WO2005125259A1 - 伝送速度制御方法、送信電力制御方法、送信電力比制御方法、移動通信システム、移動局及び無線基地局 - Google Patents
伝送速度制御方法、送信電力制御方法、送信電力比制御方法、移動通信システム、移動局及び無線基地局 Download PDFInfo
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- WO2005125259A1 WO2005125259A1 PCT/JP2005/011153 JP2005011153W WO2005125259A1 WO 2005125259 A1 WO2005125259 A1 WO 2005125259A1 JP 2005011153 W JP2005011153 W JP 2005011153W WO 2005125259 A1 WO2005125259 A1 WO 2005125259A1
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- user data
- uplink user
- transmission power
- mobile station
- transmission
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Classifications
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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]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/22—Negotiating communication rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1803—Stop-and-wait protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/25—Flow control; Congestion control with rate being modified by the source upon detecting a change of network conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/04—Protocols specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
Definitions
- Transmission rate control method transmission power control method, transmission power ratio control method, mobile communication system, mobile station and radio base station
- the present invention relates to a transmission rate control method for controlling a transmission rate of uplink user data transmitted from a mobile station to a radio base station, and a mobile communication system, a mobile station, and a mobile station for implementing the transmission rate control method.
- a transmission rate control method for controlling a transmission rate of uplink user data transmitted from a mobile station to a radio base station, and a mobile communication system, a mobile station, and a mobile station for implementing the transmission rate control method.
- the present invention relates to a transmission power control method for controlling transmission power of uplink user data transmitted to a mobile station-powered radio base station, a mobile communication system for realizing the transmission power control method, and a mobile communication system. Station and a radio base station.
- the present invention provides a transmission power ratio control method for controlling a transmission power ratio of uplink user data transmitted to a mobile station-capable radio base station, and a mobile station for implementing the transmission power ratio control method.
- the present invention relates to a communication system, a mobile station, and a radio base station.
- the receiving hardware resources of the radio base station NodeB (hereinafter referred to as "reception hardware resources").
- Hardware resources uplink radio resources (uplink interference amount), transmission power of the mobile station UE, transmission processing performance of the mobile station UE, transmission speed required by a higher-order application, and so on. It is configured to determine the transmission rate of uplink user data and notify each of the mobile station UE and the radio base station NodeB as a Layer 3 (Radio Resource Control layer) message.
- Layer 3 Radio Resource Control layer
- the radio network controller RNC is a device that exists above the radio base station NodeB and controls the radio base station NodeB and the mobile station UE.
- the radio network controller RNC generally controls a large number of radio base stations NodeB, and the radio network controller Since it is assumed that the processing load and processing delay at the station RNC will increase, it is difficult to perform high-speed (for example, 1 to: about LOOms) change control of the transmission rate of uplink user data. ! /, There was a problem.
- 3GPP and 3GPP2 which are international standardization organizations for third-generation mobile communication systems
- a layer between the radio base station NodeB and the mobile station UE is used in order to effectively utilize uplink radio resources.
- High-speed uplink radio resource control methods in the 1 and MAC sublayers (Layer 2) have been studied. In the following, the functions studied or considered are collectively referred to as “EUL (Enhanced Uplink)”.
- the radio base station No deB transmits uplink user data to the radio base station NodeB at a predetermined timing.
- the mobile station UE to transmit and the transmission rate of the uplink user data are determined, and a mobile station ID for identifying the mobile station UE and the transmission rate of the uplink user data (or the maximum allowable transmission rate of the uplink user data)
- the mobile station UE transmits the uplink user data at the predetermined timing and at the transmission rate of the uplink user data (or within the range of the maximum allowable transmission rate of the uplink user data). It is configured to transmit uplink user data to the radio base station NodeB.
- the radio base station NodeB determines, at a predetermined timing, a mobile station UE that transmits uplink user data to the radio base station NodeB, and instead of the transmission rate of the uplink user data, The mobile station determines the transmission power of the uplink user data (or the transmission power ratio of the enhanced individual physical data channel (E-DPDCH) and the dedicated physical control channel (DPCCH)).
- the mobile station UE is configured to broadcast the mobile station ID for identifying the UE and the transmission power (or transmission power ratio) of the uplink user data, and the mobile station UE transmits the transmission power of the broadcast uplink user data. (Or the transmission power ratio) to determine the transmission rate of the uplink user data, and to the radio base station NodeB at the predetermined time and at the transmission rate of the uplink user data. It is configured to transmit user data, Ru.
- Rate Control is known as a second uplink radio resource control method.
- “Rate ControlJ is configured so that the mobile station UE can transmit uplink user data if there is uplink user data to transmit. .
- the radio base station NodeB transmits one or more transmission time intervals (TTI: Transmission Time Interval) of the uplink user data, the maximum allowable transmission rate of the uplink user data, the maximum allowable transmission power, or
- TTI Transmission Time Interval
- the mobile station UE is configured to determine the maximum allowable transmission power ratio and notify the mobile station UE.
- the radio base station NodeB normally sets the maximum allowable transmission speed, maximum allowable transmission power, or! ⁇ at the current timing to a relative value to the maximum allowable transmission power ratio (for example, two commands of the UP command / DOWN command). Value).
- the radio base station NodeB uses a maximum permissible transmission specific to each mobile station UE. It may be configured to specify the rate, the maximum allowable transmission power, or the maximum allowable transmission power ratio, or to specify the same maximum allowable transmission rate, maximum allowable transmission power, or maximum allowable transmission power ratio for the entire cell. It is composed of
- the radio base station NodeB specifies a maximum permissible transmission rate, a maximum permissible transmission power or a maximum permissible transmission power ratio specific to each mobile station UE, or the same maximum permissible transmission rate, Whether to specify the allowable transmission power or the maximum allowable transmission power ratio may be appropriately selected.
- a coefficient for calculating the maximum allowable transmission rate, maximum allowable transmission power or maximum allowable transmission power ratio is set as follows. May be used.
- the mobile station UE is configured to transmit uplink user data if there is uplink user data to be transmitted.
- the maximum allowable transmission rate of the user data is determined by the mobile station UE. Determined by the communication system.
- each mobile station UE existing in a cell transmits uplink control data, so that there is a problem that uplink capacity is compressed.
- the conventional "Time & Rate Control" has a problem that if a reception error occurs in downlink control data, uplink radio resources used for transmitting uplink control data are wasted.
- UP command / DOWN command (1-bit command
- a mismatch occurs in the transmission rate of the uplink user data recognized between the radio base station NodeB and the mobile station UE.
