System and method for HARQ in cloud RAN with large front haul latency
First Claim
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1. A remote radio unit device, comprising:
- a processor; and
a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising;
receiving a transmission from a mobile device via a first communication link;
relaying the transmission to a baseband unit device that is remotely coupled to the remote radio unit device via a second communications link; and
in response to a passing of a latency period without receiving an indication from the baseband unit device that the transmission from the mobile device comprises an error, and based on a result of a determination as to whether the transmission from the mobile device contains the error, sending a message to the mobile device, wherein the message is usable by the mobile device to retransmit the transmission.
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Abstract
A system is enabled to perform error checking and other HARQ processes at a remote radio unit device in cloud RAN systems that have a large front haul latency. The remote radio unit device performs error checking on transmissions received from a mobile device and sends an acknowledgement (ACK) or negative acknowledgement (NACK) to the mobile device based on whether errors are found.
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Citations
20 Claims
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1. A remote radio unit device, comprising:
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a processor; and a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising; receiving a transmission from a mobile device via a first communication link; relaying the transmission to a baseband unit device that is remotely coupled to the remote radio unit device via a second communications link; and in response to a passing of a latency period without receiving an indication from the baseband unit device that the transmission from the mobile device comprises an error, and based on a result of a determination as to whether the transmission from the mobile device contains the error, sending a message to the mobile device, wherein the message is usable by the mobile device to retransmit the transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method, comprising:
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receiving, by a remote radio unit device comprising a processor, a transmission from a mobile device via a first communications link after receiving the transmission from the mobile device; relaying, by the remote radio unit device, the transmission to a baseband unit device that is remotely coupled to the remote radio unit device via a second communications link; and in response to a passing of a latency period without receiving, by the remote radio unit device, an indication from the baseband unit device that the transmission from the mobile device comprises an error, and in response to a determination by the remote radio unit device that the transmission from the mobile device comprises the error, sending, by the remote radio unit device, a message to the mobile device, wherein the message comprises information usable by the mobile device to retransmit the transmission. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A computer-readable storage device storing executable instructions that, in response to execution, cause a processor of a remote radio unit device to perform operations, comprising:
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receiving, by the remote radio unit device, a transmission from a mobile device via a first communications link; after receiving the transmission from the mobile device, relaying, by the remote radio unit device, the transmission to a baseband unit device that is remotely coupled to the remote radio unit device via a second communications link; and in response to an elapsing of a latency period without receiving, by the remote radio unit device, an indication from the baseband unit device that the transmission from the mobile device comprises an error, and based on an outcome of a determination by the remote radio unit device as to whether the transmission from the mobile device comprises the error, sending, by the remote radio unit device, a message to the mobile device, wherein the message is able to be used by the mobile device to retransmit the transmission. - View Dependent Claims (19, 20)
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Specification