network networking scene such as the cluster private network networking of the covered province/local city, if the single-core network architecture is adopted for the large network networking of the province/local city, the time delay of a user plane is large, the occupied central transmission bandwidth is large and the cluster service experience is poor due to longer access path, and if the multi-core network architecture is adopted for the multi-local city networking distributed networking, the defects of complex interface of signaling planes between core networks, large occupied central transmission bandwidth, large time delay of signaling/user plane and poor cluster service experience exist. The applicant studied the possible causes of the technical problems mentioned above and found that: the single-core network architecture is adopted to carry out the networking of the province/ground city large network, the deployment position of the anchor point of the user plane is higher, and the transmission distance is long; adopting a multi-core network architecture to carry out multi-place city networking distributed networking, wherein a plurality of inter-network butt joint interfaces of the core network lead to a plurality of signaling plane interactions and complex processing; the trunked user signaling plane and user plane anchor are home HTCF/HTMF, resulting in the signaling/user plane data to detour to the home core network. However, the system architecture defined by the B-trunk standard inevitably has the above limitation to cover the private network networking of the clusters in the province/city, so that the need of architecture optimization is thoroughly solved.
In the embodiment of the invention, aiming at one or more of the technical problems of large transmission delay, large occupied central transmission bandwidth, poor cluster service experience and the like when the cluster private network networking is carried out in the covered province/local city under the existing B-trunk cluster private network architecture, the control plane and the user plane (CU) are separated from the existing B-trunk cluster core network architecture, so that the signaling plane butt joint can be reduced, the transmission resources can be saved and the service experience can be improved.
In the embodiment of the invention, the separation of the control plane and the user plane of the cluster core network gateway is realized.
Specifically: splitting a Serving Gateway (SGW) into a Serving Gateway control plane portion (Serving Gateway Control Plane, SGW-C) and a Serving Gateway user plane portion (Serving Gateway User Plane, SGW-U), and splitting a PDN Gateway (PDN Gateway, PGW) into a PDN Gateway control plane portion (PDN Gateway Control Plane, PGW-C) and a PDN Gateway user plane portion (PDN Gateway User Plane, PGW-U), with reference to CU splitting defined in the 3GPP standard; while still supporting the SGW/PGW unification scenario, and the cluster control function (Trunking Control Function, TCF) and the cluster media function (Trunking Media Function, TMF) support separate deployments. Furthermore, the Sxa interface between SGW-C and SGW-U, sxb interface between PGW-C and PGW-U refer to the logical interfaces Sxa interface and Sxb interface already defined by the 3GPP standard, and a newly added logical interface, such as may be named Sxw interface, is provided between TCF and TMF.
Fig. 4 is a schematic diagram of a cluster core gateway CU split interface variation according to the present invention. Fig. 5 is a schematic diagram of a protocol stack of an interface Sxw according to the present invention. The protocol stack of the Sxw interface logical interface is based on the packet forwarding control protocol (Packet Forwarding Control Protocol, PFCP) protocol defined by the 3GPP standard.
It can be seen that the embodiment of the present invention provides a core network device for broadband trunking communication, including:
a cluster-enhanced centralized gateway comprising PGW-C and SGW-C;
a cluster-enhanced distributed gateway comprising PGW-U, SGW-U and TMF;
the deployment mode of the cluster enhanced centralized gateway is central deployment, and the deployment mode of the cluster enhanced distributed gateway is distributed deployment.
For example, a plurality of cluster-enhanced distributed gateways are distributed and deployed in a plurality of municipalities within a province, and a cluster-enhanced centralized gateway center is deployed in a unified superior deployment location, such as the province, of the plurality of municipalities in which the plurality of cluster-enhanced distributed gateways are deployed.
For another example, a plurality of cluster-enhanced distributed gateways are distributed and deployed in respective areas of a city, and a cluster-enhanced centralized gateway center is deployed in a unified superior deployment location, such as the city, of the respective areas in which the plurality of cluster-enhanced distributed gateways are deployed.
