WO2015159879A1 - ユーザ装置、基地局、上りデータ分割比率算出方法、及び上りデータ分割比率提供方法 - Google Patents
ユーザ装置、基地局、上りデータ分割比率算出方法、及び上りデータ分割比率提供方法 Download PDFInfo
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- WO2015159879A1 WO2015159879A1 PCT/JP2015/061463 JP2015061463W WO2015159879A1 WO 2015159879 A1 WO2015159879 A1 WO 2015159879A1 JP 2015061463 W JP2015061463 W JP 2015061463W WO 2015159879 A1 WO2015159879 A1 WO 2015159879A1
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- user apparatus
- load information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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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
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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
- H04L5/0058—Allocation criteria
- H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
- H04W28/09—Management thereof
- H04W28/0925—Management thereof using policies
- H04W28/0933—Management thereof using policies based on load-splitting ratios
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Definitions
- the present invention relates to a technique in which a user apparatus transmits data to a plurality of base stations in a mobile communication system.
- CA carrier aggregation
- CC component carriers
- Dual connectivity dual connectivity has been proposed in which this is further expanded and simultaneous communication is performed using CCs under different base stations eNB to achieve high throughput (Non-patent Document 1). . That is, in Dual connectivity, the user apparatus UE performs communication using radio resources of two physically different base stations eNB at the same time.
- Dual connectivity is also called Inter eNB CA (inter-base station carrier aggregation), and introduces Master-eNB (MeNB) and Secondary-eNB (SeNB).
- FIG. 2 shows an example of dual connectivity.
- the MeNB communicates with the user apparatus UE at CC # 1
- the SeNB communicates with the user apparatus UE at CC # 2, thereby realizing dual connectivity.
- MCG Master Cell Group, master cell group
- SCG Secondary Cell Group, secondary cell group
- UL bearer split uplink bearer split
- data of one bearer (which may be referred to as a packet) is transmitted from a user apparatus UE to a plurality of base stations is being studied.
- a bearer is a logical communication path of packets.
- FIG. 3 shows an example of uplink bearer division in the dual connectivity shown in FIG.
- the user apparatus UE transmits a part (specific ratio) of data of one bearer to the base station MeNB by CC # 1, and the remaining data is transmitted to the base station by CC # 2.
- Transmit to SeNB the base station SeNB transmits the data received by CC # 2 to the base station MeNB, and the base station MeNB transfers the data to the core network 10.
- the radio interface protocol in LTE is composed of PHY (Physical), MAC (Media Access Control), RLC (Radio Link Control), PDCP (Packet Data Convergence Protocol), and the user equipment UE processes each entity (corresponding protocol). Functional part).
- PHY Physical
- MAC Media Access Control
- RLC Radio Link Control
- PDCP Packet Data Convergence Protocol
- the user equipment UE processes each entity (corresponding protocol). Functional part).
- PDCP PDU one bearer data (PDCP PDU) is divided in the PDCP entity, and one data is an RLC / MAC entity that performs processing for transmission to the base station MeNB. And the other data is passed to the RLC / MAC entity that performs processing for transmission to the base station SeNB.
- the reference “1” is a value for the base station MeNB
- the “2” is a value for the base station SeNB.
- the amount of PDCP data to be UL transmitted is X
- the amount of RLC data to be UL transmitted to the base station MeNB is Y1
- the amount of RLC data to be UL transmitted to the base station SeNB is Y2.
- the division ratio of PDCP data (hereinafter referred to as the ratio) is ⁇ .
- This ratio ⁇ is a ratio of the data amount transmitted to the base station MeNB with respect to the total data amount transmitted to the base station MeNB and the base station SeNB. The same applies to the following description. However, defining the ratio in this way is only an example.
- the data amount (buffer size) of data transmitted to the base station MeNB is ⁇ X + Y1
- the data amount (buffer size) transmitted to the base station SeNB is (1 ⁇ ) X + Y2.
- the present invention has been made in view of the above points, and a user apparatus appropriately calculates a division ratio used when uplink data is divided and transmitted to a first base station and a second base station. It is an object to provide a technology that makes it possible.
- the user apparatus in a mobile communication system comprising a first base station and a second base station that communicate with the user apparatus by inter-base station carrier aggregation, A radio quality acquisition unit that acquires a first radio quality between the user apparatus and the first base station, and a second radio quality between the user apparatus and the second base station; A load information acquisition unit that acquires first load information that is load information in the first base station and second load information that is load information in the second base station; Using the first and second radio qualities acquired by the radio quality acquisition unit and the first and second load information acquired by the load information acquisition unit, the user apparatus can transmit uplink data.
- a user apparatus is provided that includes a ratio calculation unit that calculates a division ratio used to divide and transmit the data to the first base station and the second base station.
- the user apparatus in a mobile communication system including a first base station and a second base station that communicate with the user apparatus by inter-base station carrier aggregation, A first transmission rate that is a data transmission rate from the user apparatus to the first base station and a second transmission rate that is a data transmission rate from the user apparatus to the second base station.
- a transmission rate acquisition unit to acquire; In order for the user apparatus to divide and transmit uplink data to the first base station and the second base station using the first and second transmission rates acquired by the transmission rate acquisition unit
- a user apparatus is provided that includes a ratio calculation unit that calculates a division ratio to be used.
- the first base station in the mobile communication system including the first base station and the second base station that communicate with the user apparatus by inter-base station carrier aggregation.
- a base station A radio quality acquisition unit that acquires a first radio quality between the user apparatus and the first base station, and a second radio quality between the user apparatus and the second base station;
- a load information acquisition unit that acquires first load information that is load information in the first base station and second load information that is load information in the second base station;
- the user apparatus can transmit uplink data.
- a ratio calculation unit that calculates a division ratio used for dividing and transmitting the first base station and the second base station;
- a base station is provided that includes a transmission unit that transmits the division ratio calculated by the ratio calculation unit to the user apparatus.
- the first base station in the mobile communication system including the first base station and the second base station that communicate with the user apparatus by inter-base station carrier aggregation.
