JP2007534231A - 非同期通信システム内の衝突を低減させる方法及びシステム - Google Patents
非同期通信システム内の衝突を低減させる方法及びシステム Download PDFInfo
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- JP2007534231A JP2007534231A JP2007503964A JP2007503964A JP2007534231A JP 2007534231 A JP2007534231 A JP 2007534231A JP 2007503964 A JP2007503964 A JP 2007503964A JP 2007503964 A JP2007503964 A JP 2007503964A JP 2007534231 A JP2007534231 A JP 2007534231A
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- 238000004891 communication Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000005540 biological transmission Effects 0.000 claims description 16
- 230000000737 periodic effect Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 10
- 238000004422 calculation algorithm Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000003657 Likelihood-ratio test Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010606 normalization Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
- H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Mobile Radio Communication Systems (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
Description
ここで留意すべきは、プライベート呼用にはプリアンブルが8つ指定されているのに対し、コード呼用にはプリアンブルが4つのみ指定されている為に、同一のプリアンブル番号を共有する可能性が高いのは2人のプライベートユーザより2人のコードユーザだということである。ターゲットが、プライベート呼と、コード呼と、グループ呼とを受け取れる場合、ターゲットは、待機モードでプリアンブルチャネルをスキャンする際に、多数のプリアンブル波形を探すことができる。この実施形態では、ユーザが無数のグループに属することができるので、グループ呼用にはプリアンブルを1つだけ指定すればよい。
より具体的には、第2の発振器336が第2の注入周波数を生み出し、第2の注入周波数は、ミキサ340での中間周波数信号との混合に向けた90度シフトしたものと、ミキサ342での中間周波数信号との混合に向けたシフトされていないものとに定められている。普通I信号及びQ信号と呼ばれる、結果として生じた各ベースバンド信号は、ベースバンドフィルタ346と348のそれぞれにかけられる。受信機302のその各出力、具体的には、ベースバンドフィルタの各出力信号は、図示のようにサンプラー304に供給される。サンプラーには、アナログ・デジタル変換器の350と352とがある。
C1:広帯域の相関メトリック
Pn:Rxの電力(正規化因子)
C2:狭帯域の相関メトリック
これらの量を用いてしきい値テストが行われ、プリアンブル信号が受信されたかどうかを決定する。
C1(m):0≦m≦Np−1のプリアンブルごとの広帯域の相関メトリック
Pn:Rxの電力(正規化因子)
この各量の算出は、先行技術で定められているように、既知のプリアンブル波形の各々の信号テンプレートに基づいてなされる。所望のプリアンブルの検出は、以下の条件のすべてが満たされた場合になされたと判断される。
Claims (10)
- 非同期通信システム内の衝突を低減させる方法であって、
既知のプリアンブル波形の集合を生成する工程であって、前記既知のプリアンブル波形の集合の中で少なくとも1つのプリアンブル波形とプリアンブル波形の残りの集合とが識別可能である前記工程と、
前記既知のプリアンブル波形の集合の中から、呼種別及び受信機識別子との関連に基づいて識別可能なプリアンブル波形の少なくとも1つを送信する工程と、
を含む方法。 - 前記生成する工程が、連続位相の周波数シフトキーイングを用いて、既知の周期的なプリアンブル波形の所定の集合を形成する工程を含み、前記プリアンブル波形の信号群が2種類の周波数の間をトグルするように変調される請求項1に記載の方法。
- 前記生成する工程が、周波数間隔と、前記周波数群がトグルされる際のデューティサイクルと、コードサイズと、のうち、少なくとも1つを動的に又はアプリオリに変える工程を含む請求項2に記載の方法。
- 前記方法が、前記集合の既知のプリアンブル波形すべてについて、受信した信号と送信されるプリアンブル波形のひずみの無い波形との相関を受信機で計算する工程を更に含む請求項1に記載の方法。
- 前記方法が、望ましくないプリアンブルの集合のあらゆるプリアンブルについて、望ましくないプリアンブルと望ましいプリアンブルとの相関の率が所定のしきい値を超えた場合、前記受信した信号を拒否する工程を更に含む請求項4に記載の方法。
- 特定のターゲット受信機を起動させる為にプリアンブル信号を送信するように設けられた無線送信機であって、
既知のプリアンブル波形の集合を生成し、同既知のプリアンブル波形の集合の中に、1つの識別可能プリアンブル波形と残りの波形の集合と、を含む信号発生器と、
呼種別及びターゲット識別子との関連に基づいて、前記プリアンブル波形の集合から、識別可能な少なくとも1つのプリアンブル波形を送信する為に、前記信号発生器に結合されて前記信号発生器に応答する送信装置と、
からなる無線送信機。 - 前記信号発生器が、連続位相の周波数シフトキーイングを用いて、既知の周期的なプリアンブル波形の集合を形成し、同プリアンブル波形の信号群が2種類の周波数をトグルするように変調される請求項6に記載の無線送信機。
- 前記信号発生器が信号源を具備可能であり、前記信号源が、周波数間隔と、前記周波数群がトグルされる際のデューティサイクルと、コードサイズとのうち、少なくとも1つを変えることにより、前記少なくとも1つのプリアンブル波形を変える、請求項7に記載の無線送信機。
- 前記呼種別が、プライベート呼と、コード呼と、グループ呼との中から選択される請求項6に記載の無線送信機。
- 前記送信装置が、前記プリアンブル波形の集合の中の少なくとも1つのプリアンブル波形を複数の所定のキャリア周波数で送信する請求項6に記載の無線送信機。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/803,325 | 2004-03-18 | ||
US10/803,325 US7460624B2 (en) | 2004-03-18 | 2004-03-18 | Method and system of reducing collisions in an asynchronous communication system |
PCT/US2005/007789 WO2005091492A1 (en) | 2004-03-18 | 2005-03-10 | Method and system of reducing collisions in an asynchronous communication system |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007534231A true JP2007534231A (ja) | 2007-11-22 |
JP4976279B2 JP4976279B2 (ja) | 2012-07-18 |
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007503964A Active JP4976279B2 (ja) | 2004-03-18 | 2005-03-10 | 非同期通信システム内の衝突を低減させる方法及びシステム |
