Radio transmit power adjustment based on multiple radio frequency paths and sources of insertion loss
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
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Unless otherwise indicated herein, the description provided in this section is not itself prior art to the claims and is not admitted to be prior art by inclusion in this section.
A cellular wireless network may include a number of base stations that radiate to define wireless coverage areas in which user equipment devices (UEs) such as cell phones, tablet computers, tracking devices, embedded wireless modules, and other wirelessly equipped communication devices (whether or not technically operated by a human user), can operate. In turn, each base station may be coupled with network infrastructure, including one or more gateways and switches, that provides connectivity with one or more transport networks, such as the public switched telephone network (PSTN) and/or a packet-switched network such as the Internet for instance. With this arrangement, a UE within coverage of the network may engage in air interface communication with a base station and may thereby communicate via the base station with various remote network entities or with other UEs.
權(quán)利要求
We claim:1. In a cell site of a wireless communication system, the cell site including (i) a first remote radio head (RRH) connected by a first radio frequency (RF) path to a first antenna system and (ii) a second RRH connected by a second RF path to a second antenna system, wherein the first RF path supports a first plurality of RF channels for air-interface communications with one or more user equipment device (UEs) via the first antenna system, and the second RF path supports a second plurality of RF channels for air-interface communications with one or more UEs via the second antenna system, a method comprising:making a determination that attenuation of antenna transmission power of a particular channel of the second plurality of RF channels exceeds attenuation of antenna transmission power of a particular channel of the first plurality of RF channels by more than a difference threshold; in response to the determination, identifying one or more other channels of the second plurality of RF channels for which capacity loading for serving UEs is below a utilization threshold; removing the identified one or more other channels from service; and at the second RRH, redistributing transmission power of the removed one or more other channels to the particular channel of the second plurality of RF channels to boost the transmission power of the particular channel of the second plurality of RF channels. 2. The method of claim 1 , wherein the particular channel of the first plurality of RF channels corresponds to a first RF carrier and the particular channel of the second plurality of RF channels corresponds to a different, second RF carrier,wherein the first RF carrier and the second RF carrier are, respectively, primary and secondary carrier components of downlink carrier aggregation for a given UE, and wherein making the determination comprises receiving a reporting message from the given UE indicating that the given UE is detecting the downlink power of the second RF carrier below a detection threshold. 3. The method of claim 1 , wherein the particular channel of the first plurality of RF channels corresponds to a first RF carrier and the particular channel of the second plurality of RF channels corresponds to a different, second RF carrier, the first and second RF carriers being part of a common RF carrier band,and wherein making the determination comprises determining that a rate of handovers of UEs from the second RF carrier to the first RF carrier exceeds a rate threshold. 4. The method of claim 1 , wherein the cell site further comprises a base station server connected to, and controlling both, the first and second RRHs,and wherein identifying the one or more other channels of the second plurality of RF channels for which capacity loading for serving UEs is below the utilization threshold comprises the base station server monitoring capacity loading of at least a subset of the second plurality of RF channels. 5. The method of claim 4 , wherein each of the first plurality of RF channels corresponds to a respective RF carrier of a first plurality of RF carriers, and each of the second plurality of RF channels corresponds to a respective RF carrier of a second plurality of RF carriers,wherein removing the identified one or more other channels from service comprises the base station server directing the second RRH to disable those RF carriers of the second plurality of RF carriers that correspond to the identified one or more channels; and wherein, at the second RRH, redistributing transmission power of the removed one or more other channels to the particular channel of the second plurality of RF channels comprises the base station server directing the second RRH to increase transmission power of a particular RF carrier of the second plurality RF carriers that corresponds to the particular channel of the second plurality of RF channels by applying at least a portion of power previously allocated to the disabled RF carriers. 