WO2011052643A1 - 無線通信システム、無線通信方法、無線局、およびプログラム - Google Patents
無線通信システム、無線通信方法、無線局、およびプログラム Download PDFInfo
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- WO2011052643A1 WO2011052643A1 PCT/JP2010/069080 JP2010069080W WO2011052643A1 WO 2011052643 A1 WO2011052643 A1 WO 2011052643A1 JP 2010069080 W JP2010069080 W JP 2010069080W WO 2011052643 A1 WO2011052643 A1 WO 2011052643A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
- H04L5/0035—Resource allocation in a cooperative multipoint environment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0062—Avoidance of ingress interference, e.g. ham radio channels
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- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
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- H04W36/00692—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink using simultaneous multiple data streams, e.g. cooperative multipoint [CoMP], carrier aggregation [CA] or multiple input multiple output [MIMO]
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- H04W92/16—Interfaces between hierarchically similar devices
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Definitions
- the present invention relates to a communication system, and more particularly to a radio communication system suitable for application to a radio communication system having a radio terminal and a plurality of radio stations and having a function of performing data transmission / reception using a plurality of carriers simultaneously.
- the present invention relates to a method, a radio station, and a program.
- LTE Long Term Evolution
- WCDMA Wideband Code Division Multiple Access
- eNB evolved NodeB
- Non-Patent Document 1 Non-Patent Document 1
- OI uplink interference overload information
- PRB Physical Resource Block
- LTE-Advanced is standardized as a cellular system with enhanced functionality of LTE.
- One of the functions of LTE-Advanced is to use multiple component carriers (CC) simultaneously for one UE as a function to improve the peak data rate for each radio terminal (UE: User Equipment).
- CC component carriers
- UE User Equipment
- CA carrier aggregation
- the configuration carrier (CC) is a basic frequency block necessary for realizing communication between a radio base station and a radio terminal in LTE.
- one transport block (data transfer unit from the MAC (Media Access Control) layer to the PHY (Physical) layer) is transmitted / received by one component carrier (CC), and signal processing is performed.
- CC component carrier
- Each component carrier (CC) is performed independently.
- each constituent carrier is one LTE carrier, whereas a UE having an LTE-Advanced function (LTE-Advanced terminal) uses the entire collected bandwidth.
- Information such as whether to use carrier aggregation and which constituent carriers are bundled is provided as individual control information or system information to UEs having an LTE-Advanced function.
- multi-carrier transmission by OFDM Orthogonal Frequency Division Multiplexing
- CA carrier aggregation
- BC Backward compatible carrier
- NBC Non-backward compatible carrier
- EC extension carriers
- BC is a CC that can be accessed by both UEs having only LTE functions and UEs having LTE-Advanced functions.
- NBC is a CC that cannot be accessed by LTE UEs that do not have LTE-Advanced functions, but that can be accessed only by UEs that have LTE-Advanced functions.
- the EC can be used only by LTE-Advanced UEs like NBC, and is always used as a part of a plurality of constituent carriers (CC) that perform carrier aggregation (CA) (cannot be used in standalone). It is a certain carrier.
- CC constituent carriers
- CA carrier aggregation
- CA carrier aggregation
- BC and NBC and / or EC are carrier-aggregated (CA)
- CA carrier-aggregated
- PCI Physical Cell ID
- ECGI EUTRAN (Evolved ⁇ It has been studied that UMTS Terrestrial Radio Access Network (Cell Global ID) and NBC and EC (or only EC) do not have individual cell IDs.
- the reason why the BC has an individual cell ID, not NBC or EC, is to enable LTE UEs that do not perform carrier aggregation (CA) to access the BC.
- CA carrier aggregation
- the NBC or EC does not have an individual cell ID (for example, PCI) and the cell ID (PCI) of the aggregated BC is assigned as a temporary (pseudo) cell ID.
- a plurality of constituent carriers (CC) to be subjected to carrier aggregation (CA) are collectively regarded as one cell, and UEs are managed in association with one cell ID, as in the case of not performing carrier aggregation (CA). It is considered effective from the viewpoint of being able to.
- 3GPP TS36.423v860 (Internet ⁇ URL> http: www.3gpp.org/ftp/Specs/html-info/36423.htm)
- 3GPP TR36.814v100 (Internet ⁇ URL> http: www.3gpp.org/ftp/Specs/html-info/36814.html)
- 3GPP TS36.331v860 (Internet ⁇ URL> http: www.3gpp.org/ftp/Specs/html-info/36331.html)
- CC constituent carriers
- BC Backward compatible carrier
- BC and NBC Non-backward compatible carrier
- NBC and EC Extension
- carrier carrier
- eNB radio base station
- NBC and EC do not have individual cell IDs for additional NBC and EC load information to be subjected to carrier aggregation (CA), and these load information are associated with cell IDs. Cannot be exchanged between eNBs. Even when NBC or EC uses the individual cell ID of BC as a provisional (pseudo) cell ID, load information cannot be associated with the information of multiple carriers using the same (pseudo) cell ID. Cannot be exchanged between.
- CA carrier aggregation
- a method for compensating for information on the missing NBC or EC by estimating the load information in NBC or EC from the load information in BC can be considered (analysis by the present inventor). This method will be discussed below.
- FIG. 24 (a) it is assumed that there are radio base stations eNB1 and eNB2, and BC, NBC, and EC are aggregated one by one.
- the horizontal axis is frequency
- the CA set of eNB1 (constituting carrier group for carrier aggregation) is composed of BC1, NBC1, and EC1 (CA set @ eNB1)
- the CA set of eNB2 is composed of BC2, NBC2, and EC2 ( CA set @ eNB2).
- the number of a plurality of constituent carriers aggregated in one CA set is not limited to “3”.
- eNB1 and eNB2 exchange overload indicators (OI; overload information) as load information in each other's BC, but do not exchange OI in each other's NBC and EC.
- OI overload information
- eNB1 estimates NBC2 of eNB2 and OI of EC2 from BC2 of eNB2.
- a method for estimating the NBC2 of eNB2 and the OI of EC2 from BC2 of eNB2 (A) A method of diverting the OI in BC2 as it is, (B) A method in which the OI in BC2 is averaged over all physical resource blocks (PRBs) to make it an OI of NBC2 and EC2. Can be considered.
- PRBs physical resource blocks
- the interference level for each physical resource block (PRB) is usually different for each component carrier (CC), so it cannot be said that it is useful information.
