Downlink Data Transmission Method, Base Station, and Serving Gateway on LTE Network
AssigneeHuawei Technologies Co., Ltd.
InventorsLixue Zhang, Xiaolong Guo
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Abstract
The present invention provides a downlink data transmission method, base station, and serving gateway on an LTE network. The method includes: learning, by an eNB, that a UE needs to be paged, when an S1 bearer is retained and a radio bearer is released; paging, by the eNB, the UE and re-establishing a radio bearer between the eNB and the UE; and sending, by the eNB, downlink data, which is received from an S-GW, to the UE through the re-established radio bearer. Embodiments of the present invention can ensure correct transmission of downlink data, and avoid data loss.
Claims20
A downlink data transmission method on a long term evolution (LTE) network, the method comprising:
- determining, by a base station, that an S1 bearer between the base station and a serving gateway (S-GW) for a user equipment (UE) is retained and a radio bearer is released;
- based on the determining, paging, by the base station, the UE and re-establishing a radio bearer between the base station and the UE;
- and
- sending, by the base station, downlink data received from the serving gateway (S-GW), to the UE through the re-established radio bearer.
A base station comprising:
- a processor configured to execute instructions to determine that an S1 bearer between the base station and a serving gateway (S-GW) for a user equipment (UE) is retained and a radio bearer is released, and page the UE and re-establish a radio bearer between the base station and the UE;
- a receiver configured to receive downlink data from a serving gateway (S-GW);
- and
- a transmitter configured to send the downlink data to the UE through the radio bearer re-established by the processor.
A serving gateway (S-GW) comprising a processor coupled with a transmitter and a receiver, wherein
- the processor is configured to:
- determine that a radio bearer corresponding to an S1 bearer between the base station and a serving gateway (S-GW) for a user equipment (UE) does not exist when downlink data is received and the S1 bearer is retained, and
- control the transmitter to send a downlink data notification to a mobility management entity (MME);
- the transmitter is configured to send the downlink data notification to the MME for the MME to send a paging instruction to a base station after receiving the downlink data notification, wherein the paging instruction is used to instruct the base station to page the UE corresponding to the S1 bearer and re-establish a radio bearer between the base station and the UE;
- and
- the transmitter is further configured to send the downlink data to the UE through the S1 bearer and the radio bearer.
Dependencies are inferred from the claim text.