Google 스펙트럼 액세스 시스템 (SAS) 포털의 Google 지도 인터페이스를 사용하여 미국의 스펙트럼 사용 가능 여부를 확인할 수 있습니다. 이 기능에는 동적 보호 구역 (DPA) 이웃 경계와 민간 광대역 무선 서비스 (CBRS) 스펙트럼 사용 가능 여부 히트맵이 포함됩니다.
DPA 주변 지역 경계
DPA 이웃 경계는 CBSD가 DPA 이웃에 있는지 여부를 보여줍니다. DPA 근처의 CBSD는 CBRS 하위 100MHz의 하나 이상의 채널에서 기존 활동으로 인해 주기적으로 부여가 정지될 수 있습니다.
해안 근처에서 CBSD를 운영하는 방법 알아보기
DPA Neighborhood 오버레이를 선택하여 지도에 해당하는 DPA Neighborhood 경계를 표시합니다.
지도에서 CBSD가 DPA 근처 경계 내에 있는지 확인합니다.
CBRS 히트맵
CBRS 히트맵을 사용하면 CBSD를 배포하기 전에 특정 지역에서 사용할 수 있는 채널 수를 파악할 수 있습니다. 히트맵은 배포 전에 일반적인 스펙트럼 가용성을 평가하는 반면, SAS에서 CBSD로 전송하는 스펙트럼 문의 응답은 현재 등록 매개변수에 따라 해당 CBSD에서 사용할 수 있는 채널을 보여줍니다.
CBRS 히트맵은 미국의 3550MHz~3700MHz 대역에서 스펙트럼 가용성을 세부적으로 시각적으로 보여줍니다.
CBRS 히트맵은 다음을 포함한 모든 유형의 Tier 1 (기존 사용자) 활동을 고려합니다.
[[["이해하기 쉬움","easyToUnderstand","thumb-up"],["문제가 해결됨","solvedMyProblem","thumb-up"],["기타","otherUp","thumb-up"]],[["이해하기 어려움","hardToUnderstand","thumb-down"],["잘못된 정보 또는 샘플 코드","incorrectInformationOrSampleCode","thumb-down"],["필요한 정보/샘플이 없음","missingTheInformationSamplesINeed","thumb-down"],["번역 문제","translationIssue","thumb-down"],["기타","otherDown","thumb-down"]],["최종 업데이트: 2025-09-04(UTC)"],[],[],null,["# CBRS spectrum availability\n\nYou can use the Google Maps interface in the Google Spectrum Access System (SAS)\nPortal to understand spectrum availability in the United States. This\nfunctionality includes [Dynamic Protection Area (DPA)](/spectrum-access-system/docs/key-terms#dpa)\nneighborhood borders and Citizens Broadband Radio Service (CBRS) spectrum availability\nheatmaps.\n\nDPA neighborhood borders\n------------------------\n\nDPA neighborhood borders show if your CBSD is in a DPA\nneighborhood. The CBSD in a DPA neighborhood might experience\nperiodic grant suspensions due to incumbent activity on one or several channels\nin the lower 100 MHz of CBRS.\n[Learn how to operate CBSDs near the coast](/spectrum-access-system/docs/cbsd/overview#cbsd-near-coast).\n\nTo check if a CBSD is inside a DPA neighborhood, follow these steps:\n\n1. Go to the [SAS Portal](https://wirelessconnectivity.google.com/sas/welcome).\n2. Select the deployment, and then click **Open**.\n3. Click *map* **Map view** , and then click *layers* **Overlays**.\n4. Select a **DPA Neighborhood** overlay to display the corresponding DPA neighborhood border on the map.\n5. On the map, check if your CBSD falls within the DPA neighborhood border.\n\nCBRS heatmaps\n-------------\n\nCBRS heatmaps help you to determine how many channels are\navailable in an area before you deploy a CBSD. Heatmaps assess\ngeneral spectrum availability before the deployment, while the spectrum inquiry\nresponse from SAS to a CBSD shows which channels\nare available for that CBSD based on its current registration\nparameters.\n\nCBRS heatmaps provide a granular and visual overview of spectrum\navailability from the 3550 MHz to 3700 MHz band in the United States.\n\nCBRS heatmaps account for all types of Tier 1 ([incumbent user](/spectrum-access-system/docs/key-terms#incubment))\nactivity, which includes the following:\n\n- Specialized sensors such as [Environmental Sensing Capability (ESC)](/spectrum-access-system/docs/key-terms#esc) devices\n- In-band DPAs with pending ESCs deployment\n- Out-of-band DPA protection\n- [GB-DPA](/spectrum-access-system/docs/key-terms#gbdpa) protection\n- Fixed satellite service (FSS)\n- US borders\n- Quiet zones, such as the [National Radio Quiet Zone (NRQZ)](/spectrum-access-system/docs/key-terms#nrqz) and the [Federal Communications Commission (FCC)](/spectrum-access-system/docs/key-terms#fcc)\n- Exclusion zones\n- Table mountain\n\nCBRS heatmaps *don't* account for the following activity:\n\n- Temporary channel suspensions due to incumbent activity within in-band DPAs that include [E-DPA](/spectrum-access-system/docs/key-terms#edpa).\n- Interference caused by existing CBSDs.\n\nCBRS heatmaps show the spectrum availability for a CBSD with the\nfollowing configuration:\n\n- Category A CBSD: uses a zero-gain omnidirectional antenna, which is mounted outdoors and five meters above ground.\n- Category B CBSD: has the same characteristics as a Category A\n CBSD but is mounted 25 meters above ground.\n\n | **Note:** In both the categories, the CBSD is supposed to be the first CBSD deployed in the area.\n- Heatmaps are intended as a guide to channel availability. The\n CBSDs that are deployed are not considered in this calculation.\n The spectrum availability might be lower in congested areas where\n SAS protects incumbents.\n\n- Heatmaps show how many full-power 10-MHz channels are available for the first\n CBSD in the area within 48 hours of deployment.\n\nTo find how many channels are available, follow these steps:\n\n1. Go to the [SAS Portal](https://wirelessconnectivity.google.com/sas/welcome).\n2. Select the deployment, and then click **Open**.\n3. Click *map* **Map view** , and then click *layers* **Overlays**.\n4. Select **Spectrum availability (Cat. A)** or **Spectrum availability (Cat. B)**.\n5. On the map, search for a location.\n6. In the **Spectrum availability** section, select the channels that are available within 48 hours.\n\nWhen you click anywhere on the map, it provides the location details such as\nelevation, clutter, height, and spectrum availability for Category A and\nCategory B CBSD.\n\nSpectrum availability information is also provided for every CBSD\nregistered with the SAS Portal. This information represents the\nresult of a real-time spectrum inquiry request for each CBSD. You\ncan view this information on the **Config** tab of the SAS\nPortal."]]
