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WO2003039024A2 - Regulation de puissance de liaison descendante - Google Patents

Regulation de puissance de liaison descendante Download PDF

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Publication number
WO2003039024A2
WO2003039024A2 PCT/EP2001/012609 EP0112609W WO03039024A2 WO 2003039024 A2 WO2003039024 A2 WO 2003039024A2 EP 0112609 W EP0112609 W EP 0112609W WO 03039024 A2 WO03039024 A2 WO 03039024A2
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WO
WIPO (PCT)
Prior art keywords
power level
network
mobile station
tbf
downlink
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.)
Ceased
Application number
PCT/EP2001/012609
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English (en)
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WO2003039024A3 (fr
Inventor
Regina Rodriguez Gil
Javier Romero Garcia
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Inc
Original Assignee
Nokia Inc
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 Inc filed Critical Nokia Inc
Priority to AU2002224818A priority Critical patent/AU2002224818A1/en
Priority to PCT/EP2001/012609 priority patent/WO2003039024A2/fr
Publication of WO2003039024A2 publication Critical patent/WO2003039024A2/fr
Anticipated expiration legal-status Critical
Publication of WO2003039024A3 publication Critical patent/WO2003039024A3/fr
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [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]
    • H04W52/265—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the quality of service QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/08—Closed loop power control

