JP2007504694A - パケットネットワークのための伝送レートに基づく輻輳制御 - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/637—Control signals issued by the client directed to the server or network components
- H04N21/6377—Control signals issued by the client directed to the server or network components directed to server
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/11—Identifying congestion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/18—End to end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/26—Flow control; Congestion control using explicit feedback to the source, e.g. choke packets
- H04L47/263—Rate modification at the source after receiving feedback
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/28—Flow control; Congestion control in relation to timing considerations
- H04L47/283—Flow control; Congestion control in relation to timing considerations in response to processing delays, e.g. caused by jitter or round trip time [RTT]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/80—Responding to QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/163—In-band adaptation of TCP data exchange; In-band control procedures
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/637—Control signals issued by the client directed to the server or network components
- H04N21/6373—Control signals issued by the client directed to the server or network components for rate control, e.g. request to the server to modify its transmission rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
- H04N21/6437—Real-time Transport Protocol [RTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
- H04N21/64746—Control signals issued by the network directed to the server or the client
- H04N21/64761—Control signals issued by the network directed to the server or the client directed to the server
- H04N21/64769—Control signals issued by the network directed to the server or the client directed to the server for rate control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/65—Transmission of management data between client and server
- H04N21/658—Transmission by the client directed to the server
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/04—Registration at HLR or HSS [Home Subscriber Server]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1101—Session protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
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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
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Computer Security & Cryptography (AREA)
- Databases & Information Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
伝送レートを抑制するとともに、許容バンド幅および損失伝送レートをバンド幅割付ルーチン(The Bandwidth Allocator)に対して通知する伝送レート制御部と、
伝送レート制御部からの許容バンド幅および損失伝送レートを考慮することにより、レイヤ選択部(Layer Selector)および複数のロス・レジリエンス・ブロック(loss resilience blocks)に対して許容バンド幅を割り当てるバンド幅割付ルーチンと、
バンド幅割付ルーチンおよびクライアントのバッファの状態により、割り当てられた許容バンド幅の割合に基づいて、送信するレイヤを選択するレイヤ選択部と、
損失伝送レートおよびバンド幅割付ルーチンにより割り当てられたバンド幅の割合を考慮して、該レイヤ選択部によって選択されたレイヤに冗長データを付加するロス・レジリエンス・ブロックと、
伝送レート制御部に対してフィードバック情報を送ることにより閉ループ制御を構築する受信機と
を有している。
損失伝送レートが高いと、あるいは、バンド幅が狭いと、時間とともに伝搬する映像的な欠陥が現れる。このような映像エンコーダは、パケットの損失伝送レートを補償し、また、許容バンド幅を一致させるために、FECコードの数や伝送された映像の品質を適切に規制することを主要な課題とするような映像配信システムには適していない。
図1には、一般的な映像配信システムが示されている。
図2には、本発明が実行されるシステムが示されている。
図3には、回線の送信側にて実行される伝送レート制御が示されている。
図4には、サーバ側または回線のクライアント側で実行されるバンド幅の推定について示されている。
(I)クイック・プロービング(quick probing)(II)ジェントル・プロービング(gentle probing)
送信側では、ECNにより、または、n(通常は、n=3)回にわたって重複してACKが送られることにより、若しくはフィードバック・レポートが送られることにより、時刻t1において輻輳の発生が通知されると、関数w(t)の値は、時刻t1における関数w(t1)の値から
時刻t1における許容バンド幅、RTTmはラウンドトリップ時間の最小値である。時刻t1+RTTmにおいて、w(t)は再びジェントル・プロービング・フェーズに入る。
12 パケットネットワーク
14 クライアント/サーバ
41 伝送レート制御部
44 受信機
30,32 ルーチン
20 ACKパケット
22 パケット
Claims (17)
- 前記関数w(t)の減少フェーズが、以下のように設定される請求項2に記載の方法;
a)フィードバックされる通知によって、或いは、パケット受信のシーケンスにホールが生ずることに起因して受信側から送信側に対してn回(通常は、n=3)重複して確認応答が送られることにより、時刻t1において輻輳の発生が通知された場合、または明示的輻輳通知により輻輳の発生が通知された場合、関数w(t)は、時刻t1における関数w(t1)から時刻
である。時刻t1+RTTmにおいて、w(t)の設定は、再びジェントル・プロービング・フェーズに入る。
b)送信側が受信側から長い時間にわたり一切のレポートを受信しなかったことによりタイムアウト時間を超過して、タイムアウトが生じ、輻輳の発生が時刻t1において通知された場合、時刻t1における関数w(t)、即ち、関数w(t1)は、2または数個のセグメントで表わさ
プ時間の最小値である。関数w(t)の値が閾値ssthreshに達したときに、関数w(t)は、ジェントル・プロービング・フェーズに入る。 - 前記関数w(t)の減少フェーズが、以下のように設定される請求項2に記載の方法;
a)フィードバックされる通知によって、或いは、パケット受信のシーケンスにホールが生ずることに起因して受信側から送信側に対してn回(通常は、n=3)重複して確認応答が送られることにより、時刻t1において輻輳の発生が通知された場合、または明示的輻輳通知により輻輳の発生が通知された場合、関数w(t)は以下のように設定される。
り、tf=t1+RTTmである。時刻t1+RTTmにおいて、関数w(t)は、再びジェントル・プロービング・フェーズに入る。
b)送信側が受信側から長い時間にわたり一切のレポートを受信しなかったことによりタイムアウト時間を超過して、タイムアウトが生じ、輻輳の発生が時刻t1において通知された場合、時刻t1における関数w(t)、即ち、w(t1)は、2または数個のセグメントで表わされる。
の最小値である。関数w(t)の値が閾値ssthreshに達したときに、関数w(t)は、ジェントル・プロービング・フェーズに入る。 - 伝送制御プロトコルの輻輳制御で実行される請求項1から請求項11のいずれかに記載の方法。
- パケットネットワークを介してデータを送信するためのアプリケーションで実行される請求項1から請求項11のいずれかに記載の方法。
- 音声/映像ストリーミングのためのアプリケーションで実行される請求項1から請求項11のいずれかに記載の方法。
- パケットネットワークを介して行われるリアルタイム会議のためのアプリケーションで実行される請求項1から請求項11のいずれかに記載の方法。
- パケットネットワークを介してファイルを共有するピアツーピアのアプリケーションで実行される請求項1から請求項11のいずれかに記載の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000039A ITBA20030039A1 (it) | 2003-08-29 | 2003-08-29 | Controllo di congestione rate-based del traffico entrante |
PCT/IB2004/002633 WO2005022845A1 (en) | 2003-08-29 | 2004-08-12 | Rate based congestion control for packet networks |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007504694A true JP2007504694A (ja) | 2007-03-01 |
JP2007504694A5 JP2007504694A5 (ja) | 2007-11-01 |
Family
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Application Number | Title | Priority Date | Filing Date |
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JP2006524439A Ceased JP2007504694A (ja) | 2003-08-29 | 2004-08-12 | パケットネットワークのための伝送レートに基づく輻輳制御 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7593335B2 (ja) |
EP (1) | EP1671455A1 (ja) |
JP (1) | JP2007504694A (ja) |
IT (1) | ITBA20030039A1 (ja) |
WO (1) | WO2005022845A1 (ja) |
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WO2005022845A1 (en) | 2005-03-10 |
US20070165524A1 (en) | 2007-07-19 |
EP1671455A1 (en) | 2006-06-21 |
US7593335B2 (en) | 2009-09-22 |
ITBA20030039A1 (it) | 2005-02-28 |
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