For another example, a plurality of cluster enhancement distributed gateways are distributed and deployed in each province in China, and a cluster enhancement centralized gateway center is deployed in a unified upper level, such as the country, of each province in which the plurality of cluster enhancement distributed gateways are deployed.
The separate logical entity functions are further described below. Fig. 6 is a logic function diagram after separation of the trunking core network gateway CU according to the invention.
Table 1 is an exemplary schematic diagram of the logical entity functions.
Figure BDA0002288776340000081
Figure BDA0002288776340000091
Figure BDA0002288776340000101
TABLE 1
In table 1, typical examples of logical entity functions are exemplarily described, and those skilled in the art can suggest that this description is merely exemplary and not intended to limit the scope of the embodiments of the present invention in fig. 7.
In one embodiment, the cluster-enhanced centralized gateway further comprises a TCF, the SGW-C and the SGW-U are connected via a Sxa interface, the PGW-C and the PGW-U are connected via a Sxb interface, and the TCF and the TMF are connected via an interface set based on a packet forwarding control protocol PFCP.
In one embodiment, the PGW-C comprises at least one of the following: means for PGW-U selection; means for S5/S8 tunnel IP and TEIDU allocation; means for user address allocation; PGW external signaling centralization interface; means for Gx or Gy or Ga or remote authentication dial-in user service Radius session control; means for PCC policy control and bearer binding; means for GTPC path management; means for lawful interception of X1/X2/X3-C; means for cluster bearer establishment, modification and deletion, etc.
In one embodiment, the PGW-U comprises at least one of the following: means for cluster data routing and forwarding; means for billing data collection; the device is used for three-layer and four-layer/seven-layer message analysis and service control; means for GTPU path management; means for lawfully listening for X3-U, etc.
In one embodiment, the SGW-C includes at least one of: means for SGW-U selection; means for S1-U and S5/S8-U tunnel IP and TEIDU allocation; means for access and mobility session control; means for roaming the billing ticket; means for forwarding a downstream data notification message; means for GTPC path management; means for lawful interception of X1/X2/X3-C, etc.
In one embodiment, the SGW-U includes at least one of: means for SGW forwarding control; means for roaming billing data collection; a device for buffering downlink data in Idle state; means for GTPU path management; means for lawfully listening for X3-U; means for replication and distribution of cluster traffic data, etc.
Typical applications of embodiments of the present invention are described below.
Fig. 7 is a schematic diagram of a cluster core CU split architecture at single core deployment according to the present invention. Wherein, the abbreviation includes: an LTE mobility management entity (Evolved Mobility Management Entity, mme); an Evolved Node B (eNB); an evolved packet core network (Evolved Packet Core Network, EPC); a User Equipment (UE); a home subscriber server (Home Subscriber Server, HSS); access point name (Access Point Name, APN); control plane and user plane separation (Control and User Plane Separation, cup); a centralized gateway (Centralized Gateway, CGW); distributed gateways (Distributed Gateway, DGW).
In fig. 7, the control plane and the user plane of the gateway are separated: splitting the gateway logic network element of the cluster core network, namely splitting the SGW into SGW-C and SGW-U, PGW into PGW-C and PGW-U. Moreover, a standard interface is newly defined between the TCF and the TMF to support TMF separation deployment; while still supporting the SGW/PGW/TMF unification scenario. At this time, the cluster gateway splits into:
(1) A cluster-enhanced centralized gateway (xCGW), the xCGW including SGW-C and PGW-C;
(2) Cluster enhanced distributed gateway (xDGW), which includes SGW-U, PGW-U and TMF.
Furthermore, xCGW is deployed in the center, and xDGW is distributed and deployed at the next deployment position of xCGW. For example, xCGW is deployed in TCN control plane of core network in beijing city, and xDGW is deployed in TCN control plane of core network in western urban area belonging to beijing city.
