CN113965967B - Mobile switching method and system for specific terminal equipment under cellular wireless communication architecture - Google Patents
Mobile switching method and system for specific terminal equipment under cellular wireless communication architecture Download PDFInfo
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- CN113965967B CN113965967B CN202111072061.5A CN202111072061A CN113965967B CN 113965967 B CN113965967 B CN 113965967B CN 202111072061 A CN202111072061 A CN 202111072061A CN 113965967 B CN113965967 B CN 113965967B
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- 230000001413 cellular effect Effects 0.000 title claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000010295 mobile communication Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 abstract description 6
- 230000011664 signaling Effects 0.000 abstract description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/165—Performing reselection for specific purposes for reducing network power consumption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
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Abstract
The invention discloses a mobile switching method and a mobile switching system of specific terminal equipment under a cellular wireless communication architecture. According to the method, the specific terminal equipment is associated with the specific area, when the specific terminal equipment moves in the specific area, namely, the mobile terminal equipment moves from a cell of a current source base station in the specific area to a cell of a target base station, an original return link between a core network and the source base station is not deleted, a link between the source base station and the target base station is created, and the return link between the target base station and the core network is built in a cascading mode with the original return link, so that the mobile switching flow of the specific terminal equipment in the specific area is completed. The switching method only relates to the specific area associated with the specific terminal equipment and the cell in the specific area, simplifies the mobile switching process of the specific terminal in the specific area, reduces the signaling overhead of switching, saves network resources and improves the service quality of the wireless network.
Description
Technical Field
The invention belongs to the technical field of wireless communication, and particularly relates to a mobile switching method and a mobile switching system of specific terminal equipment under a cellular wireless communication architecture.
Background
With the rapid development of technology and economy in the current age, the arrival of the 5G age brings great convenience to the life of people. Various mobile terminal devices such as mobile phones, tablets, notebook computers and the like are layered endlessly, the number of mobile terminal devices is greatly increased, and the mobility of terminal users is increased, so that the demand for network traffic is exponentially increased. On the premise of continuously rising network traffic demands, related researches such as optimizing around a 5G network transmission architecture and improving network service quality have also been carried out on schedules.
With the development of mobile communication technology and the continuous popularization of mobile communication devices such as mobile phones and tablets. The number of the mobile communication equipment nodes accessed in the fifth generation communication technology network is greatly increased, and great challenges are provided for the node capacity borne by the network, the management of the mobile terminal equipment and the service quality.
The management method of the mobile terminal equipment commonly used at present mainly comprises local management and network backhaul path transfer. As shown in fig. 2, only specific mobile terminal devices UE, source base station Source gNB, target base station Target gNB, access and mobility management function AMF, user plane function UPF(s) are involved. After the specific mobile terminal equipment completes the registration process in the source base station, a wireless backhaul link is established between the core network, the source base station and the specific terminal equipment. When a specific terminal device moves from a source base station to a target base station, firstly, a switching preparation stage is entered, an AMF provides mobile control information, after receiving the information, the source base station and the mobile terminal device start to process the control information and upload reports, and meanwhile, the source base station makes a handover decision and sends a handover application to the target base station. The target base station performs admission control processing and then sends a corresponding handover application to the source base station; and then entering a switching execution stage, triggering a handover at a Uu port of the source base station, and sending SN state information to the target base station. The mobile terminal device starts to detach from the old cell base station and synchronize to the new cell base station. The source base station begins transmitting buffered and in-flight user data to the target base station. The target base station caches the user data from the source base station, and the mobile terminal device synchronizes to the new cell base station and completes the handover procedure of the radio control resource. And finally, entering a switching completion stage, and sending a path switching request to the AMF by the target base station. AMF and UPF(s) store 5G CN internal information and actual DL path information related to path switching and send end mark information to a source base station, then the source base station sends the end mark information to a target base station, the AMF sends a path switching application response to the target base station, and the target base station sends context release information of mobile terminal equipment to the source base station, so that the handover process of the infinite backhaul network path of the whole mobile terminal equipment is completed. With the advent of the 5G era, the number of mobile terminal devices has been exponentially increased, and the handover procedure of the wireless backhaul network of the conventional mobile terminal device is too complex, so that signaling overhead is greatly increased, network resources are occupied, the setup time of the wireless backhaul network path is increased, and the service quality of the wireless network is reduced.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide a wireless backhaul path optimization method for mobile terminal equipment under a 5G/4G network architecture, which only relates to mobile terminal equipment (UE), a Source base station Source gNB, a Target base station Target gNB, an access and mobility management function (AMF) and a User Plane Function (UPF). The method for establishing the wireless backhaul network path of the specific mobile terminal equipment is optimized under the existing network architecture, signaling overhead is reduced, network resources are saved, and wireless network service quality is improved.
