KR20030017618A - Ieee 802.11 wlan들을 위한 동적 주파수 선택 체계 - Google Patents
Ieee 802.11 wlan들을 위한 동적 주파수 선택 체계 Download PDFInfo
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- KR20030017618A KR20030017618A KR10-2003-7000450A KR20037000450A KR20030017618A KR 20030017618 A KR20030017618 A KR 20030017618A KR 20037000450 A KR20037000450 A KR 20037000450A KR 20030017618 A KR20030017618 A KR 20030017618A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W36/06—Reselecting a communication resource in the serving access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
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Abstract
Description
| 비트들: 3 | 5 |
| RSSRI | 밀도 |
Claims (24)
- 무선 로컬 영역 네트워크(WLAN)에서 기본 서비스 세트(BSS)의 커버리지 영역 내에 위치된 적어도 하나의 국(STA)과 액세스 포인트(AP) 사이의 통신 채널을 동적으로 선택하기 위한 방법에 있어서,(a) 상기 복수의 STA들에 의해 이용되는 새로운 채널이 요구되는지 여부를 결정하는 단계;(b) 상기 적어도 하나의 STA에 의해 복수의 주파수 채널들의 채널 품질을 측정하는 단계;(c) 상기 복수의 STA들에 의해 측정된 모든 채널들의 CCA(Clear Channel Assessment) 통화중 기간들과 수신된 신호 세기 표시(RSSI)를 포함하는 후보 채널들의 리스트를 상기 복수의 STA들로부터 상기 AP에 보고하는 단계와;(d) 상기 AP와 상기 복수의 STA들 사이의 통신에 이용하기 위한 상기 채널 품질 보고에 기초하여 상기 후보 채널들 중 하나를 선택하는 단계를 포함하는 통신 채널 동적 선택 방법.
- 제 1 항에 있어서,상기 채널 신호 품질은 다른 통신 장치에 의해 야기된 간섭 신호 레벨을 더 포함하고, 상기 간섭 신호 레벨은 온/오프 통화중 CCA 신호들의 주기적인 존재에 기초하는, 통신 채널 동적 선택 방법.
- 제 1 항에 있어서,상기 후보 채널들 중 하나를 선택하는 상기 단계 (d)는 상기 채널 품질에 대한 최소한의 간섭에 기초하거나, 또는 상기 AP와 상기 복수의 STA들 사이의 통신에 이용하기 위한 다른 규정 요구들을 만족하는, 통신 채널 동적 선택 방법.
- 제 1 항에 있어서,상기 후보 채널들 중 하나를 선택하는 상기 단계 (d)는 다른 통신 장치에 최소한의 간섭을 야기하는지 여부에 기초하거나, 또는 다른 규정 요구들을 만족하는, 통신 채널 동적 선택 방법.
- 제 1 항에 있어서,상기 AP에 의해 상기 복수의 STA들에 상기 선택된 채널 정보를 송신하는 단계를 더 포함하는 통신 채널 동적 선택 방법.
- 제 1 항에 있어서,상기 복수의 STA들을 상기 새로운 채널에 스위칭하는 단계를 더 포함하는 통신 채널 동적 선택 방법.
- 무선 로컬 영역 네트워크(WLAN)에서 기본 서비스 세트(BSS)의 커버리지 영역내에 위치된 복수의 국들(STA)과 액세스 포인트(AP) 사이의 통신 채널을 동적으로 선택하기 위한 방법에 있어서,(a) 상기 복수의 무선 STA들에 의해 이용되는 새로운 채널이 요구되는지 여부를 결정하는 단계;(b) 상기 AP에 의해, 채널 품질 측정을 상기 복수의 STA들 중 적어도 하나에 요청하는 단계;(c) 복수의 주파수 채널들의 채널 품질 보고를 상기 적어도 하나의 STA로부터 상기 AP에 송신하는 단계로서, 상기 채널 품질 보고는 상기 복수의 STA들에 의해 측정된 모든 채널들의 CCA(Clear Channel Assessment) 통화중 기간들과 수신된 신호 세기 표시(RSSI)를 포함하는, 상기 송신 단계;(d) 인접한 BSS로부터의 신호가 상기 복수의 STA들에 의해 수신되는지 여부를 결정하는 단계와;(e) 상기 인접한 BSS 신호 또는 알려지지 않은 타입의 간섭 신호들이 검출되면, 상기 채널 품질에 대한 최소한의 간섭에 기초하거나, 상기 RSSI의 값에 따른 상기 복수의 STA들과 상기 AP 사이의 통신에 이용하기 위한 다른 규정 요구를 만족하는 새로운 채널을 선택하는 단계를 포함하는 통신 채널 동적 선택 방법.
- 제 7 항에 있어서,상기 새로운 채널에 관한 정보를 상기 AP로부터 상기 복수의 STA들에 통신하는 단계를 더 포함하는 통신 채널 동적 선택 방법.
- 제 7 항에 있어서,상기 복수의 STA들을 상기 새로운 채널에 스위칭하는 단계를 더 포함하는 통신 채널 동적 선택 방법.