- a base station A first transmission rate that is a data transmission rate from the user apparatus to the first base station and a second transmission rate that is a data transmission rate from the user apparatus to the second base station.
- a transmission rate acquisition unit to acquire; In order for the user apparatus to divide and transmit uplink data to the first base station and the second base station using the first and second transmission rates acquired by the transmission rate acquisition unit
- a ratio calculation unit for calculating a division ratio to be used for A base station is provided that includes a transmission unit that transmits the division ratio calculated by the ratio calculation unit to the user apparatus.
- a user apparatus it is possible for a user apparatus to appropriately calculate a division ratio used when uplink data is divided and transmitted to a first base station and a second base station. .
- FIG. 6 is a diagram for explaining Example 1-3 in the first embodiment. It is a figure which shows the example of transition of ratio (alpha) in Example 1-3. It is a figure for demonstrating the example 2-1 in 2nd Embodiment. It is a figure for demonstrating Example 2-2 in 2nd Embodiment. It is a figure for demonstrating Example 2-3 in 2nd Embodiment. It is a functional block diagram of the user apparatus UE. It is a flowchart which shows operation
- LTE Long Term Evolution
- FIG. 5 shows a configuration example of a mobile communication system according to an embodiment of the present invention (common to the first embodiment and the second embodiment).
- the mobile communication system according to the present embodiment includes a base station MeNB and a base station SeNB that are respectively connected to the core network 10, and enables dual connectivity with the user apparatus UE. Further, the base station MeNB and the base station SeNB can communicate with each other through, for example, an X2 interface.
- the user apparatus UE performs bearer division at the time of UL transmission, and divides and transmits uplink data to the base station MeNB and the base station SeNB.
- bearer division data for the base station MeNB and data for the base station SeNB are distributed using the ratio ⁇ .
- the user apparatus UE determines the ratio ⁇ will be described as the first embodiment
- the base station MeNB determines the ratio ⁇ and notifies the user apparatus UE will be described as the second embodiment. To do.
- the user apparatus UE determines the ratio ⁇ according to a predetermined rule.
- the outline of the first embodiment will be described with reference to FIG.
- the user apparatus UE includes a ratio calculation unit 101 that is a functional unit that calculates the ratio ⁇ , and two pieces of data of one bearer (communication path) according to the ratio ⁇ (for MeNB and SeNB).
- the data distribution part 102 which is a function part which distributes to is included.
- Example 1-1 in which the ratio ⁇ is determined based on radio quality and load information (load information), and Example 1 in which the ratio ⁇ is determined based on the UL transmission rate (UL transmission speed). 2 and Example 1-3 combining Example 1-1 and Example 1-2. Each example will be described below. Note that Example 1-1 can be called an open loop method, and Example 1-2 can be called a closed loop method.
- the PDCP entity calculates the ratio ⁇ .
- the bearer data is divided by the PDCP entity.
- the division may be performed in the previous stage of PDCP (a layer higher than PDCP), or in the latter stage of PDCP ( The division may be performed in a layer lower than PDCP.
- Example 1-1 The processing contents of Example 1-1 will be described with reference to FIG.
- FIG. 7 is a diagram mainly illustrating a PDCP entity that executes processing according to Example 1-1 in the user apparatus UE.
- the sequence number assignment, header compression, concealment, and PDCP header assignment functions in the PDCP entity are existing functions.
- the scheduler 100 shown in FIG. 7 performs ratio determination and distribution. That is, in the example of FIG. 7, the scheduler 100 includes the ratio calculation unit 101 and the data distribution unit 102 illustrated in FIG. 6. This also applies to FIGS. 9 and 11.
- the scheduler 100 receives path loss PL 1 (t) and PL 2 (t) and traffic load information (hereinafter, load information) Load 1 (t) and Load 2 (t), and these information Based on the above, the ratio ⁇ is calculated and data is distributed.
- the data 6 is distributed to the queue 1 according to the ratio ⁇ (t) at time t.
- the queue 1 corresponds to a buffer for PDCP data for the base station MeNB
- the queue 2 corresponds to a buffer for PDCP data for the base station SeNB.
- the buffer for storing the distributed data may be a buffer of any layer.
- PL 1 in path loss PL 1 (t) and PL 2 (t) (t) is the path loss at time t between the base stations MeNB and the user equipment UE, PL 2 (t), the base station SeNB and the user equipment UE It is a path loss at time t.
- Each path loss may be calculated (estimated) by the user apparatus UE based on a received signal from the base station (MeNB, SeNB) or the path loss calculated (estimated) in the base station (MeNB, SeNB) It is good also as UE receiving from base station MeNB etc. and using.
- the path loss is an example of wireless quality, and information other than the path loss may be acquired as the wireless quality and used for calculating the ratio ⁇ . The same applies to other examples using path loss. Examples of the wireless quality information other than the path loss used for calculating the ratio ⁇ include CQI, RSRP, and RSRQ.
- Load 1 (t) in the load information Load 1 (t) and Load 2 (t) is the load (load) information of the base station MeNB
- Load2 (t) is the load information of the base station SeNB.
- Each load information may be calculated by the base station (MeNB, SeNB) and received by the user apparatus UE from the base station (MeNB, SeNB), or the signal received by the user apparatus UE from each base station. It is good also as calculating (estimating) based on quality information (RSRQ etc.). For example, Load increases as the number of active UEs in the corresponding base station eNB (MCG, SCG) increases.
- the calculation method of the load information in the base station is not particularly limited, but for example, the method described in the second embodiment can be used.
- ⁇ (t) f (PL 1 ( t), PL 2 (t), Load 1 (t), Load 2 (t)). Examples of calculation formulas for calculating ⁇ are shown below.
- ER is an estimated rate and is calculated by the following formula.
- k i is a compensating factor (predetermined coefficient).
- Equation 1 the ratio to the base station side with the smaller load and the smaller path loss becomes larger. Note that calculating the ratio using Equation 1 is merely an example, and the ratio may be calculated by another method using the wireless quality and the load information.
