EP1938643A1 - Allocating radio resources to reduce the transmission power of a terminal - Google Patents
Allocating radio resources to reduce the transmission power of a terminalInfo
- Publication number
- EP1938643A1 EP1938643A1 EP06794212A EP06794212A EP1938643A1 EP 1938643 A1 EP1938643 A1 EP 1938643A1 EP 06794212 A EP06794212 A EP 06794212A EP 06794212 A EP06794212 A EP 06794212A EP 1938643 A1 EP1938643 A1 EP 1938643A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- terminal
- radio resource
- allocation
- transmission power
- allocated
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 claims description 28
- 238000005265 energy consumption Methods 0.000 claims description 9
- 238000013468 resource allocation Methods 0.000 claims description 9
- 238000004590 computer program Methods 0.000 claims description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to a system for allocating radio resources in a mobile telecommunication network comprising a plurality of mobile terminals.
- the terminals are provided with batteries that allow them autonomy in energy over periods of time more or less long depending on the use that is made of the terminal or according to the characteristics of the battery itself. It should be noted that the power autonomy of a terminal is an important feature in the context of mobile telecommunication networks.
- a mobile terminal consumes energy for its local management such as, in particular, the management of its screen. It also consumes energy when transmitting data over radio channels of the mobile telecommunication network.
- the quantity of energy consumed by a terminal for the transmission of data can be in particular a function of the conditions in which this transmission is carried out, and more specifically of the quality of the radio channels which have been allocated to this terminal. Indeed, in general, a terminal transmitting on radio channels having low quality transmission characteristics transmits at a higher power than a terminal transmitting on radio channels having better quality transmission characteristics. It is therefore noted that the more the conditions of transmission of a mobile terminal are unfavorable, the more the terminal consumes energy and its autonomy in energy is reduced.
- the amount of energy consumed by a terminal can also be a function of the data transmission rate.
- transmission at a high rate requires a higher amount of energy than a transmission at a higher rate. lower flow rate.
- a first aspect of the present invention provides a method of allocating radio resources in a mobile telecommunication network comprising a plurality of mobile terminals; the method comprising the following steps:
- association of a transmission power and a radio resource allocated to a terminal indicates to the terminal the power level to which it must transmit on the radio resource considered.
- the available radio resources are allocated primarily to the terminals of the network that do not meet defined transmission criteria.
- transmission power is associated with each of the terminal's radio resources so as to reduce the total transmission power of the terminal. terminal, that is to say the sum of the transmit powers on all radio resources available to it.
- Those skilled in the art have a certain number of algorithms which aim at optimizing the total transmission power of a terminal as a function of the various radio resources it has at its disposal for transmitting its data. These algorithms make it possible to determine the transmission powers respectively on the allocated radio resources.
- the transmission powers thus determined are respectively associated with the allocated radio resources.
- a reiteration of the preceding steps is decided according to the radio resources still available and likely to be allocated.
- it is verified whether at least one radio resource that can be allocated satisfies an allocation condition.
- a radio resource satisfies such an allocation condition when this radio resource has interesting transmission characteristics, including a high transmission gain, for at least one of the terminals. It is easy to deduce from this example other advantageous applications relating to the allocation condition that a radio resource to be allocated satisfied.
- a radio resource satisfies an allocation condition as soon as it is available. Such a method then aims to allocate all available radio resources.
- radio resources still available can then be be allocated to certain terminals by taking into account transmission powers respectively associated with radio resources already allocated.
- the terminals which are in relatively high energy consumption conditions can then be determined. This significant energy consumption can be in particular due to difficult transmission conditions. In such a context, these terminals can then be favored by selecting them to allocate them additional radio resources and allow them to improve their transmission conditions. Thus, the power consumption of such terminals can be reduced.
- Such a sum can be calculated simply by adding the different values of these emission powers. It can also be calculated according to an equation allowing to weight these different power values. For this purpose, an equation of the type of the following equation can be used: where s is a positive value, which may for example be between 0 and 1.