- 제 7 항에 있어서,상기 새로운 채널은 상기 RSSI가 미리 결정된 문턱값을 넘지 않으면 선택되는, 통신 채널 동적 선택 방법.
- 제 7 항에 있어서,다른 통신 장치에 의해 야기된 간섭 신호 레벨이 온/오프 통화중 CCA 신호들의 주기적인 존재에 기초하여 검출되는지 여부를 결정하는 단계와,그렇다면, 상기 채널이 다른 통신 장치에 대한 최소한의 간섭을 야기하는지 여부에 기초하여 상기 새로운 채널을 선택하는 단계를 더 포함하는 통신 채널 동적 선택 방법.
- 제 7 항에 있어서,다음의 조건들, 즉,(1) 상기 BSS가 상기 AP에 의해 형성되고;(2) 상기 AP 또는 상기 STA가 불량한 채널 조건을 경험하고;(3) 상기 BSS가 인접한 BSS로 오버래핑하고;(4) 상기 AP에 의한 상기 STA의 연관이 미리 결정된 시간 기간 보다 더 길지 않으며,(5) 상기 BSS 내의 다른 인가된 오퍼레이터의 검출 중 하나가 발생하면, 상기 새로운 채널이 단계 (a)에서 요구되는지가 결정되는, 통신 채널 동적 선택 방법.
- 무선 로컬 영역 네트워크(WLAN)에서 기본 서비스 세트(BSS)의 커버리지 영역 내에 위치된 복수의 국들(STA들)과 액세스 포인트(AP) 사이의 통신 채널을 동적으로 선택하기 위한 방법에 있어서,(a) 상기 복수의 무선 STA들에 의해 이용되는 새로운 채널이 요구되는지 여부를 결정하는 단계;(b) 인접한 BSS로부터의 신호가 상기 복수의 STA들에 의해수신되는지 여부를 결정하는 단계;(c) 상기 복수의 STA들에 의해 상기 AP에 스캐닝된 모든 상기 채널들의 CCA(Clear Channel Assessment) 통화중 기간들 및 수신된 신호 세기 표시(RSSI)를 측정하는 단계;(d) 온/오프 통화중 CCA 신호들의 주기적인 존재에 기초하여 다른 통신 시스템에 의해 야기된 간섭 레벨을 측정하는 단계와;(e) 상기 측정된 RSSI, CCA, 및 CCA 통화중 신호들의 주기적인 존재에 기초하여 최소한의 간섭 신호 레벨을 나타내는 상기 새로운 채널을 선택하는 단계를 포함하는 통신 채널 동적 선택 방법.
- 제 13 항에 있어서,상기 새로운 채널에 관한 정보를 상기 AP로부터 상기 복수의 STA들에 통신하는 단계를 더 포함하는 통신 채널 동적 선택 방법.
- 제 13 항에 있어서,상기 복수의 STA들을 상기 새로운 채널에 스위칭하는 단계를 더 포함하는 통신 채널 동적 선택 방법.
- 제 13 항에 있어서,다음의 조건들, 즉,(1) 상기 BSS가 상기 AP에 의해 형성되고;(2) 상기 AP 또는 상기 STA가 불량한 채널 조건을 경험하고;(3) 상기 BSS가 인접한 BSS로 오버래핑하고;(4) 상기 AP에 의한 상기 STA의 연관이 미리 결정된 시간 기간보다 더 길지 않으며;(5) 상기 BSS 내의 다른 인가된 오퍼레이터의 검출 중 하나가 발생하면, 상기 새로운 채널이 단계 (a)에서 요구되는지를 결정하는, 통신 채널 동적 선택 방법.
- 무선 로컬 영역 네트워크(WLAN)에서 기본 서비스 세트(BSS)의 커버리지 영역 내에 위치된 복수의 국들(STA)과 액세스 포인트(AP) 사이의 통신 채널을 동적으로 선택하기 위한 시스템에 있어서,상기 복수의 STA들에 의해 이용되는 새로운 채널이 요구되는지 여부를 결정하기 위한 수단;상기 AP에 의해 채널 신호 품질 측정을 상기 복수의 STA들 중 적어도 하나에 요청하기 위한 수단;상기 AP와 상기 복수의 STA들 중 적어도 하나 사이의 복수의 주파수 채널들의 채널 품질 보고를 송신하기 위한 수단으로서, 상기 채널 품질 보고는 상기 복수의 STA들에 의해 측정된 모든 채널들의 CCA(Clear Channel Assessment) 통화중 기간들과 수신된 신호 세기 표시(RSSI)를 포함하는, 상기 송신 수단;인접한 BSS로부터의 신호가 상기 복수의 STA들에 의해 수신되는지 여부를 결정하기 위한 수단과;상기 인접한 BSS 신호가 검출되면, 상기 AP와 상기 복수의 STA들 사이의 통신에 이용하기 위해 상기 채널 품질에 대한 최소한의 간섭에 기초하여 새로운 채널을 선택하기 위한 수단을 포함하는 통신 채널 동적 선택 시스템.
- 제 17 항에 있어서,상기 새로운 채널에 관한 정보를 상기 AP로부터 상기 복수의 STA들에 통신하기 위한 수단을 더 포함하는 통신 채널 동적 선택 시스템.
