45 lines
2.1 KiB
Plaintext
45 lines
2.1 KiB
Plaintext
docker build -f docker/Dockerfile.gnb_e2 -t nakaolab:sep1 .
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O-RU and O-DU are connected via the Fronthaul (FH) interface.
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FH traffic is logically diviced into 4 planes:
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1. Control Plane which transports real-time slot configuration control messages
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2. User Plane which transports IQ samples data (amplitude and phase)
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3. Synchronization Plane transports timing information messages
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4. Management Plane carries non-real-time management operation messages
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C/U Plane messages are exchanged using the eCPRI protocol.
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The energy consumption of RU can be modeled as
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P = P_0 + P_RF + P_BB + P_PAM
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where
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P_0 : baseline components in the RU (fabric, ethernet, PCIe, etc.)
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P_RF : a-to-d/d-to-a converters (ADC/DAC) and the freq up/down converters
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P_BB : core digital processor (eFPGA) and the other low-PHY processing units
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(e.g. beamforming) for each antenna chain
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P_PAM : power amplifier module (PAM) at each antenna chain
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The paper claims that components other than PAM are rather static (?)
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-> I guess the PAM is controlled by RF. Thus P_RF is the minimum amount of power
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required to run RF.
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P_PAM = P_(PAM, 0) * P_(PAM, c)(r) * E_PAM * n_ant
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where
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P_(PAM, 0) : baseline power consumption that depends on the n of antennas,
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ganging elements, and the maximum EIRP per antenna
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* EIRP (Effective Isotropic Radiated Power) is the total power radiated
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by an antenna in the direction of its maximum gain, referenced to an ideal isotropic radiator.
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P_(PAM, c)(r) : a factor that depends on _the amount of subcarriers to be amplified_,
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which in turn depends on the n of RBs (r) carried therein
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E_PAM : captures the efficiency of the amplifier to convert DC power into signal power gain
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n_ant : n of radio chains (with ONE amplifier per radio chain)
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> This observation motivates the principle behind the solution we propose in this paper:
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consolidate data into as few symbol periods as possible, using more radio resources per period instead.
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Since keeping PAM awake consumes more energy, it is better to send data in short bursts, where each burst
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utilizes more spectrum resources
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MIMO Muting
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