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WO2024188447A1 - Sélection de schéma de réutilisation de canal de fréquence et de puissances d'émission - Google Patents

Sélection de schéma de réutilisation de canal de fréquence et de puissances d'émission Download PDF

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Publication number
WO2024188447A1
WO2024188447A1 PCT/EP2023/056375 EP2023056375W WO2024188447A1 WO 2024188447 A1 WO2024188447 A1 WO 2024188447A1 EP 2023056375 W EP2023056375 W EP 2023056375W WO 2024188447 A1 WO2024188447 A1 WO 2024188447A1
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WIPO (PCT)
Prior art keywords
frequency channel
wireless
link
transmit powers
wireless links
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Pending
Application number
PCT/EP2023/056375
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English (en)
Inventor
Magnus Nilsson
Mikael Coldrey
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Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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.)
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Publication date
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Priority to PCT/EP2023/056375 priority Critical patent/WO2024188447A1/fr
Publication of WO2024188447A1 publication Critical patent/WO2024188447A1/fr
Anticipated expiration legal-status Critical
Pending 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]
    • H04W52/267—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate
    • 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
    • H04W52/24—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

Definitions

  • An object of embodiments herein is to address the above issues.
  • a particular object is to enable the available spectrum to be used more efficiently.
  • a particular object is to provide higher capacity in a fixed wireless network.
  • a method for selecting a frequency channel reuse scheme, and transmit powers, for a fixed wireless network is performed by a network control unit.
  • the network control unit comprises a select module configured to select the frequency channel reuse scheme by determining which of the frequency channels to be allocated to which of the wireless links, and determining the transmit powers to be used for each of the wireless links, based on the obtained information.
  • a select module configured to select the frequency channel reuse scheme by determining which of the frequency channels to be allocated to which of the wireless links, and determining the transmit powers to be used for each of the wireless links, based on the obtained information.
  • a fourth aspect there is presented a computer program for selecting a frequency channel reuse scheme and transmit powers for a fixed wireless network. At least partly overlapping frequency channels are available for communication over wireless links in the fixed wireless network.
  • the computer program comprises computer code which, when run on processing circuitry of a network control unit, causes the network control unit to perform actions. One action comprises the network control unit to obtain information of interference among the wireless links, traffic demand per wireless link, and link gain per wireless link.
  • One action comprises the network control unit to select the frequency channel reuse scheme by determining which of the frequency channels to be allocated to which of the wireless links, and determining the transmit powers to be used for each of the wireless links, based on the obtained information.
  • a computer program product comprising a computer program according to the fourth aspect and a computer readable storage medium on which the computer program is stored.
  • the computer readable storage medium could be a non-transitory computer readable storage medium.
  • these aspects do not suffer from the above-mentioned issues.
  • these aspects enable the available spectrum to be used more efficiently.
  • these aspects yield higher capacity in the fixed wireless network. This is achieved by using the available spectrum more efficiently.
  • Fig.1 is a schematic diagram illustrating a network according to embodiments
  • Fig.2 schematically illustrates frequency channel reuse schemes in a fixed wireless network according to embodiments
  • Figs.3, 4, and 5 show simulation results according to embodiments
  • Figs.6 and 7 are flowcharts of methods according to embodiments
  • Fig.8 is a schematic diagram showing functional units of a network control unit according to an embodiment
  • Fig.9 is a schematic diagram showing functional modules of a network control unit according to an embodiment
  • Fig.10 shows one example of a computer program product comprising computer readable storage medium according to an embodiment.
  • FIG. 1 is a schematic diagram illustrating a network 100 where embodiments presented herein can be applied.
  • the network 100 comprises wireless links 120a:120h (eight in total) extending between transceiver points 110a:110g (seven in total).
  • the network 100 is a fixed wireless network.
  • Frequency channels or carriers
  • These frequency channels might either all be of the same bandwidth, or there are at least two frequency channels with different bandwidths. In any case, all frequency channels share the same spectrum.
  • How the frequency channels are assigned to the wireless links 120a:120h is defined by a frequency channel reuse scheme. As an introductory example, consider the fixed wireless network with two wireless links as illustrated in Fig.2, where three different frequency channel reuse schemes 200a, 200b, 200c are illustrated. A first wireless link extends between transceiver points 110a and 110c.
