WO2004062311A1 - 基地局装置および通信端末装置 - Google Patents
基地局装置および通信端末装置 Download PDFInfo
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- WO2004062311A1 WO2004062311A1 PCT/JP2003/016909 JP0316909W WO2004062311A1 WO 2004062311 A1 WO2004062311 A1 WO 2004062311A1 JP 0316909 W JP0316909 W JP 0316909W WO 2004062311 A1 WO2004062311 A1 WO 2004062311A1
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- transmission
- base station
- communication terminal
- soft handover
- transmission rate
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- 238000004891 communication Methods 0.000 title claims abstract description 149
- 230000005540 biological transmission Effects 0.000 claims abstract description 425
- 238000000034 method Methods 0.000 abstract description 19
- 238000011144 upstream manufacturing Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 46
- 238000000605 extraction Methods 0.000 description 15
- 108010003272 Hyaluronate lyase Proteins 0.000 description 14
- 230000007480 spreading Effects 0.000 description 10
- 230000008859 change Effects 0.000 description 7
- 239000000284 extract Substances 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
Definitions
- the present invention relates to a base station device and a communication terminal device.
- HSDP A High-Speed Downlink Packet Access
- a technique for transmitting bucket data at high speed in a downlink for example, Japanese Patent Laid-Open No. 2000-151623, supervised by Keiji Tachikawa
- one physical channel is shared and used by a plurality of mobile stations by time division. For this reason, the base station determines to which mobile station the information is to be transmitted at a certain point in time (generally called "scheduling"). Scheduling is performed based on, for example, the amount of data transmitted from the base station to the mobile station, the allowable delay time, and the communication quality.
- Scheduling information (data transmission permission) determined by the base station and its The transmission parameters (transmission rate) at this time are transmitted to each mobile station in communication, and each mobile station transmits packet data to the base station based on the transmitted scheduling information and transmission parameters. . That is, as shown in Fig. 1, base station C transmits data transmission permission and transmission parameters to mobile stations A and B in its own cell based on the assignment result, and base stations C and B Transmits according to the data transmission permission and transmission parameters transmitted from base station C.
- An object of the present invention is to provide a base station apparatus and a communication terminal apparatus capable of estimating interference from other cells in an uplink and enabling optimal allocation.
- a base station apparatus includes: an allocating unit that determines scheduling and a transmission parameter for a communication terminal device in its own cell; a transmitting unit that transmits an allocation result of the allocating unit; And the allocating means does not individually allocate to the communication terminal devices in the soft handover state among the communication terminal devices in the own cell.
- a communication terminal device includes: an obtaining unit that obtains an allocation result from a base station device; and a transmitting unit that performs transmission at an allocated scheduling and transmission rate according to the obtained allocation result. And the transmitting unit performs continuous transmission at a predetermined transmission rate when the own communication terminal device is in a soft handover state.
- FIG. 1 is a diagram for explaining operations of a conventional base station device and a communication terminal device.
- FIG. 2 is a block diagram showing a configuration of a main part of the base station device according to Embodiment 1 of the present invention.
- FIG. 3 is a block diagram showing a configuration of a main part of the communication terminal device according to Embodiment 1 of the present invention.
- FIG. 4 is a configuration diagram of a wireless communication system including an RNC,
- FIG. 5 is a diagram for explaining operations of the base station device and the communication terminal device according to Embodiment 1.
- FIG. 6 is a block diagram showing a configuration of a main part of a modification of the base station apparatus according to Embodiment 1 of the present invention.
- FIG. 1 A first figure.
- Figure 7B is a diagram showing a case where the mobile station can select the transmission parameters up to the transmission parameters selected by the base station,
- FIG. 8A is a diagram illustrating a case where a mobile station transmits at a predetermined transmission rate (or lower) when the base station does not perform individual assignment
- Figure 8B shows a case in which the base station does not perform individual assignment and transmits at the same transmission rate as before (or lower), and Figure 9 shows that during soft handover, A diagram showing a case where the received assignment information is not used,
- FIG. 10 is a diagram showing a case where allocation information reception processing is not performed during soft handover.
