LINK RE-ESTABLISHMENT METHOD, APPARATUS, AND SYSTEM
First Claim
1. A communication system comprising:
- a control plane (CP) functional entity and a target radio access node (RAN), whereinthe target RAN is configured to receive a re-establishment request message from user equipment (UE), and send a first message to the CP functional entity based on the re-establishment request message, wherein the re-establishment request message comprises a second message authentication code (MAC) generation parameter and a MAC of the UE, the first message comprises the second MAC generation parameter and the MAC;
the CP functional entity, configured to receive the first message from the target RAN, and verify the MAC based on the first message;
when verification of the MAC succeeds, send a context of the UE to the target RAN;
the target RAN, further configured to receive the context of the UE, and send a re-establishment response message to the UE.
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Abstract
The present disclosure discloses a link re-establishment method, an apparatus, and a system. The method includes: obtaining, by user equipment UE, a MAC of the UE based on a NAS integrity key and a first MAC generation parameter, where the first MAC generation parameter includes an identifier of the UE; sending, by the UE, a re-establishment request message to a target RAN, where the re-establishment request message includes the MAC and the first MAC generation parameter; and receiving, by the UE, a re-establishment response message of the target RAN. The UE triggers, by sending the re-establishment request message, a CP functional entity to perform authentication on the UE. This resolves a prior-art problem that an excessively long time is consumed to re-establish a connection to a target RAN by using an RAU procedure, increases a speed of re-establishing a connection between UE and a network, and improves user experience.
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Citations
20 Claims
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1. A communication system comprising:
- a control plane (CP) functional entity and a target radio access node (RAN), wherein
the target RAN is configured to receive a re-establishment request message from user equipment (UE), and send a first message to the CP functional entity based on the re-establishment request message, wherein the re-establishment request message comprises a second message authentication code (MAC) generation parameter and a MAC of the UE, the first message comprises the second MAC generation parameter and the MAC; the CP functional entity, configured to receive the first message from the target RAN, and verify the MAC based on the first message;
when verification of the MAC succeeds, send a context of the UE to the target RAN;the target RAN, further configured to receive the context of the UE, and send a re-establishment response message to the UE. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a control plane (CP) functional entity and a target radio access node (RAN), wherein
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9. A communication method applied to a communication system comprising a control plane (CP) functional entity and a target radio access node (RAN), the method comprising:
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receiving, by the target radio access node (RAN), a re-establishment request message from user equipment (UE); sending, by the target RAN, a first message to the control plane (CP) functional entity based on the re-establishment request message, wherein the re-establishment request message comprises a second message authentication code (MAC) generation parameter and an MAC of the UE, the first message comprises the second MAC generation parameter and the MAC; receiving, by the CP functional entity, the first message from the target RAN; verifying, by the CP functional entity, the MAC based on the first message; when verification of the MAC succeeds, sending, by the CP functional entity, a context of the UE to the target RAN; receiving, by the target RAN, the context of the UE; and sending, by the target RAN, a re-establishment response message to the UE. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A communication apparatus comprising:
- at least one processor and a memory;
whereinthe memory, configured to store a program; and the at least one processor, configured to execute the program stored in the memory to enable the communication apparatus to implement the following operations; receiving a first message from a target radio access node (RAN), wherein the first message comprises a second message authentication code (MAC) generation parameter and an MAC of user equipment (UE); verifying the MAC based on the first message; and when verification of the MAC succeeds, sending a context of the UE to the target RAN. - View Dependent Claims (16, 17, 18, 19, 20)
- at least one processor and a memory;
Specification