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US 10,856,278 B2Granted
Methods and system for protocol layer enhancements in data offload over small cells
AssigneeBlackBerry Limited
InventorsShiwei Gao, Yufei Wu Blankenship, Zhijun Cai
Life of this patent
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Abstract
A method at a first wireless network element, the method receiving, from a second wireless network element, a plurality of packet data units (PDUs) for a user equipment; transmitting the PDUs to the user equipment (UE); compiling a PDU delivery status report in response to the transmitting of the PDUs; and sending the compiled PDU delivery status report to the second wireless network element.
Claims17
A method at a first wireless network element comprising:
- receiving, from a second wireless network element, a packet data unit (PDU) for a user equipment through a user plane backhaul interface;
- upon receiving the PDU from the second wireless network element, starting a discard timer associated with the PDU;
- attempting to transmit the PDU to the user equipment;
- upon expiry of the discard timer, discarding the PDU if the transmitting is unsuccessful;
- and
- transmitting, to the second wireless network element, an indication of whether the PDU was successfully transmitted or the discard timer expired, the indication comprising a sequence number of the PDU and a first value if the PDU was successfully transmitted and a second value if the discard timer expired through a control plane backhaul interface.
3 more elements
A method at a first wireless network element comprising:
- determining a default discard timer value;
- determining a backhaul delay, wherein the backhaul delay represents a maximum latency in communications between the first wireless network element and a second wireless network element;
- starting a discard timer associated with a packet data unit (PDU);
- transmitting the PDU to a user equipment, through one of a direct wireless connection with the user equipment or via the second wireless network element through a user plane backhaul interface;
- waiting for a successful delivery indication from the second wireless network element through a control plane backhaul interface;
- and
- discarding the PDU upon the expiry of the discard timer, the discard timer being initialized with the default discard timer value when the PDU is transmitted through the direct wireless connection and the discard timer being initialized with the default discard timer value plus the backhaul delay when the PDU is transmitted via the second wireless network element.
4 more elements
A method at a user equipment comprising:
- receiving, through a first direct wireless connection with a first wireless network element, a plurality of packet data units (PDUs) for the user equipment;
- receiving, through a second direct wireless connection with a second wireless network element, a request for a PDU delivery status report;
- transmitting the PDU delivery status report to the second wireless network element through the second direct wireless connection, the PDU delivery status report indicating whether each of the plurality of PDUs were successfully received.
Dependencies are inferred from the claim text.