JP2008502224A - 変更可能な巡回プレフィックス長(cyclicprefixlength)を有する無線通信システム - Google Patents
変更可能な巡回プレフィックス長(cyclicprefixlength)を有する無線通信システム Download PDFInfo
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Abstract
【解決手段】遅延分散の有害な影響を軽減するための手法でデータを送信するために、複数のタイムスロット内に送られるべき複数の伝送のための予測カバレッジエリアが初めに決定される。これらの伝送のための巡回プレフィックス長は予測カバレッジエリアに基づいて選択される。各伝送のための巡回プレフィックス長はこの伝送のための予測カバレッジエリア、この伝送のために使用されたパイロットスタッガリング、等に基づいて1セットの認められた巡回プレフィックス長の中から選択されることができる。例えば、より短い巡回プレフィックス長は各ローカル伝送のために選択されることができ、そしてより長い巡回プレフィックス長は各広域伝送のために選択されることができる。選択された巡回プレフィックス長は端末にシグナリングされることができる。
【選択図】 図9
Description
本特許出願は仮出願番号第60/577,083号、タイトル“FLO−TDD物理層(FLO−TDD Physical layer)”、2004年6月4日提出への優先権を主張し、これについて譲受人に譲渡され、そして引用されて明確にこの中に組み込まれる。
本発明は一般に通信に、そしてより詳しくは無線通信システムにおいてデータを伝送するための技術に関する。
遅延分散の有害な影響を軽減するための手法におけるデータを伝送するための技術がこの中に記述される。これらの技術はいろいろなタイプの伝送(例えば、ユーザ特有の、マルチキャスト、および放送伝送)のために、およびいろいろなサービス(例えば、強化マルチメディア放送/マルチキャストサービス(E−MBMS)のために使用されることができる。
SNRidealは得られた受信エネルギーのすべてを有する最良の場合のSNRである;および
N0はノイズパワーであり、それはN0=2.16×10-13ワットであると仮定される。
Pr(SNRideal≧SNRideal 95%)=0.95、 式(3)
ここでSNRideal 95%はランダム変数SNRidealについての95%カバレッジSNRであり、そしてPr(x)はx発生の確率を表す。
SNR1x 95%≦SNR2x 95%≦SNR3x 95%≦SNRideal 95% 式(4)
4つのランダム変数についての95%カバレッジSNRにおける差は(1)与えられた巡回プレフィックスが十分に長いかどうか、および(2)どんな改善がパイロットスタッガリングにより達成されるかどうかを表示する。
Claims (34)
- 複数のタイムスロット内に送られるべき複数の伝送のための予測カバレッジエリアを決定するための、および、該予測カバレッジエリアに基づいて該複数の伝送のための巡回プレフィックス長を選択するためのコントローラと、そして
該選択された巡回プレフィックス長に基づいて該複数の伝送を処理するための変調器と、
を含む装置。 - 該コントローラは該予測カバレッジエリアを決定し、および所定の持続期間の各タイムインターバル内の該巡回プレフィックス長を選択する、請求項1記載の装置。
- 該コントローラは該複数の伝送のための予測カバレッジエリアに基づいて該複数の伝送の各々のための複数の巡回プレフィックス長の中から1巡回プレフィックス長を選択する請求項1記載の装置。
- 該コントローラは該複数の伝送の各々がローカル伝送または広域伝送のいずれであるかを決定する請求項1記載の装置。
- 該コントローラは該複数の伝送の中の各ローカル伝送のための第1の巡回プレフィックス長を選択し、および該複数の伝送の中の各広域伝送のための第2の巡回プレフィックス長を選択し、ここで該第2の巡回プレフィックス長は該第1の巡回プレフィックス長より長い、
請求項4記載の装置。 - 該コントローラは該複数の伝送とともに送られた周波数分割多重化(FDM)パイロットにさらに基づいて該複数の伝送のための該巡回プレフィックス長を選択する請求項1記載の装置。
- 該コントローラは該予測カバレッジエリアに基づいて複数のスタッガードパイロットの中から1スタッガードパイロットを選択し、そして該変調器は該選択されたスタッガードパイロットをさらに処理する、
請求項1記載の装置。 - 該変調器は該伝送のために選択された巡回プレフィックス長に基づいて複数の伝送の各々のための直交周波数分割多重化(OFDM)記号を発生する請求項1記載の装置。
- 無線通信システムにおけるデータを伝送する方法であって、
複数のタイムスロット内に送られるべき複数の伝送のための予測カバレッジエリアを決定し、
該予測カバレッジエリアに基づいて該複数の伝送のための巡回プレフィックス長を選択し、そして
該選択された巡回プレフィックス長に基づいて該複数の伝送を処理する
ことを含む方法。 - 該予測カバレッジエリアを決定すること、および所定の持続期間の各タイムインターバル内の該巡回プレフィックス長を選択することを実行すること
を含む請求項9記載の方法。 - 該複数の伝送のための該巡回プレフィックス長を選択することは、
該複数の伝送の各々がローカル伝送または広域伝送のいずれであるかを決定し、
該複数の伝送の中の各ローカル伝送のための第1の巡回プレフィックス長を選択し、そして
該複数の伝送の中の各広域伝送のための第2の巡回プレフィックス長を選択することを含み、該第2の巡回プレフィックス長は該第1の巡回プレフィックス長より長い、
請求項9記載の方法 - 該選択された巡回プレフィックス長に基づいて該複数の伝送を該処理することは、
