WO2008124983A1 - Procédé de limitation de brouillage sur la même fréquence par programmation de l'organisation de réseau - Google Patents

Procédé de limitation de brouillage sur la même fréquence par programmation de l'organisation de réseau Download PDF

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Publication number
WO2008124983A1
WO2008124983A1 PCT/CN2007/003418 CN2007003418W WO2008124983A1 WO 2008124983 A1 WO2008124983 A1 WO 2008124983A1 CN 2007003418 W CN2007003418 W CN 2007003418W WO 2008124983 A1 WO2008124983 A1 WO 2008124983A1
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Prior art keywords
cell
users
interference
user
cells
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PCT/CN2007/003418
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English (en)
Chinese (zh)
Inventor
Sean Cai
Ying Liu
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Zte Corporation
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Publication date
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Publication of WO2008124983A1 publication Critical patent/WO2008124983A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present invention relates to a co-channel interference suppression method for a wireless communication system, and more particularly to a co-channel interference suppression method in an OFDM system. Background technique
  • the interferences of wireless and mobile communication systems mainly include co-channel interference, adjacent-frequency interference, out-of-band interference, and intermodulation interference.
  • the co-channel interference of the system means that some or all cells in the network use the same frequency point for data transmission, and there is mutual signal interference between the cells.
  • Co-channel interference can be generally classified into small-area interference, small-area interference, interference between different communication systems, interference between different operators, and interference caused by system equipment.
  • the interference in the small area mainly includes multipath interference, near-far effect and multiple access interference.
  • the generation of these disturbances is determined by the time-varying nature of the wireless channel and the delay and fading during electromagnetic wave propagation. It can be alleviated by modulation and demodulation technology, power control technology, and the like.
  • Inter-cell interference is an inherent problem in cellular mobile communication systems.
  • the traditional solution is to use frequency reuse.
  • Common multiplexing coefficients are 1, 3, and 7, etc.
  • a multiplexing factor of 1 means that neighboring cells use the same frequency resource, and the interference at the cell edge is very serious.
  • a higher multiplexing factor (3 or 7) can effectively suppress ICI, but the spectral efficiency will be reduced to 1/3 or 1/7.
  • Wireless mobile communication systems are increasingly demanding spectrum efficiency, and it is expected that intra-frequency networking can be performed to improve system efficiency.
  • intra-frequency networking if the co-channel interference problem between cells cannot be effectively solved, the spectrum efficiency of the system will be reduced, the system coverage will be reduced, and the system traffic will be lost.
  • Interference randomization can not reduce the energy of interference, but can randomize the interference into "white noise", thus suppressing the harm of ICI, so it is also called “interference whitening”.
  • Methods for interference randomization include: scrambling, interleaving multiple access IDMA, and frequency hopping.
  • the interference cancellation technology is derived from multi-user detection technology, which can demodulate and solve the signal of the interfering cell.
  • the code then copies and subtracts the ICI from the cell.
  • IDMA cancellation technology based on IDMA means that different interleaving patterns are generated by a pseudo-random interleaver and allocated to different cells.
  • the receiver can deinterleave the target signal and the interference signal by using different interleaving patterns, and then respectively, and then the target signal and the interference signal are respectively solved, and then Perform ICI elimination.
  • This combination of technology and iterative receiver technology yields significant performance gains.
  • the advantage of ICI cancellation compared with ICI coordination is that there is no limit to the frequency resources at the cell edge, and the cell edge spectral efficiency is 1 and the total spectral efficiency is 1. However, the computational complexity is high, which increases the requirements for the receiver's processing power.
  • Interference coordination is also referred to as "soft frequency reuse,” or “partial frequency reuse,” and IEEE 802.20 MBFDD / MBTDD uses this technology, and LTE is also considering this approach.
  • This method divides the frequency resources into several multiplexed sets. Users in the cell center can use lower power transmission and reception. Even if they occupy the same frequency, they will not cause strong ICI, so they are allocated at the reuse coefficient.
