WO2000030388A1 - Procede d'attribution des canaux et systeme cellulaire - Google Patents

Procede d'attribution des canaux et systeme cellulaire Download PDF

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Publication number
WO2000030388A1
WO2000030388A1 PCT/FI1999/000945 FI9900945W WO0030388A1 WO 2000030388 A1 WO2000030388 A1 WO 2000030388A1 FI 9900945 W FI9900945 W FI 9900945W WO 0030388 A1 WO0030388 A1 WO 0030388A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell
cellular radio
radio system
neighbouring cells
cells
Prior art date
Application number
PCT/FI1999/000945
Other languages
English (en)
Inventor
Petteri Hakalin
Eija Saario
Original Assignee
Nokia Networks Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Networks Oy filed Critical Nokia Networks Oy
Priority to AU13886/00A priority Critical patent/AU1388600A/en
Priority to JP2000583282A priority patent/JP2002530958A/ja
Priority to EP99972415A priority patent/EP1131977A1/fr
Publication of WO2000030388A1 publication Critical patent/WO2000030388A1/fr
Priority to NO20012385A priority patent/NO20012385L/no

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Definitions

  • the invention relates to a method of allocating channels in a cellular radio system to terminals and a cellular radio system.
  • the allocation of a traffic channel to a given subscriber terminal generally depends on whether a radio cell has an available traffic channel at that instant or not. In other words, if said radio cell has a free traffic channel, it is allocated to the subscriber terminal when needed.
  • the GSM system Global System for Mobile Telecommunications
  • the GSM system is one example of a system where the traffic channel allocation is carried out in the above-described manner. Since the GSM system is time-divisional, to the subscriber terminal is allocated a traffic channel which comprises a time slot on a given frequency channel. Alternatively, if frequency hopping is used, the frequency channel of the traffic channel changes from one time slot to another according to a predetermined frequency hopping sequence.
  • the subscriber terminal transmits alternately on all frequency channels included in frequency hopping sequence. Consequently, when the reuse coefficient of a channel in a network using frequency hopping is less than 9, the capacity is no longer limited by available traffic channels (so-called 'hard blocking') but by interference (so-called 'soft blocking').
  • the network can thus be considered interference limited.
  • the basic idea of a so-called Dynamic HotSpot feature (DHS) is to control the traffic load of a cellular radio network employing frequency hopping on the basis of interference and hence to achieve higher network capacity.
  • the Dynamic Hotspot feature is thus used for controlling the load in an interference limited cellular radio network.
  • the channel allocation is based, for instance, on the average quality of the calls connected at said instant in the interfered cells, i.e. the quality of each cell equals the quality average of all calls in said cell.
  • the quality class of each cell is determined according to the average of the qualities of calls already connected, and this quality class of the cell determines the probabilities of getting the call through.
  • the final probability of reserving a channel is the product of the probabilities of the neighbouring cells.
  • each interfered cell must have been defined case-specifically, i.e. in order to define the interfered neighbouring cells, it has been necessary to collect information for each individual serving cell, for instance manually from the network configuration and to send said information to the channel alloca- tion process.
  • the interfered cells are not necessarily the same as the cells that have the strongest signal level in the cell where a connection will be established based on the subscriber terminal measurements. The reason for this is that method can only be utilized in measuring uplink interference which is lower in relation to the downlink interference, and it has not been possible to use the method for assessing the interfered cells with the desired accuracy.
  • the object of the invention is thus to provide a method and a cellular radio system such that the above problems can be solved. This is achieved with a solution of the invention.
  • the invention relates to a channel allocation method in a cellular radio network, which cellular radio network comprises at least one base station of a given cell, at least one subscriber terminal communicating with the base station, and neighbouring cells of the given cell and subscriber terminals communicating therewith, in which cellular radio system a request is received for allocating a traffic channel in a given cell to a sub- scriber terminal, in which cellular radio system the subscriber terminal reports the measurement results of the broadcast control channel transmitted by base stations detected by the terminal, in which method allocation of cellular radio network channels to the terminals is controlled on the basis of the mutual interference between the given cell and its neighbouring cells.
  • neighbouring cell connections receiving interference from the given cell which neighbouring cells use at least partly the same frequency set as the given cell, are defined on the basis of the measurements the subscriber terminals located in the neighbouring cells report on their strongest neighbours and on the basis of the common frequencies used by the neighbouring cells together with the given cell.