- a terminal that does not satisfy defined transmission criteria is firstly selected.
- a terminal is selected according to at least one transmission power associated with a previously allocated radio resource, only if all the terminals of the network satisfy defined transmission criteria.
- a gain value associated with each available radio resource for each terminal of the network is determined, and according to which, in step IbI, the radio resource having the value the highest gain for this terminal is allocated to the selected terminal.
- a value indicating a reduction in total transmission power related to the allocation of the radio resource allocated to the preceding step IbI is determined and, if this value is less than a value determined, the law step is performed on the terminals of the network with the exception of the selected terminal.
- a method according to the present invention is applied to the terminals for which it is determined that the allocation of an additional radio resource makes it possible to reduce the total transmission power of the terminal significantly.
- the total transmission power of a terminal is estimated to be hardly reduced by the allocation of a new radio resource, this terminal is excluded from all the terminals considered step / a /.
- such a reduction in total transmission power is determined, relative to a given terminal, by subtracting from the total transmission power obtained at the previous iteration of the step Here for this terminal, the transmission power total obtained in the current step, for this same terminal.
- a terminal which furthermore satisfies the defined transmission criteria, can be selected further according to a value indicating a quantity of energy available in the terminals.
- the allocation entity has this value indicating a quantity of energy available in the battery of the mobile terminals of the network. It can allocate an additional radio resource by selecting a terminal based on, on the one hand, the transmission powers respectively determined for the radio resources allocated to it, and, on the other hand, the state of its battery. . Thus, it is possible to favor the transmission conditions of a terminal when its battery is considered low.
- the selection of a terminal is performed according to the transmission powers at step / a /, by implementing the following steps: for each terminal: calculate a sum of the transmit powers associated with the radio resources allocated to said terminal; multiply by a specified period of time and obtain a value indicative of energy consumption; and subtracting said value indicative of energy consumption from the value indicating a quantity of energy available in the terminals; select the terminal for which in the previous step the lowest result is obtained.
- the period of time on which the value indicative of power consumption is determined corresponds substantially to a period of time during which the radio resources are allocated to a terminal.
- the selection is performed as a function of transmission powers according to the following steps: calculating, for each terminal, a sum of the transmission powers on the radio resources allocated to said terminal; select the terminal for which the highest value is obtained in the previous step.
- step / a / the defined transmission criteria are fulfilled for a terminal when the allocated radio resources allow said terminal to transmit at a given transmission rate and a transmission power. total emission less than a given value.
- a second aspect of the present invention provides a base station in a mobile telecommunication network comprising a plurality of terminals.
- the base station is adapted to allocate radio resources to said terminals so as to reduce the total transmit power of a terminal among the plurality of terminals, with allocated radio resources being associated with transmit power. It comprises: terminal selection means adapted to select a terminal of the network according to at least one transmission power respectively associated with at least one radio resource previously allocated to said terminal; allocation means adapted to allocate an available radio resource to the selected terminal; association means adapted to associate a transmission power of the selected terminal with radio resources previously allocated to said terminal, so as to reduce the total transmission power of the selected terminal; control means adapted to control said selection means, said allocation means and said determination means.
- the selection means are adapted to, if at least one terminal does not meet the defined transmission criteria, select said terminal.
- the base station further comprises interface means adapted to receive from a network terminal a message comprising a value indicating a quantity of energy available in said terminal.
- a third aspect of the present invention provides a radio resource allocation device in a mobile telecommunication network comprising a plurality of terminals.
- This device is adapted to allocate radio resources to said terminals so as to reduce the total transmission power of a terminal among the plurality of terminals, a transmission power being associated with an allocated radio resource. It comprises: terminal selection means adapted to select a terminal of the network according to at least one transmission power respectively associated with at least one radio resource previously allocated to said terminal; allocation means adapted to allocate an available radio resource to the selected terminal; association means adapted to associate a transmission power of the selected terminal with radio resources previously allocated to said terminal, so as to reduce the total transmission power of the selected terminal; control means adapted to control said selection means, said allocation means and said determination means.