  • the drawback of this technique is that the frequency resources at the cell edge are limited, and it is difficult to support a large number of users and a high data rate.
  • the technical problem to be solved by the present invention is to provide a method for performing interference suppression in the same frequency group by scheduling, and to solve the problem of how to improve the spectrum efficiency of the wireless mobile communication system and solve the interference problem in the same frequency networking in the prior art.
  • the present invention provides a method for performing interference suppression in the same frequency network by scheduling, which includes the following steps:
  • the interference indicator parameter of each cell user is obtained and summarized from each cell by using a main control module.
  • the cell obtains the interference indicator parameter of the user in the cell, and determines the potential interference situation of each user; further, the method according to the present invention, wherein the interference The indicator parameter includes a combination of one or more of the following: an average transmit power of each user in the cell, an average link quality indicator, and an average link rate indication; further, the method according to the present invention, wherein, step (2)
  • the user is divided into two types: an interfering user and a non-interfering user; in step (3), the resources allocated for other cell interfering users are staggered in the same system time-frequency resource space; further, the method according to the present invention
  • the step (2) when classifying users, according to users in each cell to users in other cells
  • the potential interference conditions are randomly arranged, and then classified according to a set threshold value, and the user is divided into an interference user and a non-interfering user;
  • the user is divided into the interfering user and the non-interfering user.
  • the method of the present invention where the cell and other cells are not The interfering user occupies the same system time-frequency resource space, and the interfering user of the cell and other cells divides the remaining system time-frequency resource space; further, the method according to the present invention, where the cell and other cells are The interfering user occupies resources of different blocks in the system time-frequency resource space, and the non-interfering user of the cell and other cells occupy the remaining system time-frequency resource space; further, the method according to the present invention, wherein, step (3) The cells are sequentially scheduled according to the user ranking result, and the resources allocated by the local cell and other cells for the user occupy all the system time-frequency resource space, but when the different cells are mapped at the physical layer (that is, the physical layer resources are allocated to the user).
  • the method according to the present invention Starting from different initial positions of time or frequency, in the same time or frequency order, when the mapping reaches the end of the resource space, and then back to the head end of the resource space for mapping; further, the method according to the present invention, wherein The order in which the users in each cell sort the potential interferences of users in other cells is from strong to weak; further, the method according to the present invention, wherein the initial time of the current cell and other cells Or the interval between the frequency positions is 1/N of the time domain or the frequency domain length of the system time-frequency resource space, where N is the number of the cell and the other cell; further, the method according to the present invention, wherein the other cell The neighboring cell of the cell, or the neighboring cell and the non-adjacent cell that cause interference to the cell; further, the method of the present invention, wherein the system time-frequency resource space is an OFDMA system radio interface physical frame , or a partial time-frequency region in the frame for resource allocation.
  • the method of the present invention can effectively overcome inter-cell co-channel interference, improve edge user reception performance, increase cell coverage, and improve system traffic and spectrum efficiency.
  • 1 is a network configuration in a typical wireless mobile communication system described in the prior art, and when inter-frequency networking is performed, relatively serious inter-cell interference occurs;
  • FIG. 2 is a schematic diagram of frame scheduling of an OFDMA system at a certain time
  • 3 is a schematic diagram of frame scheduling of an OFDMA system at a certain time
  • FIG. 4 is a schematic diagram of an interference suppression scheduling mode 1 according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of interference suppression scheduling mode 2 according to an embodiment of the present invention
  • FIG. 6 is an interference according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of an interference suppression scheduling manner 4 according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of an interference suppression scheduling manner 5 according to an embodiment of the present invention
  • the embodiment is a schematic diagram of the interference suppression scheduling mode 6.
  • the present invention is mainly directed to a problem of system performance degradation caused by inter-cell interference in a wireless communication system in a wireless communication system, and a related solution for interference suppression is proposed, which aims to reduce inter-cell interference and increase by effective interference suppression technology. Coverage and flow, improve the spectral efficiency of the system.
