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WO2018065025A1 - Gestion de liaison descendante supplémentaire dynamique - Google Patents

Gestion de liaison descendante supplémentaire dynamique Download PDF

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Publication number
WO2018065025A1
WO2018065025A1 PCT/EP2016/073542 EP2016073542W WO2018065025A1 WO 2018065025 A1 WO2018065025 A1 WO 2018065025A1 EP 2016073542 W EP2016073542 W EP 2016073542W WO 2018065025 A1 WO2018065025 A1 WO 2018065025A1
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WIPO (PCT)
Prior art keywords
transceiver station
cells
transceiver
transceiver stations
stations
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PCT/EP2016/073542
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English (en)
Inventor
Sergio Barberis
Enrico Buracchini
Paolo Goria
Michele Ludovico
Alessandro Trogolo
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TIM SpA
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Telecom Italia SpA
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Priority to PCT/EP2016/073542 priority Critical patent/WO2018065025A1/fr
Publication of WO2018065025A1 publication Critical patent/WO2018065025A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections

Definitions

  • the present invention generally relates to wireless communication networks, such as radiomobile or cellular networks - e.g., 2G, 3G, 4G or LTE/LTE-Advanced, and, in view of new forthcoming technologies, 5G (and beyond) cellular networks. More particularly, the present invention relates to supplemental downlink management for cellular networks.
  • Cellular networks ⁇ e.g., 2G, 3G, LTE/LTE-Advanced and the forthcoming 5G cellular networks) allow data traffic (also referred to as traffic load) to be high-speed conveyed between a fixed- location transceiver base station (or node) radiating radio waves over a respective land area (cell) and user equipments ⁇ e.g., user terminals, such as cellular phones) within the cell.
  • data traffic also referred to as traffic load
  • a fixed- location transceiver base station or node
  • user equipments e.g., user terminals, such as cellular phones
  • Carrier Aggregation allows concurrent use of several (currently, up to five) carriers (referred to as “component carriers”) to provide an aggregated band having a larger bandwidth ⁇ e.g., up to 100 MHz) in order to meet "International Mobile Telecommunications-Advanced" (IMT-Advanced) requirements for high peak data rates, while maintaining backward compatibility with Release-8 and 9 LTE.
  • component carriers may be of different bandwidths supported by LTE
  • the aggregated band may be formed by contiguous component carriers belonging to a same operating frequency band (intra-band contiguous aggregation), by non-contiguous component carriers belonging to a same operating frequency band (intra-band non-contiguous aggregation), or by non-contiguous component carriers belonging to different operating frequency bands (inter-band non-contiguous aggregation).
  • the transmission/reception exploiting an aggregated band employs a set of different cells, namely a respective cell for each component carrier. This implies that different component carriers may also have very different coverage areas, as propagation conditions may vary greatly from one component carrier to another one (i.e., from one cell to another one).
  • the signaling traffic pertaining to an aggregated band is managed by only one cell - referred to as "primary cell” - among the corresponding set of cells; the component carrier corresponding to said primary cell is also referred to as "primary component carrier".
  • the other cells of the set - referred to as “secondary cells” - are configured to manage user data traffic only; the component carriers corresponding to the secondary cells are also referred to as “secondary component carriers”.
  • Carrier aggregation provides that the primary component carrier can be changed only during handover; conversely, secondary component carriers may be added and removed as required.
  • Carrier aggregation can be used for both Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
  • the downlink and the uplink can be configured in a complete independent way, provided that the number of component carriers used for the uplink is equal to or lower than the number of component carriers used for the downlink.
  • Carrier aggregation reduces the probability of having unused resources, improving thus the resource utilization efficiency.
  • Supplemental Downlink is a technique that can be considered as a special case of High Speed Packet Access (HSPA) multi-carrier and LTE carrier aggregation techniques.
  • SDL is used for enhancing downlink capacity by employing unpaired spectrum (i.e., a spectrum that is allocated in the same block for uplink and downlink) as additional carriers to be aggregated along with carriers originally intended for the downlink.
  • unpaired spectrum i.e., a spectrum that is allocated in the same block for uplink and downlink
  • additional carriers also referred to as supplemental carriers - are component carriers that belong to an operating frequency band that is different than the one of the original carriers.
