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Radio transmit power adjustment based on multiple radio frequency paths and sources of insertion loss

專利號
US10085220B1
公開日期
2018-09-25
申請人
Sprint Spectrum L.P.(US KS Overland Park)
發(fā)明人
Sreekar Marupaduga; Ahmad Saleh
IPC分類
H04L12/50; H04W52/28; H04L12/801; H04W36/06; H04W88/08; H04W88/12
技術領域
rrh,rf,antenna,cell,channels,carrier,site,or,enodeb,carriers
地域: KS KS Overland Park

摘要

Disclosed is a method and system for compensating for excessive attenuation on an RF connection between a remote radio head (RRH) and an antenna of cell site. In an example configuration, in which first and second RF carriers of a cell site traverse different RF paths between respective RRHs and respective antenna, the second RF carrier may be subject to more attenuation than the first. Consequently, antenna transmission power of the second RF carrier may be below one or another threshold. For communication services to user equipment devices that involve both the first and second RF carriers, the diminished antenna transmission power of the second RF carrier may cause service degradation. In accordance with example embodiments, a controlling network entity may determine that the power is diminished, and responsively reallocate transmission power from an underutilized carrier to the second carrier, thereby boosting its transmission power and remediating service degradation.

說明書

While the distributed architecture of the BBU-RRH deployment can help the capacity and services of a cell site keep pace with evolving demand, it can also introduce problems when capabilities and/or design characteristics of incrementally introduced equipment are mismatched. More specifically, there can be a mismatch between the number of ports on an RRH and the number of ports on an antenna or antenna system to which the RRH connects. Adapting a deployment to account for such a mismatch can involve combining signals from two or more ports on the component (RRH or antenna) having the larger number ports so as to reduce the number of connections made on the component having the fewer number of ports, thereby matching the reduced number of connections to the fewer number of ports. Although this approach can address the mismatch in the number of ports on the respective components, hardware elements—e.g., combiners—that combine two or more input signals into a single output signal can produced insertion loss in the communication path between ports of the respective components. Depending on the number of RRHs, the number of antenna systems, and the respective numbers of ports than need to be connected between them, insertion loss between the RRHs and the antenna systems can vary on a per-connection basis depending on how many (if any) combiners are used on each RF path. As a result, different RF paths between RRHs and antennas may be subject to different amounts of attenuation. This, in turn, can become problematic for communication services that concurrently utilize two or more channels that traverse RF paths having disparate attenuation.

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