Physical random access channel (prach) transmission in multicarrier operation
Abstract
Systems and methods that facilitate the selection of uplink carriers for random access within a wireless environment with multiple carriers are described. The choice of uplink carriers for random access can be randomly selected from the set of available uplink carriers. In addition, uplink carriers for random access can be selected based on which uplink carrier is paired with the anchor carrier. In addition, uplink carriers for random access can be identified based on the bandwidth associated with the user equipment (UE). Reference signals can also be applied to identify the uplink carrier performing random access.

Term
Projected expiry 11 September 2029.
- Priority
- Filed
- Published
- Today
- Projected expiry
73 claims: 15 independent, 58 dependent
- 1マルチ・キャリア無線環境内でランダム・アクセスを実行することを容易にする無線通信の方法であって、 複数のアップリンク・キャリアから、ランダム・アクセスのためにユーザ機器(UE)によって使用されるべきアップリンク・キャリアを決定することと、 前記決定されたアップリンク・キャリアによってランダム・アクセスを実行することとを備える方法。
- 2前記アップリンク・キャリアを決定することはさらに、 複数のダウンリンク・キャリアからダウンリンク・アンカ・キャリアを決定することと、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記ダウンリンク・アンカ・キャリアに対応するアップリンク・キャリアを選択することとを備える請求項1に記載の方法。
- 3前記アップリンク・キャリアを決定することはさらに、 前記UEが同期され、前記UEがシステム情報のうちの少なくとも一部を受信するダウンリンク・キャリアに、前記UEがキャンプされるダウンリンク・キャリアを決定することと、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記ダウンリンク・キャリアに対応するアップリンク・キャリアを選択することとを備える請求項1に記載の方法。
- 4前記アップリンク・キャリアを決定することはさらに、ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記UEがランダム・アクセス・パラメータを知っている複数のアップリンク・キャリアのうちの1つをランダムに選択することを備える請求項1に記載の方法。
- 5前記アップリンク・キャリアを決定することはさらに、 前記UEの帯域幅能力に基づいて、1または複数のアップリンク・キャリアのセットを判定することと、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記1または複数のアップリンク・キャリアのセットから、アップリンク・キャリアを選択することとを備える請求項1に記載の方法。
- 6前記ランダム・アクセスを実行することはさらに、 基地局へランダム・アクセス・プリアンブルを送信することと、 アップリンク許可を備えるランダム・アクセス応答を前記基地局から受信することと、 前記アップリンク許可にしたがって、スケジュールされた送信を、前記基地局へ送ることとを備える請求項1に記載の方法。
- 7干渉除去されたリソースで、検出可能なセルから、基準信号を受信することと、 前記検出可能なセルための基準信号測定値を取得することとをさらに備える請求項1に記載の方法。
- 8前記ランダム・アクセスを実行することはさらに、 前記基準信号測定値を第1のセルへ送信することと、 前記基準信号測定値に基づいて選択された第2のセルを特定するメッセージを受信することと、 前記第2のセルにアクセスすることとを備える請求項7に記載の方法。
- 9前記第2のセルへアクセスすることはさらに、 前記受信したメッセージから、前記第2のセルのシステム情報を取得することと、 前記システム情報に基づいて、前記第2のセルにアクセスすることとを備える請求項8に記載の方法。
- 10前記アップリンク・キャリアを決定することはさらに、前記基準信号測定値に基づいて、ランダム・アクセスのためのアップリンク・キャリアおよびセルを選択することを備え、 前記ランダム・アクセスを実行することはさらに、前記選択されたアップリンク・キャリアによって、前記選択されたセルへのランダム・アクセスを実行することを備える請求項7に記載の方法。
- 11前記アップリンク・キャリアおよびセルを選択することはさらに、前記検出可能なセルの負荷情報にさらに基づいて、前記アップリンク・キャリアおよびセルを選択することを備える請求項10に記載の方法。
- 12前記ランダム・アクセスを実行することはさらに、近隣のセルからの干渉除去されたアップリンク・リソースで、ランダム・アクセス・プリアンブルを送信することを備える請求項1に記載の方法。
- 13前記ランダム・アクセスが不成功である場合、 前記複数のアップリンク・キャリアから、別のアップリンク・キャリアを選択することと、 前記別のアップリンク・キャリアによってランダム・アクセスを実行することとをさらに備える請求項1に記載の方法。
- 14前記ランダム・アクセスを実行することはさらに、 少なくとも1つのダウンリンク(DL)キャリアのおのおのについて、物理ランダム・アクセス・チャネル(PRACH)パラメータのセットを特定することと、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、獲得されたダウンリンク・キャリアに対応するアップリンク・キャリアを選択することと、 ランダム・アクセスを実行するために、前記UEによって特定および使用されたPRACHパラメータのセットに基づいて、前記UEによって獲得されたダウンリンク・キャリアを基地局が特定できるようにする、対応するPRACHパラメータを用いて、前記選択されたアップリンク・キャリアにおけるランダム・アクセスを実行することと、 前記獲得されたダウンリンク・キャリアでランダム・アクセス応答を受信することとを備える請求項1に記載の方法。
- 15前記獲得されたDLキャリアはダウンリンク・アンカ・キャリアである請求項14に記載の方法。
- 16前記PRACHパラメータのセットに基づいて、特定のラジオ・フレーム、前記ラジオ・フレーム内のサブフレーム、および周波数領域における物理リソース・ブロックのうちの少なくとも1つを特定することをさらに備える請求項14に記載の方法。
- 17前記ランダム・アクセスを実行することはさらに、 少なくとも1つのDLキャリアのおのおのを用いて、物理ランダム・アクセス・チャンネル(PRACH)パラメータのセットを特定することと、 前記少なくとも1つのダウンリンク・キャリアから、ダウンリンク・アンカ・キャリアを決定することと、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記ダウンリンク・アンカ・キャリアに対応するアップリンク・キャリアを選択することと、 前記対応するPRACHパラメータを用いて、前記選択されたアップリンク・キャリアで前記ランダム・アクセスを実行することと、 前記特定されたPRACHパラメータのセットに基づいて、基地局が、前記ダウンリンク・アンカ・キャリアを特定できるようにすることと、 前記ダウンリンク・アンカ・キャリアでランダム・アクセス応答を受信することとを備える請求項1に記載の方法。
- 18無線通信装置であって、 複数のアップリンク・キャリアから、ランダム・アクセスのためにユーザ機器(UE)によって使用されるべきアップリンク・キャリアを決定し、前記決定されたアップリンク・キャリアによってランダム・アクセスを実行するように構成された少なくとも1つのプロセッサと、 前記少なくとも1つのプロセッサに接続されたメモリとを備える無線通信装置。
- 19複数のダウンリンク・キャリアからダウンリンク・アンカ・キャリアを決定し、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記ダウンリンク・アンカ・キャリアに対応するアップリンク・キャリアを選択するように構成された少なくとも1つのプロセッサをさらに備える請求項18に記載の無線通信装置。
- 20前記UEが同期され、前記UEがシステム情報のうちの一部を受信するダウンリンク・キャリアに、前記UEがキャンプされるダウンリンク・キャリアを決定し、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記ダウンリンク・キャリアに対応するアップリンク・キャリアを選択するように構成された少なくとも1つのプロセッサをさらに備える請求項18に記載の無線通信装置。
- 21ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記UEがランダム・アクセス・パラメータを知っている複数のアップリンク・キャリアのうちの1つをランダムに選択するように構成された少なくとも1つのプロセッサをさらに備える請求項18に記載の無線通信装置。
- 22前記UEの帯域幅能力に基づいて、1または複数のアップリンク・キャリアのセットを判定し、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記1または複数のアップリンク・キャリアのセットから、アップリンク・キャリアを選択するように構成された少なくとも1つのプロセッサをさらに備える請求項18に記載の無線通信装置。
- 23ランダム・アクセスのためのアップリンク・キャリアを選択する無線通信装置であって、 複数のアップリンク・キャリアから、ランダム・アクセスのためにユーザ機器(UE)によって使用されるべきアップリンク・キャリアを決定する手段と、 前記決定されたアップリンク・キャリアによってランダム・アクセスを実行する手段とを備える無線通信装置。
- 24前記アップリンク・キャリアを決定する手段はさらに、 複数のダウンリンク・キャリアからダウンリンク・アンカ・キャリアを決定する手段と、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記ダウンリンク・アンカ・キャリアに対応するアップリンク・キャリアを選択する手段とを備える請求項23に記載の無線通信装置。
- 25前記アップリンク・キャリアを決定する手段はさらに、 前記UEが同期され、前記UEがシステム情報のうちの少なくとも一部を受信するダウンリンク・キャリアに、前記UEがキャンプされるダウンリンク・キャリアを決定する手段と、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記ダウンリンク・キャリアに対応するアップリンク・キャリアを選択する手段と備える請求項23に記載の無線通信装置。
- 26前記アップリンク・キャリアを決定する手段はさらに、ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記UEがランダム・アクセス・パラメータを知っている複数のアップリンク・キャリアのうちの1つをランダムに選択することを備える請求項23に記載の無線通信装置。
- 27前記アップリンク・キャリアを決定する手段はさらに、 前記UEの帯域幅能力に基づいて、1または複数のアップリンク・キャリアのセットを判定する手段と、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記1または複数のアップリンク・キャリアのセットから、アップリンク・キャリアを選択する手段と備える請求項23に記載の無線通信装置。
- 28前記ランダム・アクセスを実行する手段はさらに、 基地局へランダム・アクセス・プリアンブルを送信する手段と、 アップリンク許可を備えるランダム・アクセス応答を前記基地局から受信する手段と、 前記アップリンク許可にしたがって、スケジュールされた送信を、前記基地局へ送る手段とを備える請求項23に記載の無線通信装置。
- 29検出可能なセルから基準信号を受信する手段と、 前記検出可能なセルための基準信号測定値を取得する手段とをさらに備える請求項23に記載の無線通信装置。
- 30前記検出可能なセルからの基準信号は、干渉除去されたリソースにある請求項29に記載の無線通信装置。
- 31前記ランダム・アクセスを実行する手段はさらに、 前記基準信号測定値を第1のセルへ送信する手段と、 前記基準信号測定値に基づいて選択された第2のセルを特定するメッセージを受信する手段と、 前記第2のセルにアクセスする手段とを備える請求項29に記載の無線通信装置。
- 32前記第2のセルへアクセスする手段はさらに、 前記受信したメッセージから、前記第2のセルのシステム情報を取得する手段と、 前記システム情報に基づいて、前記第2のセルにアクセスする手段とを備える請求項31に記載の無線通信装置。
- 33前記アップリンク・キャリアを決定する手段はさらに、前記基準信号測定値に基づいて、ランダム・アクセスのためのアップリンク・キャリアおよびセルを選択する手段を備え、 前記ランダム・アクセスを実行する手段はさらに、前記選択されたアップリンク・キャリアによって、前記選択されたセルへのランダム・アクセスを実行する手段を備える請求項29に記載の無線通信装置。
- 34前記アップリンク・キャリアおよびセルを選択する手段はさらに、前記検出可能なセルの負荷情報にさらに基づいて、前記アップリンク・キャリアおよびセルを選択する手段を備える請求項33に記載の無線通信装置。
- 35前記ランダム・アクセスを実行する手段はさらに、近隣のセルからの干渉除去されたアップリンク・リソースで、ランダム・アクセス・プリアンブルを送信する手段を備える請求項23に記載の無線通信装置。
- 36前記ランダム・アクセスが不成功である場合、 前記複数のアップリンク・キャリアから、別のアップリンク・キャリアを選択する手段と、 前記別のアップリンク・キャリアによってランダム・アクセスを実行する手段とをさらに備える請求項23に記載の無線通信装置。
- 37前記ランダム・アクセスを実行する手段はさらに、 少なくとも1つのダウンリンク(DL)キャリアのおのおのについて、基地局が定義する物理ランダム・アクセス・チャネル(PRACH)パラメータのセットを特定する手段と、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、獲得されたダウンリンク・キャリアに対応するアップリンク・キャリアを選択する手段と、 ランダム・アクセスを実行するために、前記UEによって特定および使用されたPRACHパラメータのセットに基づいて、前記UEによって獲得されたダウンリンク・キャリアを基地局が特定できうるようにする、対応するPRACHパラメータを用いて、前記選択されたアップリンク・キャリアにおけるランダム・アクセスを実行する手段と、 前記獲得されたダウンリンク・キャリアでランダム・アクセス応答を受信する手段とを備える請求項23に記載の無線通信装置。
