CN101192872A - Adjusting method for interference between relay stations based on sub-channel pattern - Google Patents
Adjusting method for interference between relay stations based on sub-channel pattern Download PDFInfo
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- CN101192872A CN101192872A CNA2006101456036A CN200610145603A CN101192872A CN 101192872 A CN101192872 A CN 101192872A CN A2006101456036 A CNA2006101456036 A CN A2006101456036A CN 200610145603 A CN200610145603 A CN 200610145603A CN 101192872 A CN101192872 A CN 101192872A
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Abstract
The invention relates to a method for adjusting the interference between relay stations based on the sub-channel pattern, which comprises the steps that: an interfered subscriber station determines whether the present interference level surpasses the threshold value; if the present interference level surpasses the threshold value, the present interference level is informed to an assignment relay station; the assignment relay station informs a base station BS of the interfered subscriber station and the interference level; the base station determines the power adjustment pattern according to the interferential relay station and the assignment relay station; the interferential relay station adjusts the emissive power in a time-frequency block according to the power adjustment pattern that determined by the base station BS. The invention effectively realizes the interference adjustment between the relay stations, and simultaneously can be implemented simply and conveniently without changing the present system terminal and can keep the compatibility with the present system.
Description
Technical field
The present invention relates to the multi-carrier communications systems of OFDMA, particularly based on the relay station adjusting method for interference between of sub-channel pattern.
Background technology
In the relay system, each relay station (RS) under same base station (BS) can send the subscriber board in its overlay area (MS) simultaneously.In order to improve the availability of frequency spectrum, each RS adopts identical running time-frequency resource to send usually, that is to say that the multiplexing factor between each RS is 1.
Because the multiplexing factor is 1, when having improved the availability of frequency spectrum, also can improve the interference level of system, the particularly interference level of the forntier region between the RS, as shown in Figure 1.Therefore need to adopt additional interference mitigation measure for this regional subscriber board (MS).
The present interference mitigation problem on RS border, mainly take: multi-antenna technology, technology such as repeated encoding solve, and have certain effect, but the complexity of system can improve, simultaneously and existing system compatible poor.
Summary of the invention
The purpose of this invention is to provide a kind of relay station adjusting method for interference between based on sub-channel pattern (permutation pattern).
For achieving the above object, a kind of relay station adjusting method for interference between based on sub-channel pattern comprises:
Disturbed subscriber board determines whether present interference level exceeds high or low thresholding, if exceed thresholding, then present interference level is informed the ownership relay station;
The ownership relay station is informed base station BS with disturbed subscriber board and interference level;
Power adjustment pattern is determined based on the information of disturbing relay station and ownership relay station in the base station;
The power adjustment pattern that disturbs relay station to determine according to base station BS is adjusted at the transmitting power in the time-frequency piece.
The present invention has effectively realized the interference adjustment between relay station; Realize easyly simultaneously, do not need to change the existing systems terminal, can keep compatibility with existing system.
Description of drawings
Fig. 1 disturbs schematic diagram between relaying (Relay) is stood;
Fig. 2 is an OFDMA system sub-channels pattern schematic diagram;
Fig. 3 is based on the schematic diagram of interference elimination method between the relay station of sub-channel pattern;
Fig. 4 is based on the flow chart of the relay station adjusting method for interference between of sub-channel pattern.
Embodiment
In the present invention, we have proposed a kind of based on interference coordination schemes between the relay station of sub-channel pattern (permutationpattern).
Sub-channel pattern (permutationpattern) is to realize multiple access in the OFDMA system (for example IEEE802.16e), one of main method of differentiate between subscriber stations, and the specific implementation method is as shown in Figure 2.
In RelayA, the sub-channel pattern of time-frequency piece is shown in the first half among Fig. 2, and subchannel can adopt the following method of salary distribution: subscriber board MS-A1 uses subchannel I; Subscriber board MS-A2 uses subchannel II, by that analogy.
In RelayB, the sub-channel pattern of time-frequency piece is shown in Fig. 2 the latter half, and subchannel can adopt the following method of salary distribution: subscriber board MS-B1 uses subchannel I; Subscriber board MS-B2 uses subchannel II, by that analogy.
Can notice from figure: the sub-channel pattern (permutationpattern) of RelayA and RelayB is different, and the interference between the corresponding subchannel of RelayA and RelayB is randomized, and disturbs the influence that causes for communication thereby reduce.
Be positioned at the MS-A1 that relay station RelayA covers borderline region, be subjected to bigger interference from RelayB.By analyzing the sub-channel pattern of RelayA and RelayB, we can find: if disturbing relay station (interfering RS), be that RelayB is corresponding in the pairing time-frequency lattice of the sub-channel pattern that MS-A1 adopted, reduce transmitting power until closing emission, for disturbed subscriber board (interfered MS), the interference that is MS-A1 can reduce greatly, thereby has reached the purpose that reduces to disturb between relay station.