Definitions

  • the invention relates to a method for controlling in a GPRS (General Packet Radio Service) and/or EGPRS (enhanced GPRS) network the power level employed for downlink transmissions from said network to at least one mobile station.
  • the invention equally relates to a corresponding network, to a PCU (Packet Control Unit) for such a network, to a downlink power control algorithm for such a PCU and to a medium storing such an algorithm.
  • PCU Packet Control Unit
  • GPRS is a communications system which enables the transmission of data end-to-end in packet transfer mode, i.e. without utilizing network resources in circuit switched mode.
  • EGPRS enables in addition higher data rates than GPRS.
  • Mobile subscribers can establish a connection with a GPRS and/or EGPRS network via a radio link to a base transceiver station BTS of the network.
  • the BTS is part of a base station subsystem BSS of the network. Within this BSS it is connected to a base station controller BSC, which also provides an access to a core network.
  • a power control for the radio connections between a BTS and mobile stations is important for achieving a high spectrum efficiency and a low power consumption.
  • the main goals of a power control are to reduce cochannel interference and to increase the capacity of the system.
  • uplink power control is known from the practice for GPRS.
  • some GPRS specific aspects have to be taken into account .
  • a TBF is a physical connection used to support the unidirectional transfer of logical link control (LLC) protocol data units (PDU) on packet data physical channels.
  • LLC logical link control
  • the network has to assign each uplink radio block dynamically to a mobile station.
  • a uplink state flag (USF) of 3 bits is transmitted in a downlink radio block to the respective mobile station to which an uplink radio block is to be assigned.
  • uplink state flags are mentioned for example in the technical report 3GPP TS 04.60 V8.7.0 (2000-11): "3rd Generation Partnership Project; Technical Specification Group GSM EDGE Radio Access Network; General Packet Radio Service (GPRS) ; Mobile Station (MS) - Base Station System (BSS) interface; Radio Link Control/ Medium Access Control (RLC/MAC) protocol (Release 1999)".
  • the operator of a network will usually set a minimum power level with which the USF block has to be transmitted. This minimum power has to be guaranteed by the employed power control. Further, a power level is used by a BTS for an entire time slot employed in a downlink transmission.
  • a USF block may share such a time slot with other blocks, in particular with a radio link control (RLC) block carrying user data.
  • RLC radio link control
  • a USF block and an RLC block transmitted in a single time slot may be addressed to a single mobile station. But equally, the blocks can be addressed to different mobile stations located at different distances from the BTS. In order to ensure that both mobile stations receive the respective block correctly, the output power employed for the time slot has to be sufficiently high for a downlink transmission to both mobile stations.
  • This object is reached on the one hand with a method for controlling in a GPRS and/or EGPRS network the power level employed for downlink transmissions from the network to at least one mobile station. It is proposed that this method comprises adjusting the power level for a downlink transmission based on at least one measurement value indicating the quality of a radio link to be used for the downlink transmission to the at least one mobile station. The at least one measurement value was measured at the at least one mobile station for a preceding downlink transmission and transmitted by the at least one mobile station to the network.
  • the object of the invention is equally reached with a GPRS and/or EGPRS network comprising a BSC connected to a BTS, via which BTS radio links are established between the network and mobile stations.
  • the BSC comprises a PCU with means for adjusting a power level employed by the BTS for downlink transmissions according to the proposed method.
  • the object is further reached with a corresponding PCU, with a software constituting the proposed means for such a PCU, and with storing means in which such a software is stored.
  • a packet control unit PCU of some network element of a GPRS and/or EGPRS network can control the power level employed by a BTS for downlink transmissions to a mobile station.
  • the PCU comprises means, in particular a downlink power control algorithm, for realizing the proposed method.
  • the PCU can be located in particular in a BSC of the network, but e.g. as well at the BTS or at the GSN (GPRS Support Node) site.
  • the invention proceeds from the idea that in GPRS and/or EGPRS networks, downlink power control can be based on measurement values. which are transmitted by the mobile station to the network and which indicate the current quality " o " the radio " link to this " mobile station.
  • the invention thus allows to adapt the output power to the respective radio link conditions. Accordingly, the output power can be minimized to a value which still ensures a good quality in the communications. Thereby, cochannel interference is reduced and the capacity of the system increased since a higher throughput per cell can be achieved. Also less interference is generated to speech services when GPRS/EGPRS is employed in the same band as speech.
  • the power level employed for downlink transmission is decreased by one step. If the quality level is lower than a minimum threshold value, the power level employed for downlink transmission is increased by one step.
  • Minimum and maximum threshold values can be defined a priori by the operator of the network. Equally, the step size can be an internal parameter in dBs . It is to be noted that the step size can be different for increasing the downlink power level and for decreasing the downlink power level.