- 38前記ダウンリンク・キャリアはアンカ・ダウンリンク・キャリアである請求項37に記載の無線通信装置。
- 39前記PRACHパラメータのセットに基づいて、特定のラジオ・フレーム、前記ラジオ・フレーム内のサブフレーム、および周波数領域における物理リソース・ブロックのうちの少なくとも1つを特定する手段をさらに備える請求項37に記載の無線通信装置。
- 40コンピュータ読取可能媒体を備えるコンピュータ・プログラム製品であって、 前記コンピュータ読取可能媒体は、 少なくとも1つのコンピュータに対して、複数のアップリンク・キャリアから、ランダム・アクセスのためにユーザ機器(UE)によって使用されるべきアップリンク・キャリアを決定させるためのコードと、 少なくとも1つのコンピュータに対して、前記決定されたアップリンク・キャリアによってランダム・アクセスを実行させるためのコードとを備えるコンピュータ・プログラム製品
- 41無線環境におけるマルチ・キャリアのためのランダム・アクセスを実行することを容易にする無線通信の方法であって、 ユーザ機器(UE)のためのランダム・アクセスに関連するランダム・アクセス・プリアンブルを、複数のアップリンク・キャリアから決定されるアップリンク・キャリアによって受信することと、 前記決定されたアップリンク・キャリアに基づいてランダム・アクセスを実行することとを備える方法。
- 42複数のダウンリンク・キャリアからダウンリンク・キャリアを決定することと、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記ダウンリンク・キャリアに対応するアップリンク・キャリアを選択することと、 前記ランダム・アクセスを実行するアップリンク・キャリア選択について前記UEに通知することとをさらに備える請求項41に記載の方法。
- 43前記ダウンリンク・キャリアがアンカ・キャリアである請求項42に記載の方法。
- 44前記ダウンリンク・キャリアを決定することはさらに、前記基準信号測定値、チャネル品質フィードバック、および、前記検出可能なセルの負荷情報のうちの少なくとも1つに基づいて、ランダム・アクセスのためのダウンリンク・キャリアおよびセルを選択することを備える請求項42に記載の方法。
- 45前記UEの帯域幅能力に基づいて、1または複数のアップリンク・キャリアのセットを判定することと、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記1または複数のアップリンク・キャリアのセットから、アップリンク・キャリアを選択することと、 前記ランダム・アクセスを実行するアップリンク・キャリア選択について前記UEに通知することとをさらに備える請求項41に記載の方法。
- 46前記アップリンク・キャリアを選択することはさらに、前記基準信号測定値、チャネル品質フィードバック、前記検出可能なセルの負荷情報のうちの少なくとも1つに基づいて、ランダム・アクセスのためのアップリンク・キャリアおよびセルを選択することを備える請求項45に記載の方法。
- 47前記ランダム・アクセスを実行することはさらに、 基地局においてランダム・アクセス・プリアンブルを受信することと、 ランダム・アクセスのために使用される前記1または複数のダウンリンク・キャリアのセットを決定することと、 前記基地局からのアップリンク許可を備える、前記決定された1または複数のダウンリンク・キャリアのセットで、ランダム・アクセス応答を送信することと、 前記アップリンク許可に従って、前記基地局において、スケジュールされた送信を受信することとを備える請求項41に記載の方法。
- 48ランダム・アクセスを実行するために定義され前記UEによって使用されるPRACHパラメータのセットに基づいて、前記UEによって獲得されたダウンリンク・キャリアを特定することと、 前記特定されたダウンリンク・キャリアでランダム・アクセス応答を送信することとをさらに備える請求項47に記載の方法。
- 49前記ランダム・アクセスを実行することはさらに、近隣のセルからの干渉除去されたアップリンク・リソースで、ランダム・アクセス・プリアンブルを受信することを備える請求項41に記載の方法。
- 50前記ランダム・アクセスが不成功である場合、 前記複数のアップリンク・キャリアから、別のアップリンク・キャリアを選択することと、 前記ランダム・アクセスを実行するアップリンク・キャリア選択について前記UEに通知することと、 前記別のアップリンク・キャリアに基づいてランダム・アクセスを実行することとをさらに備える請求項41に記載の方法。
- 51少なくとも1つの検出可能なセルについて、干渉のあるリソースをクリアすることをさらに備え、前記リソースは、ランダム・アクセスのために必要とされる請求項41に記載の方法。
- 52無線環境におけるマルチ・キャリアのためのランダム・アクセスを実行することを容易にする無線通信の方法であって、 少なくとも1つのダウンリンク(DL)キャリアのおのおのについて、物理ランダム・アクセス・チャネル(PRACH)パラメータのセットを定義することを備える方法。
- 53前記パラメータのセットは、少なくとも、特定のラジオ・フレーム、前記ラジオ・フレーム内のサブフレーム、および周波数領域における物理リソース・ブロックを含む請求項52に記載の方法。
- 54ランダム・アクセスを実行するために定義され前記UEによって使用されるPRACHパラメータのセットに基づいて、前記UEによって獲得されたダウンリンク・キャリアを特定することと、 前記特定されたダウンリンク・キャリアでランダム・アクセス応答を送信することとをさらに備える請求項52に記載の方法。
- 55前記少なくとも1つのダウンリンク・キャリアからダウンリンク・キャリアを決定することと、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記ダウンリンク・キャリアに対応するアップリンク・キャリアを選択することと、 前記ランダム・アクセスを実行するアップリンク・キャリア選択について前記UEに通知することとをさらに備える請求項52に記載の方法。
- 56前記ダウンリンク・キャリアを決定することはさらに、前記基準信号測定値、チャネル品質フィードバック、および、前記検出可能なセルの負荷情報のうちの少なくとも1つに基づいて、ランダム・アクセスのためのダウンリンク・キャリアおよびセルを選択することを備える請求項52に記載の方法。
- 57無線通信装置であって、 ユーザ機器(UE)のためのランダム・アクセスに関連するランダム・アクセス・プリアンブルを、複数のアップリンク・キャリアから決定されたアップリンク・キャリアによって受信し、 前記決定されたアップリンク・キャリアに基づいてランダム・アクセスを実行するように構成された少なくとも1つのプロセッサと、 前記少なくとも1つのプロセッサに接続されたメモリとを備える無線通信装置。
- 58無線通信装置であって、 少なくとも1つのダウンリンク(DL)キャリアのおのおのについて、物理ランダム・アクセス・チャネル(PRACH)パラメータのセットを定義するように構成された少なくとも1つのプロセッサを備える無線通信装置。
- 59ランダム・アクセスを実行するために定義され前記UEによって使用されるPRACHパラメータのセットに基づいて、前記UEによって獲得されたダウンリンク・キャリアを特定し、 前記特定されたダウンリンク・キャリアでランダム・アクセス応答を送信するように構成された少なくとも1つのプロセッサをさらに備える請求項58に記載の無線通信装置。
- 60前記少なくとも1つのダウンリンク・キャリアからダウンリンク・キャリアを決定し、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記ダウンリンク・キャリアに対応するアップリンク・キャリアを選択し、 前記ランダム・アクセスを実行するアップリンク・キャリア選択について前記UEに通知するように構成された少なくとも1つのプロセッサをさらに備える請求項58に記載の無線通信装置。
- 61無線環境におけるマルチ・キャリアのためのランダム・アクセスを実行する無線通信装置であって、 ユーザ機器(UE)のためのランダム・アクセスに関連するランダム・アクセス・プリアンブルを、複数のアップリンク・キャリアから決定されたアップリンク・キャリアによって受信する手段と、 前記決定されたアップリンク・キャリアに基づいてランダム・アクセスを実行する手段とを備える無線通信装置。
- 62無線環境におけるマルチ・キャリアのためのランダム・アクセスを実行する無線通信装置であって、 少なくとも1つのダウンリンク(DL)キャリアのおのおのについて、物理ランダム・アクセス・チャネル(PRACH)パラメータのセットを定義する手段を備える無線通信装置。
- 63ランダム・アクセスを実行するために定義され前記UEによって使用されるPRACHパラメータのセットに基づいて、前記UEによって獲得されたダウンリンク・キャリアを特定する手段と、 前記特定されたダウンリンク・キャリアで前記ランダム・アクセス応答を送信する手段とをさらに備える請求項62に記載の無線通信装置。
- 64前記少なくとも1つのダウンリンク・キャリアからダウンリンク・キャリアを決定する手段と、 ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記ダウンリンク・キャリアに対応するアップリンク・キャリアを選択する手段と、 前記ランダム・アクセスを実行するアップリンク・キャリア選択について前記UEに通知する手段とをさらに備える請求項62に記載の無線通信装置。
- 65コンピュータ読取可能媒体を備えるコンピュータ・プログラム製品であって、 前記コンピュータ読取可能媒体は、 少なくとも1つのコンピュータに対して、ユーザ機器(UE)のためのランダム・アクセスに関連するランダム・アクセス・プリアンブルを、複数のアップリンク・キャリアから決定されたアップリンク・キャリアによって受信させるためのコードと、 少なくとも1つのコンピュータに対して、前記決定されたアップリンク・キャリアに基づいてランダム・アクセスを実行させるためのコードとを備えるコンピュータ・プログラム製品。
- 66コンピュータ読取可能媒体を備えるコンピュータ・プログラム製品であって、 前記コンピュータ読取可能媒体は、少なくとも1つのコンピュータに対して、少なくとも1つのダウンリンク(DL)キャリアのおのおのについて、物理ランダム・アクセス・チャネル(PRACH)パラメータのセットを定義させるためのコードを備えるコンピュータ・プログラム製品。
- 67少なくとも1つのコンピュータに対して、ランダム・アクセスを実行するために定義され前記UEによって使用されるPRACHパラメータのセットに基づいて、前記UEによって獲得されたダウンリンク・キャリアを特定させるためのコードと、 少なくとも1つのコンピュータに対して、前記特定されたダウンリンク・キャリアで前記ランダム・アクセス応答を送信させるためのコードとを備えるコンピュータ読取可能媒体をさらに備える請求項66に記載のコンピュータ・プログラム製品。
- 68前記コンピュータ読取可能媒体は、 少なくとも1つのコンピュータに対して、前記少なくとも1つのダウンリンク・キャリアからダウンリンク・キャリアを決定させるためのコードと、 少なくとも1つのコンピュータに対して、ランダム・アクセスのために使用されるべきアップリンク・キャリアとして、前記ダウンリンク・キャリアに対応するアップリンク・キャリアを選択させるためのコードと、 少なくとも1つのコンピュータに対して、前記ランダム・アクセスを実行するアップリンク・キャリア選択について前記UEに通知させるためのコードとをさらに備える請求項66に記載のコンピュータ・プログラム製品。
- 69ダウンリンク・キャリアを備えたオフセットを利用することを容易にする方法であって、 物理ランダム・アクセス・チャネル(PRACH)が向けられているダウンリンク・キャリアに対応する1または複数の時間オフセットを定義することと、 アップリンクによってメッセージを通信する場合、前記1または複数の時間オフセットを適用することと、 受信された時間オフセットに基づいて、前記ダウンリンク・キャリアを特定することとを備える方法。
- 70前記1または複数の時間オフセットは、同じPRACHパラメータを共有する別のダウンリンク・キャリアについて異なる請求項69に記載の方法。
- 71前記ダウンリンク・キャリアに対応する1または複数の時間オフセットをブロードキャストすることをさらに備える請求項69に記載の方法。
- 72前記1または複数の時間オフセットをメモリ内に保持することをさらに備える請求項69に記載の方法。
- 73前記1または複数の時間オフセットは、予め定義されるか、動的に決定されるか、メモリに保持されるかのうちの少なくとも1つのである請求項69に記載の方法。
Independent claims73
108 paragraphs, as filed
Cross-reference to related applications
This application is filed in US Provisional Application No. 61 / 096,602 entitled "RANDOM ACCESS IN A MULTI-CARRIER COMMUNICATION SYSTEM" filed on September 12, 2008, and "PHYSICAL RANDOM" filed on May 4, 2009. Claims the interests of US Provisional Application No. 61 / 175,398 entitled "ACCESS CHANNEL (PRACH) TRANSMISSION IN MULTICARRIER OPERATION". The entire application is incorporated herein by reference.
The following description generally relates to wireless communication, and more particularly to physical random access channel (PRACH) transmission in a multi-carrier environment.
Wireless communication systems have been widely developed to provide various types of communications, for example voice and / or data can be provided by such wireless communication systems. A typical wireless communication system or network can provide multiple users with access to one or more shared resources (eg, bandwidth, transmit power). For example, the system may use a variety of multiple access techniques such as frequency division multiplexing (FDM), time division multiplexing (TDM), code division multiplexing (CDM), and orthogonal frequency division multiplexing (OFDM). it can.
