JP7315580B2 - 統合された大容量データ及びワイヤレス・ネットワーク・サービスのための装置及び方法 - Google Patents
統合された大容量データ及びワイヤレス・ネットワーク・サービスのための装置及び方法 Download PDFInfo
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Description
ネットワーク事業者は、様々な異なるデバイスを使用してデータ・サービス(たとえば、ブロードバンド)及びビデオ・プロダクトを顧客に配信し、それにより、そのユーザ又は加入者が、いくつかの異なるコンテキスト、固定(たとえば、その居住地において)とモバイル(移動しながら、又は家から離れてなど)の両方において、データ/コンテンツにアクセスすることを可能にする。図1及び図2は、そのようなデータ・サービスをそのユーザ及び加入者に提供するために使用される、一般的な従来技術の管理された(たとえば、ケーブル)コンテンツ配信ネットワーク・アーキテクチャを示す機能ブロック図である。
代替的に、ネットワーク内でサービスを提供するために、いわゆる「オーバーザトップ」又はOTT配信が使用され得、ネットワーク事業者と提携しないことがあるサード・パーティ・ソースからのコンテンツが、ネットワーク事業者の(上記で説明されたケーブル・アーキテクチャを含む)インフラストラクチャを介して、たとえば、IPベース・トランスポートを介して、要求側ユーザ又は加入者に直接コンテンツを提供し、すなわち、コンテンツは、よく知られているインターネット・プロトコル・ネットワークレイヤ・プロトコルに従って、上述の高スピードDOCSISケーブル・モデムなどを介して、ユーザのネットワーク又はIPアドレスに基づいて要求側ユーザへの配信のためにパケット化され、ルーティングされる。
動作及び経済的効率を獲得するために、HFCベース・ケーブル・ネットワークなどのコンテンツ配信ネットワーク内の技術スタックが、時間とともに、概して、ネットワークの「クラウド」又はネットワーク側に向かって(たとえば、地域ごとに分けられたデータ・センターに)、及びエンド・ユーザ(クライアント)消費デバイスから離れて、移行した。したがって、クライアント・デバイスのコンテンツ・プレゼンテーション能力が、ますます、クライアント・デバイスのオンボード・ストレージ及び処理能力並びにクライアント・デバイスの関連するソフトウェア・スタックとともに、(ネットワーク側キャッシュ・アーキテクチャを含む)これらのクラウドベース機能によって決められる。
無線アクセス技術(「RAT:Radio Access Technology」)としても知られる、多数のワイヤレス・ネットワーキング技術は、無線ベース・通信ネットワークのための接続の基礎をなす手段をユーザ・デバイスに提供する。そのようなRATは、しばしば、認可無線周波数スペクトル(すなわち、委員会の規則のセクション2.106において成文化された、周波数割振りの表に従ってFCCによって割り振られた無線周波数スペクトル)を利用する。現在、9kHzから275GHzの間の周波数帯域のみが割り振られている(すなわち、1つ又は複数の地上波又は空間無線通信サービス、或いは特定の条件下の電波天文学サービスによる使用のために指定されている)。たとえば、一般的なセルラー・サービス・プロバイダは、以下の表1に示されているように、いわゆる「3G」(第3世代)及び「4G」(第4世代)ワイヤレス通信のためのスペクトルを利用し得る。
NG-RAN又は「NextGen RAN(無線エリア・ネットワーク)」は、3GPP「5G」次世代無線システムの一部である。3GPPは、現在、リリース15 NG-RANと、それの構成要素と、いわゆる「gNB」(次世代ノードB又はeNB)を含む関与するノードの間の対話とを指定している。NG-RANは、超高帯域幅、超低レイテンシ(たとえば、1ms又はそれ以下の「ラウンド・トリップ」程度)ワイヤレス通信を提供し、適用例に応じて、屋内「スポット」使用、都市「マクロ」(ラージ・セル)カバレージ、地方カバレージ、車両における使用、並びに「スマート」グリッド及び構造を含む、多種多様な展開シナリオにおいて、上記で説明されたタイプの認可スペクトルと無認可スペクトルの両方を効率的に利用することになる。NG-RANはまた、4G/4.5Gシステム及びインフラストラクチャと統合することになり、その上、新しいLTEエンティティが使用される(たとえば、EPC(発展型パケット・コア)とNR「NGC」(次世代コア(Next Generation Core))の両方への接続性をサポートする「発展型」LTE eNB又は「eLTE eNB」。
