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38 results about "Spectrum availability" patented technology
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Method and system for determining spectrum availability within a network
InactiveUS7564816B2Shorten the overall cycleHigh transmission powerTransmission monitoringWireless commuication servicesSpectrum availabilityFrequency spectrum
Owner:SHARED SPECTRUM
Cooperative cognitive radio spectrum sensing using a hybrid data-decision method
ActiveUS20150181436A1Radio transmissionTransmission monitoringSpectrum availabilityFrequency spectrum
A spectrum sensing method for cognitive radio to detect spectrum holes in an environment of bandwidth scarcity. The method comprises first receiving a wireless signal at a cognitive radio user, and then discovering the frequency edges of allocated frequency bands by using wavelet transform coefficients to detect discontinuities in the power spectral density of the received signal. After determining the allocated frequency bands, the method determines frequency band availability by detecting the in band energy using a bi-threshold energy detector, where the energy detector makes hard decisions and soft decisions. Finally, a fusion center combines hard and soft decisions collected from a cooperative spectrum sensing network of cognitive radio users and makes a final decision using a hybrid of data fusion and decision fusion to determine the final decision regarding spectrum availability.
Owner:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
System and method for determining and sharing spectrum availability
A method and apparatus for determining and sharing RF spectrum availability. The method includes automatically sensing and analyzing a spectrum to identify used and / or unused portions of the spectrum, and automatically communicating the used and / or unused portions of the spectrum to a spectrum owner or a spectrum user. The invention has particular use in automatically identifying and quantifying current spectrum users, automatically reporting the current spectrum users to a spectrum owner, and / or allocating unused spectrum portions to users.
Owner:INTELLIGENT SPECTRUM SHARING LLC
Tone based congnitive radio for opportunistic communications
ActiveUS20080311938A1Network topologiesConnection managementSpectrum availabilityMedia access control
Within both the licensed and unlicensed wireless spectrum, benefits are obtained in allowing devices to form and communicate based upon opportunistic spectrum availability. At present such ad-hoc networks are established using either directly existing Media Access Control protocols or proposing modifications to them. According to the invention, there is provided a method for allowing abstract wireless links, i.e., arbitrary cooperation among a set of proximite wireless nodes, to be established between devices in a fast and efficient manner. Beneficially the approach allows multi-standard cognitive radios to operate in ad-hoc environments and non-ad-hoc environments. Accordingly a wireless module monitors a plurality of sensing tones and polling tones, each pair of sensing and polling tones associated with a transmission channel. A wireless module determines a vacant transmission channel by the absence of both a sensing tone and its associated polling tone. An abstract wireless link could be established by the wireless module transmitting the polling tone associated with the vacant transmission channel and detecting from second other wireless modules the sensing tone associated with the vacant transmission channel.
Owner:SENNET COMM
Method and system for determining spectrum availability within a network
InactiveUS20070263566A1Shorten the overall cycleHigh transmission powerRadio/inductive link selection arrangementsTransmission monitoringSpectrum availabilityFrequency spectrum
A method and transceiver for determining spectrum availability within a give area is disclosed. The given area includes cells in a grid. A belief evaluator receives a measurement from a signal and assigns an instantaneous belief indicator, an instantaneous disbelief indicator and an instantaneous ignorance indicator based on a detection threshold and the power level of the measurement. The indicators quantify the probability of a presence of a transmitter within the grid cell. A belief accumulator uses the instantaneous indicators along with accumulated belief, disbelief and ignorance indicators from previous measurements to determine cumulative belief, disbelief and ignorance indicators. The accumulated belief, disbelief and ignorance indicators are the results of previous measurements and belief / disbelief / ignorance determinations for the grid cell. An allocator indicates the status of the grid cell and whether a spectrum is available. If a spectrum is available, then the grid cell is added to other available cells within the area to generate the spectrum hole.