- the base station NodeB power cannot receive the uplink user data transmitted by the mobile station UE, or the transmission rate of the uplink user data assigned by the radio base station NodeB is not achieved, and the uplink wireless resource is wasted. When this happens !, there was a problem.
- the radio base station NodeB transmits the same UP command / DOWN command to the mobile station UE in the whole area of the cell to allow the maximum allowable uplink user data. Controlling the transmission speed, the maximum allowable transmission power, or the maximum allowable transmission power ratio has a problem in that the fairness of the allocation of uplink radio resources cannot be maintained!
- the radio base station NodeB transmits an UP command when there is enough uplink radio resources in the cell, so the uplink radio resources allocated to the mobile station UE # 1 and the mobile station UE # 2 increase with time, Eventually, use all uplink radio resources of the cell Will be done.
- mobile station UE # 2 since mobile station UE # 2 has started data transmission later, mobile station UE # 2 receives fewer UP commands than radio base station NodeB compared to mobile station UE # 1.
- the uplink radio resource allocated to the mobile station UE # 1 has a problem that the allocation of the uplink radio resource is less fair than the uplink radio resource allocated to the mobile station UE # 1!
- the maximum allowable transmission rate, maximum allowable transmission power, and maximum allowable transmission power ratio of uplink user data (or the maximum allowable transmission rate, maximum allowable (Coefficient for calculating transmission power ratio and maximum allowable transmission power ratio) for the entire cell (hereafter referred to as the cell common rate control method).
- the cell common rate control method When the number of connected devices is large, it is necessary to prepare more hardware resources in the wireless base station No deB, and the amount of reception buffer is increased, resulting in an increase in device cost.
- all the mobile stations UE connected to the cell have the same maximum allowable transmission rate, maximum allowable transmission power, maximum allowable transmission power ratio (or uplink user power) of the same uplink user data.
- the maximum allowable transmission rate of data, the maximum allowable transmission power, and the coefficient for calculating the maximum allowable transmission power ratio) are used in the radio base station NodeB, even for the mobile station UE with relatively little traffic. There is a problem that it is necessary to prepare the same hardware resources as the mobile station UE having a large traffic.
- the conventional "Autonomous Transmission J Puma,” which is being considered as a combination with “Time & Rate Control J” and “Rate Control J,” has a maximum permissible transmission of uplink user data by Layer 1 or MAC sublayer. Since it is not possible to control the rate, it is necessary to control the transmission rate of user data by using Layer 3 as in the past, which is arranged in the radio network controller RNC. It does not improve utilization.
- the present invention has been made in view of the above points, and it is possible to increase the throughput in the uplink without compressing the uplink capacity and the downlink capacity.
- the present invention realizes a “cell common rate control method” known as a simple transmission rate control method while minimizing the allocation of hardware resources to the minimum necessary, and saves hardware resources. It is intended to achieve a reduction in equipment cost.
- a first feature of the present invention is a transmission rate control method for controlling a transmission rate of uplink user data transmitted from a mobile station to a radio base station, wherein the mobile station is notified from a network. Has been notified that the initial transmission rate has already been notified !, the step of starting the transmission of the uplink user data at the initial transmission rate, and the mobile station, based on a predetermined transmission rate increase rule, And increasing the transmission rate of the uplink user data to a predetermined transmission rate.
- a second feature of the present invention is a transmission power control method for controlling transmission power of uplink user data transmitted from a mobile station to a radio base station, wherein the mobile station is notified from a network. Starting the transmission of the uplink user data with the initial transmission power or the already transmitted initial transmission power, and the mobile station, based on a predetermined transmission power increase rule! / Increasing the transmission power of uplink user data to a predetermined transmission power.
- a third feature of the present invention is a transmission power ratio control method for controlling a transmission power ratio of uplink user data transmitted from a mobile station to a radio base station, wherein the transmission power of the uplink user data is The ratio is a ratio of the enhanced dedicated physical data channel related to the uplink user data to the dedicated physical data channel related to the uplink user data, and the mobile station power network power
- the notified initial transmission power ratio or the already notified initial power ratio A step of starting transmission of the uplink user data at a transmission power ratio, and the mobile station sets a transmission power ratio of the uplink user data to a predetermined transmission power ratio based on a predetermined transmission power ratio increase rule. And increasing the transmission power ratio.
- a fourth feature of the present invention is a mobile communication system for controlling the transmission rate of uplink user data transmitted from a mobile station to a radio base station, wherein the mobile station is notified from a network power.
- the transmission of the uplink data is started at an initial transmission rate that is already notified or at an initial transmission rate that has already been notified, and the transmission is started based on a predetermined transmission rate increase rule.
- the gist of the present invention is to increase the transmission rate of uplink user data to a predetermined transmission rate.
- a fifth feature of the present invention is a mobile communication system for controlling transmission power of uplink user data transmitted from a mobile station to a radio base station, wherein the mobile station is notified from a network power.
- the transmission of the uplink data is started with the initial transmission power that has been transmitted or the initial transmission power that has already been notified, and the transmission power of the uplink user data is transmitted by a predetermined transmission based on a predetermined transmission power increase rule.
- the point is that the system is configured to increase to electric power.
- a sixth feature of the present invention is a mobile communication system for controlling a transmission power ratio of uplink user data transmitted from a mobile station to a radio base station, wherein the transmission power ratio of the uplink user data is controlled. Is the ratio of the enhanced dedicated physical data channel related to the uplink user data to the dedicated physical data channel related to the uplink user data, and
- the transmission of the uplink user data is started at the initial transmission power ratio at which the network power is also reported or at the already transmitted initial transmission power ratio, and the uplink user data is transmitted based on a predetermined transmission power ratio increase rule. Increase the transmission power ratio to the specified transmission power ratio! / Is configured to work!
- the gist is that
- a seventh feature of the present invention is a mobile station that transmits uplink user data at a predetermined transmission rate to a radio base station, wherein the mobile station transmits an initial transmission rate or a network power notification.
- the transmission of the uplink user data is started at the already notified initial transmission rate, and the transmission rate of the uplink user data is increased to a predetermined transmission rate based on a predetermined transmission rate increase rule,
- the gist is to be structured so that
- An eighth feature of the present invention is a mobile station that transmits uplink user data with a predetermined transmission power to a radio base station, wherein the mobile station has an initial transmission power or a network power notification.
- the transmission of the uplink user data is started at the already notified initial transmission power, and the transmission power of the uplink user data is increased to a predetermined transmission power based on a predetermined transmission power increase rule.
- the gist of the present invention is as follows.
