WO2019047706A1

WO2019047706A1 - User terminal switching method and device, and system

Info

Publication number: WO2019047706A1
Application number: PCT/CN2018/101275
Authority: WO
Inventors: 许朝; 谢人超; 董红
Original assignee: 华为技术有限公司
Priority date: 2017-09-07
Filing date: 2018-08-20
Publication date: 2019-03-14
Also published as: CN107580344A; CN107580344B

Abstract

The present application provides a user terminal switching method and device, and a system, relating to the field of communication technologies, being able to reduce the number of times of transmitting a request and the waiting delay. The method comprises: receiving switching information sent by a destination UAP, the switching information being used to request for the switching of a UE to the destination UAP; acquiring, according to the switching information, information concerning a first interest packet, the information concerning the first interest packet comprising the name of the content of the first interest packet and user information concerning the UE, the first interest packet being an interest packet which has been sent by the UE to an original UAP connected to the UE that has not been responded to; and sending interest packet information to the destination UAP, the interest packet information comprising the name of the content of the first interest packet and the user information, the interest packet information being used by the destination UAP to modify a first pending interest table (PIT) stored in the destination UAP, such that the UAP sends, upon receipt of the data packet requested by the first interest packet, the data packet to the UE according to the modified first PIT.

Description

Method, device and system for user terminal switching

This application claims the priority of the Chinese Patent Application filed on Sep. 7, 2017, the Chinese Patent Office, Application No. 201710800826.X, entitled "A Method, Apparatus and System for Switching User Terminals", the entire contents of which are hereby incorporated by reference. The citations are incorporated herein by reference.

Technical field

The present application relates to the field of communications technologies, and in particular, to a method, device, and system for user equipment (UE) handover.

Background technique

Named data networking (NDN) is a content-centric mobile network that supports name routing. Network nodes in the NDN can cache packet content. The UE requests a data packet corresponding to the content name by transmitting an interest packet to the network node connected thereto.

As shown in Figure 1, it is a schematic diagram of an NDN topology. The network node S is a content source, and is configured to send a corresponding data packet according to the received interest packet. The network nodes N1 and N3 are requesting nodes for the UE to access the network. The network nodes N2, N4 and N5 are forwarding nodes for forwarding interest packets and data packets. When the UE connects with N1, it sends an interest packet to N1 to request the corresponding data packet. After receiving the interest packet, N1 forwards the interest packet along the path of N1, N2, N5 and S. After receiving the interest packet, the S returns the corresponding data packet to the UE along the original path. When the UE sends the interest packet to N1, but before receiving the data packet of the interest packet request, it moves to N3 and establishes a connection with N3, that is, the UE has switched. Then the UE needs to resend the interest packet to N3, and requests the corresponding data packet through N3 again.

In the above process, when the UE has a handover, the UE needs to make a secondary request for each interest packet that has not received the response. Since each request requires a certain period of time to be responded, it is difficult to meet the service requirements of the UE for real-time communication services.

Summary of the invention

The present application provides a method, an apparatus, and a system for UE handover, which can reduce the number of request transmissions and the waiting delay.

In a first aspect, the present application provides a method for UE handover, including: a first mobile control center MCC receiving handover information sent by a destination user attachment point UAP, the handover information being used to request to switch a UE to the destination UAP, the destination UAP Controlled by the first MCC, the first MCC obtains information about the first interest packet according to the handover information, where the information of the first interest packet includes a content name of the first interest package and user information of the UE, where the first interest packet is Transmitting, by the UE, an interest packet that is not responded to the original UAP that is connected to the UE; the first MCC sends interest packet information to the destination UAP, where the interest packet information includes a content name of the first interest package and the user information, where The interest packet information is used by the UAP to modify the first pending interest table PIT stored in the UAP of the destination, so that the UAP, after receiving the data packet requested by the first interest packet, according to the modified first PIT The data packet is sent to the UE.

With the UE handover method provided by the present application, in the process of handover, the first MCC acquires the content name of the first interest packet that the UE has requested but has not yet responded to, and then uses the interest packet information to The content name and the user information of the UE are sent to the destination UAP for changing the PIT of the destination UAP, so that the destination UAP can return the data packet to the UE after receiving the data packet requested by the first interest packet. There is no need for the UE to make a second request for the first interest packet. Therefore, the number of request transmissions and the waiting delay are reduced, thereby improving the data request efficiency of the UE during the handover process.

Optionally, the switching information includes the user information and the switching instruction, where the original UAP is controlled by the first MCC, and the first MCC acquires the information of the first interest packet according to the switching information, including: determining, by the first MCC, the original information according to the user information. a UAP, the first MCC sends the handover indication information to the original UAP, where the handover indication information includes the handover instruction and the user information, so that the original UAP determines the first interest packet corresponding to the user information according to the handover instruction. The first MCC receives the information of the first interest packet sent by the original UAP.

Optionally, after the first MCC sends the interest packet information to the destination UAP, the method further includes: sending, by the first MCC, disconnection information to the original UAP, where the disconnection information is used to indicate that the original UAP disconnects from the UE.

The foregoing two alternative manners describe a specific process for the UE to perform intra-domain handover. After the destination UAP completes the handover, the first MCC can directly notify the original UAP port to connect with the UE, thereby avoiding the UE from switching between the original UAP and the original UAP. The connection continues to occupy the connection resources of the original UAP.

Optionally, the switching information includes the user information and the switching instruction, where the original UAP is controlled by the second MCC, and the first MCC acquires the information of the first interest packet according to the switching information, including: determining, by the first MCC, the second information according to the user information. The MCC sends the handover indication information to the original UAP via the second MCC, where the handover indication information includes the handover instruction and the user information, so that the original UAP determines, according to the handover instruction, the user information corresponding to the user information. Information of the first interest packet; the first MCC receives information of the first interest packet sent by the original UAP via the second MCC.

Optionally, the method further includes: sending, by the first MCC, the disconnection information to the original UAP via the second MCC, where the disconnection information is used to indicate that the original UAP disconnects from the UE.

The two optional methods describe the specific process of the UE performing the cross-domain handover. After the destination UAP completes the handover, the first MCC can notify the connection between the original UAP port and the UE by controlling the second MCC of the original UAP, thereby avoiding the UE being in the UE. After the handover, the connection with the original UAP continues to occupy the connection resources of the original UAP.

Optionally, the disconnection information further includes forwarding information, where the forwarding information is used by the original UAP to modify the second PIT stored in the original UAP.

In this optional manner, the second PIT of the original UAP is modified by forwarding information, so that when the data packet arrives at the original UAP, even if the UE has a handover, the original UAP can process the data packet according to the modified second PIT. The smooth return to the UE avoids the data interruption of the UE during the handover process and achieves seamless handover.

Optionally, the method further includes: the first MCC determines a transmission path for transmitting the data packet to the destination UAP; the first MCC sends the first modification information to the first content router CR on the transmission path, where the first The modification information is used to indicate that the first CR modifies the third PIT stored in the first CR, so that the first CR sends the received data packet to the destination UAP according to the modified third PIT.

Optionally, the original UAP is controlled by the second MCC. After the first MCC determines the transmission path for transmitting the data packet to the destination UAP, the method further includes: the first MCC to the first content gateway CGW on the transmission path. And sending, by the second CGW, the fourth PIT stored in the first CGW, so that the first CGW receives the received fourth PIT according to the modified The data packet is sent to the first CR.

Through these two alternatives, the first MCC determines the transmission path that can transmit the data packet to the destination UAP, and modifies the PIT of each network element on the transmission path. It is guaranteed that the destination UAP can receive the data packet and then send the data packet to the UE.

Optionally, after the first MCC sends the interest packet information to the destination UAP, the method further includes: the first MCC receiving the feedback information sent by the destination UAP, where the feedback information is used to indicate whether the first PIT before the modification exists. a content name of the first interest packet, and whether the data packet is cached in the destination UAP; the first MCC determines a transmission path for transmitting the data packet to the destination UAP, including: the first MCC determining the feedback The information indicates that the content name of the first interest packet does not exist in the first PIT before the modification, and when the data packet is not cached in the destination UAP, the transmission path is determined.

With this optional mode, the process of performing topology calculation and path calculation by the first MCC without determining the transmission path is avoided, thereby improving the switching efficiency.

In a second aspect, the application provides a method for UE handover, where the method includes: the second MCC receives the forwarding information sent by the first MCC, and the second MCC sends the third modification information to the second CR according to the forwarding information, where The third modification information is used by the second CR to modify the fifth PIT stored in the second CR, so that the second CR sends the received data packet of the first interest packet request to the first according to the modified fifth PIT. CR or a second CGW, the first CR is controlled by the first MCC, and the second CR and the second CGW are controlled by the second MCC.

Optionally, the modified fifth PIT is used to instruct the second CR to send the received data packet of the first interest packet request to the second CGW, where the method further includes: the second MCC, according to the forwarding information, to the second CGW. Sending a fourth modification information, where the fourth modification information is used by the second CGW to modify the sixth PIT stored in the second CGW, so that the second CGW, according to the modified sixth PIT, receives the received first interest packet. The requested data packet is sent to the first CGW.

Optionally, the method further includes: sending, by the second MCC, the fifth modification information to the original UAP according to the forwarding information, where the fifth modification information is used by the original UAP to modify the second PIT, so that the original UAP is based on the modified second PIT. The received data packet of the first interest packet request is sent to the second CR.

Optionally, before the second MCC receives the forwarding information sent by the first MCC, the method further includes: receiving, by the second MCC, handover indication information that is sent by the first MCC, where the handover indication information includes a handover instruction and user information of the UE; The MCC determines the original UAP connected to the UE according to the user information; the second MCC sends the handover indication information to the original UAP; the second MCC receives the information of the first interest packet sent by the original UAP, the first interest packet Sending, to the UE, an interest packet that is not responded to the original UAP; the second MCC sends interest packet information to the first MCC;

Optionally, the second MCC receives the forwarding information sent by the first MCC, where the second MCC receives the disconnection information sent by the first MCC, where the disconnection information is used to indicate that the original UAP disconnects from the UE, where The disconnection information includes the forwarding information; the second MCC sends the disconnection information to the original UAP.

In a third aspect, the present application provides a method for UE handover, where the method includes: when the target user attachment point UAP detects that the signal strength of the UE is greater than or equal to a preset threshold, the destination UAP is directed to the first mobile control center. The MCC sends the handover information, where the handover information is used to request to switch the UE to the destination UAP, and the destination UAP is controlled by the first MCC; the destination UAP receives the interest packet information sent by the first MCC, where the interest packet information includes a content name of the interest packet and user information of the UE, the first interest packet being an interest packet sent by the UE to the original UAP connected to the UE and not being responded; the destination UAP modifying the destination according to the interest packet information The first pending interest table PIT stored in the UAP is configured to enable the destination UAP to send the data packet to the UE according to the modified first PIT when receiving the data packet requested by the first interest packet.

