JP2017153116A - 無線通信システムで拡張アクセス遮断適用方法及び装置 - Google Patents
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Abstract
【解決手段】より詳しくはマシンタイプ通信(Machine Type Communication、MTC)をサポートする端末がネットワークにアクセスを試みる時、アクセス可能であるか否かを判定して判定結果によってネットワークにアクセスを試みる詳細手続きに対して提案する。本発明によればネットワークにアクセスする端末の作動を制御してネットワークへの過度なアクセスを制御することができる。
【選択図】図4
Description
前記MTC端末を処理するために、LTEリリース10(リリースはバージョン情報を意味し、高いほど最新バージョンである)では端末がアクセスを試みる時のアクセスリクエストメッセージに「MTC端末としてアクセスをリクエストする」と基地局に通知することによって、基地局が以後、端末のアクセスリクエストを承認するか、或いは拒絶と同時にその後にアクセス試みが可能であるかなどを通知することができる。
また、本発明の他の目的は、ネットワークへのアクセスが遮断されないMTC端末がランダムアクセス手続き実行中、ランダムアクセス応答メッセージに含まれたバックオフを処理する方法及び装置を提供することをその目的とする。
この時、MTC端末と言っても以下の場合には前記EABを適用しない:
“Tbarring”=(0.7+0.6* rand) * ac−BarringTime
“Tbarring”=(0.7+0.6* rand)* ac−BarringTime
n+ m * 7
810・910 制御部
815・920 マルチプレクサー及びデマルチプレクサー
820・825・925・930 上位階層装置
830・935 制御メッセージ処理部
915 スケジューラー
Claims (12)
- 無線通信システムで端末のアクセス制御方法であって、
RRC(Radio Resource Control)連結を確立するように前記端末の第1レイヤーが、前記端末の第2レイヤーに要求する段階と、
前記端末に拡張アクセス制限(Extended Access Barring)が設定された場合、特定ケースを除いたRRC連結要請に対しては、前記EABを適用することを前記端末の第2レイヤーに指示する段階とを含み、
前記特定ケースは、RRC確立の原因が前記端末のMT(mobile terminating)アクセスのためのものを含むことを特徴とする方法。 - 前記特定ケースは、RRC連結確立の原因が緊急コールのためのもの、またはアクセスクラス(AC)が11から15のうちの1つである端末がネットワークにアクセスする場合を含むことを特徴とする、請求項1に記載の方法。
- 前記EABが前記RRC連結に対する要求に適用されることを前記端末の前記第1レイヤーが指示する場合、セルに対するアクセスが前記EABによって遮断されるか否かを、前記端末の前記第2レイヤーによって判断する段階と、
前記セルに対するアクセスが前記EABによって遮断される場合、前記端末の前記第1レイヤーに対する前記RRC連結の失敗を、前記端末の前記第2レイヤーによって通知する段階とをさらに含むことを特徴とする、請求項1に記載の方法。 - 前記セルに対するアクセスが前記EABによって遮断されるか否かを判断する段階は、
基地局から受信した第1システム情報ブロックがEABパラメータを含む場合、前記EABパラメータに含まれるEABカテゴリに前記端末のカテゴリが属し、アクセスクラス(AC)が11から15を除く範囲に属する場合、セルに対するアクセスが遮断されたと判定することを特徴とする、請求項3に記載の方法。 - 基地局から受信した第2システム情報ブロックがアクセスクラス遮断パラメータを含む場合、アクセス遮断判定を行う段階をさらに含むことを特徴とする、請求項1に記載の方法。
- 前記アクセス遮断判定を行う段階は、
前記端末が第1範囲の値のうち、一つ以上のアクセスクラスを有する場合、遮断されないセルに対するアクセスが前記端末に有効であるか否かを判定する段階と、
前記端末が前記第1範囲の値のうち、一つ以上のアクセスクラスを有しない場合、0から1の範囲に同一に分布する乱数を生成する段階と、
前記乱数が前記アクセスクラス遮断パラメータによって表わす値よりも小さい場合、遮断されないセルにアクセスするか否かを判定し、前記乱数が前記アクセスクラス遮断パラメータによって表わす値よりも小さくない場合、遮断されたセルにアクセスするか否かを判定する段階を含むことを特徴とする、請求項5に記載の方法。 - 無線通信システムでの端末であって、
信号を送受信する送受信部と、