- a fourth aspect of the present invention provides a terminal comprising:
- means for cooperating with an allocation entity comprising:
- terminal selection means (301) adapted to select a terminal of the network as a function of at least one transmission power respectively associated with at least one radio resource allocated to said terminal;
- allocation means (302) adapted to allocate an available radio resource to the selected terminal
- associating means (303) adapted to associate transmission power of the selected terminal with radio resources previously allocated to said terminal, so as to reduce the total transmission power of the selected terminal; control means (304) adapted to control said selection means, said allocation means and said determination means.
- the terminal comprises interface means adapted to send a message to the allocation entity, said message comprising a value indicating a quantity of energy available in said terminal.
- a fifth aspect of the present invention provides a radio resource allocation system comprising a base station according to the second aspect of the present invention and a plurality of terminals according to the third aspect of the present invention.
- a sixth aspect of the present invention proposes a computer program intended to be installed in a base station, comprising instructions able to implement the method according to the first aspect of the present invention, during execution of the program by means for processing the base station.
- a seventh aspect of the present invention proposes a computer program intended to be installed in a terminal, comprising instructions able to implement the method according to the first aspect of the present invention, during execution of the program by means terminal processing.
- FIG. 1 illustrates a telecommunication network according to an embodiment of the present invention
- Figure 2 illustrates the main steps of a method according to an embodiment of the present invention
- FIG. 3 illustrates a base station and a terminal according to one embodiment of the present invention.
- the invention is described below in its application to multi-user systems with multiple transmission channels, such as OFDM systems for Orthogonal Frequency Division Multiplexing.
- the radio resources allocated in the OFDM type system are OFDM subcarriers.
- FIG. 1 illustrates a mobile telecommunication network comprising a radio or sub-carrier resource allocation entity 101, as well as a plurality of mobile terminals 102.
- the allocation entity may be a base station 101.
- Figure 2 illustrates the main steps of a method according to an embodiment of the present invention.
- the base station 101 has a set of subcarriers to allocate to the terminals 102.
- a terminal is selected from the terminals 102 of the network 103 to allocate an available subcarrier.
- This step is primarily to select a terminal that does not meet defined transmission criteria.
- Such transmission criteria may comprise a target bit rate, that is to say a bit rate expected by all the terminals of the network. They may also include a maximum power or a combination of these two criteria. Indeed, to protect users of mobile terminals or to avoid excessive interference between terminals, some standards set a maximum total transmit power value per terminal. Other transmission criteria can easily be taken into account in this selection step. It is also possible to consider different criteria depending on the type of subscription to which the user of the terminal has subscribed.
- the base station selects it. This is the case, especially when a terminal in the network has no subcarrier allocated. For example, such a terminal is selected as long as the The radio resources allocated to it do not allow it to transmit at the target rate defined in the transmission criteria and at a total transmission power lower than the maximum power value as defined in the transmission criteria.
- the selection of a terminal among these can be done randomly; or better, by choosing the terminal that has characteristics furthest from the defined criteria.
- a terminal is selected according to at least one transmission power associated with the radio resources that are already allocated to it.
- such a selection is in fact to determine which terminal is in the least advantageous transmission conditions, said conditions therefore requiring a significant energy consumption relative to the other terminals in the network. .
- it is based on the transmission powers that have been determined for the radio resources available to the terminal.
- a terminal is selected.
- an available radio resource is allocated to the selected terminal.
- one of these radio resources is selected so as to favor the conditions of transmission of the terminal. It may then be advantageous to select a radio resource based on a gain value corresponding to the radio resource and the selected terminal.
- the base station determines a gain value for each radio resource associated with each terminal of the network.
- the base station temporarily allocates, and more precisely for a short time, all the radio resources available to each of the terminals of the network. During this period of time, the base station determines the gain values of all radio resources relative to all terminals.
- the skilled person knows methods for determining these gain values. Therefore, these methods of estimating channel transmission characteristics will not be detailed in the following sections.
- the base station is then able to select the radio resource that has the largest gain for the selected terminal, and allocate this radio resource.