  • the power level set for the downlink transmission of different blocks addressed to different mobile stations but transmitted with the same output power is high enough for each of the mobile stations by selecting the most restrictive power level required by any of the mobile stations.
  • a timer is provided in the network for each mobile station in transfer mode. A timer is started when measurement values from the mobile station to which the timer is assigned are received by the network.
  • the power level is set according to the last received quality measurements and increased according to the time elapsed since these measurement values were received. In case no measurements are available from a mobile station to which a USF is to be transmitted, the maximum power is used for transmission.
  • a similar approach is used for the establishment of a new TBF.
  • the power level that is to be used for the first transfer period of a new TBF is increased with the time that has passed since the transmission of the last transfer period of the previous TBF.
  • the same timer can be used for determining the power level to be employed for the transmission of USF blocks and for determining the power level to be employed for the first transfer period of a new TBF.
  • the timer can be either part of the PCU or the PCU has access to the respective timer value.
  • the power could alternatively set to the maximum power level immediately.
  • the invention can use as quality level that is compared to predetermined threshold values any suitable value indicative of the quality of the radio link during the preceding transmission.
  • Possible values are power levels, e.g. CIR (Carrier to Interference Ratio) values, or quality levels, like the reception quality (RXQUAL) for GPRS, and the mean bit error probability (Mean(BEP)) or the standard deviation of the bit error probability (std(BEP)) for EGPRS.
  • BEP mean bit error probability
  • std(BEP) standard deviation of the bit error probability
  • BLER block error rate
  • BLER values constitute a better quality indicator than other parameters, since BLER values measure the bit errors after the error correction mechanism, whereas other quality parameters measure the bit errors before decoding. Using BLER values, changes in the efficiency of the error correction mechanism due to functionalities introduced in the network are taken into account .
  • Fig. 1 illustrates downlink power control interactions for a first situation according to an embodiment of the invention
  • Fig. 2 shows a second possible situation in which a downlink power control according to the embodiment of the invention can be employed
  • Fig. 3 is a flow chart for a part of a downlink power control according to the embodiment of the invention
  • Fig. 4 illustrates the determination of BLER values for
  • Fig. 5 illustrates the determination of the downlink power level to be used for USF blocks in the embodiment of the invention
  • Fig. 6 illustrates the determination of the downlink power level to be used for a new TBF in the embodiment of the invention.
  • Figure 1 shows a part of a GPRS system enabling a downlink power control according to the invention.
  • a BSS of a random access network is formed by a BSC 11 and a BTS 12 which are connected to each other.
  • a mobile station MS 14 is further connected to the BTS 12 via an antenna " of the BTS ⁇ ⁇ 2.
  • the mobile station 14 has an established downlink to the BSS and it performs quality measurements in the downlink.
  • the measurement values comprise the reception quality and the signal variance.
  • the mobile station 14 further filters the measurement values in order to avoid fluctuations due to temporal dependencies.
  • the filtered measurement values are then transmitted by the mobile station 14 in a quality report via the BTS 12 to the BSC 11.
  • the mobile station 14 transmits the measurement report to the BSS in 'packets downlink acknowledged/unacknowledged' messages. These messages are sent from the mobile station 14 to the BSS, when the BSS requests them from the mobile station 14.
  • the PCU 13 is responsible for the downlink power control.
  • a downlink power control algorithm is implemented in the PCU 13.
  • the included measurement values are collected.
  • the algorithm determines on the basis of these measurement values the output power that is to be used by the BTS 12 for a downlink transmission to the mobile station 14 in an assigned time slot of a subsequent transmission period.
  • the determined power level is forwarded to the BTS 12, and the BTS 12 uses this power level for the next downlink transmission to the mobile station 14.
  • a time slot used in downlink transmissions can comprise an RLC block including user data and control data, an USF block assigning an uplink radio block to a mobile station, or both.
  • both blocks can be addressed to the same mobile station, e.g. mobile station 14 of figure 1. But equally, they may be directed at different mobile stations. The latter situation is •illustrated in figure 2.
  • two mobile stations 21, 22 are connected to a BTS 12 of a GPRS network.
  • the BTS 12 corresponds to the BTS of figure 1.
  • the first mobile station 21 is located at a greater distance from the BTS 12 than the second mobile 22 station.
  • the first mobile 21 station has link conditions of a worse quality than the second mobile station 22.
  • the BTS 12 now transmits a USF block to the first mobile station 21 and an RLC block to the second mobile 22 station using a single time slot. It has thus to be ensured that the power level assigned to this single time slot is sufficiently high for the mobile station 22 to which the RLC block is addressed and for the mobile station 21 to which the USF block is addressed.
  • FIG. 3 is a flow chart of a part of the algorithm implemented in the PCU of figure 1.