  • the RAN4 specification group has defined so far two operating frequency bands dedicated to SDL: the operating frequency band 29 - 717-728 MHz frequency range-, and the operating frequency band 32 - 1452-1496 MHz frequency range - (also referred to as "L-band”).
  • RAN4 defined also possible carrier aggregation configurations for SDL using the above-mentioned operating frequency bands 29, 32 in conjunction with specific primary bands of HSPA and LTE.
  • carrier aggregation configurations for L-band available today involve 800 MHz band (operating frequency band 20) for LTE and 2100 MHz band (operating frequency band 1) for UMTS/HSDPA.
  • LTE the carrier aggregation configurations of the carriers between L-band and 1800 MHz band (operating frequency band 3) and the carrier aggregation configuration among three carriers with L-band, operating frequency band 20, and operating frequency band 3.
  • CA/CB reliable carrier aggregation/channel bonding
  • WO 2012109195 discloses a method and apparatus for operating supplementary cells in licensed exempt (LE) spectrum.
  • An aggregating cell operating in a frequency division duplex (FDD) licensed spectrum is aggregated with a LE supplementary cell operating in a time sharing mode for uplink (UL) and downlink (DL) operations.
  • the LE supplementary cell may be an FDD supplementary cell dynamically configurable between an UL only mode, a DL only mode, and a shared mode, to match requested UL and DL traffic ratios.
  • the LE supplementary cell may be a time division duplex (TDD) supplementary cell.
  • the TDD supplementary cell may be dynamically configurable between multiple TDD configurations.
  • a coexistence capability for coordinating operations between the LE supplementary cell with other systems operating in the same channel is provided. Coexistence gaps are provided to measure primary/secondary user usage and permit other systems operating in the LE supplementary cell channel to access the channel.
  • US 20150063151 discloses systems and methods for managing communication in an unlicensed band of frequencies to supplement communication in a licensed band of frequencies in unlicensed spectrum.
  • the management may comprise, for example, monitoring utilization of resources currently available to a first Radio Access Technology (RAT) via at least one of a Primary Cell (PCell) operating in the licensed band, a set of one or more Secondary Cells (SCells) operating in the unlicensed band, or a combination thereof.
  • RAT Radio Access Technology
  • SCell Primary Cell
  • SCells Secondary Cells
  • a first SCell among the set of SCells may be configured or de-configured with respect to operation in the unlicensed band.
  • Sensing mechanisms are adopted for managing resource utilization in the unlicensed band, very similar to LBT (Listen
  • radio technology For example, currently employed SDL carrier aggregation for L-band involves using the 800 MHz band for LTE radio technology only and 2100 MHz band for UMTS/HSDPA radio technology only.
  • the Applicant has tackled the problem of devising a simple and effective solution aimed at improving the SDL resources allocation to increase the network efficiency.
  • the proposed solution is based on the idea that SDL resources may be advantageously shared in a dynamic way also among transceiver stations which operate according to different radio technologies.
  • An aspect of the present invention relates to a cellular network.
  • the cellular network comprises a plurality of first transceiver stations configured to operate according to a first radio technology.
  • Each first transceiver station is configured to provide radio coverage to a corresponding set of first cells to allow user equipments within the first cells of the corresponding set to exchange traffic with said first transceiver station.
  • the cellular network further comprises a plurality of second transceiver stations configured to operate according to a second radio technology different from the first radio technology.
  • Each second transceiver station is configured to provide radio coverage to a corresponding set of second cells to allow user equipments within the second cells of the corresponding set to exchange traffic with said second transceiver station.
  • the cellular network further comprises a resource assignment module adapted to set a band configuration for the first and second transceiver stations.
  • Said band configuration provides for each first transceiver station the assignment of a first set of component carriers to selected first cells among the corresponding set of first cells.
  • Said band configuration further provides for each second transceiver station the assignment of a second set of component carriers to selected second cells among the corresponding set of second cells.
  • Said resource assignment module is further configured to collect from said first cells and from said second cells corresponding cell status information.
  • Said resource assignment module is further configured to reconfigure the band configuration.
