Classifications

• • C—CHEMISTRY; METALLURGY
  • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
  • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
  • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
  • C12N15/09—Recombinant DNA-technology
  • C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
  • C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
  • C12N15/80—Vectors or expression systems specially adapted for eukaryotic hosts for fungi
  • C12N15/81—Vectors or expression systems specially adapted for eukaryotic hosts for fungi for yeasts
  • C12N15/815—Vectors or expression systems specially adapted for eukaryotic hosts for fungi for yeasts for yeasts other than Saccharomyces
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
  • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
  • H04W16/10—Dynamic resource partitioning
• • C—CHEMISTRY; METALLURGY
  • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
  • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
  • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
  • C12N15/09—Recombinant DNA-technology
  • C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
  • C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
  • C12N15/80—Vectors or expression systems specially adapted for eukaryotic hosts for fungi
  • C12N15/81—Vectors or expression systems specially adapted for eukaryotic hosts for fungi for yeasts
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W28/00—Network traffic management; Network resource management
  • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
  • H04W28/18—Negotiating wireless communication parameters
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W72/00—Local resource management
  • H04W72/04—Wireless resource allocation
  • H04W72/044—Wireless resource allocation based on the type of the allocated resource
  • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W72/00—Local resource management
  • H04W72/50—Allocation or scheduling criteria for wireless resources
  • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W92/00—Interfaces specially adapted for wireless communication networks
  • H04W92/04—Interfaces between hierarchically different network devices
  • H04W92/045—Interfaces between hierarchically different network devices between access point and backbone network device
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W92/00—Interfaces specially adapted for wireless communication networks
  • H04W92/04—Interfaces between hierarchically different network devices
  • H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers

Definitions

• the present invention relates to a method for managing a wireless telecommunication network.
• Telecommunication operators develop their network management in order to ensure high quality of service and high data rates to their end users.
• small cells networks are increasingly used since such small cells - i.e. cells of a size generally comprise between 100 or 200 m - are interesting for delivering high per-user data rates, uniformly across a coverage area, while providing greater overall throughput via higher spatial reuse.
• a small cells network can be operated in both an indoor and an outdoor environment which allows, for instance, a continuity of service between an indoor area and an outdoor area.
• a neighboring cell being a cell which is adjacent or proximate to the considered cell.
• a neighboring cell list is set by each cell in order to identify different neighboring cells that can be seen (captured or received) by the terminal and responding to a set of predefined criteria (mainly the level of received signal), a communication handover being possible for a terminal communication from the cell owning the list to a cell listed thereon.
• NCL neighbor cell list
• the invention results from the finding that the small cells are supported by base stations whose backhauling connection to the core communication network - i.e. the wired connection between the radio base station and the telecommunication network - should be taken into account for shar- ing the communication resources sharing among the different small cells.
• the invention results from the finding that the quality of a base station backhauling should be considered in the distribution of the telecommunication network resources, for instance to establish NCLs or distribute radio frequencies between base stations.
• a small cell base station can be connected with different types of backhauling, for instance depending on the base station location, to the core network, such as an optical fiber connection, a Digital Subscriber Line connection, a power transmission line and/or a cooper line, each one of said connection having its own particularities to be considered in order to improve the telecommunication network operations.
• the core network such as an optical fiber connection, a Digital Subscriber Line connection, a power transmission line and/or a cooper line, each one of said connection having its own particularities to be considered in order to improve the telecommunication network operations.
• the invention relates to a method for managing cells of a telecommunication network, said cells being supported by radio base stations aimed to provide wireless communication support to mobile terminals connected to said communication network, each radio base station being linked to a core of the telecommunication network through an associate backhaul, characterized in that it comprises the step of managing dynamically communications resources of the telecommunication base stations by considering a dynamical backhaul quality parameter for each base station and comparing different backhaul quality parameters of different base stations in order to optimize the communication resources operations of the telecommunication network.
• a telecommunication network can be managed in order to consider the backhaul operating conditions, so that the overall telecommunication network operation can be optimized.
• FIG. 1 is a schematic view of a telecommunication network according to the invention
• FIGS. 2 and 3 are diagrams of an assessment of a base station assessment according to one embodiment of the invention.
• FIG. 4 is a table of an assessment of a base station assessment according to one embodiment of the invention.
• FIG. 5 is a diagram representing a possible distribution of fre- quency distribution among different interfering base stations.
• FIG. 6 depicts a graphical distribution of resources in a telecommunication network according to the invention.
• the invention relates to a method for managing small cells 10Oi of a telecommunication network 102, each small cell 10Oi being supported by a radio base station 104i aimed to provide wireless/radio communication support to mobile terminals 106i connected to said telecommunication network 102.
• Each small cell covers an area which does not extend further to 200 meters from the base station, typically no further to 1 00 meters, and each base station 104i is linked to a core 106 of the telecommunication network 102 through an associate backhauling wired connection 105i whose nature might vary from one base station to another.
• a backhaul might use a connection based on an optical fiber, a digital subscriber line, a cooper line or a power transmission line.
• the telecommunication network comprises means to manage dynamically communication resources of the telecommunication base stations by considering a dynamic backhauling quality BQ parameter for each base station and comparing different BQ parameters of different base stations in order to optimize the communication resources op- erations of the telecommunication network.
• the communications resources are managed when setting a neighboring cell list (NCL) for each base station so that said NCL setting takes into account the dynamic BQ parameter of the neighboring cells considered into said list.
• NCL neighboring cell list
• the base stations 104i are deployed to connect user terminals 106i to a wireless network.
• Each user terminal is initially connected to a base station when it is located with in the cell area served by the base station . Nevertheless, due to mobility or when the base station experiences congestion, the user terminal communication is handed off to a different base station which is selected from the Neighboring Cell List (NCL).
• NCL Neighboring Cell List
• the NCL identifies the different cells declared by the terminal as valid (according to preset criteria such as the minimum received power) whereto a handover is possible from the cell owning the l ist to the cell listed.
• the backhaul 105i of a base station 104i might be more limited or congested as compared to other another base station 104j backhauling 105j in similar conditions.
• the handover of telecommunication should consider the availability and the occupancy of the neighboring cells backhauls to be optimized.
• a user terminal should select a base station by taking into account important parameters such as:
• each mobile terminal 106 might take select a base station by considering the above mentioned three parameters through a score S which depends on:
• SQ as the signal power.
• SQ parameter could be considered as per-interval function wherein SQ equals:
• said MB parameter could be considered through a membership function of the available bandwidth as depicted in Figure 2.
• the available band- width could be qualified as low, medium or high depending on the requirement of the service searched by the terminal. For instance, for real time traffic, a minimum bandwidth depending on the requested resolution is required [Please explain; for instance, video conference imposes a minimum of data bandwidth ?] whereas, for example, a high bandwidth is required to ensure a high quality for a CIF format.
• the delay D could be qualified as low, medium or high depending on the requirement of the service and through some thresholds (D1 .D4). For instance, the delay is not a stringent requirement for a http traffic so that its service could be performed through the low, the medium or the high region.
• the "quality of service parameter" is an indicator which varies according to the service required by the terminal. For instance, considering two users requiring, for one, a web service (http) and, for the other, a real time traffic, it is known that the http traffic tolerate a large delay so that, even when a base station backhauling is congested, the terminal should be connected to the cell offering the best radio connectivity while the terminal requiring real time traffic (e.g. mobile TV), which is delay dependent, should be connected to a cell having a non congested backhaul.
• http web service
• real time traffic e.g. mobile TV
• the score S is assigned to each cell, for instance through a table as represented in figure 4 relating to the MB and BQ parameters, and it is upon its values that the ranking of the neighbor cells list is realized so that the terminal tends to select the cell having the higher score number.
• the indicator function After computing the score of the different received cells (declared eli- gible by comparing their received signals to the defined thresholds, the indicator function), it selects the cell having a score different from 0.
• the backhaul quality parameter is required for the distribution of resources between different base stations independently of the neighboring cell list establishment.
• the telecommunication network resources should first be allocated and shared between the different small cells and this issue appears to be more critical in the case of a small cells network where the number of interfering cells is high (due to high density and low coverage area).
• the two base station BS1 104i and BS2 104j of figure 1 respectively connected to the backhauls Bh 1 105i and Bh2 105j, they may operate in the same band and interfere (low separating distance).
• each base station 1 04i and 104j se- lects its radio resources in the way that the overall generated interference is minimized, as depicted for instance in figure 5.
• a part of the total available frequency band is allocated to a given cell .
• the resource allocation procedure is performed on the basis of:
• the resource allocation procedure of the prior art takes into account only the wireless link characteristics. Nevertheless, this method can be proved to be weak in the case of heterogeneous/various backhaul connection of each involved base station.
• a given conventional resource allocation procedure can be applied at a time t and will continue for a duration T, resulting in a first average data rate DR1 for the base station BS1 104i and an average data rate DR2 for the base station BS2 104j.
• the effective average data rate of the base station BS1 104i to be considered is DR_Bh1 .
• the different base stations determine the backhaul characteristics either with a probing based on TCP principle (to fix the bandwidth) or by operator configurations.
• One way to sent backhaul information occupancy is to use the common channels to the users.
• the invention discloses the consideration of a back- haul quality (BQ) parameter in combination with other parameters, such as a typical delay parameter, in order to optimize the distribution of communication resources within a telecommunication network.
• BQ back- haul quality
• the invention can be implemented through an unlimited number of embodiments and functions. For instance, by coupling the two parameters, a terminal could select an appropriate target cell offering a quality of service adapted to said parameter while a load equilibrium between the cells could be achieved in the communication network.
• the invention can also be implemented according to different embodiments regardless of the network topology and type (macro, femto cells %) despite the fact that the description focus on the example of small cells network where the heterogeneity of backhaul is most explicit.

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• 2010
  • 2010-06-17 EP EP10166410A patent/EP2398293A1/en not_active Withdrawn
• 2011
  • 2011-05-09 JP JP2013514610A patent/JP5926249B2/ja not_active Expired - Fee Related
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