  • each cell classifies or ranks potential interferences of other cells according to users in the cell; (2) each cell performs scheduling based on user classification or ordering, and The users with high potential interference are interleaved in the same system time-frequency resource space of the cell and other cells, that is, users who have potential interference with each other are interleaved in the same system time-frequency resource space of the respective cells.
  • the other cell may be a neighboring cell of the local cell, or may be a neighboring cell and a non-adjacent cell that cause interference to the local cell, and may be determined according to the configuration or determined according to the detected interference information.
  • the embodiments of the present invention are further described in the following, but are not intended to limit the present invention.
  • the interference suppression method of the present invention is applied to a wireless communication system, and the system specifically includes the following parts:
  • At least two base stations each of which transmits downlink and uplink control information (including scheduling information) to terminals within its cell range
  • the uplink and downlink control information refers to the information transmitted between the base station and the terminal; the control information related to the interference suppression is mainly: the downlink scheduling information sent by the base station, the uplink scheduling information sent by the base station, and the related terminal information sent by the base station. Request information.
  • terminal SS1 and SS2 Located within the coverage of BS1; terminals SS3 and SS4 are located within the coverage of BS2.
  • SS1 and SS3 are located at the edge of the cell, and data transmission is generally performed with a relatively large uplink transmission power. In the same frequency networking, more serious inter-cell interference will occur.
  • BS1 and BS2 in the figure are co-frequency networking.
  • SS1 and SS3 are respectively allocated on the uplink burst 1 of BS1 and BS2 for data transmission, since the time-frequency regions of the two bursts have overlapping portions, the two SSs received by the two BSs at the position are The uplink signals will interfere with each other, resulting in a decrease in the received signal-to-noise ratio, thereby increasing the bit error rate, reducing the transmission efficiency, and even causing dropped calls. Ultimately, the coverage and flow of the entire system is reduced.
  • Each cell base station transmits downlink and uplink control information (including scheduling information);
  • each base station receives uplink data of the corresponding terminal in the cell
  • Each cell classifies or ranks the strength of potential interference of users in neighboring cells according to users in each cell;
  • the following metrics can be used to measure the strength of potential interference for users in neighboring cells in each cell:
  • a main control module may be configured to perform information interaction with each cell base station to obtain user interference indicator parameters of each cell; and then, by using a main control module to summarize interference parameter parameters and scheduling information of users in each cell, the potential interference situation of each user is determined.
  • various methods described in the Chinese Patent Application No. 200710073801.0, the "Same Frequency Interference Suppression Method for a Wireless Communication System", which is filed by the present applicant can be used.
  • the present invention focuses on how to suppress interference caused by users with large interference to adjacent cells, and does not limit how to classify or sort users.
  • each cell can also be classified or sorted according to the configured threshold independently.
  • the user's classification can be as follows:
  • Method 1 According to the strength of potential interference of users in neighboring cells in each cell, they are randomly arranged, and then divided into several categories by a certain threshold. For example, by setting a threshold, they are divided into two categories: interference For users and non-scrambled users, the following will be further scheduled according to the classification.
  • Method 2 According to the user's potential interference in the neighboring cell according to the strength of the user in each cell, and then divided into several categories by a certain threshold value, for example, by setting a threshold, it is divided into two categories: Disturb users and non-interfering users.
  • Method 3 Sort the strength of potential interference of users in the neighboring cell according to the user in each cell, and then classify according to the preset number of interference or non-interfering users, for example, the maximum number of interfering users in the current cell setting For example, the maximum number of non-interfering users is 15. In the order of potential interference from strong to weak, the first 10 users are selected as the interference users, and the last 15 users are selected as non-interfering users.
  • interfering users mentioned in this document refer to users who may generate strong interference to neighboring cell users; non-interfering users refer to users who are less likely to generate strong interference to neighboring cell users. Of course, in other embodiments, it can be divided into three or more categories.