- step 23 a new transmission power distribution configuration is determined on the subcarriers then available to the selected terminal.
- the invention covers all methods allowing a powerful distribution of the transmission powers on the radio resources allocated to this terminal, such as in particular water-filling algorithms as referenced above.
- R k the rate required by the terminal k (i.e., the target rate);
- v k , n the ratio of the thermal noise power spectral density, denoted No, to the gain of the channel corresponding to the terminal k and the subcarrier n, denoted Hk, n .
- S k the set of sub-carriers n allocated to the terminal k; ⁇ , ⁇ and p constants;
- P k , n the transmission power on the subcarrier n allocated to the terminal k; w a reference power value; - R a flow.
- the transmission power is determined on each subcarrier n of the set S k according to the following equation:
- the total transmit power reduction achieved by allocating the additional subcarrier is determined. If this reduction is considered to be low, the total transmit power of this terminal is considered to be unlikely to be significantly reduced by the allocation of additional subcarriers. The reduction of the total transmit power, less than p, from which the terminal k has benefited after the allocation of a new subcarrier is considered as not justifying that this terminal may again benefit from an additional subcarrier allocation. . As a result, this terminal k is excluded from all the terminals considered in step 21. The set of terminals considered in step 21 is noted T thereafter.
- step 24 if a radio resource is still available (arrow o at the output of test 24), then the steps of this method are repeated.
- the base station waits for an already allocated radio resource to be freed in order to be able to apply a method of allocating this radio resource according to an embodiment of the present invention.
- the process steps 21 to 24 are performed again.
- the selection of a terminal according to the transmission powers can be performed according to different variants.
- step 21 the selection as a function of at least one transmission power is performed by considering, for each terminal belonging to the set T of the terminals, the sum of the transmission powers. associated with all the subcarriers respectively allocated to a terminal.
- T includes terminals for which the allocation of an additional subcarrier is considered to be unable to reduce power consumption.
- the base station can calculate for each terminal k of the network, where appropriate for each terminal k of the set T previously defined, a value A k according to the following equation:
- the terminal k for which a maximum value A k is obtained, is selected.
- the selection of a terminal as a function of at least one transmission power can be carried out taking into account, in addition, the state of the terminal battery.
- the base station receives from the terminals information relating to the state of the battery. This information indicates a quantity of available energy in the battery of each terminal. It can be sent periodically from the terminals to the base station. Such information does not require frequent updating.
- a message containing the information relating to the state of the battery can advantageously be sent with a period of time of the order of a few minutes. In one embodiment of the present invention, this information is included in a control frame or in a connection request frame. It is also possible to provide for transmitting such information to the base station via an SMS message (for 'Short Message Service'). The invention covers all methods of transmitting such information.
- the considered system comprises an integer K of terminals k.
- the transmission criteria of a terminal referenced k correspond to a transmission rate of R k as well as to a total transmission power of maximum value denoted P ma ⁇ .
- the number of subcarriers in the network is denoted by N and the total bandwidth of the network is denoted B.
- Each subcarrier allocated to a terminal corresponds to a different radio channel whose gain is denoted H k, n.
- information indicating quantity of energy available in the battery of a terminal k is denoted E k -
- the terminal which, after transmitting data for a certain period of time on the radio resources allocated to it, would be the one with the lowest amount of energy in its battery.
- the base station having for each terminal, information relating to the state of the battery and transmission power on each sub-carrier allocated, is able to estimate the state of the battery of each terminal after he transmitted for a period of time noted ⁇ t.
- the time period ⁇ t, on which such power consumption is determined is advantageously a function of the average time interval during which a radio resource allocation remains valid in the network.
- the channel changes that have occurred are estimated. If the estimated channel changes have been very large during the last period of time considered, then the time period ⁇ t on which energy consumption is calculated can be advantageously reduced. On the other hand, if the channel changes have been small, the same period of time can be conserved, and if the channel changes have been extremely small, it is even possible to predict to increase the time period ⁇ t.