- CA set 1 of eNB1 is BC1, NBC1, EC1 (CA set1 @ eNB1), CA set 2 is EC1, NBC3, BC3 (CA set2 @ eNB1), CA set 1 of eNB2 is BC2, NBC2, EC2 (CA set1 @ eNB2 ), CA set 2 includes EC2, NBC4, and BC4 (CA set2 @ eNB2).
- the method of estimating the load information of NBC or EC based on the load information of BC for example, when eNB2 estimates the information of EC1 of eNB1 when the constituent carrier (CC) to be referred to is incorrect
- the information of BC1 of eNB1 it can easily be considered to be greatly different from the original load information of EC1.
- the estimated load information in this case is not useful information.
- the problem to be solved by the present invention is that it is possible to exchange information on the first carrier having the first identifier and the second carrier bundled in one carrier set between the radio stations. It is to realize a radio communication system, a method, a radio station, and a program that enable the same control as that of one carrier to be executed also in the second carrier. As a result of diligent research, we have invented a method for solving this problem, and will be presented below.
- predetermined information regarding at least one first carrier which is a carrier to which an individual first identifier is assigned, and a second carrier bundled in one carrier set, can be directly or indirectly transmitted.
- a wireless communication system for notifying a wireless station is provided.
- a carrier set in which a plurality of carriers having different frequencies is bundled is formed, the carrier set includes different types of carriers, and communication is performed using a plurality of carriers included in the carrier set at the same time.
- a wireless communication system in which one wireless station having a function notifies information of at least one type of carrier included in the carrier set to other wireless stations.
- a carrier set in which a plurality of carriers having different frequencies is bundled is formed, the carrier set includes different types of carriers, and communication is performed using a plurality of carriers included in the carrier set at the same time.
- a radio communication system in which one radio station having a function notifies other radio stations of carrier set information indicating a relationship between the carrier set and each carrier.
- one wireless station transmits predetermined information on at least one first carrier, which is a carrier to which an individual first identifier is assigned, and a second carrier bundled in one carrier set,
- a wireless communication method for notifying other wireless stations directly or indirectly is provided.
- predetermined information regarding at least one first carrier which is a carrier to which an individual first identifier is assigned, and a second carrier bundled in one carrier set, can be directly or indirectly transmitted.
- a wireless station for notifying a wireless station is provided.
- predetermined information regarding at least one first carrier which is a carrier to which an individual first identifier is assigned, and a second carrier bundled in one carrier set, can be directly or indirectly transmitted.
- a program for causing a computer constituting a wireless station to execute processing for notifying the wireless station is provided.
- a computer-readable recording medium recording the program is provided.
- the present invention it is possible to exchange information on a first carrier having an individual first identifier and a second carrier bundled in one carrier set between wireless stations, and the same as the first carrier
- the control can be executed also in the second carrier.
- a communication system has a function of performing data communication with a wireless terminal using a carrier set obtained by bundling (aggregating) a plurality of constituent carriers (CC: Component Carrier) having different frequencies.
- CC Component Carrier
- the wireless station has a carrier having no first identifier (“second carrier”).
- Information on NBC, EC) is communicated with other radio stations.
- the first carrier and the second carrier will be described as being classified into two types depending on whether the plurality of constituent carriers bundled in one carrier set has the first identifier.
- one carrier set may include at least one first carrier and at least one second carrier, and one carrier set includes only a plurality of carriers having a first identifier. It may be a form. It is obvious that the present invention can be applied to the second carrier even in a form in which the first identifier is assigned in common with the first carrier.
- the first carrier having the individual first identifier is associated with not having the individual first identifier, and the second carrier not having the individual first identifier is associated.
- Information for example, configuration information of the second carrier
- the load information and resource usage status of the second carrier that does not have the individual first identifier are also notified to other radio stations, and inter-cell interference is avoided and load distribution is performed using the load information and resource usage status. .
- the carrier set includes a plurality of carriers of different types (for example, BC, NBC, EC), and notifies the information of at least one type of carrier included in the carrier set to other radio stations. It is good.
- carrier set information indicating the relationship between the carrier set and each carrier is transmitted to other radio. You may make it notify to a station.
- load information and resource usage status in a second carrier that does not have an individual first identifier can be exchanged between wireless stations, and the second information can be exchanged using the load information and the resource usage status.
- 3GPP LTE Long Term Evolution
- cellular system a wireless communication system
- FIG. 1 is a diagram showing an example of a schematic configuration of a radio communication system of one form of the present invention.
- This radio communication system includes radio base stations (eNB: evolved NodeB) eNB1 and eNB2, and radio terminals (UE: User Equipment: user equipment) UE1.
- eNB evolved NodeB
- UE User Equipment: user equipment
- the carrier carriers (CA) capable of carrier aggregation (CA) include backward compatible carriers (BC), non-backward compatible carriers (NBC), and non-backward compatible carriers (NBC).
- BC backward compatible carriers
- NBC non-backward compatible carriers
- EC extension carriers
- ENB1 uses BC1, NBC1, and EC1, and eNB2 uses BC2, NBC2, and EC2 as one carrier set (CA set).
- CA set carrier set
- the number of the plurality of constituent carriers included in one CA set is not limited to “3”.
- UE1 has already completed connection establishment (RRC (Radio Resource Control) Connection) for communication with eNB1, and BC1, NBC1, and EC1 are already available.
- RRC Radio Resource Control
- the frequencies f1 to f3 may be continuous or discontinuous, and the frequency bands may be the same or different.
- BC is a first carrier having a first identifier
- NBC and EC are second carriers not having a first identifier. Even if NBC is the first carrier having the first identifier and only EC is the second carrier, the present invention is applicable.
- a physical (layer) cell ID PCI: Physical (Layer) Cell Identifier
- ECGI EUTRAN Cell Global Identifier
- eNB1 and eNB2 establish a link (communication connection) called X2 in a transmission path for exchanging information with each other, and various information exchange is possible through this.
- X2 link (communication connection)
- S1 which is a link with a high-order station (MME: Mobility Management Entity).
- MME Mobility Management Entity
- O & M Operaation and Maintenance server
- NM Network Manager
- FIG. 2 exemplifies a message type (Message Type) when information exchange is performed in X2.
- constituent carriers (CC) to be carrier-aggregated (CA) constituent carriers (CC) that do not have individual first identifiers and function as part of constituent carriers (CC) to be carrier-aggregated (CA) (second Carrier) composition information, -Load information (Load Information) in the constituent carrier (CC) (second carrier), -Resource usage status (Resource Status) Etc.
- the individual first identifier includes a physical (layer) cell ID (PCI), a global cell ID (ECGI), and the like.
- BC is considered as the first carrier
- NBC and EC are considered as the second carrier.
- the present invention is not limited to this, and NBC or EC may be the first carrier.