  • a second wireless link extends between transceiver points 110b and 110d.
  • Each wireless link has 112 MHz of total bandwidth available.
  • Each frequency channel reuse scheme 200a:200c represents a different ways of assigning frequency channels (or carriers) in the fixed wireless network.
  • the available bandwidth can be split into two different 56 MHz frequency channels where separate frequency channels, ⁇ 1, ⁇ 2, are assigned to each of the wireless links. This is referred to as reuse 2.
  • frequency channel reuse scheme 200b there will be interference between the two wireless links. The amount of interference depends on the antenna discrimination, channel gains, and output powers.
  • frequency channel reuse scheme 200b can be implemented either by a single 112 MHz channel or two 56 MHz channels (i.e., using carrier aggregation). However, two 56 MHz channels might be preferred for full adaptation since then it is also possible to mix reuse 1 with a reuse 2 scenario, where one wireless link can use 112 MHz bandwidth and the other wireless link can use 56 MHz bandwidth.
  • frequency channel reuse scheme 200c also referred to as mixed reuse.
  • the illustrated frequency channel reuse schemes 200a:200c are just examples. As noted above, there is a need for effective reuse of frequency channels. The embodiments disclosed herein therefore relate to techniques for selecting a frequency channel reuse scheme and transmit powers for a fixed wireless network 100.
  • a network control unit 130, 800, 900 a method performed by the network control unit 130, 800, 900, a computer program product comprising code, for example in the form of a computer program, that when run on a network control unit 130, 800, 900, causes the network control unit 130, 800, 900 to perform the method.
  • the embodiments disclosed herein enables adaptive frequency channel allocation that employs adaptive allocations between different frequency channel reuse schemes 200a:200c in a fixed wireless network.
  • the adaptive allocation is based on current traffic demands, capacity utilizations, and channel and interference qualities in the fixed wireless network.
  • the fixed wireless network shown in Fig.2 with two 56 MHz carriers available per wireless link is taken as an illustrative example of which frequency channel reuse scheme 200a:200c to use for the current set of parameters in terms of current traffic demands, capacity utilizations, and channel and interference qualities in the fixed wireless network.
  • Each given wireless link is assumed to have a certain traffic demand that varies over time. To meet the traffic demand, a certain capacity over the given wireless link is needed.
  • the capacities supported for each frequency channel is a discrete number, where each capacity corresponds to a certain coding and modulation configuration.
  • Each capacity requires a certain signal to interference plus noise ratio (SINR) at the receiver.
  • SINR signal to interference plus noise ratio
  • Table 1 One example of a mapping between capacity and SINR is provided in Table 1.
  • Table 1 Different capacities supported by a frequency channel and the required SINR to fulfill that capacity.
  • the total capacity over a wireless link is the sum of the capacities of the two frequency channels, see Eq.1Fel! Hittar inte referenshimlla..
  • ⁇ ⁇ is the total capacity for wireless link ⁇ summed over the first frequency channel ( ⁇ 1) and the second frequency channel ( ⁇ 2), respectively.
  • ⁇ ⁇ is the total capacity for wireless link ⁇ summed over the first frequency channel ( ⁇ 1) and the second frequency channel ( ⁇ 2), respectively.
  • the SINRs for each wireless link for the second frequency channel is given by Eq.4 and Eq.5, where all the parameters are known except the transmit powers ⁇ , ⁇ and ⁇ , ⁇ .
  • a first equation system is formed by Eqs.2 and 3
  • a second equation system is formed by Eqs.4 and 5.
  • ⁇ ⁇ , ⁇ , ⁇ is total link gain for wireless link ⁇ for frequency channel ⁇
  • ⁇ ⁇ , ⁇ , ⁇ is total link gain between link ⁇ and ⁇ for frequency channel ⁇
  • ⁇ , ⁇ and ⁇ , ⁇ are transmit powers for frequency channel ⁇ of link ⁇ and ⁇ , respectively
  • ⁇ ⁇ , ⁇ is the noise power for wireless link ⁇ and frequency channel ⁇
  • ⁇ ⁇ , ⁇ , ⁇ is the required SINR for wireless link ⁇ and frequency channel ⁇ (e.g., given by the traffic demand that is mapped to SINR via the capacity as in below Table 1).
