JP4701018B2 - 通信装置及び通信方法 - Google Patents
通信装置及び通信方法 Download PDFInfo
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- JP4701018B2 JP4701018B2 JP2005181895A JP2005181895A JP4701018B2 JP 4701018 B2 JP4701018 B2 JP 4701018B2 JP 2005181895 A JP2005181895 A JP 2005181895A JP 2005181895 A JP2005181895 A JP 2005181895A JP 4701018 B2 JP4701018 B2 JP 4701018B2
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/12—Details relating to cryptographic hardware or logic circuitry
- H04L2209/127—Trusted platform modules [TPM]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
- H04W52/225—Calculation of statistics, e.g. average or variance
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR or Eb/lo
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/005—Discovery of network devices, e.g. terminals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S707/00—Data processing: database and file management or data structures
- Y10S707/99931—Database or file accessing
- Y10S707/99933—Query processing, i.e. searching
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- Y10S707/00—Data processing: database and file management or data structures
- Y10S707/99931—Database or file accessing
- Y10S707/99933—Query processing, i.e. searching
- Y10S707/99936—Pattern matching access
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S707/00—Data processing: database and file management or data structures
- Y10S707/99931—Database or file accessing
- Y10S707/99939—Privileged access
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Description
図1は本実施形態に係わるサービスディスカバリアプリケーションを備えた通信端末の構成例を示すブロック図である。
本実施形態では、接続相手が2台以上あった場合について説明する。通信端末の構成及びプログラム構成は第1の実施形態と同様なので説明は省力する。ただし、プログラムの内容が異なるので、以下に説明する。接続相手が2台以上ある場合は、キャッシュ格納部25が保持したサービス情報を提供する機器も2台以上あることになる。この場合、例え接続していたとしても、それら複数台の相手と同時に通信しているとは限らない。
本実施の形態は、ネットワークの各機器がアドバタイズ信号を送信し合い、自己の存在またはサービスを通知し合うことにより互いの存在、サービスを管理するディスカバリプロトコルについて説明する。
12 RAM
13 CPU
14 制御部
15 RF部
16 外部インタフェース部
17 外部インタフェースモジュール
18 アンテナ部
21 ソフトウェア
22 無線部
23 サービス検索部
24 通信部
25 キャッシュ格納部
26 制御部
Claims (19)
- ネットワーク上の他の機器の存在確認機能を有する通信装置であって、
他の機器の存在と、該他の機器の存在を確認した際に取得した情報の有効期限を管理する管理手段と、
前記管理手段により管理している前記有効期限に基づいて、他の機器の存在を確認するための所定の信号を送信する送信手段と、
前記送信手段により送信した前記所定の信号の応答信号が受信されない場合に、前記所定の信号の送信出力を上げる変更手段と、
を有することを特徴とする通信装置。 - 前記所定の信号は、前記他の機器が提供するサービスを検索するための信号であることを特徴とする請求項1に記載の通信装置。
- 送信出力を変更して行った前記確認信号の送信回数を判定する判定手段と、
前記他の機器と接続状態の場合は、前記判定手段による判定に応じて、前記他の機器との通信を切断する切断手段と、
を有することを特徴とする請求項1又は2に記載の通信装置。 - ネットワーク上の他の機器の存在確認機能を有する通信装置であって、
他の機器の存在を確認する確認手段と、
前記確認手段による確認結果に応じて、送信出力を変更して前記他の機器の存在確認を行うための確認信号を送信する送信手段と、
前記確認信号に対する応答信号に基づいて、前記応答信号に含まれる情報の有効期限を管理する管理手段を有し、
前記確認手段は、前記有効期限に基づいて、前記確認信号を送信することで前記他の機器の存在の確認を行い、
前記送信手段は、前記確認手段により送信した確認信号の応答信号が受信されない場合に、送信出力を変更して確認信号を送信することを特徴とする通信装置。 - 前記送信手段は、前記有効期限に係らずに確認信号を送信することを特徴とする請求項4に記載の通信装置。