現存する4/4.5G(たとえば、LTE/LTE-A)及びWLAN(及び他の無認可)システム、並びに上記で概説された対応するIoTソリューションによってもたらされるワイヤレス・データ・レート、ロバストネス、及びカバレージにおける大きい進歩があっても、依然として、大きな障害が存在する。
例示的な一態様では、本開示は、とりわけ、既存の管理されたネットワーク(たとえば、ケーブル・ネットワーク)インフラストラクチャを活用する、拡張超高データ・レート・サービスを提供するための改善されたアーキテクチャ、方法及び装置を提供する。開示されるアーキテクチャは、コンテンツが消費され、固定ブロードバンドとモバイル・ブロードバンドとを、又は上記とIoTとを区別する必要をなくす、環境(たとえば、屋内/屋外/モビリティ)にかかわらず高度に均一なユーザ・エクスペリエンスを可能にする。
次に、本開示の装置及び方法の例示的な実施例が、詳細に説明される。これらの例示的な実施例は、サービス・プロバイダ(たとえば、MSO)の管理されたネットワークに関連する、又はそのネットワークによって少なくとも部分的にサポートされる、前述のワイヤレス・アクセス・ノード(たとえば、gNB)のコンテキストにおいて説明されるが、他のタイプの無線アクセス技術(「RAT」)、デジタル・データ(たとえば、テキスト、画像、ゲーム、ソフトウェア・アプリケーション、ビデオ及び/又はオーディオ)を配信するように構成された他のタイプのネットワーク及びアーキテクチャが、本開示に従って使用され得る。そのような他のネットワーク又はアーキテクチャは、ブロードバンド、ナローバンド、又はそれ以外であり得、したがって、以下は、本質的に例にすぎない。
次に図5を参照すると、拡張サービス・プロバイダ・ネットワーク・アーキテクチャ500の一実施例が詳細に図示及び説明される。
1.アクセス及びモビリティ管理機能(AMF:Access and Mobility Management function)。NASシグナリングの終了と、NAS完全性保護及びサイファ化と、登録及び接続及びモビリティ管理と、アクセス認証及び許可と、セキュリティ・コンテキスト管理とを提供する。AMFは、従来の発展型パケット・コア(EPC)のMME機能性の部分に類似する機能を有する。
2.アプリケーション機能(AF:Application Function)。トラフィック・ルーティングに対するアプリケーション影響、NEFにアクセスすること、ポリシー制御のためのポリシー・フレームワークとの対話を管理する。NR AFは、EPCにおけるAFに相当する。
3.認証サーバ機能(AUSF:Authentication Server Function)。認証サーバ機能性を提供する。AUSFは、EPCからのHSSの部分と同様である。
4.ネットワーク露出機能(NEF:Network Exposure function)。能力及びイベントの露出、外部アプリケーションから3GPPネットワークへの情報のセキュアな提供、内部/外部情報の変換を管理する。NEFは、EPCと比較してまったく新しいエンティティである。
5.ネットワーク・スライス選択機能(NSSF:Network Slice Selection Function)。UEをサービスするためのネットワーク・スライス・インスタンスの選択、可能にされるNSSAIを決定すること、UEをサービスするために使用されるべきAMFセットを決定することを提供する。NSSFは、EPCと比較してまったく新しいエンティティである。
6.NFリポジトリ機能(NRF:NF Repository function)。サービス発見機能をサポートし、NFプロファイルと利用可能なNFインスタンスとを維持する。NRFは、EPCと比較してまったく新しいエンティティである。
7.ポリシー制御機能(PCF:Policy Control Function)。統一されたポリシー・フレームワークを提供し、CP機能に対するポリシー・ルールと、UDRにおけるポリシー判断のためのアクセス・サブスクリプション情報とを提供する。PCFは、EPCからのPCRF機能性の部分を有する。
8.セッション管理機能(SMF:Session Management function)。セッション管理(セッション確立、修正、解放)、UEのためのIPアドレス割振り及び管理、DHCP機能、セッション管理に関係するNASシグナリングの終了、DLデータ通知、適切なトラフィック・ルーティングのためのUPFについてのトラフィック・ステアリング構成を提供する。SMFは、EPCからのMME及びPGW機能性の部分を含む。