- the load information may be received by the user apparatus UE from the base station (MeNB, SeNB), or may be estimated by the user apparatus UE.
- the user apparatus UE receives load information from the base station (MeNB, SeNB)
- the Load 1 (t) may be received from the base station MeNB
- the Load 2 (t) may be received from the base station SeNB.
- the base station MeNB may receive Load 2 (t) from the base station SeNB
- the base station MeNB may notify the user apparatus UE of Load 1 (t) and Load 2 (t).
- the notification of the load information from the base station (MeNB, SeNB) to the user apparatus UE may be performed using an RRC signal, a MAC signal, or a signal other than these.
- the base station MeNB may perform notification of the load information with the addition of SeNB (SCG) as a trigger.
- SCG SeNB
- the base station MeNB transmits an RRC signal to the user apparatus UE, but can notify the load information using the RRC signal.
- the base station may notify the user apparatus UE of the load information using as a trigger the load at the base station MeNB or the base station SeNB has changed by a predetermined threshold or more. For example, if the predetermined threshold value at the base station MeNB is 3, and the load value of the base station MeNB is 10 at a certain time point T1, and the load value becomes 13 at the time point T2, the load value has changed by more than the threshold value. An operation of notifying Load 1 (t) to the user apparatus UE is performed. This trigger may notify both Load 1 (t) and Load 2 (t).
- the predetermined threshold may be set separately between the base stations as the threshold 1 for the base station MeNB and the threshold 2 for the base station SeNB, or a common threshold may be used.
- a prohibit timer (prohibitTimer) may be provided, and the load information may be notified only when the prohibit timer is not activated.
- the prohibit timer starts when the load information is notified.
- the prohibit timer may be common between base stations, or a value for each base station may be set.
- a load information notification trigger is generated, and the load information is notified to the user apparatus UE (step 101).
- the prohibit timer is started.
- a load information notification trigger occurs, but no load information is notified because the prohibit timer is active.
- the load timer is notified because the prohibit timer has expired (step 102). At this time, the prohibit timer is started.
- Example 1-2 will be described with reference to FIG.
- the user apparatus UE performs UL transmission rate R 1 (t) to the base station MeNB (MCG) and UL transmission rate R 2 (to the base station SeNB (SCG).
- t) is measured (acquired), and the scheduler 100 calculates the ratio ⁇ (t) using R 1 (t) and R 2 (t).
- the transmission rate of PDCP data (UL PDCP PDU) is used as the UL transmission rate used for calculating the ratio ⁇ , but the UL transmission rate used for calculating the ratio ⁇ is a transmission rate other than the transmission rate of PDCP data. It may be.
- the UL transmission rate may be a UL MAC PDU transmission rate, a UL RLC PDU transmission rate, or another data transmission rate.
- MAC CE, RLC control PDU, PDCP control PDU, MAC retransmission, and RLC retransmission may not be subject to rate calculation.
- the transmission rate is measured (calculated), for example, periodically. However, the transmission rate may not be measured at the timing when there is no UL transmission. That is, the value of R does not have to be updated at the timing when there is no UL transmission.
- the transmission rate may be measured by the user apparatus UE, or the base station (MeNB, SeNB) measures the UL data reception rate (corresponding to the transmission rate seen from the user apparatus UE), and the measured value is You may notify to the user apparatus UE.
- the base station MeNB, SeNB
- the method described in the second embodiment can be used.
- Example of the formula for calculating the ratio ⁇ in Example 1-2 is shown below.
- B j (t) is the amount of data staying in the buffer j at time t.
- D (t) is the inflow data amount at time t.
- R j (t) is the UL transmission rate of buffer j at time t.
- ⁇ t is a control period (eg, BSR reporting period).
- the buffer 1 is a buffer in which data for the base station MeNB is stored
- the buffer 2 is a buffer in which data for the base station SeNB is stored. Equation 2 above is derived as follows.
- the data amount B 1 (t) staying in the buffer 1 at the time t flows into the buffer from t- ⁇ t to t to the buffer staying amount (B 1 (t- ⁇ t)) at the time t- ⁇ t. Since the amount of data ( ⁇ (t) ⁇ D (t)) is added and the amount of data transmitted during that time (R 1 (t) ⁇ ⁇ t (data amount read from the buffer)) is subtracted, It is calculated as follows.
- B 1 (t) B 1 (t ⁇ t) + ⁇ (t) ⁇ D (t) ⁇ R 1 (t) ⁇ ⁇ t
- B 2 (t) is calculated as follows.
- Example 1-3 is a system that combines Example 1-1 (open loop system) and Example 1-2 (closed loop system). That is, as illustrated in FIG. 11, in Example 1-3, the scheduler 100 performs path loss (PL 1 (0), PL 2 (0)), load information (Load 1 (0), Load 2 (0)), The ratio ⁇ is calculated from the UL transmission rate (R 1 (t), R 2 (t)). The method for acquiring the path loss, the load information, and the UL transmission rate is as described above.
- ⁇ (0) f (PL 1 (0), PL 2 (0), Load 1 (0), Load 2 (0))
- ⁇ (t) f ( ⁇ (t ⁇ 1), R 1 (t), R 2 (t))
- ⁇ (0) in Example 1-3 is calculated by the following formula.
- ⁇ (t) is calculated by the following equation.
- Example 1-3 an example of change in ⁇ over time will be described.
- the base station calculates the ratio ⁇ , notifies the user apparatus UE of the calculated ratio ⁇ , and the user apparatus UE performs data according to the received ratio ⁇ . Sort out.
- the ratio ⁇ may be calculated by either the base station MeNB or the base station SeNB, but in the following example, an example in which the base station MeNB calculates is described.
- Example 2-1, Example 2-2, and Example 2-3 described below correspond to Example 1-1, Example 1-2, and Example 1-3, respectively.
- Example 2-1 The processing contents of Example 2-1 will be described with reference to FIG.
- the base station MeNB includes a scheduler 200 as a functional unit that calculates the ratio ⁇ and transmits the calculated ratio ⁇ to the user apparatus UE.
