Patent ID: 9515778
Filing Date: 2016-12-06
CPC Classification: H04L

Claim Text:
1. A communication control apparatus, comprising: first obtaining circuitry configured to obtain a first communication status indicating a frequency of occurrence of data loss during first data communication from a first communication device to a second communication device, the second communication device including measurement circuitry that measures the first communication status based on sequence numbers of a plurality of packets arriving from the first communication device to the second communication device; second obtaining circuitry configured to obtain a second communication status indicating a frequency of occurrence of data loss during second data communication from the second communication device to the first communication device, the first communication device including measurement circuitry that measures the second communication status based on sequence numbers of a plurality of packets arriving from the second communication device to the first communication device; first determination circuitry configured to determine a number of retransmission trials of data identical to lost data to be retransmitted from the first communication device to the second communication device, the number of retransmission trials corresponding to the first communication status; second determination circuitry configured to determine a number of request trials, the number of request trials being a number of transmission trials of a retransmission request message to be retransmitted from the second communication device to the first communication device, the number of request trials corresponding to the second communication status, the retransmission request message containing information specifying the number of retransmission trials; and retransmission control circuitry configured to control transmission of the retransmission request message in accordance with the number of request trials determined by the second determination circuitry.