Method, system, and device for network handoff
First Claim
Patent Images
1. A method for network handoff, the method comprising:
- sending, by a first evolved Access Network (eAN), a session transfer request to a target eAN that corresponds to a network handoff request, wherein the session transfer request contains session information of the UE, a Packet Data Network Gateway (PDN-GW) address, and a Generic Routing Encapsulation (GRE) key of an uplink tunnel between a Serving Gateway (S-GW) and the PDN-GW;
receiving, by the first eAN, a session transfer response from the target eAN; and
sending, by the first eAN, a Traffic Channel Assignment (TCA) message to a User Equipment (UE) based on the session transfer response, so as to enable the UE to switch from a Long Term Evolution (LTE) network to an evolved High Rate Packet Data (eHRPD) network based on the TCA message.
1 Assignment
0 Petitions
Accused Products
Abstract
A method, a system, and a device for network handoff is disclosed. A first evolved Access Network (eAN) sends a session transfer request to the target eAN that corresponds to the network handoff request. The first eAN receives a session transfer response from the target eAN. The first eAN sends a Traffic Channel Assignment (TCA) message to a User Equipment (UE) based on the session transfer response, so that the UE can switch from a Long Term Evolution (LTE) network to an evolved High Rate Packet Data (eHRPD) network based on the TCA message.
-
Citations
21 Claims
-
1. A method for network handoff, the method comprising:
-
sending, by a first evolved Access Network (eAN), a session transfer request to a target eAN that corresponds to a network handoff request, wherein the session transfer request contains session information of the UE, a Packet Data Network Gateway (PDN-GW) address, and a Generic Routing Encapsulation (GRE) key of an uplink tunnel between a Serving Gateway (S-GW) and the PDN-GW; receiving, by the first eAN, a session transfer response from the target eAN; and sending, by the first eAN, a Traffic Channel Assignment (TCA) message to a User Equipment (UE) based on the session transfer response, so as to enable the UE to switch from a Long Term Evolution (LTE) network to an evolved High Rate Packet Data (eHRPD) network based on the TCA message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. An evolved Access Network (eAN), comprising:
-
a session transfer request processing unit, configured to send a network handoff request to a target eAN that corresponds to a network handoff request, wherein the session transfer request processing unit is specifically configured to send the target eAN a session transfer request containing session information of the UE, a Packet Data Network Gateway (PDN-GW) address, and a Generic Routing Encapsulation (GRE) key of an uplink tunnel between a Serving Gateway (S-GW) and the PDN-GW; a session transfer response receiving unit, configured to receive a session transfer response from the target eAN; and a Traffic Channel Assignment (TCA) sending unit, configured to send a TCA message to a User Equipment (UE) based on the session transfer response received by the session transfer response receiving unit, so as to enable the UE to switch from a Long Term Evolution (LTE) network to an evolved High Rate Packet Data (eHRPD) network based on the TCA message. - View Dependent Claims (13, 14, 15, 16)
-
-
17. An evolved Access Network (eAN), comprising:
-
a transfer request receiving unit, configured to receive a session transfer request containing session information of a User Equipment (UE), a Packet Data Network Gateway (PDN-GW) address, and a Generic Routing Encapsulation (GRE) key of an uplink tunnel between a Serving Gateway (S-GW) and the PDN-GW; a session information processing unit, configured to store the session information received by the transfer request receiving unit; a registration request sending unit, configured to send a High Rate Packet Data Serving Gateway (HSGW) a registration request containing the PDN-GW address and the GRE key of the uplink tunnel received by the transfer response receiving unit, so as to enable the HSGW to send uplink data to the PDN-GW by using the PDN-GW address and the GRE key of the uplink tunnel; a registration response receiving unit, configured to receive, from the HSGW, a registration response containing an HSGW address and a GRE key of a uni-directional tunnel from the S-GW to the HSGW; an air interface resource allocating unit, configured to allocate an air interface resource for the UE; and a transfer response sending unit, configured to send a session transfer response containing information about the air interface resource, the HSGW address, and the GRE key of the uni-directional tunnel. - View Dependent Claims (18, 19)
-
-
20. A method for network handoff, the method comprising:
-
receiving a session transfer request containing session information of a User Equipment (UE), a Packet Data Network Gateway (PDN-GW) address, and a Generic Routing Encapsulation (GRE) key of an uplink tunnel between a Serving Gateway (S-GW) and the PDN-GW; storing the session information; sending a High Rate Packet Data Serving Gateway (HSGW) a registration request containing the PDN-GW address and the GRE key of the uplink tunnel, so as to enable the HSGW to send uplink data to the PDN-GW by using the PDN-GW address and the GRE key of the uplink tunnel; receiving, from the HSGW, a registration response containing an HSGW address and a GRE key of a uni-directional tunnel from the S-GW to the HSGW; allocating an air interface resource for the UE; and sending a session transfer response containing information about the air interface resource, the HSGW address, and the GRE key of the uni-directional tunnel. - View Dependent Claims (21)
-
Specification