JP2004529524A5 - - Google Patents

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JP2004529524A5
JP2004529524A5 JP2002550747A JP2002550747A JP2004529524A5 JP 2004529524 A5 JP2004529524 A5 JP 2004529524A5 JP 2002550747 A JP2002550747 A JP 2002550747A JP 2002550747 A JP2002550747 A JP 2002550747A JP 2004529524 A5 JP2004529524 A5 JP 2004529524A5
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subscriber
cluster
moving
subcarrier
stationary
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JP4213466B2 (en
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Priority claimed from PCT/US2001/048701 external-priority patent/WO2002049385A2/en
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ＯＦＤＭＡシステム内でサブキャリアを割り当てる際に使用する方法において、
少なくとも１つのサブキャリアのダイバーシティクラスタを第１の加入者に割り当てる段階と、
少なくとも１つのコヒーレンスクラスタを第２の加入者に割り当てる段階であって、前記少なくとも１つのダイバーシティクラスタと前記少なくとも１つのコヒーレンスクラスタをそれぞれ同時に使用することによって前記第１及び第２の加入者との通信が生じ得る前記段階と、から成ることを特徴とする方法。 In a method for use in allocating subcarriers in an OFDMA system,
Assigning a diversity cluster of at least one subcarrier to a first subscriber;
Allocating at least one coherence cluster to a second subscriber , wherein the at least one diversity cluster and the at least one coherence cluster are simultaneously used to communicate with the first and second subscribers, respectively. Comprising the steps of: 周波数ホッピングを実行しながら、１つのダイバーシティクラスタを使用して情報を送信する段階を更に含んでいることを特徴とする請求項１に記載の方法。   The method of claim 1, further comprising transmitting information using one diversity cluster while performing frequency hopping. 前記１つのダイバーシティクラスタを使用する段階は、前記１つのダイバーシティクラスタのサブキャリア全体に亘るチャネル符合化段階を含んでいることを特徴とする請求項１に記載の方法。   The method of claim 1, wherein using the one diversity cluster includes channel coding over all subcarriers of the one diversity cluster. 各符号ワードが複数のサブキャリアから送信されたビットを含んでおり、符合ワード間の差ビットは複数のサブキャリアの間で分配されるようになっている符合ワードを送信する段階を更に含んでいることを特徴とする請求項１に記載の方法。   Each codeword includes bits transmitted from a plurality of subcarriers, and the difference bits between the codewords further include transmitting a codeword adapted to be distributed among the plurality of subcarriers. The method according to claim 1, wherein: １つのコヒーレンスクラスタのサブキャリアは、基地局と加入者の間のチャネルのコヒーレンス帯域幅内にあることを特徴とする請求項１に記載の方法。   The method of claim 1, wherein the subcarriers of one coherence cluster are within the coherence bandwidth of the channel between the base station and the subscriber. セル内の移動中の加入者と静止している加入者の人口が変化した時には、クラスタ分類を再構成する段階を更に含んでいることを特徴とする請求項１に記載の方法。   The method of claim 1, further comprising reconfiguring the cluster classification when the population of moving and stationary subscribers in the cell changes. ＯＦＤＭＡシステム内でサブキャリアを割り当てる際に使用するための方法において、
加入者が移動しているか静止しているかを判定する段階と、
前記加入者が移動していると判定された場合は、前記加入者に少なくとも１つのサブキャリアのダイバーシティクラスタを割り当てる段階と、
前記加入者が静止していると判定された場合は、前記加入者に少なくとも１つのサブキャリアのコヒーレンスクラスタを割り当てる段階と、から成ることを特徴とする方法。 In a method for use in allocating subcarriers within an OFDMA system,
Determining whether the subscriber is moving or stationary;
If it is determined that the subscriber is moving, assigning the subscriber a diversity cluster of at least one subcarrier;
Assigning a coherence cluster of at least one subcarrier to the subscriber if it is determined that the subscriber is stationary. 加入者が移動しているか静止しているかを判定する前記段階は、パイロット信号の変化速度を検出する段階と、前記変化速度が事前に設定された量よりも大きい場合には加入者は移動中であると表示する段階と、から成ることを特徴とする請求項７に記載の方法。 The step of determining whether the subscriber is moving or stationary includes detecting the rate of change of the pilot signal, and if the rate of change is greater than a preset amount, the subscriber is moving The method of claim 7 , comprising the step of: 加入者が移動しているか静止しているかを判定する前記段階は、チャネル変動を周期的に測定する段階から成ることを特徴とする請求項７に記載の方法。 The method of claim 7 , wherein said step of determining whether a subscriber is moving or stationary comprises the step of periodically measuring channel variations. 加入者が移動しているか静止しているかを判定する前記段階は、各クラスタ毎にパイロット記号の間のパワー差を測定する段階と、タイムスロットのウインドウに亘って前記差を平均化する段階と、から成ることを特徴とする請求項７に記載の方法。 The step of determining whether a subscriber is moving or stationary includes measuring a power difference between pilot symbols for each cluster and averaging the difference over a window of time slots. The method according to claim 7 , comprising: 前記タイムスロットのウインドウは、タイムスロットの移動ウインドウを備えていることを特徴とする請求項１０に記載の方法。 The method of claim 10 , wherein the time slot window comprises a time slot moving window. 加入者と、