Optionally, the first PIT includes a first local PIT and a first user pending interest table U-PIT, where the first local PIT is used to record a correspondence between a content name of the interest packet that is not responded to the destination UAP and a transmission port, The first U-PIT is used to record a correspondence between the user information and the content name of the interest packet that the destination UAP does not respond to.

Optionally, after the destination UAP modifies the first PIT stored in the destination UAP according to the information of the first interest packet, the method further includes: the destination UAP sending feedback information to the first MCC, where the feedback information is used to indicate the modification. Whether the content name of the first interest package exists in the first PIT and whether the data packet is cached in the destination UAP.

In this optional manner, the destination UAP sends feedback information to the first MCC for the first MCC to determine whether to determine the transmission path. Thereby, the process of topology calculation and path calculation of the first MCC without determining the transmission path is avoided, thereby improving the switching efficiency.

In a fourth aspect, the application provides a UE handover method, where the method includes: an original user attachment point UAP receives handover information sent by a mobile control center MCC that controls the original UAP, where the handover information includes a handover instruction and user information of the UE, The switching information is used to request to switch the UE to the destination UAP, and the original UAP is a UAP currently connected to the UE. The original UAP queries the second pending interest table PIT stored in the original UAP according to the switching instruction, and determines a content name of the first interest packet corresponding to the user information, the first interest packet being an interest packet sent by the UE to the original UAP and not being responded; the original UAP sending information of the first interest packet to the MCC, the first The information of the interest package includes the content name of the first interest package and the user information.

With the UE handover method provided by the present application, in the process of the handover, the original UAP determines, under the instruction of the first MCC, the content name of the first interest packet that the UE has not been responded to, and sends the information of the first interest packet. Give the first MCC. So that the first MCC sends the content name of the first interest packet and the user information of the UE to the destination UAP through the interest packet information, to change the PIT of the destination UAP, so that the destination UAP receives the first interest packet request. After the packet, the packet can be returned to the UE. There is no need for the UE to make a second request for the first interest packet. Therefore, the number of request transmissions and the waiting delay are reduced, thereby improving the data request efficiency of the UE during the handover process.

Optionally, the second PIT includes a second local PIT and a second user pending interest table U-PIT, where the second local PIT is used to record a correspondence between a content name of the interest packet that is not responded to by the original UAP and a transmission port, The second U-PIT is configured to record a correspondence between the user information and the content name of the interest packet that the original UAP does not respond to; the original UAP queries the second pending interest table PIT stored in the original UAP according to the switching instruction. Determining a content name of the first interest packet corresponding to the user information, the original UAP searching, in the second U-PIT, a content name of an unresponsive interest packet corresponding to the user information of the UE; the original UAP determining The second local PIT has a content name of the unresponsive interest packet corresponding to the user information of the UE, and the original UAP determines that the content name of the unresponsive interest packet corresponding to the user information of the UE is the first name. The content name of the interest package.

In this alternative way, a more accurate information of the first interest package can be obtained.

Optionally, after the original UAP sends the information of the first interest packet to the MCC, the method further includes: the original UAP receiving the disconnection information sent by the MCC; and the original UAP disconnecting from the UE according to the disconnection information. Connection.

In this optional manner, it is possible to prevent the connection between the UE and the original UAP from continuing to occupy the connection resources of the original UAP after the handover.

Optionally, the disconnection information further includes forwarding information. After the original UAP receives the disconnection information sent by the MCC, the method further includes: modifying, by the original UAP, the second PIT according to the forwarding information, so that the original UAP receives the When the first interest packet requests the data packet, the data packet is sent to the destination UAP or the content router CR according to the modified second PIT, and the CR is located on the transmission path for transmitting the data packet to the destination UAP. .

In this optional manner, the original UAP can modify the second PIT according to the forwarding information, so that when the data packet arrives at the original UAP, even if the UE switches, the original UAP can process the data packet according to the modified second PIT. The smooth return to the UE avoids the data interruption of the UE during the handover process and achieves seamless handover.

The fifth aspect, a first mobile control center MCC, comprising: a receiving unit, configured to receive handover information sent by a destination user attachment point UAP, where the handover information is used to request to switch the user terminal UE to the destination UAP, the destination UAP Controlling, by the first MCC, a processing unit, configured to acquire information about the first interest packet according to the handover information received by the receiving unit, where the information of the first interest packet includes a content name of the first interest packet and user information of the UE The first interest packet is an interest packet that is sent by the UE to the original UAP that is connected to the UE and is not responded. The sending unit is configured to send the interest packet information to the destination UAP, where the interest packet information includes the first interest. a content name of the package and the user information, the interest package information is used by the UAP to modify the first pending interest table PIT stored in the destination UAP, so that the UAP receives the data packet requested by the first interest packet, according to the The modified first PIT sends the data packet to the UE.

Optionally, the switching information includes the user information and the switching instruction, where the original UAP is controlled by the first MCC, and the processing unit acquires the information of the first interest packet according to the switching information, which includes: determining the original UAP according to the user information; The UAP sends the handover indication information, where the handover indication information includes the handover instruction and the user information, so that the original UAP determines information about the first interest packet corresponding to the user information according to the handover instruction; and receives the original UAP transmission. The information of the first interest package.

Optionally, the sending unit is further configured to: after sending the interest packet information to the destination UAP, send the disconnection information to the original UAP, where the disconnect information is used to indicate that the original UAP disconnects the UE.

Optionally, the switching information includes the user information and the switching instruction, where the original UAP is controlled by the second MCC, and the processing unit acquires the information of the first interest packet according to the switching information, specifically: determining, according to the user information, the second The MCC sends the handover indication information to the original UAP via the second MCC, where the handover indication information includes the handover instruction and the user information, so that the original UAP determines the first interest corresponding to the user information according to the handover instruction. Information of the packet; receiving, by the second MCC, information of the first interest packet sent by the original UAP.

Optionally, the sending unit is further configured to send, by using the second MCC, disconnection information to the original UAP, where the disconnection information is used to indicate that the original UAP disconnects from the UE.

Optionally, the processing unit is further configured to determine a transmission path for transmitting the data packet to the destination UAP, where the sending unit is further configured to send the first modification information to the first content router CR on the transmission path. The first modification information is used to indicate that the first CR modifies the third PIT stored in the first CR, so that the first CR sends the received data packet to the destination according to the modified third PIT. UAP.

Optionally, the original UAP is controlled by the second MCC, and the sending unit sends the second modification information to the first content gateway CGW on the transmission path, where the second modification information is used to indicate that the first CGW modifies the first a fourth PIT stored in the CGW, such that the first CGW sends the received data packet to the first CR according to the modified fourth PIT.

Optionally, the receiving unit is further configured to receive the feedback information sent by the destination UAP, where the feedback information includes a content name indicating whether the first interest packet exists in the first PIT before the modification; the processing unit determines The transmission path for transmitting the data packet to the destination UAP includes: determining the transmission path when the content name of the first interest packet does not exist in the first PIT before the feedback information is determined to be modified.

For the technical effects of the first MCC provided by the present application, refer to the technical effects of the foregoing first aspect or the implementation manner of the first aspect, and details are not described herein again.

The sixth aspect, the application provides a second MCC, including: a receiving unit, configured to receive forwarding information sent by the first MCC, and a processing unit, configured to send, to the second CR, the third information according to the forwarding information received by the receiving unit Modifying information, the third modification information is used by the second CR to modify the fifth PIT stored in the second CR, so that the second CR receives the received data of the first interest packet according to the modified fifth PIT. The packet is sent to the first CR or the second CGW, the first CR is controlled by the first MCC, and the second CR and the second CGW are controlled by the second MCC.

Optionally, the modified fifth PIT is used to instruct the second CR to send the received data packet of the first interest packet request to the second CGW, where the second MCC further includes a sending unit, where the sending unit is configured to The forwarding information is sent to the second CGW, where the fourth modification information is used by the second CGW to modify the sixth PIT stored in the second CGW, so that the second CGW, according to the modified sixth PIT, The received data packet of the first interest packet request is sent to the first CGW.

Optionally, the sending unit is further configured to send the fifth modification information to the original UAP according to the forwarding information, where the fifth modification information is used by the original UAP to modify the second PIT, so that the original UAP receives the modified second PIT according to the modified second PIT. The first interest packet request packet is sent to the second CR.

Optionally, the receiving unit is further configured to receive the handover indication information that is sent by the first MCC, where the handover indication information includes the handover instruction and the user information of the UE, and the processing unit is further configured to determine, according to the user information, the original connection with the UE. And the sending unit is further configured to send the handover indication information to the original UAP, and the receiving unit is further configured to receive information about the first interest packet sent by the original UAP, where the first interest packet is sent to the original UAP by the UE. And the unsuccessful interest packet; the sending unit is further configured to send the interest packet information to the first MCC.

Optionally, the receiving, by the receiving unit, the forwarding information sent by the first MCC, specifically: receiving the disconnection information sent by the first MCC, where the disconnection information is used to indicate that the original UAP disconnects from the UE, where the disconnection information includes Transmitting information; the sending unit is further configured to send the disconnection information to the original UAP.

For the technical effects of the second MCC provided by the present application, refer to the technical effects of the foregoing second aspect or the implementation manner of the second aspect, and details are not described herein again.

In a seventh aspect, the application provides a destination UAP, including: a sending unit, configured to send, to the first mobility control center MCC, handover information when detecting that a signal strength of the user terminal UE is greater than or equal to a preset threshold. The switching information is used to request to switch the UE to the destination UAP, and the destination UAP is controlled by the first MCC. The receiving unit is configured to receive the interest packet information sent by the first MCC, where the interest packet information includes the first interest packet. a content name and user information of the UE, the first interest packet is an interest packet sent by the UE to the original UAP connected to the UE and is not responded; and the processing unit is configured to receive the interest packet information according to the receiving unit Modifying the first pending interest table PIT stored in the storage unit, so that when the receiving unit receives the data packet requested by the first interest packet, the sending unit changes the data according to the first PIT modified by the processing unit. The packet is sent to the UE.

Optionally, after the destination UAP modifies the first PIT stored in the destination UAP according to the information of the first interest packet, the method further includes: the destination UAP sending feedback information to the first MCC, where the feedback information is used to indicate Whether the content name of the first interest package exists in the first PIT before the modification, and whether the data packet is cached in the destination UAP.

For the technical effects of the UAPs provided by the present application, refer to the technical effects of the foregoing third aspect or the implementation manners of the third aspect, and details are not described herein again.

In an eighth aspect, the application provides an original UAP, including: a receiving unit, configured to receive handover information sent by a mobile control center MCC that controls the original UAP, where the handover information includes a handover instruction and user information of the user terminal UE, the handover The information is used to request to switch the UE to the destination UAP, where the original UAP is the UAP currently connected to the UE, and the processing unit is configured to query the second pending interest table stored in the original UAP according to the handover instruction received by the receiving unit. a PIT, determining a content name of the first interest packet corresponding to the user information received by the receiving unit, where the first interest packet is an interest packet sent by the UE to the original UAP and is not responded; the sending unit is configured to send The MCC sends the information of the first interest package determined by the processing unit, where the information of the first interest package includes a content name of the first interest package and the user information.