9.統一データ管理(UDM:Unified Data Management)。認証及び鍵一致(AKA:Authentication and Key Agreement)証明の生成、ユーザ識別ハンドリング、アクセス許可、サブスクリプション管理をサポートする。これは、EPCからのHSS機能性の部分を備える。
10.ユーザ・プレーン機能(UPF:User plane function)。UPFは、パケット・ルーティング及びフォワーディング、パケット検査、QoSハンドリングを提供し、また、データ・ネットワーク(DN:Data Network)への相互接続の外部PDUセッション・ポイントとして働く。UPFはまた、RAT内モビリティとRAT間モビリティとのためのアンカー・ポイントとして働き得る。UPFは、EPCからの従来のSGW及びPGW機能性の一部を含む。
- AMF識別子(AMF ID:AMF Identifier)は、AMF(アクセス及びモビリティ管理機能)を識別するために使用され、
- NRセル・グローバル識別子(NCGI:NR Cell Global Identifier)は、NRセルをグローバルに識別するために使用され、セルが属するPLMN識別情報とセルのNRセル識別情報(NCI:NR Cell Identity)とから構築され、
- gNB識別子(gNB ID:gNB Identifier)は、PLMN内のgNBを識別するために使用され、それのセルのNCI内に含まれ、
- gNBをグローバルに識別するために使用され、gNBが属するPLMN識別情報とgNB IDとから構築される、グローバルgNB ID、
- トラッキング・エリアを識別するために使用され、トラッキング・エリアが属するPLMN識別情報とトラッキング・エリアのTAC(トラッキング・エリア・コード(Tracking Area Code))とから構築される、トラッキング・エリア識別情報(TAI:Tracking Area identity)、
- ネットワーク・スライスを識別するために使用される、シングル・ネットワーク・スライス選択支援情報(S-NSSAI:Single Network Slice Selection Assistance information)。
したがって、どんなデータがMSO又はそれの顧客にとって有用であるかに応じて、上記の様々な部分は、特定のgNB「クライアント」、又は、MSOネットワークによってバックホール化されるそれらの構成要素に関連付けられ、記憶され得る。
図5のコンテキストでは、本明細書で説明されるDUeは、拡張CPE(CPEe)513及び無線ノード506a(たとえば、柱取り付け外部デバイス)に対して任意の数の形式及び機能を仮定し得る。概して、「DU」及び「CU」が3GPP規格化特徴及び機能を指すことを認識すると、これらの特徴及び機能は、図5のアーキテクチャ500においてサポートされる限り、無数のやり方及び/又はロケーションで実装され得る。その上、(本明細書でCUe及びDUeと呼ばれる)これらの構成要素の拡張及び/又は延長、並びに本開示によって提供されるそれらの機能は、同様に、アーキテクチャ500全体にわたる様々なノード及びロケーションにおいて分散され得、図示されたロケーション及び配置は例示的なものにすぎない。
- オプション1(RRC/PCDPスプリット)
- オプション2(PDCP/RLCスプリット)
- オプション3(イントラRLCスプリット)
- オプション4(RLC-MACスプリット)
- オプション5(イントラMACスプリット)
- オプション6(MAC-PHYスプリット)
- オプション7(イントラPHYスプリット)
- オプション8(PHY-RFスプリット)
を含み得る。
図6a及び図6bは、図5のHFCケーブル・プラント内の距離の関数としての、例示的なダウンストリーム(DS)及びアップストリーム(US)データ・スループット又はレートを示す。図示のように、10Gbps程度の総(DSとUSとを組み合わせた)帯域幅が、(本出願の譲受人によって行われるコンピュータ化シミュレーションに基づいて)2100フィート(640m)におけるノード+2において、及び1475フィート(450m)におけるノード+1において達成可能である。前述の10Gbpsの1つの例示的なスプリットは、非対称、たとえば、8Gbps DL/2Gbps ULであるが、これは、本明細書の他の場所で説明されるように、たとえば、TDD変動を使用して動的に変動させられ得る。
ここで、
Rt=総ライン抵抗オーム/304.8メートル(1000フィート)
p=誘電体の電力ファクタ(power factor)
F=メガヘルツ(MHz)単位の周波数
