WO2012071727A1 - Procédé et nœud local pour attribution de puissance coordonnée - Google Patents

Procédé et nœud local pour attribution de puissance coordonnée Download PDF

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Publication number
WO2012071727A1
WO2012071727A1 PCT/CN2010/079354 CN2010079354W WO2012071727A1 WO 2012071727 A1 WO2012071727 A1 WO 2012071727A1 CN 2010079354 W CN2010079354 W CN 2010079354W WO 2012071727 A1 WO2012071727 A1 WO 2012071727A1
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Prior art keywords
power
cell
transmit power
resource block
value
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PCT/CN2010/079354
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English (en)
Inventor
Zhenning Shi
Yajuan Luo
Lin Huang
Daqing Gu
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France Telecom Research & Development Beijing Company Limited
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Priority to PCT/CN2010/079354 priority Critical patent/WO2012071727A1/fr
Priority to PCT/IB2011/003190 priority patent/WO2012073118A1/fr
Publication of WO2012071727A1 publication Critical patent/WO2012071727A1/fr

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    • 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
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • 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
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/247—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where the output power of a terminal is based on a path parameter sent by another terminal
    • 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
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/267—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate

Definitions

  • the invention relates to the field of power allocation in wireless communication systems, and more specifically in multicarrier based communication networks.
  • Wireless communication networks usually define a plurality of cells each covered by a local node, also called base station, which transmits and receives radio frequency signals to user equipments located within the cell.
  • a local node also called base station
  • intercell interference When user equipments located in different neighbouring cells use the same frequencies for transmission, a detrimental effect called intercell interference can occur and affect the signal to noise ratio of their transmission.
  • Figure 1 shows a wireless communication network affected by such an intercell interference effect.
  • a "serving link” connect the local nodes with the user equipments.
  • these user equipments may also receive "interference link” signals emitted from local nodes of neighbouring cells, which causes intercell interference. In figure 1, this is the case for user equipments UE2 and UE3 which receive interference link signals from local node eNBl, such signals being detrimental to their own transmission.
  • SFFR Soft Fractional Frequency Reuse
  • This scheme consists in dividing, within one cell, the available spectrum into resource block subsets and to allow the users located substantially at the center of the cell to access to all resource blocks while the users located at the cell edges (thus close to the users located in neighbouring cells) are only provided access to a portion of the whole spectrum.
  • the subchannels occupied by cell edge users are orthogonal between cells.
  • TMU-based channel allocation aims at maximizing the system throughput improvement by channel assignment. This is enabled by evaluating the achievable throughput with the user of interest as well as the throughput without this user, and choosing the user that maximizes the system throughput.
  • this scheme employs orthogonal frequency assignment, the spectrum accessible by the users is limited. Furthermore, the frequency reuse patterns employed in SFFR is static or semi-static (according to LTE-Rel 8) and thus not adaptive to a time- varying radio environment.
  • the split of the spectrum into two subsets for the use around the cell center and at the cell edges, and the power ratio between the corresponding two user groups are performed empirically in the existing techniques. This is suboptimal and less efficient for a variety of scenarios.
  • US Patent Application No. US2010/009710 “Distributed Inter- cell interference Mitigation in OFDMA Multi-Carrier Wireless Data Networks," H. Zhang et al., discloses a coordinated downlink power allocation scheme for an OFDMA based network.
  • the power update at local cells is performed to maximize the modified weighted data rate summed over the local cells as well as their in-neighbor sets, which are defined as being the set of cells that are subject to the interference from the considered cells.
  • a method for coordinated power allocation within a first cell associated with a first local node comprising, for at least one resource block used in the first cell, the steps of receiving, at the first local node, at least one power coordinating value depending on an average user data throughput value determined for the resource block in a neighbouring cell of said first cell and assigning a transmit power to said one resource block in accordance with the received power coordinating value.