As can be seen from fig. 7, the embodiment of the present invention is compatible with existing networks: after CU separation, the network element function of the trunking gateway (xCGW+xDGW) and the external B-trunk sub-network service interface are unchanged, and the trunking gateway can be normally connected with all network elements of the existing network without changing peripheral network elements. Moreover, xCGW centralizes deployment: the xCGW unifies the signaling interface to connect with the peripheral equipment, thereby simplifying network deployment.
In addition, xDGW distributed deployment: a multi-core network architecture is used in a multi-place networking scenario. For the establishment of roaming user cluster service, the signaling surface route: UE- > eNB- > eMME- > TCF- > xCGW- > eMME- > eNB- > UE; user plane routing: UE- > eNB- > xDGW. Because the xDGW can be close to the user, the xDGW can be deployed to the city level or even lower, the service access path is shortened, and the service experience of the user is improved.
Fig. 8 is a schematic diagram of a cluster core CU separation architecture at the time of multi-core deployment according to the present invention.
In fig. 8, the control plane and the user plane of the gateway are separated: splitting the gateway logic network element of the cluster core network, namely splitting the SGW into SGW-C and SGW-U, PGW into PGW-C and PGW-U. Moreover, a newly-added definition standard interface between TCF and TMF supports TMF separation deployment; meanwhile, the SGW/PGW/TMF integrated scene is still supported, and the cluster gateway is split into:
(1) A cluster-enhanced centralized gateway (xCGW), the xCGW including SGW-C and PGW-C;
(2) Cluster enhanced distributed gateway xDGW1 for subnet 1, xDGW1 comprising SGW-U, PGW-U and TMF.
(3) The cluster of the subnet 2 enhances the distributed gateway xDGW2, the xDGW2 comprises SGW-U, PGW-U and TMF.
Furthermore, xCGW is deployed in the center, and xDGW1 and xDGW2 are distributed and deployed at the deployment position of the next stage of xCGW. For example, xCGW is deployed in TCN control plane of core network in beijing, while xDGW1 is deployed in TCN control plane of core network in western urban area belonging to beijing; and xDGW2 is deployed in the TCN control plane of the east urban core network belonging to beijing.
As can be seen from fig. 8, the embodiment of the present invention is compatible with existing networks: after CU separation, the network element function of the trunking gateway (xCGW+xDGW) and the external B-trunk sub-network service interface are unchanged, and the trunking gateway can be normally connected with all network elements of the existing network without changing peripheral network elements. Moreover, xCGW centralizes deployment: the xCGW unifies the signaling interface to connect with the peripheral equipment, thereby simplifying network deployment. In addition, xDGW distributed deployment: a multi-core network architecture is used in a multi-place networking scenario. Establishing cluster service for roaming users: signaling plane routing: UE- > eNB- > eMME- > TCF- > xCGW- > eMME- > eNB- > UE; user plane routing: UE- > eNB- > xDGW. Because the xDGW can be close to the user, the xDGW can be deployed to the city level or even lower, the service access path is shortened, and the service experience of the user is improved.
Fig. 9 is a flowchart of a deployment method of core network devices for broadband trunking communication according to the present invention.
As shown in fig. 9, the method includes:
step 901: splitting SGW into SGW-C and SGW-U; the PGW is split into PGW-C and PGW-U.
Step 902: PGW-C and SGW-C are integrated as a cluster-enhanced centralized gateway, and PGW-U, SGW-U and TMF are integrated as a cluster-enhanced distributed gateway.
Step 903: and the cluster enhanced centralized gateway is deployed in the center, and the cluster enhanced distributed gateway is deployed in a distributed manner.
In one embodiment, the method further comprises integrating a TCF into the cluster-enhanced centralized gateway, connecting the SGW-C and the SGW-U via a Sxa interface, connecting the PGW-C and the PGW-U via a Sxb interface, and connecting the TCF and the TMF via an interface set based on a packet forwarding control protocol PFCP.