- a ninth feature of the present invention is a mobile station that transmits uplink user data to a radio base station at a predetermined transmission power ratio, wherein the transmission power ratio of the uplink user data is The dedicated physical data channel pertaining to the uplink user data to the dedicated physical data channel pertaining to the uplink data, wherein the mobile station is configured to transmit the network power at an initial transmission power ratio notified or at an already notified initial transmission power ratio.
- the transmission of the uplink user data is started, and the transmission power ratio of the uplink user data is increased to a predetermined transmission power ratio based on a predetermined transmission power ratio increase rule.
- the gist is that
- a tenth feature of the present invention is a radio base station that receives uplink user data transmitted from a mobile station, wherein the initial transmission rate or the initial transmission rate notified from the network has already been notified.
- An uplink radio resource is allocated so that the uplink user data can be received at a transmission rate, and the uplink radio resource is allocated every time the transmission rate of the uplink user data is increased based on a predetermined transmission rate increase rule.
- the gist is that it is configured to increase resources.
- An eleventh feature of the present invention resides in a radio base station that receives uplink user data transmitted from a mobile station, wherein the network power is notified of the initial transmission power or the already transmitted initial transmission power. Allocating uplink radio resources so that uplink user data can be received, and increasing the allocated uplink radio resources each time the transmission power of the uplink user data is increased based on a predetermined transmission power increase rule.
- the main point is to be structured so that
- a twelfth feature of the present invention is a radio base station that receives uplink user data transmitted from a mobile station, wherein the transmission power ratio of the uplink user data is different from the enhanced individual data related to the uplink user data. It is the ratio of the physical data channel to the dedicated physical data channel related to the uplink user data, and the network power.
- An uplink radio resource is allocated so that the uplink user data can be received at the initial transmission power ratio.
- the present invention is configured to increase the allocated uplink radio resources.
- FIG. 1 is an overall configuration diagram of a general mobile communication system.
- FIG. 2 is a diagram showing user data generated in a burst in a mobile communication system according to the related art
- FIGS. 2 (b) and 2 (c) are diagrams illustrating the related art.
- FIG. 6 is a diagram for explaining a method of controlling the transmission rate of uplink user data in a mobile communication system.
- FIG. 3 is a diagram showing user data generated in a burst in a conventional mobile communication system using "13 ⁇ 4! 1 ⁇ 2 & Rate Control”
- Fig. 3 (b) is a diagram showing conventional user data.
- FIG. 9 is a diagram for explaining a method of controlling the transmission rate of uplink user data in a mobile communication system using “Time & Rate Control”.
- FIG. 4 (a) is a diagram showing user data generated in a burst manner in a mobile communication system using conventional “Rate Control”
- FIG. 4 (b) is a diagram illustrating conventional “Rate Control”.
- FIG. 8 is a diagram for explaining a method of controlling the transmission rate of uplink user data in a mobile communication system using “”.
- FIG. 5 is a diagram for explaining a problem in a conventional mobile communication system using “Rate Control”.
- FIG. 6 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention.
- FIG. 7 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention.
- FIG. 8 is a diagram for explaining a frame format of a dedicated physical channel used in the mobile communication system according to the first embodiment of the present invention.
- FIG. 9 is a functional block diagram of a mobile station according to the first embodiment of the present invention.
- FIG. 10 is a functional block diagram of a baseband signal processing unit of the mobile station according to the first embodiment of the present invention.
- FIG. 11 is a diagram for explaining a function of a baseband signal processing unit of the mobile station according to the first embodiment of the present invention.
- FIG. 12 is a functional block diagram of a MAC-e function unit in the baseband signal processing unit of the mobile station according to the first embodiment of the present invention.
- FIG. 13 is a diagram showing a baseband signal processing unit of the mobile station according to the first embodiment of the present invention.
- FIG. 5 is a diagram illustrating an operation example of a 4-channel stop-and-wait protocol performed by a HARQ processing unit of a MAC-e function unit in the embodiment.
- FIG. 14 is a diagram showing an example of a table managed by an E-TFC selection unit of a MAC-e function unit in baseband signal processing of a mobile station according to the first embodiment of the present invention. is there.
- Fig. 15 is a diagram showing how the transmission rate of uplink user data is controlled by the mobile station according to the first embodiment of the present invention.
- FIG. 16 is a diagram showing a manner in which the mobile station according to the first embodiment of the present invention controls the transmission rate of uplink user data.
- FIG. 17 is a diagram showing a state where the transmission rate of uplink user data is controlled by the mobile station according to the first embodiment of the present invention.
- FIG. 18 is a diagram showing how the transmission rate of uplink user data is controlled by the mobile station according to the first embodiment of the present invention.
- FIG. 19 is a functional block diagram of a layer 1 functional unit in a baseband signal processing unit of the mobile station according to the first embodiment of the present invention.
- FIG. 20 is a diagram for explaining functions of a layer 1 function unit in a baseband signal processing unit of the mobile station according to the first embodiment of the present invention.
- FIG. 21 is a functional block diagram of a radio base station according to the first embodiment of the present invention.
- FIG. 22 is a functional block diagram of a baseband signal processing unit of the radio base station according to the first embodiment of the present invention.
- FIG. 23 is a functional block diagram of a layer 1 functional unit in the baseband signal processing unit of the radio base station according to the first embodiment of the present invention.
- FIG. 24 is a functional block diagram of a MAC-e function unit in the baseband signal processing unit of the radio base station according to the first embodiment of the present invention.
- FIG. 25 is a functional block diagram of a radio network controller according to the first embodiment of the present invention.
- FIG. 26 is a diagram illustrating a transmission rate control method for uplink user data according to the first embodiment of the present invention. It is a figure for demonstrating a method.
- FIG. 27 is a flowchart showing an operation of a transmission rate control method for uplink user data according to the first embodiment of the present invention.
- FIG. 28 is a diagram showing an example of a table managed by an E-TFC selection unit of a MAC-e function unit in baseband signal processing of a mobile station according to the second embodiment of the present invention. .
- FIG. 29 is a diagram for explaining a transmission rate control method for uplink user data according to the second embodiment of the present invention.
- FIG. 30 is a flowchart showing an operation of an uplink user data transmission rate control method according to the second embodiment of the present invention.
- FIG. 31 is a diagram showing an example of a table managed by an E-TFC selection unit of a MAC-e function unit in baseband signal processing of a mobile station according to a third embodiment of the present invention. .
- FIG. 32 is a diagram for explaining a transmission rate control method for uplink user data according to the third embodiment of the present invention.
- FIG. 33 is a flowchart showing an operation of an uplink user data transmission rate control method according to the third embodiment of the present invention.