  • a first stored threshold value USF_quality_level min is the minimum quality level that is permitted by the operator for USF blocks.
  • Two further threshold values Qualtiy_level min and Quality_level max constitute a lower and an upper quality limit for any other block. They are internally determined by quality thresholds for GPRS.
  • the determined USF quality level is compared to the predetermined threshold value USF_quality_level min .
  • the power level Pow that was used for transmitting the same time slot in the preceding transmission period is increased by a step D to a resulting power level Powout .
  • the minimum value set by the operator is ensured by the power level employed for the preceding transmission of the corresponding time slot, and possible further adjustments of the power level are based on the determined RLC quality level.
  • the corresponding evaluations are surrounded in the flow chart by a rectangle.
  • the determined RLC quality level is compared to the predetermined threshold value Quality_level raax . In case this threshold value is exceeded, the power level Pow that was used for transmitting the same time slot in the preceding transmission period is decreased by a step D to a resulting power level Powout .
  • the determined RLC quality level is compared in addition to the predetermined threshold value Quality_level min .
  • the power level Pow that was used for transmitting the same time slot in the preceding transmission period is increased by a step D to a resulting power level Powout .
  • the comparison of a USF quality level can be omitted.
  • the step size D used to update the BTS output power may be different for reducing and increasing the BTS output power. If this is the case, the step size used for increasing the output power should be larger than the step used for decreasing the output power, since the power reduction can imply a quality reduction as well.
  • BLER values are used as quality levels.
  • BLER values can be estimated based on the used modulation coding scheme and the measurements reported by the mobile station in a quality report to the BSS.
  • Figure 4 illustrates a corresponding mapping of measurement values to a BLER value .
  • a table in form of a coordinate system is shown for EGPRS.
  • the x-axis corresponds to the mean bit error probability mean(BEP), and the y-axis to the standard deviation of the bit error probability std(BEP) .
  • mean(BEP) and std(BEP) To each possible combination of mean(BEP) and std(BEP), a BLER value is assigned, taking account of the employed modulation scheme.
  • the values of ean(BEP) and std(BEP) received by the mobile station for a downlink connection in a measurement report are mapped to a BLER value in the table. This is indicated in the table for one pair of parameter values and one resulting BLER by a filled black circle.
  • FIG. 4 A similar table is shown on the right hand side of figure 4 for GPRS.
  • the x-axis corresponds to the signal variance SIGN_VAR and the y-axis to the reception quality RXQUAL.
  • a BLER value is assigned, taking account of the employed modulation scheme.
  • the values of the signal variance and the reception quality received by the mobile station for a downlink connection in a measurement report are mapped to a BLER value in the table. This is indicated in the table again for one pair of parameter values and one resulting BLER by a filled black circle.
  • Such tables for GPRS and EGPRS are assembled for both, RLC blocks and USF blocks. They differ in the values of the BLER assigned to the respective combinations of received measurement values. The respective BLER values depend on the employed coding scheme, which is fixed.
  • the assembled tables are stored in the PCU 13 and consulted at the beginning of the downlink power control algorithm in order to determined the respective BLER values and thus the required RLC and USF quality levels.
  • the algorithm of figure 3 can be employed without any further considerations only in case recent quality measurements related to RLC and USF blocks are available.
  • RLC and USF quality levels will be determined based on downlink quality measurements made by this single mobile station in the established downlink and on mapping tables stored for RLC and USF mapping. These quality levels can be used in the algorithm of figure 3.
  • the RLC block and USF block are addressed to different mobile stations, as depicted in figure 2.
  • Downlink quality measurements from the mobile station 22 that is to receive the RLC block are collected and converted into an RLC quality level.
  • the mobile station 21 that is to receive the USF block has an established downlink, so downlink quality measurements related to the USF block can be collected from the last packet that was sent by this mobile station 21 for the downlink.
  • the BSC 11 includes a timer for each mobile station in transfer mode.
  • the timers can be implemented using the frame numbers (FN) .
  • the respective timer is started anew each time a packet with measurements from the assigned mobile station arrives at the BSS.
  • the quality measurements are collected from the packet and the USF quality level is determined according to a stored mapping table as described above.
  • a power level required for the transmission of the USF block is determined based on the USF quality level, similarly as in the respective part of the flow chart of figure 3.
  • This power level is increased according to the value of the timer at the time when the power level is to be set for a time slot comprising a USF block for the mobile station for which the USF quality level was determined.
  • a power level required for the RLC block in the same time slot is determined based on the measurement values of the respective mobile station 22 for the time slot of the preceding transfer period, similarly as in the corresponding part of figure 3.
