10/29/2022 0 Comments Y.625 ethernet testingThe proposed estimator calculates the correlation coefficient between captured uplink traffic and the seven types of uplink and downlink ratio patterns standardized by the third generation partnership project (3GPP: ). ![]() This paper proposes an estimation technique without a test signal transmission and an estimation-error recovery scheme. However, a scheme for recovering from an error when the estimation is wrong and the test signal is not transmitted has yet to be studied. For the above reason, we have already proposed a technique for estimating unallocated intervals in a TDD-based MFH link that involves pre-learning based on a test signal transmission, and the signal of the secondary service is accommodated in the unallocated intervals. Since a PON link is a wavelength division multiplexing (WDM) scheme, whereas a radio propagation link is a TDD scheme, unallocated intervals occur periodically in the PON link. We focus on the fact that a time division duplex (TDD) scheme will be applied to future radio access (FRA). To realize an even more cost-effective network, we have studied the accommodation of MFH and secondary services in a single TDM-PON. Time division multiplexing passive optical networks (TDM-PONs) are attracting attention as a cost-effective way of realizing mobile fronthaul (MFH), which is an optical link between a central unit (CU) and a distributed unit (DU) in a centralized radio access network (C-RAN).
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