  • the invention also relates to a cellular radio system which comprises a base station of at least one given cell, at least one subscriber terminal communicating with the base station, and neighbouring cells of the given cell and subscriber terminals communicating therewith, which cellular radio system is arranged to receive a request for allocating a traffic channel in the given cell to a subscriber terminal, in which cellular radio system the subscriber terminals communicating with the base station are arranged to report neighbouring cell measurement results of the broadcast control channel transmitted by the base stations, and which cellular radio system is arranged to control allocation of cellular radio network channels to terminals on the basis of the mutual interference between the given cell and its neighbouring cells.
  • the cellular radio system is arranged to define the neighbouring cell connections receiving interference from the given cell, which neighbouring cells use at least partly the same frequency set as the given cell, on the basis of the measurements the subscriber terminals located in the neighbouring cells report on their strongest neighbours and on the basis of the common frequencies used by the neighbouring cells together with the given cell.
  • interference caused to a cell using the same frequency set is estimated, for instance, by calculating an average quality of all ongoing calls at that instant. In that case, it is assumed that all poor quality results from interference. This is not necessarily so, but poor quality may also result from the fact that a subscriber terminal is in a weak field, for instance, indoors.
  • the method of the invention in turn is based on performing the interference estimation by employing only the connections that are likely to be interfered. This is concluded by whether the subscriber terminal can hear the broadcast control channel of the interfering cell, if the answer is yes, a conclusion is drawn that also the traffic channel frequencies of said cell having co-channel or adjacent channel interference interfere with one another.
  • the functionality of the Dynamic HotSpot method can be improved in the cellular radio network.
  • the method of the invention provides a better method over the prior art for selecting interfered neighbouring cells.
  • the neighbouring cell refers to a cell which is so close to the cell whereto a traffic channel is going to be allo- cated that the new traffic channel can be assumed to affect the ongoing connections in the neighbouring cell.
  • the neighbouring cell need not necessarily be located next to the cell whereto the channel will be allocated but there can be one or more other radio cells between said cells.
  • the method of the invention advantageously utilizes a new kind of a weighting factor which can also be used for further improving the original DHS algorithm.
  • the method provides an automatic method for defining inter- fered cells for a given cell, and a ratio of poor quality to overall quality of the interfered cells. Hence the method gives a better overall picture of the interference, and so the capacity of the cellular radio network can be increased.
  • the DHS method enables very tight frequency reuse by transceivers preferably using frequency hopping without that the quality deteriorates, because a base station controller can limit the traffic load to areas where the value of the interference variable is within acceptable limits.
  • the traffic can be controlled dynamically. This characteristic is very useful, particularly when the traffic amounts increase occasionally and temporarily. Local peaks in the traffic load can thus be allowed if the quality of the interfered cells still remain on an acceptable level.
  • poor quality data is collected from the cells that are interfered by the cell to which a new call will be connected.
  • the cellular radio network does not update the list on these interfered cells.
  • the method of the invention can be used for finding out interfer- ence effects on each cell under one base station controller.
  • poor quality data was collected from all connections of the interfered cells.
  • the connection quality of only the actually interfered connections is measured.
  • the method of the invention employs a new frequency weighting factor which takes into account the situa- tion where the frequencies of the interfered cells are only partially overlapping, whereas in prior art solutions, the interference in different cells was assumed to be the same and independent of the number of common frequencies.
  • the solution of the invention can be applied to a GSM-type cellular radio network, for instance.
  • the solution does not require any changes in the current GSM specification. All necessary information is available in the base station controller.
  • the method can be adopted by amending the software alone, i.e. by updating network device software. The actual equipment need not be changed.
  • Figure 1 shows a cellular radio network in general
  • Figure 2 shows a cellular radio network of the invention
  • Figure 3 illustrates a method of the invention.
  • Figure 1 shows an example of the structure of a common cellular radio network.
  • the figure shows coverage areas, i.e. cells, of a base station
  • the base stations 100, 102, 130 communicate via a connecting line 112 with a base station controller 114.
  • the task of the base station controller 114 is to control the operation of its subordinate base sta- tions.
  • the base station controller 114 has a connection to a mobile services switching centre 116, and therefrom further to a public switched telephone network 118.
  • the functions of the base station 100, the base station controller 114 and even the mobile services switching centre 116 can be combined into one device, from which there is a connection to the public switched telephone network 118, for instance, to a switching centre of the public switched telephone network 118.