  • the output power of the BTS is adjusted to the power level determined for the RLC block or to the increased power level for the USF block, whichever is higher. In case the timer expired before the power level is to be determined for a specific time slot, the time slot is transmitted with full output power.
  • Figure 5 is a coordinate system in which the output power to be determined for a USF block is depicted over the timer value beginning from a point of time at which the timer starts to a point of time at which the timer expires.
  • the BTS output power could change from the power value Pot ACK/NACK determined based on the measurements collected from the last packet to a maximum power value Pot max while the timer is running.
  • the step by which the power is increased is fixed.
  • the transition function 51 is linear and thus the timer step is fixed as well.
  • the function 52 is a parabola, and the timer steps until the next increase in power are varying. The timer steps increase with the second function 52 with the timer value. For both cases, four steps from a first to a second power level are indicated.
  • the timer will be reset when the timer expires, when a new packet with measurements is collected and when the maximum power is reached by the BTS 12.
  • the RLC and USF blocks are addressed again to different mobile stations.
  • the mobile station which is to receive the USF block has only an established uplink. This means that there are not downlink measurements except those which are sent in the measurement reports. The occurrence of these reports is very rare. Therefore in this situation, the most conservative solution is implemented, i.e. the blocks are transmitted with full power in order to avoid loosing USF blocks.
  • the network has to detect in every moment whether a USF flag is addressed to a mobile station without established downlink.
  • a further special approach is provided in the downlink power control algorithm for determining the BTS output power that should be used for the first transfer period of a TBF that is to be established.
  • the output power to be used for the first transfer period of the new TBF is determined based on the last output power that was used in the preceding TBF.
  • a Temporary Flow Identity (TFI) is assigned by the network.
  • TFI Temporary Flow Identity
  • the mobile station assumes that the TFI value is unique among concurrent TBFs in the same direction, i.e. uplink or downlink, on all PDCHs used for the TBF.
  • a first timer T3192 on the mobile station side waits for the release of a TBF after reception of the final block. This timer is started when the mobile station has received all RLC data blocks. When the timer expires, the mobile station releases the resources associated with the current TBF, e.g. the TFI, and begin to monitor its paging channel .
  • a second timer T3193 on the network side waits for the reuse of a TFI after the reception of a final packet downlink Ack/Nack from the mobile station.
  • This timer is used to define the point of time at which the timer T3192 has surely expired so that the TFI can be reused. Its value is network dependent .
  • the proposed new timer After reception of the final packet with measurements in the last TBF, the proposed new timer starts. While the new timer is running and timer T3193 has not expired, the output power applied in the first transfer period in the next TBF depends on the time elapsed since the start of the timer. The output power can be increased with time as described with reference to USF and figure 5. After the new timer or the timer T3193 has expired, the BTS shall transmit with full output power for the first transfer period in the next TBF.
  • the BTS could transmit immediately with maximum power.
  • the presented embodiment of the invention is based on another approach for the case that a new TBF uses another time slot or another transceiver than a previous TBF.
  • the BTS transmits at least with a power value that assures a predetermined receiving power level Rxlev for the mobile station.
  • a new operator parameter Min_Rxlev_GPRS_DL is introduced. The value of this parameter is the minimum receiving power level that the mobile has to receive in order to be able to decode the signal correctly.
  • the BTS output power will have to guarantee this Rxlev value at least for the first transfer period.
  • the path loss is calculated for the mobile station that has established the TBF.
  • the calculation is based on the last receiving power level Last_Rxlev and the last power value Last_Power used for the previous TBF:
  • Path _ Loss Last _ Power — Last __ Rxlev
  • the transmission power level required to assure the minimum receiving power level for GPRS downlink transmissions Min_Rxlev_GPRS_DL for this mobile station is calculated based on the determined path loss:
  • BTS _ Output _ Power Power (Min _ Rxlev _ GPRS _ DL) + /(time _ between _ TBFs)
  • Figure 6 shows again a coordinate system in which the output power is depicted over the timer value, which indicates in this case the time between an old and a new TBF. It shows how the power is increased according to a linear function 61 in equal steps of time beginning from the time the timer is started.
  • the maximum value of the function which is reached when the timer expires, is normalized in order to assure that the maximum value for the sum is full power Pmax-P. Again, four steps from a first to a second power level are indicated.
  • Min_Rxlev_GPRS_DL which constitutes the minimum receiving power level required at a mobile station for downlink transmissions in a GPRS system needs to be optimized. But since all TBFs start with the same coding scheme, the parameter requires only one Automatic Parameter Optimization.
  • the invention enables a downlink power control which is suited to solve two problems, i.e. the USF limitation and the determination of an output power for a first transfer period, with only one timer.