Optionally, the second PIT includes a second local PIT and a second user pending interest table U-PIT, where the second local PIT is used to record a correspondence between a content name of the interest packet that is not responded to by the original UAP and a transmission port, The second U-PIT is configured to record a correspondence between the user information and the content name of the interest packet that the original UAP does not respond to; the processing unit queries the second pending interest table PIT stored in the original UAP according to the switching instruction, and determines The content name of the first interest packet corresponding to the user information includes: searching, in the second U-PIT, a content name of an unresponsive interest packet corresponding to the user information of the UE; determining the second local PIT There is a content name of the unresponsive interest packet corresponding to the user information of the UE, and the original UAP determines that the content name of the unresponsive interest packet corresponding to the user information of the UE is the content name of the first interest package.

Optionally, the receiving unit is further configured to receive the disconnection information sent by the MCC, where the processing unit is further configured to disconnect the connection with the UE according to the disconnection information.

Optionally, the disconnecting information received by the receiving unit further includes forwarding information, where the processing unit is further configured to modify the second PIT according to the forwarding information, so that the receiving unit receives the first interest packet request. At the time of the data packet, the transmitting unit transmits the data packet to the destination UAP or the content router CR according to the modified second PIT, and the CR is located on a transmission path for transmitting the data packet to the destination UAP.

For the technical effects of the original UAP provided by the present application, refer to the technical effects of the foregoing fourth aspect or the implementation manner of the fourth aspect, and details are not described herein again.

In a ninth aspect, the present application further provides a first MCC, including: a processor, a memory, and a communication interface; the memory is configured to store a computer execution instruction; the communication interface is configured to receive information, switching information of the first interest packet And feedback indication information, and sending disconnection indication information, interest package information, etc.; the processor is connected to the memory and the communication interface through the bus, and when the first MCC is running, the processor executes the computer stored in the memory The instructions are executed to implement the method of UE handover as described in the first aspect and various implementations of the first aspect.

In a tenth aspect, the present application further provides a second MCC, including: a processor, a memory, and a communication interface; the memory is configured to store a computer execution instruction; the communication interface is configured to receive and send information of the first interest package, Interest packet information, handover indication information, feedback indication information, disconnection information, etc.; the processor is connected to the memory and the communication interface through the bus, and when the second MCC is running, the processor executes the computer stored in the memory The instructions are executed to implement the method of UE handover as described in the second aspect and various implementations of the second aspect.

In an eleventh aspect, the application provides a UAP, a processor, a memory, and a transceiver; the memory is configured to store a computer to execute an instruction; the transceiver is configured to receive a data packet, an interest packet information, and send the switching information, and the feedback indication Information, etc.; the processor is connected to the memory and the transceiver through the bus, and when the destination UAP is running, the processor executes a computer execution instruction stored in the memory to implement various aspects of the third aspect and the third aspect A method of UE handover as described in the implementation manner.

In a twelfth aspect, the present application further provides an original UAP, including: a processor, a memory, and a transceiver; the memory is configured to store a computer to execute an instruction; the transceiver is configured to send the information packet of the interest packet, the first interest packet, and Receiving switching indication information, disconnecting information, etc.; the processor is connected to the memory and the transceiver through the bus, and when the original UAP is running, the processor executes a computer execution instruction stored in the memory to implement the fourth aspect And a method of UE handover as described in each implementation manner of the fourth aspect.

In a thirteenth aspect, the present application further provides a computer storage medium, wherein the computer storage medium stores instructions, when executed on a computer, causing the computer to perform the first aspect, the second aspect, and the third aspect. Method or method of the fourth aspect.

In a fourteenth aspect, the present application also provides a computer program product comprising instructions, when executed on a computer, causing the computer to perform the method of the first aspect, the second aspect, the third aspect or the fourth aspect .

The fifteenth aspect, the application provides a communication system, comprising: the first MCC according to any of the fifth aspect or the fifth aspect, and the optional one of the seventh aspect, the seventh aspect The target UAP according to any one of the eighth aspect or the eighth aspect, the first MCC according to any one of the ninth aspect or the ninth aspect, and the seventh aspect, the seventh Any one of the optional aspects, the eighth aspect, or the optional UAP of any one of the eighth aspects; the first MCC according to any one of the fifth aspect or the fifth aspect, The object of any of the seventh aspect, the eighth aspect, or the optional UAP of the eighth aspect, and the eighth aspect, the optional aspect of the eighth aspect, the twelfth The first UC according to any one of the ninth or the ninth aspect, the seventh aspect, the seventh aspect, the seventh aspect Optionally, the target UAP according to any one of the eighth aspect or the eighth aspect, and the eighth aspect, The primary UAP of any one of the optional aspects of any one of the eight or the second aspect, or the first one of the fifth aspect or the fifth aspect of the fifth aspect The seventh aspect, the eighth aspect, the eighth aspect, or the optional UAP according to any one of the eighth aspects, the eighth aspect, the eighth aspect, the optional The original UAP according to any one of the twelfth aspect or the twelfth aspect, and the sixth aspect, the optional aspect of any of the sixth aspect, the tenth aspect, or the optional aspect of the tenth aspect The second MCC, the first MCC according to any one of the ninth aspect or the ninth aspect, the seventh aspect, the optional aspect of the seventh aspect, the eighth aspect or the eighth aspect An optional UAP, the eighth aspect, the optional aspect of any of the eighth aspect, the second aspect, or the optional UAP of the twelfth aspect, and the sixth aspect, The second MCC of any of the optional aspects of the sixth aspect, the tenth aspect or the optional aspect of the tenth aspect.

DRAWINGS

1 is a schematic diagram of an NDN topology in the prior art;

2 is a schematic diagram of a communication system provided by the present application;

FIG. 3 is a schematic structural diagram 1 of an MCC provided by the present application; FIG.

4 is a schematic structural diagram 1 of a UAP provided by the present application;

FIG. 5 is a schematic structural diagram of a CR provided by the present application; FIG.

6 is a schematic structural diagram of a CGW provided by the present application;

FIG. 7 is a schematic structural diagram of a UE according to the present application;

FIG. 8 is a flowchart 1 of an embodiment of a method for UE handover according to the present application;

FIG. 9 is a second flowchart of an embodiment of a method for UE handover according to the present application;

FIG. 10 is a flowchart 3 of an embodiment of a method for UE handover according to the present application;

FIG. 11 is a flowchart 4 of an embodiment of a method for UE handover according to the present application;

FIG. 12 is a flowchart 5 of an embodiment of a method for UE handover according to the present application;

FIG. 13A is a schematic structural diagram 2 of an MCC provided by the present application; FIG.

FIG. 13B is a schematic structural diagram 3 of an MCC provided by the present application; FIG.

13C is a schematic structural view 4 of an MCC provided by the present application;

FIG. 14A is a schematic structural diagram 2 of a UAP provided by the present application; FIG.

FIG. 14B is a schematic structural diagram 3 of a UAP provided by the present application; FIG.

FIG. 14C is a schematic structural diagram 4 of a UAP provided by the present application.

Detailed ways

The method for UE handover provided by the present application is applicable to a naming data mobile network (NDMN). Based on the traditional NDN, the NDMN proposed in this application adds a mobility control center (MCC) with functions of information processing, information storage, topology management, and mobility control management. In the present application, a distributed network topology can be employed. For example, an NDMN can include multiple domains, with network elements within each domain being controlled by one MCC. The network element in each domain may include a user attachment point (UAP), a content gate-way (CGW), a content router (CR), a UE, and the like. Each MCC can be connected (ie, directly communicating) to an MCC in an adjacent domain, or each MCC connected to the central MCC can be controlled by a central MCC in the network.

Illustratively, as shown in FIG. 2, a communication system provided by the present application. The system includes at least one central MCC, a plurality of CRs, and at least one Internet (Internet) server. The central MCC is connected to the MCC in each domain, and the MCC in each domain is responsible for controlling each network element in the domain. Exemplarily, as shown in FIG. 2, in domain 1, at least two UEs, two CRs, one other type of router (for example, a router that does not have a content caching function), two UAPs, and one CGW are included. The CGW is connected to the Internet server as the content exit/entry of the domain 1, and is connected to the CGW in the domain 2 through CR1 in the network. The two UAPs are connected to each other, can communicate, and are connected to the CGW through two CRs in the domain 1 and one other type of router to implement data interaction with the Internet server or other domains. The two UAPs provide access services for the UEs connected to them. The MCC is connected to CR, UAP, other types of routers, and CGW in Domain 1.

Among them, MCC is mainly responsible for information processing, information storage, topology management and mobile control management. The information processing includes processing user information, determining information of a UAP that establishes a connection with the user, and information of the MCC. The information storage includes information for storing network elements such as a UE, a CR, a CGW, and a UAP. Topology management includes topology calculation and transmission path calculation. The mobile control management includes the control of each network element, including the UE handover, according to the information of the user, the information of the UAP, the information of the MCC, the topology calculation, the calculation result of the transmission path, and the information carried in the different signaling and signaling. Modify the PIT in each network element. The MCC can be a server, server cluster, or computer system with the above functions.

CR is mainly responsible for data forwarding and has content caching. CR can be a router with content caching.

UAP mainly provides access services for UEs and has content caching. The UAP may be a base station (BS) or a base transceiver station (BTS) having a content caching function. In systems using different radio access technologies, the names of devices with base station functions may be different, for example, in an LTE network, called an evolved NodeB (eNB or eNodeB), in the third generation. In a communication (3G) network, it is called a Node B, or an access device in a fifth generation communication (5G), and the like.

The CGW can serve as the content out/entry of each domain, and the content of other domains can enter the domain where the CGW is located through the CGW.

The Internet server serves as a data source in the network, and delivers a data packet corresponding to the content name based on the interest packet sent by each network element.

Content router (CR), mainly responsible for data forwarding, with content caching.

The UE involved in the present application may include various handheld devices with wireless communication functions, in-vehicle devices, wearable devices, computing devices, smart phones, smart watches, tablets or other processing devices connected to wireless modems, and various Forms of terminal equipment, mobile stations (MS), terminals, and the like. For convenience of description, in the present application, the devices mentioned above are collectively referred to as UEs.

The network nodes UAP, CR, and CGW all have content caching capabilities. That is, the UAP, CR, and CGW support name routing, and the packet of the corresponding content name (also referred to as content) is requested through the interest packet. Each network node has three data packet structures: a content store (CS), a pending interest table (PIT), and a forwarding information base (FIB). The CS is used to store the cached content of each network node. The PIT is used to record the content name of the interest packet that the network node does not respond to, and a transmission port, which is the transmission port of the network node that receives the interest packet, that is, the source port of the interest packet. The FIB is used to record the next hop interface of the current node to the content providing node.

