JP2022521404A - チャネル負荷を予測するための方法 - Google Patents
チャネル負荷を予測するための方法 Download PDFInfo
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Abstract
Description
自動車アプリケーションおよびモバイル通信は、特に従来の運転と比較して大量のデータを必要とする自動運転への関心が高まっていることから、ますます関連し合うようになっている。これらのデータ量は、部分的には車両自体によって(つまり、そのセンサによって)提供され、部分的には無線インタフェースを介して提供されている。無線インタフェースを介して、車車間(V2V)通信、または車車間/路車間(V2X)通信が実行されており、後者には路側機(RSU)との通信が含まれている。ここで、V2V通信およびV2X通信は、ポイントツーポイント(ユニキャスト)通信またはポイントツーマルチポイント(マルチキャスト/ブロードキャスト)通信として実行できる。
本開示の一態様によれば、チャネル負荷を予測するための方法が提供され、これは、以下に説明する本発明による車両または以下に説明する本発明による路側機のいずれかによって実行することができる。本方法の第1のステップでは、第1のチャネル品質情報(CQI)が決定され、第1のCQIは、定義された場所に関連付けられ、さらに第1の時点に関連付けられる。第1のCQIは、好ましくは、セルラーネットワークまたはWLANネットワークなどの通信ネットワークのチャネルを介して受信された信号の受信電力の測定値を含む。第1のCQIは、例えば、パケットエラー損失率またはビットエラー率などの、当該通信のエラー率に関する情報をさらに含みうる。第1のチャネル品質情報(CQI)は、さらに、LTE-Aによるサービス品質(QoS)クラス識別子(QCI)、またはチャネル品質インジケータ(CQI)と同様に構成されうるが、かかる実施形態に限定されるものではない。
次に、図面に示されている実施形態を詳細に参照する。例示的な実施形態の効果および特徴は、添付の図面を参照して説明される。ここで、同様の参照番号は同様の要素を示し、冗長な説明は省略されている。しかしながら、本発明は、種々の異なる形態で実施することができものであり、本明細書に例示された実施形態のみに限定されると解釈されるべきではない。むしろ、これらの実施形態は、本発明の態様および特徴を当業者に完全に伝えるための例としてのみ提供されている。
11 第1のセンサ
12 第2のセンサ
13 第3のセンサ
20 通信モジュール
21 メモリ
22 送受信機
30 運転システム
31 メモリ
32 CPU
40 制御ユニット
41 メモリ
42 CPU
51 第4のセンサ
52 第5のセンサ
53 第6のセンサ
61 GPS衛星
62 基地局
63 他の車両
70 バックエンドサーバ
90 路側機
80 第2の通信モジュール
81 トランスポンダ
82,86 内部メモリ
85 第2の制御ユニット
87 CPU
V1 第1の乗用車
V2 第2の乗用車
G1 第1の車両グループ
PL1 第1の隊列
Z1 臨界エリア
Claims (15)
- チャネル負荷を予測するための方法であって、前記方法が、
場所および第1の時点に関連付けられた第1のチャネル品質情報(CQI)を決定するステップと、
前記場所および前記第1の時点に続く第2の時点に関連付けられた交通流データを予測するステップと、
前記第1のCQIおよび予測された前記交通流に基づいて、前記場所および前記第2の時点に関連付けられた第2のCQIを予測するステップと、
前記第2のCQI、前記場所、および前記第2の時点を含むメッセージを、前記第2のCQIに基づいて、少なくとも1つの車両(10,63)に選択的に送信するステップと
を含む、方法。 - 前記場所が、地理座標および該地理座標の周囲の所定のエリアによって定義されている、請求項1記載の方法。
- 前記所定のエリアが、前記メッセージに示されており、かつ/または前記エリアが、前記場所および/または前記第2のCQIに関連付けられた車両(10,63)の軌道および/または識別子に基づいて予め決定されている、請求項2記載の方法。
- 前記交通流データを予測するステップが、前記第1の時点と第2の時点との間の前記エリアに入る車両(10,63)の第1の数を決定するステップと、前記第1の時点と第2の時点との間の前記エリアを離れる車両(10,63)の第2の数を決定するステップとを含む、請求項1から3までのいずれか1項記載の方法。
- 前記交通流データを予測するステップが、センサの読み取り値に基づいてかつ/または協調認識メッセージ(CAM)に基づいて、車両の進行方向および/または速度を決定するステップを含む、請求項1から4までのいずれか1項記載の方法。
- 前記交通流データの前記予測が、前記場所に関連付けられた道路情報および/または交通情報にさらに基づいている、請求項1から5までのいずれか1項記載の方法。
- 前記第2のCQIの前記予測が、前記第2の時点またはその前後の時点において、前記場所またはその周囲の場所に位置する車両(10,63)ごとの所定のチャネル使用量を仮定することを含む、請求項1から6までのいずれか1項記載の方法。
- 前記メッセージが、前記場所の周囲の所定の送信範囲内でブロードキャストされる、請求項1から7までのいずれか1項記載の方法。
- 前記所定の送信範囲が、前記場所に関連付けられた道路クラスに基づいて決定されている、請求項8記載の方法。
- 前記第2のCQIが所定の第1の閾値を超えた場合に前記メッセージが送信され、前記第2のCQIが前記第1の閾値を下回った場合には前記メッセージが送信されない、請求項1から9までのいずれか1項記載の方法。
- 前記方法が、
前記第1のCQIが所定の第1の閾値および第2の閾値のうちのいずれかを超えているかどうかを判別するステップ、
前記第1のCQIが前記第2の閾値を超えたときに、前記交通流データおよび前記第2のCQIを予測するステップ、および/または
前記第1のCQIが前記第1の閾値を超えたときに、前記第1のCQI、前記場所、および前記第1の時点を含むメッセージを、少なくとも1つの車両(10,63)に送信するステップ
をさらに含む、請求項1から10までのいずれか1項記載の方法。 - 前記メッセージが、共有チャネル品質(SCQ)メッセージまたは協調通信メッセージ(CCM)である、請求項1から11までのいずれか1項記載の方法。
- 車両であって、
別の車両(63)および通信ネットワークのステーション(62,70,90)と通信するように構成された通信モジュール(20)と、
別の車両(63)の進行方向および/または速度を検出するための複数の第1のセンサ(11,12,13)と、
請求項1から12までのいずれか1項記載の方法を実行するように構成された制御ユニット(40)と
を含む、車両(10)。 - 路側機(90)であって、
車両(10,63)および通信ネットワークの別のステーション(62,70)と通信するように構成された通信モジュール(80)と、
請求項1から12までのいずれか1項記載の方法を実行するように構成された制御ユニット(85)と、
を含む、路側機(90)。 - 車両の制御ユニットによって実行される際に、前記制御ユニットに請求項1から12までのいずれか1項記載の方法を実行させるための命令を含む、コンピュータプログラム。
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CN113424571A (zh) | 2021-09-21 |
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