JP2009112041A - 無線通信システムのデッドロックを避けるための強化ポーリング法 - Google Patents
無線通信システムのデッドロックを避けるための強化ポーリング法 Download PDFInfo
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- JP2009112041A JP2009112041A JP2008331250A JP2008331250A JP2009112041A JP 2009112041 A JP2009112041 A JP 2009112041A JP 2008331250 A JP2008331250 A JP 2008331250A JP 2008331250 A JP2008331250 A JP 2008331250A JP 2009112041 A JP2009112041 A JP 2009112041A
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- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000004891 communication Methods 0.000 title claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims abstract description 56
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- 230000008569 process Effects 0.000 abstract description 28
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/04—Scheduled access
- H04W74/06—Scheduled access using polling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
- H04L1/1685—Details of the supervisory signal the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/188—Time-out mechanisms
- H04L1/1883—Time-out mechanisms using multiple timers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
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Abstract
【解決手段】
本発明の無線通信システムにおけるポーリング法は、第一の所定期間内にポーリングを禁止する工程と、ポーリングが禁止されている間にポーリング機能を起動する工程と、第一の所定期間の後に、送信または再送信に予定されるPDUがない、且つ、既に送信され、まだ応答されていないPDUが少なくとも一つあることを判定する工程と、PDUを選択し再送信に予定し、ポーリング機能を実行する工程とを有する。
【選択図】 図9
Description
前述の通信規約には、3種類の可能なデータ送信モード、即ち、透過モード(Transparent Mode:TM)、確認モード(Acknowledge Mode:AM)と非確認モード(Unacknowledge Mode:UM)がある。本発明はAMのみに関連するので、ここで述べる従来技術の範囲はAM送信に関連する背景技術に限る。
ステップ1001:システムは、新しい送信PDUがあるかを確認する。あれば、プロセスはステップ1010に進み、なければ、ステップ1002に進む。
ステップ1002:システムは、否定応答された送信PDUがあるかを確認する。あれば、プロセスはステップ1011に進み、なければ、ステップ1003に進む。
ステップ1003:システムは、ポーリング機能が起動されているかを確認する。はい(Yes)であれば、プロセスはステップ1004に進み、いいえ(No)であれば、ステップ1017にて終了する。
ステップ1004:システムは、ポーリングが禁止されるかを確認する。ポーリングが禁止されない場合、プロセスはステップ1005に進み、他の場合、ステップ1017にて終了する。
ステップ1005:ポーリング機能が起動され、次の送信PDUのポールビットは1に設定される。
ステップ1006:システムは、送信または再送信に予定されるPDUがないか、また、既に送信された、まだ応答されていない(肯定または否定)PDUがあるかを確認する。はい(Yes)であれば、プロセスはステップ1007に進み、いいえ(No)であれば、ステップ1017にて終了する。
ステップ1007:システムは、ステップ1003に確認されたポーリング機能を起動したトリガーは、“ポーリングタイマー(Poll_Timer)”であるか、或いは“タイマーに基づく(Timer_Based)”であるかをチェックする。はい(Yes)であれば、プロセスはステップ1008に進み、いいえ(No)であれば、ステップ1017にて終了する。
ステップ1008:システムは、ポールビットを持つ適切な再送信PDUを選択する。
ステップ1009:システムは、選択されたPDUを送信予定にする。プロセスはステップ1016に進む。
ステップ1010:システムは、新しいPDUを送信予定にする。プロセスはステップ1012に進む。
ステップ1011:システムは、否定応答(Negatively Acknowledge:NACKed)されたPDUを送信予定にする。
ステップ1012:システムは、ポーリング機能が起動されているかをチェックする。はい(Yes)であれば、プロセスはステップ1013に進み、いいえ(No)であれば、ステップ1015に進む。
ステップ1013:システムは、ポーリングが禁止されるかをチェックする。ポーリングが禁止される場合、プロセスはステップ1015に進み、他の場合、ステップ1014に進む。
ステップ1014:ポーリング機能が起動され、次の送信PDUのポールビットが1に設定される。
ステップ1015:ポーリング機能が起動されなく、次の送信PDUのポールビットが0に設定される。
ステップ1016:システムは、送信PDUを下位層に送信する。
ステップ1017:プロセス終了
図5は、図3と同様なシーケンスを示す図である。また図5において、図3と同じの構成要素に同じ番号を付ける。送信局の設定は、以下の五つのポーリングトリガーが有効になるように、上位層RLCにより確定される。
The Third Generation Partnership Project (3GPP) Specification, 25.322 V6.1.0 (2004−06),Radio Link Control(RLC)Protocol Specification.
20 受信局
30 AMD PDU
40 通信システム
41 送信局
42 受信局
400〜405 PDU
406、407 ステータスレポート
SN シーケンスナンバー
70 通信システム
71 送信局
72 受信局
700〜705 PDU
705a PDU
706、707 ステータスレポート
Claims (3)
- プロトコールデータユニット(PDU:Protocol Data Unit)とサービスデータユニット(SDU:Service Data Unit)とを用いる無線通信システム用ポーリング法であって、
第一の所定期間内にポーリングを禁止する工程と、
前記ポーリングが禁止されている間にポーリング機能を起動する工程と、
前記第一の所定期間の後に、送信または再送信に予定される前記PDUがない、且つ、既に送信され、まだ応答されていないPDUが少なくとも一つあることを判定する工程と、
PDUを選択し再送信に予定し、前記ポーリング機能を実行する工程と、
を有する、
ポーリング法。 - 前記選択されたPDUは、少なくとも一回送信された、最後のPDUである、
請求項1に記載のポーリング法。 - 前記選択されたPDUは、送信された後に、送信ウィンドウのサイズが前記通信システムのプロトコールデータユニットにおけるシーケンスナンバースペース値の半分以下になった際に応答されていないPDUである、
請求項1に記載のポーリング法。
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US52232404P | 2004-09-15 | 2004-09-15 | |
US60/522,324 | 2004-09-15 |
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JP2008331253A Active JP4850896B2 (ja) | 2004-09-15 | 2008-12-25 | 無線通信システムのデッドロックを避けるための強化ポーリング法 |
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EP (6) | EP1973261B1 (ja) |
JP (6) | JP4355693B2 (ja) |
KR (1) | KR100673509B1 (ja) |
CN (6) | CN101330511B (ja) |
AT (6) | ATE471004T1 (ja) |
DE (6) | DE602005021997D1 (ja) |
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