  • the two equation systems can be solved for the transmit powers independently of each other.
  • all transmit powers must be positive numbers.
  • the power for each frequency channel must be within ⁇ , ⁇ , ⁇ ⁇ ⁇ , ⁇ ⁇ ⁇ , ⁇ , ⁇ .
  • the sum of the transmit powers for each frequency channel must be within ⁇ , ⁇ , ⁇ ⁇ ⁇ , ⁇ ⁇ ⁇ , ⁇ , ⁇ , ⁇ . If the transmit powers are within the restrictions, there is a valid solution to the traffic demand for the wireless links in the fixed wireless network.
  • Figs.3, 4, and 5 shows simulation results of possible capacities for the examples illustrated in Fig.2 for different antenna discriminations between the wireless links.
  • the antenna discrimination represents the isolation between the two wireless links that is provided by the antenna radiation patterns.
  • Fig. 3 shows the possible rate combinations with an antenna discrimination of 20 dB. If a capacity above 500 Mbps (Megabits per second) is requested for both wireless links, it is favorable to use reuse 2 (or even mixed use). Instead, if a capacity above 600 Mbps is requested for one of the wireless links whilst a capacity of no more than 150 Mbps is requested for the other wireless links, then it is favorable to use reuse 1 (or even mixed use). Fig.
  • FIG. 4 shows the possible rate combinations with an antenna discrimination of 16 dB between the two wireless links.
  • Fig. 5 shows the possible rate combinations with an antenna discrimination of 26 dB between the two wireless links.
  • frequency reuse 1 or mixed reuse unless if the traffic demand is low.
  • Fig. 6 is a flowchart illustrating embodiments of methods for selecting a frequency channel reuse scheme and transmit powers for a fixed wireless network 100. There can be different examples of fixed wireless networks 100.
  • the fixed wireless network 100 is any of: a microwave network, a fixed wireless access network, a fixed wireless backhaul network. At least partly overlapping frequency channels 210:230 are available for communication over wireless links 120a:120h in the fixed wireless network 100. In some aspects each of the frequency channels 210:230 corresponds to a carrier. Therefore, the terms frequency channel and carrier can be used interchangeably.
  • the methods are performed by the network control unit 130, 800, 900. The methods are advantageously provided as computer programs 1020. S102: The network control unit 130, 800, 900 obtains information of interference among the wireless links 120a:120h, traffic demand per wireless link 120a:120h, and link gain per wireless link 120a:120h.
  • the network control unit 130, 800, 900 selects the frequency channel reuse scheme 200a:200c by determining which of the frequency channels 210:230 to be allocated to which of the wireless links 120a:120h based on the obtained information and determines the transmit powers to be used for each of the wireless links 120a:120h also based on the obtained information.
  • Embodiments relating to further details of selecting a frequency channel reuse scheme and transmit powers for a fixed wireless network 100 as performed by the network control unit 130, 800, 900 will now be disclosed with continued reference to Fig.6.
  • information of the selected frequency channel reuse scheme 200a:200c can be provided to the transceiver points 110a:110g in the fixed wireless network 100.
  • the network control unit 130, 800, 900 is configured to perform (optional) step S106.
  • the transceiver points 110a:110g can operate in accordance with the selected frequency channel reuse scheme 200a:200c.
  • the method comprises evaluating different frequency channel reuse schemes 200a:200c selected from the set of available frequency channel reuse schemes 200a:200c and determining one set of transmit powers to be used for each of the wireless links 120a:120h for each of the evaluated frequency channel reuse schemes 200a:200c.
  • One selection criterion is to select the reuse schemes 200a:200c yielding lowest transmit powers. That is, in some embodiments, the frequency channel reuse scheme 200a:200c for which the set of transmit powers, or power consumption, is lowest is selected.
  • the frequency channel reuse scheme 200a:200c is selected, and the transmit powers are determined, based on information of interference among the wireless links 120a:120h, traffic demand per wireless link 120a:120h, and link gain per wireless link 120a:120h.
  • further information referred to as side information
  • side information is taken into consideration. Aspects relating to different examples of side information will now be disclosed. As disclosed above, it might be conditioned that the transmit powers are within some intervals. This could be one example of side information. Particularly, in some embodiments, the transmit powers are conditioned to be within a power interval, wherein the power interval depends on which number of radio units are available per wireless link 120a:120h.