6. The method of claim 1 , wherein the wireless communication system is configured to operate according to at least Long Term Evolution (LTE) and Code Division Multiple Access (CDMA), and the cell site further comprises an eNodeB and a base station controller (BSC),wherein each of the first plurality of RF channels corresponds to a respective RF carrier of a first plurality of RF carriers, and one or more of the first plurality of RF channels, including the particular RF channel of the first plurality of RF channels, is configured for transmitting according to LTE, wherein each of the second plurality of RF channels corresponds to a respective RF carrier of a second plurality of RF carriers, the second plurality of RF carriers being different than the first plurality of RF carriers, one or more of the second plurality of RF channels, including the particular RF channel of the second plurality of RF channels, is configured for transmitting according to LTE, and one or more of the second plurality of RF channels is configured for transmitting according to CDMA; and wherein identifying the one or more other channels of the second plurality of RF channels for which capacity loading for serving UEs is below the utilization threshold comprises the eNodeB monitoring the capacity loading of one or more of the second plurality of RF channels. 7. The method of claim 6 , wherein the eNodeB monitoring the capacity loading of one or more of the second plurality of RF channels comprises the eNodeB determining the capacity loading of the one or more of the second plurality of RF channels configured for transmitting according to LTE;wherein removing the identified one or more other channels from service comprises the eNodeB directing the second RRH to disable those RF carriers of the second plurality of RF carriers that correspond to the identified one or more channels; and wherein, at the second RRH, redistributing transmission power of the removed one or more other channels to the particular channel of the second plurality of RF channels comprises the eNodeB directing the second RRH to increase transmission power of a particular RF carrier of the second plurality RF carriers that corresponds to the particular channel of the second plurality of RF channels by applying at least a portion of power previously allocated to the disabled RF carriers. 8. The method of claim 6 , wherein the eNodeB monitoring the capacity loading of one or more of the second plurality of RF channels comprises the eNodeB communicating with the BSC to determine the capacity loading of the one or more of the second plurality of RF channels configured for transmitting according to CDMA;wherein removing the identified one or more other channels from service comprises the eNodeB instructing the BSC to direct the second RRH to disable those RF carriers of the second plurality of RF carriers that correspond to the identified one or more channels; and wherein, at the second RRH, redistributing transmission power of the removed one or more other channels to the particular channel of the second plurality of RF channels comprises the eNodeB directing the second RRH to increase transmission power of a particular RF carrier of the second plurality RF carriers that corresponds to the particular channel of the second plurality of RF channels by applying at least a portion of power previously allocated to the disabled RF carriers. 9. A cell site of a wireless communication system, the cell site comprising:a first antenna system; a second antenna system; a first remote radio head (RRH) connected by a first radio frequency (RF) path to the first antenna system, wherein the first RF path supports a first plurality of RF channels for air-interface communications with one or more user equipment device (UEs) via the first antenna system; a second RRH connected by a second RF path to the second antenna system, wherein the second RF path supports a second plurality of RF channels for air-interface communications with one or more UEs via the second antenna system; one or more processors, and memory storing instructions that, when executed by the one or more processors, cause the cell site to carry out operations including: making a determination that attenuation of antenna transmission power of a particular channel of the second plurality of RF channels exceeds attenuation of antenna transmission power of a particular channel of the first plurality of RF channels by more than a difference threshold; in response to the determination, identifying one or more other channels of the second plurality of RF channels for which capacity loading for serving UEs is below a utilization threshold; removing the identified one or more other channels from service; and at the second RRH, redistributing transmission power of the removed one or more other channels to the particular channel of the second plurality of RF channels to boost the transmission power of the particular channel of the second plurality of RF channels. 10. The cell site of claim 9 , wherein the particular channel of the first plurality of RF channels corresponds to a first RF carrier and the particular channel of the second plurality of RF channels corresponds to a different, second RF carrier,wherein the first RF carrier and the second RF carrier are, respectively, primary and secondary carrier components of downlink carrier aggregation for a given UE, and wherein making the determination comprises receiving a reporting message from the given UE indicating that the given UE is detecting the downlink power of the second RF carrier below a detection threshold. 11. The cell site of claim 9 , wherein the particular channel of the first plurality of RF channels corresponds to a first RF carrier and the particular channel of the second plurality of RF channels corresponds to a different, second RF carrier, the first and second RF carriers being part of a common RF carrier band,and wherein making the determination comprises determining that a rate of handovers of UEs from the second RF carrier to the first RF carrier exceeds a rate threshold. 