  • Subscriber terminals 104, 106 in a cell 200 have bidirectional radio connections 108, 110 to the base station 100 of the cell.
  • Subscriber terminals 122, 124 in a cell 220 have bidirectional radio connections 126, 128 to a base station 130 of the cell.
  • a network part i.e. a fixed part of the cellular radio network, can comprise additional base stations, base station controllers, transmission systems and network management systems of various levels. It is obvious to a person skilled in the art that the cellular radio network also comprises a variety of other structures that need not be explained in greater detail herein.
  • FIG. 2 shows a more extensive example of a cellular radio network, to which the Dynamic HotSpot algorithm of the invention can be applied in order to control the traffic load.
  • the radio network comprises a set of cells to each of which is allocated a set of frequency bands for subscriber terminal connections.
  • the cells 200, 220, 230, 240, 250 of Figure 2 use at least partly the same frequency group, i.e. the same frequencies.
  • the frequencies used are cell-specifically as follows:
  • the base stations In the cellular radio networks, the base stations generally send a so-called broadcast control channel which comprises base-station-related general information, by means of which the subscriber terminals can contact the base stations.
  • the broadcast control channel is also used when assessing the subscriber terminals' need for handover.
  • the broadcast control channel is referred to as BCCH.
  • the broadcast control channel also comprises an identifier on the basis of which the subscriber terminal knows from which base station the signal is coming.
  • the identifier data is a so-called identity code BSIC (Base Station Identity Code).
  • the subscriber terminals measure the broadcast control channel from the neighbouring cells.
  • Each subscriber terminal having a connection to its own base station measures continuously the BCCH signals of the strongest neighbouring cells to evaluate possible handover candidates.
  • the measurement information advantageously includes the received signal level and the base station identity code. Since the measuring capacity and measuring time of the subscriber terminals are finite, the number of base stations to be measured is restricted. One advantageous maximum number of base stations to be measured is six, which is used in the GSM system.
  • the subscriber terminal 122 in the cell 220 measures the strength of the BCCH signals of the six strongest received neighbouring cells and reports the measurement results to its base station 130 which forwards them to the base station controller 114.
  • the subscriber terminal 120 in the cell 200 at- tempts to establish a connection to the base station 100.
  • the decision on the acceptance of the set-up request of the subscriber terminal 120 depends on the interference the cell 200 causes to nearby cells using the same frequencies.
  • the basic idea of the invention is that the BCCH measurings executed in the neighbouring cells are utilized in estimating the effects of interference. If a call is connected to the cell 200, it may affect the quality of other calls using the same frequencies in the neighbouring cells 220, 230, 240, 250.
  • each subscriber terminal having a connection to its base station measures on a continuous basis the BCCH signals of the strongest neighbouring cells.
  • the subscriber terminals located in the cells surrounding the cell 200 also execute measurings.
  • Substantial in this context are the cells where the same frequencies are used as in the cell 200 where a decision must be made on a new connection between a subscriber terminal and the base station.
  • the method of the invention has two steps. First, interference information is collected from the neighbouring cells 220, 230, 240 and 250 of the cell 200 in the following manner. Let us start with the cell 220, for instance.
  • the base station controller collects BCCH measurement results from the subscriber terminals communicating with said cell 220.
  • Each subscriber terminal performs independent measurings preferably on six strongest BCCH signals. For the terminals located on different sides of the cell said six signals can be different. The number of common frequencies between the cell 220 and the reported neighbouring cells is calculated. Then it is examined whether the number of the common frequencies exceeds zero. If not, no considerable interference occurs between these cells. For instance, the adjacent cell 210 employs different frequencies from those of the cell 220. For this reason, the reports on the BCCH signal of this base station will be omitted in this context, even though a plurality of terminals located on that side of the cell probably measures that signal. On the basis of the BCCH measurements performed by the subscriber terminals, the neighbouring cells that have at least one common frequency with the serving cell 220 are tabulated of the strongest ones.
  • the cells using the same frequencies are thus 200, 230, 240 and 250.
  • the table of the neighbouring cells 200, 230, 240 and 250 interfered by the cell 220 is updated, the table showing, for instance, the identifiers of the neighbouring cells 200, 230, 240 and 250 using the same frequencies, the ratio of the common frequencies of the cell 220 and its neighbouring cells, i.e. the same frequencies, in relation to all available frequencies (added up from the cell 220 and each neighbouring cell at a time) in said neighbouring cells, and the poor quality samples in proportion to all samples.