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

Abstract

La présente invention concerne un procédé de régulation dans un réseau GPRS et/ou EGPRS (11-13) du niveau de puissance employé pour des transmissions de liaison descendante dudit réseau (11,-13) à au moins une station mobile (14, 21, 22). Afin de permettre ladite régulation de puissance, le procédé de l'invention comprend la régulation du niveau de puissance d'une transmission de liaison descendante en se basant sur au moins une valeur de mesure indiquant la qualité d'une liaison radio à utiliser pour la transmission de liaison descendante en direction de la/des station(s) mobile(s) (14, 21, 22). La/les valeur(s) de mesure a/ont été obtenue(s) préalablement au niveau de la/des station(s) mobile(s) (14, 21, 22) pour une transmission de liaison descendante précédante et transmises au réseau (11-13) par la/les station(s) mobile(s) (14, 21, 22).
PCT/EP2001/012609 2001-10-31 2001-10-31 Regulation de puissance de liaison descendante Ceased WO2003039024A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002224818A AU2002224818A1 (en) 2001-10-31 2001-10-31 Downlink power control
PCT/EP2001/012609 WO2003039024A2 (fr) 2001-10-31 2001-10-31 Regulation de puissance de liaison descendante

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Application Number Priority Date Filing Date Title
PCT/EP2001/012609 WO2003039024A2 (fr) 2001-10-31 2001-10-31 Regulation de puissance de liaison descendante

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WO2003039024A3 WO2003039024A3 (fr) 2007-11-15

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1672815A1 (fr) * 2004-12-17 2006-06-21 Alcatel Procédé de fonctionnement d'un système de communication sans fils
US7423986B2 (en) * 2004-03-26 2008-09-09 Cisco Technology, Inc. Providing a multicast service in a communication network
CN107172702A (zh) * 2017-05-17 2017-09-15 奇酷互联网络科技（深圳）有限公司 移动终端及其WiFi发射功率的调整方法和装置
WO2019096980A1 (fr) * 2017-11-20 2019-05-23 Sagemcom Broadband Sas Procede de gestion d'une puissance d'emission optimale d'un point d'acces wi-fi, et le point d'acces wi-fi correspondant

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1050977B1 (fr) * 1999-05-06 2012-11-07 Alcatel Lucent Système de commande de puissance de transmission utilisant des messages d'accusé de réception
EP1216520B1 (fr) * 1999-09-17 2005-11-09 Motorola, Inc. Procede et appareil de commande de puissance d'emission
US7177298B2 (en) * 2000-01-07 2007-02-13 Gopal Chillariga Dynamic channel allocation in multiple-access communication systems

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7423986B2 (en) * 2004-03-26 2008-09-09 Cisco Technology, Inc. Providing a multicast service in a communication network
AU2005236770B2 (en) * 2004-03-26 2010-04-29 Cisco Technology, Inc. Providing a multicast service in a communication network
EP1672815A1 (fr) * 2004-12-17 2006-06-21 Alcatel Procédé de fonctionnement d'un système de communication sans fils
CN107172702A (zh) * 2017-05-17 2017-09-15 奇酷互联网络科技（深圳）有限公司 移动终端及其WiFi发射功率的调整方法和装置
CN107172702B (zh) * 2017-05-17 2021-06-15 奇酷互联网络科技（深圳）有限公司 移动终端及其WiFi发射功率的调整方法和装置
WO2019096980A1 (fr) * 2017-11-20 2019-05-23 Sagemcom Broadband Sas Procede de gestion d'une puissance d'emission optimale d'un point d'acces wi-fi, et le point d'acces wi-fi correspondant
FR3074005A1 (fr) * 2017-11-20 2019-05-24 Sagemcom Broadband Sas Procede de gestion d'une puissance d'emission optimale d'un point d'acces wi-fi
CN111434156A (zh) * 2017-11-20 2020-07-17 萨基姆宽带连接公司 用于管理wi-fi接入点的最佳发射功率的方法和对应的wi-fi接入点
US11147027B2 (en) 2017-11-20 2021-10-12 Sagemcom Broadband Sas Method for managing optimal transmission power of a Wi-Fi access point

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AU2002224818A1 (en) 2003-05-12
WO2003039024A3 (fr) 2007-11-15
AU2002224818A8 (en) 2008-01-10

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