12. The cell site of claim 9 , wherein the cell site further comprises a base station server connected to, and controlling both, the first and second RRHs,and wherein identifying the one or more other channels of the second plurality of RF channels for which capacity loading for serving UEs is below the utilization threshold comprises the base station server monitoring capacity loading of at least a subset of the second plurality of RF channels. 13. The cell site of claim 12 , wherein each of the first plurality of RF channels corresponds to a respective RF carrier of a first plurality of RF carriers, and each of the second plurality of RF channels corresponds to a respective RF carrier of a second plurality of RF carriers,wherein removing the identified one or more other channels from service comprises the base station server directing the second RRH to disable those RF carriers of the second plurality of RF carriers that correspond to the identified one or more channels; and wherein, at the second RRH, redistributing transmission power of the removed one or more other channels to the particular channel of the second plurality of RF channels comprises the base station server directing the second RRH to increase transmission power of a particular RF carrier of the second plurality RF carriers that corresponds to the particular channel of the second plurality of RF channels by applying at least a portion of power previously allocated to the disabled RF carriers. 14. The cell site of claim 9 , wherein the wireless communication system is configured to operate according to at least Long Term Evolution (LTE) and Code Division Multiple Access (CDMA), and the cell site further comprises an eNodeB and a base station controller (BSC),wherein each of the first plurality of RF channels corresponds to a respective RF carrier of a first plurality of RF carriers, and one or more of the first plurality of RF channels, including the particular RF channel of the first plurality of RF channels, is configured for transmitting according to LTE, wherein each of the second plurality of RF channels corresponds to a respective RF carrier of a second plurality of RF carriers, the second plurality of RF carriers being different than the first plurality of RF carriers, one or more of the second plurality of RF channels, including the particular RF channel of the second plurality of RF channels, is configured for transmitting according to LTE, and one or more of the second plurality of RF channels is configured for transmitting according to CDMA; wherein identifying the one or more other channels of the second plurality of RF channels for which capacity loading for serving UEs is below the utilization threshold comprises the eNodeB monitoring the capacity loading of one or more of the second plurality of RF channels; wherein the eNodeB monitoring the capacity loading of one or more of the second plurality of RF channels comprises the eNodeB determining at least one of: the capacity loading of the one or more of the second plurality of RF channels configured for transmitting according to LTE, or the capacity loading reported by the BSC of the one or more of the second plurality of RF channels configured for transmitting according to CDMA; wherein removing the identified one or more other channels from service comprises the eNodeB instructing at least one of: the second RRH to disable those RF carriers of the second plurality of RF carriers that correspond to the identified one or more channels, or the BSC to direct the second RRH to disable those RF carriers of the second plurality of RF carriers that correspond to the identified one or more channels; and wherein, at the second RRH, redistributing transmission power of the removed one or more other channels to the particular channel of the second plurality of RF channels comprises the eNodeB directing the second RRH to increase transmission power of a particular RF carrier of the second plurality RF carriers that corresponds to the particular channel of the second plurality of RF channels by applying at least a portion of power previously allocated to the disabled RF carriers. 15. A base station of a wireless communication system, the base station comprising:a first communication interface to a first remote radio head (RRH) connected by a first radio frequency (RF) path to a first antenna system of a cell site, wherein the first RF path supports a first plurality of RF channels for air-interface communications with one or more user equipment device (UEs) via the first antenna system; a second communication interface to a second RRH connected by a second RF path to a second antenna system of the cell site, wherein the second RF path supports a second plurality of RF channels for air-interface communications with one or more UEs via the second antenna system; one or more processors, and memory storing instructions that, when executed by the one or more processors, cause the base station to carry out operations including: making a determination that attenuation of antenna transmission power of a particular channel of the second plurality of RF channels exceeds attenuation of antenna transmission power of a particular channel of the first plurality of RF channels by more than a difference threshold; in response to the determination, identifying one or more other channels of the second plurality of RF channels for which capacity loading for serving UEs is below a utilization threshold; issuing an instruction to cause the second RRH to remove the identified one or more other channels from service; and instructing the second RRH to redistribute transmission power of the removed one or more other channels to the particular channel of the second plurality of RF channels to boost the transmission power of the particular channel of the second plurality of RF channels. 