JP7553457B2 - 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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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、以下に説明するように、本発明による第1の車両によって実行することができる。本方法の第1のステップにおいて、第1の車両は、エリア内に提供される少なくとも1つの通信チャネルのチャネル輻輳(channel congestion)を有することによって定義される臨界エリア(critical area)を予測する。通信チャネルは、好ましくは、例えば、モバイル通信ネットワーク(4G,5G)の基地局またはV2X通信(IEEE802.11p)用の路側機などの、エリア内でモバイル通信サービスを提供する少なくとも1つのアクセスポイントのデータベアラである。
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 トランスポンダ
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 第2の車両
70 バックエンドサーバ
90 路側機
V1 第1の乗用車
V3 第3の乗用車
PL1 第1の隊列
A1 臨界エリア
A2 工事現場
Claims (15)
- チャネル負荷を予測するための第1の車両(10)の方法であって、
少なくとも1つの通信チャネルのチャネル輻輳を伴う臨界エリア(A1)を予測するステップと、
少なくとも1つの第2の車両(63)の進行軌道を決定し、前記少なくとも1つの第2の車両の前記進行軌道と前記臨界エリア(A1)とを比較するステップと、
前記少なくとも1つの第2の車両(63)に対する前記進行軌道と前記臨界エリア(A1)との時空間的な重なりを示す前記比較に基づいて、前記臨界エリアに関する情報を含むメッセージを前記少なくとも1つの第2の車両(63)に選択的に送信するステップと、
を含む、方法。 - 少なくとも1つの通信チャネルの前記チャネル輻輳は、所定の第1の閾値を下回るチャネル品質情報(CQI)および/または所定の第2の閾値を上回るチャネル負荷に対応している、請求項1記載の方法。
- 臨界エリアを予測する前記ステップが、所定数を超える車両を含む高密度エリアを決定するステップを含む、請求項1または2記載の方法。
- 高密度エリアを予測する前記ステップが、複数の第2の車両(63)に関連付けられた交通流データを予測するステップを含む、請求項3記載の方法。
- 前記交通流データは、前記第1の車両(10)のセンサ読み取り値を介して取得された前記第2の車両(63)の軌道情報、または第2の車両(63)によって送信されて前記第1の車両(10)によって受信された少なくとも1つのメッセージから取得された前記第2の車両(63)の軌道情報に基づいている、請求項4記載の方法。
- 前記高密度エリアが、前記第1の車両(10)によって取得された道路情報および/または交通情報に基づいて決定される、請求項3から5までのいずれか1項記載の方法。
- 前記道路情報が、前記第1の車両(10)のセンサ読み取り値によって取得され、かつ/またはエリアに関連する静的情報を含む、請求項6記載の方法。
- 前記交通情報が、前記第1の車両(10)のセンサ読み取り値によって取得され、かつ/または前記第1の車両(10)による少なくとも1つのメッセージから取得され、かつ/またはエリアに関連する動的情報を含む、請求項6または7記載の方法。
- 前記高密度エリアが、地理座標および該地理座標の周囲のエリアによって、かつ/または前記高密度エリアに関連付けられた少なくとも1つの第2の車両(63)の識別子によって定義される、請求項3から8までのいずれか1項記載の方法。
- 臨界エリアを予測する前記ステップが、
エリア内の車両の数を決定するステップと、
前記エリア内に位置する車両(63)ごとの所定のチャネル負荷に基づいて前記エリア内のチャネル負荷を決定するステップと
を含む、請求項1から9までのいずれか1項記載の方法。 - 前記車両ごとのチャネル負荷が、車両クラスおよび/または前記車両(63)のチャネル使用量の履歴に基づいて決定される、請求項1から10までのいずれか1項記載の方法。
- 前記方法が、
少なくとも1つの第2の車両の前記進行軌道が臨界時に前記臨界エリア内に存在することを示すかどうかを判別するステップと、
臨界時に前記臨界エリアに存在する少なくとも1つの第2の車両(63)に前記メッセージを送信するステップと、
臨界時に前記臨界エリアに存在しない少なくとも1つの第2の車両に前記メッセージを送信しないステップと
をさらに含む、請求項1から11までのいずれか1項記載の方法。 - 前記メッセージは、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12までのいずれか1項記載の方法。
- 車両(10)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)の進行軌道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13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)。
- 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13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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