- the type of component carrier may be other than BC / NBC / EC.
- Load Information for example, -Overload information of uplink interference (Uplink Interference Overload Indication: OI), -Uplink High Interference Indication (HII), -Downlink transmission power information (relative narrowband Tx power: RNTP), There is.
- OI Uplink Interference Overload Indication
- HII Uplink High Interference Indication
- RNTP RNTP
- Uplink interference overload information is information indicating that the uplink interference is too large, and is notified for each radio resource of a predetermined unit called a physical resource block (PRB). Can be done.
- OI is ⁇ High interference
- -It is indicated by information such as low interference (Low interference).
- SINR signal-to-interference and noise ratio
- the uplink high interference information is information indicating whether or not it is sensitive to uplink interference (High Interference Sensitivity), and can be notified for each physical resource block (PRB) as in the case of OI.
- the eNB that has received this HII avoids, for example, allocating the physical resource block (PRB), which has been notified of being sensitive to interference, to the UE at the cell edge as much as possible, and reduces inter-cell interference.
- Uplink high interference information is, for example, -Is it sensitive to interference (High interference sensitivity)? -It is information indicated by whether it is not sensitive to interference (Low interference sensitivity). This is determined, for example, based on whether communication using (using) the PRB is sensitive to interference (resistant to interference). Or you may make it determine by the communication which uses the said PRB whether it is based on the radio
- the downlink transmission power information is information indicating whether the transmission power of the eNB for each physical resource block (PRB) is equal to or higher than a predetermined threshold.
- the eNB that has received this RNTP performs scheduling in consideration of the received RNTP.
- Resource Status for example, Radio resource usage status (Radio Resource Status), -Hardware load information (Hardware Load Indicator), -S1 network load information (S1 TNL Load Indicator), Etc.
- the radio resource usage status is the usage rate of each physical resource block (PRB) of radio resources of uplink (UL) and downlink (DL), and GBR (Quality of Service) with different QoS (Quality of Service) is different.
- PRB physical resource block
- GBR Quality of Service
- QoS Quality of Service
- Non-GBR Non-GBR
- Hardware load information indicates the usage rate of the hardware for each cell, and can be notified as stepwise information (for example, LowLoad, MediumLoad, HighLoad, Overload,).
- the hardware usage rate is determined, for example, by comparing the hardware usage amount (usage degree) with a plurality of predetermined threshold values set in advance.
- the hardware may be a part of a wireless base station or a part of a predetermined circuit (for example, a baseband unit) (shared between a plurality of wireless base stations).
- S1 TNL load information (S1 TNL Load Indicator) is S1 transport network layer load information, and can be notified as stepwise information (for example, LowLoad, MediumLoad, HighLoad, Overload,).
- S1 is a link (transmission path) established between the eNB and the MME (Mobility Management Entity) / S-GW (Serving Gateway).
- the S1 TNL load information is also determined, for example, by comparing the S1 TNL load with a plurality of predetermined threshold values set in advance.
- the S1 TNL load is, for example, the total amount (or average) of information communicated on the transmission line S1 in a predetermined period, the total amount (or average) of specific types of information communicated in S1 in a predetermined period, and the like. Used.
- a BC or NBC having a physical (layer) cell ID (individual cell ID) (PCI) and a global cell ID (ECGI) that can communicate independently can be referred to as a “cell”.
- PCI physical cell ID
- ECGI global cell ID
- the present invention can be applied even when these are called cells.
- this radio wireless communications system has the suitable structure based on the specification of 3GPP LTE, it is not limited to this. The above aspects are described below with reference to some exemplary embodiments.
- ⁇ Embodiment 1> 3 to 11 are diagrams for explaining the first exemplary embodiment of the present invention.
- the configuration information of the second carrier is exchanged between eNBs by an X2 connection establishment request (X2 SETUP REQUEST) and a response (X2 SETUP REQUEST).
- Message Type IE Information Element
- ⁇ Global eNB ID IE ⁇ Served Cells IE
- -GU Globally Unique Group Id List IE
- -Served cell information item (Served Cell Information IE)
- ⁇ Neighbor Information IE Is included.
- the served cell information is Physical (layer) cell ID: PCI, ⁇ Global cell ID: ECGI, -Tracking area code (TAC), Public Land Mobile Network Identity (Public Land Mobile Network Identity: PLMN (Public Ground Mobile Network) identifier), -FDD information (Frequency Division Duplex (Frequency Division Multiplexing Info)) and the like.
- PCI Physical (layer) cell ID
- ECGI Global cell ID
- TAC -Tracking area code
- PLMN Public Land Mobile Network Identity
- PLMN Public Ground Mobile Network
- -FDD information Frequency Division Duplex (Frequency Division Multiplexing Info)
- FDD Info As FDD information (FDD Info), -Uplink carrier frequency number (UL EARFCN (corresponding to the index of carrier frequency). Downlink carrier frequency number (DL EARFCN: corresponding to the carrier frequency index), -Uplink transmission bandwidth (UL Transmission Bandwidth), -DL transmission bandwidth (DL Transmission Bandwidth) There is.
- UL EARFCN corresponding to the index of carrier frequency
- DL EARFCN corresponding to the carrier frequency index
- UL Transmission Bandwidth UL Transmission Bandwidth
- DL transmission bandwidth DL Transmission Bandwidth
- the served carrier information (Served Carrier Information IE) indicating the information of the second carrier to be carrier-aggregated (CA) is also notified by X2 SETUP REQUEST as necessary.
- Served Carrier Information IE As an example of the Served Carrier Information IE, as shown in FIG. ⁇ Carrier ID ⁇ Serving PCI (Serving PCI), -FDD information (FDD Info), Etc. are included.
- the serving PCI is the PCI of the first carrier having the first identifier in the configuration carrier (CC) group (CA set) to be carrier aggregation (CA) to which the second carrier belongs.
- the PCI of the first carrier that represents one of them may be used, or the PCI of a plurality of or all of the first carriers may be used.
- the PCI of the first carrier of any one CA set may be used, or the PCI of each first carrier of the plurality or all of the CA sets may be used.
- the carrier ID is an individual number assigned to at least the second carrier.
- This carrier ID may be, for example, a bit sequence having a length equivalent to the physical (layer) cell ID (PCI) or global cell ID (ECGI) inherently possessed by the first carrier, or a simple bit shorter than those. It may be a series. Moreover, you may allocate for every CA set which each eNB manages, and you may allocate by the whole CA set.
- PCI physical (layer) cell ID
- ECGI global cell ID
- a frequency offset value with the frequency of the first carrier may be used instead of EARFCN.