  • the power coordinating value further depends on a power coordination parameter such that the power coordinating value is proportional to the average data throughput value raised to the power of the opposite of the power coordination parameter, in order to choose an appropriate trade-off between the gain increase for cell edge users and the performance of average user throughput.
  • the power coordinating value is defined as follows:
  • Rj is the average data throughput value determined for the resource block
  • ⁇ is the power coordination parameter
  • ⁇ ⁇ is the channel gain H ⁇ between the first cell CO and the scheduled user on the j-th resource block B j in the neighbouring cell Ci
  • Nj° is the noise-plus-interference factor Nj° on the j-th resource block B j in the neighbouring cell Ci.
  • the value of the power coordination parameter is comprised between 1 and 3, which offers a good trade-off between the gain increase for cell edge users and the performance of average user throughput.
  • an a-PF scheduling scheme with a scheduling parameter is used in the first cell. The use of such an a-PF scheduling scheme allows enhancing further the coordinated power allocation by choosing an appropriate scheduling parameter a.
  • the value of the scheduling parameter is comprised between 0,75 and 2, in order to obtain a good trade-off between fairness among scheduled cell edge users and efficiency in terms of average data throughput.
  • the step of assigning the transmit power to the resource block comprises:
  • system-defined parameter is adjusted by replacing system-defined parameter ⁇ with the value ⁇ ⁇ sgn(P T0T - P MAX ) + ⁇ , wherein ⁇ is a predefined variation value, PMAX is the maximum transmit power assignable by the first local node and ⁇ is the total assigned transmit power for all resource blocks in the first cell CO.
  • the calculation of the transmit power for the resource block, the computation of the total transmit power and the adjustment of the system-defined parameter are performed iteratively until the condition on the computed total transmit power is verified.
  • the calculation of the transmit power for the resource block, the computation of the total transmit power and the adjustment of the system-defined parameter are performed iteratively until the condition on the computed total transmit power is verified.
  • the condition on the computed total transmit power is verified if the computed total transmit power is less than the maximum transmit power of the first local node.
  • condition on the computed total transmit power is verified if the difference between the maximum transmit power of the first local node and the computed total transmit power is less than a predetermined threshold value.
  • a computer program product comprising instruction codes for implementing the steps of a method for coordinated power allocation as discussed before, when loaded and run on processing means of a local node in a wireless communication network.
  • a local node comprising transmission means for transmitting a signal to at least one user equipment scheduled with a resource block in a first cell and processing means for assigning transmit power to said resource block, characterised in that the transmissions means and the processing means are adapted to perform the steps of the method for coordinated power allocation as discussed before.
  • a wireless communication network comprising at least first and second local nodes as discussed before, these first and second local nodes being configured to perform the steps of the method for coordinated power allocation as discussed before.
  • FIG. 1 shows a wireless communication network comprising a plurality of cells covered by local nodes
  • FIG. 2 illustrates a flow chart of the steps of the method for coordinated power allocation according to the present invention
  • FIG. 3 illustrates a flow chart of the substeps of the power allocation step employed in the coordinated power allocation according to the present invention
  • FIG. 4 illustrates a wireless communication network comprising at least one local node adapted to perform the steps of the coordinated power allocation according to the present invention
  • FIG. 5 A, 5B, 5C and 5D show simulated distribution curves for different types of parameters, in order to show the advantage of using the method according to the present invention.
  • Figure 2 illustrates a flow chart of the steps of the method for coordinated power allocation according to the present invention.
  • such a method is performed here within a first cell CO covered by a first local node eNBO, but may be performed in parallel in any number of cells Ci covered by their respective local nodes eNBi.
  • a set of J of resource blocks ⁇ B j ⁇ i ⁇ j ⁇ j are used by the local node eNBO to communicate with user equipments within the first cell CO.
  • resource blocks B j represent more particularly blocks of frequencies in an OFDMA Network.
  • the method for coordinated power allocation comprises the reception (step 100), by the first local node eNBO, of at least one power coordinating value ⁇ j (l ⁇ 0) depending at least on an average data throughput value R determined for the j-th resource block B j in one of the neighbouring cells Ci of said first cell CO.