- Example 2-1 the base station MeNB acquires PL 1 (t), PL 2 (t), Load 1 (t), and Load 2 (t), and based on these, the calculation described in Example 1-1
- the ratio ⁇ is calculated using the formula.
- the base station MeNB can use a value calculated (estimated) by itself.
- base station SeNB calculates and transmits to the base station MeNB by X2 interface.
- the information transmitted through the X2 interface may be PL 2 (t) or Load 2 (t) itself, or may be information used for calculating these.
- the information includes, for example, transmission power information (for example, PHR) for calculating path loss, the number of connected UEs for calculating load information (details will be described later), and the like.
- the base station MeNB receives transmission power information (eg, PHR) related to MCG and transmission power information related to SCG from the user apparatus UE, and uses the received transmission power information, PL 1 ( t) and PL 2 (t) may be calculated.
- transmission power information eg, PHR
- PHR transmission power information
- PL 1 ( t) and PL 2 (t) may be calculated.
- the base station MeNB receives quality information (eg, RSRQ) related to MCG and quality information related to SCG from the user apparatus UE, and uses the received quality information to load 1 (t) and Load 2. (T) may be calculated (estimated).
- quality information eg, RSRQ
- RSRQ quality information
- SCG quality information related to SCG
- T Load 2.
- the base station MeNB and the base station SeNB are respectively the RRC connected UE count, the scheduling UE count, the DRX UE ratio, the individual resource usage rate, the CPU usage rate in the base station, the PDSCH / PUSCH / PUCCH usage rate, and the DL buffer retention amount.
- the load information can be calculated using any one or more of the above.
- Example 2-2 The processing contents of Example 2-2 will be described with reference to FIG.
- the scheduler 200 of the base station MeNB acquires R 1 (t) and R 2 (t), and calculates the ratio ⁇ using the calculation formula described in Example 1-2.
- the base station MeNB can use a value calculated (estimated) by itself. For example, the base station SeNB calculates R 2 (t) and transmits it to the base station MeNB via the X2 interface.
- the base station MeNB calculates the UL transmission rate in the user apparatus UE as the UL reception rate.
- the UL reception rate may be any of UL MAC SDU reception rate, UL RLC SDU reception rate, and UL PDCP SDU reception rate.
- only a specific bearer rate (for example, a bearer for which bearer split is set) may be calculated.
- Example 2-3 The processing contents of Example 2-3 will be described with reference to FIG.
- Example 2-3 is a combination of Example 2-1 and Example 2-2.
- the scheduler 200 of the base station MeNB uses the calculation formula described in Example 1-3 to perform path loss (PL 1 (0), PL 2 (0)), load information (Load 1 (0)). , Load 2 (0)) and the UL transmission rate (R 1 (t), R 2 (t)), the ratio ⁇ is calculated.
- FIG. 16 shows a functional configuration diagram of the user apparatus UE corresponding to the first embodiment.
- the user apparatus UE includes a DL signal reception unit 301, a UL signal transmission unit 302, a load information acquisition unit 303, a radio quality acquisition unit 304, a transmission rate acquisition unit 305, and UL retention data.
- a management unit 306 and a ratio calculation unit 307 are included.
- the DL signal reception unit 301 receives a radio signal from the base station (MeNB, SeNB) and extracts information from the radio signal.
- UL signal transmission part 302 produces
- the UL signal transmission unit 302 includes a buffer 1 and a buffer 2 for UL data.
- the load information acquisition unit 303 acquires load information (eg, Load 1 (t), Load 2 (t)) by signal measurement or information reception from the base station.
- the radio quality acquisition unit 304 acquires radio quality (for example, PL 1 (0), PL 2 (0)) by signal measurement or information reception from the base station.
- the transmission rate acquisition unit 305 acquires the transmission rates (R 1 (t), R 2 (t)) by measuring the transmission data rate or receiving information from the base station.
- the UL retention data management unit 306 includes a function of distributing transmission data to buffers according to the ratio ⁇ calculated by the ratio calculation unit 307.
- the ratio calculation unit 307 calculates the ratio ⁇ by the method described in Examples 1-1 to 1-3.
- FIG. 17 shows a flowchart of the operation of the user apparatus UE corresponding to the first embodiment.
- the user apparatus UE acquires parameters such as radio quality, load information, and transmission rate (step 201).
- the user apparatus UE calculates the ratio ⁇ using the parameter acquired in step 201 (step 202), and distributes the uplink data to be bearer divided into the buffer 1 and the buffer 2 based on the ratio ⁇ (step 203).
- the user apparatus UE transmits the distributed data to the base stations (MeNB, SeNB) according to the resource allocation from the base stations (MeNB, SeNB) based on the buffer amount report (step 204).
- FIG. 18 shows a functional configuration diagram of the base station MeNB corresponding to the second embodiment.
- base station SeNB is provided with the structure similar to the structure shown in FIG.
- the base station MeNB includes a DL signal transmission unit 401, a UL signal reception unit 402, a load information acquisition unit 403, a radio quality acquisition unit 404, a transmission rate acquisition unit 405, and DL retention data.
- a management unit 406, a ratio calculation unit 407, a ratio notification unit 408, an inter-base station communication unit 409, and a scheduling unit 410 are included.
- the DL signal transmission part 401 produces
- the UL signal receiving unit 402 receives a radio signal from the user apparatus UE and extracts information from the radio signal.
- the DL signal transmission unit 401 includes a buffer that temporarily stores data to be transmitted to the user apparatus UE.
- the load information acquisition unit 403 acquires load information (for example, Load 1 (t), Load 2 (t)) by signal measurement, calculation from scheduling information, and information reception from the base station SeNB.
- the radio quality acquisition unit 404 acquires radio quality (eg, PL 1 (0), PL 2 (0)) by signal measurement, information reception from the base station SeNB, or the like.
- the transmission rate acquisition unit 405 acquires the transmission rate (R 1 (t), R 2 (t)) by measuring the rate of received data, receiving information from the base station SeNB, or the like.
- the DL retention data management unit 406 acquires the retention amount of the DL buffer. The retention amount can be used for calculation of load information.
