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CN101192872B - Inter-relay interference adjustment method based on sub-channel pattern - Google Patents

Inter-relay interference adjustment method based on sub-channel pattern Download PDF

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Publication number
CN101192872B
CN101192872B CN2006101456036A CN200610145603A CN101192872B CN 101192872 B CN101192872 B CN 101192872B CN 2006101456036 A CN2006101456036 A CN 2006101456036A CN 200610145603 A CN200610145603 A CN 200610145603A CN 101192872 B CN101192872 B CN 101192872B
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China
Prior art keywords
relay station
station
interference
interfering
sub
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Expired - Fee Related
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CN2006101456036A
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Chinese (zh)
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CN101192872A (en
Inventor
郑旭峰
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Beijing Samsung Telecommunications Technology Research Co Ltd
Samsung Electronics Co Ltd
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Beijing Samsung Telecommunications Technology Research Co Ltd
Samsung Electronics Co Ltd
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Priority to CN2006101456036A priority Critical patent/CN101192872B/en
Publication of CN101192872A publication Critical patent/CN101192872A/en
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  • Radio Relay Systems (AREA)

Abstract

The present invention relates to a method for adjusting the interference between relay stations based on the sub-channel pattern, which comprises the steps that: if the present interference level of an interfered subscriber station surpasses the high threshold value or is less than the low threshold, the 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 method for adjusting the interference between relay stations based on the sub-channel pattern provided by the present 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

Relay station adjusting method for interference between based on sub-channel pattern
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:
If the present interference level of disturbed subscriber board exceeds high threshold or is lower than low threshold, then 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 specific implementation method such as Fig. 2 institute are not.
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 of RelayA and RelayB (permutat ionpattern) is different, interference between the corresponding subchannel of RelayA and RelayB is randomized, 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-Al 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 (2)

1.一种基于子信道图案的中继站间干扰调整方法，包括：1. A method for adjusting interference between relay stations based on a sub-channel pattern, comprising: 如果被干扰用户台确定目前的干扰水平超出高门限或低于低门限，则将干扰水平告知归属中继站；If the interfered subscriber station determines that the current interference level exceeds the upper threshold or is lower than the lower threshold, then inform the home relay station of the interference level; 归属中继站将被干扰用户台和干扰水平告知基站BS；The home relay station notifies the base station BS of the interfered subscriber station and the interference level; 基站基于干扰中继站和归属中继站的信息确定功率调整图案；The base station determines a power adjustment pattern based on the information of the interfering relay station and the home relay station; 干扰中继站根据基站BS确定的功率调整图案调整在时频块中的发射功率，The interfering relay station adjusts the transmit power in the time-frequency block according to the power adjustment pattern determined by the base station BS, 其中，当确定干扰水平超出高门限时，所述干扰中继站减小功率调整图案中时频块的发射功率，直至关闭功率调整图案中时频块的发射；当确定干扰水平低于低门限时，所述干扰中继站增加功率调整图案中时频块的发射功率。Wherein, when it is determined that the interference level exceeds the high threshold, the interfering relay station reduces the transmission power of the time-frequency blocks in the power adjustment pattern until the transmission of the time-frequency blocks in the power adjustment pattern is turned off; when it is determined that the interference level is lower than the low threshold, The interfering relay station increases the transmit power of the time-frequency blocks in the power adjustment pattern. 2.根据权利要求1所述的方法，其特征在于所述信息包括以下信息之一，或者任意组合：2. The method according to claim 1, wherein the information includes one of the following information, or any combination thereof: 干扰中继站和被干扰用户台(MS-A1)的位置；The location of the interfering relay station and the interfered subscriber station (MS-A1); 干扰中继站的干扰发射功率；Interfering transmit power of the interfering relay station; 干扰中继站和归属中继站的子信道图案；subchannel patterns of the interfering relay station and the home relay station; 干扰中继站内用户台的接收情况。Interfering with the reception of subscriber stations in repeater stations.
CN2006101456036A 2006-11-22 2006-11-22 Inter-relay interference adjustment method based on sub-channel pattern Expired - Fee Related CN101192872B (en)

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CN101192872B true CN101192872B (en) 2011-08-03

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
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
US9294939B2 (en) 2010-06-21 2016-03-22 Nokia Solutions And Networks Oy Method and apparatus for reducing interference
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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1360410A (en) * 2000-12-22 2002-07-24 华为技术有限公司 Signal-interference ratio (SIR) threshould regulation method for power control
CN1640007A (en) * 2001-11-20 2005-07-13 高通股份有限公司 Reverse link power controlled repeater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1360410A (en) * 2000-12-22 2002-07-24 华为技术有限公司 Signal-interference ratio (SIR) threshould regulation method for power control
CN1640007A (en) * 2001-11-20 2005-07-13 高通股份有限公司 Reverse link power controlled repeater

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