- 前記確認信号は、前記他の機器が提供するサービスを検索するための信号であることを特徴とする請求項4または請求項5に記載の通信装置。
- 送信出力を変更して行った前記確認信号の送信回数を判定する判定手段と、
前記他の機器と接続状態の場合は、前記判定手段による判定に応じて、前記他の機器との通信を切断する切断手段と、
を有することを特徴とする請求項4乃至請求項6のいずれか1項に記載の通信装置。 - ネットワーク上の他の機器に存在通知を行う通信装置であって、
前記他の機器から送信された存在通知信号に基づいて前記他の機器の存在を管理する管理手段と、
前記存在通知信号を受信したタイミングに応じて、前記通信装置の存在を通知するための存在通知信号を、送信電力を変更して送信する送信手段と、を有し、
前記管理手段は、前記他の機器から受信した存在通知信号に含まれる情報に基づいて有効期限を管理し、
前記送信手段は、存在通知信号を受信したタイミングと、前記有効期限とに応じて、送信電力の変更を決定することを特徴とする通信装置。 - 前記送信手段は、前記通信装置の存在を通知するための存在通知信号を送信後、所定期間が経過すると、次の存在通知信号を送信し、
前記他の機器から存在通知信号を受信したタイミングに応じて、前記所定時間が経過しなくとも、存在通知信号を送信することを特徴とする請求項8に記載の通信装置。 - 前記送信手段により送信出力を変更して行った存在通知信号の送信回数を判定する判定手段と、
前記他の機器と接続状態の場合は、前記判定手段による判定に応じて、前記他の機器との通信を切断する切断手段と、
を有することを特徴とする請求項8または請求項9に記載の通信装置。 - ネットワーク上の他の機器に存在通知を行う通信装置であって、
前記通信装置の存在を他の機器に通知するための所定信号を送信する送信手段と、
前記他の機器から送信された、当該他の機器の存在を通知するための所定信号に基づいて、前記他の機器の存在と、当該所定信号に含まれる情報の有効期限と、を管理する管理手段と、を有し、
前記送信手段は、前記有効期限より所定時間以上前に前記他の機器からの前記所定信号を受信した場合、前記通信装置の存在を通知するための前記所定信号を、送信電力を上げて送信することを有することを特徴とする通信装置。 - 前記送信手段は、前記有効期限が切れても前記他の機器からの前記所定信号を受信できない場合、送信電力を上げて前記所定信号を送信することを特徴とする請求項11に記載の通信装置。
- 前記送信手段は、前記所定信号を送信後、所定期間が経過すると次の所定信号を送信し、前記有効期限が切れても前記他の機器からの前記所定信号を受信できない場合、前記所定期間が経過しなくても前記所定信号を送信することを特徴とする請求項11に記載の通信装置。
- 前記送信手段により送信出力を変更して行った前記所定信号の送信回数を判定する判定手段と、
前記他の機器と接続状態の場合は、前記判定手段による判定に応じて、前記他の機器との通信を切断する切断手段と、
を有することを特徴とする請求項11から13のいずれか1項に記載の通信装置。 - ネットワーク上の他の機器の存在確認機能を有する通信装置が実行する通信方法であって、
他の機器の存在と、該他の機器の存在を確認した際に取得した情報の有効期限を管理する管理工程と、
前記管理工程において管理している前記有効期限に基づいて、他の機器の存在を確認するための所定の信号を送信する送信工程と、
前記送信工程において送信した前記所定の信号の応答信号が受信されない場合に、前記所定の信号の送信出力を上げる変更工程と、
を有することを特徴とする通信方法。 - ネットワーク上の他の機器の存在確認機能を有する通信装置が実行する通信方法であって、
他の機器の存在を確認する確認工程と、
前記確認工程における確認結果に応じて、送信出力を変更して前記他の機器の存在確認を行うための確認信号を送信する送信工程と、
前記確認信号に対する応答信号に基づいて、前記応答信号に含まれる情報の有効期限を管理する管理工程を有し、
前記確認工程では、前記有効期限に基づいて、前記確認信号を送信することで前記他の機器の存在の確認を行い、
前記送信工程では、前記確認工程において送信した確認信号の応答信号が受信されない場合に、送信出力を変更して確認信号を送信することを特徴とする通信方法。 - ネットワーク上の他の機器に存在通知を行う通信装置が実行する通信方法であって、
前記他の機器から送信された存在通知信号に基づいて前記他の機器の存在を管理する管理工程と、
前記存在通知信号を受信したタイミングに応じて、前記通信装置の存在を通知するための存在通知信号を、送信電力を変更して送信する送信工程と、を有し、
前記管理工程では、前記他の機器から受信した存在通知信号に含まれる情報に基づいて有効期限を管理し、
前記送信工程では、存在通知信号を受信したタイミングと、前記有効期限とに応じて、送信電力の変更を決定することを特徴とする通信方法。 - ネットワーク上の他の機器に存在通知を行う通信装置が実行する通信方法であって、
前記通信装置の存在を他の機器に通知するための所定信号を送信する送信工程と、
前記他の機器から送信された、当該他の機器の存在を通知するための所定信号に基づいて、前記他の機器の存在と、当該通知信号に含まれる情報の有効期限と、を管理する管理工程と、を有し、
前記送信工程では、前記有効期限より所定時間以上前に前記他の機器からの前記所定信号を受信した場合、前記通信装置の存在を通知するための前記所定信号を、送信電力を上げて送信することを特徴とする通信方法。 - 請求項15乃至請求項18のいずれか1項に記載の通信方法をコンピュータに実行させるためのコンピュータプログラム。
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CN1885777A (zh) | 2006-12-27 |
JP2007005988A (ja) | 2007-01-11 |
US8095643B2 (en) | 2012-01-10 |
US20060294227A1 (en) | 2006-12-28 |
CN100466518C (zh) | 2009-03-04 |
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