- the ratio calculation unit 407 calculates the ratio ⁇ by the method described in Examples 2-1 to 2-3 (that is, Examples 1-1 to 1-3).
- the ratio notification unit 408 performs control for transmitting the ratio ⁇ calculated by the ratio calculation unit 407 to the user apparatus UE.
- the inter-base station communication unit 409 performs data communication with the base station SeNB.
- the scheduling unit 410 performs scheduling such as radio resource allocation to the user apparatus UE. Resource allocation information obtained by scheduling can be used for calculation of load information.
- FIG. 19 shows a flowchart of the operation of the base station MeNB corresponding to the second embodiment.
- the base station MeNB acquires parameters such as radio quality, load information, and transmission rate (step 301).
- the base station MeNB calculates the ratio ⁇ using the parameter acquired in step 301 (step 302), and notifies the user apparatus UE of the ratio ⁇ (step 303).
- the user apparatus in the mobile communication system including the first base station and the second base station that communicate with the user apparatus by inter-base station carrier aggregation, A radio quality acquisition unit that acquires a first radio quality between the user apparatus and the first base station and a second radio quality between the user apparatus and the second base station; A load information acquisition unit that acquires first load information that is load information in the first base station and second load information that is load information in the second base station; and the radio quality acquisition unit
- the user apparatus uses the first and second radio qualities acquired by the above and the first and second load information acquired by the load information acquisition unit to transmit uplink data to the first data Base station and said
- the user device is provided and a ratio calculation unit for calculating a dividing ratio to be used for transmission is divided into the base station.
- the said user apparatus in a mobile communication system provided with the 1st base station and 2nd base station which communicate with a user apparatus by the carrier aggregation between base stations, Comprising: A transmission rate acquisition unit that acquires a first transmission rate that is a data transmission rate to one base station and a second transmission rate that is a data transmission rate from the user apparatus to the second base station And using the first and second transmission rates acquired by the transmission rate acquisition unit, the user apparatus divides uplink data into the first base station and the second base station, and transmits the divided data.
- a user apparatus is provided that includes a ratio calculation unit that calculates a division ratio to be used.
- the user equipment can appropriately calculate the division ratio used to divide and transmit uplink data to the first base station and the second base station. It becomes. As a result, UL throughput can be improved.
- the number of base stations with which user apparatuses communicate simultaneously is not limited to two. Even if the number of base stations is 3 or more, the division ratio can be calculated as described above for any two base stations, and as a result, the ratios for all base stations are calculated. It is possible.
- the user apparatus acquires a first radio quality between the user apparatus and the first base station, and a second radio quality between the user apparatus and the second base station.
- a load information acquisition unit that acquires a radio quality acquisition unit, first load information that is load information in the first base station, and second load information that is load information in the second base station;
- the ratio calculation unit includes the first and second radio qualities acquired by the radio quality acquisition unit, the first and second load information acquired by the load information acquisition unit, and
- the division ratio may be calculated using the first and second transmission rates acquired by the transmission rate acquisition unit. In this configuration, since more parameters are used, the division ratio can be calculated more accurately.
- it is a base station corresponding to the first base station in the mobile communication system including the first base station and the second base station that communicate with the user apparatus by inter-base station carrier aggregation. And a radio quality acquisition unit that acquires a first radio quality between the user apparatus and the first base station and a second radio quality between the user apparatus and the second base station.
- a load information acquisition unit that acquires first load information that is load information in the first base station and second load information that is load information in the second base station, and the radio quality acquisition
- the user apparatus uses the first and second radio qualities acquired by the unit and the first and second load information acquired by the load information acquisition unit to transmit the uplink data to the first Base station and the second Provided is a base station comprising: a ratio calculation unit that calculates a division ratio used for dividing and transmitting to a ground station; and a transmission unit that transmits the division ratio calculated by the ratio calculation unit to the user apparatus. .
- it is a base station corresponding to the first base station in the mobile communication system including the first base station and the second base station that communicate with the user apparatus by inter-base station carrier aggregation.
- a first transmission rate that is a data transmission rate from the user apparatus to the first base station
- a second transmission rate that is a data transmission rate from the user apparatus to the second base station.
- the user apparatus uses the first and second transmission rates acquired by the transmission rate acquisition unit and the transmission rate acquisition unit to acquire uplink data from the first base station and the second base station.
- a ratio calculation unit that calculates a division ratio used for dividing and transmitting to the base station, and a transmission unit that transmits the division ratio calculated by the ratio calculation unit to the user apparatus.
- the base station is provided.
- the base station By configuring the base station as described above, the base station appropriately calculates the division ratio used by the user apparatus to divide and transmit uplink data to the first base station and the second base station. It becomes possible.
- the base station acquires a first radio quality between the user apparatus and the first base station, and a second radio quality between the user apparatus and the second base station.
- a load information acquisition unit that acquires a radio quality acquisition unit, first load information that is load information in the first base station, and second load information that is load information in the second base station;
- the ratio calculation unit includes the first and second radio qualities acquired by the radio quality acquisition unit, the first and second load information acquired by the load information acquisition unit, and
- the division ratio may be calculated using the first and second transmission rates acquired by the transmission rate acquisition unit. In this configuration, since more parameters are used, the division ratio can be calculated more accurately.
- segmentation ratio calculation method which the said user apparatus performs in the mobile communication system provided with the 1st base station and 2nd base station which communicate with a user apparatus by the carrier aggregation between base stations
- a radio quality acquisition for acquiring a first radio quality between the user apparatus and the first base station and a second radio quality between the user apparatus and the second base station.
- a load information acquisition step of acquiring first load information that is load information in the first base station, and second load information that is load information in the second base station, and the radio quality
- the user apparatus uses the first and second radio qualities acquired by the acquisition step and the first and second load information acquired by the load information acquisition step.
- Uplink data division ratio calculation method and a ratio calculating step of calculating the dividing ratio to use uplink data for transmission is divided into the second base station and the first base station.