  • the first local node eNBO assigns (assignment step 200) a transmit power P. 0> to the j-th resource block B j in accordance with the received power coordinating value ⁇ ⁇ 0) .
  • a single power coordinating value ⁇ j (l ⁇ 0) from a single neighbouring cell Ci is received here.
  • several power coordinating value ⁇ ) ( ⁇ 0) can also be received from different neighbouring cells Cl,...Ci,...,CN during the receiving step 200.
  • This first power coordinating value ⁇ j (l ⁇ 0) can be obtained via a user-channel pairing using a standard scheduling method, for instance a round robin method or an a-PF scheduler method.
  • this first power coordinating value ⁇ ( ⁇ 0) can be estimated statistically and sent to neighbouring cells on a super-frame basis to reduce signalling overhead. It is also noted that reception of coordinating value ⁇ ( ⁇ 0) from different neighbouring cells Ci can be asynchronous.
  • the transmit power of the signals transmitted from the first local node eNBO to the user equipments within the first cell CO in the j-th resource block B j is thus calculated in accordance with the average data throughput determined within the neighbouring cells Cl,..,Ci and can thus be adjusted to minimize the impact of intercell interferences in the long term with the users of this neighbouring cell while maximizing the long term throughput of users in cell CO.
  • the above-mentioned receiving and assigning steps can be performed in parallel for one, several or all of the J resource blocks B j of the set of resource blocks ⁇ B j ⁇ i ⁇ j ⁇ j that are involved in the multi-cell coordination.
  • the first local node eNBO can then apply the specifically assigned transmit power value P. 0> for transmitting (transmission step 300) signals to the user equipments with the corresponding resource blocks B j .
  • the first local node eNBO can update its own channel statistic and user SINR, compute new power coordinating values ⁇ ) (0 ⁇ 1) ,..., ⁇ ) (0 ⁇ ) based on these updated channel statistics and transmit these new power coordinating values respectively to local nodes eNB l,...eNBi, in order for them to update in turn their own transmit power values (power coordinating value updating step 400).
  • the frequency to update and distribute coordination values is not necessarily the same as the power scheduling cycle in those cells.
  • the above-mentioned power coordinating value ⁇ ) ( ⁇ 0 depends also on a power coordination parameter ⁇ such that the power coordinating value ⁇ ) ( ⁇ 0) is proportional to the average data throughput value R raised to the power of the opposite of the power coordination parameter ⁇ , that is to say : ⁇ ( ⁇ 0> ⁇ x J
  • Such a power coordination parameter ⁇ is a strictly positive value and modulates therefore the influence of average data throughput value on the power coordinated allocation scheme, in order to give more flexibility to the network operator to choose an appropriate trade-off according to the network context.
  • Such a power coordination parameter ⁇ is commonly allocated to all the cells involved with this coordinated power allocation scheme in the network, that is to say to at least all the neighbouring cells Ci of the first cell CO or even all the cells of the network, and is advantageously adjustable and distributed by a central controller in a semi-static manner to the different cells involved.
  • the above-mentioned power coordinating value ⁇ j (l ⁇ 0) may also depend on an average interference value N : (l) determined for the j-th resource block B j in one of the neighbouring cells Ci of said first cell CO and a channel gain value H f determined between the said first cell CO and the user in one of neighbouring cells Ci.
  • N an average interference value N : (l) determined for the j-th resource block B j in one of the neighbouring cells Ci of said first cell CO and a channel gain value H f determined between the said first cell CO and the user in one of neighbouring cells Ci.
  • the coordinated power mitigation scheme of the present invention can be used jointly with a scheduling scheme wherein cell edge users get more scheduling opportunities.
  • Generic scheduling schemes are usually employed in communication systems, such as round robin (RR) scheduling schemes, max C/I scheduling schemes or proportional fair (PF) scheduling schemes.
  • RR round robin
  • PF proportional fair
  • the RR scheduler randomly picks users from a user set with non-empty queues for transmission. It guarantees fairness among all active users. Nevertheless, it is inefficient in realizing user throughputs.
  • the Max C/I scheduling always schedules the users in best channel conditions. It therefore maximizes the instantaneous sum throughput of the cell. However, users close to cell site that usually maintains a bore-sight link with serving base station are most likely to be scheduled while cell edge users starve.
  • the ⁇ -PF scheduling (wherein ⁇ >1), on the other hand, maximizes the logarithm of the average throughput of users by scheduling users in their own best channel conditions. That is to say, a user whose channel condition is close to its own peak channel quality is scheduled. It balances between throughput maximization and user fairness and proves its success in high data-rate cellular networks such as UMTS.