- FIG. 11 is a block diagram showing a configuration of a main part of a modification of the mobile station according to the present embodiment
- FIG. 12 is a diagram showing a configuration of a main part of another modification of the mobile station according to the present embodiment. Lock diagram,
- FIG. 13 is a block diagram showing a configuration of a main part of a base station apparatus according to Embodiment 2 of the present invention.
- FIG. 14 is a block diagram showing a configuration of a main part of a communication terminal device according to Embodiment 2 of the present invention.
- FIG. 15 is a diagram for explaining operations of the base station device and the communication terminal device according to Embodiment 2.
- FIG. 16 is a block diagram showing a configuration of a main part of a base station apparatus according to Embodiment 3 of the present invention.
- FIG. 17 is a block diagram showing a configuration of a main part of a communication terminal apparatus according to Embodiment 3 of the present invention.
- FIG. 18A is a diagram for explaining an example of the operation of the base station device and the communication terminal device according to Embodiment 3.
- FIG. 18B is a diagram for explaining another example of the operation of the base station device and the communication terminal device according to Embodiment 3.
- FIG. 18C is a diagram for explaining still another example of the operation of the base station device and the communication terminal device according to Embodiment 3.
- Figure 19A shows a normal case where there is no limit on the controllable range of the transmission rate.
- Figure 19B is a diagram showing the case of soft handover where the controllable range of the transmission rate is limited.
- FIG. 20 is a block diagram showing a configuration of a main part of a base station apparatus according to Embodiment 4 of the present invention.
- FIG. 21 is a block diagram showing a configuration of a main part of a communication terminal apparatus according to Embodiment 4 of the present invention.
- FIG. 22A is a diagram for explaining the operation of the base station apparatus and the communication terminal apparatus according to Embodiment 4 when the amount of interference is small
- FIG. 22B is a diagram for explaining the operation when the amount of interference is large
- FIG. 23 is a diagram for explaining operations of the RNC, the base station device, and the communication terminal device according to Embodiment 5.
- FIG. 24 is a diagram illustrating an example of an operation mode of the RNC according to the fifth embodiment
- FIG. 25 is a diagram illustrating another example of an operation mode of the RNC according to the fifth embodiment
- FIG. 26B is a diagram showing a case where one base station allocates and multiple base stations receive.
- FIG. 26C is a diagram illustrating a case where a plurality of base stations allocate and receive a plurality of base stations.
- the gist of the present invention is that, in a high-speed packet transmission method in the uplink, the base station apparatus does not individually allocate to a communication terminal apparatus in a soft handover state or a state where interference with other cells is large, or By constantly assigning, or by switching to another channel capable of continuous transmission, the communication terminal apparatus is made to perform continuous transmission at a constant transmission rate.
- the goal is to enable interference estimation and optimal allocation.
- base station device is simply called “base station” and the communication terminal device is called “mobile station”.
- FIG. 2 is a block diagram showing a configuration of a main part of base station apparatus (base station) 100 according to Embodiment 1 of the present invention.
- the base station 100 shown in FIG. 2 is a mobile station that can transmit from mobile stations in its own cell. And a transmission rate (for example, coding rate, modulation scheme, spreading factor, transmission power, etc.), and has the function of allocating.
- the despreading unit 105, demodulation unit 107, channel coding unit 109, 115, modulation unit 117, And a plurality of diffusion units 119 are provided.
- a feature of this embodiment is that soft handover (SHO) information is input to a scheduling / transmission parameter determination unit 113 from an upper layer (for example, RNC (Radio Network Controller)), and the soft handover information is included in the soft handover information.
- the assignment control is performed based on this.
- the soft handover information is information indicating which mobile station in the own cell is in a soft handover state. The details of the assignment control will be described later.