  • the table for the cell 200 may appear, for instance, as follows:
  • weighting factors TS can also be calculated in the table, so that they could be utilized as interference weighting factors. The utilization will be described later on in the text.
  • the weighting factors are calculated by utilizing the information on the number of common frequencies between the interfered and interfering cells. One way to form the weighting factors is to determine the ratios of common frequencies to all available frequencies as described in the above table. Another advantageous way to form weighting factors is to calculate them with the formula
  • TRXLKM interferer the number of transceivers in the interfering cell
  • fi nterferer tne number of frequencies in the interfering cell
  • fi nte r fered tne number of frequencies in the interfered cell.
  • the interfering cell is the cell whose broadcast control channel is detected among the strongest ones, and correspondingly the interfered cell is the cell whose table is being updated.
  • Table 2 is intended for indicating the percentages of poor quality PQ% that are periodically updated.
  • the subscriber terminal reports the cell which has the common frequencies with the serving cell 220 and which is included in the group of the strongest, e.g.
  • the ratio of poor quality to overall quality is updated until said cell is no longer among the strongest (in this example, the six strongest) ones. If a plural number of the neighbouring cells 200, 230, 240, 250 reported on the list operate on the same frequencies with the six strongest ones, the poor quality percentage PQ% is updated for each neighbouring cell in the table.
  • the method of the invention measures only the poor qualities that result from the interference caused by the cells of the same frequency group. The poor quality resulting from the low signal level of the serving cell 220, for instance, can then be ignored.
  • Figure 3 shows a flow chart of an advanced Dynamic HotSpot algorithm, in which the method is used for collecting poor quality information and for calculating a frequency weighting factor for the cell 200.
  • the frequency weighting factor and the poor quality percentage PQ% are collected from each interfered neighbouring cell 220, 230, 240, 250 by using the above method.
  • What is novel and inventive is how, in particular by what method, the poor quality information of the interfered cells 220, 230, 240, 250 is collected according to the above tabulation principle and also the use of the frequency weighting factor.
  • the subscriber terminal 120 sends a service request to the cell 200. It is checked next, whether the number of traffic channels (TCH) in use exceeds a desired preset limit value. If said number does not exceed the desired limit value, the subscriber terminal 120 is connected to the cell 200 that received the service request. However, if the number of traffic channels already in use exceeds the desired limit value, the interfered neighbouring cells 220 to 250 are looked for. It is checked for each cell, whether the table of said cell 220 to 250 contains the cell 200 that received the service request. Next is determined a connection ratio for each interfered neighbouring cell 220 to 250 by means of the poor quality percentage PQ% calculated in Table 2. This ratio indicates the intensity of interfer- ence. The ratio is intended for scaling the quality value within a given range. Determination of the connection ratio on the basis of the PQ% value can be performed, for instance, by means of the following table:
  • connection ratio The values of the connection ratio are determined as follows: if the calculated, so-called excessively poor quality percentage PQ% exceeds the preset, standard poor quality limit value, the connection ratio in the table is zero. If the measured poor quality percentage PQ% is lower than or equal to the preset poor quality limit value and simultaneously exceeds the preset sig- nal quality limit value 1 , the ratio in the table is a constant 'Prob 1'. If the measured poor quality percentage PQ% is lower than or equal to the preset signal quality limit value 1 and exceeds the preset signal quality limit value 2, the ratio in the table is 'Prob 2'.
  • the ratio in the table is 'Prob 3'. If the good quality limit value exceeds the above-mentioned poor quality percentage PQ%, the ratio is 1. When necessary, it is possible to scale the table to be more detailed or less detailed, i.e. the ratio may vary with desired steps between 0 and 1.
  • each term Prob(Cell) is the connection ratio of said cell and the term TS 200/N is the frequency weighting factor between the cell 200 and a cell N.
  • the frequency weighting factor it is possible to enhance the impor- tance of each cell in proportion to the number of common frequencies.
  • the calculated value of the total probability PROB is compared with a connection threshold value formed in a predetermined manner.
  • This threshold value can be, for instance, a random number within a given range, or more preferably, a preset value (for instance 0.5). If PROB is lower than said value, the subscriber terminal 120 is connected to the cell 200 that received the service request. If PROB exceeds said value, the call is blocked and it is not connected to said cell 200.
  • the functions in accordance with the invention can preferably be implemented in the base station controller 114 or in a corresponding unit that is responsible for allocating channels to the terminals.
  • the method can be adopted by amending the programs alone, i.e. by updating the network device software such that they carry out the method steps required by the invention. Equipment changes are not necessarily needed.