  • the reconfiguration of the band configuration provides for assigning:
  • At least one requesting transceiver station different from the at least one donor transceiver station, and selected among the plurality of first transceiver stations and the plurality of second transceiver stations,
  • said at least one donor transceiver station comprises a first transceiver station and said at least one requesting transceiver station comprises a second transceiver station.
  • said at least one donor transceiver station comprises a second transceiver station and said at least one requesting transceiver station comprises a first transceiver station.
  • said cell status information comprises at least one among:
  • the resource assignment module is further configured to identify, based on the collected cell status, a first group of transceiver stations comprising first and/or second transceiver stations being assigned with a set of component carriers providing a bandwidth higher than a minimum bandwidth required to serve the corresponding set of served cells.
  • said at least one donor transceiver station is selected among the first or second transceiver station belonging to the first group.
  • the resource assignment module is further configured to identify, based on the collected cell status, a second group of transceiver stations comprising first and/or second transceiver stations being assigned with a set of component carriers providing a bandwidth lower than a minimum bandwidth required to serve the corresponding set of served cells.
  • said at least one requesting transceiver station is selected among the first or second transceiver station belonging to the second group.
  • said at least one donor transceiver station is selected among the first or second transceiver station belonging to the first group.
  • said at least one requesting transceiver station is selected among the first or second transceiver station belonging to the second group.
  • said at least one component carrier at least a portion whereof is assigned by the resource assignment module for reconfiguring the band configuration belongs to operating frequency bands dedicated to supplemental downlink.
  • said operating frequency bands comprise at least one among:
  • said first radio technology is the 3GPP LTE/LTE-Advanced radio technology
  • said second radio technology is the UMTS/HSDPA radio technology
  • the cellular network is arranged according to a centralized self-organizing network functionality, and comprises a centralized node configured to implement the main cellular network functions.
  • said resource assignment module is located at said centralized node.
  • said first transceiver stations and said second transceiver stations are designed to be reconfigurable in terms of hardware and radio resources in such a way to support different radio communication systems and operate on different frequency bands.
  • Another aspect of the present invention relates to a method for operating a cellular network.
  • the cellular network comprises a plurality of first transceiver stations configured to operate according to a first radio technology.
  • Each first transceiver station is configured to provide radio coverage to a corresponding set of first cells to allow user equipments within the first cells of the corresponding set to exchange traffic with said first transceiver station.
  • the cellular network further comprises a plurality of second transceiver stations configured to operate according to a second radio technology different from the first radio technology.
  • Each second transceiver station is configured to provide radio coverage to a corresponding set of second cells to allow user equipments within the second cells of the corresponding set to exchange traffic with said second transceiver station.
  • the method comprises setting a band configuration for the first and second transceiver stations.
  • Said band configuration provides for each first transceiver station the assignment of a first set of component carriers to selected first cells among the corresponding set of first cells and provides for each second transceiver station the assignment of a second set of component carriers to selected second cells among the corresponding set of second cells.
  • the method further comprises collecting from said first cells and from said second cells corresponding cell status information.
  • the method further comprises reconfiguring the band configuration.
  • said reconfiguring the band configuration comprises assigning:
  • At least one requesting transceiver station different from the at least one donor transceiver station, and selected among the plurality of first transceiver stations and the plurality of second transceiver stations, based on the collected cell status information.
  • said at least one donor transceiver station comprises a first transceiver station and said at least one requesting transceiver station comprises a second transceiver station.
  • said at least one donor transceiver station comprises a second transceiver station and said at least one requesting transceiver station comprises a first transceiver station.
  • said cell status information comprises at least one among:
  • the method further comprises identifying, based on the collected cell status, a first group of transceiver stations comprising first and/or second transceiver stations being assigned with a set of component carriers providing a bandwidth higher than a minimum bandwidth required to serve the corresponding set of served cells.
  • said at least one donor transceiver station is selected among the first or second transceiver stations belonging to the first group.
  • the method further comprises identifying, based on the collected cell status, a second group of transceiver stations comprising first and/or second transceiver stations being assigned with a set of component carriers providing a bandwidth lower than a minimum bandwidth required to serve the corresponding set of served cells.
  • said at least one requesting transceiver station is selected among the first or second transceiver station belonging to the second group.
  • said at least one component carrier at least a portion whereof is assigned for reconfiguring the band configuration belong to operating frequency bands dedicated to supplemental downlink.