- FIG. 34 is a diagram showing an example of a table managed by the scheduling unit of the MAC-e function unit in the baseband signal processing of the radio base station according to the fourth embodiment of the present invention.
- FIG. 35 is a diagram showing an example of a table managed by the scheduling unit of the MAC-e function unit in the baseband signal processing of the radio base station according to the fourth embodiment of the present invention.
- the configuration of the mobile communication system according to the first embodiment of the present invention will be described with reference to FIG. 6 to FIG.
- the mobile communication system according to the present embodiment is designed for the purpose of improving communication performance such as communication capacity and communication quality. Also, in this embodiment, Such a mobile communication system is applicable to “W_CDMA” and “CDM A2000” which are the third generation mobile communication systems.
- the mobile communication system includes an exchange 1, a radio network controller RNC, a radio base station NodeB, and a mobile station UE.
- mobile stations # 1 to # 3 shown in FIG. 6 transmit and receive user data to be transmitted using dedicated physical channels # 1 to # 3 respectively set for mobile stations UE # 1 to # 3. It is carried out.
- each of the mobile stations # 1 to # 3 is configured to use a high-speed downlink shared channel (for example, HS-DSCH in 3GPP) as shown in FIG. 7! That's a little.
- a high-speed downlink shared channel for example, HS-DSCH in 3GPP
- the downlink user data is transmitted mainly using the downlink shared channel.
- the dedicated physical channel is a bidirectional channel that is individually allocated to each mobile station that performs communication using the downlink shared channel
- the uplink dedicated physical channel includes pilot symbols and downlink dedicated channels in addition to user data. Transmits a transmission power control command for a physical channel, downlink quality information for use in scheduling a shared channel or applying an applied modulation code, and the like, and a downlink dedicated physical channel is used for transmission power control for an uplink dedicated physical channel. Transmits commands and the like.
- FIG. 8 shows a frame format of an uplink dedicated physical channel in the mobile communication system according to the present embodiment.
- the dedicated physical channel is configured to be transmitted in a predetermined TTI unit or in a ⁇ unit set by layer 3! RU
- the dedicated physical channel is divided into units of time called "slots".
- DPDCH dedicated physical control channel
- DPCCH dedicated physical control channel
- HSDPA dedicated physical control for HSDPA It is configured to include a channel (HS-DPCCH).
- E-DPDCH dedicated physical data channel for uplink enhancement
- E-DPDCH dedicated physical control channel for uplink enhancement
- DPDCH, DPCCH, and HS-DPCCH are modulated by BPSK, classified according to spreading codes and phases, and then multiplexed and transmitted as described above.
- the PDCH has the lowest spreading factor (spreading coefficient) (for example, 4), and if the number of bits required for transmitting user data is insufficient, 1 to 5 can be added.
- the spreading factor and the number of spreading multicodes in the DPDCH are dynamically changed according to the transport block size. That is, if the transport block size is large, the spreading factor in the DPDCH is set to be small, and if the number of bits required for transmitting user data is insufficient, multi-code transmission is performed.
- the number of slots for each TTI is set so as to be optimal for a mobile communication system or an application.
- FIG. 9 shows a schematic configuration example of the mobile station UE according to the present embodiment.
- the mobile station UE includes a bus interface unit 11, a call processing control unit 12, a baseband signal processing unit 13, a transmission / reception unit 14, and a transmission / reception antenna 15.
- the mobile station UE may be configured to include a pump unit (not shown).
- FIG. 10 shows functional blocks of the baseband signal processing unit 13.
- the baseband signal processing unit 13 includes an upper layer function unit 131, an RLC function unit 132 functioning as an RLC sublayer, a MAC-d function unit 133, a MAC-e function unit 134, It has a layer 1 functional unit 135 functioning as layer 1.
- the RLC function unit 132 divides the application data (RLC SDU) received from the upper layer function unit 131 into a predetermined PDU size, and arranges the order. By adding an RLC header used for processing, retransmission processing, and the like, an RLC PDU is generated and passed to the MAC-d function unit 133.
- Logical channels are classified according to the contents of data to be transmitted and received.
- one connection can have a plurality of logical channels. That is, data of a plurality of contents (for example, control data and user data, etc.) can be transmitted and received logically in parallel.
- the MAC-d function unit 133 generates a MAC-d PDU by multiplexing logical channels and adding a MAC-d header accompanying the powerful multiplexing. It is assumed that a plurality of MAC-d PDUs are transferred from the MAC-d function unit 133 to the MAC-e function unit 134 as MAC-d flows.
- the MAC-d function unit 133 performs priority control processing, transmission power measurement processing, and transmission rate of uplink user data so that the transmission power of uplink user data does not exceed the maximum allowable transmission power of the mobile station. And the like for controlling
- the MAC-e function unit 134 generates a transport block by combining a plurality of MAC-d PDUs received from the MAC-d function unit 133 as a MAC-d flow and adding a MAC-e header. Then, the generated transport block is passed to the layer 1 functional unit 135 via the transport channel.
- the MAC-e function unit 134 functions as a lower layer of the MAC-d function unit 133, and performs a retransmission control function using hybrid ARQ (HARQ) and a transmission rate control function. .
- HARQ hybrid ARQ
- the MAC-e function unit 134 includes a multiplexing unit 134a, an E-TFC selecting unit 134b, and a HARQ processing unit 134c.
- the multiplexing unit 134a receives the uplink user received as a MAC-d flow from the MAC-d function unit 133 based on the E-TFI (Enhanced-Transport Format Indicator) notified from the E-TFC selection unit 134b. It is configured to perform multiplexing processing on data, generate uplink user data (transport block) to be transmitted via a transport channel (E-DCH), and transmit the generated data to the HARQ processing unit 134c. hand! RU
- uplink user data received as the MAC-d flow is referred to as “uplink user data (MAC).
- uplink user data E-DCH
- E-TFI is an identifier of a transport format that is a format for supplying a transport block for each TTI on a transport channel (E-DCH), and is added to the MAC-e header described above. Things.
- multiplexing section 134a determines the uplink transmission data block size to be applied to the upward user data based on the E-TFI notified from E-TFC selection section 134b, and sends it to HARQ processing section 134c. Be configured to notify! RU
- the multiplexing unit 134a selects an E-TFC selection for selecting a transport format for the uplink user data.
- the information is configured to be notified to the E-TFC selection unit 134b!
- the E-TFC selection information corresponds to the data size, priority class, and the like of uplink user data.
- the HARQ processing unit 134c based on the Ack / Nack for uplink user data notified from the layer 1 functional unit 135 by the N-channel stop undo (N-SAW) protocol, It is configured to perform retransmission control processing according to E-DCH).
