Method for moving between communication systems, user equipment and storage medium
A technology for a communication system and user equipment, applied in the field of communication, can solve problems such as PDU session cannot be deleted, PDU session does not support seamless movement, UE cannot continue to use services, etc.
Active Publication Date: 2021-05-28
HUAWEI TECH CO LTD
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Problems solved by technology
[0005] However, it is possible that some PDU sessions established on 5G do not support seamless mobility to 4G. When moving, the Mobile Management Entity (MME) will not find the PGW based on the Access Point Name (APN). address to reject the PDN connection establishment request, resulting in the UE being unable to continue using the service
In addition, during the seamless movement of UE from 5G to 4G network, after the PDN connection is established in 4G, the PGW is responsible for deleting the PDU session that has been seamlessly moved from 5G, but for the PDU session that does not support seamless movement to 4G cannot be deleted
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[0102] Embodiments of the present application are described below in conjunction with the accompanying drawings.
[0103] The network architecture and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. For the evolution of architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems. It should be noted that the solutions in the embodiments of the present application can also be applied to other wireless communication networks, and the corresponding names can also be replaced with names of corresponding functions in other wireless communication networks.
[0104] refer to figure 1 As shown in , it is a schematic diagra...
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The embodiment of the invention discloses a method, equipment and a system for moving between communication systems, relates to the field of communication, and is used for deleting immovable sessions when UE moves between the communication systems. The mobile method between communication systems comprises: user equipment (UE) determining whether a first session exists in a first communication system, wherein the first session can be moved from the first communication system to a second communication system; when it is determined that the first session exists, the UE sends a first message to a first core network device of the second communication system, the first message is used for establishing a second session in the second communication system, and the second session corresponds to the first session. The embodiment of the invention is applied to session switching between communication systems.
Description
[0001] This application claims the priority of the patent application submitted to the Chinese Patent Office on March 20, 2017, the application number is PCT / CN2017 / 077387, and the invention name is "a method, device and system for moving between communication systems", the entire content of which Incorporated in this application by reference. technical field [0002] The present application relates to the communication field, and in particular to a method, device and system for moving between communication systems. Background technique [0003] In the fifth generation mobile communication technology (5th Generation, 5G) and fourth generation mobile communication technology (4th Generation, 4G) standards of the latest 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP), user equipment (user equipment, UE) can support dual registration (register on 5G and 4G at the same time). [0004] If the UE seamlessly moves from 5G to 4G in the dual registratio...
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IPC IPC(8): H04W36/00H04W36/14H04W36/18
CPCH04W36/0022H04W36/1443H04W36/13H04W36/08H04W36/00695H04W8/02H04W36/0016H04W4/029
Inventor 金辉欧阳国威杨皓睿窦凤辉何岳
Owner HUAWEI TECH CO LTD