  • Figure 1 schematically shows a portion of a cellular network wherein the present invention may be applied
  • Figure 2 is a flow chart illustrating in terms of functional blocks the main operations carried out by an SDL module of the cellular network of Figure 1 according to an embodiment of the present invention
  • Figures 3A and 3B illustrate exemplary configurations of the cellular network of Figure 1 during the execution of the operations of the flow chart of Figure 2.
  • a portion of a cellular network 100 is schematically shown in Figure 1.
  • the cellular network 100 is compliant with both the 3GPP LTE/LTE-Advanced radio technology and the UMTS/HSDPA radio technology.
  • the cellular network 100 comprises a plurality of first transceiver stations 110 (e.g., eNodeB) configured to operate according to the 3GPP LTE/LTE- Advanced radio technology, and a plurality of second transceiver stations 120 (e.g., NodeB) configured to operate according to the UMTS/HSDPA radio technology.
  • first transceiver stations 110 e.g., eNodeB
  • second transceiver stations 120 e.g., NodeB
  • cells 125(i) corresponding to the first transceiver station 110 are depicted in the figures as non-overlapped to cells 135 j) corresponding to the second transceiver station 120, with the first transceiver station 110 that is depicted as substantially spaced apart from the second transceiver station 120, in order to provide a substantial complete radio coverage of a specific area under both the 3 GPP LTE/LTE-Advanced radio technology and the UMTS/HSDPA radio technology, cells 125(i) corresponding to the first transceiver station 110 are generally at least overlapped to cells 135 j) corresponding to the second transceiver station 120.
  • the generic user equipment 130 is allowed to establish communication with both the first transceiver station 110 (according to the 3 GPP LTE/LTE-Advanced radio technology) and the second transceiver station 120 (according to the UMTS/HSDPA radio technology).
  • the first and second transceiver stations 110, 120 are of the re-configurable type, i.e., capable of being reconfigured in terms of hardware and radio resources, supporting different radio technologies and able to operate on different operating frequency bands.
  • the generic first transceiver station 110 is configured to support Carrier Aggregation to concurrently use a set of different component carriers CC(i) (each one corresponding to a respective cell 125(i) among the corresponding set of cells 125(i) pertaining to such transceiver station 110) in order to being able of exploiting a wider aggregated band.
  • the generic second transceiver station 120 is configured to support Carrier Aggregation to concurrently use a set of different component carriers CC'(j) (each one corresponding to a respective cell 135(j) among the corresponding set of cells 135 j) pertaining to such transceiver station 120) in order to being able of exploiting a wider aggregated band.
  • the second transceiver stations 120 are managed by radio resource controller nodes, referred to as Radio Network Controller (RNC) nodes 140 (only one depicted in figure).
  • RNC Radio Network Controller
  • Each RNC node 140 comprises a Radio Resource Management (RRM) module 145 configured to manage requests and assignments of radio channels by/to user equipments 130 within the cells 135 j).
  • RRM Radio Resource Management
  • the requests and assignments of radio channels by/to user equipments 130 within the the cells 125(i) are instead managed by further RRM modules 150 directly located at the first transceiver stations 110.
  • the operation of the first and second transceiver stations 110, 120 is monitored and managed by Network Element Managers, i.e., management network entities of the cellular network 100, such as for example Operation, Administration and Management systems, or OAM systems 180 (conceptually depicted as a single block as shown in Figure 1).
  • Network Element Managers i.e., management network entities of the cellular network 100, such as for example Operation, Administration and Management systems, or OAM systems 180 (conceptually depicted as a single block as shown in Figure 1).
  • the OAM system 180 comprises an Operations Support System, or OSS 182 that comprises (preferably, although not limitatively, software) entities configured for automatically managing the operation of the first and second transceiver stations 110, 120.
  • OSS 182 comprises (preferably, although not limitatively, software) entities configured for automatically managing the operation of the first and second transceiver stations 110, 120.
  • the cellular network 100 is organized with a so-called Centralized Self- Organizing Network functionality, or C-SON.
  • the cellular network functions ⁇ e.g., implemented as algorithms) are preferably implemented and executed in a centralized network entity, such as for example a centralized node 185.