- segmentation ratio calculation method which the said user apparatus performs in the mobile communication system provided with the 1st base station and 2nd base station which communicate with a user apparatus by the carrier aggregation between base stations A first transmission rate that is a data transmission rate from the user apparatus to the first base station, and a second transmission that is a data transmission rate from the user apparatus to the second base station.
- An uplink data division ratio calculation method comprising: a ratio calculation step of calculating a division ratio used for dividing and transmitting to two base stations
- the base station corresponding to the said 1st base station in the mobile communication system provided with the 1st base station and 2nd base station which communicate with a user apparatus by the carrier aggregation between base stations performs A method for providing an uplink data division ratio, comprising: a first radio quality between the user apparatus and the first base station; and a second radio between the user apparatus and the second base station.
- the user apparatus calculates a division ratio used for dividing and transmitting uplink data to the first base station and the second base station, and the division calculated by the ratio calculation step
- An uplink data division ratio providing method comprising: a transmission step of transmitting a ratio to the user apparatus.
- the base station corresponding to the said 1st base station in the mobile communication system provided with the 1st base station and 2nd base station which communicate with a user apparatus by the carrier aggregation between base stations performs A method for providing an uplink data division ratio, the first transmission rate being a data transmission rate from the user apparatus to the first base station, and the data transmission from the user apparatus to the second base station
- Uplink data division ratio provides a method of the dividing ratio that issued and a transmission to the step for transmitting to the user equipment.
- Each of the above methods makes it possible to appropriately calculate the division ratio used for the user apparatus to divide and transmit uplink data to the first base station and the second base station.
- the user apparatus described in the present embodiment may include a CPU and a memory, and may be realized by a program being executed by a CPU (processor). Processing logic described in the present embodiment It may be a configuration realized by hardware such as a hardware circuit provided with a program, or a configuration in which a program and hardware are mixed.
- the base station described in this embodiment may include a CPU and a memory, and may be configured by a program being executed by a CPU (processor).
- the processing logic described in this embodiment may be used. It may be a configuration realized by hardware such as a hardware circuit provided with a program, or a configuration in which a program and hardware are mixed.
- the operations of a plurality of functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by a plurality of components.
- the user apparatus and the base station have been described using functional block diagrams. However, each of such apparatuses may be realized by hardware, software, or a combination thereof.
- Software operated by the processor of the user equipment and software operated by the processor of the base station are random access memory (RAM), flash memory, read only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk,
- RAM random access memory
- ROM read only memory