After a network node receives the interest packet, it first queries the CS to determine whether the corresponding data packet is cached in the CS. If the CS includes the data packet requested by the interest packet, the copy of the data packet is directly returned to the source port of the interest packet and the interest packet that has been responded is discarded. If the CS does not contain the data packet requested by the interest packet, the network node continues to query in the PIT. If the content name of the interest package is recorded in the PIT, it indicates that the network node has received the same interest packet before this time and has already forwarded it, but has not obtained the returned result. The network node needs to add the source port of the interest packet to the list of transmission ports corresponding to the content name, and discard the interest packet. If the content name is not recorded in the PIT, the network node looks up the FIB. If the content name is recorded in the FIB, the network node receives the interest packet for the first time, and then forwards the interest packet according to the FIB port list (except that the network node receives the transmission port of the interest packet), and A new correspondence between the content name and the transmission port is added to the PIT. When the network receives the data packet corresponding to the interest packet, it first searches in the CS according to the content name to determine whether the data packet already exists in the CS. If it exists, the packet is discarded. If it does not exist, find the corresponding content name in the PIT. If the content name exists, the data packet is sent to each transmission port corresponding to the content name recorded in the PIT, and the data packet is saved in the CS. If the PIT does not exist, the packet is discarded.

As shown in FIG. 3, an MCC provided by the present application includes a processor, a memory, a bus, and a communication interface. The bus connects the processor, the memory, and the communication interface, and implements data transfer between the processor, the memory, and the communication interface. For example, the processor receives a command from the communication interface through the bus, decrypts the received command, performs calculation or data processing according to the decrypted command, and implements processing user information, topology calculation, transmission path calculation, and the like. The memory can include program modules and data modules for storing computer instructions and caching data, such as kernels, middleware, application programming interfaces (APs), and applications. The program modules may be composed of software, firmware, hardware, or at least two of them. The signaling interface can be connected to other network elements by wired or wireless connection to implement control of other network elements.

As shown in FIG. 4, a UAP provided by the present application includes a remote radio unit (RRU), a baseband unit (BBU), and an antenna feeder system.

The RRU includes a digital intermediate frequency module, a transceiver module, a power amplifier, and a filtering module. The digital intermediate frequency module is used for modulation and demodulation of electromagnetic wave transmission signals, digital up-conversion, A/D conversion, etc., the transceiver module completes the conversion of the intermediate frequency signal to the radio frequency signal; and then transmits the radio frequency signal through the antenna port through the power amplifier and the filtering module. Go out. The BBU is used to complete functions such as channel codec, baseband signal modulation and demodulation, protocol processing, and the like, and provides interface functions with the upper layer network element, and completes the processing process of the physical layer core technology, such as code division multiple access in 3G. Division multiple access (CDMA) and orthogonal frequency division multiplexing (OFDM)/multiple-input multiple-output (MIMO) processing in LTE. The antenna feeder system mainly includes an antenna, and may further include a coupler, a division of labor, and the like for transmitting data between other network elements (such as UE, CR, MCC, etc.) and the RRU.

As shown in FIG. 5, a CR provided by the present application includes: a main control board, a bus, a plurality of interface boards, and a switching network board.

Among them, the main control board is responsible for system management control, system clock and system maintenance. The main control board is connected to the interface board and the switching network board through the bus through the system bus. The switching network board is responsible for packet forwarding according to the received packets of the stored routing table, and implements forwarding of IP packets, protocol packets, and data packet packets between the interface board and the interface board. The interface board provides an input and output port for the CR, and receives and transmits data based on a routing table stored in the CR.

As shown in FIG. 6, a CGW provided for the application includes: a processor, a network interface, and a memory.

Wherein, the processor is a control center of the CGW, and each part of the entire CGW is connected by using various interfaces and lines, and each of the CGWs is executed by running or executing computer program code stored in the memory and calling data stored in the memory. The function and processing of the data to monitor the CGW as a whole. The processor may include digital signal processor devices, microprocessor devices, analog to digital converters, digital to analog converters, etc., which are capable of distributing the control and signal processing functions of the CGW according to their respective capabilities. The network interface can be used to send and receive information and process the received information to the processor.

As shown in FIG. 7, a UE provided by the present application includes a processor, a memory, an RF circuit, and the like.

Wherein, the processor is a control center of the UE device, and connects various parts of the entire UE device by using various interfaces and lines, by running or executing software programs and/or modules stored in the memory, and calling data stored in the memory. Performing various functions and processing data of the UE device to perform overall monitoring on the UE device. The RF circuit can be used to send and receive information and process the received information to the processor. Typically, RF circuits include, but are not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier (LNA), a duplexer, etc., communicating with other devices over a network via wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to a global system of mobile communication (GSM), a general packet radio service (GPRS), a CDMA, a wideband code division. Wideband code division multiple access (WCDMA), LTE, Wi-Fi or low-power Wi-Fi, and WLAN technology.

Based on the NDMN provided in this application, as shown in FIG. 8 , a flowchart of an embodiment of a UE handover method provided by the present application includes the following steps:

Step 801: When the destination UAP detects that the signal strength of the UE is greater than or equal to a preset threshold, the destination UAP sends the handover information to the first MCC.

In the present application, the UAP can detect the signal strength of each UE that is not connected to it. When the signal strength of a UE is greater than or equal to a preset threshold, the UAP may determine that the UE needs to be handed over from the original UAP currently connected to the UE to the UAP, so that the UAP provides services for the UE. Then, the UAP can serve as the destination UAP of the UE, and send handover information to the first MCC that controls the UAP of the destination, to request that the UE be handed over to the destination UAP.

The handover information may include a handover instruction for indicating handover, and user information for indicating the UE. The destination UAP may send the handover information by using the same message, or may separately send the handover instruction and the user information in the handover information by using a separate message.

Step 802: The first MCC acquires information about the first interest packet according to the handover information.

After receiving the handover information, the first MCC determines that the UE needs to switch, and then acquires information about the first interest packet corresponding to the user information of the UE. The first interest packet is an interest packet that the UE has sent to the original UAP and is not responding. The information of the first interest package may include the content name of all (one or more) first interest packages and the user information of the UE. Through the information of the first interest packet, it can be known that the UE has an interest packet that has been sent but has not been responded to.

The interest packet that is not responded refers to the interest packet that the original UAP has not received the corresponding data packet and sent to the UE.

Step 803: The first MCC sends the interest packet information to the destination UAP.

The interest package information includes a content name of the first interest package and user information of the UE. It should be noted that the interest packet information may be the information of the first interest packet, and the first MCC may also process the first interest packet to obtain the interest packet.

Step 804: The destination UAP modifies the first PIT stored in the destination UAP according to the interest packet information, so that the destination UAP receives the data packet requested by the first interest packet according to the modified first PIT. The data packet is sent to the UE.

For example, after receiving the interest packet information, the destination UAP can view whether the content name of each first interest packet carried in the interest packet information is recorded in the first PIT stored in the destination UAP. For each first interest packet, if the content name of the first interest packet is not recorded in the first PIT, the destination UAP may first check whether the cached information of the first interest packet is cached in the CS stored in the destination UAP. A packet (ie, a packet corresponding to the content name of the first interest package). If there is a cache, the data packet can be directly sent to the UE through the first transmission port on the destination UAP. The first transmission port is a transmission port that establishes a connection between the UAP and the UE, and the destination UAP performs data transmission with the UE through the first transmission port.

If the data packet is not cached in the CS, the destination UAP adds the content name of the first interest packet to the first transmission port in the first PIT. If the content name of the first interest packet is recorded in the first PIT, check whether the number of the first transmission port is included in the transmission port record corresponding to the content name of the first interest packet. If not included, the number of the first transmission port is added to the transmission port record. Then, according to the modified first PIT, when the destination UAP receives the data packet requested by the first interest packet, the destination UAP may send the data packet to the UE through the first transmission port.

In one example, the first PIT stored in the destination UAP may include a first local PIT and a first U-PIT. The first local PIT is used to record the correspondence between the content name of the interest packet that is not responded to by the destination UAP and the transmission port, and the first U-PIT is used to record the content of the user information and the interest packet that the destination UAP does not respond to. The correspondence between names.

Exemplarily, assume that the first local PIT is as shown in Table 1:

Table 1

内容名Content name	传输端口Transmission port
Test/video/file1/v2/s2Test/video/file1/v2/s2	0，10,1
Test/video/file2/v1/s2Test/video/file2/v1/s2	00

In Table 1, the transmission port corresponding to the interest packet whose content name is "Test/video/file1/v2/s2" is the transmission port "0" and the transmission port "1". It means that when the destination UAP receives the data packet with the content name “Test/video/file1/v2/s2”, it sends the data packet to the corresponding UE through the transmission port “0” and the transmission port “1”. The transmission port corresponding to the interest packet whose content name is "Test/video/file2/v1/s2" is "0". It means that when the destination UAP receives the data packet with the content name “Test/video/file2/v1/s2”, it sends the data packet to the corresponding UE through the transmission port “0”.

Assume that the first U-PIT is as shown in Table 2:

Table 2

In Table 2, the UE whose user information is "FO89E0343123" has two uninterested interest packets, namely the content name "Test/video/file1/v2/s2" and "Test/video/file2/v1/s2". "The interest package. The UE whose user information is "A02344B343CF" has an unresponsive interest packet, which is an interest packet whose content name is "Test/video/file2/v1/s2".

It is assumed that the interest package information includes content names of two first interest packages, namely "Test/video/file2/v2/s2" and "Test/video/file2/v1/s2", and also includes user information "B01564B563ZF". The UE indicating that the user information is "B01564B563ZF" has two interest packets that have been sent to the original UAP but are not responding, and the contents of the two interest packages are respectively "Test/video/file2/v2/s2" and "Test/" Video/file2/v1/s2”.

After the destination UAP receives the interest packet information, the destination UAP needs to modify the first local PIT and the first U-PIT. For the first local PIT, when the destination UAP determines that the content name "Test/video/file2/v1/s2" exists in the first local PIT, the first transmission port (assuming a transmission port) that establishes a connection with the UE can be established. The number of 3") is added to the transmission port record corresponding to the content name "Test/video/file2/v1/s2". When determining that the content name "Test/video/file2/v2/s2" does not exist in the first local PIT, the destination UAP first checks whether the packet with the content name "Test/video/file2/v2/s2" is cached in the CS. If there is no cache, the destination UAP can add the correspondence between the content name "Test/video/file2/v2/s2" and the transmission port "3" to the first local PIT. Then the modified first local PIT can be as shown in Table 3 below.

table 3

内容名Content name	传输端口Transmission port
Test/video/file1/v2/s2Test/video/file1/v2/s2	0，10,1
Test/video/file2/v1/s2Test/video/file2/v1/s2	0，30,3
Test/video/file2/v2/s2Test/video/file2/v2/s2	33

For the first U-PIT, the destination UAP can directly add the correspondence between the content name "Test/video/file2/v2/s2" and "Test/video/file2/v1/s2" and the user information "B01564B563ZF" to the first In a U-PIT. Then the modified first U-PIT can be as shown in Table 4 below.

Table 4

When the destination UAP completes the modification of the first PIT, the destination UAP can complete the handover to the UE. In one example, the destination UAP may send a handover complete message to the first MCC to inform the first MCC that the destination UAP has completed the handover to the UE.

