Nokia Corporation

Nokia Siemens Networks Oy

Pablo Ameigeiras

Jeroen Wigard

Woonhee Hwang

Troels Emil Kolding

Preben Elgaard Mogensen

Eero Sillasto

Hannu Tapio Häkkinen

A method, system and transmitting side protocol entity is disclosed for sending packet data units for unacknowledged mode services in a mobile communication network. A retransmission parameter is set to a desired value in order to prevent retransmission of packet data units in a handover situation. The transmitting side acknowledged mode radio link control entity purges from the retransmission buffer based on status reports from a user equipment. The packet data units that have been acknowledged by user equipment. A status report includes the sequence number of the highest packet data unit expected by the user equipment, and therefore the status report indicates the sequence number of the radio link control packet data units that have been received at the user equipment (either correctly or incorrectly). All the remaining packet data units in the retransmission buffer are scheduled for transmission and transmitted to the new node.

Method, system and transmitting side protocol entity for sending packet data units for unacknowledged mode services

The present invention relates to a method and system for scheduling data packets in a base station device of an access network. An information indicating a retransmission status of a data packet is provided to the base station device, and a scheduling priority is allocated to the data packet based on the retransmission status information. Thereby, retransmission packets can be scheduled earlier and round trip times can be reduced, so as to decrease the risk of timeouts and stalling and to loosen buffer requirements.

Scheduling retransmission in access networks

According to the present invention the use of a delayed acknowledgment procedure of TCP in a communication network system arranged to transport TCP/IP packets is controlled. A burstiness of received TCP packets transmitted in the communication network system from an entity to a device is monitored and it is decided whether the monitored burstiness meets a predefined condition. On the basis of the decision result the delayed acknowledgment procedure is enabled or disabled.

Adaptive delayed ACK switching for TCP applications

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Aalborg, Denmark

Pablo Ameigeiras