JP4553893B2 - Ofdmセルラー環境においてセル間の干渉を低減するための副搬送波割当方法 - Google Patents
Ofdmセルラー環境においてセル間の干渉を低減するための副搬送波割当方法 Download PDFInfo
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- JP4553893B2 JP4553893B2 JP2006500704A JP2006500704A JP4553893B2 JP 4553893 B2 JP4553893 B2 JP 4553893B2 JP 2006500704 A JP2006500704 A JP 2006500704A JP 2006500704 A JP2006500704 A JP 2006500704A JP 4553893 B2 JP4553893 B2 JP 4553893B2
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- 238000000034 method Methods 0.000 title claims description 31
- 230000001413 cellular effect Effects 0.000 title description 5
- 230000005540 biological transmission Effects 0.000 claims description 27
- 239000000969 carrier Substances 0.000 claims description 2
- 238000010295 mobile communication Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000005562 fading Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000010267 cellular communication Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0062—Avoidance of ingress interference, e.g. ham radio channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Description
Claims (13)
- マルチセル環境のセルから、最大のセル間の干渉を有する複数個のセルを選択することと、
該最大の干渉を有する選択されたセルの各々に対して、相互排他的な副搬送波セットを選択することと、
各セルに対して、選択された相互排他的な副搬送波サブセットを割り当てることと
を含む、副搬送波割当方法であって、
割り当てられた副搬送波セットには、各副搬送波のチャネル状態によって異なる送信電力が付与され、該相互排他的な副搬送波サブセットは、無指向性アンテナと、120°方向性アンテナと、60°方向性アンテナとのうちの少なくとも1つを用いて送信され、
該方法は、
1つのセルで端末により要求される副搬送波の総数を求めることと、
該求められた副搬送波の総数を、該1つのセルに割り当てられた該選択された相互排他的な副搬送波サブセット内の有効な副搬送波の総数と比較することと、
該求められた副搬送波の総数が該有効な副搬送波の総数よりも大きい場合に、
該1つのセル内の端末のうち異なる1つの端末に、該1つのセルに割り当てられた該選択された相互排他的な副搬送波サブセット内の有効な副搬送波の各々を割り当てることであって、高い送信電力を要求する端末に第一に割り当てられる、ことと、
該1つのセル内の割り当てられていない残りの端末に、他のセルに割り当てられた選択された相互排他的な副搬送波サブセット内の副搬送波を割り当てることと
をさらに含む、方法。 - 前記最大のセル間の干渉を有するセルの個数の選択は、無線ネットワーク制御装置(RNC)により行われる、請求項1に記載の方法。
- どのようなタイプのアンテナが前記マルチセル環境で使用されているかを判断することをさらに含む、請求項1または2に記載の方法。
- 前記最大のセル間の干渉を有する選択されたセルの個数は、前記使用されているアンテナのタイプが無指向性アンテナであると判断された場合、7である、請求項3に記載の方法。
- 前記最大のセル間の干渉を有する選択されたセルの個数は、前記使用されているアンテナのタイプが120°方向性アンテナであると判断された場合、3である、請求項3に記載の方法。
- 前記最大のセル間の干渉を有する選択されたセルの個数は、前記使用されているアンテナのタイプが60°方向性アンテナであると判断された場合、2である、請求項3に記載の方法。
- 前記有効な副搬送波を割り当てることは、
前記要求された副搬送波の総数が前記1つのセル内の有効な副搬送波の総数よりも小さい場合、前記要求する端末の全てに該1つのセルの有効な副搬送波を割り当てることを含む、請求項1〜6のいずれか一項に記載の方法。 - 前記有効な副搬送波を割り当てることは、
所定の閾値よりも大きい送信電力を要求する端末から始めて端末に相互排他的な副搬送波サブセットを割り当てることを含む、請求項1〜7のいずれか一項に記載の方法。 - 各セルは、同一の全周波数帯域を使用する、請求項1〜8のいずれか一項に記載の方法。
- 前記選択された相互排他的な副搬送波サブセットは、セルの境界の近くに位置する端末に割り当てられる、請求項1〜9のいずれか一項に記載の方法。
- 1つのセルで端末により要求される副搬送波の総数を求めることと、
該求められた副搬送波の総数が前記割り当てられた相互排他的な副搬送波サブセットの個数を超えるか否かを判断することと
をさらに含む、請求項1〜10のいずれか一項に記載の方法。 - 前記判断するステップにより、前記求められた副搬送波の総数が前記割り当てられた相互排他的な副搬送波サブセットの個数よりも大きい判断された場合、
各端末による各セルに対する要求送信電力を計算することと、
最大の送信電力を要求する端末から始めて端末に相互排他的な副搬送波サブセットを割り当てることと
をさらに含む、請求項11に記載の方法。 - 前記判断するステップにより、前記求められた副搬送波の総数が前記割り当てられた相互排他的な副搬送波サブセットの個数よりも大きくないと判断された場合、
相互排他的な副搬送波サブセット内の全ての端末に相互排他的な副搬送波サブセットを割り当てることをさらに含む、請求項11に記載の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020030056951A KR100965338B1 (ko) | 2003-08-18 | 2003-08-18 | Ofdm 셀룰러 환경에서 셀간 간섭 저감을 위한부반송파 할당방법 |
PCT/KR2004/002059 WO2005018186A1 (en) | 2003-08-18 | 2004-08-17 | Sub-carrier allocation method for reducing inter-cell interference in ofdm cellular environment |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006522503A JP2006522503A (ja) | 2006-09-28 |
JP4553893B2 true JP4553893B2 (ja) | 2010-09-29 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2006500704A Expired - Fee Related JP4553893B2 (ja) | 2003-08-18 | 2004-08-17 | Ofdmセルラー環境においてセル間の干渉を低減するための副搬送波割当方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7379741B2 (ja) |
EP (1) | EP1623549A4 (ja) |
JP (1) | JP4553893B2 (ja) |
KR (1) | KR100965338B1 (ja) |
CN (1) | CN1759582B (ja) |
WO (1) | WO2005018186A1 (ja) |
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-
2003
- 2003-08-18 KR KR1020030056951A patent/KR100965338B1/ko not_active IP Right Cessation
-
2004
- 2004-06-29 US US10/877,996 patent/US7379741B2/en not_active Expired - Fee Related
- 2004-08-17 EP EP04774329A patent/EP1623549A4/en not_active Ceased
- 2004-08-17 CN CN2004800062604A patent/CN1759582B/zh not_active Expired - Fee Related
- 2004-08-17 JP JP2006500704A patent/JP4553893B2/ja not_active Expired - Fee Related
- 2004-08-17 WO PCT/KR2004/002059 patent/WO2005018186A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP1623549A4 (en) | 2006-06-14 |
JP2006522503A (ja) | 2006-09-28 |
KR100965338B1 (ko) | 2010-06-22 |
EP1623549A1 (en) | 2006-02-08 |
WO2005018186A1 (en) | 2005-02-24 |
CN1759582B (zh) | 2012-04-04 |
US7379741B2 (en) | 2008-05-27 |
CN1759582A (zh) | 2006-04-12 |
KR20050019293A (ko) | 2005-03-03 |
US20050047259A1 (en) | 2005-03-03 |
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