Wireless multiple access communication systems can typically support communication for multiple mobile devices at the same time. Each mobile device can communicate with one or more base stations via forward and reverse link transmissions. A forward link (ie, downlink) refers to a communication link from a base station to a mobile device, and a reverse link (ie, uplink) refers to a communication link from a mobile device to a base station.
Wireless communication systems often use one or more base stations that provide coverage. A typical base station can send multiple data streams for broadcast services, multicast services, and / or unicast services. These data streams can be streams of data consisting of independent receptions of interest to mobile devices. Mobile devices within the scope of such a base station can be used to receive one, more, or all data streams carried by a synthetic stream. Similarly, a mobile device may transmit data to a base station or another mobile device.
In a multi-carrier wireless communication environment, there are many uplink carriers and / or downlink carriers in such a heterogeneous network. The access procedure is for the user equipment (UE) to acquire C-RNTI, establish uplink (UL) synchronization, receive physical channel settings, and / or acquire information for RRC connection mode. including. In addition, the Physical Random Access Channel (PRACH) process involves the UE initiating a PRACH message to the base station using an uplink carrier. The base station responds using a downlink carrier. However, in a multi-carrier environment, multiple downlink carriers can be associated with a single uplink carrier.
The following is a simplified overview of such embodiments to give a basic understanding of one or more embodiments. This overview is not an extensive overview of all possible embodiments, but is intended to identify the key and deterministic elements of all embodiments and to delineate the scope of any or all embodiments. Not. Its sole purpose is to represent some notions of one or more embodiments in a simplified form as a prelude to the more detailed description presented below.
A related aspect is how to facilitate the selection of uplink carriers for random access. This method may include determining from multiple uplink carriers which uplink carrier should be used by the user equipment (UE) for random access. In addition, this method may include performing random access by a determined uplink carrier.
Another aspect relates to a wireless communication device. This wireless communication device determines the uplink carrier to be used by the user equipment (UE) for random access from multiple uplink carriers, and the determined uplink carrier provides random access. It may include at least one processor configured to run. Further, the wireless communication device may include memory connected to at least one processor.
Yet another aspect relates to a wireless communication device that selects an uplink carrier for random access. The wireless communication device may include means for determining from a plurality of uplink carriers which uplink carrier should be used by the UE for random access. In addition, the wireless communication device may include means for performing random access by a determined uplink carrier.
In yet another embodiment, at least one computer is allowed to determine from multiple uplink carriers which uplink carrier should be used by the UE for random access, and by the determined uplink carrier. computer program comprising a computer-readable medium having stored code for executing the random access related beam products.
Another aspect is a method that facilitates performing random access for multi-carriers in a wireless environment. This method may comprise receiving a random access preamble associated with random access for the UE by an uplink carrier. Here, the uplink carrier can be determined from a plurality of uplink carriers. In addition, this method may comprise performing random access based on a determined random carrier.
Another aspect is a method that facilitates performing random access for multi-carriers in a wireless environment. This method may comprise defining a set of physical random access channel (PRACH) parameters for each of at least one downlink (DL) carrier.
Another aspect relates to a wireless communication device. This wireless communication device receives a random access preamble related to random access for the UE by the uplink carriers determined from a plurality of uplink carriers, and is based on the determined uplink carriers. Can include at least one processor configured to perform random access. Further, the wireless communication device may include memory connected to at least one processor.
Another aspect relates to a wireless communication device. The radio communication device may include at least one processor configured to define a set of physical random access channel (PRACH) parameters for each of at least one downlink (DL) carrier. Further, the wireless communication device may include memory connected to at least one processor.
Another aspect relates to a wireless communication device that performs random access for multi-carriers in a wireless environment. The wireless communication device may include means for receiving a random access preamble associated with random access for the UE by an uplink carrier. Here, the uplink carrier is determined from a plurality of uplink carriers. Further, the wireless communication device may be provided with means for performing random access based on the determined uplink carrier.
Another aspect relates to a wireless communication device that performs random access for multiple carriers in a wireless environment. The radio communication device may provide a means of defining a set of physical random access channel (PRACH) parameters for each of at least one DL carrier.
In yet another embodiment, at least one computer is made to receive a random access preamble related to random access for the UE by an uplink carrier determined from multiple uplink carriers and determined. The present invention relates to a computer program product comprising a computer-readable medium having a stored code for performing random access by an uplink carrier.
Yet another aspect is computer readable with a stored code for at least one computer to define a set of physical random access channel (PRACH) parameters for each of at least one DL carrier. For computer program products with media.
Another aspect is a method that facilitates the identification of downlink carriers. This method may comprise defining one or more time offsets corresponding to the DL carrier to which the Physical Random Access Channel (PRACH) is directed. This method may further comprise applying one or more time offsets when communicating messages over the uplink. The method may further comprise identifying the DL carrier based on the time offset received.