- N-SAW N-channel stop undo
- FIG. 13 shows an operation example of the 4-channel stop undo protocol.
- HARQ processing section 134c transmits uplink user data (E-DCH) received from multiplexing section 134a and HARQ information (for example, a retransmission number or the like) used for HARQ processing to layer 1 functional section 135. It is configured to be sent to
- E-DCH uplink user data
- HARQ information for example, a retransmission number or the like
- the E-TFC selection unit 134b selects the transport format (E-TF) to be applied to the uplink user data (E-DCH), thereby changing the transmission rate (transmission data block size) of the uplink user data. It is configured to decide.
- E-TFC selecting section 134b transmits scheduling information (for example, the maximum permissible transmission rate of the base station) that also received the radio base station NodeB power, and MAC-d passed from MAC-d function section 133.
- d PDU data volume data size of uplink user data
- MAC-e function Based on the state of the hardware resources of the radio base station NodeB managed by the unit 134, transmission execution or transmission stop of the uplink user data is determined, and furthermore, the transport applied to the transmission of the uplink user data is determined.
- the E-TFC selection unit 134b associates the “rate level” with the “current transmission rate (kbps)” with the “next maximum allowable transmission rate (kbps)”. It is configured to manage the “rule for increasing the transmission speed of user data”.
- the maximum allowable transmission rate (next maximum allowable transmission rate) of uplink user data that can be transmitted at the next timing (TTI) is assigned to the mobile station UE belonging to each speed level. Being done.
- the powerful increase rule may be generated at a predetermined timing by the radio network controller RNC, or may be fixed in the mobile communication system.
- E-TFC selection section 134b refers to the above-described increase rule, and refers to the "next maximum allowable transmission rate" associated with the current transmission rate of the uplink user data transmitted by the mobile station UE. Is extracted, and the extracted “next maximum allowable transmission rate” is set as the transmission rate of uplink user data in the next TTI.
- the transmission rate of uplink user data is increased unless uplink user data to be transmitted accumulated in mobile station UE becomes empty.
- E-TFC selection section 134b starts transmission of uplink user data at the initial transmission rate reported from the network or at the previously reported initial transmission rate, and determines a predetermined increase rule ( Based on FIG. 14), the transmission rate of the uplink user data is increased to a predetermined transmission rate (for example, the maximum permissible transmission rate of the base station).
- a predetermined transmission rate for example, the maximum permissible transmission rate of the base station.
- the transmission rate of uplink user data increases from “32 kbps”. It is also conceivable that it may vary depending on the parameters of the communication system and the type of the mobile station UE.
- the timing at which the transmission rate of the uplink user data is changed may be every TTI, may be the timing at which the N-SAW in HARQ has been completed, or may be at the mobile station UE. This may be just after receiving the acknowledgment signal (ACK) for the uplink user data from the wireless base station NodeB.
- ACK acknowledgment signal
- the timing at which the N-SAW in HARQ goes round is the timing at which TTIs # 1 to # 4 are transmitted in the example of FIG.
- the mobile station UE transmitting uplink user data gradually increases the transmission rate of the uplink user data, the amount of uplink interference may increase.
- the radio base station NodeB sets the maximum allowable transmission rate of the uplink user data (for example, one or more TTIs) at each predetermined timing (for example, one or more TTIs). (Transmission rate) and may be configured to be broadcast by the downlink shared channel.
- the radio base station NodeB sets the uplink interference amount as close as possible to the maximum allowable interference amount, thereby reducing the cell radius (the distance of the mobile station UE at which the radio base station NodeB can receive the uplink user data). Control may be performed so as to increase the wireless capacity of the entire cell as much as possible while preventing the decrease.
- the radio base station NodeB may determine and notify a coefficient for calculating the maximum allowable transmission rate instead of the maximum allowable transmission rate of uplink user data.
- the mobile station UE determines the maximum uplink user data in its own station from the above-mentioned coefficient. Determine the permissible transmission speed.
- high throughput can be obtained by changing the maximum allowable transmission rate of uplink user data depending on the quality or fluctuation of the propagation path of each mobile station UE.
- the radio base station NodeB calculates the above-described base station maximum allowable transmission rate or a coefficient for calculating the base station maximum allowable transmission rate for the entire cell managed by the radio base station NodeB. It is configured to notify you.
- the E-TFC selection section 134b transmits the uplink user data. It is configured to reduce the rate to the base station maximum allowable transmission rate.
- the radio base station NodeB does not control the transmission rate of uplink user data, but controls the transmission power or transmission power ratio of uplink user data.
- the E-TFC selector 134b is configured to reduce the transmission power and transmission power ratio of uplink user data to the maximum allowable transmission power and the maximum allowable transmission power ratio.
- the transmission rate of uplink user data may be limited at a transmission rate lower than 1536 kbps shown in FIG.
- the first rule is that after uplink user data is in a transmission stop state, if uplink user data to be transmitted again occurs, a predetermined transmission rate (eg, initial transmission rate) is used.
- a predetermined transmission rate eg, initial transmission rate
- the second rule is that even when uplink user data is in a transmission stop state, if uplink user data to be transmitted again occurs within a predetermined period (speed level holding time T).
- FIG. 16 shows a change in the transmission rate of the uplink user data when the first rule is applied.
- FIG. 17 shows the transmission rate of the uplink user data when the second rule is applied. Shows the transition.
- layer 1 functional section 135 includes transmission channel coding section 135a, physical channel mapping section 135b, E-DPDCH transmitting section 135c, E-DPCCH transmitting section 135d, and E-DPCCH transmitting section 135d. It includes an HICH receiving section 135e, an E-RGCH receiving section 135f, an E-AGCH receiving section 135g, and a physical channel demapping section 135h.
- the transmission channel coding section 135a includes a FEC (Forward Error Collection) coding section 135a1 and a transmission rate matching section 135a2.
- FEC Forward Error Collection
- FEC encoding section 135al performs error correction encoding on uplink user data (E-DCH) transmitted from MAC-e functional section 134, ie, the transport block. Configured to do the processing! Puru.
- E-DCH uplink user data
- the transmission rate matching unit 135a2 applies a “rate (bit repetition)” to the transport block subjected to the error correction coding processing so as to match the transmission capacity of the physical channel. )) And “puncture (bit thinning)”.
- Physical channel mapping section 135b maps uplink user data (E-DCH) from transmission channel coding section 135a to E-DPDCH, and transmits E-TFI and HARQ information from transmission channel coding section 135a to E-DPDCH. -Configured to map to the DPCCH.
