JP5084405B2 - ループフリーアドホックルーティングを行なうシステム - Google Patents
ループフリーアドホックルーティングを行なうシステム Download PDFInfo
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- JP5084405B2 JP5084405B2 JP2007229852A JP2007229852A JP5084405B2 JP 5084405 B2 JP5084405 B2 JP 5084405B2 JP 2007229852 A JP2007229852 A JP 2007229852A JP 2007229852 A JP2007229852 A JP 2007229852A JP 5084405 B2 JP5084405 B2 JP 5084405B2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
- H04W40/28—Connectivity information management, e.g. connectivity discovery or connectivity update for reactive routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/18—Loop-free operations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/20—Hop count for routing purposes, e.g. TTL
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/32—Flooding
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
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- Mobile Radio Communication Systems (AREA)
Description
本発明の各実施形態は、分散順序付きシーケンス(DOS:Distributed Ordered Sequence)ルーティグ手順を採用しているため、局所的なルート修復が可能になり、既存ルートへのノード追加が容易になる。DOSには、抽象的なノードラベルのトポロジカルソートを容易にすべく、各宛先に対して一組の分散順序付きシーケンスを含んでいる。一実施形態において、各ノードは整数のラベルまたはシーケンス番号を保持している。DOSは、ルート沿いの各ノードに、後続グラフに関して順序付けられたラベルを保持させることにより、ループフリールーティングを実現する。あるノードのルート沿いの後続子とは、パケットが当該ルートを発信元から宛先へ辿る際に当該ノードに続くノードを指す点に注意されたい。同様に、ノードの先行子とは、ルート沿いにあって当該ノードに先行するノードを指す。
Claims (3)
- 無線ネットワークにおいてループフリーアドホックルーティングを実行するシステムであって、
宛先ノードに対しローカルノードに関連付けられたローカル整数シーケンス番号を告知すべく構成された告知機構と、
発信元ノード、前記宛先ノード、および第1の整数シーケンス番号を指定する第1のルート要求を前記ローカルノードで受信すべく構成された受信機構と、
前記発信元ノード、前記宛先ノード、前記第1の整数シーケンス番号、および前記第1のルート要求を発信したノードを示すレコードを前記ローカルノードに選択的に保持すべく構成された記憶機構と、
前記発信元ノード、前記宛先ノード、および前記第1の整数シーケンス番号より小さく、且つ前記告知されたローカルシーケンス番号以下である第2の整数シーケンス番号を指定する第2のルート要求を、前記受信した第1のルート要求に基づいて選択的に転送すべく構成された転送機構とを含むシステム。 - 前記記憶機構が、前記レコードを前記ローカルノードにおいて選択的に保持しながら、
前記ローカルノードが前記第1のルート要求を以前に受信しているか否かを判定し、
受信していない場合、レコードを生成すべく構成されている、請求項1に記載のシステム。 - 前記第1のルート要求が、第1の有効期間(TTL:Time−To−Live)値を含み、前記システムが更に、
前記第1の有効期間(TTL)値を減らすことにより第2のTTL値を生成し、
前記第2の有効期間(TTL)値が閾値を下回るか否かを判定し、
前記判定の結果が閾値を下回らないときは前記第2の有効期間(TTL)値を前記第2のルート要求に含めるように構成されたTTL計算機構を含む、請求項1に記載のシステム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/517,203 | 2006-09-07 | ||
US11/517,203 US7567547B2 (en) | 2006-09-07 | 2006-09-07 | Method and system for loop-free ad-hoc routing |
Publications (2)
Publication Number | Publication Date |
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JP2008067388A JP2008067388A (ja) | 2008-03-21 |
JP5084405B2 true JP5084405B2 (ja) | 2012-11-28 |
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Application Number | Title | Priority Date | Filing Date |
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JP2007229852A Expired - Fee Related JP5084405B2 (ja) | 2006-09-07 | 2007-09-05 | ループフリーアドホックルーティングを行なうシステム |
Country Status (4)
Country | Link |
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US (1) | US7567547B2 (ja) |
EP (1) | EP1898574B1 (ja) |
JP (1) | JP5084405B2 (ja) |
KR (1) | KR101410701B1 (ja) |
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