US 9,544,097 B1Granted

System and method for retransmission of MBMS data flow

AssigneeSprint Spectrum L.P.

InventorsDaniel Vivanco, Krishna Sitaram

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Abstract

Systems and methods for operating a wireless communication system are provided. An access node can receive a multimedia broadcast multicast services data flow. The data flow can comprise a first data packet and a second data packet where the first data packet comprises a first transmission time and the second data packet comprises a second transmission time. The data flow can be stored in a buffer of the access node. The first data packet can be transmitted from the access node to a wireless device at the first transmission time and the access node can receive a retransmission request to retransmit the first data packet. The access node can determine an anticipated packet retransmission time based on when the access node received the request to retransmit the first data packet. The access node can retransmit the first data packet to the wireless device based on the anticipated packet retransmission time.

Claims17

Dependent claims

A method of operating a wireless communication system comprising:

receiving at an access node a first multimedia broadcast multicast services (MBMS) data flow comprising a first data packet and a second data packet, the first data packet comprising a first transmit time and the second data packet comprising a second transmit time;
transmitting from the access node to a wireless device the first data packet at the first transmit time;
receiving from the wireless device at the access node a retransmission request at a retransmission request receipt time, wherein the retransmission request comprises a request to retransmit the first data packet;
determining an anticipated retransmission time based on the second transmit time of the second data packet and the retransmission request receipt time of the retransmission request;
when the anticipated retransmission time meets a predetermined retransmission time, retransmitting the first data packet from the access node to the wireless device;
and
when the retransmission request receipt time does not meet the predetermined retransmission time, transmitting from the access node to a controller node a MBMS data flow retransmission request to retransmit the first data packet.

4 more elements

A method of operating a wireless communication system comprising:

transmitting from a controller node a first multimedia broadcast multicast services (MBMS) data flow to a plurality of access nodes, the MBMS data flow comprising a first data packet comprising a first transmission time and a second data packet comprising a second transmission time;
receiving at the controller node a MBMS data flow retransmission request, wherein the MBMS data flow retransmission request comprises a request to retransmit the first data packet from at least one access node at a data flow retransmission request receipt time, and wherein the MBMS data flow retransmission request is received from the at least one access node when a difference between the second transmission time and the data flow retransmission request receipt time exceeds a predetermined threshold;
determining a second MBMS data flow anticipated retransmission time based on the first transmission time and the MBMS data flow retransmission request receipt time;
determining a group of access nodes from the plurality of access nodes based on the second MBMS data flow anticipated retransmission time;
and
transmitting from the controller node to the group of access nodes a second MBMS data flow comprising the first data packet having a fourth transmission time.

3 more elements

Dependencies are inferred from the claim text.