Owner:SHARED SPECTRUM
Spectrum sensing-based single-path service partitioning-merging optical network frequency allocation method
ActiveCN104836751AMaximize remaining transfer capacityReduce usageWavelength-division multiplex systemsData switching networksSpectrum availabilityFrequency spectrum
The invention relates to a spectrum sensing-based single-path service partitioning-merging spectrum allocation method in an elastic optical network. An algorithm consists of two parts, when a new service arrives, a spectrum availability-based service-divisible spectrum allocation method is used to allocate spectrum resources for the service, n spectrum blocks with the largest total residual frequency availability of links of a path that the service passes in occupation are selected to transmit the service, the residual spectrum availability of the links is maximized as much as possible, and the blocking rate of a network is reduced; and when an old service leaves, bandwidth resources are released, a spectrum availability-based service merging method is used, whether idle spectrum blocks large enough to satisfy a bandwidth requirement of service merging exist in the path that services under transmission in a partitioned manner pass is inquired, and spectrum availability of links is not reduced after merging, and if the bandwidth requirement is satisfied, the services are merged. The spectrum sensing-based single-path service partitioning-merging spectrum allocation method aims to reduce spectrum resource waste caused by service splitting and too much use of an equipment port, further reduce the blocking rate of the network, and save energy consumption of the equipment port.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
System and method for handsets and access points power saving
InactiveUS20110090829A1Save energyImprove performancePower managementEnergy efficient ICTSpectrum availabilityFrequency spectrum
There is provided a system and a method for a GSM operated handset or access point to turn power on and off and change transmit / receive parameters via GSM device and network. A GSM device is always on while other wireless devices maybe kept power off or in inactive mode. GSM device will turn on / off other devices and instruct them to change transmit and receive parameters according to services availability and radio resource usage policies. Database sever / severs will be equipped for both GSM device and GSM network so that GSM device can aware the services availability and spectrum availability for other devices such as HSPA, 1xEVDo, WiFi, LTE, WiMax, ATSC, DVB-T, DVB-H, etc. A GSM device may turn multiple devices on and enables multiple networks to communicate with a GSM operated handset.
Owner:WU JANE ZHEN
Systems and methods for determining and specifying spectrum availability for a predetermined travel route
ActiveUS20150105116A1Instruments for road network navigationRadio transmissionSpectrum availabilityFrequency spectrum
A spectrum management server generates and an electronic device uses a channel map solution for a predetermined travel route of the electronic device. The channel map solution includes at least one available channel for each of the plural geographic areas through which the planned travel route passes. At least two adjacent ones of the geographic areas have different channel availability.
Owner:QUALCOMM INC
Implementing a dynamic cloud spectrum database as a mechanism for cataloging and controlling spectrum availability
InactiveUS20140256284A1Efficient and scalable DSA schemeMinimal costAccounting/billing servicesNetwork traffic/resource managementSpectrum availabilityFrequency spectrum
A system and method are provided for implementing a dynamic cloud spectrum database to codify and store information on, and track the use of, spectrum resources made available by primary spectrum holders in an effort to facilitate spectrum management for networks using spectrum allocated through a Dynamic Spectrum Access scheme that allows the primary spectrum holders, or proxies assigned to manage a given allocations of spectrum, to temporarily “rent” access to the spectrum they hold to other entities. Spectrum may be listed in the database defined by a common unit measurement system according to a defined metric for quantifying spectrum. A time-frequency unit or TFU is defined according to a unit of spectrum being available for a specified time, e.g., 1 MHz of spectrum being available for use for 1 second at a given location. Spectrum resources negotiated in the disclosed transactions are represented and / or transferred in multiples of TFU's.
Owner:TAHOE RES LTD
An OFDMA system frequency deviation estimating method based on the sub-carrier interleaving allocation
InactiveCN101056295AReduce computational complexityAvoid Estimating Performance ImpactMulti-frequency code systemsOrthogonal multiplexSpectrum availabilityFrequency spectrum
The invention discloses a sub-channel blind frequency deviation estimation method based on power spectrum stack with high frequency spectrum availability ratio, it does not need regularly synchronization in advance, which aims at problems of timing synchronization and frequency deviation estimate isolation and low availability ratio of frequency spectrum in present OFDMA system uplink blind frequency deviation estimation method. The invention utilizes characteristics of same carrier frequency deviation of same user on each sub-carrier and final circulation prefix, carries out appropriate extraction to the auto-correlation function, carries out the power spectrum stack with sub-carriers of same user, thereby makes the availability of frequency spectrum higher, estimation complexity is reduced and is more accurate.