- 제 17 항에 있어서,상기 복수의 STA들을 상기 새로운 채널에 스위칭하기 위한 수단을 더 포함하는 통신 채널 동적 선택 시스템.
- 제 17 항에 있어서,상기 새로운 채널은 상기 RSSI가 미리 결정된 문턱값을 넘으면 선택되는, 통신 채널 동적 선택 시스템.
- 제 17 항에 있어서,다른 통신 장치에 의해 야기된 간섭 신호 레벨이 미리 결정된 시간 기간에 대해 임의의 802.11 프레임 수신의 주기적인 부재에 기초하여 검출되는지 여부를 결정하기 위한 수단과;상기 채널이 다른 통신 장치에 대한 최소한의 간섭을 야기하는지 여부에 기초하여 상기 새로운 채널을 선택하기 위한 수단을 더 포함하는 통신 채널 동적 선택 시스템.
- 무선 로컬 영역 네트워크(WLAN)에서 기본 서비스 세트(BSS)의 커버리지 영역내에 위치된 복수의 국들(STA)과 액세스 포인트(AP) 사이의 통신 채널을 동적으로 선택하기 위한 시스템에 있어서,컴퓨터-판독 가능한 코드를 저장하기 위한 메모리와;상기 메모리에 동작하게 결합된 프로세서로서,(1) 상기 복수의 무선 STA들에 의해 이용되는 새로운 채널이 요구되는지 여부를 결정하고;(2) 인접한 BSS로부터의 신호가 상기 복수의 STA들에 의해 수신되는지 여부를 결정하고;(3) 상기 복수의 STA들에 의해 상기 AP에 스캐닝된 모든 상기 채널들의 CCA(Clear Channel Assessment) 통화중 기간들 및 수신된 신호 세기 표시(RSSI)를 측정하고;(4) 미리 결정된 시간 기간에 대한 임의의 802.11 프레임 수신의 주기적인 부재에 기초하여 다른 통신 시스템에 의해 야기된 간섭 레벨을 측정하고,(5) 상기 측정된 RSSI, CCA, 및 CCA 통화중 신호들의 주기적인 존재에 기초하여 최소한의 간섭 신호 레벨을 나타내는 상기 새로운 채널을 선택하도록 구성된, 상기 프로세서를 포함하는 통신 채널 동적 선택 시스템.
- 제 22 항에 있어서,상기 프로세서는 상기 새로운 채널에 관한 정보를 상기 AP로부터 상기 복수의 STA들에 통신하도록 또한 구성되는, 통신 채널 동적 선택 시스템.
- 제 22 항에 있어서,상기 프로세서는 상기 복수의 STA들을 상기 새로운 채널에 스위칭하도록 또한 구성되는, 통신 채널 동적 선택 시스템.
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| PCT/IB2002/001574 WO2002093839A2 (en) | 2001-05-11 | 2002-05-06 | DYNAMIC FREQUENCY SELECTION SCHEME FOR IEEE 802.11 WLANs |
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| KR20030017618A true KR20030017618A (ko) | 2003-03-03 |
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| EP (1) | EP1393502A2 (ko) |
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| KR100985387B1 (ko) * | 2008-09-01 | 2010-10-05 | 동국대학교 경주캠퍼스 산학협력단 | 통신환경 내에서 클리어 채널(Clear Channel)을 탐색하는 방법 및 그 시스템. |
| KR101015305B1 (ko) * | 2009-04-16 | 2011-02-15 | 제주대학교 산학협력단 | 신호 전송 장치 및 신호 전송 장치의 제어 신호 전송 방법 |
| US9730247B2 (en) | 2014-06-27 | 2017-08-08 | Techflux, Ltd. | Method and device for uplink transmission |
| US10412763B2 (en) | 2014-06-27 | 2019-09-10 | Techflux, Ltd. | Method and device for uplink transmission in wireless local area network using OFDMA scheme |
| KR20160015633A (ko) * | 2014-07-31 | 2016-02-15 | 주식회사 케이티 | 무선랜의 동작 모드 변경을 이용한 고품질 통화 방법 및 장치 |
| KR20190036961A (ko) * | 2017-09-28 | 2019-04-05 | 엘지전자 주식회사 | 공기조화기 시스템의 제어 방법 |
| US10760811B2 (en) | 2017-09-28 | 2020-09-01 | Lg Electronics Inc. | Method for controlling air conditioner system |
| US10852024B2 (en) | 2017-09-28 | 2020-12-01 | Lg Electronics Inc. | Method for controlling air conditioner system |
| US11109408B2 (en) | 2019-08-16 | 2021-08-31 | Techflux, Inc. | Method and device for uplink transmission |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002093839A2 (en) | 2002-11-21 |
| CN1462523A (zh) | 2003-12-17 |
| WO2002093839A3 (en) | 2003-02-13 |
| US7206840B2 (en) | 2007-04-17 |
| EP1393502A2 (en) | 2004-03-03 |
| US20020188723A1 (en) | 2002-12-12 |
| JP2004520766A (ja) | 2004-07-08 |
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