In order to achieve the aforementioned and related objectives, one or more embodiments will feature features that will be fully described later and specifically noted in the claims. The following description and accompanying drawings describe in detail an exemplary embodiment with one or more embodiments. However, these embodiments show only a few of the various methods to which the principles of the various embodiments apply, and the embodiments described exhibit all such aspects and their equivalents. Is intended.
<figref num="1">FIG. 1 is an example of a wireless communication system according to various aspects described herein.</figref><figref num="2">FIG. 2 is an example of a communication device applied in a wireless communication environment.</figref><figref num="3">FIG. 3 is an example of a wireless communication system that facilitates the selection of uplink carriers for random access from multiple uplink carriers.</figref><figref num="4">FIG. 4 is an example of a random access design in a wireless communication system having a multi-carrier.</figref><figref num="5">FIG. 5 is an example of a random access design in a wireless communication system having a multi-carrier.</figref><figref num="6">FIG. 6 is an example of a random access design in a wireless communication system having a multi-carrier.</figref><figref num="7">Figure 7 is an example of random access performed in an environment with multiple carriers.</figref><figref num="8">Figure 8 is an example of resource clearing related to random access according to the claimed subject.</figref><figref num="9">Figure 9 is an example of a system that can redirect user equipment during random access based on pilot or LRP signals.</figref><figref num="10">Figure 10 is an example of how to facilitate the selection of uplink carriers for random access.</figref><figref num="11">FIG. 11 is an example of how to facilitate performing random access for multicarriers in a wireless environment.</figref><figref num="12">FIG. 12 is an example of a mobile device that facilitates the assignment of identification information (ID) for each carrier in a wireless communication system.</figref><figref num="13">FIG. 13 is an example of a system that facilitates transmission of control information for each carrier based on the identification information (ID) assigned in the wireless communication environment.</figref><figref num="14">FIG. 14 is an example of a wireless network environment that can be applied with the various systems and methods described herein.</figref><figref num="15">Figure 15 is an example of a system that makes it easy to identify the uplink carriers that should be applied for random access.</figref><figref num="16">FIG. 16 is an example of a system performing random access for multi-carriers in a wireless environment.</figref>
Various embodiments are described with reference to drawings in which the same reference number is used to indicate the same element throughout. In the following description, for purposes of illustration, a number of specific details are provided to provide a complete understanding of one or more embodiments. However, it may be clear that such an embodiment can be realized without these specific details. In other cases, well-known configurations and devices are shown in block diagram format to facilitate the description of one or more embodiments.
The terms "module," "carrier," "system," etc., as used herein, are computer-related entities that are either hardware, firmware, hardware-software combinations, software, or running software. Is intended to be referred to. For example, components can be, but are not limited to, processes, processors, objects, executables, threads of execution, programs, and / or computers running on the processor. By way of example, both an application running on a computer device and the computer device can be components. One or more components may exist within a process and / or execution thread, and the components may be localized to one computer and / or distributed across multiple computers. Moreover, these components are executable from different computer-readable media containing different data structures. These components (eg, data from one component that interacts with other components in a local or distributed system by signals, and / or networks such as the Internet with other systems. It can be communicated by local and / or remote processing according to a signal that has packets of one or more data (such as data from one component that interacts with other components via).
The techniques described herein are Code Division Multiple Access (CDMA) Systems, Time Division Multiple Access (TDMA) Systems, Frequency Division Multiple Access (FDMA) Systems, Orthogonal Frequency Division Multiple Access (OFDMA) Systems, Single Carriers. It can be used for various wireless communication systems such as frequency division multiple access (SC-FDMA) systems and other systems. The terms "system" and "network" are often used interchangeably. CDMA systems can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), CDMA2000, and the like. UTRA includes wideband CDMA (W-CDMA) and other variants of CDMA. CDMA2000 covers IS-2000, IS-95, and IS-856 standards. The TDMA system can implement wireless technologies such as the Global Mobile Communication System (GSM®). OFDMA systems include, for example, Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE. Wireless technologies such as 802.16 (WiMAX), IEEE 802.20, Flash-OFDM®, etc. can be realized. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) is the latest release of UMTS using E-UTRA, which uses OFDMA for downlink and SC-FDMA for uplink.
Single Carrier Frequency Division Multiple Access (SC-FDMA) uses single carrier modulation and frequency domain equalization. SC-FDMA has similar performance to the OFDMA system and has essentially the same overall complexity. SC-FDMA signals have a lower peak-to-average power ratio (PAPR) due to their unique single carrier structure. SC-FDMA can be used, for example, in uplink communications where lower PAPR is very useful for access terminals in terms of transmit power efficiency. Therefore, SC-FDMA can be implemented as an uplink multiple access scheme in 3GPP Long Term Evolution (LTE) or Evolved UTRA.
In addition, various embodiments are described herein in the context of mobile devices. Mobile devices are also systems, subscriber units, subscriber stations, mobile stations, mobiles, remote stations, remote terminals, access terminals, user terminals, terminals, wireless communication devices, user agents, user devices, or user devices. Can also be called (UE). Mobile devices can be cellular phones, cordless phones, session initialization protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), portable devices with wireless connectivity, computer devices, or It can be another processing device connected to a wireless modem. In addition, various embodiments are described herein in relation to the base station. Base stations can be used to communicate with mobile devices and can be referred to by access point, node B or other terminology.
In addition, the various aspects or features described herein can be realized as methods, devices, or manufactured articles using standard programming and / or engineering techniques. As used herein, the term "manufactured article" is intended to include a computer program accessible from any computer-readable device, carrier, or medium. For example, computer readable media are, but are not limited to, magnetic storage devices (eg, hard disks, floppy® disks, magnetic strips, etc.), optical disks (eg, compact discs (CDs), DVDs, etc.). Etc.), smart cards, and flash memory devices (eg EPROMs, cards, sticks, key drives, etc.). In addition, the various storage media described herein can represent one or more devices for storing information and / or other machine-readable media. The term "machine readable medium" may include, without limitation, radio channels and any other medium capable of storing, including, and / or carrying instructions and / or data.
As shown in FIG. 1, a wireless communication system 100 according to various embodiments described herein is illustrated. System 100 includes base station 102, which can include multiple antenna groups. For example, one antenna group can include antennas 104 and 106, another group can include antennas 108 and 110, and yet another group can include antennas 112 and 114. .. Only two antennas are illustrated for each antenna group, but more than two or less than two antennas may be used for each group. Base station 102 may further include a transmitter chain and a receiver chain. Each of them may include multiple components related to the transmission and reception of signals (eg, processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.), as will be appreciated by those skilled in the art.
Base station 102 may communicate with one or more mobile devices, such as mobile device 116 and mobile device 122. However, it should be understood that base station 102 can communicate with virtually any number of mobile devices similar to mobile device 116 and mobile device 122. Mobile devices 116, 122 are, for example, via cellular phones, smart phones, laptops, handheld communication devices, handheld computer devices, satellite radio, global positioning systems, PDAs, and / or wireless communication systems 100. It can be any other device suitable for communication. As shown, mobile device 116 is communicating with antenna 112 and antenna 114. Here, the antenna 112 and the antenna 114 transmit information to the access terminal 116 by the forward link 118, and receive information from the access terminal 116 by the reverse link 120. In addition, the mobile device 122 is communicating with antenna 104 and antenna 106. Here, the antenna 104 and the antenna 106 transmit information to the access terminal 122 at the forward link 124 and receive information from the access terminal 122 at the reverse link 126. In a frequency division duplex (FDD) system, for example, the forward link 118 uses a different frequency band than that used by the reverse link 120, and the forward link 124 is used by the reverse link 126. It is possible to use a frequency band different from that of. Further, in a time division duplex (TDD) system, the forward link 118 and the reverse link 120 may use a common frequency band, and the forward link 124 and the reverse link 126 may use a common frequency band. it can.
Each group of regions and / or antennas designated to communicate can be referred to as the sector of base station 102. For example, multiple antennas may be designed to communicate with access terminals within a sector of the area covered by base station 102. In communication by forward link 118 and forward link 124, the transmitting antenna of base station 102 is used to improve the signal-to-noise ratio of forward link 118 and forward link 124 for access terminal 116 and access terminal 122. Beamforming can be applied. Also, while base station 102 is using beamforming to transmit to mobile devices 116, 122 randomly scattered in the associated effective coverage, mobile devices in neighboring cells are all mobile. -It suffers less interference than a base station transmitting to a device with a single antenna.
Base station 102 (and / or each sector of base station 102) may use one or more multiple access technologies (eg, CDMA, TDMA, FDMA, OFDMA). For example, base station 102 may utilize certain techniques to communicate with mobile devices (eg, mobile devices 116, 122) in the corresponding bandwidth. In addition, if more than one technology is applied by base station 102, each technology can be associated with its respective bandwidth. The techniques described herein may include: Global System for Mobile (GSM®), General Packet Radio Service (GPRS), Enhanced Data Rate for GSM Evolution (EDGE), Universal Mobile Telecommunications System (UMTS) , Wideband Code Division Multiple Access (W-CDMA), cdmaOne (IS-95), CDMA2000, Evolution-Data Optimized (EV-DO), Ultra Mobile Broadband (UMB), Worldwide Interoperability Four Microwave Access (WiMAX), MediaFLO, Digital Multimedia Broadcasting (DMB), Digital Video Broadcasting-Handheld (DVB-H), etc. It should be recognized that the above list of technologies is given as an example and the subject matter claimed is not limited to that, and virtually any wireless communication technology is within the scope of the claims. It should be recognized that it is intended to be in.
Base station 102 may utilize the first bandwidth using the first technique. In addition, base station 102 may transmit the pilot corresponding to the first technique in the second bandwidth. By way of example, the second bandwidth can be introduced by base station 102 and / or another base station (not shown) that utilizes any second technique for communication. In addition, the pilot may indicate the existence of the first technology (eg, to a mobile device communicating by the second technology). For example, the pilot may use bits to carry information about the existence of the first technology. Further, the pilot may include information such as, for example, the sector ID of the sector utilizing the first technique, the carrier index indicating the first frequency bandwidth, and the like.