  • the centralized node 185 is operatively connected to the OAM system 180 through an appropriate interface; e.g., the centralized node 185 may be connected to OAM system 180 by means of a so called Northbound interface module, or N-interface 190.
  • 'node', 'system' or 'module' are herein intended to comprise, but not limited to, hardware, firmware, a combination of hardware and software, or software.
  • a node, system or module may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computing device (e.g., user equipment 130, transceiver stations 110, 120, as well as other radio network elements).
  • a computing device e.g., user equipment 130, transceiver stations 110, 120, as well as other radio network elements.
  • a node, system or module may comprise an application being executed on a computing device and/or the computing device itself.
  • One or more nodes, systems or modules may be localized on one computing device and/or distributed between two or more computing devices.
  • Nodes, systems or modules may comprise and/or interact with computer readable media having stored data according to various data structures.
  • the nodes, systems or modules may communicate by exploiting local and/or remote processes, preferably by means of electrical, electromagnetic and/or optical signals providing one or more data packets, such as data packets from one node, system or module interacting with another node, system or module in a local system, in a distributed system, and/or across a radio network and/or a wired network.
  • a SDL module 195 is provided, for example at the centralized node 185, configured to implement an SDL procedure for enhancing downlink capacity for both the first transceiver stations 110 and the second transceiver stations 120 of the cellular network 100.
  • the SDL module 195 is designed to cooperate with the R M modules 145 coupled with the second transceiver stations 120 and configured to manage requests and assignments of radio resources by/to user equipments 130 within the cells 135 j), as well as to cooperate with the further RRM modules 150 located at the first transceiver stations 110 and configured to manage requests and assignments of radio resources by/to user equipments 130 within the the cells 125(i).
  • the SDL module 195 is associated with a group of transceiver stations comprising at least one first transceiver station 110 and one second transceiver station 120 serving cells 125(i) and 135 j) respectively.
  • the SDL module 195 is configured to collect cell status information from cells corresponding to such group of transceiver stations associated therewith, and to accordingly manage in a dynamic way the assignment (and/or reconfiguration) of SDL resources to (and/or among) the cells based on said collected cell status information, and the corresponding base band processing resources.
  • SDL resources it is meant a set of supplemental carriers available for acting as additional carriers to be aggregated along with carriers originally intended for the downlink to the purpose of enhancing the downlink capacity thereof.
  • Figure 2 is a flow chart 200 illustrating in terms of functional blocks the main operations carried out by the SDL module 195 according to an embodiment of the present invention.
  • the SDL module 195 is designed to configure the SDL resources assignment according to an initial band configuration (block 210) - which may be directly set by the network operator (network manager) based on network planning parameters.
  • the initial band configuration provides for assigning all the SDL resources to a first transceiver station 110.
  • the initial band configuration provides for a first band Bl that is assigned to a first transceiver station 110 and a second band B2 that is assigned to a second transceiver station 120 in the following way:
  • the first band Bl is set to be an aggregated band comprising a primary component carrier CC(1) corresponding to a first operating frequency band (such as for example the 800 MHz operating frequency band 20) and assigned to the primary cell 125(1) of the first transceiver station 110, and a secondary component carrier CC(2) corresponding to a second operating frequency band (such as for example the 1452-1496 MHz operating frequency band 32) and assigned to a secondary cell 125(2) of the first transceiver station 110 to be operated as a supplemental carrier;
  • the second band B2 is set to comprise a single component carrier CC'(l) corresponding to a third operating frequency band (such as for example the 2100 MHz operating frequency band I) which is assigned to the primary cell 135(1) of the second transceiver station 120.
  • the SDL resources are comprised of the secondary component carrier CC(2) only.
  • the downlink capacity of the first transceiver station 110 is enhanced thanks to the aggregated unpaired spectrum given by the secondary component carrier CC(2) corresponding to the second operating frequency band, which is used as a supplemental carrier.
  • the RRM module 150 of the first transceiver station 110 may assign the secondary component carrier CC(2) as a supplemental carrier to those user equipments 130 which are within the coverage of both the primary cell 125(1) and the secondary cell 125(2), while user equipments 130 within the coverage of the primary cell 125(1) only cannot take advantage of this feature.