該伝送のために選択された巡回プレフィックス長に基づいて該複数の伝送の各々のための直交周波数分割多重化(OFDM)記号を発生することを含む、
請求項9記載の方法 - 複数のタイムスロット内に送られるべき複数の伝送のための予測カバレッジエリアを決定するための手段と、
該予測カバレッジエリアに基づいて該複数の伝送のための巡回プレフィックス長を選択するための手段と、そして
該選択された巡回プレフィックス長に基づいて該複数の伝送を処理するための手段と
を含む装置。 - さらに該予測カバレッジエリアを決定するおよび所定の持続期間の各タイムインターバル内の該巡回プレフィックス長を選択するための手段を含む請求項13記載の装置。
- 該複数の伝送のための該巡回プレフィックス長を選択するための手段は、
該複数の伝送の各々がローカル伝送または広域伝送のいずれであるかを決定するための手段と、
該複数の伝送の中の各ローカル伝送のための第1の巡回プレフィックス長を選択するための手段と、そして
該複数の伝送の中の各広域伝送のための第2の巡回プレフィックス長を選択するための手段とを含み、該第2の巡回プレフィックス長は該第1の巡回プレフィックス長より長い、
請求項13記載の装置。 - 該選択された巡回プレフィックス長に基づいて該複数の伝送を処理するための手段は、
該伝送のために選択された巡回プレフィックス長に基づいて該複数の伝送の各々のための直交周波数分割多重化(OFDM)記号を発生するための手段を含む
請求項13記載の装置。 - 無線通信システムにおいてデータを伝送する方法であって、
データ伝送のための最大予測遅延分散に基づいて複数の巡回プレフィックス長の中から1データ伝送のための巡回プレフィックス長を選択し、そして
該選択された巡回プレフィックス長に基づいて該データ伝送を処理する、
ことを含む方法。 - さらに該データ伝送の1タイプに基づいて該データ伝送のための該最大予測遅延分散を推定する
ことを含む請求項17記載の方法。 - さらに該データ伝送のための予測カバレッジエリアに基づいて該データ伝送のための該最大予測遅延分散を推定する
ことを含む請求項17記載の方法。 - 該巡回プレフィックス長を該選択することは、
もし該データ伝送がローカル伝送である場合は該複数の巡回プレフィックス長の中から第1の巡回プレフィックス長を選択し、そして
もし該データ伝送が広域伝送である場合は該複数の巡回プレフィックス長の中から第2の巡回プレフィックス長を選択することを含み、該第2の巡回プレフィックス長は該第1の巡回プレフィックス長より長い、
請求項17記載の方法。 - 該選択された巡回プレフィックス長に基づいて該データ伝送を該処理することは、
該選択された巡回プレフィックス長に基づいて該データ伝送のための直交周波数分割多重化(OFDM)記号を発生する
ことを含む請求項17記載の方法。 - さらに該データ伝送を複数の受信器に放送することを含む請求項17記載の方法。
- さらに該データ伝送を特定の受信器に送ることを含む請求項17記載の方法。
- 少なくとも1つのタイムスロット内に送られた少なくとも1つの伝送のために選択された少なくとも1つの巡回プレフィックス長のためのシグナリングを受信するためのコントローラと、ここで、該少なくとも1つの巡回プレフィックス長は該少なくとも1つの伝送のための予測カバレッジエリアに基づいて選択され、そして
該少なくとも1つの巡回プレフィックス長に基づいて該少なくとも1つの伝送を受信しおよび処理する復調器と、
を含む装置。 - ここで該少なくとも1つの伝送の各々はローカル伝送または広域伝送であり、
ここで第1の巡回プレフィックス長は各ローカル伝送のために選択され、
ここで第2の巡回プレフィックス長は各広域伝送のために選択され、そして
ここで該第2の巡回プレフィックス長は該第1の巡回プレフィックス長より長い、
請求項24記載の装置。 - 該コントローラは複数のタイムインターバルの各々の中の該少なくとも1つの巡回プレフィックス長のための該シグナリングを受信し、各タイムインターバルは所定の持続期間を有する、
請求項24記載の装置。 - 該復調器は該少なくとも1つの伝送の各々のための直交周波数分割多重化(OFDM)記号を受信し、そして該伝送のために選択された巡回プレフィックス長に基づいて各伝送のための該受信されたOFDM記号内の巡回プレフィックスを取り除く、
請求項24記載の装置。 - さらに、該少なくとも1つの伝送とともに送信されたスタッガードパイロットを受信するためのおよび該受信されたスタッガードパイロットに基づいてチャネル推定を得るためのチャネル推定器と、そして
該チャネル推定を有する少なくとも1つの伝送上で検出を実行する検出器と、
を含む請求項24記載の装置。 - 無線通信システムにおいてデータを受信する方法であって、
少なくとも1つのタイムスロット内に送られた少なくとも1つの伝送のために選択された少なくとも1つの巡回プレフィックス長のためのシグナリングを受信し、なお該少なくとも1つの巡回プレフィックス長は該少なくとも1つの伝送のための予測カバレッジエリアに基づいて選択され、そして
該少なくとも1つの巡回プレフィックス長に基づいて該少なくとも1つの伝送を処理する
ことを含む方法。 - さらに該少なくとも1つの巡回プレフィックス長のための該シグナリングを該受信すること、そして複数のタイムインターバルの各々の中の該少なくとも1つの伝送を該処理することを実行することを含み、各タイムインターバルは所定の持続期間を有する、
請求項29記載の方法。 - 該少なくとも1つの伝送を該処理することは、
該少なくとも1つの伝送の各々のための直交周波数分割多重化(OFDM)記号を受信し、そして
該伝送のために選択された巡回プレフィックス長に基づいて各伝送のための該受信されたOEDM記号内の巡回プレフィックスを取り除くことを含む、