According to another example, the pilot can be a beacon (and / or a sequence of beacons). The beacon can be an OFDM symbol. Here, most of the power is transmitted by one subcarrier or a small number of subcarriers (eg, a small number of subcarriers). Thus, the beacon provides a strong peak that can be observed by mobile devices, but at the same time interferes with the data in the narrow bandwidth (eg, the rest of the bandwidth is unaffected by the beacon). According to this example, the first sector can communicate by CDMA with the first bandwidth and the second sector can communicate by OFDM with the second bandwidth. Therefore, the first sector transmits an OFDM beacon (or a sequence of OFDM beacons) in the second bandwidth (for example, to a mobile device operating with OFDM in the second bandwidth). Can indicate the availability of CDMA in the first bandwidth.
The subject system and / or method allows the UE to perform random access in wireless environments, including multi-carriers. In particular, uplink carriers may be randomly selected to perform random access to the base station. In addition, the UE may perform random access on uplink carriers that are paired with anchor carriers defined by multiple multicarriers. In addition, the subject innovation allows the UE to aggregate pilot signals (such as reference signals). Here, the base station or cell can redirect the user equipment based on such a pilot signal. In addition, a time offset may be applied to the random access preamble to identify the downlink carrier. In addition, a physical random access channel (for a particular downlink carrier, to allow the UE to determine the downlink carrier that corresponds to the uplink carrier used for random access. PRACH) A set of parameters can be defined.
Moving to FIG. 2, a communication device 200 applied in a wireless communication environment is illustrated. The communication device 200 can be a base station or part thereof, a mobile device or part thereof, or virtually any communication device that receives data transmitted in a wireless communication environment. In a communication system, the communication device 200 applies the components described below to perform random access on the uplink carriers in a multi-carrier radio environment.
The communication device 200 may include a selection module 202 that can determine the uplink carrier that performs random access. Selection module 202 may identify anchor carriers and corresponding paired uplink carriers (eg, uplink carriers associated with the identified anchor carrier). Further, the selection module 202 can select the uplink carrier from a plurality of uplink carriers in the multi-carrier wireless environment.
The communication device 200 further measures a detectable low reuse preamble (LRP) or pilot signal (eg, a reference signal) from another cell on a particular carrier (eg, such as a identified anchor carrier). Can be done. Based on such a communicated pilot signal or LRP, the communicator 200 may be redirected to a different cell.
The communication device 200 may further include a definition module 206 that can define a set of random access channel (RACH) parameters for each downlink carrier in a multi-carrier radio environment. Downlink carriers can be identified based on the defined set of RACH parameters. For example, an uplink carrier used for random access can be paired with a downlink carrier. Here, the set of RACH parameters can identify the downlink carrier.
Further, although not shown, the communication device 200 determines from a plurality of uplink carriers which uplink carrier should be used by the UE for random access and the determined uplink carrier. It should be recognized that it may contain a memory that holds a set of instructions related to performing random access etc. Further, the communication device 200 may include a processor utilized in connection with executing a set of instructions (for example, a set of instructions held in memory, a set of instructions obtained from another source).
Further, although not shown, the communication device 200 receives a random access preamble associated with random access for the UE by an uplink carrier that can be determined from multiple uplink carriers. It may include a memory that holds a set of instructions related to performing random access by a determined random carrier and the like. Further, the communication device 200 may include a processor utilized in connection with executing a set of instructions (for example, a set of instructions held in memory, a set of instructions obtained from another source).
With reference to FIG. 3, a wireless communication device 300 capable of providing identification information of control information related to a plurality of carriers is exemplified for a user device. The system 300 includes base station 302 communicating with user equipment 304 (and / or any number of other user equipment (not shown)). Further, the system 300 can be a MIMO system. In addition, System 300 is an OFDMA wireless network, 3GPP. It can operate in LTE wireless networks and the like. Further, the components and functions illustrated and described below within the base station 302 can, in one example, conversely also exist within the user equipment 304, and the configurations illustrated are brief description. In order to do so, these components are excluded. Base station 302 (eg, advanced node B, e-node B, eNB) can transmit and / or receive information, signals, data, instructions, commands, bits, symbols, and the like. It should be recognized that the term eNB can also be referred to by base station, access point, node B, or some other terminology. Base station 302 can communicate with UE 304 via forward links (downlinks) and / or reverse links (uplinks). UE304 may transmit and / or receive information, signals, data, instructions, commands, bits, symbols, etc. Further, although not shown, the system 300 has any number of different base stations (s) similar to base station 302 and / or any number of UEs (s) similar to UE 304. Can include. By way of example, the system 300 can be a long term evolution advanced (LTE-A) based system. However, the subject matter claimed is not limited to that.
Base station 302 is a downlink identification module capable of evaluating the downlink carrier associated with the uplink carrier to identify the downlink carrier paired with the uplink carrier used for random access. Includes 306. In particular, the downlink identification module 306 can evaluate a set of RACH parameters that can be defined in relation to a particular downlink carrier. Thus, user equipment 304 may perform random access on the selected uplink carrier and base station 302 may determine the corresponding downlink carrier based on the defined RACH parameters. It should be recognized that time offsets can be used to identify downlink carriers. Base station 302 may further include an interference clear module 308 that can eliminate interference. In other words, the interference clear module 308 can ensure that the resources used for access are deinterfered.
User equipment 304 may include a selection module 310 that can select an uplink carrier to perform random access to base station 302. Selection module 310 may identify anchor carriers and corresponding uplink carriers to perform random access. In other cases, the selection module 310 may randomly select an uplink carrier from a multi-carrier group that supports PRACH.
User equipment 304 may further include a random access (RA) module 312 capable of performing random access. For example, in the random access module 312, the user equipment 304 communicates a random access preamble, receives a random access response from base station 302, communicates scheduled transmissions with base station 302, and base station. Allows you to receive conflict resolutions from 302.
User equipment 304 may further include pilot module 314 capable of aggregating and / or collecting pilot signals (eg, reference signals) and / or low reuse preambles (LRPs) from detectable cells. Pilot module 314 can communicate these measurements to base station 302. Here, the base station can determine whether the user device 304 should be redirected to another cell.
The user equipment 304 may also include a definition module 316 that ensures that each downlink carrier in the multi-carrier system corresponds to a particular set of RACH parameters. Therefore, the set of detected RACH parameters is detected and the downlink carrier is identified at base station 302.
System 300 may support multi-carrier operation for random access associated with LTE-A. For example, in system 300, multiple DL carriers can be associated with one uplink (UL) carrier. In contrast, with the traditional approach associated with LTE Release 8, each PRACH (eg, each UL carrier) can be associated with one DL carrier.
For example, in the case of competition-based PRACH, the UE304 has a random access signal (eg, message 1, random access preamble, random access probe, random access) on the uplink utilizing a particular UL carrier. -PRACH can be started by sending a sequence). Base station 302 may respond to the reception of message 1 with a random access response (eg, message 2) transmitted on the downlink. However, the traditional approach is associated with one UL carrier utilized for Message 1, as multiple DL carriers can be associated with one UL carrier associated with LTE-A multi-carrier operation. It may include sending message 2 from base station 302 using all DL carriers. This is because base station 302 does not know the UE directed for message 2. As a result, downlink resources can be used inefficiently according to the previous example.
In contrast, System 300 enhances the efficiency associated with LTE-A multi-carrier operation. UE304 may identify a particular time offset from the set of possible time offsets that should be utilized when sending message 1 over the uplink. In addition, the UE 304 may use this selected specific time offset to send a random access message (eg, message 1) over the uplink.
Base station 302 may recognize a particular time offset associated with message 1 received from UE 304. In addition, base station 302 may identify a DL carrier (eg, DL carrier 1) from a set of possible DL carriers that correspond to a particular time offset in message 1. The base station 302 can then utilize the DL carrier (eg, DL carrier 1) from the identified possible set of DL carriers to transmit message 2 over the downlink. According to another example, a subset of possible DL carriers can correspond to the offset recognized by base station 302. In addition, base station 302 may use such a subset of DL carriers to send message 2.
Each DL carrier utilized in System 300 can be associated with a particular time offset. In general, PRACH can be set by higher order layers with periodicity and offset for transmission opportunities. In LTE Release 8, PRACH can be configured to transmit in any subframe of radio frames (eg, period = 1 ms). According to another example, PRACH can be set with a period of 2 milliseconds. Therefore, PRACH transmissions can occur at subframes 0, 2, 4, 6, and 8 (for example, assuming a radio frame with a period of 10 milliseconds).
System 300 may apply a DL carrier-specific offset known by both base stations 302 and UE 304 before making random access. For example, each DL carrier-specific offset can correspond to a given DL carrier. However, it should be recognized that the subject matter claimed is not limited to it. For example, DL carrier-specific offsets can be broadcast (eg, by base station 302, along with system information). According to another example, the DL carrier-specific offset can be predefined, dynamically determined, and so on. According to a further example, DL carrier-specific offsets can be retained in memory (eg, for base stations 302 and / or UE 304).
To distinguish between different DL carriers to which the PRACH is directed, the UE 304 may select a DL carrier-specific offset that should be utilized when sending message 1 over the uplink. For example, PRACH can be set with a period of 1 millisecond. According to this example, if there are two possible DL carriers, one of the possible DL carriers (eg DL carrier 1) is defined to correspond to an even number of subframes and the possible DLs. Others of the carriers (eg, DL carrier 2) can be defined to correspond to odd subframes. However, it should be recognized that the claimed subject matter is not limited to the prior relationship between DL carriers and offsets. For example, it is considered that the divisions do not have to be orthogonal.