RRC(Radio Resource Control)連結を確立するように前記端末の第1レイヤーが前記端末の第2レイヤーに要求し、前記端末に拡張アクセス制限(Extended Access Barring)が設定された場合、特定ケースを除いたRRC連結要請に対して、前記EABを適用することを前記端末の第2レイヤーに指示する制御部とを含み、
前記特定ケースは、RRC確立の原因が前記端末のMT(mobile terminating)アクセスのためのものを含むことを特徴とする端末。 - 前記特定ケースは、RRC連結確立の原因が緊急コールのためのもの、又はアクセスクラス(AC)が11から15のうちの一つである端末がネットワークにアクセスする場合を含むことを特徴とする、請求項7に記載の端末。
- 前記制御部は、
前記EABが前記RRC連結に対する要求に適用されることを前記端末の前記第1レイヤーが指示する場合、セルに対するアクセスが前記EABによって遮断されるか否かを判断し、
前記セルに対するアクセスが前記EABによって遮断される場合、前記端末の前記第1レイヤーに対する前記RRC連結の失敗を通知することを特徴とする、請求項8に記載の端末。 - 前記制御部は、
基地局から受信した第1システム情報ブロックがEABパラメータを含む場合、前記EABパラメータに含まれるEABカテゴリに前記端末のカテゴリが属し、前記アクセスクラス(AC)が11から15を除く範囲に属する場合、セルに対するアクセスが遮断されたと判定することを特徴とする、請求項9に記載の端末。 - 前記制御部は、
基地局から受信した第2システム情報ブロックがアクセスクラス遮断パラメータを含む場合、アクセス遮断判定を行うことを特徴とする、請求項7に記載の端末。 - 前記制御部は、
前記端末が第1範囲の値のうち、一つ以上のアクセスクラスを有する場合、遮断されないセルに対するアクセスが前記端末に有効か否かを判定し、
前記端末が前記第1範囲の値のうち、一つ以上のアクセスクラスを有しない場合、0から1の範囲に同一の分布する乱数を生成し、
前記乱数が前記アクセスクラス遮断パラメータによって表わす値よりも小さい場合、遮断されないセルにアクセスするか否かを判定し、前記乱数が前記アクセスクラス遮断パラメータによって表わす値よりも小さくない場合、遮断されたセルにアクセスするか否かを判定することを特徴とする、請求項11に記載の端末。
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USRE49136E1 (en) | 2022-07-12 |
CN107277741A (zh) | 2017-10-20 |
US10123252B2 (en) | 2018-11-06 |
JP6486987B2 (ja) | 2019-03-20 |
US20160014673A1 (en) | 2016-01-14 |
US20160014672A1 (en) | 2016-01-14 |
CN107277741B (zh) | 2020-08-18 |
JP6618105B2 (ja) | 2019-12-11 |
EP2742616A2 (en) | 2014-06-18 |
CN103748811A (zh) | 2014-04-23 |
RU2605437C2 (ru) | 2016-12-20 |
KR102161831B1 (ko) | 2020-10-05 |
US9084074B2 (en) | 2015-07-14 |
US20150271740A1 (en) | 2015-09-24 |
WO2013022298A3 (en) | 2013-04-04 |
US10123253B2 (en) | 2018-11-06 |
CN103748811B (zh) | 2017-05-03 |
US20130040597A1 (en) | 2013-02-14 |
EP2742616A4 (en) | 2016-01-06 |
WO2013022298A2 (en) | 2013-02-14 |
EP2742616B1 (en) | 2019-10-02 |
KR20190038783A (ko) | 2019-04-09 |
EP3618316A1 (en) | 2020-03-04 |
EP3618316B1 (en) | 2022-03-02 |
AU2012295045A1 (en) | 2014-01-30 |
RU2014104354A (ru) | 2015-08-20 |
US10123254B2 (en) | 2018-11-06 |
AU2012295045B2 (en) | 2016-09-22 |
JP2014527351A (ja) | 2014-10-09 |
KR101967721B1 (ko) | 2019-04-10 |
KR20130018139A (ko) | 2013-02-20 |
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