請求項29記載の方法。 - 少なくとも1つのタイムスロット内に送られた少なくとも1つの伝送のために選択された少なくとも1つの巡回プレフィックス長のためのシグナリングを受信するための手段と、ここで該少なくとも1つの巡回プレフィックス長は該少なくとも1つの伝送のための予測カバレッジエリアに基づいて選択され、そして
該少なくとも1つの巡回プレフィックス長に基づいて該少なくとも1つの伝送を処理するための手段と
を含む装置。 - さらに該少なくとも1つの巡回プレフィックス長のための該シグナリングを受信するための、および複数のタイムインターバルの各々の中の該少なくとも1つの伝送を処理するための手段を含み、各タイムインターバルは所定の持続期間を有する、
請求項32記載の装置。 - 該少なくとも1つの伝送を処理するための該手段は、
該少なくとも1つの伝送の各々のための直交周波数分割多重化(OFDM)記号を受信するための手段と、そして
該伝送のために選択された巡回プレフィックス長に基づいて各伝送のための該受信されたOFDM記号内の巡回プレフィックスを取り除くための手段と
を含む請求項32記載の装置。
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| US57708304P | 2004-06-04 | 2004-06-04 | |
| PCT/US2005/019543 WO2005122517A1 (en) | 2004-06-04 | 2005-06-03 | Wireless communication system with configurable cyclic prefix length |
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| JP2007515609A Withdrawn JP2008502225A (ja) | 2004-06-04 | 2005-06-03 | 多重無線技術を使用する無線通信システムのためのフレーム構造 |
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| JP2010163050A Expired - Lifetime JP5356325B2 (ja) | 2004-06-04 | 2010-07-20 | 変更可能な巡回プレフィックス長(cyclicprefixlength)を有する無線通信システム |
| JP2010250086A Expired - Lifetime JP5269856B2 (ja) | 2004-06-04 | 2010-11-08 | 無線通信システムにおける放送及びマルチキャストサービスのための符号化及び変調 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008502222A (ja) * | 2004-06-04 | 2008-01-24 | クゥアルコム・インコーポレイテッド | 無線通信システムにおけるブロードキャストおよびマルチキャストのサービスのためのオーバヘッド情報の伝送 |
| US7920884B2 (en) | 2004-06-04 | 2011-04-05 | Qualcomm Incorporated | Frame structures for a wireless communication system with multiple radio technologies |
| US8089855B2 (en) | 2004-06-04 | 2012-01-03 | Qualcomm Incorporated | Transmission of overhead information for broadcast and multicast services in a wireless communication system |
| US8577299B2 (en) | 2004-06-04 | 2013-11-05 | Qualcomm Incorporated | Wireless communication system with configurable cyclic prefix length |
| US8582596B2 (en) | 2004-06-04 | 2013-11-12 | Qualcomm Incorporated | Coding and modulation for broadcast and multicast services in a wireless communication system |
| US8588203B2 (en) | 2004-06-04 | 2013-11-19 | Qualcomm Incorporated | Wireless communication system with improved broadcast coverage |
| US8265183B2 (en) | 2004-12-14 | 2012-09-11 | Fujitsu Limited | Radio communication apparatus and communication method |
| JP2012178873A (ja) * | 2007-01-10 | 2012-09-13 | Nec Corp | Ofdm通信システムにおけるmbmsの送信方法 |
| JP2012528513A (ja) * | 2009-05-29 | 2012-11-12 | パンテック カンパニー リミテッド | 差分巡回遅延ダイバーシティmimo方式を用いた送受信装置及びその方法 |
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