The technical solution for realizing the purpose of the invention is as follows: a method of mobile handover of a particular terminal device in a cellular radio communication architecture, the method comprising the steps of:
step 1, establishing association between specific terminal equipment and a specific area in a core network;
step 2, when the specific terminal equipment moves in the specific area, namely, when the specific area is switched from the current source base station to the target base station, a link between the source base station and the target base station is established, and a backhaul link between the target base station and the core network is established in a cascading mode with the original backhaul link, so that the mobile switching of the specific terminal equipment from the source base station to the target base station is completed; the original backhaul link is a backhaul link between a core network and a source base station for the specific terminal equipment.
Further, in step 1, the specific area includes one or more base stations, and is identified by a globally unique identifier on the network side.
Further, in step 1, the association between the specific terminal device and the specific area is established in the core network, specifically: when a specific terminal is accessed to the network, the core network completes the association of the specific terminal equipment and the specific area identifier.
Further, the constructing the backhaul link between the target base station and the core network by cascading with the original backhaul link specifically includes: the source base station implements link concatenation according to the identifier of the specific terminal device.
Further, after the mobile handover of the specific terminal device from the source base station to the target base station is completed, the data transmission mode is as follows: the data message of the downlink service reaches the target base station from the core network through the cascade backhaul link, and the data message of the uplink service reaches the core network from the target base station through the cascade backhaul link.
Further, step 2 further includes:
and when the moving range of the specific terminal equipment exceeds a specific area, removing the original backhaul link, namely the backhaul link between the core network and the source base station, and reestablishing the backhaul link between the target base station and the core network.
A mobile handoff system for a particular terminal device in a cellular wireless communication architecture, said system comprising:
a core network;
a specific area, representing the moving range of specific terminal equipment, comprising a plurality of base stations;
a specific terminal device;
the association establishing module is used for establishing association between the specific terminal equipment and the specific area in the core network;
the mobile switching module is used for realizing the following steps: when a specific terminal device moves in a specific area, namely, when the specific terminal device is switched from a current source base station to a target base station in the specific area, a link between the source base station and the target base station is established, and a backhaul link between the target base station and a core network is established in a cascading mode with an original backhaul link, so that the mobile switching of the specific terminal device from the source base station to the target base station is completed; the original backhaul link is a backhaul link between a core network and a source base station for the specific terminal equipment.
Further, the mobile switching module is further configured to implement: and when the moving range of the specific terminal equipment exceeds a specific area, removing the original backhaul link, namely the backhaul link between the core network and the source base station, and reestablishing the backhaul link between the target base station and the core network.
Further, the system further comprises:
and the data transmission module is used for transmitting the data message of the downlink service from the core network to the target base station through the cascade backhaul link and transmitting the data message of the uplink service from the target base station to the core network through the cascade backhaul link.
Compared with the prior art, the invention has the remarkable advantages that: by establishing a network cascade connection method between a source base station and a target base station, when a mobile terminal device moves from the source base station to the target base station, an original wireless backhaul network path is reserved, and a new wireless backhaul network path is constructed by combining the cascade connection between the source base station and the target base station.
The invention is described in further detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram of wireless backhaul network path establishment for a particular mobile terminal device in one embodiment.
Fig. 2 is a flow diagram of a handoff of a wireless backhaul network path of a mobile terminal device in one embodiment.
Fig. 3 is a flow diagram of the establishment of an wireless backhaul network cascade path for a mobile terminal device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
In one embodiment, a mobile handover method for a specific terminal device under a cellular wireless communication architecture is provided, the method comprising the steps of:
step 1, establishing association between specific terminal equipment and a specific area in a core network;
step 2, when the specific terminal equipment moves in the specific area, namely, when the specific area is switched from the current source base station to the target base station, a link between the source base station and the target base station is established, and a backhaul link between the target base station and the core network is established in a cascading mode with the original backhaul link, so that the mobile switching of the specific terminal equipment from the source base station to the target base station is completed; the original backhaul link is a backhaul link between a core network and a source base station for the specific terminal equipment.