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

Abstract

L'invention concerne un système cellulaire et un procédé d'attribution des canaux. L'attribution des canaux de réseau cellulaire aux abonnés dépend de l'interférence mutuelle entre la cellule donnée (200) et les cellules voisines (de 220 à 250). Dans cette invention, la définition des connexions des cellules voisines, utilisant au moins partiellement la même fréquence définie que la cellule donnée (200) et recevant l'interférence de la cellule donnée (200), est tributaire des mesures transmises par les terminaux d'abonnés dans les cellules voisines (de 220 à 250) ayant trait à leurs voisines les plus proches et tributaire des fréquences communes utilisées par les cellules voisines (220-250) accompagnées de la cellule donnée (200). Ainsi, l'attribution d'un canal à un terminal d'abonné s'effectue en fonction de données optimales.
PCT/FI1999/000945 1998-11-16 1999-11-15 Procede d'attribution des canaux et systeme cellulaire WO2000030388A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU13886/00A AU1388600A (en) 1998-11-16 1999-11-15 Channel allocation method and cellular radio system
JP2000583282A JP2002530958A (ja) 1998-11-16 1999-11-15 チャンネル割り当て方法及びセルラー無線システム
EP99972415A EP1131977A1 (fr) 1998-11-16 1999-11-15 Procede d'attribution des canaux et systeme cellulaire
NO20012385A NO20012385L (no) 1998-11-16 2001-05-15 Fremgangsmåte for kanaltildeling, samt celledelt radiosystem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI982473 1998-11-16
FI982473A FI982473A (fi) 1998-11-16 1998-11-16 Kanavanosoitusmenetelmä ja solukkoradiojärjestelmä

Publications (1)

Publication Number Publication Date
WO2000030388A1 true WO2000030388A1 (fr) 2000-05-25

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Application Number Title Priority Date Filing Date
PCT/FI1999/000945 WO2000030388A1 (fr) 1998-11-16 1999-11-15 Procede d'attribution des canaux et systeme cellulaire

Country Status (7)

Country Link
EP (1) EP1131977A1 (fr)
JP (1) JP2002530958A (fr)
CN (1) CN1326657A (fr)
AU (1) AU1388600A (fr)
FI (1) FI982473A (fr)
NO (1) NO20012385L (fr)
WO (1) WO2000030388A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1235451A1 (fr) * 2001-02-20 2002-08-28 Motorola, Inc. Optimisation des performances d'un reseau de communications cellulaire
DE10118501A1 (de) * 2001-04-12 2002-10-24 Siemens Ag Adaptive Schwellwertbestimmung zur optimierten Kanalzuteilung in Funksystemen
GB2352586B (en) * 1999-06-07 2004-03-10 Nec Corp Handover between mobile networks
JP2007506355A (ja) * 2003-09-29 2007-03-15 エルジー エレクトロニクス インコーポレイティド 無線移動通信システムのアップリンクスケジューリング方法
EP2040503A1 (fr) * 2007-09-21 2009-03-25 Research In Motion Limited Appareil et procédé pour la fourniture d'une coordination d'interférence montante dans un système de communication radio
WO2010148254A1 (fr) * 2009-06-17 2010-12-23 Qualcomm Incorporated Réutilisation de blocs de ressources pour une transmission multipoint coordonnée
EP2493238A1 (fr) * 2009-11-18 2012-08-29 Huawei Technologies Co., Ltd. Procédé et dispositif d'acquisition d'affaiblissement de propagation

