Back to results
US 8,553,698 B2Granted
Data unit sender and data unit relay device
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsHenning Wiemann, Reiner Ludwig, Michael Meyer
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsHenning Wiemann, Reiner Ludwig, Michael Meyer
Estimating the term…
New methods and devices for implementing an ARQ mechanism over a multi-hop connection (sender-relay-receiver) are proposed. A communication protocol is described in accordance with which data units are arranged in a sequence and each sent data unit is identifiable by a sequence position identifier. The sender implements a sending peer, the relay a relay peer and the receiver a receiving peer. Feedback messages are exchanged, which using said sequence position identifiers, carry information on a receipt of sent data units. The communication protocol provides for at least a first type and a second type of receipt information, the first type (RACK) of receipt information being indicative of a correct receipt of a data unit at a relay peer of said communication protocol, and the second type (ACK) of receipt information being indicative of a correct receipt of a data unit at a final destination peer of said communication protocol.
A method for implementing a communication protocol where data units are transmitted from a sending peer of said communication protocol to a receiving peer of said communication protocol over one or more relay peers of said communication protocol, using feedback messages sent in a direction of said sending peer, wherein in accordance with said communication protocol said data units are arranged in a sequence and each sent data unit is identifiable by a sequence position identifier, and said feedback messages, using said sequence position identifiers, carry information on a receipt of said data units, said communication protocol providing for at least a first type and a second type of receipt information, said first type (RACK) of receipt information being indicative of a correct receipt of a data unit at one of said one or more relay peers of said communication protocol, and said second type (ACK) of receipt information being indicative of a correct receipt of a data unit at the receiving peer of said communication protocol, and where each of said one or more relay peers is arranged to forward said second type of receipt information in the direction of said sending peer, and said sending peer is arranged to hold each data unit of said sequence until having received a corresponding feedback message with said second type of receipt information.
A communication network in which there is implemented a communication protocol for transmitting data units from a sending peer of said communication protocol to a receiving peer of said communication protocol over one or more relay peers of said communication protocol, using feedback messages sent in a direction of said sending peer, wherein in accordance with said communication protocol said data units are arranged in a sequence and each sent data unit is identifiable by a sequence position identifier, and said feedback messages, using said sequence position identifiers, carry information on a receipt of said data units, said communication protocol providing for at least a first type and a second type of receipt information, said first type (RACK) of receipt information being indicative of a correct receipt of a data unit at one of said one or more relay peers of said communication protocol, and said second type (ACK) of receipt information being indicative of a correct receipt of a data unit at the receiving peer of said communication protocol, and
Dependencies are inferred from the claim text.