Therefore, consider that there are five DL carriers. Rather than having each of the 5 DL carriers associated with the 1 / 5th of the PRACH opportunities, the 2 / 5th of the PRACH opportunities may be applied for each DL carrier (eg, offset). , Can support multiple DL carriers). Therefore, each DL carrier with a 1 ms cycle can be associated with 4 offsets with a 10 ms cycle. This can achieve a trade-off between DL overhead and PRACH delay.
In addition, although not shown, from multiple uplink carriers, determine which uplink carrier should be used by the UE for random access, and random access by the determined uplink carrier. It should be recognized that it may contain a memory that holds a set of instructions related to execution, etc. Further, the communication device 200 may include a processor utilized in connection with executing a set of instructions (for example, a set of instructions held in memory, a set of instructions obtained from another source).
In addition, it has been determined that, although not shown, the random access preamble associated with random access for the UE will be received by the uplink carriers determined from multiple uplink carriers. It should be recognized that it may contain a memory that holds a set of instructions related to performing random access by a random carrier, etc. Further, the communication device 200 may include a processor utilized in connection with executing a set of instructions (for example, a set of instructions held in memory, a set of instructions obtained from another source).
As shown in FIG. 4, the example of wireless communication system 400 provides to assign identification information (ID) for each carrier. FIG. 4 illustrates a random access 400 design applicable for multi-carrier operation. In this design, each downlink carrier is paired with the corresponding uplink carrier. The cell selected by the UE for random access has an uplink anchor carrier paired with a downlink anchor carrier for the cell. Uplink anchor carriers can support multiple physical random access channels (PRACH) to accommodate the vast number of UEs that can access the system. This is especially important in multi-segment operation. The UE performs random access on one of the PRACHs supported by the uplink anchor carrier. If the UE is camping on a particular downlink carrier, the UE will perform random access on the paired uplink carriers. It should be recognized that the UE camps on a downlink carrier where the UE is synchronized and the UE receives some of the system information.
FIG. 5 illustrates another design 500 of random access applicable to multi-carrier operation. This design allows the UE to randomly select an uplink carrier from a group of uplink carriers that support PRACH. If the UE is camping on a particular downlink carrier on the cell, the UE may still perform random access on any uplink carrier in this cell. It should be recognized that the UE camps on a downlink carrier where the UE is synchronized and the UE receives some of the system information. The UE can perform random access on the PRACH supported by the selected uplink carrier. The UE expects a random access response on the downlink carrier paired with the uplink carrier used for random access.
Figure 6 shows a random access design 600 applicable to multi-segment operation. In this example, the cell is assigned downlink carrier 1 and uplink carrier 1. This cell supports three PRACHs 1, 2 and 3 in another part of the uplink carrier. UE1 can "see" only part of the total bandwidth and can perform random access with PRACH2 only. UE2 and UE3 have greater bandwidth capacity and can perform random access on any of the three PRACHs.
If multiple access schemes (eg, the schemes shown in Figures 4 and 5) are supported, the system information will include a flag indicating which scheme will be used for random access. If multiple uplink carriers are available for the selected cell, the UE will first try random access on one uplink carrier, and if the first attempt is unsuccessful, then the same. Try random access on another uplink carrier for the cell.
Figure 7 shows the design 700 of a random access procedure that is backward compatible with 3GPP Release 8. On PRACH, the UE sends a random access preamble with a signature sequence (step 1). The UE receives a random access response on the downlink shared channel (DL-SCH) (step 2). Random access responses may include timing alignment information, initial uplink permissions, temporary C-RNTI allocation, and the like. The UE sends the first scheduled uplink transmission on the uplink shared channel (UL-SCH) (step 3). When the UE makes the first access, the first uplink transmission can include an RRC connection request with an established purpose, a SAE temporary mobile station identifier (S-TMSI), a random ID, and so on. If multiple UEs send the same random access preamble to the cell at the same time with the same PRACH, conflict resolution information can be sent via DL-SCH (step 4). RRC connection setup and physical layer (PHY) channel configuration are also performed. The messages sent in steps 1 to 4 are also referred to as messages 1 to 4, respectively.
If the UE is synchronized to the selected cell, which is the best cell in the downlink, then this cell is the carrier resource from which interference from neighboring cells has been removed. Alternatively, send message 2 and message 4 with a carrier resource that has not been removed. However, the best downlink cells may not have the best uplink for the UE due to possible inconsistencies in the transmit power levels of different types of cells (eg macro cells and pico cells). .. Therefore, interference can be statically eliminated in the uplink resources of the selected cell to ensure reliable transmission of message 3 to this cell.
The UE may perform random access to a selected cell that does not have the best path loss (PL), resulting in significant interference with other cells accessing / transmitting this cell. Therefore, it can be beneficial for cells that will experience significant interference because they clear the resources and do not use them.
The UE may send message 3 (the first scheduled uplink send) on the resource from which the interference has been removed. This message interferes with the uplink data in other cells (eg, the cell where the UE has the best path loss). However, if the cells have the same PRACH settings, the UE can send message 1 (random access preamble) on the PRACH without decoupling. The PRACH setting can be associated with a specific resource, called an access resource, used to send message 1. Interference elimination is not required for message 1 due to the large processing gain for PRACH and the low likelihood of PRACH being used if the same PRACH settings are used for neighboring cells. It is beneficial for pico cells within the effective communication range of the macro cell to have the same PRACH setting (for example, if the PRACH is set and triggered by the MAC layer, the random access preamble transmission will Limited to time and frequency resources).
It is desirable to clear the access resources for PRACH. Cleared access resources are rare and less periodic than regularly configured access resources. Different time offsets and / or different non-overlapping PRACH settings in different cells avoid access resource conflicts and allow clearing.
Figure 8 shows a resource clear design 800 for random access. In the example shown in FIG. 8, PRACH setting A includes access resources in subframes 4, 7, etc. that have not been stripped of interference from neighboring cells. PRACH setting B includes access resources in subframes 5, 8 and so on that have not been stripped of interference from neighboring cells. Subframes 1 and 2 may contain cleared access resources with interference from neighboring cells removed. Cleared and / or uncleared access resources may be transmitted to the UE by system information or provided by another method.
From a UE perspective, the procedure for accessing a cell that is a non-best downlink cell can be the same as the procedure for accessing a cell that is the best downlink cell. The system ensures that the resources used for access are deinterfered. If the selected cell is the cell with the best route loss, message 2 and message 4 can be sent with the deinterfered resource. In addition, if cells with CSG also use the same uplink carrier, the access resources for message 1 and message 3 can be sent with the cleared access resources.
To allow dynamic clearing of access resources, to clear access resources, the UE can communicate with CSG cells that the UE cannot access. The UE is within the valid range of the CSG cell and may be the dominant interferer to this cell, but the CSG may not be able to access the cell. However, the UE can communicate with the CSG cell in order to clear the resource and allow the UE to access another cell.
It is desirable to use a random access procedure that is backward compatible with 3GPP Release 8 as shown in Figure 7 for several reasons. First, there is no need to change the random access procedure. Second, statically cleared access resources are small. For multi-carrier configurations, at least one carrier is compatible with Release 8 and random access procedures are easily supported.
Figure 9 illustrates the design of a random access procedure that supports redirection for backward compatibility and load leveling / range expansion. The UE wants to perform initial access to the camp cell at power up or in RRC idle mode. The UE is syncing to the best downlink cell and selecting this best downlink cell (or camping in the best downlink cell). It should be recognized that a UE camp is associated with a UE that camps on a downlink carrier where the UE is synchronized and the UE receives some of the system information. When the UE is ready to perform random access, it measures the low reuse preamble (LRP) that can be detected from different cells in one carrier, for example the anchor carrier for each cell. An LRP is a reference signal or pilot transmitted on an deinterfered resource and is used by the UE to estimate downlink channels and route loss.
The UE sends a random access preamble to the selected cell (step 1) and receives a random access response (step 2). The UE reports the LRP reading of the discoverable cell in message 3 (step 3).
Based on the load of cell and LRP measurements, the UE can be redirected to a new cell. The selected cell then sends a redirection message to the UE (step 4). This redirection message identifies a new cell and also contains system information for this cell. This avoids the need to statically clear interference in the downlink resources used to send system information from the new cell. The contents of messages 3 and 4 can be modified to support redirection for load leveling / range expansion.
In RRC connection mode, the UE can communicate with the service provider cell and be redirected to access a new cell for load leveling / range expansion. The service-providing cell may send a reconfiguration message to instruct the UE to access a new cell on a particular carrier. Redirection decisions and / or specific carriers can be based on cell load and LRP measurements reported by the UE. The reset message may contain system information used to access new cells. This allows the UE to skip reading system information from the new cell. The new cell will not need to provide deinterfered resources to send system information to the UE.
In another aspect, the random access procedure can be defined as incompatible with 3GPP Release 8. The UE can operate in RRC idle mode or RRC connection mode. The UE can perform random access in different ways, depending on the mode of operation.
In RRC idle mode, the UE has the freedom to access cells according to the decisions made by the UE (eg, UE-based movement). If the UE is ready to access the cell (eg, if the UE has data to send), the UE can select cells and carriers based on LRP measurements and cell load. The UE can synchronize with the candidate cell and acquire system information from the candidate cell. For range expansion cells, the resources used for synchronization and system information can be deinterfered, for example, using static resource clearing. The UE can monitor the LRP of other cells. The UE can monitor the LRP with one carrier per cell (eg, anchor carrier), assuming the carriers are fairly close in the spectrum. Each cell can inform a load such as the number of UEs and resource allocation, for example. This load information is provided for each carrier and can be broadcast on deinterfered resources. This load information can be transmitted by the anchor carrier of the cell or can be transmitted independently by each carrier. The UE monitors the load information only on the anchor carrier or on each carrier, depending on how the load information is transmitted.
The UE may select carriers and cells for access based on the specified algorithm. In one design, the UE can make decisions based on an algorithm in which each cell and each carrier is treated independently. In another design, all carriers in each cell are treated together to obtain a metric for the cell. The UE compares different candidate cells based on these metrics and selects cells and carriers. For both designs, the UE performs random access to selected cells and carriers.