It is to be noted that, by using the UE handover method provided by the present application, after determining that the UE is switched, the first MCC acquires the content name of the first interest packet that the UE has requested but has not yet responded to, and then passes the interest packet. The information sends the content name of the first interest package and the user information to the destination UAP, and the destination UAP modifies its own PIT, so that the destination UAP can return the data packet to the data packet requested by the first interest packet. The UE does not need the UE to make a second request for the first interest packet. Therefore, the number of request transmissions and the waiting delay are reduced, thereby improving the data request efficiency of the UE during the handover process.

In an example, if the destination UAP does not request the data packet of the first interest packet request from the data source before receiving the information of the first interest packet, that is, the data source and the destination UAP are not formed to transmit the data. The transmission path of the packet. Then, in order to ensure that the UAP can receive the data packet, the network side device may further determine the transmission path after transmitting the interest packet information to the destination UAP, and modify the PIT of each network element on the transmission path to make the data packet. Can be transferred to the destination UAP. Then, based on FIG. 8, as shown in FIG. 9, after the above step 803, the method further includes:

Step 805: The first MCC determines a transmission path for transmitting the data packet to the destination UAP.

Exemplarily, the first MCC may determine a data source that is closest to the destination UAP according to a preset network topology, and determine a transmission path for transmitting the data packet from the data source to the destination UAP. Alternatively, the first MCC may also determine, according to the network topology, that there is a CR on the transmission path for transmitting the data packet to the original UAP, and the CR can be directly or indirectly connected to the destination UAP and is closest to the destination UAP, then The first MCC may determine a transmission path for transmitting the data packet from the CR to the destination UAP according to a network topology. Alternatively, when the original UAP and the destination UAP are not in the same domain, the first MCC may directly determine, according to the network topology, that the data packet is transmitted from the egress CR of the domain (that is, the CR connected to the CR or CGW in other domains) to the destination. UAP transmission path.

Step 806: The first MCC sends first modification information to the first CR on the transmission path.

It can be understood that the CR on the transmission path is the first CR, that is, there may be multiple first CRs on the transmission path, and there may be a first CR. The first modification information received by each first CR may include a correspondence between a content name of the first interest packet and identification information of the receiving object. The receiving object refers to an object that receives the data packet sent by the first CR on the transmission path.

For example, if the destination UAP on the transmission path receives the data packet from the first CR1, the destination UAP is the receiving object of the first CR2, and the first modification information received by the first CR1 may include the content name and destination of the first interest packet. Correspondence between UAP identification information. The first CR1 on the transmission path receives the data packet from the first CR2, then the first CR1 is the receiving object of the first CR2, and the first modification information received by the first CR2 may include the content name and the first content of the first interest packet. The correspondence between the identification information of a CR1.

Step 807: The first CR modifies the third PIT according to the first modification information.

Exemplarily, in combination with the example in step 806, after receiving the first modification information, the first CR1 may check whether the content name of the first interest package carried in the first modification information is recorded in the third PIT. If the content name of the first interest packet is not recorded, the first CR1 may check whether there is a cached data packet requested by the first interest packet in the CS stored in the first CR1. If there is a cache, the packet can be directly sent to the destination UAP through the transmission port "1" on the first CR1 (assuming that the transmission port "1" of the first CR1 is the transmission port connected to the destination UAP). If the data packet is not cached in the CS, the first CR1 adds a correspondence between the content name of the first interest packet and the transmission port "1" in the third PIT. If the content name of the first interest packet is recorded in the third PIT, it is checked whether the transmission port "1" is included in the transmission port record corresponding to the content name of the first interest packet. If not, add the transport port "1" to the transport port record. Then, according to the modified third PIT, when receiving the data packet requested by the first interest packet, the first CR1 may send the data packet to the UE through the transmission port “1”. If the transmission port record includes the transmission port "1" corresponding to the content name of the first interest packet, the first CR1 does not need to modify the third PIT.

It can be understood that the manner in which the other first CRs on the transmission path modifies the third PIT of the first CR1 can be modified by referring to the manner in which the first CR1 modifies the third PIT stored in the first CR1. After receiving the data packet requested by the first interest packet, each first CR can directly or indirectly send the data packet to the destination UAP according to the modified third PIT. The indirect sending of the data packet to the destination UAP refers to forwarding the other first CR to the destination UAP through the destination UAP. For example, after receiving the data packet, the second CR2 sends the data packet to the destination UAP by forwarding the first CR1.

It should be noted that, in a possible design, the foregoing steps 805-806 may be performed after the first MCC obtains the information of the first interest packet. For example, as shown in FIG. 9, after the first MCC sends the interest packet information to the destination UAP, the first MCC can directly execute 805-806 regardless of whether a corresponding transmission path already exists.

In another possible design, the first MCC may also determine whether to determine the transmission path and modify the data packet based on whether the destination UAP is waiting for the data packet requested by the first interest packet before receiving the information of the first interest packet. The PIT of each network element on the transmission path. It can be understood that if the destination UAP modifies the first PIT according to the interest packet information, the content name of the first interest packet exists in the first PIT, indicating that the destination UAP is waiting for the arrival of the data packet. That is, a transmission path for transmitting the data packet to the destination UAP has been established or is being established. If the destination UAP does not have the content name of the first interest packet in the first PIT before the first PIT is modified according to the interest packet information, and the data packet is not cached in the CS of the destination UAP, the destination UAP is not currently available. The service requesting the packet, that is, there is no established transmission path. Then, based on FIG. 9, as shown in FIG. 10, after the above step 804, the method further includes:

Step 808: The destination UAP sends feedback information to the first MCC.

The feedback information is used to indicate whether the content name of the first interest packet exists in the first PIT before the modification, and whether the corresponding data packet is cached in the destination UAP. The feedback information may be sent to the first MCC through separate information, or may be carried in the handover complete message and sent to the first MCC.

Based on the possible design, the foregoing step 805 may specifically include:

Step 805a: The first MCC determines the content path when the content information of the first interest packet does not exist in the first PIT before the feedback information indicates that the modification is performed, and the data path is not cached in the destination UAP.

In this possible design, the process of topology calculation and path calculation by the first MCC without determining the transmission path is avoided, thereby improving the switching efficiency.

The method for UE handover provided by the present application is further described below in combination with two possible scenarios.

In scenario 1, the UE switches in one domain. That is, the original UAP and the destination UAP are in the same domain, and are controlled by the first MCC. FIG. 11 is a flowchart of another embodiment of a method for transmitting a UE handover according to the present disclosure.

Step 1101: When the destination UAP detects that the signal strength of the UE is greater than or equal to a preset threshold, the destination UAP sends handover information to the first MCC, where the handover information includes a handover instruction and user information of the UE.

Step 1102: The first MCC determines the original UAP according to user information.

In the present application, information of each UAP controlled by it is stored in advance in the first MCC. For example, when the UAP establishes a connection with a UE, the UAP sends a connection status of the UAP to the first MCC, and the first MCC records the connection. Therefore, the first MCC can query, by using the user information of the UE, which UAP connection the UE controls with the first MCC.

That is, in the present application, when the UE performs intra-domain handover, the first MCC can determine which UAP is the original UAP currently serving the UE according to the user information of the UE.

Step 1103: The first MCC sends handover indication information to the original UAP, where the handover indication information includes a handover instruction and user information.

It should be noted that, after receiving the handover information, the first MCC may directly send the handover information as the handover indication information to the original UAP. The switching information may also be processed to obtain switching indication information, and then sent to the original UAP.

Step 1104: The original UAP queries the second PIT stored in the original UAP according to the handover instruction, and determines the content name of the first interest packet corresponding to the user information.

In the present application, the original UAP may perform a lookup operation of the content name of the unresponsive interest packet upon receiving the handover instruction. That is, the original UAP queries the second PIT for the content name of the first interest packet corresponding to the user information according to the instruction of the handover instruction.

In one example, the second PIT may be a second U-PIT stored in the original UAP, and the second U-PIT is used to record a correspondence between the user information and the content name of the interest packet that the original UAP did not respond to. That is, the content name of the interest packet that each UE that is currently connected to the original UAP has sent to the original UAP but has not yet responded to is recorded in the second U-PIT. The original UAP can directly search for the content name of the interest package corresponding to the user information through the second U-PIT as the content name of the first interest package.

In another example, the second PIT can include a second local PIT and a second U-PIT. The second local PIT is used to record the correspondence between the content name of the interest packet that the original UAP does not respond to and the transmission port.

Then, when the original UAP queries the second PIT to determine the content name of the first interest packet corresponding to the user information, the original UAP may first search for the unresponsive interest packet corresponding to the user information of the UE in the second U-PIT. a content name; determining whether there is a content name of the unresponsive interest packet corresponding to the user information of the UE in the second local PIT; if yes, determining that the unresponsive interest packet corresponding to the user information of the UE is the First interest package.

It can be understood that, because the original UAP forwards the received data packet according to the second local PIT, in the process that the original UAP unresponsive interest packet is responded one by one, the second local PIT is compared to the second U-PIT. The content can be updated more timely. Therefore, by the scheme of jointly determining the content name of the first interest package by the second local PITT and the second U-PIT, it is possible to obtain more accurate information of the first interest package.

Step 1105: The original UAP sends the information of the first interest packet to the MCC.

In this example, in the above steps 1102-1105, the first MCC may obtain the information of the first interest packet from the original UAP by directly transmitting the handover information to the original UAP.

Step 1106: The first MCC sends the interest packet information to the destination UAP.

Step 1107: The destination UAP modifies the first PIT according to the interest packet information.

For the specific implementation process of the steps 1106-1107, refer to the specific implementation process of the foregoing steps 803-804, which are not described herein.

Step 1108: The destination UAP sends a handover complete message to the first MCC.

The handover complete message is used to notify the first MCC that the destination UAP has completed handover to the UE. In an optional design, the handover completion message may also carry feedback information. For the description of the feedback information, refer to the description in the above step 808, and details are not described herein.

Step 1109, the first MCC determines a transmission path for transmitting the data packet to the destination UAP.

Based on scenario 1, it is assumed that there is a CR in the domain, and the CR is the first CR, and is connected to both the original UAP and the destination UAP. It can be understood that, when the original UAP receives the first interest packet and requests the data source for the data requested by the first interest packet, the original UAP sends the first interest packet to the first CR, and the first CR is used by the first CR. Interest packets are forwarded. Then, the first CR receives the corresponding data packet and caches after the data source responds to the first interest packet. Then, the first MCC determines that the transmission path for transmitting the data packet to the destination UAP is the transmission path from the first CR to the destination UAP.

Step 1110: The first MCC sends first modification information to the first CR on the transmission path.

Step 1111: The first CR modifies the third PIT according to the first modification information.

It should be noted that, based on the scenario 1, the foregoing steps 1108-1110 are optional steps, and the design manners of the steps 1108-1110 in this example may be specifically described in FIG. 9 and the description of the embodiment shown in FIG. I will not go into details here.

Optionally, after receiving the handover complete message, the first MCC may further indicate that the original UAP disconnects from the UE. For example, the method can also include:

In step 1112, the first MCC sends the disconnection information to the original UAP.