0.5E-03s(対称US/DSを仮定する)×(0.7×3E08m/s)×1km/1000m
=1.05E02km
図7及び図7aは、本開示による、ネットワーク無線周波数ノード装置509の例示的な構成を示す。上記で参照されたように、これらのノード509は、とりわけ、現存するHFC(及び光)インフラストラクチャ、並びにCUe504などの他の4G/5G構成要素との最も効率的な統合を容易にするように、(i)MSOの物理的にセキュアな空間などにおいて、他のMSO機器とコロケートされること、(ii)「ストランド」又は柱取り付け、(iii)表面取り付け、及び(iv)埋め込まれることを含む、任意の数のフォーム・ファクタをとることができる。
図8は、本開示によるCPEe装置513の例示的な構成を示す。図示のように、CPEe513は、概して、HFC分散ネットワーク(すなわち、構内における同軸ドロップ)へのRF入力インターフェース816。概して、前に説明されたノード509の送信機/受信機と対称の送信機/受信機アーキテクチャが使用され、すなわち、インピーダンス整合回路要素、ダイプレクサ、同期回路、チルトなどが、CPEe RFフロント・エンドの一部として使用される。ブロック・コンバータ810は、以下でより詳細に説明される、構内ドメインに対する同軸ケーブル・ドメイン帯域(ここで、50~850及び850~1650MHz)に及びそれからコンバートするために使用される。
アーキテクチャ500のさらなる実施例では、補足又は相補データ・リンク902が、図9aに示されているように、追加のデータ容量(及び機器又は他の障害の場合の1次リンクへの冗長性)を提供するために利用される。この構成では、21Gbps程度のデータ・レートが、本出願の譲受人によるコンピュータ・モデリング、たとえば、17Gbps DS及び4Gbps USに基づいて達成され得る。補足リンクは、一変形態では、柱取り付け又は他の外部無線アクセス・ノード506aと、(一実施例では、追加されたアンテナ能力516をもつCPEe513を含む、構内トランシーバとの間の5G NRワイヤレス・インターフェースを含む。本コンテキストで使用される「柱取り付け」及び「外部」という用語は、限定はしないが、たとえば、CPEeの補足アンテナ516(たとえば、屋上又は屋外アンテナ)との接続又はデータ接続性を確立することができる、任意の取り付け配置又はロケーションを指す。そのような取り付けは、屋外であるか、又は大きい構造(たとえば、スポーツ・スタジアム、大きい建築物集合体内であり得、いくつかの実装形態では、一時的又は半永続的であり得るにすぎない。
本開示の別の態様では、たとえば、オフィス・ビル、企業、大学など、広い屋内空間に、高データ・レート、低レイテンシ及び高モビリティの統一されたカバレージを提供するためのアーキテクチャが開示される。図11に示されているように、このアーキテクチャの一実装形態は、HFCインフラストラクチャを介して企業などの内部に1つ又は複数のCPEe513を供給するために、上記のハブ505及び(図5に示されているアクセス・ノード509及びCUe504を含む)CUeノード501を利用する。CPEeは、その場合、たとえば、図示のような構造内のカバレージを提供する屋内(又は屋内/屋外)DAS1102に接続される。CPEe513はまた、4G/5G能力をもつローカル柱取り付けアクセス・ノードなどを介して、構造/企業に提供される帯域幅、並びに屋内/屋外モビリティを補足するために、前に説明された補足アンテナ能力を利用し得る。
次に、図12~図12cを参照すると、たとえば、本明細書の図5のネットワーク・インフラストラクチャを動作させる方法が、図示及び説明される。
Claims (22)
- 統合されたワイヤレス・データ・サービスを配信するために現存するインフラストラクチャが使用されるように、無線周波数(RF)ネットワークを動作させるコンピュータ化された方法であって、前記方法は、
少なくとも、前記現存するインフラストラクチャの通常動作帯域よりも周波数が広い周波数帯域を使用して、前記現存するインフラストラクチャの少なくとも一部分上でOFDM(直交周波数分割多重)波形が送信されるステップであって、前記周波数帯域は、ユーザ周波数帯域よりも周波数が低い、ステップと、
少なくとも1つのコンピュータ化された構内デバイスを介して、前記送信されたOFDM波形を受信するステップと、
アップコンバートされた波形を形成するために、前記受信されたOFDM波形を前記ユーザ周波数帯域にアップコンバートするステップと、
前記アップコンバートされた波形を少なくとも1つのコンピュータ化されたユーザ・デバイスに送信するステップと