  • the capacity of some of the wireless links must be reduced below the traffic demand.
  • the traffic demand per wireless link 120a:120h is reduced until the transmit powers for at least one of the evaluated frequency channel reuse schemes 200a:200c are determined to be inside the power interval.
  • the lower the antenna discrimination the more interference between the wireless links, and vice versa. Antenna discrimination could therefore be one example of side information.
  • each of the different frequency channel reuse schemes 200a:200c is associated with capacity characteristics 400:600 provided per antenna discrimination, and which of the frequency channel reuse schemes 200a:200c that are evaluated is determined based on the capacity characteristics 400:600 and the antenna discrimination.
  • the antenna discrimination corresponds to the interference among the wireless links 120a:120h.
  • the transmit powers could further be determined based on thermal noise power per frequency channel and per wireless link 120a:120h.
  • the thermal noise power equally affects each frequency channel and each wireless link 120a:120h.
  • the free space pathloss (FSLP) is part of the link gain and the FSLP can be calculated as in Eq.6. 4 ⁇ ⁇ F SPL ⁇ 10log ⁇ ⁇ ⁇ ⁇ , ⁇ 6 ⁇ where ⁇ is the ⁇ is the speed of light.
  • the link gain in dB, between two wireless links is defined in Eq. 7.
  • antGain ⁇ ⁇ ⁇ ⁇ is the transmit antenna gain for angle ⁇ ⁇
  • antGain ⁇ ⁇ ⁇ ⁇ is the receiver antenna gain for angle ⁇ ⁇
  • ⁇ ⁇ is the angle from the boresight of the transmit antenna pointing towards the receiver antenna
  • ⁇ ⁇ is the angle from the boresight of the receive antenna pointing towards the transmitter
  • FSPL is the free space pathloss as defined in Eq.6.
  • the link gain is calculated between all ⁇ wireless links in the fixed wireless network and can be represented by a total link gain matrix of size ⁇ ⁇ ⁇ , as in Eq.8. 8 ⁇ where ⁇ ⁇ , ⁇ , ⁇ is the link gain for wireless link 1 ⁇ on frequency channel cm, ⁇ ⁇ , ⁇ , ⁇ is the link gain (interference) from wireless link ⁇ towards wireless link ⁇ , ⁇ ⁇ ⁇ , ⁇ 1 ⁇ ⁇ , ⁇ ⁇ ⁇ ⁇ on frequency channel cm.
  • the transmit power for each wireless link can be calculated, based on the required SINR to fulfill a specific capacity; for example according to the mapping in Table 1.
  • the transmit powers could be determined by solving equation systems, where there are as many equation systems as frequency channels, and as many equations per equation system as there are wireless links 120a:120h. As above, in the equation systems, the traffic demand per wireless link 120a:120h can be represented by a respective SINR value. Generally, the transmit powers could then be determined by solving Eq.9.
  • ⁇ ⁇ , ⁇ ⁇ , ⁇ ⁇ , ⁇ , ⁇ is total link gain between link ⁇ and ⁇ for frequency channel ⁇ , ⁇ , ⁇ and ⁇ , ⁇ are transmit powers for frequency channel ⁇ of link ⁇ and ⁇ , respectively
  • ⁇ ⁇ , ⁇ is thermal noise power for wireless link ⁇ and frequency channel ⁇
  • ⁇ ⁇ , ⁇ , ⁇ is the required SINR for wireless link ⁇ and frequency channel ⁇ (e.g., given by the traffic demand that is mapped to SINR via the capacity as in above Table 1).
  • the total link gain also included any fading or blocking.
  • an equation system can be formed, where the number of equation systems equals the number of frequency channels, where the number of equations per equation system equals the number of wireless links, and where the transmit power for each wireless link is unknown and solved by solving the equation systems.
  • Each of the equation systems is formed and solved independently of each other, as for the above example represen ed by Eqs.2, 3, 4, and 5 for two wireless links.
  • Each transmit power might be constrained to ⁇ , ⁇ , ⁇ ⁇ ⁇ , ⁇ ⁇ ⁇ , ⁇ , ⁇ .
  • a solution to the equation systems is valid if all transmit powers are inside the power constraint.
  • the capacities for at least some of the wireless links is reduced so that the power constraints can be met.