  • Each cell then schedules the user based on user classification or ordering to achieve the purpose of suppressing or eliminating co-channel interference.
  • the three sub-pictures in the figure respectively correspond to the resource space of three adjacent cells/sector i at the same time, and may be part of the time-frequency area of the physical frame or frame of the OFDMA system for resource allocation.
  • the resource space of each cell/sector is divided into two zones, zonel and zone2, and the zone zonel is frequency-divided, that is, divided into multiple frequency bands, each cell uses only one of the frequency bands, and the cell/sector 1 is used. It is zonel 1, zone/sector 2 is zone21, and cell/sector 3 is zone31. Each cell/sector uses all resources of zone zone2.
  • the interfering users of the cell i are allocated in the area zoneil, and the area zoneil is interleaved by frequency division, so that each cell occupies a part of the resource space in the area zonel, leaving The other unoccupied resource space is used by the interfering users of the neighboring cells, so that each cell does not conflict with each other and avoids interference; at the same time, the non-interfering users are allocated in the same area zone 2, and both occupy the area zone 2 The entire resource space.
  • the frequency of the zoneil of the neighboring cell/sector can ensure that interference cannot occur between users who may generate large interference in each cell, thereby achieving the purpose of interference suppression.
  • the user assigned in Zonei2 is a user who is unlikely to generate large interference. Therefore, the area occupies the entire bandwidth, and the frequency reuse coefficient of the allocation time is 1, which can improve the bandwidth efficiency of the system.
  • the size division of the area can be adaptively adjusted according to the interference user load condition of each cell to improve the bandwidth efficiency when the interference of the user load is small.
  • the three sub-pictures in the figure correspond to the resource space of three adjacent cells/sector i at the same time.
  • the resource space of each cell/sector is divided into two zones, zonel and zone2, and the zone zonel is divided into multiple time slots.
  • Each cell uses only one of the time slots, and the cell/sector 1 uses Zonel 1 , cell/sector 2 uses zone 21 and cell/sector 3 uses zone 31.
  • Each cell/sector uses all resources of zone zone2.
  • the interfering users of the cell i are allocated to the area zoneil, and the area zones are interleaved by time division.
  • each cell occupies a part of the resource space in the area zonel, leaving other unoccupied resource space to the phase.
  • the neighboring cell is used by the interfering user, so that each cell does not conflict with each other and avoids interference; at the same time, all non-interfering users are allocated in the same area zone2, and occupy the entire resource space on the zone zone2.
  • the user assigned in Zonei2 is a user who is unlikely to generate large interference. Therefore, the area occupies the entire bandwidth, and the frequency reuse coefficient of the allocation time is 1, which can improve the bandwidth efficiency of the system.
  • the size division of the area can be adaptively adjusted according to the interference user load condition of each cell to improve bandwidth efficiency when the interference user load is small.
  • the three sub-pictures in the figure correspond to the resources of three adjacent cells/sectors i at the same time.
  • Source space The resource space of each cell/sector is divided into two zones, zoneil and zonei2, by frequency division, in which the zone zoneil of each cell/sector is staggered throughout the time domain, and zonei2 is the remaining zone other than zoneil, each The resource space of the cell/sector does not contain free areas that cannot be used.
  • the interfering users of the cell i are allocated on the area zoneil, and the area zoneil is distributed over the entire resource space by time division, and the area zoneil of each cell does not conflict with each other; meanwhile, the non-interfering users are allocated in the area zonei2 .
  • the intra-frequency networking due to the zoneil time division of the neighboring cell/sector, it can be ensured that there is no interference between users that may cause large interference in each cell, and the interfering user of the cell i may only be different from the cell j. Interfering users are scheduled at the same time. In this way, the purpose of interference suppression is achieved, and the frequency reuse of all transmission time of the system is guaranteed to be 1, which further improves the bandwidth utilization.
  • Method 4 As shown in Figure 7, similar to the method of Method 3, the same effect can be achieved by changing the time division that interferes with the user into a frequency division relationship.