を含む、コンピュータ化された方法。 - 前記現存するインフラストラクチャが、ハイブリッド・ファイバー同軸(HFC)インフラストラクチャを備え、前記統合されたワイヤレス・データ・サービスが、1Gbpsを超過するレートにおけるデータ配信を備える、請求項1に記載のコンピュータ化された方法。
- 前記現存するインフラストラクチャの通常動作帯域よりも周波数が広い前記周波数帯域は、総帯域幅が少なくとも1.6GHzの周波数帯域を備える、請求項2に記載のコンピュータ化された方法。
- 総帯域幅が少なくとも1.6GHzの前記周波数帯域を2つ又はそれ以上のサブバンドに割り振るステップをさらに含む、請求項3に記載のコンピュータ化された方法。
- 総帯域幅が少なくとも1.6GHzの前記周波数帯域を前記2つ又はそれ以上のサブバンドに前記割り振るステップが、広帯域増幅器装置を使用して割り振るステップを含む、請求項4に記載のコンピュータ化された方法。
- 前記割り振るステップが、1つ又は複数の現存するHFCネットワーク・ハブへの前記2つ又はそれ以上のサブバンドを介してデータを配信することをさらに含む、請求項4に記載のコンピュータ化された方法。
- 前記受信されたOFDM波形を前記ユーザ周波数帯域に前記アップコンバートするステップが、5GHzを含む周波数帯域にアップコンバートするステップを含む、請求項1に記載のコンピュータ化された方法。
- 前記アップコンバートされた波形を前記少なくとも1つのコンピュータ化されたユーザ・デバイスに前記送信するステップが、無認可無線周波数帯域において、少なくとも3GPP(3rd Generation Partnership Project)第5世代(5G)新無線(NR)準拠エア・インターフェースを使用して送信するステップを含む、請求項1に記載のコンピュータ化された方法。
- 前記現存するインフラストラクチャの少なくとも一部分上でOFDM(直交周波数分割多重)波形が前記送信されるステップが、少なくとも同軸ケーブル上で、及び前記同軸ケーブルに結合された複数の増幅器段を介して前記OFDM波形が送信されるステップを含む、請求項1に記載のコンピュータ化された方法。
- 前記送信されたOFDM波形を受信するステップは、前記少なくとも1つのコンピュータ化された構内デバイスから前記現存するインフラストラクチャ内のネットワーク・コアに向かうアップストリームに配置されたコンピュータ化されたネットワーク・エンティティから前記送信されたOFDM波形を受信することを含む、請求項1に記載のコンピュータ化された方法。
- 前記少なくとも1つのコンピュータ化された構内デバイスから前記現存するインフラストラクチャ内のネットワーク・コアに向かうアップストリームに配置されたコンピュータ化されたネットワーク・エンティティから前記送信されたOFDM波形を受信することは、少なくともハイブリッド・ファイバー同軸(HFC)インフラストラクチャの同軸ケーブル・インフラストラクチャを介して、前記送信されたOFDM波形を受信することを含む、請求項1に記載のコンピュータ化された方法。
- コンテンツ配信ネットワークの現存するインフラストラクチャを介して、統合されたデータ・サービスの配信のために使用されるコンピュータ化された構内装置であって、該コンピュータ化された構内装置は、
デジタル処理装置と、
前記デジタル処理装置とデータ通信を行う無線周波数装置と、
前記デジタル処理装置とデータ通信を行う記憶装置であって、前記デジタル処理装置上で実行されると、前記コンピュータ化された構内装置に
少なくとも1つのユーザ・デバイスに配信するために、3GPP(Third Generation Partnership Project)LTE(Long Term Evolution)又は5G NR(Fifth Generation New Radio)無線規格のうちの少なくとも1つに準拠する1つ又は複数のOFDM(直交周波数分割多重)波形を処理することであって、少なくとも、前記現存するインフラストラクチャの通常動作帯域よりも周波数が広くユーザ周波数帯域よりも周波数が低い周波数帯域を使用して、前記現存するインフラストラクチャの少なくとも一部分上で前記1つ又は複数のOFDM波形が受信される、前記処理すること、及び
前記少なくとも1つのユーザ・デバイスに処理された前記波形を送信すること
を実行させるように構成された少なくとも一つのコンピュータ・プログラムを含む、前記記憶装置と、
を含む、コンピュータ化された構内装置。 - 前記現存するインフラストラクチャの通常動作帯域よりも周波数が広い周波数帯域は、前記現存するインフラストラクチャが統合されていないデータ・サービスのために使用されるとき、前記現存するネットワーク・インフラストラクチャの規定された動作帯域よりも周波数が広い周波数帯域を含み、