- E-DPDCH transmitting section 135c is configured to perform the above-described E-DPDCH transmission processing
- E-DPCCH transmitting section 135d is configured to perform the above-described E-DPCCH transmission processing. It is composed of
- E-HICH receiving section 135e is configured to receive the E-HICH transmitted from radio base station NodeB, and E-RGCH receiving section 135f receives the radio base station NodeB power.
- the E-AGCH receiving unit 135g is configured to receive the E-RGCH, and is configured to receive the transmitted E-AGCH! RU
- the physical channel demapping unit 135h extracts an ACK / NACK for uplink user data included in the E-HICH received by the E-HICH reception unit 135e, and transmits the ACK / NACK to the MAC-e function unit 134. It is composed into!
- physical channel demapping section 135h extracts scheduling information (absolute transmission rate of uplink user data, that is, UP command / DOWN command) included in E-RGCH received by E-RGCH receiving section 135f. Then, it is configured to transmit to the MAC-e function unit 134.
- scheduling information absolute transmission rate of uplink user data, that is, UP command / DOWN command
- physical channel demapping section 135h extracts scheduling information (absolute transmission rate of uplink user data) included in the E-AGCH received by E-AGCH receiving section 135g, and extracts the MAC-e functional section. 134.
- FIG. 21 is a functional block configuration example of the radio base station NodeB according to the present embodiment.
- the radio base station NodeB according to the present embodiment includes an HWY interface 21, a baseband signal processing unit 22, a transmission / reception unit 23, an amplifier unit 24, a call processing control unit 26, a transmission / reception An antenna 25 is provided.
- the HWY interface 21 is configured to receive downlink user data to be transmitted from the radio network controller RNC located above the radio base station NodeB, and to input the downlink user data to the baseband signal processing unit 22. Have been.
- the HWY interface 21 is configured to transmit the uplink user data from the baseband signal processing unit 22 to the radio network controller RNC.
- the baseband signal processing unit 22 After performing layer 1 processing such as channel coding processing and spreading processing on the downlink user data, the baseband signal processing unit 22 transmits the baseband signal including the powerful downlink user data. It is configured to transmit a signal to the transmission / reception unit 23!
- baseband signal processing section 22 performs layer 1 processing such as despreading processing, RAKE combining processing, and error correction decoding processing on the baseband signal from baseband signal processing section 22. After that, the acquired uplink user data is transmitted to the HWY interface 21.
- layer 1 processing such as despreading processing, RAKE combining processing, and error correction decoding processing
- the transmission / reception unit 23 is configured to convert the baseband signal from the baseband signal processing unit 22 into a radio frequency band signal. Further, the transmission / reception unit 23 is configured to convert a radio frequency band signal from the amplifier unit 24 into a baseband signal.
- the amplifier unit 24 is configured to amplify the radio frequency band signal from the transmission / reception unit 23 and transmit the amplified signal via the transmission / reception antenna 25.
- the amplifier unit 24 is configured to amplify a signal received by the transmission / reception antenna 25 and transmit the amplified signal to the transmission / reception unit 23.
- the call processing control unit 26 transmits and receives a call processing control signal to and from the radio network controller RNC, manages the state of each functional unit of the radio base station NodeB, allocates hardware resources by layer 3, and the like. Is configured to do the processing! RU
- FIG. 22 is a functional block diagram of the baseband signal processing unit 22. As shown in FIG. 22, the baseband signal processing unit 22 includes a layer 1 function unit 221 and a MAC-e function unit 222.
- layer 1 functional section 221 includes an E-DPCCH despreading / RAKE combining section 22 la, an E-DPCCH decoding section 221b, an E-DPDCH despreading / RAKE combining section 221c, A buffer 221d, a re-despreading unit 221e, a 1 ⁇ 3 buffer 221 £, an error correction decoding unit 221g, a transmission channel coding unit 221h, a physical mapping unit 221i, an E-HICH transmission unit 221j, An E-AGCH transmission unit 221k and an E-RGCH transmission unit 2211 are provided.
- E-DPCCH despreading 'RAKE section 221a is configured to perform despreading processing and RAKE combining processing on the E-DPCCH!
- E-DPCCH decoding section 221b has an E-TFCI (or E-TFRI: Enhanced) for determining the transmission rate of uplink user data based on the output from E-DPCCH despreading and RAKE section 221a.
- Transport Format ana Resource Indicator is configured to be sent to the MA Ce function section 22c!
- E-DPDCH despreading RAKE combining section 221c despreads the E-DPDCH using a spreading factor (minimum spreading factor) corresponding to the highest rate that E-DPDCH can take and the number of multicodes It is configured to perform processing and accumulate it in the buffer 221d.
- a spreading factor minimum spreading factor
- the re-despreading unit 221e performs a re-despreading process on the data stored in the buffer 221d using the spreading factor and the number of multicodes notified from the MAC-e function unit 222, It is configured to accumulate in the HARQ buffer 221f.
- the error correction decoding unit 221g performs an error correction decoding process on the data stored in the buffer 221d based on the encoding rate notified from the MAC-e function unit 222. It is configured to transmit the acquired uplink user data (E-DCH) to the MAC-e function unit 222.
- E-DCH acquired uplink user data
- Transmission channel coding section 221h is configured to perform necessary coding processing based on the ACK / NACK and scheduling information for uplink user data received from MAC-e function section 222. .
- Physical channel mapping section 221i maps ACK / NACK for uplink user data from transmission channel coding section 22lh to E-HICH, and sets scheduling information (absolute transmission rate) from transmission channel coding section 221h. ) Is mapped to the E-AGCH, and scheduling information (relative transmission rate) from the transmission channel coding unit 221h is mapped to the E-RGCH.
- E-HICH transmitting section 221j is configured to perform the above-described transmission processing for E-HICH, and E-AGCH transmitting section 221k performs the above-described transmission processing for E-AGCH.
- the E-RGCH transmission unit 2211 is configured to perform the transmission process for the E-RGCH described above.
- the MAC-e function unit 222 includes a HARQ processing unit 222a, a reception processing instruction unit 222b, a scheduling unit 222c, and a demultiplexing unit 222d.
- HARQ processing section 222a receives uplink user data (E-DCH) and HARQ information received from layer 1 functional section 221 and performs HARQ processing on the uplink user data (E-DCH). It is configured as follows.
- HARQ processing section 222a is configured to notify ACK / NACK (for uplink user data) indicating the reception processing result of the uplink user data (E-DCH) to layer 1 functional section 221. I have.
- the HARQ processing unit 222a is configured to notify the scheduling unit 222c of ACK / NACK (for uplink user data) for each process.