  • the three subgraphs in the figure correspond to the resource space of three adjacent cells/sector i at the same time.
  • the resource space of each cell/sector is divided into two zones, zoneil and zonei2, by frequency division, where the zone zoneil of each cell/sector is staggered throughout the frequency domain, and zonei2 is the zone other than zoneil, each The resource space of the cell/sector does not contain free areas that cannot be used.
  • the interfering users of the cell i are allocated on the area zoneil, and the area zoneil is distributed in the entire resource space according to the frequency division, and the area zoneil of each cell does not conflict with each other; meanwhile, the non-interfering users are allocated in the area. Zonei2.
  • the intra-frequency networking due to the frequency division of the neighboring cells/sectors, it is ensured that there is no interference between users that may cause large interference in each cell, and the interfering users of the cell i may only be related to the cell j. Non-interfering users are scheduled at the same frequency division.
  • the three sub-pictures in the figure correspond to the resource space on three adjacent cells/sector i at the same time.
  • each cell/sector is no longer divided into fixed areas.
  • the order is from strong to weak (or weak to strong).
  • Users when mapping in the actual physical layer, different cells start from different initial time positions in the same system resource space and perform physical layer mapping in chronological order (small to large or large to small), and the mapping reaches the end of the resource space. At the end, it is transferred back to the head end of the resource space for mapping, so that the allocation can eventually fill the entire resource space.
  • the interval between the initial time positions of the neighboring cell physical layer mapping is the resource space length /n, so that the maximum interfering users occupying the resource space length /n between the cells will not affect each other.
  • This method does not need to divide the area, reduces the control message overhead of the area description, and achieves the same bandwidth utilization and interference suppression effect as the third method in a more flexible manner.
  • Method 6 As shown in Figure 9, similar to the method of Method 5, only the time division that interferes with the user is changed into a frequency division relationship, and the time offset becomes a frequency offset, and the same effect can be achieved.
  • the three sub-pictures in the figure correspond to the resource space on three adjacent cells/sector i at the same time.
  • each cell/sector is no longer divided into fixed areas.
  • the user's potential interference to the users in the neighboring cell is ranked according to the strength of the user in each cell, and the order is from strong to weak (or weak to strong).
  • the users are tuned in this order.
  • different cells start with different initial frequency positions in the resource space and perform physical layer mapping according to the frequency order (large to small or small to large).
  • the mapping reaches the end of the resource space, it returns. Switch back to the head end of the resource space for mapping to ensure that the allocation eventually fills the entire resource space.
  • the interval between the initial frequency positions of the physical layer mappings of the n neighboring cells is the resource space length /n, it can be ensured that the maximum interfering users occupying the resource space length /n between the cells do not affect each other.
  • Method 7 It is also possible to combine the potential interference of the users of each cell and the Qos requirements, and then schedule according to Method 5 or Method 6 above.
  • Each cell performs power reduction, rate reduction, and link adaptation processing for the primary interfering terminal with lower Qos requirements, and then processes it as a non-interfering user.
  • the invention provides a method for interference suppression in a wireless communication system, which can effectively overcome inter-cell co-channel interference, improve edge user reception performance, increase cell coverage, improve system traffic and spectrum efficiency, and therefore has industrial practicality. Sex.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Procédé de limitation de brouillage sur la même fréquence par programmation, selon les étapes suivantes: (1) acquisition de l'environnement de brouillage potentiel des utilisateurs dans chaque cellule pour les utilisateurs dans les autres cellules; (2) classification ou tri des utilisateurs dans chaque cellule sur la base de cet environnement; (3) selon le résultat de cette opération (2), programmation des utilisateurs dans chaque cellule de sorte que les ressources allouées pour un ou plusieurs utilisateurs ayant le brouillage potentiel maximum pour chaque cellule (cellule locale et autres cellules) soient échelonnées mutuellement dans le même espace de ressources temps-fréquence du système. On peut ainsi limiter le brouillage sur la même fréquence entre cellules, promouvoir la performance de réception pour un utilisateur marginal, augmenter la couverture de cellule et favoriser le débit système et l'efficacité spectrale.