- Carrier Information IE a serving cell ID (for example, ECGI) may be used instead of serving PCI, as shown in FIG.
- ECGI serving cell ID
- the configuration information of the second carrier can also be notified to the neighboring eNB (Neighboring eNB) in the same manner as the first carrier.
- PCI and ECGI are used as the first identifier of the first carrier, and the carrier ID is used as the second identifier of the second carrier.
- ECGI as the first identifier
- Carrier ID as the second identifier May be used.
- ECGI as the first identifier
- PCI may be used as the second identifier.
- the second carrier load information (Load Information) is also notified to the neighboring eNB.
- the load information IE is Message type (Message Type), ⁇ Cell ID, -Uplink interference overload information (UL Interference Overload Indication), -Uplink high interference information (UL High Interference Information), -Information such as narrowband transmission power information (relative narrowband Tx power) is included.
- the target carrier in addition to the target cell ID of the uplink interference information (UL High Information Information IE), the target carrier is included, and instead of the cell information item (Cell Information Item), a carrier information item (Carrier Information Item). ) Is added.
- Cell Information Item Cell Information Item
- Carrier Information Item Carrier Information Item
- Carrier Information Item The configuration of the carrier information item (Carrier Information Item) is almost the same as that of the cell information item (Cell Information Item), except that a carrier ID is used instead of the cell ID.
- the resource state (Resource Status) of the second carrier is similarly notified to the neighboring eNB.
- Resource Status Request Message Type
- ENB1 measurement ID eNB1 Measurement ID
- ENB2 measurement ID eNB2 Measurement ID
- Registration Request Registration Request
- Report characteristics Report Characteristics
- -Report to cell Cell to Report
- Reporting Period Reporting Periodicity
- the carrier ID is added in addition to the “Cell ID” of the reporting cell (Cell to Report).
- Report Characteristics Physical resource block (PRB) (Periodic), -TNL Load (TNL Load) (Ind Periodic), ⁇ Hardware load (Ind Periodic), In addition to -Traffic load information (Traffic Load) (Ind Periodic) May be added.
- PRB Physical resource block
- TNL Load TNL Load
- ⁇ Hardware load Ind Periodic
- Traffic Load In addition to -Traffic load information (Traffic Load) (Ind Periodic) May be added.
- the traffic load information (Traffic Load) (Ind Periodic) indicates the traffic load information (Traffic Load) of each component carrier (CC) using several levels (LowLoad, MediumLoad, HighLoad,). It is information and is periodically reported according to the reporting characteristics (Reporting Periodicity).
- CA carrier aggregation
- a carrier ID is similarly added in the resource status update (Resource Status Update). Further, traffic load information (Traffic Load Indicator) may be added.
- the load information (Load Information) and the resource state (Resource Status) can be notified to the neighboring eNB also for the second carrier.
- the present invention can be applied not only when the second carrier does not have the first identifier but also when the second carrier diverts the first identifier of the first carrier. In this case, the usage of each identifier may differ between the first carrier and the second carrier.
- ⁇ Modification of Embodiment 1> 12 and 13 are diagrams showing a modification of the exemplary first embodiment of the present invention.
- Served Carrier Information IE newly served carrier information
- Served Cell Information serves Cell Information
- the configuration information of the second carrier may be added to the served cell information (served cell information).
- the carrier frequency (EARFCN) of the additional component carrier (CC) in the carrier aggregation (CA) is notified side by side, and the carrier ID is also notified corresponding to them.
- the carrier frequencies of additional constituent carriers in carrier aggregation (CA), UL / DL EARFCN2, UL / DL EARFCN3 are included.
- the carrier frequency (EARFCN) of the additional constituent carrier (CC) in the carrier aggregation (CA) is notified side by side, and which constituent carrier (CC) is the first carrier (proprietary PCI, And / or a cell flag (Cell flag) indicating whether or not the carrier has a cell ID).
- the cell flag is composed of a bit string (the maximum number of constituent carriers aggregated from 1) (for example, the first bit is carrier 0), and 1 represents a serving carrier.
- the carrier ID is used as the second identifier of the second carrier
- the frequency index is used as the second identifier.
- the present invention is applicable not only when the second carrier does not have the first identifier, but also when the second carrier diverts the first identifier of the first carrier. Is applicable. In this case, the usage of each identifier may differ between the first carrier and the second carrier.
- ⁇ Embodiment 2> 14 and 15 are diagrams for explaining a second exemplary embodiment of the present invention.
- ⁇ ENB configuration update> the configuration information of the second carrier is also exchanged in the eNB configuration update (ENB CONFIGURATION UPDATE) and the response (ENB CONFIGURATION UPDATE ACKNOWLEDGE).
- eNB configuration update (ENB CONFIGURATION UPDATE) Message type (Message Type), -Served cell information to be added (Served Cells to Add), -Served cell information to be modified (Served Cells to Modify) Information such as.
- the information of the served cell to be added includes the information of the served cell (Served Cell Information) and neighbor information (Neighbour Information, ECGI, PCI, EARFCN).
- the information of the served cell to be modified includes the old ECGI (Old ECGI) in addition to the information of the served cell (Served Cell Information) and the neighboring cell information (Neighbour Information).
- served carrier information (Served Carrier Information) is also notified to the neighboring eNB.
- Served Carrier Information is also notified to the neighboring eNB.
- it can notify to adjacent eNB suitably according to the change of the structure of CA (the combination of the configuration carrier (CC) to be aggregated, the setting change of the said configuration carrier (CC), etc.).
- the present invention can be applied not only when the second carrier does not have the first identifier but also when the second carrier diverts the first identifier of the first carrier. In this case, the usage of each identifier may differ between the first carrier and the second carrier.
- the network load can be reduced by omitting extra information between eNBs and exchanging only necessary information.
- the present invention can be applied not only when the second carrier does not have the first identifier but also when the second carrier diverts the first identifier of the first carrier. In this case, the usage of each identifier may differ between the first carrier and the second carrier.
- CCs component carriers
- Carrier Type component carriers
- both the first carrier having the first identifier and the second carrier not having the first identifier, or only the first carrier and the second carrier, the type of the constituent carrier (CC) Is notified between eNBs.
- CC configuration carriers
- BC Backward compatible carrier
- NBC Non-backward compatible carrier
- EC Extension carrier
- an LTE initial release radio terminal capable of communication using only BC cannot actually perform communication even if instructed to perform communication using NBC or EC, and call disconnection may occur. .
- inter-frequency handovers within the same eNB (also referred to as intra-eNB / inter-frequency handover or frequency convergence), or inter-base station handover (inter-eNB handover).