The disconnection information may include a disconnection instruction for indicating disconnection, and user information for indicating the UE, by which the original UAP may determine to disconnect the UE. The original UAP may send the disconnection information through the same message, or may separately send the disconnection command and the user information in the disconnection information through separate messages.

In step 1113, the original UAP disconnects the connection with the UE according to the disconnection information.

It can be understood that after the original UAP disconnects the connection with the UE, a release message may also be sent to the first MCC, so that the first MCC releases the communication established for the current handover procedure. At this point, the UE completes the handover.

In one possible design, the disconnection information may also include forwarding information. Based on the scenario 1, the forwarding information may include the identifier information of the destination UAP and the content name of the first interest packet, or the identifier information of the first CR and the content name of the first interest packet. The original UAP can modify the second PIT according to the forwarding information. For the modification process of the second PIT by the original UAP, refer to the modification process of the first PIT by the destination UAP, which is not described here.

It can be understood that, after the original UAP modifies the second PIT according to the forwarding information, when the original UAP receives the data packet requested by the first interest packet, the original UAP can directly send the data packet to the modified second PIT to the data packet. The destination UAP, or the data packet is sent to the first CR, and forwarded by the first CR to the destination UAP. The data packet is finally sent by the destination UAP to the UE.

It is worth noting that, based on this design, when the data packet arrives at the original UAP, even if the UE has a handover, the first MCC instructs the original UAP to modify the second PIT by forwarding the information, so that the original UAP can smoothly return the data packet to the UE. It avoids the data interruption of the UE during the handover process and realizes seamless handover.

In scenario 2, the UE switches between the two domains. That is, the original UAP is controlled by the second MCC, and the destination UAP is controlled by the first MCC. Based on scenario 2, as shown in FIG. 12, a flowchart of another embodiment of a method for transmitting a UE handover provided by the present application is as follows:

Step 1201: When the destination UAP detects that the signal strength of the UE is greater than or equal to a preset threshold, the destination UAP sends the handover information to the first MCC.

Step 1202: The first MCC determines the second MCC according to the user information in the handover information.

In the present application, information of each of the second MCCs connected thereto is stored in advance in the first MCC. For example, information exchange between the interconnected MCCs informs each other which UEs are connected to the MCC controlled domain. Therefore, the first MCC can query, by using the user information of the UE, the UE to access the domain controlled by the second MCC to which the first MCC is connected.

That is, in the present application, when the UE performs cross-domain handover, the first MCC can determine the second MCC according to the user information of the UE.

Step 1203: The first MCC sends handover indication information to the second MCC.

Step 1204: The second MCC determines the original UAP according to the user information in the handover indication information.

Step 1205: The second MCC sends the handover indication information to the original UAP.

Step 1206: The original UAP queries the second PIT stored in the original UAP according to the handover instruction, and determines the content name of the first interest packet corresponding to the user information.

Step 1207: The original UAP sends the information of the first interest packet to the second MCC.

Step 1208: The second MCC sends the information of the first interest packet to the first MCC.

It can be understood that the user information is carried in both the handover indication information received by the second MCC and the information of the first interest packet. Therefore, after receiving the information of the first interest packet, the second MCC may determine that the information of the first interest packet needs to be sent to the first MCC by comparing the user information (that is, the user who sent the information with the first interest packet) The information is the same as the MCC of the handover indication information.

In this example, in the above steps 1202-1208, it is described that the first MCC sends handover indication information to the original UAP via the second MCC to acquire the information procedure of the first interest packet from the original UAP. For the cross-domain handover of the UE, if the first MCC cannot directly determine the original UAP, the original UAP can be instructed to perform related operations by controlling the second MCC of the original UAP.

Step 1209: The first MCC sends the interest packet information to the destination UAP.

Step 1210: The destination UAP modifies the first PIT according to the interest packet information.

For the specific implementation process of the steps 1209-1210, refer to the specific implementation process of the foregoing steps 803-804, which are not described herein.

Step 1211: The destination UAP sends a handover complete message to the first MCC.

Step 1212: The first MCC determines a transmission path for transmitting the data packet to the destination UAP.

Step 1213: The first MCC sends first modification information to the first CR on the transmission path.

Step 1214: The first CR modifies the third PIT according to the first modification information.

Optionally, based on scenario 2, if the first CGW in the domain controlled by the first MCC has a caching function and a packet forwarding function, the first CGW is connected to the first CR as the domain egress/entry. Then, the first MCC may determine that the transmission path for transmitting the data packet to the destination UAP is a transmission path from the first CGW to the destination UAP through the first CR. Then, after the step 1212, the method may further include:

Step 1215: The first MCC sends second modification information to the first CGW on the transmission path.

Step 1216: The first CGW modifies the fourth PIT according to the second modification information.

The second modification information includes a content name of the first interest package and identification information of the first CR. For the manner in which the first CGW modifies the fourth PIT according to the second modification information, refer to the manner in which the first CR modifies the third PIT according to the first modification information, which is not described herein. According to the modified fourth PIT, when receiving the data packet requested by the first interest packet, the first CGW can forward the data packet to the first CR.

It should be noted that, based on the scenario 2, the foregoing steps 1212-1216 are optional steps, and the design manners of the steps 1212-1216 in this example may be specifically described in the embodiment shown in FIG. 9 and FIG. , not to repeat here.

In step 1217, the first MCC sends the disconnection information to the second MCC.

The disconnection information may include a disconnection instruction, user information, and forwarding information. Based on the scenario 2, the forwarding information may include the identifier information of the first CGW and the content name of the first interest packet, or the identifier information of the first CR and the content name of the first interest packet.

If the CR is the entry/exit of the domain, the forwarding information includes the identifier information of the first CR and the content name of the first interest packet, and after receiving the disconnection information, the second MCC may perform the following steps:

Step 1218: The second MCC sends third modification information to the second CR according to the forwarding information.

Step 1219: The second CR modifies the fifth PIT stored in the second CR according to the third modification information.

It can be understood that, when the CR is the entry/exit of the domain, the third modification information includes the identifier information of the first CR and the content name of the first interest packet. After the second CR modifies the fifth PIT according to the three modification information, when receiving the data of the first interest packet request, the second CR can send the data packet to the first CR according to the modified fifth PIT. The first CR sends the data packet to the destination UAP through the corresponding transmission path.

Optionally, if the CGW is the outbound/ingress of the domain, the forwarding information includes the identifier information of the first CGW and the content name of the first interest packet. After receiving the disconnection information, the second MCC may also modify the PIT of the second CGW controlled by the second MCC, as follows:

Step 1220: The second MCC sends fourth modification information to the second CGW according to the forwarding information.

Step 1221: The second CGW modifies the sixth PIT stored in the second CGW according to the fourth modification information.

When the CGW is the entry/exit of the domain, the fourth modification information includes the identifier information of the first CGW and the content name of the first interest packet. After the second CGW modifies the sixth PIT according to the fourth modification information, when receiving the data of the first interest packet request, the second CGW can send the data packet to the first CGW according to the modified sixth PIT. The first CGW sends the data packet to the destination UAP through the corresponding transmission path.

It can be understood that, if the CGW is the entry/exit of the domain, in the above step 1218, the third modification information includes the identifier information of the second CGW and the content name of the first interest packet. After the second CR modifies the fifth PIT according to the third modification information, according to the modified fifth PIT, the received data packet of the first interest packet request can be sent to the second CGW, so that the data packet is sent by the second CGW. Sending to the first CGW, the first CGW sends the data packet to the destination UAP through the corresponding transmission path.

In step 1222, the second MCC sends the disconnection information to the original UAP.

In step 1223, the original UAP disconnects the connection with the UE according to the disconnection information.

In a possible design, the disconnection information further carries the fifth modification information determined by the second MCC according to the forwarding information. The fifth modification information includes the identification information of the second CR and the content name of the first interest package. The original UAP modifies the second PIT according to the fifth modification information, so that the original UAP sends the received data packet of the first interest packet request to the second CR according to the modified second PIT. The data is forwarded by the second CR to the destination UAP through the corresponding transmission path to send the data packet to the UE through the destination UAP.

In scenario 2, based on the design, when the data packet arrives at the original UAP, even if the UE has a handover, the first MCC instructs the original UAP to modify the second PIT by forwarding the information, so that the original UAP can smoothly return the data packet to the UE. It avoids the data interruption of the UE during the handover process and realizes seamless handover.

In an example, if the first MCC cannot learn the second MCC according to the user information, the first MCC can implement information interaction with the second MCC and the original UAP through the central MCC. Exemplarily, when the first MCC needs to perform information interaction with the second MCC and the original UAP through the central MCC, the steps in the embodiment shown in FIG. 12 may be replaced as follows:

When the first MCC is performing steps 1202-1203, it can be replaced by the following steps:

In step 1202a, the first MCC sends handover indication information to the central MCC.

Step 1202b: The central MCC determines the second MCC according to the user information in the handover indication information.

In step 1203a, the central MCC sends handover indication information to the second MCC.

When the first MCC is performing step 1208, it can be replaced by the following steps:

In step 1208a, the second MCC sends the information of the first interest packet to the central MCC.

In step 1208b, the central MCC sends the information of the first interest packet to the first MCC.

It can be understood that the user information is included in the interest packet information, and the same user information is also included in the handover indication information sent by the first MCC received by the center MCC. Therefore, the center MCC determines that the information of the first interest packet needs to be sent to the first MCC by comparing the user information.

When the first MCC is performing step 1217, it can be replaced by the following steps:

In step 1217a, the first MCC sends disconnection information to the central MCC.

In step 1217b, the central MCC sends a disconnection message to the second MCC.

The disconnection information includes the user information, and the center MCC can determine the corresponding second MCC according to the user information, so as to send the disconnection information to the second MCC.

It can be seen from the above embodiment that, in the UE handover method provided by the present application, during the handover process, the first MCC acquires the content name of the first interest packet that the UE has requested but has not yet responded to, and then passes the interest. The packet information sends the content name of the first interest packet and the user information of the UE to the destination UAP, and is used to change the PIT of the destination UAP, so that the destination UAP can receive the data after receiving the data packet requested by the first interest packet. The packet is returned to the UE. There is no need for the UE to make a second request for the first interest packet. Therefore, the number of request transmissions and the waiting delay are reduced, thereby improving the data request efficiency of the UE during the handover process.

The foregoing provides a description of the solution provided by the present application from the perspective of interaction between the various network elements. It can be understood that each network element, such as UAP, MCC, etc., in order to implement the above functions, includes corresponding hardware structures and/or software modules for performing various functions. Those skilled in the art will readily appreciate that the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

The present application may divide a function module into a UAP, an MCC, or the like according to the above method example. For example, each function module may be divided according to each function, or two or more functions may be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the present application is schematic, and is only a logical function division, and may be further divided in actual implementation.

The present application may divide the functional modules of the UAP, the MCC, and the like according to the foregoing method examples. For example, each functional module may be divided according to each function, or two or more functions may be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the present application is schematic, and is only a logical function division, and may be further divided in actual implementation.