In one embodiment, the splitting the PGW into a PDN gateway control plane part PGW-C and a PDN gateway user plane part PGW-U includes: dividing PGW-U selecting capability, 2.S5/S8 tunnel IP and TEIDU distributing capability, user address distributing capability, PGW external signaling centralization interface capability, gx or Gy or Ga or remote authentication dial-in user service Radius session control capability, PCC strategy control and bearing binding capability, GTPC path management capability, legal monitoring X1/X2/X3-C capability, cluster bearing establishment, modification and deletion capability into PGW-C; and dividing the cluster data routing and forwarding capability, charging data collection capability, three-four layer/seven layer message analysis and service control capability, GTPU path management capability and legal monitoring X3-U capability of the PGW into PGW-U.
In one embodiment, the splitting the SGW into a serving gateway control plane part SGW-C and a serving gateway user plane part SGW-U comprises; dividing SGW-U selecting capability, S1-U and S5/S8-U tunnel IP and TEIDU distributing capability, access and mobility session control capability, roaming charging ticket capability, downlink data notification message forwarding capability, GTPC path management capability and legal monitoring X1/X2/X3-C capability of SGW into SGW-C; the SGW forwarding control capability, roaming charging data collection capability, idle state downlink data caching capability, GTPU path management capability, legal interception X3-U capability and trunking service data copying and distributing capability of the SGW are divided into SGW-U.
In summary, compared with the current B-trunk standard definition architecture, the cluster core network CU separation architecture according to the embodiment of the present invention has at least the following advantages:
(1) Centralized deployment of control planes, reduction of signaling plane interfacing: the control plane of the cluster core network comprises eHSS, xCGW, eMME, TCF network elements which are deployed in a centralized way, so that S10/S5/S8/S6a/TC1/TC2 link configuration (including Gx/Gy/Ga interfaces and the like if a public network terminal is docked, charging and the like) between the multi-core networks is avoided, and configuration complexity is reduced.
(2) And the user plane is moved downwards for deployment, so that service experience is improved: xCGW selects PGW-U based on APN/location, SGW-U and TMF based on a unification deployment, such that: aiming at the roaming user, the roaming xDGW is directly used without detouring to the home xDGW, so that the time delay of a user plane is greatly reduced, and the user service experience is improved; aiming at the sinking of the xDGW of the local user and the termination of the cluster service at the xDGW, the user access time delay is shortened and the user service experience is improved by locally unloading the traffic.
(3) And transmission resources are saved: the user plane moves downwards, so that transmission to a central control point is saved for the client, the pressure of a central node is reduced, and transmission resources are saved.
(4) Support smooth evolution towards 5 GC: the architecture of the 5G core network has been finalized in the standard, based on a architecture where the control plane and the user plane are separated, and a service interface is adopted between the control planes. From the network evolution route from 4G to 5G, the MME network element evolves to AMF in 5G, and the SPGW evolves to SMF+UPF in 5G, wherein SMF is a control plane and SMF is a user plane. This means that gateway C/U separation is the necessary way to the 5G core network, and B-trunk cluster core network introduces CU separation, which can support smooth evolution towards 5 GC.
Fig. 10 is a block diagram of a deployment apparatus of a core network device for broadband trunking communication with a memory-processor architecture according to the present invention.
As shown in fig. 10, the deployment apparatus of the core network device for broadband trunking communication includes: a processor 1001 and a memory 1002; in which a memory 1002 has stored therein an application executable by a processor 1001 for causing the processor 1001 to perform the deployment method of a core network device for broadband trunking communication according to any one of the above.
The memory 1002 may be implemented as various storage media such as an electrically erasable programmable read-only memory (EEPROM), a Flash memory (Flash memory), a programmable read-only memory (PROM), and the like. The processor 1001 may be implemented to include one or more central processors or one or more field programmable gate arrays, where the field programmable gate arrays integrate one or more central processor cores. In particular, the central processor or central processor core may be implemented as a CPU or MCU.