- the reception processing command section 222b is configured to transmit the spreading factor and the multi-code related to the transport format of each mobile station UE specified by the E-TFCI per ⁇ ⁇ received from the E-DPCCH decoding section 221b of the layer 1 function section 221.
- the number is notified to the re-despreading unit 221e and the HARQ buffer 221f, and the encoding rate is notified to the error correction decoding unit 221g.
- the scheduling unit 222c is configured to perform the E-TFCI for each channel received from the E-DPCCH decoding unit 221b of the layer 1 function unit 221, the ACK / NACK for each process received from the HARQ processing unit 222a, the interference level, and the like. Is configured to change the maximum permissible transmission rate of the base station based on the above.
- the scheduling unit 222c may be configured to reduce the base station maximum allowable transmission rate at a fixed rate when the interference level increases and exceeds a predetermined value.
- scheduling section 222c may be configured to increase the base station maximum allowable transmission rate at a fixed rate when the interference level falls below a predetermined value.
- the scheduling section 222c is configured to notify the layer 1 functional section 221 of the maximum permissible transmission rate of the base station as scheduling information.
- the scheduling unit 222c may be configured to notify the layer 1 function unit 221 of the above-described increase rule as scheduling information!
- the demultiplexing unit 222d converts the uplink user data (EDCH) received from the HARQ processing unit 222a by performing demultiplexing processing on the uplink user data (HW). It is configured to transmit to the Y interface 21.
- EDCH uplink user data
- HW uplink user data
- the radio network controller RNC is a device located above the radio base station NodeB, and is configured to control radio communication between the radio base station NodeB and the mobile station UE. ing.
- the radio network controller RNC includes an exchange interface 31, an LLC layer processing unit 32, a MAC layer processing unit 33, a media signal processing unit 34, It has a wireless base station interface 35 and a call processing control unit 36.
- the exchange interface 31 is an interface with the exchange 1.
- the exchange interface 31 transmits the downlink signal transmitted from the exchange 1 to the LLC layer processing unit 32 and transmits the uplink signal transmitted from the LLC layer processing unit 32 to the exchange 1. It is configured.
- the LLC layer processing unit 32 is configured to perform LLC (Logical Link Control) sub-layer processing such as synthesis processing of a header such as a sequence number or a trailer. After performing the LLC sub-layer processing, the LLC layer processing section 32 transmits the uplink signal to the exchange interface 31 and transmits the downlink signal to the MAC layer processing section 33. It is composed into!
- LLC Logical Link Control
- the MAC layer processing unit 33 is configured to perform a MAC layer process such as a priority control process or a header addition process. After performing the MAC layer processing, the MAC layer processing section 33 transmits the uplink signal to the LLC layer processing section 32 and transmits the downlink signal to the radio base station interface 35 (or the media signal processing section 34). It is configured to
- the media signal processing unit 34 is configured to perform media signal processing on an audio signal or a real-time image signal. After performing the media signal processing, the media signal processing unit 34 is configured to transmit the uplink signal to the MAC layer processing unit 33 and transmit the downlink signal to the radio base station interface 35. Te ru.
- the wireless base station interface 35 is an interface with the wireless base station NodeB.
- the radio base station interface 35 transfers the uplink signal transmitted from the radio base station NodeB to the MAC layer processing unit 33 (or the media signal processing unit 34), and performs MAC layer processing.
- Control unit 33 or media signal processing unit 34
- the call processing control unit 36 is configured to perform radio resource management processing, channel setting and release processing by layer 3 signaling, and the like.
- radio resource management is configured to perform radio resource management processing, channel setting and release processing by layer 3 signaling, and the like.
- the call processing control unit 36 may be configured to generate the above-described increase rule and notify the wireless base station NodeB via the wireless base station interface 35! /.
- the radio base station NodeB transmits an ascending user to the whole cell managed by the radio base station NodeB at one or a plurality of transmission time intervals of uplink user data. It reports the maximum allowable transmission rate of data (base station maximum allowable transmission rate) or a coefficient for calculating the maximum allowable transmission rate (base station maximum allowable transmission rate).
- the radio base station NodeB is configured to periodically broadcast the base station maximum permissible transmission rate or a coefficient for calculating the base station maximum permissible transmission rate. It may be configured to periodically broadcast the base station maximum allowable transmission rate or a coefficient for calculating the base station maximum allowable transmission rate.
- the radio base station NodeB is configured to broadcast a coefficient for calculating the base station maximum allowable transmission rate or the base station maximum allowable transmission rate using the E-AGCH. A little.
- step S 1001 in step S 1002, in the mobile station UE, it is determined whether the uplink user data is in the transmission stop state. Is determined. If the uplink user data is in the transmission stop state, the operation proceeds to step S1003. If the uplink user data is not in the transmission stop state, the operation proceeds to step S1007.
- the predetermined timing refers to the timing immediately after the N-channel stop undo has completed one cycle.
- the transmission time interval of the user data, or the transmission time interval of the uplink user data immediately after the mobile station UE receives the acknowledgment signal (ACK) for the uplink user data of the radio base station NodeB, and the error correction code. And the like.
- step S1003 the mobile station UE acquires the next maximum allowable transmission rate associated with the current transmission rate of uplink user data with reference to the above-described increase rule (see Fig. 14).
- step S1005 If it is determined in step S1004 that the acquired next maximum allowable transmission rate exceeds the base station maximum allowable transmission rate, in step S1005, the mobile station UE follows the acquired next maximum allowable transmission rate. Set the transmission rate of the uplink user data transmitted at the next TTI to a transmission rate that is lower than the maximum permissible transmission rate of the base station.
- step S1004 if it is determined in step S1004 that the acquired next maximum allowable transmission rate exceeds the base station maximum allowable transmission rate, in step S1006, the mobile station UE transmits the uplink to be transmitted at the next TTI. Set the transmission speed of the user data to the acquired next maximum allowable transmission speed.
- step S1007 the speed level holding time T has elapsed since the transmission stop state started.
- step S1008 the mobile station UE does not change the transmission rate applied when uplink user data to be transmitted occurs.
- step S1009 the mobile station UE transmits the h
- the transmission rate applied when uplink user data to be transmitted occurs is reduced by one level (for example, see Fig. 18).
- the mobile station UE autonomously increases the transmission rate of uplink user data based on a predetermined increase rule.
- the throughput on the uplink without increasing the bandwidth capacity can be increased.
- the radio base station NodeB determines whether or not the mobile station UE has an uplink user. It is possible to secure the receiving hardware resources by predicting the data transmission speed, prevent the increase in the size of the radio base station NodeB, and enable the receiving hardware resources (uplink radio resources) in the radio base station NodeB. Can be used for
- the radio base station NodeB determines the next maximum allowable transmission rate in accordance with a predetermined increase rule. Knowing that, the scale, number of components, and buffer capacity of the E-DPDCH despreading RAKE processing unit 221c can be reduced.
