Method and apparatus for using a relay to provide physical and hybrid automatic repeat request functionalities
AssigneeInterDigital Patent Holdings, Inc.
InventorsStephen E. Terry, Prabhakar R. Chitrapu, Mohammed Sammour
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Abstract
Methods and apparatus are described for performing automatic repeat request (ARQ) and hybrid-ARQ (HARQ) assisted ARQ procedures in a relay-based wireless communication system. Triggers for radio link control (RLC)/ARQ retransmissions and RLC/ARQ status reporting are also described.
Claims36
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The method of claim 21 further comprising:
- the relay node transmitting an ARQ triggering signal to an RLC/ARQ unit of the transmitter to initiate a retransmission of the RLC PDU on a condition that an HARQ transmission failure occurs at the receiver.
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The method of claim 21 wherein the transmitter resides in a wireless transmit/receive unit (WTRU).
The method of claim 21 wherein the transmitter resides in a Node-B.
The method of claim 21 further comprising:
- the relay node transmitting a status report triggering signal to a first RLC/ARQ unit of the receiver to initiate a transmission of an RLC/ARQ status report from the first RLC/ARC unit of the receiver to a second RLC/ARQ unit of the transmitter.
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A method of using a relay node to provide physical (PHY) and hybrid automatic repeat request (HARQ) functionalities for use by a transmitter and a receiver, the transmitter and receiver comprising a respective medium access control (MAC)/HARQ unit, and the relay node comprising a first MAC/HARQ unit and a second MAC/HARQ unit, the method comprising:
- the first MAC/HARQ unit of the relay node receiving, from the MAC/HARQ unit of the transmitter, a first indication of a MAC protocol data unit (PDU) containing at least a portion of a radio link control (RLC) PDU generated at the transmitter;
- the first MAC/HARQ unit of the relay node sending a second indication of the MAC PDU to the second MAC/HARQ unit of the relay node;
- the second MAC/HARQ unit of the relay node sending a third indication of the MAC PDU to the MAC/HARQ unit of the receiver;
- and
- the second MAC/HARQ unit of the relay node receiving HARQ feedback from the MAC/HARQ unit of the receiver in response to the sending of the third indication of the MAC PDU.
A relay node configured to provide physical (PHY) and hybrid automatic repeat request (HARQ) functionalities for use by a transmitter and a receiver comprising respective medium access control (MAC)/HARQ units, the relay node comprising:
- a first MAC/HARQ unit;
- and
- a second MAC/HARQ unit,
- wherein the first MAC/HARQ unit is configured to receive, from the MAC/HARQ unit of the transmitter, a first indication of a MAC protocol data unit (PDU) containing at least a portion of a radio link control (RLC) PDU generated at the transmitter, the first MAC/HARQ unit being further configured to send a second indication of the MAC PDU to the second MAC/HARQ unit of the relay node, and
- wherein the second MAC/HARQ unit is configured to send a third indication of the MAC PDU to the MAC/HARQ unit of the receiver and receive HARQ feedback from the MAC/HARQ unit of the receiver in response to the sending of the third indication of the MAC PDU.
A method of using a relay node to provide physical (PHY) and hybrid automatic repeat request (HARQ) functionalities, the method comprising:
- a first MAC/HARQ unit of the relay node receiving a first indication of a MAC protocol data unit (PDU) containing at least a portion of an RLC PDU;
- the first MAC/HARQ unit of the relay node sending a second indication of the MAC PDU to a second MAC/HARQ unit of the relay node;
- the second MAC/HARQ unit of the relay node sending a third indication of the MAC PDU;
- and
- the second MAC/HARQ unit of the relay node receiving HARQ feedback in response to the sending of the third indication of the MAC PDU.
A relay node configured to provide physical (PHY) and hybrid automatic repeat request (HARQ) functionalities, the relay node comprising:
- a first MAC/HARQ unit;
- and
- a second MAC/HARQ unit,
- wherein the first MAC/HARQ unit is configured to receive a first indication of a MAC protocol data unit (PDU) containing at least a portion of an RLC PDU, and wherein the first MAC/HARQ unit of the relay node is configured to send a second indication of the MAC PDU to the second MAC/HARQ unit, and
- wherein the second MAC/HARQ unit of the relay node is configured to send a third indication of the MAC PDU and receive HARQ feedback in response to the sending of the third indication of the MAC PDU.
Dependencies are inferred from the claim text.