초록 ▼

A method for forwarding downlink packets based on S1 handover is disclosed. The method includes: numbering a packet not processed by using PDCP according to a message that comprises PDCP Serial Number (SN) information if downlink packets to be forwarded include the packet not processed by using PDCP

A method for forwarding downlink packets based on S1 handover is disclosed. The method includes: numbering a packet not processed by using PDCP according to a message that comprises PDCP Serial Number (SN) information if downlink packets to be forwarded include the packet not processed by using PDCP; and sending the downlink packets to the UE according to the PDCP SN corresponding to the packet included in the downlink packets. A method for forwarding uplink packets based on S1 handover is disclosed. The method includes: receiving state report information of the packet sent by the target eNodeB; and sending the packet according to the state report information of the packet. Another method for forwarding downlink packets based on S1 handover and an eNodeB are disclosed. Through the embodiments of the present disclosure, the packets are forwarded without loss in the case of S1 handover.

대표청구항 ▼

1. A method for forwarding downlink packets, comprising: receiving, by a target evolved NodeB (eNodeB), when ensuring a lossless handover for a user equipment (UE), a control message outside a user plane from a source eNodeB, the control message including an initial Packet Data Convergence Protocol

1. A method for forwarding downlink packets, comprising: receiving, by a target evolved NodeB (eNodeB), when ensuring a lossless handover for a user equipment (UE), a control message outside a user plane from a source eNodeB, the control message including an initial Packet Data Convergence Protocol (PDCP) serial number (SN) and a defined relationship between the initial PDCP SN and a GPRS tunneling protocol user serial number (GTP-U SN);receiving, by the target eNode B, a plurality of packets without processing (non-PDCP packets), each non-PDCP packet in the plurality of non-PDCP packets being already numbered with its corresponding unique GTP-U SN;processing, by the target eNodeB, the plurality of non-PDCP packets into PDCP packets by assigning the initial PDCP SN for a first non-PDCP packet, and assigning a PDCP SN to each remaining non-PDCP packet in accordance with the GTP-U SN corresponding to the remaining non-PDCP packet and the relationship between the initial PDCP SN and the GTP-U SN of the first non-PDCP packet; andsending, by the target eNodeB, the PDCP packets to the UE. 2. The method according to claim 1, further comprising: receiving, by the target eNodeB, the plurality of non-PDCP packets from the source eNodeB. 3. The method according to claim 1, wherein the control message is sent from the source eNodeB to the target eNodeB through a mobility management entity (MME). 4. The method according to claim 3, wherein the control message is sent from the source eNodeB to the target eNodeB through a MME further comprising: the control message is sent from the source eNodeB to the target eNodeB through a source MME and a target MME. 5. An evolved NodeB (eNodeB), comprising: a receiving unit, configured to receive, when ensuring a lossless handover for a user equipment (UE), a control message outside a user plane from a source eNodeB, wherein the control message includes an initial packet data convergence protocol serial number (PDCP SN) and a defined relationship between the initial PDCP SN and a GPRS tunneling protocol user serial number (GTP-U SN), and wherein the receiving unit is further configured to receive a plurality of packets without processing (non-PDCP packets), each non-PDCP packet in the plurality of non-PDCP packets being already numbered with its corresponding unique GTP-U SN;a sorting unit, connected with the receiving unit and configured to perform processing the plurality of non-PDCP packets into PDCP packets by assigning the initial PDCP SN for a first non-PDCP packet, and assigning a PDCP SN for each remaining non-PDCP packet in accordance with the GTP-U SN corresponding to the remaining non-PDCP packet and the relationship between the initial PDCP SN and the GTP-U SN of the first non-PDCP packet; anda sending unit, configured to send the PDCP packets to the UE. 6. The eNodeB according to claim 5, wherein the receiving unit is further configured to receive the plurality of non-PDCP packets from the source eNodeB. 7. The eNodeB according to claim 5, wherein the receiving unit is further configured to receive the control message through a mobility management entity (MME). 8. The eNodeB according to claim 7, wherein the receiving unit is further configured to receive the control message through a source MME and a target MME.