- the mobile communication system it is possible to control the transmission rate of uplink user data without using the UP command / DOWN command required in the conventional “Rate Control J”. , Signaling configuration and system operation become symptom.
- the radio base station NodeB controls the transmission rate of uplink user data by transmitting the same UP command / DOWN command to the mobile stations UE in the entire cell area. Avoiding the “unfairness of assignments”.
- the mobile communication system when there is no more uplink user data to be transmitted in the mobile station UE, before resetting the speed level of the mobile station UE, By providing a certain grace period, communication can be continued without lowering the transmission efficiency of the mobile station UE.
- the radio base station NodeB since the radio base station NodeB notifies the mobile station UE of the base station maximum allowable transmission rate, it is possible to make the amount of uplink interference close to a certain value. it can.
- the mobile communication system according to the second embodiment of the present invention as shown in FIG. 28 to FIG. 30, except that the control target is the transmission power of the uplink user data rather than the transmission rate of the uplink user data, This is the same as the mobile communication system according to the first embodiment described above.
- the E-TFC selection unit 134b of the MAC-e function unit 13c defines “transmission power level” instead of “speed level” in FIG. 14, as shown in FIG.
- the mobile station UE is configured to be classified according to the transmission power level.
- the transmission power in this case may be the sum of the transmission powers of all the dedicated physical channels of the mobile station UE, or may be used to send uplink user data to the mobile station UE.
- Channel (E) E
- the mobile station UE calculates the transmission rate of uplink user data that can be transmitted with the transmission power of uplink user data set as described above, and transmits the uplink user data. Configured to perform transmission processing using speed! RU
- the amount of uplink interference (uplink interference power) can be directly controlled, and the control accuracy of the amount of uplink interference is further improved.
- the mobile communication system according to the third embodiment of the present invention is configured as shown in FIGS.
- control target is the transmission power ratio of the uplink user data rather than the transmission rate of the uplink user data.
- the transmission power ratio of uplink user data is the ratio of the enhanced dedicated physical data channel (E-DPDCH) for the uplink user data to the dedicated physical data channel (DPCCH) for the uplink user data. is there.
- E-DPDCH enhanced dedicated physical data channel
- DPCCH dedicated physical data channel
- the E-TFC selection unit 134b of the MAC-e function unit 13c defines a “transmission power ratio level” instead of the “speed level” in FIG. 14, as shown in FIG. And configured to classify each mobile station UE according to a strong transmission power ratio level! Puru.
- the radio base station NodeB is
- Each UE is configured to manage the base station maximum allowable transmission rate, the base station maximum allowable transmission power, or the base station maximum allowable transmission power ratio.
- the radio base station NodeB For example, for each mobile station UE, the radio base station NodeB
- the base station maximum allowable transmission power or the base station maximum allowable transmission power ratio may be configured to be notified as an individual control signal (for example, E-AGCH or E-DPCCH).
- the radio base station NodeB may be configured to assign a higher maximum allowable transmission rate to the mobile station UE having good downlink communication quality.
- the radio base station NodeB transmits the base station maximum permissible transmission rate, base station maximum permissible transmission power, or base station maximum permissible It is configured to manage the transmission power ratio.
- the radio base station NodeB reports the base station maximum allowable transmission rate (or the base station maximum allowable transmission power and the base station maximum allowable transmission power ratio) as individual control signals. Instead, the transmission rate (or transmission power, transmission power ratio) of the uplink user data in each mobile station UE is changed to the base station maximum allowable transmission rate (or base station maximum allowable transmission power, base station maximum allowable transmission power ratio). ) May be configured to transmit a stop signal when the stop signal is reached.
- the base station maximum allowable transmission rate (or base station maximum allowable transmission power, base station maximum allowable transmission power ratio) is determined for each mobile station or priority. Therefore, more precise control of the transmission speed (or transmission power, transmission power ratio) can be performed.
- a transmission rate control method, a transmission power control method, a transmission power control method and a transmission rate control method capable of increasing the throughput in the uplink without suppressing the uplink capacity and the downlink capacity.
- a power ratio control method, a mobile communication system, a mobile station, and a base station can be provided.
- a "cell common rate control method" which is known as a simple transmission rate control method, is realized while minimizing the allocation of hardware resources to the minimum necessary, thereby saving hardware resources and reducing the number of devices. Cost reductions can be achieved.
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Abstract
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US11/629,677 US7813754B2 (en) | 2004-06-17 | 2005-06-17 | Transfer rate control method, transmission power control method, transmission power ratio control method, mobile communication system, mobile station, and radio base station |
CN2005800202017A CN1969586B (zh) | 2004-06-17 | 2005-06-17 | 传输速率控制方法、发送功率控制方法、发送功率比控制方法、移动通信系统、移动台及无线基站 |
JP2006514801A JPWO2005125259A1 (ja) | 2004-06-17 | 2005-06-17 | 伝送速度制御方法、送信電力制御方法、送信電力比制御方法、移動通信システム、移動局及び無線基地局 |
EP05751217A EP1768435A4 (en) | 2004-06-17 | 2005-06-17 | TRANSFER RATE CONTROL METHOD, TRANSMISSION POWER CONTROL METHOD, TRANSMISSION POWER REPORT CONTROL METHOD, MOBILE COMMUNICATION SYSTEM, MOBILE STATION, AND RADIO BASE STATION |
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JP2004180272 | 2004-06-17 | ||
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EP (1) | EP1768435A4 (ja) |
JP (1) | JPWO2005125259A1 (ja) |
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WO (1) | WO2005125259A1 (ja) |
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JP2010233249A (ja) * | 2010-06-16 | 2010-10-14 | Fujitsu Ltd | 無線通信のデータ再送処理方法およびその方法を用いる無線通信装置 |
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Also Published As
Publication number | Publication date |
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TW200611583A (en) | 2006-04-01 |
US7813754B2 (en) | 2010-10-12 |
TWI270306B (en) | 2007-01-01 |
KR100804114B1 (ko) | 2008-02-18 |
JPWO2005125259A1 (ja) | 2008-04-17 |
US20080032725A1 (en) | 2008-02-07 |
CN1969586A (zh) | 2007-05-23 |
EP1768435A4 (en) | 2013-01-09 |
KR20070027599A (ko) | 2007-03-09 |
CN1969586B (zh) | 2011-11-09 |
EP1768435A1 (en) | 2007-03-28 |
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