FIG. 13A shows a possible structural diagram of a UAP involved in the foregoing embodiment. The UAP includes a receiving unit 1301, a processing unit 1302, and a sending unit 1303. When the UAP is used as the original UAP, the receiving unit 1301 is configured to support the original UAP to perform steps 1103 and 1112 in FIG. 11, steps 1205 and 1222 in FIG. 12; the processing unit 1302 is configured to instruct the original UAP to perform steps 1104 and 1113, Steps 1206 and 1223 in FIG. 12; the transmitting unit 1303 is configured to instruct the original UAP to perform step 1105 and step 1207 in FIG. When the UAP is used as the destination UAP, the receiving unit 1301 is configured to support the destination UAP to perform step 803 in FIG. 8-10, step 1106 in FIG. 11, step 1209 in FIG. 12, and the processing unit 1302 is configured to support the destination UAP execution map. Step 804 in 8-10, step 1107 in FIG. 11, step 1210 in FIG. 12; the sending unit 1303 is configured to support the destination UAP to perform step 801 in FIG. 8-9, steps 801 and 803 in FIG. Steps 1101 and 1108 in Fig. 12, steps 1201 and 1211 in Fig. 12. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.

In the case of employing an integrated unit, FIG. 13B shows a possible structural diagram of the UAP involved in the above embodiment. The UAP includes a processing module 1311 and a communication module 1312. The processing module 1311 is configured to control and manage the action of the UAP. For example, when the UAP is used as the original UAP, the processing module 1311 is configured to support the original UAP to perform steps 1103-1105 and 1112-1113 in FIG. 11, 1205-1207 and 1222-1223 in FIG. 12, and/or for the description herein. Other processes of technology. When the UAP is used as the destination UAP, the processing module 1311 is configured to support the destination UAP to perform steps 801, 803, and 804 in FIG. 8-9, steps 801, 803, 804, and 808 in FIG. 10, and steps 1101 and 1106 in FIG. - 1108, steps 1201, 1209-1211 in Figure 12, and/or other processes for the techniques described herein. Communication module 1312 is for supporting communication of UAPs with other network entities, such as with the functional modules or network entities shown in FIG. 2. The UAP may further include a storage module 1313 for storing program codes and data of the UAP.

The processing module 1311 may be a processor or a controller, for example, may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (application-specific) Integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. The communication module 1312 can be a transceiver, a transceiver circuit, a communication interface, or the like. The storage module 1313 may be a memory.

When the processing module 1311 is a processor, the communication module 1312 is a transceiver, and the storage module 1313 is a memory, the UAP involved in the present application may be the UAP shown in FIG. 13C.

Referring to FIG. 13C, the UAP includes a processor 1321, a transceiver 1322, a memory 1323, and a bus 1324. The transceiver 1322, the processor 1321, and the memory 1323 are connected to each other through a bus 1324. The bus 1324 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. Wait. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 13C, but it does not mean that there is only one bus or one type of bus.

FIG. 14A shows a possible structural diagram of the MCC involved in the foregoing embodiment, and the MCC includes a transmitting unit 1401, a processing unit 1402, and a receiving unit 1403 in a case where the respective functional modules are divided by corresponding functions. When the MCC is used as the first MCC, the sending unit 1401 is configured to support the first MCC to perform step 803 in FIG. 8, steps 803 and 806 in FIG. 9-10, and steps 1103, 1106, 1110, and 1112 in FIG. Steps 1203, 1209, 1213, 1215, and 1217 in FIG. 12; processing unit 1402 is configured to support the first MCC to perform step 802 in FIG. 8, steps 802 and 805 in FIG. 9, steps 802 and 805a in FIG. Steps 1102 and 1109 in FIG. 11, steps 1202 and 1212 in FIG. 12; receiving unit 1403 is configured to support the first MCC to perform step 801 in FIGS. 8-9, steps 801 and 808 in FIG. 10, in FIG. Steps 1101, 1105, and 1108, steps 1201, 1208, and 1211 in FIG. When the MCC is used as the second MCC, the transmitting unit 1401 is configured to support the second MCC to perform steps 1205, 1208, 1218, 1220, and 1222 in FIG. 12; the processing unit 1402 is configured to support the second MCC to perform step 1204 in FIG. The receiving unit 1403 is configured to support the second MCC to perform steps 1203, 1207, and 1217 in FIG. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.

In the case of employing an integrated unit, FIG. 14B shows a possible structural diagram of the MCC involved in the above embodiment. The MCC includes a processing module 1411 and a communication module 1412. The processing module 1411 is configured to control and manage the actions of the MCC. For example, when the MCC is used as the first MCC, the processing module 1411 is configured to support the first MCC to perform the steps in FIG. 8 in steps 801-803 in FIG. 8, steps 801-803 and 805-807 in FIG. 9, FIG. Steps 801-803, 808, and 805a-807, steps 1101-1103, 1105-1106, 1108-1110, and 1112 in FIG. 11, steps 1201-1203, 1208-1209, 1211-1215, and 1217 in FIG. And/or other processes for the techniques described herein. When the MCC is used as the second MCC, the processing module 1411 is configured to support the second MCC to perform steps 1203-1205, 1207-1208, 1217-1218, 1220, and 1222 in FIG. 12, and/or for the techniques described herein. Other processes. Communication module 1412 is used to support communication of the MCC with other network entities, such as with the functional modules or network entities shown in FIG. 2. The MCC may also include a storage module 1413 for storing program code and data of the MCC.

The processing module 1411 may be a processor or a controller, such as a CPU, a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like. The communication module 1412 can be a transceiver, a transceiver circuit, a communication interface, or the like. The storage module 1413 can be a memory.

When the processing module 1411 is a processor, the communication module 1412 is a communication interface, and the storage module 1413 is a memory, the MCC involved in the present application may be the MCC shown in FIG. 14C.

Referring to FIG. 14C, the MCC includes a processor 1421, a communication interface 1422, a memory 1423, and a bus 1424. The communication interface 1422, the processor 1421, and the memory 1423 are connected to each other through a bus 1424. The bus 1424 may be a PCI bus or an EISA bus. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 14C, but it does not mean that there is only one bus or one type of bus.

The steps of a method or algorithm described in connection with the present disclosure may be implemented in a hardware or may be implemented by a processor executing software instructions. The software instructions may be composed of corresponding software modules, which may be stored in a random access memory (RAM), a flash memory, a read only memory (ROM), an erasable programmable read only memory ( Erasable programmable ROM (EPROM), electrically erasable programmable read only memory (EEPROM), registers, hard disk, removable hard disk, compact disk read only (CD-ROM) or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a core network interface device. Of course, the processor and the storage medium may also exist as discrete components in the core network interface device.

In a specific implementation, the present application further provides a computer storage medium, wherein the computer storage medium may store a program, and the program may include some or all of the steps in the embodiments of the UE handover method provided by the application. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The present application also provides a computer program product comprising instructions which, when executed on a computer, cause the computer to perform some or all of the steps of the various embodiments of the method of UE handover provided by the present application.

Those skilled in the art will clearly understand that the techniques in this application can be implemented by means of software plus the necessary general hardware platform. Based on such understanding, the technical solutions in the present application may be embodied in the form of software products in essence or in the form of software products, which may be stored in a storage medium such as ROM/RAM, magnetic Discs, optical discs, etc., include instructions for causing a computer device (which may be a personal computer, server, or VPN gateway, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.

The same and similar parts between the various embodiments in this specification can be referred to each other. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant points can be referred to the description in the method embodiment.

The embodiments of the invention described above are not intended to limit the scope of the invention.

Claims

A method for user terminal UE handover, which is characterized in that:

The first mobile control center MCC receives the handover information sent by the destination user attachment point UAP, where the handover information is used to request to switch the UE to the destination UAP, and the destination UAP is controlled by the first MCC;

Obtaining, by the first MCC, the information of the first interest packet according to the switching information, where the information of the first interest packet includes a content name of the first interest package and user information of the UE, where the first interest package is An interest packet sent by the UE to the original UAP connected to the UE and not responded;

Transmitting, by the first MCC, the interest package information to the destination UAP, where the interest package information includes a content name of the first interest package and the user information, where the interest package information is used by the destination UAP to modify the destination a first pending interest table PIT stored in the UAP, so that the UAP sends the data packet to the UE according to the modified first PIT after receiving the data packet requested by the first interest packet .
The method according to claim 1, wherein the handover information comprises the user information and a handover instruction, the original UAP is controlled by the first MCC, and the first MCC acquires the first information according to the handover information. Information about an interest package, including:

Determining, by the first MCC, the original UAP according to the user information;

The first MCC sends the handover indication information to the original UAP, where the handover indication information includes the handover instruction and the user information, so that the original UAP determines the user information according to the handover instruction. Corresponding information of the first interest package;

The first MCC receives information about the first interest packet sent by the original UAP.
The method according to claim 2, wherein after the first MCC sends the interest package information to the destination UAP, the method further includes:

The first MCC sends disconnection information to the original UAP, where the disconnection information is used to indicate that the original UAP disconnects from the UE.
The method according to claim 1, wherein the handover information comprises the user information and a handover instruction, the original UAP is controlled by a second MCC, and the first MCC acquires a first interest according to the handover information. Package information, including:

Determining, by the first MCC, the second MCC according to user information;

The first MCC sends the handover indication information to the original UAP via the second MCC, where the handover indication information includes the handover instruction and the user information, so that the original UAP is according to the handover instruction. Determining information of the first interest package corresponding to the user information;

The first MCC receives information of the first interest packet sent by the original UAP via the second MCC.
The method of claim 4, wherein the method further comprises:

The first MCC sends disconnection information to the original UAP via the second MCC, where the disconnection information is used to indicate that the original UAP disconnects from the UE.
The method according to claim 3 or 5, wherein the disconnection information further comprises forwarding information, the forwarding information being used by the original UAP to modify a second PIT stored in the original UAP.
The method of any of claims 1-6, further comprising:

Determining, by the first MCC, a transmission path for transmitting the data packet to the destination UAP;

Transmitting, by the first MCC, the first modification information to the first content router CR on the transmission path, where the first modification information is used to indicate that the first CR modifies the third PIT stored in the first CR, So that the first CR sends the received data packet to the destination UAP according to the modified third PIT.
The method according to claim 7, wherein the original UAP is controlled by a second MCC, and after the first MCC determines a transmission path for transmitting the data packet to the destination UAP, the method Also includes:

The first MCC sends the second modification information to the first content gateway CGW on the transmission path, where the second modification information is used to instruct the first CGW to modify the fourth PIT stored in the first CGW. So that the first CGW sends the received data packet to the first CR according to the modified fourth PIT.
The method according to claim 7 or 8, wherein after the first MCC sends the interest package information to the destination UAP, the method further includes:

The first MCC receives the feedback information sent by the destination UAP, where the feedback information is used to indicate whether the content name of the first interest packet exists in the first PIT before the modification, and whether the destination UAP is included in the destination Cache the data packet;