- the base station in order to select the terminal to which an additional subcarrier will be allocated, the base station takes into account the state of the battery of the terminals of the network as well as the energy that will to be consumed, during the time period ⁇ t to come, for the transmission of data on sub-carriers already allocated.
- the base station makes an estimate of the amount of energy that will be available in the battery after the transmission of data on subcarriers already allocated during this period of time.
- the base station determines an estimate E ' k of the state of the battery of each terminal of the network according to the following equation:
- E ⁇ Ek-At ⁇ P ,,, ⁇ eS t
- S k is the set of subcarriers allocated to the terminal k. Then, the base station selects the terminal for which the result obtained E ' k is the lowest.
- a third variant can be based both on the first variant and on the second variant, in particular in the case where certain terminals of the network do not have the capacity to send to the base station information relating to the state of their battery.
- the terminals of the network which fulfill the defined transmission criteria and which are selected to be allocated an additional subcarrier are those which have subscribed a subscription from the operator managing the network in which they are located. Thus, only terminals that have subscribed to a specific subscription can benefit from additional subcarrier enabling them to reduce their energy consumption and thereby increase their energy autonomy.
- Figure 3 illustrates a base station 101 in a mobile telecommunication network comprising a plurality of terminals adapted to allocate radio resources to said terminals.
- the base station comprises: terminal selection means 301 adapted to select, if a terminal of the network does not meet the defined transmission criteria, said terminal; and if not for selecting a terminal of the network according to transmission powers respectively determined for radio resources allocated to said terminal; allocation means 302 adapted to allocate an available radio resource to the selected terminal; determining means 303 adapted to determine a transmission power of the selected terminal on each radio resource allocated to said terminal, so as to reduce the total transmit power of the selected terminal; control means 304 adapted to control said selection means, said allocation means and said determination means and implement a method according to an embodiment of the present invention.
- the base station may further comprise interface means 305 adapted to receive from a network terminal a message comprising a value indicating a quantity of energy available in said terminal.
- Fig. 3 also illustrates a terminal in an embodiment of the present invention. This terminal is adapted to cooperate with the base station 101.
- the terminal further comprises interface means 307 adapted to send a message to the base station 101, this message comprising a value indicating a quantity of energy available in the mobile terminal.
- An embodiment of the present invention advantageously allows a greater autonomy of the terminals in a mobile telecommunication network. Consequently, such a method can make it possible to increase the communication time of the users in such a network.
- An embodiment of the present invention is easy to implement.
- a system according to one embodiment of the present invention is particularly suitable for terminals having a relatively low mobility, such as, for example, terminals used by pedestrians.
- channel variation is meant a change in the allocation of radio resources to the terminals. These variations may be due to the fact that the terminals moving out of the network and others moving also enter. This mobility leads to changes in the allocation of radio resources and thus variations of channels more or less fast depending on the mobility of the terminals.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephonic Communication Services (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0508158 | 2005-07-29 | ||
PCT/FR2006/001813 WO2007012751A1 (en) | 2005-07-29 | 2006-07-25 | Allocating radio resources to reduce the transmission power of a terminal |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1938643A1 true EP1938643A1 (en) | 2008-07-02 |
Family
