JP2011151724A - 無線通信装置、無線通信方法、通信制御装置、およびプログラム - Google Patents
無線通信装置、無線通信方法、通信制御装置、およびプログラム Download PDFInfo
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Abstract
【解決手段】無線通信装置は、無線通信の物理/MACレイヤにおける冗長度を示す第1の冗長情報を検出する検出部と、前記検出部により検出された前記第1の冗長情報に基づいて、前記レイヤより上位のレイヤにおける第2の冗長度を決定する通信制御部と、送信データをパケット化してデータパケットを生成するパケタイズ部と、前記通信制御部により決定された前記第2の冗長度に基づいて、前記パケタイズ部により生成されたデータパケットに対して冗長パケットを付加する冗長符号化部とを有する。
【選択図】図2
Description
1.無線通信システムの構成
2.データ送信装置の構成
3.送信処理
4.効果の例
5.データ受信装置の構成
6.受信処理
まず、図1を参照して、本発明の一実施形態に係る無線通信システムの概略構成について説明する。図1は、本発明の一実施形態に係る無線通信システムの概略構成の一例を示す構成図である。
ここで、図4を参照しながら、本実施形態に係るデータ送信装置100の構成について説明する。図4は、本実施形態に係るデータ送信装置100の構成を示す機能ブロック図である。
次に、図5及び図6を参照しながら、データ送信装置100の送信処理について説明する。図5は、パケット送信処理を示すフローチャートである。また図6は、冗長度決定処理を示すフローチャートである。
以上説明したように、本発明の一実施形態に係るデータ送信装置100は、MIMOの信号処理モードがSTBCである場合、すなわち、物理/MACレイヤレベルにおいて冗長化されている場合には、アプリケーション層における冗長化であるFEC符号化における冗長度の算出に、送信に用いられる空間ストリーム数を考慮して、用いられる最大空間ストリーム数が多いほどFEC冗長度を低くする(FEC冗長パケット数を少なくする)。
次に、データ送信装置100から送信されたストリーミングデータを受信するデータ受信装置200の構成について図8を参照しながら説明する。図8は、データ受信装置の構成を示すブロック図である。
次に、このデータ受信装置200におけるデータ受信処理の流れを図9を参照しながら説明する。まず、データ受信装置において、RTP受信部204は、1フレーム分のパケットを取得する(S302)。そして、RTP受信部204は、この受信したパケットがパケットロスを含むか否かを判断する(S304)。
100 データ送信装置
102 エンコーダ
104 パケタイズ部
106 冗長符号化部
108 RTP送信部
110 通信部
112 RTCP通信部
114 検出部
116 記憶部
118 通信制御部
200 データ受信装置
300 ネットワーク
Claims (7)
- 無線通信の物理/MACレイヤにおける冗長度を示す第1の冗長情報を検出する検出部と、
前記検出部により検出された前記第1の冗長情報に基づいて、前記レイヤより上位のレイヤにおける第2の冗長度を決定する通信制御部と、
送信データをパケット化してデータパケットを生成するパケタイズ部と、
前記通信制御部により決定された前記第2の冗長度に基づいて、前記パケタイズ部により生成されたデータパケットに対して冗長パケットを付加する冗長符号化部と、
を備える、無線通信装置。 - 前記検出部は、前記無線通信に用いられる信号処理モードと空間ストリーム数とを含む前記第1の冗長情報を検出し、
前記通信制御部は、前記検出部の検出した前記信号処理モードと前記空間ストリーム数に応じて前記第2の冗長度を決定する、
請求項1に記載の無線通信装置。 - 前記通信制御部は、前記検出部の検出した前記信号処理モードが複数のアンテナで同時に同じデータを送信する信号処理モードである場合に、検出された前記最大空間ストリーム数/前記空間ストリーム数の値が大きいほど前記第2の冗長度が小さくなるように制御を行う、請求項2に記載の無線通信装置。
- 前記第2の冗長度は、前記冗長符号化部において得られる各符号化ブロックにおける元データパケット数と冗長パケット数との比率を示し、
前記通信制御部は、パケットロス率の情報に基づいて、前記パケットロス率をp、前記元データパケット数をk、前記冗長パケット数をn−k、目標符号化ブロック損失率をPt、前記空間ストリームの最大数をMmax、前記空間ストリーム数をMとするときに、前記検出部の検出した前記信号処理モードが複数のアンテナで同時に同じデータを送信する信号処理モードである場合には、
- 無線通信に用いる信号処理モードを切替えて用いることのできる無線通信装置の、
検出部が、前記無線通信の物理/MACレイヤにおける冗長度を示す第1の冗長情報を検出するステップと、
通信制御部が、前記検出部により検出された前記第1の冗長情報に基づいて、前記レイヤより上位のレイヤにおける第2の冗長度を決定するステップと、
パケタイズ部が、送信データをパケット化してデータパケットを生成するステップと、
冗長符号化部が、前記通信制御部により決定された前記第2の冗長度に基づいて、前記パケタイズ部により生成されたデータパケットに対して冗長パケットを付加するステップと、
を含む、無線通信方法。 - 無線通信の物理/MACレイヤにおける冗長度を示す第1の冗長情報を検出する検出部と、
前記検出部により検出された前記第1の冗長情報に基づいて、前記レイヤより上位のレイヤにおける第2の冗長度を決定する通信制御部と、
を備える通信制御装置。 - コンピュータを、
無線通信の物理/MACレイヤにおける冗長度を示す第1の冗長情報を検出する検出部と、
前記検出部により検出された前記第1の冗長情報に基づいて、前記レイヤより上位のレイヤにおける第2の冗長度を決定する通信制御部と、
して機能させるためのプログラム。
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JP2010013193A JP5493910B2 (ja) | 2010-01-25 | 2010-01-25 | 無線通信装置、無線通信方法、通信制御装置、およびプログラム |