Determining, by the first MCC, a transmission path for transmitting the data packet to the destination UAP, including:

Determining, by the first MCC, that the content name of the first interest packet does not exist in the first PIT before the feedback information indicates that the modification is performed, and the data packet is not cached in the destination UAP. Transmission path.
A method for user terminal UE handover, characterized in that the method includes:

When the target user attachment point UAP detects that the signal strength of the UE is greater than or equal to a preset threshold, the destination UAP sends handover information to the first mobility control center MCC, where the handover information is used to request to switch the UE. Go to the destination UAP, the destination UAP is controlled by the first MCC;

The destination UAP receives the interest packet information sent by the first MCC, where the interest packet information includes a content name of the first interest packet and user information of the UE, where the first interest packet is sent to the UE by the UE. An interest packet of the original UAP to which the UE is connected and not responded;

The destination UAP modifies the first pending interest table PIT stored in the destination UAP according to the interest packet information, so that when the destination UAP receives the data packet requested by the first interest packet, according to the modified The first PIT sends the data packet to the UE.
The method according to claim 10, wherein said first PIT comprises a first local PIT and a first user pending interest table U-PIT, said first local PIT being used to record that said destination UAP is unresponsive Corresponding relationship between the content name of the interest package and the transmission port, wherein the first U-PIT is used to record a correspondence between the user information and the content name of the interest package that the destination UAP does not respond to.
The method according to claim 10 or 11, wherein after the destination UAP modifies the first PIT stored in the destination UAP according to the information of the first interest packet, the method further includes:

The destination UAP sends feedback information to the first MCC, where the feedback information is used to indicate whether the content name of the first interest packet exists in the first PIT before modification, and whether the destination UAP is cached. There are the data packets.
A method for user terminal UE handover, characterized in that the method includes:

The original user attachment point UAP receives the handover information that is sent by the mobile control center MCC that controls the original UAP, and the handover information includes a handover instruction and user information of the UE, where the handover information is used to request that the UE be handed over to the destination UAP. The original UAP is a UAP currently connected to the UE;

The original UAP queries the second pending interest table PIT stored in the original UAP according to the switching instruction, and determines a content name of the first interest packet corresponding to the user information, where the first interest packet is the UE An interest packet sent to the original UAP that is not responded;

The original UAP sends the information of the first interest package to the MCC, where the information of the first interest package includes a content name of the first interest package and the user information.
The method according to claim 13, wherein said second PIT comprises a second local PIT and a second user pending interest table U-PIT, said second local PIT being used to record that said original UAP is unresponsive Corresponding relationship between the content name of the interest package and the transmission port, wherein the second U-PIT is used to record a correspondence between the user information and the content name of the interest packet that the original UAP does not respond to;

The original UAP queries the second pending interest table PIT stored in the original UAP according to the switching instruction, and determines a content name of the first interest packet corresponding to the user information, including:

The original UAP searches for the content name of the unresponsive interest packet corresponding to the user information of the UE in the second U-PIT;

The original UAP determines that the content name of the unresponsive interest packet corresponding to the user information of the UE exists in the second local PIT, and the original UAP determines that the user information corresponding to the user information of the UE is not The content of the responding interest package is named the content name of the first interest package.
The method according to claim 13 or 14, wherein after the original UAP sends the information of the first interest packet to the MCC, the method further includes:

The original UAP receives the disconnection information sent by the MCC;

The original UAP disconnects the connection with the UE according to the disconnection information.
The method according to claim 15, wherein the disconnecting information further includes forwarding information, and after the original UAP receives the disconnection information sent by the MCC, the method further includes:

The original UAP modifies the second PIT according to the forwarding information, so that when the original UAP receives the data packet requested by the first interest packet, according to the modified second PIT The data packet is sent to the destination UAP or content router CR, which is located on a transmission path for transmitting the data packet to the destination UAP.
A first mobile control center MCC, comprising:

a receiving unit, configured to receive the handover information sent by the destination user attachment point UAP, where the handover information is used to request to switch the user terminal UE to the destination UAP, where the destination UAP is controlled by the first MCC;

a processing unit, configured to acquire, according to the handover information received by the receiving unit, information about a first interest packet, where information of the first interest packet includes a content name of the first interest packet and user information of the UE, The first interest packet is an interest packet that is sent by the UE to an original UAP connected to the UE and is not responded;

a sending unit, configured to send the interest package information to the destination UAP, where the interest package information includes a content name of the first interest package and the user information, where the interest package information is used by the destination UAP modification a first pending interest table PIT stored in the UAP, so that the UAP sends the data packet to the first PIT according to the modified first PIT after receiving the data packet requested by the first interest packet. Said UE.
The first MCC according to claim 17, wherein the handover information includes the user information and a handover instruction, the original UAP is controlled by the first MCC, and the processing unit acquires according to the handover information. The information of the first interest package specifically includes:

Determining the original UAP according to the user information;

And transmitting, by the original UAP, the handover indication information, where the handover indication information includes the handover instruction and the user information, so that the original UAP determines the first corresponding to the user information according to the handover instruction. Information of an interest package;

Receiving information of the first interest packet sent by the original UAP.
The first MCC of claim 18, wherein

The sending unit is further configured to: after sending the interest packet information to the destination UAP, send disconnection information to the original UAP, where the disconnection information is used to indicate that the original UAP is disconnected from the UE Connection.
The first MCC according to claim 17, wherein the handover information includes the user information and a handover instruction, the original UAP is controlled by a second MCC, and the processing unit acquires the first according to the handover information. Information about interest packages, including:

Determining the second MCC according to the user information;

Transmitting the handover indication information to the original UAP via the second MCC, where the handover indication information includes the handover instruction and the user information, so that the original UAP determines the user with the handover instruction according to the handover instruction Information of the first interest package corresponding to the information;

Receiving, by the second MCC, information of the first interest packet sent by the original UAP.
The first MCC of claim 20, wherein

The sending unit is further configured to send, by using the second MCC, disconnection information to the original UAP, where the disconnection information is used to indicate that the original UAP disconnects from the UE.
The first MCC according to claim 19 or 21, wherein the disconnection information further comprises forwarding information, the forwarding information being used by the original UAP to modify a second PIT stored in the original UAP.
A first MCC according to claims 17-22, characterized in that

The processing unit is further configured to determine a transmission path for transmitting the data packet to the destination UAP;

The sending unit is further configured to send first modification information to the first content router CR on the transmission path, where the first modification information is used to indicate that the first CR modifies the first stored in the first CR a third PIT, such that the first CR sends the received data packet to the destination UAP according to the modified third PIT.
The first MCC according to claim 23, wherein the original UAP is controlled by a second MCC.

The sending unit sends second modification information to the first content gateway CGW on the transmission path, where the second modification information is used to instruct the first CGW to modify the fourth PIT stored in the first CGW. So that the first CGW sends the received data packet to the first CR according to the modified fourth PIT.
A first MCC according to claim 23 or 24, wherein

The receiving unit is further configured to receive feedback information sent by the destination UAP, where the feedback information is used to indicate whether a content name of the first interest packet exists in the first PIT before modification, and the destination Whether the data packet is cached in the UAP;

The processing unit determines a transmission path for transmitting the data packet to the destination UAP, specifically:

And determining, when the content name of the first interest packet does not exist in the first PIT before the modification, and the data packet is not cached in the destination UAP, determining the transmission path.
A destination user attachment point UAP, comprising:

a sending unit, configured to send, to the first mobility control center MCC, handover information, when the signal strength of the user terminal UE is greater than or equal to a preset threshold, where the handover information is used to request to switch the UE to the destination UAP, the destination UAP is controlled by the first MCC;

a receiving unit, configured to receive interest packet information sent by the first MCC, where the interest packet information includes a content name of the first interest packet and user information of the UE, where the first interest packet is sent to the UE An interest packet of the original UAP that is connected to the UE and that is not responded;

a processing unit, configured to modify, according to the interest packet information received by the receiving unit, a first to-be-determined interest table PIT stored in the storage unit, so that the receiving unit receives the data requested by the first interest package And when the packet is sent, the sending unit sends the data packet to the UE according to the first PIT modified by the processing unit.
The destination UAP according to claim 26, wherein the first PIT comprises a first local PIT and a first user pending interest table U-PIT, and the first local PIT is used to record that the destination UAP is not responding Corresponding relationship between the content name of the interest package and the transmission port, wherein the first U-PIT is used to record a correspondence between the user information and the content name of the interest packet that the destination UAP does not respond to.
The destination UAP according to claim 26 or 27, wherein after the destination UAP modifies the first PIT stored in the destination UAP according to the information of the first interest packet, the method further includes:

The destination UAP sends feedback information to the first MCC, where the feedback information is used to indicate whether the content name of the first interest packet exists in the first PIT before modification, and whether the destination UAP is cached. There are the data packets.
An original user attachment point UAP, comprising:

a receiving unit, configured to receive handover information that is sent by the mobile control center MCC that controls the original UAP, where the handover information includes a handover instruction and user information of the user terminal UE, where the handover information is used to request to switch the UE to the destination UAP, The original UAP is a UAP currently connected to the UE;

a processing unit, configured to query, according to the switching instruction received by the receiving unit, a second pending interest table PIT stored in the original UAP, and determine a first interest packet corresponding to the user information received by the receiving unit a content name, the first interest packet is an interest packet sent by the UE to the original UAP and not responded;

a sending unit, configured to send information about the first interest packet determined by the processing unit to the MCC, where the information of the first interest packet includes a content name of the first interest package and the user information.
The original UAP according to claim 29, wherein said second PIT comprises a second local PIT and a second user pending interest table U-PIT, said second local PIT being used to record that said original UAP is not responding Corresponding relationship between the content name of the interest package and the transmission port, wherein the second U-PIT is used to record a correspondence between the user information and the content name of the interest packet that the original UAP does not respond to;

The processing unit queries the second to-be-defined interest table PIT stored in the original UAP according to the switching instruction, and determines a content name of the first interest package corresponding to the user information, which specifically includes:

Searching, in the second U-PIT, a content name of an unresponsive interest packet corresponding to the user information of the UE;

Determining, in the second local PIT, a content name of the unresponsive interest packet corresponding to the user information of the UE, where the original UAP determines the unresponsive interest packet corresponding to the user information of the UE The content of the content is named the content name of the first interest package.
The original UAP according to claim 29 or 30, characterized in that

The receiving unit is further configured to receive disconnection information sent by the MCC;

The processing unit is further configured to disconnect the connection with the UE according to the disconnection information.
The original UAP according to claim 31, wherein the disconnection information received by the receiving unit further includes forwarding information.

The processing unit is further configured to modify the second PIT according to the forwarding information, so that when the receiving unit receives the data packet requested by the first interest packet, the sending unit is configured according to the modified The second PIT sends the data packet to the destination UAP or content router CR, the CR being located on a transmission path for transmitting the data packet to the destination UAP.
A communication system, comprising:

A first MCC according to any one of claims 17-25, a destination UAP according to any one of claims 26-28, and a primary UAP according to any one of claims 29-32.