  • Generic alpha-PF schedulers are thus more advantageous in the present case than other types of schedulers in that it allows increasing alpha tradeoffs cell throughput for more fairness among users. Since the PF metric of neighboring cell users is considered, a cluster utility-maximizing power allocation scheme can automatically avoid generating excessive intercell interference to provide fairness to users in neighboring cells. Hence, fairness can be used in the present invention as an intercell interference coordination (ICIC) mechanism which goes beyond the conventional scope in scheduling.
  • ICIC intercell interference coordination
  • An exemplary a-PF scheduling scheme with a scheduling parameter a is discussed for instance in "Packet Scheduling Algorithms with Fairness Control for CDMA Reverse Link", from J. Shin et al., wherein the scheduling parameter a > 1.
  • an a-PF scheduling scheme with a scheduling parameter a is advantageously used in the first cell CO, in addition to the power coordinated allocation method of the present invention.
  • the first power coordinating value ⁇ ( ⁇ 0) may be obtained according to the following calculation:
  • the power optimization value P (0) for the first cell CO can be formulated as follows:
  • - j is the index for the j-th resource block B j considered
  • - J is the total number of resource blocks
  • R is the user average throughput and a is the scheduling parameter of the aPF generalized utility function.
  • a further condition applying here is that the sum of the individual transmit power values P 0) , for each of the J resource blocks, remains lower or equal than the maximum transmit power P MAX of the local node eNBO, that is to say that the following equation is verified:
  • the individual transmit power value P 0) assigned to the j-th resource block B j can then be determined as follows: (5) 3(0) wherein:
  • N - N (0) and N (i) are the noise-plus-interference factors on the j-th resource block B j respectively in cell CO and in its neighbouring cell Ci;
  • - SINRf ⁇ is the signal-to-noise ratio for the scheduled user on the j-th resource block B j in the neighbouring cell Ci;
  • - ⁇ is a power coordination parameter, commonly allocated to the first cell CO and all the neighbouring cells Ci, as discussed previously,
  • a power coordination value forwarded by neighbouring cell Ci to cell CO of interest is then given as follows: 0 ⁇
  • the power coordinating value ⁇ ( ⁇ 0) can be computed as follows :
  • Such a power coordination value ⁇ (, ⁇ 0) can be transmitted from the local node eNBi of neighbouring cell Ci to the local node eNBO of the first cell CO, where it can be used to calculate the transmit power P j (0) to be assigned to the j-th resource block B j in the first cell CO.
  • Figure 3 illustrates a flow chart for further describing an embodiment of the power assignment step 200 performed in the coordinated power allocation according to the present invention.
  • the power assignment step 200 comprises the substep of computing (calculation step 201) at least one individual transmit power value P j (0) for a j-th resource block B j in accordance with the received first power coordinating value ⁇ ( ⁇ 0) and a system-defined parameter ⁇ .
  • the individual power value P (0) can be computed, for instance, as follows : wherein:
  • R j (0) is the average throughput for a scheduled user on the j-th resource block B j in the first cell
  • - ⁇ is a power coordination parameter commonly allocated to the first cell CO and all the neighbouring cells Ci,
  • N ⁇ 0 is the noise-plus-interference on the j-th resource block B j in the first cell CO.
  • the power assignment step 200 comprises the computation (step 203) of the total transmit power ⁇ assigned to all the resource blocks in the first cell CO.
  • a condition on the computed total transmit power ⁇ is verified during a verification step 205, in order to determine if the computed individual transmit power value P j (0) can be assigned or not to the resource block B j .
  • the total power value ⁇ is computed for instance by summing the individual power values P j (0) assigned to all of the J resource blocks j within the first cell CO, according to the following equation :
  • system-defined parameter ⁇ is adjusted by replacing ⁇ with the value ⁇ ⁇ sgn(P TOT - P MAX ) + ⁇ , wherein:
  • - sgn(x) is the function outputting the sign of x.
  • - PMAX is the maximum transmit power of the first local node eNBO, that is to say the maximum transmit power than can assigned to resource blocks by this first local node eNBO,
  • the assignment of the individual transmit power P 0) to the j-th resource block Bj is thus advantageously conditional to the total transmit power ⁇ ⁇ ⁇ of the local node in order to take into account the limits imposed on said local node.
  • the condition on the computed total transmit power ⁇ is verified if the value of the computed total transmit power ⁇ is less than the value of the maximum transmit power PMAX of the first local node, as follows:
  • a further condition can be taken into account in addition to the above-mentioned condition defined by equation (10).
  • Such a further condition is that the difference between the maximum total power value PMAX and the total power value ⁇ is below a predetermined threshold value ⁇ , as follows:
  • the assignment step 207 is performed. If one of these two condition is not fulfilled, the system-defined parameter ⁇ is adjusted in accordance with the computed total transmit power ⁇ .
  • Figure 4 illustrates a wireless communication network comprising at least one local node adapted to perform the steps of the coordinated power allocation according to the present invention.
  • a wireless communication network comprising a first cell CO, a second cell CI and a third cell Ci, covered respectively by local nodes eNB0,eNBl and eNBi, is described.
  • the different local nodes transmit power coordinating values to each other, that is to say:
  • first local node eNBO transmit power coordinating values ⁇ 0 ⁇ 1) and ⁇ (0 ⁇ ) respectively to local node eNBl and eNBi;
  • second local node eNBl transmit power coordinating values ⁇ (1 ⁇ 0) and ⁇ 1 ⁇ ) respectively to local node eNBO and eNBi;
  • third local node eNBi transmit power coordinating values ⁇ ( ⁇ 0) and ⁇ 1 ⁇ 1) respectively to local node eNBO and eNBl;
  • the first local node eNBO is arranged to perform steps 100' to 400' which are similar to steps 100 to 400 of the previously discussed coordinated power allocation method.
  • the first local node eNBO receives power coordinating values ⁇ 1 ⁇ 0) and ⁇ ( ⁇ 0) from local nodes eNBl and eNBi during a receiving step 100' similar to previously discussed receiving step 100.
  • the first local node eNBO can assign a transmit power value P 0) to the j-th resource block B j during an assignment step 200' similar to the assignment step 200 described previously, for instance by using equation (8) with these new power coordinating values ⁇ 1 ⁇ 0) and ⁇ 1 ⁇ 0) .
  • This assigned transmit power value P 0) can then be used for transmitting signals to the scheduled user in the j-th resource block B j during a transmission step 300' similar to the transmission step 300.
  • the first local node eNBO can subsequently update its own channel and user SINR statistics, compute updated power coordinating values ⁇ (0 ⁇ 1) and ⁇ (0 ⁇ ) in accordance with equation (7) and transmit these updated power coordinating values ⁇ (0 ⁇ 1) and ⁇ (0 ⁇ ) respectively to local nodes eNBl and eNBi, so that they can in turn update their own transmit power values in accordance with the present invention.
  • Figures 5A-5D shows simulated distribution results for different types of parameters, in order to show the advantage of the present invention.
  • Table 1 Simulation assumptions Figure 5A shows the user SINR distribution curve achieved with the method of the present invention, when the power coordination parameter ⁇ is chosen to be 1 and compared to a SINR distribution curve obtained with a usual equal power assignment scheme.
  • Figure 5B shows the user throughput distribution curve achieved with the method of the present invention, when the power coordination parameter ⁇ is chosen to be 1 and compared to a user throughput distribution curve obtained with a usual equal power assignment scheme.
  • Figure 5C shows the user throughput distribution curve achieved with the method of the present invention for different power coordination parameters ⁇ .
  • Table 2 below reports the average user throughput and the five-percentile user throughput for various power coordination parameter ⁇ values, compared to those for a non-cooperative equal-power allocation scheme. Power Average user Increase on Cell edge Increase on cell coordination throughput Average user throughput edge throughput parameter ⁇ throughput
  • Figure 5D shows the average user throughput versus increase on the cell edge throughput (five percentile user throughput) in an embodiment of the invention wherein both the coordinated power allocation method of the present invention and an a-PF scheduling scheme are used in the first cell CO, for different values of the scheduling parameter a and the power coordination parameter ⁇ is used in the coordinated power allocation scheme.
  • the embodiment is put forward for a single-input single-output (SISO) channel
  • the proposed invention can be applied to multiple-input multiple-output (MIMO) systems as well.
  • MIMO multiple-input multiple-output
  • the transmitted power for the eigenmodes of the spatial channel matrix on a number of resource blocks is optimized to maximize the long term user throughputs in a number of co-channel cells, following the above-mentioned strategy.
  • the example is presented with a generic network structure where a number of overlapping cells reuses the resources in frequency, time and spatial domains.
  • the network can be either a classic cellular network, a heterogeneous network comprising underlaid macrocells and overlaid low-power small access points, e.g., home eNodeB (HeNB) or indoor relays, or cognitive radio network.
  • HeNB home eNodeB
  • indoor relays e.g., cognitive radio network.
  • the invention also relates to a computer program product that is able to implement any of the method steps as described above when loaded and run on the processing means of a local node of a wireless communication network as described previously.
  • the computer program may be stored or distributed on a suitable medium supplied together with or as a part of other hardware, but may also be distributed in other forms, such as via the Internet or other wired or wireless telecommunication systems.