In RRC connection mode, the decision to perform random access to another cell on a particular carrier can be made by the network (in the case of a network-based move) or by the UE (in the case of a UE-based move). .. Random access procedures for UE-based roaming can be as follows: The UE synchronizes with the candidate cell and gets the system information from the candidate cell. For range expansion cells, the resources used for synchronization and system information can be deinterfered, for example, using static resource clearing. The UE monitors and reports LRP measurements for all cells above a certain threshold. The UE can monitor the LRP with one carrier per cell (eg, anchor carrier), assuming the carriers are fairly close in the spectrum. The UE sends the report only to the current service offering cell. The service providing cell shares these reports with other cells via the backhaul. Distribution of resources between cells and carriers can be performed based on LRP from this UE as well as other UEs. This resource allocation is performed between a backhaul-tuned set of cells based on the specified algorithm.
Each cell can transmit load information for transmitting resource allocation, the number of UEs, and the like. This load information is provided for each carrier and is a deinterfered resource that can be sent by broadcast or unicast message. This load information can be transmitted by the anchor carrier of the cell or can be transmitted independently by each carrier. The UE monitors the load information only on the anchor carrier or on each carrier, depending on how the load information is transmitted. The UE may select carriers and cells for access based on the specified algorithm. The UE can then perform random access to the selected cells and carriers.
The random access procedure for network-based movement is as follows. The UE periodically monitors and reports on LRP readings in another cell. The UE can report LRP measurements for one carrier per cell (eg, anchor carrier), assuming the carriers are fairly close in the spectrum. The UE sends the report only to the service offering cell. The service providing cell shares these reports with other cells via the backhaul. Resource allocation between cells and carriers can be performed based on LRP reports from other UEs as well as LPR reports from UEs. Cells and carriers can be selected for the UE based on a specified algorithm and by coordination between sets of cells via backhaul. The service providing cell sends a reconfiguration message to the UE containing the selected cell and carrier. The UE can then perform random access to the selected cells and carriers.
With reference to FIGS. 10 and 11, the methods associated with applying random access within a multi-carrier environment are illustrated. For the purposes of simplicity, these methods are shown and described as a series of actions, but these methods are shown and described herein in accordance with one or more embodiments. It should be understood and recognized that it is not limited by the order of actions, as it can occur in a different order or at the same time as other actions. For example, one of ordinary skill in the art will understand and recognize that these methods can instead be represented as a series of interrelated states or events, such as in a phase diagram. Moreover, not all of the illustrated actions are required to implement the method according to one or more embodiments.
Moving to FIG. 10, a method 1000 is illustrated that facilitates identification of control information associated with cross-carrier operation. Reference number 1002 may determine which uplink carrier should be used by the UE for random access from multiple uplink carriers. At reference number 1004, random access can be performed by the determined uplink carrier.
See Figure 11 for a method 1100 that facilitates communication of control information from multiple carriers to the UE for cross-carrier operation. At reference number 1102, the random access preamble associated with random access for the UE is received by the uplink carrier. Here, the uplink carrier is determined from a plurality of uplink carriers. At reference number 1104, random access can be performed by the determined uplink carrier.
FIG. 12 is an example of a mobile device 1200 that facilitates the assignment of identification information (ID) for each carrier in a wireless communication system. The mobile device 1200 receives a signal from, for example, a receiving antenna (not shown), performs common operations on the received signal (eg, filtering, amplifying, downconverting, etc.) and digitizes these tuned signals. Can be equipped with a receiver 1202 to obtain a sample. The receiver 1202 may include a demodulator 1204 that demodulates the received symbols and provides them to processor 1206 for channel estimation. Processor 1206 is one or more processors, mobile device 1200, specialized in analyzing information received by receiver 1202 and / or generating information for transmission by transmitter 1216. The processor that controls the components and / or the analysis of the information received by the receiver 1202, the generation of information for transmission by the transmitter 1216, and one or more of the mobile device 1200. It can be a processor that controls all the components of.
The mobile device 1200 further comprises memory 1208 operably connected to processor 1206. This memory relates to data to be transmitted, data received, information related to available channels, data associated with analyzed signals and / or interference strength, assigned channels, power, rates, etc. It may store information and any other information appropriate for channel estimation and communication over the channel. Memory 1208 may also store algorithms and / or protocols associated with channel estimation and / or utilization (eg, performance-based, capacity-based, etc.).
The data store described herein (eg, memory 1208) is either a volatile memory or a non-volatile memory. Alternatively, it will be recognized that it can include both volatile and non-volatile memory. By illustration, but not limited to, non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electronic programmable ROM (EPROM), electronically erasable PROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) that acts as external cache memory. By example, but not by limitation, RAM includes, for example, Synchronous RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR). It is available in many forms such as SDRAM), enhanced SDRAM (ESDRAM), synclink DRAM (SLDRAM), and direct rambus RAM (DRRAM). The subject system and method of memory 1208 is intended to include, but is not limited to, these and any other suitable type of memory.
Processor 1206 may also be operably connected to selection module 1210 and / or pilot module 1212. The selection module 1210 can determine the uplink carrier on which the mobile device 1200 performs random access. The selection module 1210 may randomly select uplink carriers and / or identify anchor carriers and corresponding (eg, paired) uplink carriers. Pilot module 1212 may collect pilot signals and / or LRP from detectable cells to enhance redirection from the base station. In addition, although not shown, the mobile device 1200 provides each downlink carrier to allow the base station to identify the downlink carrier associated with the uplink carrier used for random access. A set of carrier RACH parameters can be defined.
The mobile device 1200 further comprises a modulator 1214 that modulates the signal and a transmitter 1216 that transmits the signal to, for example, a base station, another mobile device, and the like. Although shown separately from processor 606, the selection module 1210, pilot module 1212, demodulator 1204, and / or modulator 1214 can be part of processor 1206 or multiple processors (not shown). Should be recognized.
As described above, FIG. 13 is an example of a system 1300 that facilitates transmission of control information for each carrier based on the assigned identification information (ID) in a wireless communication environment. The system 1300 is a base having a receiver 1310 that receives signals from one or more mobile devices 1304 by multiple receiving antennas 1306 and a transmitter 1324 that transmits signals from one or more mobile devices 1304 by transmitting antenna 1308. It has a station 1302 (eg, an access point). The receiver 1310 receives information from the receiving antenna 1306. In addition, it is operably associated with a demodulator 1312 that demodulates received information. The demodulated symbol is Signal (eg, pilot) strength and / or interference strength, data that can be sent to and received from mobile device 1304 (or another base station (not shown)), and / or the various described herein. Connected to memory 1316, which stores information related to estimating any other information related to performing various operations and functions, analyzed by processor 1314, which may resemble the processor described above in connection with FIG. Can be done.
Processor 1314 is further connected to DL Specific Module 1318 and / or Interference Module 1320. DL-specific module 1318 can evaluate a set of time offset and / or RACH parameters to determine the downlink carrier that corresponds to the uplink carrier used for random access. Interference module 1320 can eliminate interference in the resources used for access. In addition, the interference module 1320 can evaluate the pilot signal and / or LRP received from the detected cell to determine if the UE should be redirected to another cell. Further, although shown separately from processor 1314, DL specific module 1318, interference module 1320, demodulator 1312, and / or modulator 1322 are part of processor 1314 or multiple processors (not shown). It should be recognized that it can be.
FIG. 14 shows an example of the wireless communication system 1400. The wireless communication system 1400 shows only one base station 1410 and one mobile device 1450 for the sake of brevity. However, system 1400 can include more than one base station and / or more than one mobile device, and these additional base stations and / or mobile devices are the base station 1410 and mobile described below. It should be recognized that it can be substantially the same as or different from the example of device 1450. In addition, base station 1410 and / or mobile device 1450 are the systems described herein (FIGS. 1-9, 12-13) to facilitate wireless communication between them, and It should be recognized that / or the method (FIGS. 10-11) can be applied.
At base station 1410, traffic data for many data streams is provided from the data source 1412 to the transmit (TX) data processor 1414. As an example, each data stream is transmitted through its respective antenna. The TX data processor 1414 formats the traffic data stream, encodes it based on the particular encoding scheme selected for this data stream, interleaves it, and provides the encoded data.
The encoded data in each data stream can be multiplexed with pilot data using Orthogonal Frequency Division Multiplexing (OFDM) technology. Further, or instead, the pilot symbol can be frequency division multiplexing (FDM), time division multiplexing (TDM), or code division multiplexing (CDM). Pilot data is generally a known data pattern that is processed in a known way and can be used in mobile device 1450s to estimate channel response. The multiplexed pilot and encoded data for each data stream is the specific modulation scheme selected for the data stream (eg, binary phase shift keying (BPSK), quadrature phase shift). Modulated (eg, symbol-mapped) based on keying (QPSK), M phase shift keying (M-PSK), M quadrature keying (M-QAM), etc.) to provide modulated symbols. The data rate, coding, and modulation of each data stream can be determined by the instructions performed or provided by processor 1430.
Modulation symbols for the data stream are provided to the TX MIMO processor 1420, which processes the modulation symbols (for example, for OFDM). The TX MIMO processor 1420 was then N<sub>T</sub>N modulation symbol streams<sub>T</sub>Provided to multiple transmitters (TMTR) 1422a to 1422t. In various embodiments, the TX MIMO processor 1420 applies beamforming weights to the symbols of the data stream and to the antenna on which the symbols are transmitted.
Each transmitter 1422 receives and processes each symbol stream to provide one or more analog signals, and also to provide a suitable modulated signal for transmission over MIMO channels. , Adjust this analog signal (eg, amplify, filter, and upconvert). In addition, N from transmitters 1422a to 1422t<sub>T</sub>The number of modulated signals is N<sub>T</sub>It is transmitted from each of the antennas 1424a to 1424t.
On mobile device 1450, the transmitted modulated signal is N<sub>R</sub>The signal received by the antennas 1452a to 1452r and received from each antenna 1452 is provided to each of the receivers (RCVR) 1454a to 1454r. Each receiver 1454 tunes (eg, filters, amplifies, and downconverts) each signal, digitizes the tuned signal to provide a sample, and further processes this sample to provide a corresponding " Provides a "received" symbol stream.