US12/930,815 US8670337B2 (en) | 2010-01-25 | 2011-01-18 | Radio communication apparatus, radio communication method, communication control apparatus, and program |
CN2011100099615A CN102137436A (zh) | 2010-01-25 | 2011-01-18 | 无线电通信装置、无线电通信方法、通信控制装置和程序 |
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JP2010013193A JP5493910B2 (ja) | 2010-01-25 | 2010-01-25 | 無線通信装置、無線通信方法、通信制御装置、およびプログラム |
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JP2017118175A (ja) * | 2015-12-21 | 2017-06-29 | 日本放送協会 | 送信装置、受信装置、プログラム、およびチップ |
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US8667144B2 (en) | 2007-07-25 | 2014-03-04 | Qualcomm Incorporated | Wireless architecture for traditional wire based protocol |
US8811294B2 (en) | 2008-04-04 | 2014-08-19 | Qualcomm Incorporated | Apparatus and methods for establishing client-host associations within a wireless network |
US9398089B2 (en) * | 2008-12-11 | 2016-07-19 | Qualcomm Incorporated | Dynamic resource sharing among multiple wireless devices |
US9264248B2 (en) * | 2009-07-02 | 2016-02-16 | Qualcomm Incorporated | System and method for avoiding and resolving conflicts in a wireless mobile display digital interface multicast environment |
US9582238B2 (en) | 2009-12-14 | 2017-02-28 | Qualcomm Incorporated | Decomposed multi-stream (DMS) techniques for video display systems |
US9413803B2 (en) | 2011-01-21 | 2016-08-09 | Qualcomm Incorporated | User input back channel for wireless displays |
US9065876B2 (en) | 2011-01-21 | 2015-06-23 | Qualcomm Incorporated | User input back channel from a wireless sink device to a wireless source device for multi-touch gesture wireless displays |
US9582239B2 (en) | 2011-01-21 | 2017-02-28 | Qualcomm Incorporated | User input back channel for wireless displays |
US9787725B2 (en) | 2011-01-21 | 2017-10-10 | Qualcomm Incorporated | User input back channel for wireless displays |
US10135900B2 (en) | 2011-01-21 | 2018-11-20 | Qualcomm Incorporated | User input back channel for wireless displays |
US8964783B2 (en) | 2011-01-21 | 2015-02-24 | Qualcomm Incorporated | User input back channel for wireless displays |
US10108386B2 (en) | 2011-02-04 | 2018-10-23 | Qualcomm Incorporated | Content provisioning for wireless back channel |
US9503771B2 (en) | 2011-02-04 | 2016-11-22 | Qualcomm Incorporated | Low latency wireless display for graphics |
US8674957B2 (en) | 2011-02-04 | 2014-03-18 | Qualcomm Incorporated | User input device for wireless back channel |
US9525998B2 (en) | 2012-01-06 | 2016-12-20 | Qualcomm Incorporated | Wireless display with multiscreen service |
GB2521441B (en) * | 2013-12-20 | 2016-04-20 | Imagination Tech Ltd | Packet loss mitigation |
CN112333405A (zh) * | 2020-11-18 | 2021-02-05 | 成都致迅科技有限公司 | 一种双频无线图像传输***及方法 |
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US20110182195A1 (en) | 2011-07-28 |
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