PCT/CN2007/003418 2007-04-11 2007-12-03 Procédé de limitation de brouillage sur la même fréquence par programmation de l'organisation de réseau WO2008124983A1 (fr)

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CN 200710090573 CN101286786B (zh) 2007-04-11 2007-04-11 一种通过调度进行同频组网干扰抑制的方法
CN200710090573.8 2007-04-11

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102685756A (zh) * 2011-03-11 2012-09-19 鼎桥通信技术有限公司 一种降低hsdpa用户同频干扰的方法
CN101877853B (zh) * 2009-04-28 2013-03-06 鼎桥通信技术有限公司 一种降低同频干扰的方法

Families Citing this family (14)

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WO2010083735A1 (fr) * 2009-01-23 2010-07-29 华为技术有限公司 Procédé d'ajustement, système et centre de configuration de microstation de base pour trame de données entre microstation de base et macrostation de base
CN104918332A (zh) 2009-02-02 2015-09-16 三菱电机株式会社 移动体通信系统
CN101877854B (zh) * 2009-04-28 2013-01-16 鼎桥通信技术有限公司 一种降低同频干扰的方法
CN102014507B (zh) * 2009-09-04 2013-03-27 普天信息技术研究院有限公司 一种hsupa系统中用户的上行资源调度方法
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CN101951644B (zh) * 2010-09-29 2013-08-07 华为技术有限公司 降低干扰的方法和装置
GB2485387B (en) * 2010-11-12 2013-10-02 Intellectual Ventures Holding 81 Llc Wireless communication system, communication unit, and method for scheduling
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CN102655681B (zh) * 2011-03-01 2014-09-03 普天信息技术研究院有限公司 一种调度方法
CN102223679A (zh) * 2011-07-12 2011-10-19 电信科学技术研究院 一种处理负载拥塞的方法和设备
CN102595417B (zh) * 2012-02-22 2015-06-24 电信科学技术研究院 一种小区资源规划方法及系统
WO2014101236A1 (fr) * 2012-12-31 2014-07-03 华为技术有限公司 Procédé de coordination d'interférences dans un canal de liaison montante et station de base
CN106604300B (zh) * 2016-11-10 2020-01-10 北京邮电大学 一种基于全双工和大规模天线技术的小小区基站自供能自回传方法
CN107733456B (zh) * 2017-11-08 2020-09-01 河海大学常州校区 一种降低计算复杂度的方法以及串行干扰消除检测接收机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1753322A (zh) * 2004-09-24 2006-03-29 大唐移动通信设备有限公司 时隙码分多址系统多小区联合检测方法
CN1867154A (zh) * 2005-05-17 2006-11-22 上海原动力通信科技有限公司 应用于同频组网的波束赋形实现方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1917378A (zh) * 2005-08-18 2007-02-21 财团法人资讯工业策进会 抑制无线通讯系统中同频干扰的方法
CN1921322B (zh) * 2005-08-26 2010-07-21 上海原动力通信科技有限公司 时隙码分多址系统的干扰抑制方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1753322A (zh) * 2004-09-24 2006-03-29 大唐移动通信设备有限公司 时隙码分多址系统多小区联合检测方法
CN1867154A (zh) * 2005-05-17 2006-11-22 上海原动力通信科技有限公司 应用于同频组网的波束赋形实现方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101877853B (zh) * 2009-04-28 2013-03-06 鼎桥通信技术有限公司 一种降低同频干扰的方法
CN102685756A (zh) * 2011-03-11 2012-09-19 鼎桥通信技术有限公司 一种降低hsdpa用户同频干扰的方法
CN102685756B (zh) * 2011-03-11 2014-12-03 鼎桥通信技术有限公司 一种降低hsdpa用户同频干扰的方法

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