- EPROM EPROM
- EEPROM electrically erasable programmable read only memory
- register hard disk
- HDD hard disk
- removable disk removable disk
- the data may be stored in any appropriate storage medium such as a CD-ROM, a database, a server, or the like.
- the present invention is not limited to the above embodiments, and various modifications, modifications, alternatives, substitutions, and the like are included in the present invention without departing
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Abstract
Description
前記ユーザ装置と前記第1の基地局との間の第1の無線品質と、前記ユーザ装置と前記第2の基地局との間の第2の無線品質とを取得する無線品質取得部と、
前記第1の基地局における負荷情報である第1の負荷情報と、前記第2の基地局における負荷情報である第2の負荷情報とを取得する負荷情報取得部と、
前記無線品質取得部により取得された前記第1及び第2の無線品質と、前記負荷情報取得部により取得された前記第1及び第2の負荷情報とを用いて、前記ユーザ装置が、上りデータを前記第1の基地局と前記第2の基地局に分割して送信するために使用する分割比率を算出する比率算出部とを備えるユーザ装置が提供される。
前記ユーザ装置から前記第1の基地局へのデータ送信のレートである第1の送信レートと、前記ユーザ装置から前記第2の基地局へのデータ送信のレートである第2の送信レートとを取得する送信レート取得部と、
前記送信レート取得部により取得された前記第1及び第2の送信レートを用いて、前記ユーザ装置が、上りデータを前記第1の基地局と前記第2の基地局に分割して送信するために使用する分割比率を算出する比率算出部とを備えるユーザ装置が提供される。
前記ユーザ装置と前記第1の基地局との間の第1の無線品質と、前記ユーザ装置と前記第2の基地局との間の第2の無線品質とを取得する無線品質取得部と、
前記第1の基地局における負荷情報である第1の負荷情報と、前記第2の基地局における負荷情報である第2の負荷情報とを取得する負荷情報取得部と、
前記無線品質取得部により取得された前記第1及び第2の無線品質と、前記負荷情報取得部により取得された前記第1及び第2の負荷情報とを用いて、前記ユーザ装置が、上りデータを前記第1の基地局と前記第2の基地局に分割して送信するために使用する分割比率を算出する比率算出部と、
前記比率算出部により算出した前記分割比率を前記ユーザ装置に送信する送信部とを備える基地局が提供される。
前記ユーザ装置から前記第1の基地局へのデータ送信のレートである第1の送信レートと、前記ユーザ装置から前記第2の基地局へのデータ送信のレートである第2の送信レートとを取得する送信レート取得部と、
前記送信レート取得部により取得された前記第1及び第2の送信レートを用いて、前記ユーザ装置が、上りデータを前記第1の基地局と前記第2の基地局に分割して送信するために使用する分割比率を算出する比率算出部と、
前記比率算出部により算出した前記分割比率を前記ユーザ装置に送信する送信部とを備える基地局が提供される。
図5に本発明の実施の形態(第1の実施の形態と第2の実施の形態に共通)に係る移動通信システムの構成例を示す。図5に示すように、本実施の形態に係る移動通信システムは、それぞれコアネットワーク10に接続される基地局MeNBと基地局SeNBを備え、ユーザ装置UEとの間でDual connectivityを可能としている。また、基地局MeNBと基地局SeNBとの間は、例えばX2インターフェースにより通信可能である。
まず、第1の実施の形態を説明する。第1の実施の形態では、ユーザ装置UEが所定のルールに従って比率αを決定する。図6を参照して第1の実施の形態の概要を説明する。図6に示すように、ユーザ装置UEは、比率αの算出を行う機能部である比率算出部101と、比率αに従って1つのベアラ(通信路)のデータを2つ(MeNB向けとSeNB向け)に振り分ける機能部であるデータ振り分け部102を含む。
図7を参照して例1-1の処理内容を説明する。図7は、ユーザ装置UEにおける例1-1に係る処理を実行するPDCPエンティティを主に示す図である。PDCPエンティティにおけるシーケンス番号付与、ヘッダ圧縮、秘匿、PDCPヘッダ付与の各機能は既存の機能である。図7に示すスケジューラ100が、比率決定及び振り分けを行う。すなわち、図7の例では、スケジューラ100が、図6に示した比率算出部101とデータ振り分け部102を含む。この点は図9、図11でも同様である。
次に、図9を参照して例1-2を説明する。図9に示すように、例1-2では、ユーザ装置UEが、基地局MeNB(MCG)へのUL送信レートR1(t)と、基地局SeNB(SCG)へのUL送信レートR2(t)を測定(取得)し、スケジューラ100が、R1(t)とR2(t)を用いて比率α(t)を算出する。
同様にして、B2(t)は以下のようにして算出される。
そして、本例では、B1(t)=B2(t)をターゲットとして解くことにより、上記のようにα(t)を求める式2が得られる。なお、B1(t)=B2(t)をターゲットとすることは一例である。また、上記各式に対し、忘却係数が考慮されても良い。
次に、例1-3について説明する。例1-3は、例1-1(オープンループ方式)と例1-2(クローズドループ方式)を組み合わせた方式である。すなわち、図11に示すように、例1-3では、スケジューラ100は、パスロス(PL1(0)、PL2(0))、ロード情報(Load1(0)、Load2(0))、UL送信レート(R1(t)、R2(t))から比率αを算出する。パスロス、ロード情報、及びUL送信レートの取得方法はこれまでに説明したとおりである。
次に、第2の実施の形態を説明する。前述したように、第2の実施の形態では、基地局(MeNB又はSeNB)が比率αを算出し、算出した比率αをユーザ装置UEに通知し、ユーザ装置UEは、受信した比率αに従ってデータの振り分けを行う。比率αは基地局MeNBと基地局SeNBのうちのどちらで算出してもよいが、以下の例では、基地局MeNBが算出する例を説明する。
図13を参照して例2-1の処理内容を説明する。図13に示すように、基地局MeNBは、比率αを算出し、算出した比率αをユーザ装置UEに送信する機能部としてのスケジューラ200を備える。
図14を参照して例2-2の処理内容を説明する。例2-2では、基地局MeNBのスケジューラ200は、R1(t)とR2(t)を取得し、例1-2で説明した算出式を用い比率αを算出する。
図15を参照して例2-3の処理内容を説明する。例2-3は、例2-1と例2-2を組み合わせた方式である。例2-3では、基地局MeNBのスケジューラ200が、例1-3で説明した算出式を用いて、パスロス(PL1(0)、PL2(0))、ロード情報(Load1(0)、Load2(0))、UL送信レート(R1(t)、R2(t))から比率αを算出する。
図16に、第1の実施の形態に対応するユーザ装置UEの機能構成図を示す。図16に示すように、本実施の形態のユーザ装置UEは、DL信号受信部301、UL信号送信部302、ロード情報取得部303、無線品質取得部304、送信レート取得部305、UL滞留データ管理部306、比率算出部307を有する。
100、200 スケジューラ
301 DL信号受信部
302 UL信号送信部
303 ロード情報取得部
304 無線品質取得部
305 送信レート取得部
306 UL滞留データ管理部
307 比率算出部
401 DL信号送信部
402 UL信号受信部
403 ロード情報取得部
404 無線品質取得部
405 送信レート取得部
406 DL滞留データ管理部
407 比率算出部
408 比率通知部
409 基地局間通信部