It should be noted that not all the steps and modules in the above processes and the structure diagrams are necessary, and some steps or modules may be omitted according to actual needs. The execution sequence of the steps is not fixed and can be adjusted as required. The division of the modules is merely for convenience of description and the division of functions adopted in the embodiments, and in actual implementation, one module may be implemented by a plurality of modules, and functions of a plurality of modules may be implemented by the same module, and the modules may be located in the same device or different devices.
The hardware modules in the various embodiments may be implemented mechanically or electronically. For example, a hardware module may include specially designed permanent circuits or logic devices (e.g., special purpose processors such as FPGAs or ASICs) for performing certain operations. A hardware module may also include programmable logic devices or circuits (e.g., including a general purpose processor or other programmable processor) temporarily configured by software for performing particular operations. As regards implementation of the hardware modules in a mechanical manner, either by dedicated permanent circuits or by circuits that are temporarily configured (e.g. by software), this may be determined by cost and time considerations.
The present invention also provides a machine-readable storage medium storing instructions for causing a machine to perform a method as described herein. Specifically, a system or apparatus provided with a storage medium on which a software program code realizing the functions of any of the above embodiments is stored, and a computer (or CPU or MPU) of the system or apparatus may be caused to read out and execute the program code stored in the storage medium. Further, some or all of the actual operations may be performed by an operating system or the like operating on a computer based on instructions of the program code. The program code read out from the storage medium may also be written into a memory provided in an expansion board inserted into a computer or into a memory provided in an expansion unit connected to the computer, and then, based on instructions of the program code, a CPU or the like mounted on the expansion board or the expansion unit may be caused to perform part or all of actual operations, thereby realizing the functions of any of the above embodiments.
Storage medium implementations for providing program code include floppy disks, hard disks, magneto-optical disks, optical disks (e.g., CD-ROMs, CD-R, CD-RWs, DVD-ROMs, DVD-RAMs, DVD-RWs, DVD+RWs), magnetic tapes, non-volatile memory cards, and ROMs. Alternatively, the program code may be downloaded from a server computer or cloud by a communications network.
In this document, "schematic" means "serving as an example, instance, or illustration," and any illustrations, embodiments described herein as "schematic" should not be construed as a more preferred or advantageous solution. For simplicity of the drawing, the parts relevant to the present invention are shown only schematically in the drawings, and do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. In this document, "a" does not mean to limit the number of relevant portions of the present invention to "only one thereof", and "an" does not mean to exclude the case where the number of relevant portions of the present invention is "more than one". In this document, "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like are used merely to indicate relative positional relationships between the relevant portions, and do not limit the absolute positions of the relevant portions.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A core network device for broadband trunking communication, comprising:
the cluster enhanced centralized gateway comprises a PDN gateway control plane part PGW-C and a serving gateway control plane part SGW-C;
the cluster enhanced distributed gateway comprises a PDN gateway user plane part PGW-U, a service gateway user plane part SGW-U and a cluster media function TMF;
the deployment mode of the cluster enhancement centralized gateway is central deployment, the deployment mode of the cluster enhancement distributed gateway is distributed deployment, and the cluster enhancement distributed gateway is distributed and deployed at the next stage deployment position of the cluster enhancement centralized gateway;
the cluster-enhanced centralized gateway further comprises a cluster control function TCF, wherein the SGW-C and the SGW-U are connected through a Sxa interface, the PGW-C and the PGW-U are connected through a Sxb interface, and the TCF and the TMF are connected through an interface set based on a message forwarding control protocol PFCP.
2. The core network device for broadband trunked communication according to claim 1, wherein the PGW-C comprises at least one of:
means for PGW-U selection; means for S5/S8 tunnel IP and user plane tunnel terminal identification TEIDU allocation; means for user address allocation; PGW external signaling centralization interface; means for Gx or Gy or Ga or remote authentication dial-in user service Radius session control; means for policy control and charging PCC and bearer binding; means for GTPC path management; means for lawful interception of X1/X2/X3-C; means for cluster bearer establishment, modification and deletion.