前記加入者と通信可能に接続されており、サブキャリアアロケータと変動検出器とを備えている基地局と、を備え、
前記変動検出器は、チャネル変動を検出するためのものであり、前記サブキャリアアロケータは、前記変動検出器によるチャネル変動検出の結果に基づいて、１つ又は複数のサブキャリアのダイバーシティクラスタか、又は１つ又は複数のサブキャリアのコヒーレンスクラスタの何れかを、前記加入者に割り当てることを特徴とする装置。 With subscribers,
A base station that is communicably connected to the subscriber and comprises a subcarrier allocator and a fluctuation detector ;
The fluctuation detector is for detecting channel fluctuation , and the subcarrier allocator is a diversity cluster of one or more subcarriers based on a result of channel fluctuation detection by the fluctuation detector, or An apparatus for allocating any of one or more subcarrier coherence clusters to the subscriber. 前記変動検出器は、各クラスタ毎にパイロット記号の間のパワー差を測定し、タイムスロットのウインドウに亘って差を平均化することを特徴とする請求項１２に記載の装置。 The apparatus of claim 12 , wherein the variation detector measures a power difference between pilot symbols for each cluster and averages the difference over a window of time slots. 前記タイムスロットのウインドウは、タイムスロットの移動ウインドウを備えていることを特徴とする請求項１３に記載の装置。 14. The apparatus of claim 13 , wherein the time slot window comprises a time slot moving window. ＯＦＤＭＡシステム内でサブキャリアを割り当てる際に使用する装置において、
加入者が移動しているか静止しているかを判定するための手段と、
前記加入者が移動していると判定された場合は、少なくとも１つのサブキャリアのダイバーシティクラスタを前記加入者に割り当てるための手段と、
前記加入者が静止していると判定された場合は、少なくとも１つのサブキャリアのコヒーレンスクラスタを前記加入者に割り当てるための手段と、を備えていることを特徴とする装置。 In an apparatus for use in allocating subcarriers in an OFDMA system,
Means for determining whether the subscriber is moving or stationary;
Means for assigning a diversity cluster of at least one subcarrier to the subscriber if it is determined that the subscriber is moving;
Means for allocating a coherence cluster of at least one subcarrier to the subscriber if it is determined that the subscriber is stationary. 前記第１の加入者と前記第２の加入者の特性を判定する段階を更に備え、前記第１の加入者に割り当てる段階及び前記第２の加入者に割り当てる段階は、前記特性に基づく請求項１に記載の方法。The method further comprises determining characteristics of the first subscriber and the second subscriber, wherein assigning to the first subscriber and assigning to the second subscriber are based on the characteristics. The method according to 1. 前記特性は、前記第１の及び前記第２の加入者が、静止している加入者かどうか、若しくは、移動している加入者かどうか、を備える請求項１６に記載の方法。The method of claim 16, wherein the characteristic comprises whether the first and second subscribers are stationary subscribers or mobile subscribers. 前記第１の若しくは第２の加入者のいずれかへクラスタの割当を適応的に切り替える段階であって、チャネル状態及び加入者特性に基づいて、少なくとも１つのサブキャリアのコヒーレンスクラスタを前記第１の加入者に割り当て、少なくとも１つのサブキャリアのダイバーシティクラスタを前記第２の加入者に割り当てるようにした前記段階を更に備える請求項１に記載の方法。Adaptively switching a cluster assignment to either the first or second subscriber, wherein the coherence cluster of at least one subcarrier is changed to the first based on channel conditions and subscriber characteristics. The method of claim 1, further comprising the step of assigning to a subscriber and assigning a diversity cluster of at least one subcarrier to the second subscriber.
JP2002550747A 2000-12-15 2001-12-13 Multi-carrier communication with adaptive cluster configuration and switching Expired - Fee Related JP4213466B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/738,086 US6947748B2 (en) 2000-12-15 2000-12-15 OFDMA with adaptive subcarrier-cluster configuration and selective loading
US09/837,701 US7146172B2 (en) 2000-12-15 2001-04-17 Multi-carrier communications with adaptive cluster configuration and switching
PCT/US2001/048701 WO2002049385A2 (en) 2000-12-15 2001-12-13 Multi-carrier communications with adaptive cluster configuration and switching

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JP2008193243A Division JP5297111B2 (en) 2000-12-15 2008-07-28 Multi-carrier communication with adaptive cluster configuration and switching

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JP2004529524A5 true JP2004529524A5 (en) 2005-12-22
JP4213466B2 JP4213466B2 (en) 2009-01-21

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CA (1) CA2431502C (en)
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WO (1) WO2002049385A2 (en)

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