  • user equipment 130 which are served by the second transceiver station 120 cannot avail of SDL resources.
  • the SDL module 195 is further configured to store the collected cell status information in a memorization unit, such as a memorization unit located at the centralized node 185 or distributed among the cellular network 100.
  • the SDL module 195 is configured to carry out a transceiver station classification procedure directed to classify the transceiver stations 110, 120 according to their current need of bandwidth, as well as the availability of SDL resources by exploiting the abovementioned collected cell status information (block 225).
  • transceiver station classification procedure provides for identifying, based on collected cell status information, a first group of transceiver stations 110, 120 comprising transceiver stations 110, 120 being assigned with a set of component carriers providing a bandwidth higher than a minimum bandwidth required to serve the corresponding set of served cells 125(i), 135(j).
  • Such classification procedure further provides for identifying, based on the collected cell status, a second group of transceiver stations 110, 120 comprising first and/or second transceiver stations 110, 120 being assigned with a set of component carriers providing a bandwidth lower than a minimum bandwidth required to serve the corresponding set of served cells 125(i), 135 j).
  • the transceiver station classification procedure provides for carrying out, for each transceiver station 110, 120 of the group of transceiver stations managed by the SDL module 195, the following classifications.
  • a transceiver station 110, 120 of the group of transceiver stations managed by the SDL module 195 is inserted in the first classification list CL1 if the current band configuration provides for assigning thereto a bandwidth sufficiently higher than the minimum one required to effectively serve the cells thereof, while it is inserted in the second classification list CL2 if the current band configuration provides for assigning thereto a bandwidth that is lower than the minimum one required to effectively serve the cells thereof.
  • the transceiver stations 110, 120 listed in the second classification list CL2 are classified as "requesting" transceiver stations which require more bandwidth to effectively serve the cells thereof, while the transceiver stations 110, 120 listed in the first classification list CL1 (i.e., identified as belonging to the first group) are classified as potential "donor" transceiver stations, which can potentially offer a portion of the band assigned thereto to the transceiver stations 110, 120, listed in the second classification list CL2.
  • the SDL module 195 is configured to check (block 230) if the actual band configuration can be reconfigured to optimize the operation of the transceiver stations 110, 120 of the group of transceiver stations managed by the SDL module 195.
  • this check is made by inspecting the two classification lists CL1, CL2 in order to assess whether portion(s) of the bandwidth of the band assigned to one or more of the transceiver stations 110,
  • the SDL module 195 assessed that a bandwidth re-assignment can be potentially carried out between a (set of) transceiver station(s) 110, 120 listed in the first classification list CL1 and a (set of) transceiver station(s) 110, 120 listed in the second classification list CL2, it additionally verifies whether the base band processing resources of the transceiver station(s) 110, 120 involved in the reassignment are sufficient to address the potential new reconfiguration.
  • the SDL module 195 has assessed that the actual band configuration does not require to be changed (e.g., because the second classification list CL2 is empty), or cannot be changed (e.g., because of there is a too scarce amount of bandwidth available from the transceiver station(s) 110, 120 listed in the first classification list CL1, and/or because the base band processing resources of the transceiver station(s) 110, 120 involved in the potential reassignment are insufficient), the actual band configuration is maintained (exit branch N of block 230), and the SDL module 195 resumes the collection for each cell 125(i) and 135 j) of each first and second transceiver stations 110, 120 of the group to collect the abovementioned cell status information (return to block 220).
  • the SDL module 195 In case the SDL module 195 has assessed that the actual band configuration should be changed, and the reconfiguration is feasible (exit branch Y of block 230), the SDL module 195 actually reconfigures the actual band configuration by using at least a portion of the supplemental carrier(s) previously assigned to transceiver station(s) 110, 120 listed in the first classification list CL1 as supplemental carrier(s) to be assigned to transceiver station(s) 110, 120 listed in the second classification list CL2 (block 240).
  • the reconfiguration provides that the SDL module 195 generates a set of reconfiguration protocol messages indicative of the new band configuration and sends such protocol messages to the transceiver stations 110, 120 of the group involved in the reconfiguration.
  • An example of such protocol messages is disclosed in US8559964. It has to be noted that the content of such messages can vary according to the involved radio technologies and bands on which they operate, as well as the system architecture and network deployment.