  • the capacities should be reduced can be decided by a scheduler or some priority function which is related to traffic priority classes.
  • One illustrative embodiment for selecting a frequency channel reuse scheme (and transmit powers for a fixed wireless network as performed by the network control unit will be disclosed next with reference to the flowchart of Fig. 7.
  • S202 A set of available frequency channel reuse schemes where all frequency channel reuse schemes fulfil the traffic demand is selected.
  • S205 The transmit powers are determined by solving systems of equations for the selected frequency channel reuse scheme, based on interference among the wireless links, the traffic demand per wireless link, and link gain per wireless link, as in Eq.12.
  • S206 It is checked whether the determined transmit powers fulfil power constraints. Step S207 is entered if the constraints for all the transmit power are fulfilled. Else, step S208 is entered.
  • S207 The tested frequency channel reuse scheme is removed from the set of available frequency channel reuse schemes and entered in a set of candidate frequency channel reuse schemes. If the set of available frequency channel reuse schemes is not empty, another frequency channel reuse scheme is selected and step S204 is entered again. Else, step S209 is entered.
  • S208 The tested frequency channel reuse scheme is removed from the set of available frequency channel reuse schemes.
  • Fig. 8 schematically illustrates, in terms of a number of functional units, the components of a network control unit 800 according to an embodiment.
  • Processing circuitry 810 is provided using any combination of one or more of a suitable central processing unit (CPU), multiprocessor, microcontroller, digital signal processor (DSP), etc., capable of executing software instructions stored in a computer program product 1010 (as in Fig.10), e.g. in the form of a storage medium 830.
  • CPU central processing unit
  • DSP digital signal processor
  • the processing circuitry 810 may further be provided as at least one application specific integrated circuit (ASIC), or field programmable gate array (FPGA). Particularly, the processing circuitry 810 is configured to cause the network control unit 800 to perform a set of operations, or steps, as disclosed above.
  • the storage medium 830 may store the set of operations, and the processing circuitry 810 may be configured to retrieve the set of operations from the storage medium 830 to cause the network control unit 800 to perform the set of operations.
  • the set of operations may be provided as a set of executable instructions.
  • the storage medium 830 may also comprise persistent storage, which, for example, can be any single one or combination of magnetic memory, optical memory, solid state memory or even remotely mounted memory.
  • the network control unit 800 may further comprise a communications (comm.) interface 820 at least configured for communications with other entities, functions, nodes, and devices, such as the transceiver points 110a:110g in Fig.1.
  • the communications interface 820 may comprise one or more transmitters and receivers, comprising analogue and digital components.
  • the processing circuitry 810 controls the general operation of the network control unit 800 e.g. by sending data and control signals to the communications interface 820 and the storage medium 830, by receiving data and reports from the communications interface 820, and by retrieving data and instructions from the storage medium 830.
  • Other components, as well as the related functionality, of the network control unit 800 are omitted in order not to obscure the concepts presented herein. Fig.
  • the network control unit 900 of Fig.9 comprises a number of functional modules; an obtain module 910 configured to perform step S102, and a select module 920 configured to perform step S104.
  • the network control unit 900 of Fig.9 may further comprise a number of optional functional modules, such as a forward module 930 configured to perform step S106.
  • each functional module 910:930 may in one embodiment be implemented only in hardware and in another embodiment with the help of software, i.e., the latter embodiment having computer program instructions stored on the storage medium 830 which when run on the processing circuitry makes the network control unit 130, 800, 900 perform the corresponding steps mentioned above in conjunction with Fig 9. It should also be mentioned that even though the modules correspond to parts of a computer program, they do not need to be separate modules therein, but the way in which they are implemented in software is dependent on the programming language used.
  • one or more or all functional modules 910:930 may be implemented by the processing circuitry 810, possibly in cooperation with the communications interface 820 and/or the storage medium 830.
  • the processing circuitry 810 may thus be configured to from the storage medium 830 fetch instructions as provided by a functional module 910:930 and to execute these instructions, thereby performing any steps as disclosed herein.
  • the network control unit 130, 800, 900 may be provided as a standalone device or as a part of at least one further device. A first portion of the instructions performed by the network control unit 130, 800, 900 may be executed in a first device, and a second portion of the of the instructions performed by the network control unit 130, 800, 900 may be executed in a second device; the herein disclosed embodiments are not limited to any particular number of devices on which the instructions performed by the network control unit 130, 800, 90 may be executed.