- intra-eNB / inter-frequency handover or frequency convergence also referred to as intra-eNB / inter-frequency handover or frequency convergence
- inter-base station handover inter-base station handover
- the measurement is given to the UE without considering which type of configuration carrier (CC). Problems such as an excessive number of objects and measurement of configuration carriers (CC) that do not require measurement may occur. For example, even if a UE that cannot communicate with NBC performs quality measurement of another NBC, since the handover cannot be performed, the measurement is wasted.
- the type of the configuration carrier (CC) is notified to the adjacent eNB.
- CC configuration carrier
- BC configuration carrier
- NBC and EC configuration carrier
- only EC can be considered.
- this is not a limitation.
- FIG. 17 is an example of adding a carrier type (Carrier type (Component Carrier type)) to served cell information (Served Cell Information) exchanged between eNBs.
- Carrier type Component Carrier type
- Served Cell Information Serving Cell Information
- Presense is set to M (Mandatory: mandatory), as described above, notification may be made only when necessary as an option (O: Option).
- FIG. 18 is an example in which the type of carrier (Carrier type (Component carrier type)) is added to the served carrier information (Served Carrier information) exchanged at the eNB.
- Carrier type Component carrier type
- a UE that can only camp and / or communicate with a BC is handed over to a cell configured with a BC configured carrier (CC)
- a UE that can camp and / or communicate with both a BC and an NBC is BC
- NBC can be handed over to a cell composed of either constituent carrier (CC).
- the load of the handover destination can be distributed in consideration of the function classification (class) of the UE.
- the method of notifying an adjacent eNB may use the S1 interface that is an interface between the eNB and the MME (Mobility Management Entity) instead of the X2 interface that is an interface between the eNBs.
- the carrier type information may be notified to O & M (Operation and Maintenance server) or NM (Network Manager), and the configuration of the carrier set in each eNB may be controlled by the O & M or NM.
- the present invention can be applied not only when the second carrier does not have the first identifier but also when the second carrier diverts the first identifier of the first carrier. In this case, the usage of each identifier may differ between the first carrier and the second carrier.
- CA Set Information indicating a carrier set (CA set) that is a set of component carriers (CC) to perform carrier aggregation (CA) is transmitted to a radio base station. Notification between (eNB).
- CA carrier aggregation
- RRC Radio Resource Control
- RRM Radio Resource Management
- a plurality of types of configuration carriers (BC: Backward compatible carrier, NBC: Non-backward compatible carrier, EC: Extension carrier, etc.) are defined as predetermined conditions for configuring the CA set.
- a CA set always contains a specific type of configuration carrier (CC) (for example, a BC for accommodating a wireless terminal capable of communication only by BC, and a wireless terminal capable of communication by NBC). In order to do this, either BC or NBC) is necessary, or the number of constituent carriers (CC) in the CA set is within a predetermined value.
- CC configuration carrier
- UE may cause problems such as excessive measurement objects or measurement of configuration carriers (CC) that do not require measurement.
- the eNB notifies the adjacent eNB of carrier set (CA set) information indicating how the CA set is configured. For example, the neighboring eNB is notified of which CA set each constituent carrier (CC) belongs to or which constituent carrier (CC) each CA set includes.
- CA set carrier set
- FIG. 19 is an example in which the CA set identity (CA Set Identity) is notified to the served cell information (Served Cell Information) as information indicating the configuration of the CA set.
- CA Set Identity CA Set Identity
- Served Cell Information serving Cell Information
- CA Set Identity is a configuration carrier having each PCI and a Cell ID (ECGI) ( CC) indicates which (to which number) CA set each belongs (Carrier Aggregation set number). Even in the case of a configuration carrier that does not have a PCI or Cell ID, it is possible to notify the CA set information together with information indicating the carrier, for example, the Carrier ID.
- CA set carrier set
- CA Set Information Carrier Aggregation Set Indication
- CA set information (CA Set Information)
- ⁇ CA Set Identity ⁇ Configuration carrier (CC) information
- CC Configuration carrier
- PCI ⁇ PCI
- ECGI Cell ID
- the carrier ID and the carrier type are further included.
- CA set carrier set
- CC configured carrier
- the method of notifying an adjacent eNB may use the S1 interface that is an interface between the eNB and the MME (Mobility Management Entity) instead of the X2 interface that is an interface between the eNBs.
- carrier set information may be notified to O & M (Operation and Maintenance server) or NM (Network Manager), and the configuration of the carrier set in each eNB may be controlled by the O & M or NM.
- O & M Operaation and Maintenance server
- NM Network Manager
- the present invention can be applied not only when the second carrier does not have the first identifier but also when the second carrier diverts the first identifier of the first carrier. In this case, the usage of each identifier may differ between the first carrier and the second carrier.
- FIG. 22 is a block diagram showing an example of the configuration of the radio base station eNB1 (10).
- the other radio base station eNB2 (20) has the same configuration.
- the eNB 1 includes a receiver 101, a transmitter 102, a signal processing unit 103, a communication control unit 104, a resource management unit 105, an interface 106, and a load information calculation unit 107.
- the transmitter 102 and the receiver 101 transmit and receive signals that communicate with the radio terminal UE.
- the signal processing unit 103 performs data restoration from a received signal through communication with the UE, generation of a transmission signal from downlink data, and the like.
- the communication control unit 104 controls data transmission / reception and information exchange with other radio base stations.
- the load information calculation unit 107 calculates the load of the radio resource.
- the resource management unit 105 calculates radio resource control and the usage status of resources such as radio, NW (Network), and HW (Hardware).
- the interface 106 communicates with other radio base stations and upper stations.
- the processing of at least one of the signal processing unit 103, the communication control unit 104, the resource management unit 105, and the interface 106 can be realized by a program executed on a computer constituting the radio base station.
- FIG. 23 is a diagram for explaining the operation of a radio base station (eNB) according to an embodiment of the present invention.
- the radio base station transmits an X2 connection request (X2 SETUP REQUEST), an eNB setting update (ENB CONFIGURATION UPDATE), a new notification or update of the CA configuration.
- a predetermined event occurs (YES in step S1), such as when notification is made, the configuration information of the second carrier or the load information of the second carrier (calculated by the load information calculation unit 107 in FIG. 22), Alternatively, predetermined information such as the resource usage status of the second carrier is generated (generated by the resource management unit 105 in FIG. 22) (step S2), and the predetermined information is transmitted via the communication control unit 104 and the interface 106. Transmit to another radio base station (step S3).
- predetermined information related to the second carrier (configuration information of the second carrier, load information of the second carrier, or the second carrier)
- the predetermined information is received by the interface 106 and the communication control unit 104 (step S12).