Owner:XI AN JIAOTONG UNIV
Spectrum Aware Rate Selection Procedure for Optical Channels in Flexible WDM Networks
A spectrum-aware rate selection includes finding a set of channels based on spectrum availability information such that the total required spectrum for a requested data rate of a traffic demand is minimized.
Owner:NEC CORP
Implementation method of pilot-assisted detector for DVB-T signals in cognitive radio network
InactiveCN101741487AEnhanced Periodic Persistent Pilot ComponentIncrease weightTransmission monitoringSpectrum availabilityFrequency spectrum
The invention relates to an implementation method of a pilot-assisted detector for DVB-T signals in a cognitive radio network. Most countries in the world use DVB-T as the signal standard for ground digital televisions, the nodes in a cognitive radio network acquire spectra-available information on the wave band of the digital television signals mainly by means of spectra perception, and therefore, the research into spectra perception methods for DVB-T signals has significant value. The invention provides a pilot-assisted detector for DVB-T signals. Firstly, a processing unit in the detector strengthens the periodic pilot components in a DVB-T signal received by a secondary user through the sum of product movements but inhibits other components; and secondly, a combination and judgment unit in the detector combines the outputs of the processing unit and judges whether a master user signal exists. The theoretical analysis and the simulation result indicate that the detector is free from the effects of multidiameter Rayleigh fading, can differentiate the master user signal from interference under the conditions of no synchronizing information and low signal-to-noise ratio, and enhances the detection performance.
Owner:XI AN JIAOTONG UNIV
Path protection method based on spectrum availability and protection bandwidth sharing sensing in elastic optical network
ActiveCN106712839AReduce blocking rateShort durationElectromagnetic transmissionData switching networksSpectrum availabilityFrequency spectrum
The invention belongs to the technical field of optical fiber communication, and relates to a path protection method based on spectrum availability and protection bandwidth sharing sensing in an elastic optical network. The method comprises a single-path transmission stage and a multi-path transmission stage. The single-path transmission stage comprises the following steps: firstly, reducing spectrum fragment durations by distinguishing business durations and through different spectrum distribution modes; and secondly, optimizing a protection link cost function according to different sizes of shared spectrum blocks, so that the protection bandwidth sharing degree can be increased. The multi-path transmission stage comprises the following steps: according to different business protection bandwidth requirements, adopting different multi-path transmission strategies in a self-adaptive manner to minimize the number of consumed frequency slots; and introducing a shared path protection mechanism into multi-path protection to reduce the usage of idle frequency slots. Finally, following dynamic establishment and removal of light paths in the network, spectrum allocation for a business protection path may not be carried out based on the maximum sharing degree. Through a protection bandwidth reconfiguration strategy, the protection width sharing degree can be increased, and the spectrum allocation for the protection path can be optimized.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Flow rate distribution method and device of cognitive wireless self-organizing network multipath routing
InactiveCN102970714AImprove efficiencyImprove transmission efficiencyNetwork traffic/resource managementSpectrum availabilityFrequency spectrum
The invention discloses a flow rate distribution method and device of cognitive wireless self-organizing network multipath routing so as to reduce the influences of dynamic variation of data traffic arrival rate and node service speed rate on end-to-end service quality in the cognitive wireless self-organizing network. The method comprises the following steps of: the path number between a source end secondary user and a target end secondary user of end-to-end data transmission by adopting a multipath routing algorithm is obtained; the source end secondary user collects the service speed rate and spectrum availability ratio of each hot node, and generates a path list of the multipath routing according to the service speed rate, the spectrum availability ratio and a multipath routing protocol of each hop node on each path; and the traffic distribution optimal issue is converted into the convex optimization problem for solving a lagrangian multiplier and the traffic of each path distributed to the path list through a lagrange method, and transmission is carried out by adopting optimization speed rate on each path in the path list according to iteration solved results by a reduced gradient method. The embodiment of the invention improves the end-to-end transmission performance and efficiency.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Routing spectrum allocation method and device suitable for elastic optical network
ActiveCN111865800AAvoid congestionIncrease profitMultiplex system selection arrangementsData switching networksSpectrum availabilityResource utilization
The invention discloses a routing spectrum allocation method and device suitable for an elastic optical network. The method comprises the steps of: obtaining a service parameter after receiving a routing spectrum allocation request of a service; according to the service parameters, calculating n paths with minimum influence factors by utilizing an optical layer load balancing algorithm; traversingthe n paths, and for the ith path, allocating an available spectrum to the route by using a maximum path spectrum isolation algorithm based on the service parameters; calculating the whole-network spectrum availability corresponding to the paths according to the routing spectrum allocation result of the ith path, and storing a mapping relationship with the corresponding routing spectrum allocation result; and selecting one path with the highest whole-network spectrum availability from the n paths as an optimal path, and returning the corresponding routing spectrum allocation result. The influence of routing allocation and spectrum allocation on network resources is comprehensively considered, spectrum fragments are reduced, the blocking rate is reduced, the spectrum resource utilization rate is increased, and the resource utilization rate is effectively increased.