受信された前記波形の処理は、少なくとも一部が前記周波数帯域の一部よりも周波数が高いユーザ周波数帯域への前記波形のアップコンバージョンを含む、請求項12に記載のコンピュータ化された構内装置。 - 処理された前記波形の前記送信は、無線周波数(RF)スペクトルの無認可の部分を介した送信を含む、請求項12に記載のコンピュータ化された構内装置。
- 前記コンテンツ配信ネットワークの前記現存するインフラストラクチャは、同軸ケーブル・ベアラを含み、
前記1つ又は複数の波形の前記受信は、TDD(time division duplex)多重を使用する受信を含む、請求項12に記載のコンピュータ化された構内装置。 - 前記同軸ケーブル・ベアラは、第1の周波数帯域内で動作するように構成され、受信された前記1つ又は複数の波形は、前記第1の周波数帯域の上に延長する周波数帯域を介して少なくとも一部が受信される、請求項15に記載のコンピュータ化された構内装置。
- 前記1つ又は複数の波形は、3GPP 5G NR gNB(gNodeB)制御ユニット(CU)プロセスによって少なくとも部分的に制御される3GPP(3rd Generation Partnership Project)第5世代新無線(5G NR) gNB(gNodeB)配信ユニット(DU)プロセスから、前記現存するインフラストラクチャを介して、前記コンピュータ化された構内装置によって受信される、請求項12に記載のコンピュータ化された構内装置。
- 非一時的記憶媒体を含むコンピュータ可読装置であって、前記非一時的記憶媒体は、複数の命令を有する少なくとも1つのコンピュータ・プログラムを含み、前記複数の命令は、処理装置上で実行されるとき、コンピュータ化された構内装置に
現存するネットワーク・インフラストラクチャ内のコンピュータ化された構内装置からアップストリームに配置された3GPP(Third Generation Partnership Project)5G NR(Fifth Generation New Radio)に準拠するノード装置から送信された1つ又は複数のOFDM(直交周波数分割多重)波形を受信することであって、少なくとも前記現存するインフラストラクチャの通常動作帯域よりも周波数が広くユーザ周波数帯域よりも周波数が低い周波数帯域の使用を含む、前記1つ又は複数のOFDM波形を受信すること、
少なくとも1つのコンピュータ化されたユーザ・デバイスへの送信のために、3GPP LTE(Long Term Evolution)又は5G NR無線規格のうちの少なくとも1つに基づいて、前記1つ又は複数のOFDM(直交周波数分割多重)波形を処理することであって、前記1つ又は複数のOFDM波形の前記処理は、アップコンバートされた波形を形成するための前記ユーザ周波数帯域に対して受信された前記1つ又は複数のOFDM波形のアップコンバージョンを含む、処理すること、及び
前記少なくとも1つのコンピュータ化されたユーザ・デバイスに処理された前記波形を送信すること
を実行させるように構成されている、コンピュータ可読装置。 - 前記ノード装置は、少なくともネットワーク5G NR CU(controller unit)によって制御される3GPP 5G NR DU(distributed unit)を含み、
前記1つ又は複数のOFDM波形の前記受信は、各々異なる周波数の複数のキャリア上で変調された前記1つ又は複数のOFDM波形の受信を含む、請求項18に記載のコンピュータ可読装置。 - 前記通常動作帯域の一部ではないより広い前記周波数帯域の一部は、800MHzよりも上に配置された部分を含む、請求項19に記載のコンピュータ可読装置。
- 前記1つ又は複数のOFDM波形の前記受信は、少なくとも現存する同軸ケーブル・インフラストラクチャ上の前記1つ又は複数のOFDM波形の受信と、少なくとも前記現存するネットワーク・インフラストラクチャの前記通常動作帯域よりも周波数が広い周波数帯域で動作するようにそれぞれ設計された複数の増幅器装置の使用を含む、請求項18に記載のコンピュータ可読装置。
- 前記1つ又は複数のOFDM波形の前記受信は、3GPP(Third Generation Partnership Project)に準拠する4G(Fourth Generation)又は5G(Fifth Generation)波形の受信を含む、請求項18に記載のコンピュータ可読装置。
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