- Adjustment (scheduling) such as interference level and load distribution is performed in relation to the carrier (step S13).
- the predetermined information related to the second carrier is communicated via the transmission path X2 between the radio base stations has been described. Or O & M), and it is of course possible to notify another radio base station from the host device.
- the carrier ID in the embodiment can be used not only for information exchange between radio base stations (eNBs) but also for information exchange between radio base stations (eNBs) and radio terminals (UEs).
- eNBs radio base stations
- UEs radio terminals
- the eNB when the eNB first notifies the UE of information related to the second carrier, frequency information and the like are notified as the configuration information of the second carrier, and the carrier ID is also added.
- the amount of information communicated between the radio base station (eNB) and the radio terminal (UE) can be reduced.
- a method of assigning a carrier ID not only to the second carrier not having the first identifier but also to the first carrier having the first identifier may be used.
- 3GPP LTE 3GPP LTE
- 3GPP WCDMA Wideband Code Multiple Access
- GSM Global System for
- WiMAX Worldwide Interoperability for Microwave Access
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Abstract
Description
本発明は、日本国特許出願:特願2009-249499号(2009年10月29日出願)の優先権主張に基づくものであり、同出願の全記載内容は引用をもって本書に組み込み記載されているものとする。
バックワードコンパティブルキャリア(Backward compatible carrier:「BC」と略記される)、
ノン・バックワードコンパティブルキャリア(Non-backward compatible carrier:「NBC」と略記される)、
エクステンションキャリア(Extension carrier:「EC」と略記される)の3つの種類が定義されている。
(A)BC2におけるOIをそのまま流用する方法と、
(B)BC2におけるOIを全物理リソースブロック(PRB)で平均化して、それをNBC2とEC2のOIとする方法、
が考えられる。
図1は、本発明の一つの形体の無線通信システムの概略構成の例を示す図である。この無線通信システムは、無線基地局(eNB:evolved NodeB)eNB1とeNB2、無線端末(UE:User Equipment:ユーザ装置)UE1を含む。
図2は、X2で情報交換が行われる場合のメッセージタイプ(Message Type)を例示している。
・キャリアアグリゲーション(CA)する構成キャリア(CC)のうち、個別の第1の識別子を持たずキャリアアグリゲーション(CA)する構成キャリア(CC)の一部として機能する構成キャリア(CC)(第2のキャリア)の構成情報や、
・当該構成キャリア(CC)(当該第2のキャリア)における負荷情報(Load Information)、
・リソース使用状況(Resource Status)
等を含む。個別の第1の識別子としては、物理(層)セルID(PCI)やグローバルセルID(ECGI)等がある。
・当該第2のキャリアが属するCAの構成キャリア(CC)群(キャリアセット)(CA set)のうち、個別の第1の識別子(例えば、ECGI)をもつ構成キャリア(CC)(第1のキャリア)がどれであるかを示す情報や、
・当該第1のキャリアの周波数、
・システム帯域幅、
・構成キャリアの種類(CCタイプ)(BC/NBC/EC)
等の情報がある。ここで、第1のキャリアとしてBCが、第2のキャリアとして、NBCやECが考えられる。ただし、これに限定されるものではなく、NBCやECでも第1のキャリアになる場合があってもよい。また、構成キャリアの種類は、BC/NBC/EC以外であっても良い。
・上りリンク干渉の過負荷情報(Uplink Interference Overload Indication:OI)、
・上りリンクの高干渉情報(Uplink High Interference Indication:HII)、
・下りリンク送信電力情報(Relative Narrowband Tx Power:RNTP)、
がある。
・高干渉(High interference)、
・中干渉(Medium interference)、
・低干渉(Low interference)等
の情報で示される。これらは、例えば、上りリンクの既知信号(リファレンス信号:Reference signal、又はパイロット信号:Pilot signalともいう)の信号対干渉電力比(Signal to Interference and Noise Ratio:SINR)を算出し、予め設定された複数の所定の閾値とそれぞれ比較することで判定される。既知信号ではなく、データの上り信号のSINRを算出して、所定の閾値と比較して判定するようにしても良い。さらに、上りの干渉を推定する方法であれば、これらに限定されるものでないことは勿論である。
・干渉に敏感(High interference sensitivity)か、
・干渉に敏感でない(Low interference sensitivity)か、のいずれかで示される情報である。これは、例えば、当該PRBを使用する(使用している)通信が、干渉に敏感(干渉に耐性がある)かどうかで判定される。あるいは、当該PRBを使用する(使用している)通信が、セル端の無線端末によるものかどうかで判定されるようにしても良い。この場合、セル端であれば、干渉に敏感(High Interferene sensitivity)になる。
・無線リソース使用状況(Radio Resource Status)、
・ハードウェア負荷情報(Hardware Load Indicator)、
・S1ネットワーク負荷情報(S1 TNL Load Indicator)、
等がある。
図3乃至図11は、本発明の例示的な第1の実施形態を説明するための図である。
本実施形態では、図3に示すように、X2接続確立要求(X2 SETUP REQUEST)とその応答(X2 SETUP RESONSE)で、第2のキャリアの構成情報をeNB間で交換する。
・Message Type IE(Information Element)、
・Global eNB ID IE、
・Served Cells IE、
・GU(Globally Unique) Group Id List IE、
等の情報を通知する。
・サーブドセル情報項目(Served Cell Information IE)と、