Owner:FENGHUO COMM SCI & TECH CO LTD
Method and system for mobility measurements in new radio (NR) based mobile communication network
ActiveUS20200344694A1Save power consumptionPower managementSpatial transmit diversitySpectrum availabilityComputer network
A method for performing mobility-measurements in new radio (NR) based 3GPP mobile communication network is provided. The method includes receiving network information with respect to a geographical area from one or more user equipments (UEs) operating in geographical area for a predefined duration of time. The received network information is classified at various time-instants during the predefined duration of time as at least one of an NR spectrum availability and NR spectrum non-availability. An overall probability of availability of the NR spectrum within the area is calculated for a time-instant subsequent to the predefined duration of time based on the classified network information. The UE is enabled for scheduling NR measurements within the area based on the calculated probability.
Owner:SAMSUNG ELECTRONICS CO LTD
Dwelling channel selection method for solving deaf problem of cognitive radio wireless network
InactiveCN101895893AAssess restrictionNetwork planningChannel state informationSpectrum availability
The invention discloses a dwelling channel selection method for solving the deaf problem of a cognitive radio wireless network and belongs to the technical field of cognitive radio wireless electric networks. The method mainly comprises that: according to a sensed spectrum hole and the intercepted dwelling channel selection information of neighboring nodes, each node selects an available channel, which is not collided with the dwelling channels of the neighboring nodes within a two-hop range by using a distributed method, as a dwelling channel for performing control information interaction and service channel negotiation with other nodes; and when the dwelling channels of the nodes within the two-hop range collide due to the appearance of a main user, the movement of a node or the like, a dwelling channel selection process is restarted to select a new dwelling channel. The method can effectively improve the route reconstruction condition caused by communication interruption and deaf problem resulting from the dynamic change of the availability of frequency spectra in the cognitive radio wireless networks. The method is suitable to be used in the cognitive radio wireless networks, distributed multi-hop networks, wireless local networks, next-generation heterogeneous network and other places.
Owner:CHONGQING TELECOMMUNICATION INSTITUTE
System and method for determining and sharing spectrum availability
A method and apparatus for determining and sharing RF spectrum availability. The method includes automatically sensing and analyzing a spectrum to identify used and / or unused portions of the spectrum, and automatically communicating the used and / or unused portions of the spectrum to a spectrum owner or a spectrum user. The invention has particular use in automatically identifying and quantifying current spectrum users, automatically reporting the current spectrum users to a spectrum owner, and / or allocating unused spectrum portions to users.
