Method for handover without default bearer and device
First Claim
1. A method for a handover without a default bearer, the method comprising:
- sending, by a first network device, a relocation request to a second network device, wherein the relocation request comprises information about a third network device and a forwarding mode identifier, wherein the information about the third network device is used for the second network device to establish a connection to the third network device, and the forwarding mode identifier is used for indicating direct forwarding or indirect forwarding, wherein the first network device forwards data between the third network device and a source network device, and the second network device forwards data for a target network device, and wherein the relocation request is sent in response to a request of a handover from the source network device to the target network device;
receiving, by the first network device, a relocation response sent by the second network device, wherein the relocation response carries indication information indicating that data is to be forwarded by using a signaling plane;
sending, by the first network device, a handover command to the source network device, so that the source network device forwards data to the target network device according to a forwarding mode indicated by the forwarding mode identifier carried in the handover command; and
sending, by the first network device, a relocation complete message to the second network device, so that the second network device sends a handover complete notification message to the third network device, and the third network device updates serving node information from an address of the first network device to an address of the second network device, wherein the target network device communicates with the third network device through the second network device without using a data plane bearer after the handover is completed.
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Abstract
Embodiments of the present application provide a method for a handover without a default bearer. A first network device sends a relocation request to a second network device. The second network device establishes a connection to a third network device indicated by the relocation request, and sends a response to the first network device and indicates that data is to be sent by using a signaling plane. Then the first network device instructs a source network device to forward the data to a target network device according to a forwarding mode indicated by a handover command. Alternatively, after the second network device establishes the connection to the third network device indicated by the relocation request, the third network device caches data, and after a handover of user equipment is completed, the third network device sends the cached data to the second network device.
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Citations
20 Claims
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1. A method for a handover without a default bearer, the method comprising:
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sending, by a first network device, a relocation request to a second network device, wherein the relocation request comprises information about a third network device and a forwarding mode identifier, wherein the information about the third network device is used for the second network device to establish a connection to the third network device, and the forwarding mode identifier is used for indicating direct forwarding or indirect forwarding, wherein the first network device forwards data between the third network device and a source network device, and the second network device forwards data for a target network device, and wherein the relocation request is sent in response to a request of a handover from the source network device to the target network device; receiving, by the first network device, a relocation response sent by the second network device, wherein the relocation response carries indication information indicating that data is to be forwarded by using a signaling plane; sending, by the first network device, a handover command to the source network device, so that the source network device forwards data to the target network device according to a forwarding mode indicated by the forwarding mode identifier carried in the handover command; and sending, by the first network device, a relocation complete message to the second network device, so that the second network device sends a handover complete notification message to the third network device, and the third network device updates serving node information from an address of the first network device to an address of the second network device, wherein the target network device communicates with the third network device through the second network device without using a data plane bearer after the handover is completed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A network device, comprising:
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a communications interface configured to communicate with a network element; a processor; a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions for; sending a relocation request to a second network device, wherein the relocation request comprises information about a third network device and a forwarding mode identifier, wherein the information about the third network device is used for the second network device to establish a connection to the third network device, and the forwarding mode identifier is used for indicating direct forwarding or indirect forwarding, wherein the first network device forwards data between the third network device and a source network device, and the second network device forwards data for a target network device, and wherein the relocation request is sent in response to a request of a handover that is from the source network device to the target network device; receiving a relocation response sent by the second network device, wherein the relocation response carries indication information indicating that data is to be forwarded by using a signaling plane; sending a handover command to a source network device, so that the source network device forwards the data to a target network device according to a forwarding mode indicated by the forwarding mode identifier carried in the handover command; and sending a relocation complete message to the second network device, so that the second network device sends a handover complete notification message to the third network device, and the third network device updates serving node information from an address of the network device to an address of the second network device, wherein the third network device communicates with the target network device through the second network device without using a data plane bearer after the handover is completed. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A network device, comprising:
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a communications interface configured to communicate with a network element; a processor coupled to the communications interface; and a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions for; receiving a relocation request sent by a first network device, wherein the relocation request comprises information about a third network device, wherein the information about the third network device is used for the network device to establish a connection to the third network device; establishing the connection to the third network device, and indicating to the third network device that a handover of a user equipment starts, so that the third network device caches data for the user equipment, wherein the user equipment is handed over from a source network device to a target network device, and wherein the first network device forwards data between the source network device and the third network device, and the network device forwards data between the target network device and the third network device; sending a relocation response to the first network device in response to the relocation request sent by the first network device, wherein the relocation response carries indication information indicating that the cached data is to be forwarded by using a signaling plane; and receiving the cached data for the user equipment from the third network device using the signaling plane without using a data plane bearer after the user equipment is handed over to the target network device. - View Dependent Claims (19, 20)
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Specification