Multi-Pair Cable Measurements for 5G Indoor Service Provisioning

Pin-Han Ho

^∗Department of Electrical and Computer Engineering, University of Waterloo, ON, Canada

^†Zhongtian Broadband Technology Co., Ltd., Nantong, People’s Republic of China

^‡Department of Computer Science, Western University, ON, Canada

^§Nordicity Inc., ON, Canada

E-mails: {shrnaqvi, p4ho}@uwaterloo.ca, [email protected], [email protected]

This paper considers the 5G new radio (NR) indoor service provisioning scenario where the CPRI link terminates at remote radio unit (RRU) in the building and multi-pair cable, i.e. CAT-5, is used to provide connectivity between distributed antenna unit (DAU) and RRU. The paper focuses on the de-tailed methodology for multi-pair copper channel measurement including measurement equipment specifications, their respective settings, measurement parameters i.e. characteristics impedance, insertion loss (IL), far-end-crosstalk (FEXT) and near-end-crosstalk (NEXT).

The measurements include the cables for next-generation multi-pair system, where multi-pair cables, i.e. CAT-5 cables, are used from the RRU to the DAUs in a building. Conventionally, many multi-pair cables share the same duct in a building and interfere with each other, therefore two parallel multi-pair CAT-5 cables of 50m each are considered for the measurement scenario. This setup result in 4 twisted pairs terminate at each DAU and this configuration is termed as next-generation multi-pair MIMO (NGMM). The number of twisted pairs is increased by using the Phantom mode circuit connected to the opposite ends of each CAT-5 cable and the resulting configuration is called next-generation multi-pair super MIMO (NGMSM). The cable parameters have been measured for frequencies up to 1 GHz and 250 MHz for NGMM and NGMSM, respectively. DL data rate of each configuration is examined by applying conventional block diagonalization.

Multi-Pair Cable Measurement, C-RAN, Radio over Cable, 5G indoor service provisioning

Syed Hassan Raza Naqvi, Pin-Han Ho, Sagar Naik, Anwar Haque, and Tanveer Ahmed (2021). Multi-Pair Cable Measurements for 5G Indoor Service Provisioning. Journal of Networking and Network Applications, Volume 1, Issue 1, pp. 28–39. https://doi.org/10.33969/J-NaNA.2021.010104.

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