・隣接情報項目(Neighbour Information IE)
が含まれる。
・物理(層)セルID:PCI、
・グローバルセルID:ECGI、
・トラッキングエリアコード(Tracking Area Code:TAC)、
・パブリック・ランド・モバイル・ネットワーク・アイデンティティー(Public Land Mobile Network Identity:PLMN(公共地上移動体ネットワーク)識別子)、
・FDD情報(Frequency Division Duplex(周波数分割多重) Info)、などを含む。
・上りリンクキャリア周波数番号(UL EARFCN(EUTRAN Absolute Radio Frequency Channel Number):キャリア周波数のインデックスに対応する)、
・下りリンクキャリア周波数番号(DL EARFCN:キャリア周波数のインデックスに対応する)、
・上りリンク送信帯域幅(UL Transmission Bandwidth)、
・下りリンク送信帯域幅(DL Transmission Bandwidth)
がある。
・キャリアID(Carrier ID)、
・サービングPCI(Serving PCI)、
・FDD情報(FDD Info)、
等が含まれる。
第1の識別子として、ECGI、
第2の識別子として、キャリアID
を用いてもよい。あるいは、
第1の識別子として、ECGI、
第2の識別子として、PCIとしてもよい。
・メッセージタイプ(Message Type)、
・セルID(Cell ID)、
・上りリンク干渉の過負荷情報(UL Interference Overload Indication)、
・上りリンク高干渉情報(UL High Interference Information)、
・狭帯域送信電力情報(Relative Narrowband Tx Power)等の情報を含む。
・メッセージタイプ(Message Type)、
・eNB1測定ID(eNB1 Measurement ID)、
・eNB2測定ID(eNB2 Measurement ID)、
・登録要求(Registration Request)、
・報告の特徴(Report Characteristics)、
・報告セル(Cell to Report)、
・報告周期(Reporting Periodicity)
等が通知される。
・物理リソースブロック(PRB)(周期的(Periodic))、
・TNL負荷(TNL Load)(Ind Periodic)、
・ハードウエア負荷(Ind Periodic)、
に加え、
・トラフィック負荷情報(Traffic Load)(Ind Periodic)
を追加してもよい。
図12、図13は、本発明の例示的な第1の実施形態の変形例を示す図である。前記実施形態では、図4において、第2のキャリアの構成情報を通知するため、新たにサーブドキャリア情報(Served Carrier Information IE)を、サーブドセル情報(Served Cell Information)とは別に定義している。しかし、この方法以外に、サーブドセル情報(Served Cell Information)に、第2のキャリアの構成情報を追加するようにしてもよい。
図14、図15は、本発明の例示的な第2の実施形態を説明するための図である。
本実施形態では、図14に示すように、eNB設定更新(ENB CONFIGURATION UPDATE)と、その応答(ENB CONFIGURATION UPDATE ACKNOWLEDGE)において、第2のキャリアの構成情報も交換する。
・メッセージタイプ(Message Type)、
・追加するサーブドセルの情報(Served Cells to Add)、
・修正するサーブドセルの情報(Served Cells to Modify)
等の情報を通知する。
本発明の例示的な第3の実施形態を説明する。本発明において、第2のキャリアの構成情報等の交換は、X2接続要求(X2 SETUP REQUEST)や、eNB設定更新(ENB CONFIGURATION UPDATE)以外に、CAの構成の新規通知や更新通知を、別のMessage Typeを定義して行う構成としてもよい。
本発明の例示的な第4の実施形態においては、すべての種類の構成キャリア(CC:Component Carrier)、あるいは特定の種類の構成キャリア(CC)の種類(Carrier Type)を無線基地局(eNB)間で通知する。例えば、第1の識別子を持つ第1のキャリアと第1の識別子を持たない第2のキャリアの両方、あるいは、第1のキャリアと第2のキャリアのいずれかのみ、構成キャリア(CC)の種類をeNB間で通知する。
本発明の例示的な第5の実施形態では、キャリアアグリゲーション(CA)する構成キャリア(CC:Component Carrier)の組であるキャリアセット(CAセット)を示す情報(CA Set Information)を、無線基地局(eNB)間で通知する。
・CA Set Identity、
・構成キャリア(CC)情報、
・PCI、
・Cell ID(ECGI)
を含む。
101 受信器
102 送信器
103 信号処理部
104 通信制御部
105 リソース管理部
106 インタフェース
107 負荷情報算出部
eNB1、2 無線基地局
UE ユーザ装置(端末)
Claims (32)
- 一の無線局が、第1の識別子が付与されるキャリアである少なくとも1つの第1のキャリアと1つのキャリアセットに束ねられる第2のキャリアに関する所定の情報を、直接又は間接に、他の無線局に通知する、ことを特徴とする無線通信システム。
- 前記一の無線局、及び、前記一の無線局と通信を行う無線端末は、前記キャリアセットに含まれる複数のキャリアを同時に用いて通信を行う機能を有する、請求項1記載の無線通信システム。
- 前記一の無線局は、前記第1のキャリアと関連付けされた前記第2のキャリアに関する前記所定の情報を通信する、請求項1又は2記載の無線通信システム。
- 前記第2のキャリアに関する前記所定の情報が、
前記第1の識別子とは別種の識別子であって、前記第2のキャリアに付与された第2の識別子を少なくとも含む、請求項1乃至3のいずれか1項に記載の無線通信システム。 - 前記第2の識別子が、
キャリアID、
キャリア周波数、
キャリア周波数のインデックス、
前記第1のキャリアからの周波数オフセット、
のいずれか1つを少なくとも含み、
前記キャリアIDは、少なくとも前記キャリアセット内で個別とされる、請求項4記載の無線通信システム。 - 前記第2のキャリアには、前記第1のキャリアと共通に前記第1の識別子が付与される、請求項1乃至5のいずれか1項に記載の無線通信システム。
- 前記第2のキャリアに関する前記所定の情報が、
前記第2のキャリアの構成情報、
前記第2のキャリアの負荷情報、
前記第2のキャリアのリソース使用状況、
の少なくとも1つを含む、請求項1乃至6のいずれか1項に記載の無線通信システム。 - 前記第2のキャリアの構成情報が、
前記第1のキャリアとの関係、
前記第2のキャリアの周波数情報、
前記第2のキャリアの種類、
の少なくとも1つを含む請求項7記載の無線通信システム。 - 前記第2のキャリアの負荷情報が、
過負荷情報(Overload Indication)、
高干渉情報(High Interference Indication)、
狭帯域送信電力情報(Relative Narrowband Tx Power)、の少なくともいずれか1つを含む、請求項7又は8記載の無線通信システム。 - 前記第2のキャリアのリソース使用状況が、
無線リソース使用率(Radio Resource Status)、
トランスポートネットワーク層使用率(Transport Network Layer Load)、
ハードウェア使用率(Hardware Load)、
トラフィックロード(Traffic Load)、
の少なくとも1つを含む、請求項7乃至9のいずれか1項に記載の無線通信システム。 - 周波数の互いに異なる複数のキャリアを束ねたキャリアセットを構成し、前記キャリアセットが互いに異なる種類のキャリアを含み、前記キャリアセットに含まれる複数のキャリアを同時に用いて通信を行う機能を有する一の無線局が、