Owner:INTELLIGENT SPECTRUM SHARING LLC
Spectrum defragmentation trigger method based on spectrum sensing in elastic optical network
ActiveCN108616783ASave time allocatedReduce blocking rateMultiplex system selection arrangementsSpectrum availabilityFrequency spectrum
Owner:NANJING UNIV OF POSTS & TELECOMM
Implementation method of pilot-assisted detector for DVB-T signals in cognitive radio network
InactiveCN101741487BEnhanced Periodic Persistent Pilot ComponentIncrease weightTransmission monitoringSpectrum availabilityFrequency spectrum
The invention relates to an implementation method of a pilot-assisted detector for DVB-T signals in a cognitive radio network. Most countries in the world use DVB-T as the signal standard for ground digital televisions, the nodes in a cognitive radio network acquire spectra-available information on the wave band of the digital television signals mainly by means of spectra perception, and therefore, the research into spectra perception methods for DVB-T signals has significant value. The invention provides a pilot-assisted detector for DVB-T signals. Firstly, a processing unit in the detector strengthens the periodic pilot components in a DVB-T signal received by a secondary user through the sum of product movements but inhibits other components; and secondly, a combination and judgment unit in the detector combines the outputs of the processing unit and judges whether a master user signal exists. The theoretical analysis and the simulation result indicate that the detector is free from the effects of multidiameter Rayleigh fading, can differentiate the master user signal from interference under the conditions of no synchronizing information and low signal-to-noise ratio, and enhances the detection performance.
Owner:XI AN JIAOTONG UNIV
Cooperative cognitive radio spectrum sensing using a hybrid data-decision method
A spectrum sensing method for cognitive radio to detect spectrum holes in an environment of bandwidth scarcity. The method comprises first receiving a wireless signal at a cognitive radio user, and then discovering the frequency edges of allocated frequency bands by using wavelet transform coefficients to detect discontinuities in the power spectral density of the received signal. After determining the allocated frequency bands, the method determines frequency band availability by detecting the in band energy using a bi-threshold energy detector, where the energy detector makes hard decisions and soft decisions. Finally, a fusion center combines hard and soft decisions collected from a cooperative spectrum sensing network of cognitive radio users and makes a final decision using a hybrid of data fusion and decision fusion to determine the final decision regarding spectrum availability.
Owner:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
A traffic distribution method and device for multi-path routing in a cognitive wireless ad hoc network
InactiveCN102970714BImprove efficiencyImprove transmission efficiencyNetwork traffic/resource managementSpectrum availabilityFrequency spectrum
The invention discloses a flow rate distribution method and device of cognitive wireless self-organizing network multipath routing so as to reduce the influences of dynamic variation of data traffic arrival rate and node service speed rate on end-to-end service quality in the cognitive wireless self-organizing network. The method comprises the following steps of: the path number between a source end secondary user and a target end secondary user of end-to-end data transmission by adopting a multipath routing algorithm is obtained; the source end secondary user collects the service speed rate and spectrum availability ratio of each hot node, and generates a path list of the multipath routing according to the service speed rate, the spectrum availability ratio and a multipath routing protocol of each hop node on each path; and the traffic distribution optimal issue is converted into the convex optimization problem for solving a lagrangian multiplier and the traffic of each path distributed to the path list through a lagrange method, and transmission is carried out by adopting optimization speed rate on each path in the path list according to iteration solved results by a reduced gradient method. The embodiment of the invention improves the end-to-end transmission performance and efficiency.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Tone based cognitive radio for opportunistic communications
Owner:SENNET COMM
Interference Avoidance Method for User Links of Satellite Communication System Based on Spectrum Map
ActiveCN109600190BFunctionalImprove spectrum resource utilizationRadio transmissionTransmission monitoringSpectrum availabilityInterference (communication)
The method for avoiding user link interference of a satellite communication system based on a frequency spectrum map disclosed by the invention aims to solve the problem of reliable communication of a satellite mobile communication system in a complex electromagnetic environment. It is realized through the following technical solutions: the method adopts five links of data acquisition and preprocessing, spectrum map construction and distribution, spectrum availability prediction, interference avoidance decision generation, and satellite-ground joint spectrum resource allocation. User terminals and satellites jointly acquire satellites. The spectrum map information of the user link of the mobile communication system, and report the information to the gateway station; the gateway station establishes a regional spectrum map and distributes it to the network management center, and the network management center builds a complete spectrum map of the satellite mobile communication system; the network management center uses frequent The pattern mining algorithm predicts the availability of the spectrum, and sends the generated interference avoidance strategy to the gateway station; the gateway station generates resource allocation instructions, and satellites and user terminals reconfigure parameters according to the allocation instructions to complete system interference avoidance.