RX data processor 1460 is N<sub>R</sub>Receivers 1454 to N<sub>R</sub>Receive N symbol streams and process these received symbol streams based on specific receiver processing techniques.<sub>T</sub>Provides a stream of "detected" symbols. The RX data processor 1460 demodulates, deinterleaves, and decodes each detected symbol stream to restore the traffic data for that data stream. The processing by the RX data processor 1460 is complementary to that performed by the TX MIMO processor 1420 and TX data processor 1414 at base station 1410.
Processor 1470 periodically determines which precoded matrix to use, as described above. In addition, processor 1470 can specify a reverse link message with a matrix index section and a rank value section.
Reverse link messages can contain different types of information about communication links and / or received data streams. Reverse link messages are processed by TX data processor 1438, which also receives traffic data for many data streams from data source 1436, modulated by modulator 1480, and tuned by transmitters 1454a to 1454r. , Sent back to base station 1410.
At base station 1410, the modulated signal from mobile device 1450 is received by antenna 1424, tuned by receiver 1422, demodulated by demodulator 1440, processed by RX data processor 1442, and processed by mobile device 1450. The transmitted reverse link message is extracted. In addition, processor 1430 processes this extracted message to determine which pre-coded matrix to use to determine the beamforming weights.
Processors 1430 and 1470 direct operations (eg, control, coordination, management, etc.) on base station 1410 and mobile device 1450, respectively. Processor 1430 and processor 1470 can be associated with memory 1432 and memory 1472, which store program code and data, respectively. Processor 1430 and Processor 1470 also perform calculations to derive frequency and impulse response estimates for uplink and downlink, respectively.
It should be understood that the embodiments described herein can be implemented with hardware, software, firmware, middleware, microcode, or any combination thereof. When implemented in hardware, the processing unit is one or more application-specific ICs (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic circuits (PLDs), field programmable gates. It can be implemented within an array (FPGA), processor, controller, microcontroller, microprocessor, other electronic unit designed to perform the functions described herein, or a combination thereof.
When these embodiments are realized in software, firmware, middleware or microcode, program code or code segments, they can be stored in machine readable media such as storage elements. A code segment can represent a procedure, function, subprogram, program, routine, subroutine, module, software package, class, or any combination of instructions, data structures, or program statements. A code segment can be connected to another code segment or hardware circuit by passing and / or receiving information, data, arguments, parameters, or stored contents. Information, arguments, parameters, data, etc. may be delivered, transferred, or transmitted using any suitable means, including memory sharing, message delivery, token delivery, network transmission, and the like.
When implemented in software, these techniques described herein can be implemented using modules (eg, procedures, functions, etc.) that perform the functions described herein. Software code is stored in a memory unit and can be executed by a processor. Memory units can be implemented inside or outside the processor. When implemented outside the processor, the memory unit may be communicatively connected to the processor by a variety of means well known in the art.
With reference to FIG. 15, a system 1500 that identifies uplink carriers to perform random access is illustrated. For example, system 1000 can be present at least partially in a base station, mobile device, and so on. It should be recognized that the system 1500 is shown as including functional blocks that may be functional blocks that represent the functionality provided by the processor, software, or a combination thereof (eg, firmware). System 1500 includes logical group 1502 of electronic components that can work together. Logical group 1502 may include electronic components 1504 from multiple uplink carriers to determine which uplink carrier should be used by the UE for random access. In addition, the logical group 1502 may include an electronic component 1506 for performing random access by the determined uplink carrier. In addition, system 1500 may include memory 1508 that holds instructions for performing functions associated with electronic components 1504, 1506. Although shown as being outside memory 1508, it should be understood that one or more of the electronic components 1504, 1506 can reside within memory 1508.
Moving to FIG. 16, a system 1600 that performs random access in a multi-carrier wireless environment is illustrated. System 1600 can be present in, for example, base stations, mobile devices, and the like. As shown, the system 1600 may represent the functionality provided by the processor, software, or a combination of these (eg, firmware). System 1600 includes a logical group 1602 consisting of electronic components that facilitates random access to user equipment in a multi-carrier wireless environment. The logical group 1602 may include an electronic component 1604 for receiving a random access preamble associated with random access for the UE by the uplink carrier. Here, the uplink carrier is determined from a plurality of uplink carriers. In addition, the logical group 1602 may include an electronic component 1606 for performing random access by the determined uplink carrier. In addition, system 1600 may include memory 1608 that holds instructions for performing functions associated with electronic components 1604, 1606. Although shown to be outside memory 1608, it should be understood that one or more of the electronic components 1604, 1606 can reside within memory 1608.
The above includes an example of one or more embodiments. Of course, it is not possible to describe all possible combinations of components or methods for the purposes of describing the embodiments described above, but one of ordinary skill in the art will have more combinations and replacements of the various embodiments. You can recognize that it is possible. Accordingly, the described embodiments are intended to include all such changes, changes, and modifications within the spirit and scope of the claims. Furthermore, as long as the term "contains" is used in either the detailed description or the claims, the term is interpreted when the term "provides" is applied as a transition term in the claims. It is intended to be inclusive, as is the term "prepared".
17 sheets
Sheet 1 Sheet 2 Sheet 3 Sheet 4 Sheet 5 Sheet 6 Sheet 7 Sheet 8 Sheet 9 Sheet 10 Sheet 11 Sheet 12 Sheet 13 Sheet 14 Sheet 15 Sheet 16 Sheet 17
Every citation, both ways
| Document | Relation | Office | Cited during |
|---|---|---|---|
| JP2014033477A | Cited by | Japan | Search report |
| WO2006116102A2 | Cites | World Intellectual Property Organization (WIPO) | Examiner |
| WO2007052971A1 | Cites | World Intellectual Property Organization (WIPO) | Examiner |
| JP2008017195A | Cites | Japan | Examiner |
| WO2008054114A2 | Cites | World Intellectual Property Organization (WIPO) | Examiner |
| WO2008055235A2 | Cites | World Intellectual Property Organization (WIPO) | Examiner |
18 members in 7 offices
Priority claims19
| Document | Office | Kind | Date |
|---|---|---|---|
| 61096602 | United States of America | – | |
| 9660208 | United States of America | P | |
| 9660208 | United States of America | P | |
| 17539809 | United States of America | P | |
| 17539809 | United States of America | P | |
| 61175398 | United States of America | – | |
| 12557485 | United States of America | – | |
| 55748509 | United States of America | A | |
| 55748509 | United States of America | A | |
| 2009056726 | United States of America | W | |
| 2009056726 | United States of America | W | |
| 2008096602 | – | – | – |
| 2009175398 | – | – | – |
| 2009557485 | – | – | – |
| 2009056726 | – | – | – |
| US20080096602P | – | – | – |
| US20090175398P | – | – | – |
| US20090557485 | – | – | – |
| WO2009US56726 | – | – | – |
Members18
| Document | Office | Kind | |
|---|---|---|---|
| US2010067470A1 | United States of America | A1 | |
| WO2010030935A2 | World Intellectual Property Organization (WIPO) | A2 | |
| WO2010030935A3 | World Intellectual Property Organization (WIPO) | A3 | |
| WO2010030935A3 | World Intellectual Property Organization (WIPO) | A3 | |
| TW201106743A | Taiwan Province of China | A | |
| KR20110053386A | Republic of Korea | A | |
| EP2351444A2 | European Patent Office (EPO) | A2 | |
| CN102150466A | China | A | |
| JP2012502598AThis record | Japan | A | |
| KR20130036362A | Republic of Korea | A | |
| KR101287491B1 | Republic of Korea | B1 | |
| KR101298149B1 | Republic of Korea | B1 | |
| US8526374B2 | United States of America | B2 | |
| JP5373086B2 | Japan | B2 | |
| US2013336260A1 | United States of America | A1 | |
| CN102150466B | China | B | |
| US9370003B2 | United States of America | B2 | |
| EP2351444B1 | European Patent Office (EPO) | B1 |
12 legal events, as the office reported them to INPADOC
Over the term
Point at a mark for the eventEvents
| Event | Code | |
|---|---|---|
| Cancellation because of no payment of annual feesLAPS | LAPS | |
| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
| Receipt of annual feesJAPANESE INTERMEDIATE CODE: R250R250 | R250 | |
| Certificate of patent or registration of utility modelJAPANESE INTERMEDIATE CODE: R150R150 | R150 | |
| Certificate of patent or registration of utility modelJAPANESE INTERMEDIATE CODE: R150R150 | R150 | |
| First payment of annual fees (during grant procedure)JAPANESE INTERMEDIATE CODE: A61A61 | A61 | |
| Written decision to grant a patent or to grant a registration (utility model)JAPANESE INTERMEDIATE CODE: A01A01 | A01 | |
| Decision of grant or rejection writtenTRDD | TRDD | |
| Written amendmentJAPANESE INTERMEDIATE CODE: A523A521 | A521 | |
| Notification of reasons for refusalJAPANESE INTERMEDIATE CODE: A131A131 | A131 | |
| Report on retrievalJAPANESE INTERMEDIATE CODE: A971007A977 | A977 |
Numbers
- Publication
- 2012502598
- Publication, DOCDB
- 2012502598
- Publication, EPODOC
- JP2012502598
- Application
- 2011527007
- Application, DOCDB
- 2011527007
- Application, EPODOC
- JP20110527007
Titles2
- Japanese
- マルチ・キャリア動作における物理ランダム・アクセス・チャネル(PRACH)送信
- English
- Physical Random Access Channel (PRACH) transmission in multi-carrier operation
Classification
- CPC, 7
- H04L5/0053
- H04W72/0453
- H04W74/0833
- H04L5/0048
- H04L5/0094
- H04W74/0866
- H04W24/10
- IPC, 1
- H04W74 08
Designated states4
- Regional, 4
- Zimbabwe
- Turkmenistan
- Türkiye
- Togo