16. The base station of claim 15 , wherein the particular channel of the first plurality of RF channels corresponds to a first RF carrier and the particular channel of the second plurality of RF channels corresponds to a different, second RF carrier,wherein the first RF carrier and the second RF carrier are, respectively, primary and secondary carrier components of downlink carrier aggregation for a given UE, and wherein making the determination comprises receiving a reporting message from the given UE indicating that the given UE is detecting the downlink power of the second RF carrier below a detection threshold. 17. The base station of claim 15 , wherein the particular channel of the first plurality of RF channels corresponds to a first RF carrier and the particular channel of the second plurality of RF channels corresponds to a different, second RF carrier, the first and second RF carriers being part of a common RF carrier band,and wherein making the determination comprises determining that a rate of handovers of UEs from the second RF carrier to the first RF carrier exceeds a rate threshold. 18. The base station of claim 15 , wherein identifying the one or more other channels of the second plurality of RF channels for which capacity loading for serving UEs is below the utilization threshold comprises monitoring capacity loading of at least a subset of the second plurality of RF channels. 19. The base station of claim 18 , wherein each of the first plurality of RF channels corresponds to a respective RF carrier of a first plurality of RF carriers, and each of the second plurality of RF channels corresponds to a respective RF carrier of a second plurality of RF carriers,wherein issuing an instruction to cause the second RRH to remove the identified one or more other channels from service comprises issuing an instruction to cause the second RRH to disable those RF carriers of the second plurality of RF carriers that correspond to the identified one or more channels; and wherein, instructing the second RRH to redistribute transmission power of the removed one or more other channels to the particular channel of the second plurality of RF channels comprises instructing the second RRH to increase transmission power of a particular RF carrier of the second plurality RF carriers that corresponds to the particular channel of the second plurality of RF channels by applying at least a portion of power previously allocated to the disabled RF carriers. 20. The base station of claim 15 , wherein the wireless communication system is configured to operate according to at least Long Term Evolution (LTE) and Code Division Multiple Access (CDMA), and the base station is an eNodeB,wherein the wireless communication system further comprises a base station controller (BSC), and wherein each of the first plurality of RF channels corresponds to a respective RF carrier of a first plurality of RF carriers, and one or more of the first plurality of RF channels, including the particular RF channel of the first plurality of RF channels, is configured for transmitting according to LTE, wherein each of the second plurality of RF channels corresponds to a respective RF carrier of a second plurality of RF carriers, the second plurality of RF carriers being different than the first plurality of RF carriers, one or more of the second plurality of RF channels, including the particular RF channel of the second plurality of RF channels, is configured for transmitting according to LTE, and one or more of the second plurality of RF channels is configured for transmitting according to CDMA; wherein identifying the one or more other channels of the second plurality of RF channels for which capacity loading for serving UEs is below the utilization threshold comprises the eNodeB monitoring the capacity loading of one or more of the second plurality of RF channels; wherein the eNodeB monitoring the capacity loading of one or more of the second plurality of RF channels comprises the eNodeB determining at least one of: the capacity loading of the one or more of the second plurality of RF channels configured for transmitting according to LTE, or the capacity loading reported by the BSC of the one or more of the second plurality of RF channels configured for transmitting according to CDMA; wherein removing the identified one or more other channels from service comprises the eNodeB instructing at least one of: the second RRH to disable those RF carriers of the second plurality of RF carriers that correspond to the identified one or more channels, or the BSC to direct the second RRH to disable those RF carriers of the second plurality of RF carriers that correspond to the identified one or more channels; and wherein, at the second RRH, redistributing transmission power of the removed one or more other channels to the particular channel of the second plurality of RF channels comprises the eNodeB directing the second RRH to increase transmission power of a particular RF carrier of the second plurality RF carriers that corresponds to the particular channel of the second plurality of RF channels by applying at least a portion of power previously allocated to the disabled RF carriers.
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