Because the sub-channel pattern of RelayA and RelayB and transmitting power can be distributed and controls by base station BS, therefore: " the relay station adjusting method for interference between of sub-channel pattern " realizes that simply the information interaction time is few.Fig. 3 is the schematic diagram of the relay station adjusting method for interference between of sub-channel pattern.
The workflow diagram of " the relay station adjusting method for interference between of sub-channel pattern " as shown in Figure 4.
1. disturbed subscriber board (MS-A1) determines whether present interference level exceeds high or low thresholding, if exceed thresholding, present interference level is informed ownership relay station (RS-A);
2. the ownership relay station is informed base station BS with disturbed subscriber board and interference level;
The base station based on the position of disturbing relay station (RS-B) and disturbed subscriber board (MS-A1), disturb relay station (RS-B) the interference transmitting power, disturb relay station (RS-B) and ownership relay station (RS-A) sub-channel pattern, disturb one of reception condition of the interior subscriber board of relay station or its combined information to determine power adjustment pattern;
4. the power that disturbs relay station RS-B to determine according to base station BS is adjusted pattern (Poweradjustment Pattern), is adjusted at the transmitting power in the time-frequency piece.
Said method can be used to subdue between relay station disturb, and adopts the method that reduces transmitting power this moment.Said method also can be used for the scene that some need increase transmitting power: for example the interference between relay station is less for a certain reason, is lower than low threshold, can partly increase transmitting power.Also can adopt said method this moment.
Claims (5)
1. relay station adjusting method for interference between based on sub-channel pattern comprises:
Disturbed subscriber board determines whether present interference level exceeds high or low thresholding, if exceed thresholding, then present interference level is informed the ownership relay station;
The ownership relay station is informed base station BS with disturbed subscriber board and interference level;
Power adjustment pattern is determined based on the information of disturbing relay station and ownership relay station in the base station;
The power adjustment pattern that disturbs relay station to determine according to base station BS is adjusted at the transmitting power in the time-frequency piece.
2. method according to claim 1 is characterized in that described information comprises one of following information, perhaps combination in any:
Disturb the position of relay station and disturbed subscriber board (MS-A1);
Disturb the interference transmitting power of relay station;
Disturb the sub-channel pattern of relay station and ownership relay station;
Disturb the reception condition of subscriber board in the relay station.
3. method according to claim 1 is characterized in that described interference relay station reduces the transmitting power that power is adjusted time-frequency piece in the pattern.
4. method according to claim 1 is characterized in that described interference relay station closes the emission that power is adjusted time-frequency piece in the pattern.
5. method according to claim 1 is characterized in that described interference relay station increases the transmitting power that power is adjusted time-frequency piece in the pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101456036A CN101192872B (en) | 2006-11-22 | 2006-11-22 | Adjusting method for interference between relay stations based on sub-channel pattern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101456036A CN101192872B (en) | 2006-11-22 | 2006-11-22 | Adjusting method for interference between relay stations based on sub-channel pattern |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101192872A true CN101192872A (en) | 2008-06-04 |
| CN101192872B CN101192872B (en) | 2011-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2006101456036A Expired - Fee Related CN101192872B (en) | 2006-11-22 | 2006-11-22 | Adjusting method for interference between relay stations based on sub-channel pattern |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867967A (en) * | 2009-04-20 | 2010-10-20 | 中兴通讯股份有限公司 | Method and device for realizing carrier aggregation |
| CN101984700A (en) * | 2010-11-08 | 2011-03-09 | 中兴通讯股份有限公司 | Power distribution method for carrier aggregation composition carriers of heterogeneous network |
| WO2011160250A1 (en) * | 2010-06-21 | 2011-12-29 | Nokia Siemens Networks Oy | Method and apparatus for reducing interference |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1149770C (en) * | 2000-12-22 | 2004-05-12 | 华为技术有限公司 | Signal-interference ratio (SIR) threshould regulation method for power control |
| EP1783926B1 (en) * | 2001-11-20 | 2010-03-31 | Qualcomm, Incorporated | Reverse link power controlled repeater |
-
2006
- 2006-11-22 CN CN2006101456036A patent/CN101192872B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867967A (en) * | 2009-04-20 | 2010-10-20 | 中兴通讯股份有限公司 | Method and device for realizing carrier aggregation |
| WO2011160250A1 (en) * | 2010-06-21 | 2011-12-29 | Nokia Siemens Networks Oy | Method and apparatus for reducing interference |
| US9294939B2 (en) | 2010-06-21 | 2016-03-22 | Nokia Solutions And Networks Oy | Method and apparatus for reducing interference |
| CN101984700A (en) * | 2010-11-08 | 2011-03-09 | 中兴通讯股份有限公司 | Power distribution method for carrier aggregation composition carriers of heterogeneous network |
| WO2012062152A1 (en) * | 2010-11-08 | 2012-05-18 | 中兴通讯股份有限公司 | Method and system for processing component carrier |
| CN101984700B (en) * | 2010-11-08 | 2014-04-09 | 中兴通讯股份有限公司 | Power distribution method for carrier aggregation composition carriers of heterogeneous network |
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| Publication number | Publication date |
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| CN101192872B (en) | 2011-08-03 |
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