410 スケジューリング部
Claims (10)
- 基地局間キャリアアグリゲーションによりユーザ装置と通信を行う第1の基地局及び第2の基地局を備える移動通信システムにおける前記ユーザ装置であって、
前記ユーザ装置と前記第1の基地局との間の第1の無線品質と、前記ユーザ装置と前記第2の基地局との間の第2の無線品質とを取得する無線品質取得部と、
前記第1の基地局における負荷情報である第1の負荷情報と、前記第2の基地局における負荷情報である第2の負荷情報とを取得する負荷情報取得部と、
前記無線品質取得部により取得された前記第1及び第2の無線品質と、前記負荷情報取得部により取得された前記第1及び第2の負荷情報とを用いて、前記ユーザ装置が、上りデータを前記第1の基地局と前記第2の基地局に分割して送信するために使用する分割比率を算出する比率算出部と
を備えることを特徴とするユーザ装置。 - 基地局間キャリアアグリゲーションによりユーザ装置と通信を行う第1の基地局及び第2の基地局を備える移動通信システムにおける前記ユーザ装置であって、
前記ユーザ装置から前記第1の基地局へのデータ送信のレートである第1の送信レートと、前記ユーザ装置から前記第2の基地局へのデータ送信のレートである第2の送信レートとを取得する送信レート取得部と、
前記送信レート取得部により取得された前記第1及び第2の送信レートを用いて、前記ユーザ装置が、上りデータを前記第1の基地局と前記第2の基地局に分割して送信するために使用する分割比率を算出する比率算出部と
を備えることを特徴とするユーザ装置。 - 前記ユーザ装置と前記第1の基地局との間の第1の無線品質と、前記ユーザ装置と前記第2の基地局との間の第2の無線品質とを取得する無線品質取得部と、
前記第1の基地局における負荷情報である第1の負荷情報と、前記第2の基地局における負荷情報である第2の負荷情報とを取得する負荷情報取得部と、を更に備え、
前記比率算出部は、前記無線品質取得部により取得された前記第1及び第2の無線品質と、前記負荷情報取得部により取得された前記第1及び第2の負荷情報と、前記送信レート取得部により取得された前記第1及び第2の送信レートを用いて、前記分割比率を算出する
ことを特徴とする請求項2に記載のユーザ装置。 - 基地局間キャリアアグリゲーションによりユーザ装置と通信を行う第1の基地局及び第2の基地局を備える移動通信システムにおける前記第1の基地局に対応する基地局であって、
前記ユーザ装置と前記第1の基地局との間の第1の無線品質と、前記ユーザ装置と前記第2の基地局との間の第2の無線品質とを取得する無線品質取得部と、
前記第1の基地局における負荷情報である第1の負荷情報と、前記第2の基地局における負荷情報である第2の負荷情報とを取得する負荷情報取得部と、
前記無線品質取得部により取得された前記第1及び第2の無線品質と、前記負荷情報取得部により取得された前記第1及び第2の負荷情報とを用いて、前記ユーザ装置が、上りデータを前記第1の基地局と前記第2の基地局に分割して送信するために使用する分割比率を算出する比率算出部と、
前記比率算出部により算出した前記分割比率を前記ユーザ装置に送信する送信部と
を備えることを特徴とする基地局。 - 基地局間キャリアアグリゲーションによりユーザ装置と通信を行う第1の基地局及び第2の基地局を備える移動通信システムにおける前記第1の基地局に対応する基地局であって、
前記ユーザ装置から前記第1の基地局へのデータ送信のレートである第1の送信レートと、前記ユーザ装置から前記第2の基地局へのデータ送信のレートである第2の送信レートとを取得する送信レート取得部と、
前記送信レート取得部により取得された前記第1及び第2の送信レートを用いて、前記ユーザ装置が、上りデータを前記第1の基地局と前記第2の基地局に分割して送信するために使用する分割比率を算出する比率算出部と、
前記比率算出部により算出した前記分割比率を前記ユーザ装置に送信する送信部と
を備えることを特徴とする基地局。 - 前記ユーザ装置と前記第1の基地局との間の第1の無線品質と、前記ユーザ装置と前記第2の基地局との間の第2の無線品質とを取得する無線品質取得部と、
前記第1の基地局における負荷情報である第1の負荷情報と、前記第2の基地局における負荷情報である第2の負荷情報とを取得する負荷情報取得部と、を更に備え、
前記比率算出部は、前記無線品質取得部により取得された前記第1及び第2の無線品質と、前記負荷情報取得部により取得された前記第1及び第2の負荷情報と、前記送信レート取得部により取得された前記第1及び第2の送信レートを用いて、前記分割比率を算出する
ことを特徴とする請求項5に記載の基地局。 - 基地局間キャリアアグリゲーションによりユーザ装置と通信を行う第1の基地局及び第2の基地局を備える移動通信システムにおける前記ユーザ装置が実行する上りデータ分割比率算出方法であって、
前記ユーザ装置と前記第1の基地局との間の第1の無線品質と、前記ユーザ装置と前記第2の基地局との間の第2の無線品質とを取得する無線品質取得ステップと、
前記第1の基地局における負荷情報である第1の負荷情報と、前記第2の基地局における負荷情報である第2の負荷情報とを取得する負荷情報取得ステップと、
前記無線品質取得ステップにより取得された前記第1及び第2の無線品質と、前記負荷情報取得ステップにより取得された前記第1及び第2の負荷情報とを用いて、前記ユーザ装置が、上りデータを前記第1の基地局と前記第2の基地局に分割して送信するために使用する分割比率を算出する比率算出ステップと
を備えることを特徴とする上りデータ分割比率算出方法。 - 基地局間キャリアアグリゲーションによりユーザ装置と通信を行う第1の基地局及び第2の基地局を備える移動通信システムにおける前記ユーザ装置が実行する上りデータ分割比率算出方法であって、
前記ユーザ装置から前記第1の基地局へのデータ送信のレートである第1の送信レートと、前記ユーザ装置から前記第2の基地局へのデータ送信のレートである第2の送信レートとを取得する送信レート取得ステップと、
前記送信レート取得ステップにより取得された前記第1及び第2の送信レートを用いて、前記ユーザ装置が、上りデータを前記第1の基地局と前記第2の基地局に分割して送信するために使用する分割比率を算出する比率算出ステップと
を備えることを特徴とする上りデータ分割比率算出方法。 - 基地局間キャリアアグリゲーションによりユーザ装置と通信を行う第1の基地局及び第2の基地局を備える移動通信システムにおける前記第1の基地局に対応する基地局が実行する上りデータ分割比率提供方法であって、
前記ユーザ装置と前記第1の基地局との間の第1の無線品質と、前記ユーザ装置と前記第2の基地局との間の第2の無線品質とを取得する無線品質取得ステップと、
前記第1の基地局における負荷情報である第1の負荷情報と、前記第2の基地局における負荷情報である第2の負荷情報とを取得する負荷情報取得ステップと、
前記無線品質取得ステップにより取得された前記第1及び第2の無線品質と、前記負荷情報取得ステップにより取得された前記第1及び第2の負荷情報とを用いて、前記ユーザ装置が、上りデータを前記第1の基地局と前記第2の基地局に分割して送信するために使用する分割比率を算出する比率算出ステップと、
前記比率算出ステップにより算出した前記分割比率を前記ユーザ装置に送信する送信ステップと
を備えることを特徴とする上りデータ分割比率提供方法。 - 基地局間キャリアアグリゲーションによりユーザ装置と通信を行う第1の基地局及び第2の基地局を備える移動通信システムにおける前記第1の基地局に対応する基地局が実行する上りデータ分割比率提供方法であって、
前記ユーザ装置から前記第1の基地局へのデータ送信のレートである第1の送信レートと、前記ユーザ装置から前記第2の基地局へのデータ送信のレートである第2の送信レートとを取得する送信レート取得ステップと、
前記送信レート取得ステップにより取得された前記第1及び第2の送信レートを用いて、前記ユーザ装置が、上りデータを前記第1の基地局と前記第2の基地局に分割して送信するために使用する分割比率を算出する比率算出ステップと、
前記比率算出ステップにより算出した前記分割比率を前記ユーザ装置に送信する送信すステップと
を備えることを特徴とする上りデータ分割比率提供方法。
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