  • a network control unit 130, 800, 900 residing in a cloud computational environment. Therefore, although a single processing circuitry 810 is illustrated in Fig.8 the processing circuitry 810 may be distributed among a plurality of devices, or nodes. The same applies to the functional modules 910:930 of Fig.9 and the computer program 1020 of Fig.10. Fig. 10 shows one example of a computer program product 1010 comprising computer readable storage medium 1030.
  • a computer program 1020 can be stored, which computer program 1020 can cause the processing circuitry 810 and thereto operatively coupled entities and devices, such as the communications interface 820 and the storage medium 830, to execute methods according to embodiments described herein.
  • the computer program 1020 and/or computer program product 1010 may thus provide means for performing any steps as herein disclosed.
  • the computer program product 1010 is illustrated as an optical disc, such as a CD (compact disc) or a DVD (digital versatile disc) or a Blu-Ray disc.
  • the computer program product 1010 could also be embodied as a memory, such as a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or an electrically erasable programmable read-only memory (EEPROM) and more particularly as a non-volatile storage medium of a device in an external memory such as a USB (Universal Serial Bus) memory or a Flash memory, such as a compact Flash memory.
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable programmable read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • the computer program 1020 is here schematically shown as a track on the depicted optical disk, the computer program 1020 can be stored in any way which is suitable for the computer program product 1010.
  • the inventive concept has mainly been described above with reference to a few embodiments. However, as is readily appreciated

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Abstract

L'invention concerne des techniques pour sélectionner un schéma de réutilisation de canal de fréquence, et des puissances d'émission, pour un réseau sans fil fixe. Des canaux de fréquence se chevauchant au moins partiellement sont disponibles pour une communication sur des liaisons sans fil dans le réseau sans fil fixe. Un procédé est effectué par une unité de commande. Le procédé consiste à obtenir des informations d'interférence entre les liaisons sans fil, et des informations concernant la demande de trafic et le gain de liaison pour chaque liaison sans fil. Le procédé consiste à sélectionner le schéma de réutilisation de canal de fréquence en déterminant quel canal de fréquence attribuer à quelle liaison sans fil, et à déterminer les puissances d'émission à utiliser pour chacune des liaisons sans fil, sur la base des informations obtenues.
PCT/EP2023/056375 2023-03-13 2023-03-13 Sélection de schéma de réutilisation de canal de fréquence et de puissances d'émission Pending WO2024188447A1 (fr)

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PCT/EP2023/056375 WO2024188447A1 (fr) 2023-03-13 2023-03-13 Sélection de schéma de réutilisation de canal de fréquence et de puissances d'émission

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020060643A1 (en) * 2000-09-21 2002-05-23 Helioss Communication Inc. Point to point communication system with parallel links
WO2003034639A1 (fr) * 2001-10-12 2003-04-24 Nokia Corporation Systeme radio micro-onde adaptatif point a point
WO2004025978A1 (fr) * 2002-09-13 2004-03-25 Telefonaktiebolaget L M Ericsson (Publ) Mecanisme d'optimisation destine a la reutilisation de frequence
US9325409B1 (en) * 2012-04-12 2016-04-26 Tarana Wireless, Inc. Non-line of sight wireless communication system and method
US20220070868A1 (en) * 2011-08-17 2022-03-03 Skyline Partners Technology Llc Backhaul radio with adaptive beamforming and sample alignment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020060643A1 (en) * 2000-09-21 2002-05-23 Helioss Communication Inc. Point to point communication system with parallel links
WO2003034639A1 (fr) * 2001-10-12 2003-04-24 Nokia Corporation Systeme radio micro-onde adaptatif point a point
WO2004025978A1 (fr) * 2002-09-13 2004-03-25 Telefonaktiebolaget L M Ericsson (Publ) Mecanisme d'optimisation destine a la reutilisation de frequence
US20220070868A1 (en) * 2011-08-17 2022-03-03 Skyline Partners Technology Llc Backhaul radio with adaptive beamforming and sample alignment
US9325409B1 (en) * 2012-04-12 2016-04-26 Tarana Wireless, Inc. Non-line of sight wireless communication system and method

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