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Work item:
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L.BBU
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Subject/title:
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Requirements and use cases of liquid cooling solutions and high energy efficiency solutions for 5G BBU in C-RAN mode
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Status:
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[Carried to next study period]
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Approval process:
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AAP
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Type of work item:
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Recommendation
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Version:
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New
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Equivalent number:
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-
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Timing:
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-
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Liaison:
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ETSI
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Supporting members:
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China Telecom, CHINA, ZTE, CHINA MOBILE, Telecom Italia
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Summary:
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Energy consumption of 5G base station is several times higher than that of 4G base station. 5G BBU is deployed in the cabinet in C-RAN mode, which not only has a large total power (10 BBUs reach 5-6KW), but also because the BBU air flow sometimes is not reasonable, which makes it difficult to cool the cabinet. The traditional cooling mode in data centre is not suitable for the cooling demand of 5G BBU in C-RAN mode. The BBU equipment with liquid spray can cool the BBU chip/board with high density and the main board without relying on any air flow channel.
Using spray liquid cooling technology can not only solve the problem of low energy efficiency for 5G base station(BBU centralized deployment-the C-RAN mode), but also solve the problem of high density of BBU chip and difficulty of heat dissipation. However, as a new technology completely different from the traditional air cooling technology, it needs a complete system design and safety protection mechanism; otherwise unexpected safety risks may appear and damage the whole system.
This contribution provides the introduction of technical requirements and implementation scheme of BBU spray liquid cooling system, performance parameters of spray liquid, and working process of BBU spray liquid cooling system, test and analysis of energy saving effect in different environments. Compared to air cooling system,spray liquid cooling system has advantages in six aspects:energy saving/mute/high power density/high performance/environment adaptability/extended life etc. Therefore, it is necessary to research the application specification of spray liquid cooling technology in ITU-T SG5 and make new work item on L.BBU.
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Comment:
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-
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Reference(s):
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Historic references:
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Contact(s):
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| ITU-T A.5 justification(s): |
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First registration in the WP:
2021-06-03 11:45:47
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Last update:
2021-12-13 15:26:34
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