  • portion UP of the supplemental carrier i.e., a portion of the secondary component carrier CC(2) which is not used for serving user equipments 130 within the secondary cell 125(2) of the first transceiver station 110 (i.e., if the first transceiver station 110 is listed in the first classification band CL1)
  • portion UP may be potentially aggregated to the band B2 of the second transceiver station 120 if said second transceiver station 120 requires more resources to better serve its cells 135(j) (i.e., if the second transceiver station 120 is listed in the second classification band CL2).
  • the band configuration illustrated in Figure 3A may be reconfigured in order to provide the second transceiver station 120 with an aggregated band comprising the primary component carrier CC'(l) corresponding to the third operating frequency band and assigned to the primary cell 135(1) of the second transceiver station 120, and comprising a secondary component carrier CC'(2) corresponding to such unused portion UP of the secondary component carrier CC(2) and assigned to a secondary cell 135(2) of the second transceiver station 120 to be operated as a further supplemental carrier.
  • This situation is illustrated in Figure 3B.
  • the resulting bandwidth of the supplemental carrier used by the secondary cell 125(2) of the first transceiver station 110 is reduced to enhance the downlink capacity of the second transceiver station 120 by forming a supplemental carrier for a secondary cell 135(2) of the second transceiver station 120.
  • a supplemental carrier assigned to the second transceiver station 120 e.g., the secondary component carrier CC'(2)
  • CC'(2) the secondary component carrier
  • the supplemental carrier corresponding to an operating frequency band may be dynamically shared among transceiver stations configured to operate according to different radio technology (such as for example the 3 GPP LTE/LTE-Advanced radio technology and the UMTS/HSDPA radio technology), thus exploiting in a very efficient way the SDL capabilities.
  • different radio technology such as for example the 3 GPP LTE/LTE-Advanced radio technology and the UMTS/HSDPA radio technology
  • the solution according to an embodiment of the invention lends itself to be implemented through an equivalent method (by using similar steps, removing some steps being not essential, or adding further optional steps); moreover, the steps may be performed in different order, concurrently or in an interleaved way (at least partly).
  • any component thereof may be separated into several elements, or two or more components may be combined into a single element; in addition, each component may be replicated for supporting the execution of the corresponding operations in parallel. It should also be noted that any interaction between different components generally does not need to be continuous (unless otherwise indicated), and it may be both direct and indirect through one or more intermediaries.
  • the concepts of the present invention may be also applied to a cellular network organized with a so-called Distributed Self-Organizing Network functionality.
  • the SDL module may be arranged in a distributed way among the cellular network nodes (e.g., at the transceiver stations).
  • the concepts of the present invention can be applied as well to any band/or radio access and/or duplexing scheme (e.g., FDD, TDD, or also the emerging Full Duplex one).
  • the concept of the present invention can be also applied to unlicensed spectrum such as WLAN bands and/or LTE-U and/or License Assisted Access (LAA) bands.
  • WLAN bands and/or LTE-U and/or License Assisted Access (LAA) bands.
  • LAA License Assisted Access
  • Alternative embodiments of the present invention may provide for allowing high degree of flexibility in managing and reconfiguring radio resources and related parameters by exploiting BB pooling based on Centralized or Cloud RAN (C-RAN) or Virtual RAN (V-RAN) architectures.
  • C-RAN Centralized or Cloud RAN
  • V-RAN Virtual RAN
  • the transceiver stations can be identified as a set of hardware BB resources connected one-to-one or multiplexed towards one or more Radio Remote Heads (RRH) via dedicated or multiplexed front- hauling solutions.
  • RRH Radio Remote Heads
  • the SDL module may reside as a logical entity/feature in a SON node and/or functionalities, that may be both centralized or even distributed as D-SON feature(s).
  • the SDL module may interact with C-RAN entity/nodes, embedding e.g., also RRM features/functionalities.
  • V-RAN in a more general case of network virtualization, all functionalities and features described above can reside in a single set of nodes, e.g., based on general purpose processors resident in one or more servers/data centers.
  • the above mentioned V-RAN, SON, SDL, RRM protocols and radio functionalities can be logical (i.e., software) entities and BB HW resources can be realized as virtual instantiations over general purpose processors units.