Fig. 1 is a diagram illustrating an example of wireless backhaul network path establishment in a 5G/4G network application scenario according to the present invention, where the embodiment mainly includes a specific mobile terminal, a source base station, a target base station, and a core network. When the specific mobile terminal is in the coverage area of the source base station, an original backhaul link is established among the core network, the source base station and the specific mobile terminal, and when the specific mobile terminal moves to the coverage area of the target base station, the core network controls to establish an inter-base station backhaul link between the source base station and the target base station and establishes a new backhaul link in cascade connection with the original backhaul link.
Further, in one embodiment, the specific area in step 1 includes one or more base stations (cells), and is identified by a globally unique identifier on the network side.
Further, in one embodiment, in step 1, the association between the specific terminal device and the specific area is established in the core network, specifically: when a specific terminal is accessed to the network, the core network completes the association of the specific terminal equipment and the specific area identifier.
Further, in one embodiment, the constructing the backhaul link between the target base station and the core network by cascading with the original backhaul link specifically includes: the source base station implements link concatenation according to the identifier of the specific terminal device.
Further, in one embodiment, after the mobile handover of the specific terminal device from the source base station to the target base station is completed, the data transmission mode is as follows: the data message of the downlink service reaches the target base station from the core network through the cascade backhaul link, and the data message of the uplink service reaches the core network from the target base station through the cascade backhaul link.
Further, in one embodiment, step 2 further includes:
and when the moving range of the specific terminal equipment exceeds a specific area, removing the original backhaul link, namely the backhaul link between the core network and the source base station, and reestablishing the backhaul link between the target base station and the core network.
In one embodiment, as shown in fig. 3, a flowchart of wireless backhaul network path establishment after a specific mobile terminal device moves from a source base station to a target base station in a specific area according to the technical solution of the present invention is shown, where the example mainly includes a specific mobile terminal, a source base station, a target base station, and a core network. The establishment of the wireless backhaul network path provided in the present embodiment includes the following steps:
a switching preparation stage:
step 0: when a specific terminal device is in a specific area, after the coverage area of a source base station moves to the coverage area of a target base station, an AMF (access and mobility management function) sends mobility control information to the source base station and the target base station;
step 1: the source base station and the specific terminal equipment coordinate to process the control information and make reports to each other;
step 2: after cooperation with a specific terminal device, the source base station makes a handover decision;
step 3: the source base station sends a switching request with an Xn path creation request to the target base station;
step 4: the target base station performs admission control processing;
step 5: after the target base station completes the admission control process, the target base station sends a switching request confirmation with an Xn path creation response to the source base station.
And a switching execution stage:
step 6: triggering a handover procedure at a Uu port of a source base station;
step 7: the source base station sends SN sequence number state information to the target base station, and meanwhile, the mobile terminal equipment starts to be separated from the old cell base station and is synchronized to the new cell base station;
step 8: the mobile terminal device synchronizes to the new cell base station and completes the handover procedure of the radio control resources.
And a switching completion stage:
step 9: the target base station sends context release information of the mobile terminal equipment to the source base station; at this time, a downlink data link is constructed from the UPF(s) (user plane function) to the source base station and then to the target base station, and downlink user data is transmitted; and constructing an uplink data link from the target base station to the source base station and then to the UPF(s) and transmitting uplink user data. User data interaction between the specific terminal equipment and the target base station is realized. The establishment of the wireless backhaul network path is completed.
In one embodiment, a mobile switching system for a particular terminal device under a cellular wireless communication architecture is provided, the system comprising:
a core network;
a specific area, representing the moving range of specific terminal equipment, comprising a plurality of base stations;
a specific terminal device;
the association establishing module is used for establishing association between the specific terminal equipment and the specific area in the core network;
the mobile switching module is used for realizing the following steps: when a specific terminal device moves in a specific area, namely, when the specific terminal device is switched from a current source base station to a target base station in the specific area, a link between the source base station and the target base station is established, and a backhaul link between the target base station and a core network is established in a cascading mode with an original backhaul link, so that the mobile switching of the specific terminal device from the source base station to the target base station is completed; the original backhaul link is a backhaul link between a core network and a source base station for the specific terminal equipment.
Further, in one embodiment, the mobile switching module is further configured to implement: and when the moving range of the specific terminal equipment exceeds a specific area, removing the original backhaul link, namely the backhaul link between the core network and the source base station, and reestablishing the backhaul link between the target base station and the core network.
Further, in one embodiment, the system further comprises:
and the data transmission module is used for transmitting the data message of the downlink service from the core network to the target base station through the cascade backhaul link and transmitting the data message of the uplink service from the target base station to the core network through the cascade backhaul link.
Further, in one embodiment, the core network is a core network based on 5GC or LTE technology; the specific terminal equipment is mobile communication equipment in a 5G/4G network.