前記キャリアセットに含まれる少なくとも1つの種類のキャリアの情報を、他の無線局に通知する、ことを特徴とする無線通信システム。 - 周波数の互いに異なる複数のキャリアを束ねたキャリアセットを構成し、前記キャリアセットが互いに異なる種類のキャリアを含み、前記キャリアセットに含まれる複数のキャリアを同時に用いて通信を行う機能を有する一の無線局が、
前記キャリアセットと各キャリアの関係を示すキャリアセット情報を、他の無線局に通知する、ことを特徴とする無線通信システム。 - 前記キャリアセット情報が、
前記キャリアがどの前記キャリアセットに属するかを示す情報、及び/又は、
前記キャリアセットがどのキャリアを含むかを示す情報
を含む、請求項12記載の無線通信システム。 - 前記一の無線局が、無線基地局又は基地局制御局である、請求項1乃至13のいずれか1項に記載の無線通信システム。
- 前記一の無線局及び前記他の無線局がともに無線基地局であり、
一の無線基地局は、
他の無線基地局との間の伝送路を用いたメッセージ送信、又は、
他の無線基地局との間での通信接続確立のためのセットアップ要求、又は、
他の無線基地局に対して送信する前記無線基地局のコンフィギュレーション更新情報に、
前記第2のキャリアに関する前記所定の情報を含めて送信する、請求項1乃至14のいずれか1項に記載の無線通信システム。 - 第1の識別子が付与されるキャリアである少なくとも1つの第1のキャリアと1つのキャリアセットに束ねられる第2のキャリアに関する所定の情報を、直接又は間接に、他の無線局に通知する、ことを特徴とする無線局。
- 前記キャリアセットに含まれる複数のキャリアを同時に用いて通信を行う機能を有する、請求項16記載の無線局。
- 前記第1のキャリアと関連付けされた前記第2のキャリアに関する前記所定の情報を通信する、請求項16又は17記載の無線局。
- 前記第2のキャリアに関する前記所定の情報が、
前記第1の識別子とは別種の識別子であって、前記第2のキャリアに付与された第2の識別子を少なくとも含む、請求項16乃至18のいずれか1項に記載の無線局。 - 前記第2の識別子が、キャリアID、
キャリア周波数、
キャリア周波数のインデックス、
前記第1のキャリアからの周波数オフセット、
のいずれか1つを少なくとも含み、
前記キャリアIDは、少なくとも前記キャリアセット内で個別とされる、請求項19記載の無線局。 - 前記第2のキャリアには、前記第1のキャリアと共通に前記第1の識別子が付与される、請求項16乃至20のいずれか1項に記載の無線局。
- 前記第2のキャリアに関する前記所定の情報が、
前記第2のキャリアの構成情報、
前記第2のキャリアの負荷情報、
前記第2のキャリアのリソース使用状況、
の少なくとも1つを含む、請求項16乃至21のいずれか1項に記載の無線局。 - 前記第2のキャリアの構成情報として、
前記第1のキャリアとの関係、
前記第2のキャリアの周波数情報、
前記第2のキャリアの種類、
の少なくとも1つを含む、請求項22記載の無線局。 - 前記第2のキャリアの負荷情報が、
過負荷情報(Overload Indication)、
高干渉情報(High Interference Indication)、
狭帯域送信電力情報(Relative Narrowband Tx Power)、の少なくともいずれか1つを含む、請求項22又は23記載の無線局。 - 前記第2のキャリアのリソース使用状況が、
無線リソース使用率(Radio Resource Status)、
トランスポートネットワーク層使用率(Transport Network Layer Load)、
ハードウェア使用率(Hardware Load)、
トラフィックロード(Traffic Load)、
の少なくとも1つを含む、請求項22乃至24のいずれか1項に記載の無線局。 - 一の無線局が、第1の識別子が付与されるキャリアである少なくとも1つの第1のキャリアと1つのキャリアセットに束ねられる第2のキャリアに関する所定の情報を、直接又は間接に、他の無線局に通知する、ことを特徴とする無線通信方法。
- 前記一の無線局、及び、前記一の無線局と通信を行う無線端末は、前記キャリアセットに含まれる複数のキャリアを同時に用いて通信を行う機能を有する、請求項26記載の無線通信方法。
- 前記一の無線局は、前記第1のキャリアと関連付けされた前記第2のキャリアに関する前記所定の情報を通信する、請求項26又は27記載の無線通信方法。
- 前記第2のキャリアに関する前記所定の情報が、
前記第1の識別子とは別種の識別子であって、前記第2のキャリアに付与された第2の識別子を少なくとも含む、請求項26乃至28のいずれか1項に記載の無線通信方法。 - 第1の識別子が付与されるキャリアである少なくとも1つの第1のキャリアと1つのキャリアセットに束ねられる第2のキャリアに関する所定の情報を、直接又は間接に、他の無線局に通知する処理を、無線局を構成するコンピュータに実行させるプログラム。
- 前記第1のキャリアと関連付けされた前記第2のキャリアに関する前記所定の情報を通信する処理を前記コンピュータに実行させる、請求項30記載のプログラム。
- 前記第2のキャリアに関する前記所定の情報が、
前記第1の識別子とは別種の識別子であって、前記第2のキャリアに付与された第2の識別子を少なくとも含む、請求項30又は31記載のプログラム。
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Also Published As
Publication number | Publication date |
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EP2496034A1 (en) | 2012-09-05 |
JP6269787B2 (ja) | 2018-01-31 |
JP2018074610A (ja) | 2018-05-10 |
KR101367239B1 (ko) | 2014-02-25 |
EP3606167A1 (en) | 2020-02-05 |
JP2019220976A (ja) | 2019-12-26 |
US10447441B2 (en) | 2019-10-15 |
KR20130119000A (ko) | 2013-10-30 |
KR20140043481A (ko) | 2014-04-09 |
US20230132975A1 (en) | 2023-05-04 |
JP2019033540A (ja) | 2019-02-28 |
JP6428907B2 (ja) | 2018-11-28 |
CN102598823A (zh) | 2012-07-18 |
US20190393997A1 (en) | 2019-12-26 |
US11991099B2 (en) | 2024-05-21 |
JP6579251B2 (ja) | 2019-09-25 |
CN108173635A (zh) | 2018-06-15 |
EP2496034A4 (en) | 2017-07-12 |
ES2773761T3 (es) | 2020-07-14 |
JPWO2011052643A1 (ja) | 2013-03-21 |
US20120213123A1 (en) | 2012-08-23 |
JP5790504B2 (ja) | 2015-10-07 |
JP2017063469A (ja) | 2017-03-30 |
EP2496034B1 (en) | 2019-11-20 |
CN108173635B (zh) | 2022-05-10 |
US11569948B2 (en) | 2023-01-31 |
JP7088146B2 (ja) | 2022-06-21 |
KR20120081184A (ko) | 2012-07-18 |
JP6044683B2 (ja) | 2016-12-14 |
KR101432687B1 (ko) | 2014-08-25 |
KR101432692B1 (ko) | 2014-08-25 |
JP2015233314A (ja) | 2015-12-24 |
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