Country Status (5)
Country | Link |
---|---|
US (1) | US7460624B2 (ja) |
EP (1) | EP1728318A4 (ja) |
JP (1) | JP4976279B2 (ja) |
KR (1) | KR100841988B1 (ja) |
WO (1) | WO2005091492A1 (ja) |
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US20080304514A1 (en) * | 2007-06-07 | 2008-12-11 | Samsung Electronics Co., Ltd. | Method and apparatus for communicating with a heterogeneous terminal |
US8005091B2 (en) | 2007-07-10 | 2011-08-23 | Qualcomm Incorporated | Apparatus and method of generating and maintaining hybrid connection identifications (IDs) for peer-to-peer wireless networks |
KR20100064358A (ko) * | 2007-10-17 | 2010-06-14 | 호치키 가부시키가이샤 | 통신 시스템 |
US20100195553A1 (en) | 2008-03-18 | 2010-08-05 | Myers Theodore J | Controlling power in a spread spectrum system |
US8477830B2 (en) | 2008-03-18 | 2013-07-02 | On-Ramp Wireless, Inc. | Light monitoring system using a random phase multiple access system |
US8958460B2 (en) | 2008-03-18 | 2015-02-17 | On-Ramp Wireless, Inc. | Forward error correction media access control system |
US8520721B2 (en) | 2008-03-18 | 2013-08-27 | On-Ramp Wireless, Inc. | RSSI measurement mechanism in the presence of pulsed jammers |
KR100931781B1 (ko) * | 2008-04-04 | 2009-12-14 | 엘에스산전 주식회사 | 센서 네트워크의 송신 장치, 수신 장치 및 송수신 시스템 |
US8913672B2 (en) | 2008-09-12 | 2014-12-16 | Qualcomm Incorporated | Efficiently identifying system waveform in uplink transmission |
US8363699B2 (en) | 2009-03-20 | 2013-01-29 | On-Ramp Wireless, Inc. | Random timing offset determination |
KR101015800B1 (ko) * | 2009-11-04 | 2011-02-21 | 서울대학교산학협력단 | Rfid시스템에서 태그 충돌 방지방법 |
MX356850B (es) * | 2013-09-20 | 2018-06-15 | Proteus Digital Health Inc | Métodos, dispositivos y sistemas para recibir y decodificar una señal en presencia de ruido usando segmentos y deformaciones. |
US9648612B2 (en) | 2013-12-23 | 2017-05-09 | At&T Intellectual Property I, L.P. | Method, computer-readable storage device, and apparatus for allocating timeslots on channels in a wireless network |
CN105554903A (zh) * | 2014-11-04 | 2016-05-04 | 北京信威通信技术股份有限公司 | 一种idle态ue迟后进入组呼的方法 |
CN105554708B (zh) * | 2014-11-04 | 2019-02-22 | 北京信威通信技术股份有限公司 | Idle态ue迟后进入组呼的方法、装置和系统 |
EP3556148B1 (en) * | 2016-12-14 | 2022-02-02 | Telefonaktiebolaget LM Ericsson (publ) | Wake-up radio |
JP7142634B2 (ja) | 2016-12-14 | 2022-09-27 | テレフオンアクチーボラゲット エルエム エリクソン(パブル) | 起動信号構築 |
US10490059B2 (en) | 2017-12-15 | 2019-11-26 | Comcast Cable Communications, Llc | Priority-based wireless collision avoidance and interfering device response |
US11552676B2 (en) * | 2020-02-11 | 2023-01-10 | Samsung Electronics Co., Ltd. | Mobile device for performing power line communication and operating method thereof |
EP4020866A1 (en) * | 2020-12-23 | 2022-06-29 | INTEL Corporation | Method for determining of a presence of an identifier within a received signal using a probabilistic detector, and device therefor |
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2005
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- 2005-03-10 KR KR1020067019163A patent/KR100841988B1/ko active IP Right Grant
- 2005-03-10 EP EP05725133A patent/EP1728318A4/en not_active Withdrawn
- 2005-03-10 JP JP2007503964A patent/JP4976279B2/ja active Active
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Also Published As
Publication number | Publication date |
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KR100841988B1 (ko) | 2008-06-27 |
EP1728318A1 (en) | 2006-12-06 |
JP4976279B2 (ja) | 2012-07-18 |
KR20060127204A (ko) | 2006-12-11 |
US20050207383A1 (en) | 2005-09-22 |
EP1728318A4 (en) | 2009-12-23 |
US7460624B2 (en) | 2008-12-02 |
WO2005091492A1 (en) | 2005-09-29 |
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