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GB2391427B (en) * 2002-07-24 2005-12-21 Motorola Inc A communication system and method of allocating resource thereof
CN101237707B (zh) * 2008-03-06 2012-07-18 北京天碁科技有限公司 一种于重选或切换过程中检测同频干扰小区的方法
CN101998412B (zh) * 2009-08-11 2013-09-25 中国移动通信集团公司 分配频率资源的方法、家庭基站管理系统及毫微微基站
WO2012028919A1 (fr) * 2010-08-26 2012-03-08 パナソニック株式会社 Système de communication à plusieurs bonds
US11606732B1 (en) 2021-09-08 2023-03-14 T-Mobile Usa, Inc. Coverage improvement for 5G new radio wireless communication network, such as for over-shooting cells
US12089069B1 (en) 2021-09-08 2024-09-10 T-Mobile Usa, Inc. Coverage improvement for 5G new radio wireless communication network to automatically adjust cell properties to improve coverage and capacity
US11800382B1 (en) 2021-09-08 2023-10-24 T-Mobile Usa, Inc. Coverage improvement for 5G new radio wireless communication network

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US5455821A (en) * 1994-11-10 1995-10-03 Motorola, Inc. Communication system resource allocation method
WO1999039535A2 (fr) * 1998-02-02 1999-08-05 Nokia Networks Oy Procede de traitement d'une demande de canal de trafic

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
US5455821A (en) * 1994-11-10 1995-10-03 Motorola, Inc. Communication system resource allocation method
WO1999039535A2 (fr) * 1998-02-02 1999-08-05 Nokia Networks Oy Procede de traitement d'une demande de canal de trafic

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2352586B (en) * 1999-06-07 2004-03-10 Nec Corp Handover between mobile networks
EP1235451A1 (fr) * 2001-02-20 2002-08-28 Motorola, Inc. Optimisation des performances d'un reseau de communications cellulaire
DE10118501A1 (de) * 2001-04-12 2002-10-24 Siemens Ag Adaptive Schwellwertbestimmung zur optimierten Kanalzuteilung in Funksystemen
DE10118501C2 (de) * 2001-04-12 2003-12-18 Siemens Ag Adaptive Schwellwertbestimmung zur optimierten Kanalzuteilung in Funksystemen
JP2007506355A (ja) * 2003-09-29 2007-03-15 エルジー エレクトロニクス インコーポレイティド 無線移動通信システムのアップリンクスケジューリング方法
US8200263B2 (en) 2007-09-21 2012-06-12 Research In Motion Limited Apparatus and method for providing uplink interference coordination in a radio communication system
EP2040503A1 (fr) * 2007-09-21 2009-03-25 Research In Motion Limited Appareil et procédé pour la fourniture d'une coordination d'interférence montante dans un système de communication radio
US8694036B2 (en) 2007-09-21 2014-04-08 Blackberry Limited Apparatus and method for providing uplink interference coordination in a radio communication system
WO2010148254A1 (fr) * 2009-06-17 2010-12-23 Qualcomm Incorporated Réutilisation de blocs de ressources pour une transmission multipoint coordonnée
CN102461244A (zh) * 2009-06-17 2012-05-16 高通股份有限公司 用于多点协作传输的资源块的重新使用
US8830920B2 (en) 2009-06-17 2014-09-09 Qualcomm Incorporated Resource block reuse for coordinated multi-point transmission
EP2493238A1 (fr) * 2009-11-18 2012-08-29 Huawei Technologies Co., Ltd. Procédé et dispositif d'acquisition d'affaiblissement de propagation
EP2493238A4 (fr) * 2009-11-18 2012-10-03 Huawei Tech Co Ltd Procédé et dispositif d'acquisition d'affaiblissement de propagation

Also Published As

Publication number Publication date
JP2002530958A (ja) 2002-09-17
NO20012385D0 (no) 2001-05-15
CN1326657A (zh) 2001-12-12
FI982473A (fi) 2000-05-17
FI982473A0 (fi) 1998-11-16
EP1131977A1 (fr) 2001-09-12
AU1388600A (en) 2000-06-05
NO20012385L (no) 2001-05-15

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