3. The broadband trunked communication core network device of claim 1 wherein the PGW-U comprises at least one of:
means for cluster data routing and forwarding; means for billing data collection; the device is used for three-layer and four-layer/seven-layer message analysis and service control; means for GTPU path management; means for lawfully listening for X3-U.
4. The core network device for broadband trunked communication according to claim 1, wherein the SGW-C comprises at least one of:
means for SGW-U selection; means for S1-U and S5/S8-U tunnel IP and TEIDU allocation; means for access and mobility session control; means for roaming the billing ticket; means for forwarding a downstream data notification message; means for GTPC path management; means for lawful interception of X1/X2/X3-C.
5. The broadband trunked communication core network device of claim 1 wherein the SGW-U comprises at least one of:
means for SGW forwarding control; means for roaming billing data collection; a device for buffering downlink data in Idle state; means for GTPU path management; means for lawfully listening for X3-U; apparatus for replication and distribution of cluster traffic data.
6. A method for deploying core network equipment for broadband trunking communication, comprising:
splitting a service gateway SGW into a service gateway control plane part SGW-C and a service gateway user plane part SGW-U; splitting a PDN gateway PGW into a PDN gateway control plane part PGW-C and a PDN gateway user plane part PGW-U;
integrating a PDN gateway control plane part PGW-C and a service gateway control plane part SGW-C into a cluster enhancement centralized gateway, and integrating a PDN gateway user plane part PGW-U, a service gateway user plane part SGW-U and a cluster media function TMF into a cluster enhancement distributed gateway;
the cluster enhancement centralized gateway is deployed in a center, and the cluster enhancement distributed gateway is deployed in a distributed mode, wherein the cluster enhancement distributed gateway is deployed in a next deployment position of the cluster enhancement centralized gateway in a distributed mode;
the method further comprises the steps of:
integrating a cluster control function TCF into a cluster enhancement centralized gateway;
the SGW-C and the SGW-U are connected through a Sxa interface, the PGW-C and the PGW-U are connected through a Sxb interface, and the TCF and the TMF are connected through an interface set based on a message forwarding control protocol PFCP.
7. The deployment method of core network equipment for broadband trunking communication according to claim 6, wherein,
the splitting the PGW into PGW-C and PGW-U comprises:
splitting PGW-U selecting capability, 2.S5/S8 tunnel IP and user plane tunnel terminal identification TEIDU distributing capability, user address distributing capability, PGW external signaling centralization interface capability, gx or Gy or Ga or remote authentication dial-in user service Radius session control capability, PCC strategy control and bearing binding capability, GTPC path management capability, legal monitoring X1/X2/X3-C capability, cluster bearing establishment, modification and deletion capability into PGW-C; and splitting the cluster data routing and forwarding capability, the charging data collection capability, the three-four layer/seven layer message analysis and service control capability, the GTPU path management capability and the legal monitoring X3-U capability of the PGW into PGW-U.
8. The deployment method of core network equipment for broadband trunking communication according to claim 6, wherein,
splitting the SGW into SGW-C and SGW-U comprises; splitting SGW-U selection capability, S1-U and S5/S8-U tunnel IP and TEIDU allocation capability, access and mobility session control capability, roaming billing ticket capability, downstream data notification message forwarding capability, GTPC path management capability, legal interception X1/X2/X3-C capability of the SGW into SGW-C; and splitting the SGW forwarding control capability, roaming charging data collection capability, idle state downlink data caching capability, GTPU path management capability, legal monitoring X3-U capability and cluster service data copying and distributing capability of the SGW into SGW-U.
9. The deployment device of the core network equipment of the broadband cluster communication is characterized by comprising a processor and a memory;
the memory stores therein an application executable by the processor for causing the processor to perform the deployment method of the core network device of broadband trunked communication according to any one of claims 6 to 8.
10. A computer readable storage medium having stored therein computer readable instructions for performing the deployment method of the core network device of broadband trunked communication according to any one of claims 6 to 8.
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