Owner:10TH RES INST OF CETC
Method and system for mobility measurements in new radio (NR) based mobile communication network
ActiveUS11317352B2Save power consumptionPower managementSpatial transmit diversitySpectrum availabilityComputer network
Owner:SAMSUNG ELECTRONICS CO LTD
Spectrum allocation method based on spectrum resource prime number division in elastic optical network
ActiveCN112637709AReduce fragmentationReduce processing burdenMultiplex system selection arrangementsSpectrum availabilityComputer network
The invention provides a spectrum allocation method based on spectrum resource prime number division in an elastic optical network, which comprises the following steps: dividing spectrum resources on each link in the network into K types of prime number blocks, wherein the number of frequency pieces contained in different types of prime number blocks is different; when the number of the frequency chips required by one connection request is integer multiples of a certain prime number block in the K types, distributing the prime number blocks of the corresponding types; otherwise, adding one frequency sheet to the number of frequency sheets required by the connection request to enable the number of frequency sheets to be integral multiples of a certain prime number block in the K types, and then distributing the prime number blocks of the corresponding types. According to the method, the spectrum resources are divided into the prime number blocks, so that the spectrum resources on different links are arranged more orderly, multiple types of connection requests are allowed to share one type of prime number blocks, the types of prime number blocks needing to be divided are reduced, and finally, the effects of increasing spectrum availability and reducing the blocking rate of the connection requests are achieved.
Owner:ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
Network device, terminal, and method for determining communication spectrum availability
ActiveCN106576247BAvoid interferenceTransmission monitoringNetwork planningSpectrum availabilityTransceiver
The present invention relates to the field of wireless communication technologies, and in particular to a network device, a terminal, and a method for determining the availability of a communication spectrum, so as to solve the problem that when a network device does not effectively sense another network device and uses its communication spectrum to communicate with a terminal, There may be a problem with interference from another network device. The network device provided by the embodiment of the present invention includes: a transceiver module, configured to send control information to the target terminal, and notify the target terminal to measure the first spectrum, and for the network device, the first spectrum is an unlicensed spectrum; and receive the measurement reported by the target terminal Feedback information obtained from the first frequency spectrum; a processing module configured to determine whether the first frequency spectrum is available according to the feedback information received by the transceiver module. Since the terminal measures the unlicensed first spectrum, it can be more accurately judged whether other network devices are using the unlicensed first spectrum, so as to effectively avoid interference from other network devices.
Owner:HUAWEI TECH CO LTD
Spectrum allocation method and system
ActiveCN107682134AReduce complexityReduce generationInter user/terminal allocationTransmission rate adaptationSpectrum availabilityFrequency spectrum
The invention provides a spectrum allocation method and system. The spectrum allocation method comprises the steps of: based on a source node and sink nodes of services, constructing a small-particle-size service group; constructing a continuous spectrum plane for the small-particle-size service group; and according to the continuous spectrum plane, allocating spectrum resources. According to theinvention, the small-particle-size service group is constructed by carrying out classification on the services, the services with path similarity are partitioned into the same group to be subjected touniform routing and spectrum allocation so as to reduce complexity of service bearing, and continuous spectrum allocation is carried out on the basis of the small-particle-size service group so as toeffectively reduce generation of spectrum fragments and improve spectrum availability of an elastic optical network.
Owner:GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +3
An OFDMA system frequency deviation estimating method based on the sub-carrier interleaving allocation
InactiveCN100562000CReduce computational complexityAvoid Estimating Performance ImpactMulti-frequency code systemsOrthogonal multiplexSpectrum availabilityFrequency spectrum
The invention discloses a sub-channel blind frequency deviation estimation method based on power spectrum stack with high frequency spectrum availability ratio, it does not need regularly synchronization in advance, which aims at problems of timing synchronization and frequency deviation estimate isolation and low availability ratio of frequency spectrum in present OFDMA system uplink blind frequency deviation estimation method. The invention utilizes characteristics of same carrier frequency deviation of same user on each sub-carrier and final circulation prefix, carries out appropriate extraction to the auto-correlation function, carries out the power spectrum stack with sub-carriers of same user, thereby makes the availability of frequency spectrum higher, estimation complexity is reduced and is more accurate.
Owner:XI AN JIAOTONG UNIV
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