ID=36089866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06794212A Withdrawn EP1938643A1 (en) | 2005-07-29 | 2006-07-25 | Allocating radio resources to reduce the transmission power of a terminal |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090232036A1 (en) |
EP (1) | EP1938643A1 (en) |
JP (1) | JP4990279B2 (en) |
KR (1) | KR20080035640A (en) |
CN (1) | CN101233777A (en) |
WO (1) | WO2007012751A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2334000A1 (en) | 2004-10-13 | 2011-06-15 | McMASTER UNIVERSITY | Operating environment analysis techniques for wireless communication systems |
US8027290B2 (en) * | 2007-06-15 | 2011-09-27 | Alcatel Lucent | Methods of jointly assigning resources in a multi-carrier, multi-hop wireless communication system |
US8131302B2 (en) * | 2007-07-20 | 2012-03-06 | Broadcom Corporation | Method and system for dynamically splitting jobs across multiple agnostic processors in wireless system |
US8139543B2 (en) * | 2008-10-14 | 2012-03-20 | Symbol Technologies, Inc. | Coverage-hole detection and self healing |
KR101020141B1 (en) * | 2008-11-13 | 2011-03-07 | 경희대학교 산학협력단 | resource assignment method for wireless communication system |
JP5580346B2 (en) * | 2010-02-10 | 2014-08-27 | パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ | Wireless communication terminal device, wireless communication base station device, and wireless communication method |
US8868001B2 (en) * | 2010-05-04 | 2014-10-21 | Electronics And Telecommunications Research Institute | Scheme for monitoring battery of machine type communication device |
CN103299697A (en) | 2010-10-29 | 2013-09-11 | 瑞典爱立信有限公司 | Method and arrangement in a communications network |
US20180077717A1 (en) * | 2016-09-09 | 2018-03-15 | Futurewei Technologies, Inc. | Cellular scheduler apparatus, computer program, and method for selecting user equipment based on beam or delay state information |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5974327A (en) * | 1997-10-21 | 1999-10-26 | At&T Corp. | Adaptive frequency channel assignment based on battery power level in wireless access protocols |
US7072315B1 (en) * | 2000-10-10 | 2006-07-04 | Adaptix, Inc. | Medium access control for orthogonal frequency-division multiple-access (OFDMA) cellular networks |
US7096034B2 (en) * | 2001-10-01 | 2006-08-22 | Microsoft Corporation | System and method for reducing power consumption for wireless communications by mobile devices |
US7027843B2 (en) | 2002-03-21 | 2006-04-11 | Lenovo (Singapore) Pte. Ltd. | Wireless device power optimization |
US8422434B2 (en) * | 2003-02-18 | 2013-04-16 | Qualcomm Incorporated | Peak-to-average power ratio management for multi-carrier modulation in wireless communication systems |
US8228952B2 (en) * | 2003-08-22 | 2012-07-24 | Imec | Method for operating a telecom system |
JP2007503780A (en) * | 2003-08-27 | 2007-02-22 | インターディジタル テクノロジー コーポレイション | Subcarrier and bit allocation for real-time services in multi-user orthogonal frequency division multiplexing (OFDM) systems |
KR100891050B1 (en) * | 2003-10-16 | 2009-03-31 | 닛본 덴끼 가부시끼가이샤 | Capacity scheduling method and system |
EP1530387A1 (en) * | 2003-11-06 | 2005-05-11 | Matsushita Electric Industrial Co., Ltd. | Transmission power range setting during channel assignment for interference balancing in a cellular wireless communication system |
KR100557158B1 (en) * | 2003-11-12 | 2006-03-03 | 삼성전자주식회사 | Apparatus for sub-carrier allocation in mimo ofdm mobile communication system and method thereof |
US7307953B2 (en) * | 2004-03-17 | 2007-12-11 | Interdigital Technology Corporation | Scheduling for non-real-time services in orthogonal frequency division multiplex (OFDM) systems |
-
2006
- 2006-07-25 WO PCT/FR2006/001813 patent/WO2007012751A1/en active Application Filing
- 2006-07-25 JP JP2008523412A patent/JP4990279B2/en not_active Expired - Fee Related
- 2006-07-25 CN CNA2006800279511A patent/CN101233777A/en active Pending
- 2006-07-25 KR KR1020087003899A patent/KR20080035640A/en not_active Application Discontinuation
- 2006-07-25 EP EP06794212A patent/EP1938643A1/en not_active Withdrawn
- 2006-07-25 US US11/989,594 patent/US20090232036A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2007012751A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR20080035640A (en) | 2008-04-23 |
JP4990279B2 (en) | 2012-08-01 |
US20090232036A1 (en) | 2009-09-17 |
WO2007012751A1 (en) | 2007-02-01 |
JP2009503973A (en) | 2009-01-29 |
CN101233777A (en) | 2008-07-30 |
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