Landscapes

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

Abstract

L'invention concerne un réseau cellulaire (100). Le réseau cellulaire comprend une pluralité de premières stations émettrices-réceptrices (110) configurées pour fonctionner selon une première technologie radio. Chaque première station émettrice-réceptrice est configurée pour fournir une couverture radio à un ensemble correspondant de premières cellules (125 (i)) pour permettre à des équipements utilisateur (130) à l'intérieur des premières cellules de l'ensemble correspondant d'échanger un trafic avec ladite première station émettrice-réceptrice. Le réseau cellulaire comprend une pluralité de secondes stations émettrices-réceptrices (120) configurées pour fonctionner selon une seconde technologie radio différente de la première technologie radio. Chaque seconde station émettrice-réceptrice est configurée pour fournir une couverture radio à un ensemble correspondant de secondes cellules (135 (j)) pour permettre à des équipements utilisateurs (130) à l'intérieur des secondes cellules de l'ensemble correspondant d'échanger un trafic avec ladite seconde station émettrice-réceptrice. Le réseau cellulaire comprend un module d'attribution de ressources (195) conçu pour établir une configuration de bande pour les première et seconde stations émettrices-réceptrices. Ladite configuration de bande fournit pour chaque première station émettrice-réceptrice l'attribution d'un premier ensemble de porteuses composantes à des premières cellules sélectionnées parmi l'ensemble correspondant de premières cellules et fournit pour chaque seconde station émettrice-réceptrice l'attribution d'un second ensemble de porteuses composantes à des secondes cellules sélectionnées parmi l'ensemble correspondant de secondes cellules. Ledit module d'attribution de ressources est en outre configuré pour collecter à partir desdites premières cellules et desdites secondes cellules des informations d'état de cellule correspondantes, et reconfigurer la configuration de bande par attribution d'au moins une partie d'au moins une porteuse composante préalablement attribuée à au moins une station émettrice-réceptrice donneuse sélectionnée parmi la pluralité de premières stations émettrices-réceptrices et la pluralité de secondes stations émettrices-réceptrices, à au moins une station émettrice-réceptrice requérante différente de ladite au moins une station émettrice-réceptrice donneuse, et sélectionnée parmi la pluralité de premières stations émettrices-réceptrices et la pluralité de secondes stations émettrices-réceptrices, sur la base des informations d'état de cellule collectées.
PCT/EP2016/073542 2016-10-03 2016-10-03 Gestion de liaison descendante supplémentaire dynamique Ceased WO2018065025A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008088254A1 (fr) * 2007-01-15 2008-07-24 Telefonaktiebolaget Lm Ericsson (Publ) Affectation dynamique des bandes fréquences entre réseaux de radiocommunication
WO2011134099A1 (fr) * 2010-04-26 2011-11-03 Nokia Siemens Networks Oy Réaffectation dynamique des fréquences
WO2013163335A1 (fr) * 2012-04-24 2013-10-31 Apple Inc. Procédés et appareil d'attribution de ressources radio de façon opportuniste dans des systèmes de communication à multiples porteuses
EP2858400A1 (fr) * 2012-06-05 2015-04-08 Sony Corporation Contrôleur de communication, station de base, équipement terminal et procédé de commande de communication

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008088254A1 (fr) * 2007-01-15 2008-07-24 Telefonaktiebolaget Lm Ericsson (Publ) Affectation dynamique des bandes fréquences entre réseaux de radiocommunication
WO2011134099A1 (fr) * 2010-04-26 2011-11-03 Nokia Siemens Networks Oy Réaffectation dynamique des fréquences
WO2013163335A1 (fr) * 2012-04-24 2013-10-31 Apple Inc. Procédés et appareil d'attribution de ressources radio de façon opportuniste dans des systèmes de communication à multiples porteuses
EP2858400A1 (fr) * 2012-06-05 2015-04-08 Sony Corporation Contrôleur de communication, station de base, équipement terminal et procédé de commande de communication

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEC: "Remaining aspects of possible new TDD configurations", vol. TSG RAN, no. Phoenix, USA; 20150914 - 20150916, 8 September 2015 (2015-09-08), XP050999847, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN/Docs/> [retrieved on 20150908] *

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