Abstract

La présente invention porte sur un procédé d'attribution de puissance coordonnée dans une première cellule (C0) associée à un premier nœud local (eNB0), le procédé consistant, pour chaque bloc de ressources parmi au moins un bloc de ressources (Bj) utilisé dans la première cellule, à recevoir (100), au niveau du premier nœud local, au moins une valeur de coordination de puissance (îj (i→0)) dépendant d'une valeur de débit de données moyen (Rj(i)) déterminée pour le bloc de ressources (j) dans une cellule voisine (Ci) de ladite première cellule et à attribuer (200) une puissance d'émission (Pj(0)) audit bloc de ressources (Bj), conformément à la valeur de coordination de puissance (ξj (i→0) reçue. La présente invention porte également sur un programme d'ordinateur correspondant, un nœud local configuré pour exécuter les étapes de ce procédé, ainsi qu'un réseau comprenant un tel nœud local.
PCT/CN2010/079354 2010-12-01 2010-12-01 Procédé et nœud local pour attribution de puissance coordonnée WO2012071727A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2863688A1 (fr) * 2013-10-17 2015-04-22 Alcatel Lucent Concept de commande de puissance pour un système de communication cellulaire

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009140311A2 (fr) * 2008-05-13 2009-11-19 Qualcomm Incorporated Sélection de puissance de transmission pour équipement utilisateur communiquant avec des femtocellules
WO2010076773A2 (fr) * 2008-12-29 2010-07-08 France Telecom Procédé et système d'allocation de ressources
CN101779500A (zh) * 2007-08-10 2010-07-14 高通股份有限公司 针对相邻节点的发射功率自适应

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8335534B2 (en) 2008-07-10 2012-12-18 Nec Laboratories America, Inc. Distributed inter-cell interference mitigation in OFDMA multi-carrier wireless data networks
US20120044849A1 (en) * 2009-02-02 2012-02-23 Ciena Corporation Power allocation in closed-loop downlink cooperative multiple point (comp) transmission

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101779500A (zh) * 2007-08-10 2010-07-14 高通股份有限公司 针对相邻节点的发射功率自适应
WO2009140311A2 (fr) * 2008-05-13 2009-11-19 Qualcomm Incorporated Sélection de puissance de transmission pour équipement utilisateur communiquant avec des femtocellules
WO2010076773A2 (fr) * 2008-12-29 2010-07-08 France Telecom Procédé et système d'allocation de ressources

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2863688A1 (fr) * 2013-10-17 2015-04-22 Alcatel Lucent Concept de commande de puissance pour un système de communication cellulaire

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