For a specific limitation of the mobile handover system of the specific terminal device in the cellular radio communication architecture, reference may be made to the above limitation of the mobile handover method of the specific terminal device in the cellular radio communication architecture, and the detailed description is omitted herein. The various modules in the mobile switching system of a particular terminal device under the above-described cellular wireless communication architecture may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In summary, the method for establishing the wireless backhaul network path of the specific mobile terminal device is optimized under the existing network architecture, so that signaling overhead is reduced, network resources are saved, and wireless network service quality is improved.
The foregoing has outlined and described the basic principles, features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A method for mobile handover of a particular terminal device in a cellular radio communication architecture, the method comprising the steps of:
step 1, establishing association between specific terminal equipment and a specific area in a core network;
step 2, when the specific terminal equipment moves in the specific area, namely, when the specific area is switched from the current source base station to the target base station, a link between the source base station and the target base station is established, and a backhaul link between the target base station and the core network is established in a cascading mode with the original backhaul link, so that the mobile switching of the specific terminal equipment from the source base station to the target base station is completed; the original backhaul link is a backhaul link between a core network and a source base station for the specific terminal equipment.
2. A method of mobile handover of a specific terminal device in a cellular radio communication architecture according to claim 1, wherein the specific area in step 1 comprises one or more base stations, identified by a globally unique identifier on the network side.
3. The method for mobile handover of a specific terminal device in a cellular radio communication architecture according to claim 2, wherein in step 1, the association between the specific terminal device and the specific area is established in the core network, specifically: when a specific terminal is accessed to the network, the core network completes the association of the specific terminal equipment and the specific area identifier.
4. The mobile switching method of a specific terminal device under a cellular radio communication architecture according to claim 3, wherein the constructing a backhaul link between a target base station and a core network by cascading with an original backhaul link specifically includes: the source base station implements link concatenation according to the identifier of the specific terminal device.
5. The mobile switching method of a specific terminal device in a cellular radio communication architecture according to claim 4, wherein after the mobile switching of the specific terminal device from the source base station to the target base station is completed, the data transmission mode is as follows: the data message of the downlink service reaches the target base station from the core network through the cascade backhaul link, and the data message of the uplink service reaches the core network from the target base station through the cascade backhaul link.
6. The method for mobile switching of a particular terminal device in a cellular radio communication architecture according to claim 5, wherein step 2 further comprises:
and when the moving range of the specific terminal equipment exceeds a specific area, removing the original backhaul link, namely the backhaul link between the core network and the source base station, and reestablishing the backhaul link between the target base station and the core network.
7. A mobile handoff system for a particular terminal device in a cellular wireless communication architecture, said system comprising:
a core network;
a specific area, representing the moving range of specific terminal equipment, comprising a plurality of base stations;
a specific terminal device;
the association establishing module is used for establishing association between the specific terminal equipment and the specific area in the core network;
the mobile switching module is used for realizing the following steps: when a specific terminal device moves in a specific area, namely, when the specific terminal device is switched from a current source base station to a target base station in the specific area, a link between the source base station and the target base station is established, and a backhaul link between the target base station and a core network is established in a cascading mode with an original backhaul link, so that the mobile switching of the specific terminal device from the source base station to the target base station is completed; the original backhaul link is a backhaul link between a core network and a source base station for the specific terminal equipment.
8. The mobile switching system of claim 7, wherein the mobile switching module is further configured to implement: and when the moving range of the specific terminal equipment exceeds a specific area, removing the original backhaul link, namely the backhaul link between the core network and the source base station, and reestablishing the backhaul link between the target base station and the core network.
9. The mobile switching system of claim 7, wherein the system further comprises:
and the data transmission module is used for transmitting the data message of the downlink service from the core network to the target base station through the cascade backhaul link and transmitting the data message of the uplink service from the target base station to the core network through the cascade backhaul link.
10. The mobile switching system of a specific terminal device under a cellular radio communication architecture according to claim 7, wherein the core network is a core network based on 5GC or LTE technology; the specific terminal equipment is mobile communication equipment in a 5G/4G network.
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Address after: 222001 No.18 Shenghu Road, Lianyungang City, Jiangsu Province Applicant after: The 716th Research Institute of China Shipbuilding Corp. Address before: 222001 No.18 Shenghu Road, Lianyungang City, Jiangsu Province Applicant before: 716TH RESEARCH INSTITUTE OF CHINA SHIPBUILDING INDUSTRY Corp. |
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| GR01 | Patent grant |