- the scheduling information is information on mobile stations that can be transmitted determined from mobile stations in the own cell at the time of allocation, that is, information on data transmission permission, and the transmission parameters are transmission rates determined at the time of allocation. Information (coding rate, modulation scheme, spreading factor, transmission power, etc.).
- the scheduling information and the transmission parameters are collectively referred to as “assignment information”.
- FIG. 3 is a block diagram showing a configuration of a main part of communication terminal apparatus (mobile station) 150 according to Embodiment 1 of the present invention.
- the mobile station 150 shown in FIG. 3 has a function of transmitting data in accordance with the assigned transmission rate (coding rate, modulation scheme, spreading factor, transmission power, etc.).
- soft handover information is input from a higher layer to the scheduling information / transmission parameter extraction unit 16 1 and the report information generation unit 16 3, and scheduling information and transmission parameters are input based on the soft handover information. And whether to generate predetermined report information.
- the soft handover information is information indicating that the own mobile station is in a soft handover state. The details of the control will be described later.
- Base station 100 receives a signal wirelessly transmitted from each mobile station with antenna 101, and outputs the signal to receiving radio section 103.
- reception radio section 103 performs predetermined radio processing such as down-comparison on the signal received by the antenna 101.
- the output signal (baseband signal) of reception radio section 103 is output to despreading section 105.
- the despreading section 105 despreads the received signal using a spreading code unique to each user (mobile station), and then the demodulation section 107 demodulates the despread received signal.
- the demodulated received signal is output to channel coding section 109.
- channel coding section 109 decodes the demodulated received signal, obtains received data from each user (mobile station), and outputs it to report value extracting section 111.
- the report value extracting unit 111 extracts a predetermined report value (for example, CQI, etc.) required for the allocation process from the data received from each mobile station.
- the extracted report values are output to the scheduling / transmission parameter determination unit 113. Is forced.
- the scheduling / transmission parameter determination unit 113 determines scheduling and transmission parameters using the extracted report values. That is, the mobile station that can transmit from the mobile stations in its own cell and the transmission rate (for example, coding rate, modulation scheme, spreading factor, transmission power) are determined. The determined assignment information is output to channel coding section 115.
- the transmission rate for example, coding rate, modulation scheme, spreading factor, transmission power
- the scheduling Z transmission parameter determination unit 113 receives soft handover information from an upper layer, and the scheduling Z transmission parameter determination unit 113 receives the soft handover information.
- the above-described normal assignment processing is not performed on the mobile station in the over state.
- the mobile station performs continuous transmission at a fixed transmission rate (coding rate, modulation scheme, spreading factor, transmission power) when there is data to be transmitted, as described later.
- a signal (soft handover end information) indicating the end of the soft handover state is input from the upper layer, and the operation mode (hereinafter referred to as “continuous transmission mode”) is input. ) Is canceled to shift to the normal operation mode (hereinafter referred to as “assigned transmission mode”).
- the soft handover information and the soft handover end information input to the scheduling transmission parameter determining unit 113 are supplied from the RNC 180, for example, as shown in FIG.
- the RNC 180 is connected to a plurality of base stations (BTS: Base Station Transceiver Subsystem), and performs outgoing / incoming connection control, call termination control, handover control, and the like for the plurality of BTSs. Has a function.
- BTS Base Station Transceiver Subsystem
- the method of releasing the continuous transmission mode is not limited to the above example.
- soft handover information is periodically supplied as long as the system is in the soft hand state
- if soft handover information is not supplied for a predetermined period of time In this case, it is possible to cancel the continuous transmission mode and shift to the normal assigned transmission mode.
- the channel coding section 115 encodes the transmission data including the allocation information from the scheduling Z transmission parameter determination section 113, and then modulates the transmission data.
- the encoded transmission data is modulated.
- the modulated transmission data is output to spreading section 119.
- the spreading section 119 spreads the modulated transmission data using a spreading code unique to each user (mobile station).
- the spread transmission data is output to the transmission radio section 121, where it is subjected to predetermined radio processing such as up-conversion, and then transmitted wirelessly from the antenna 101.
- the mobile station 150 receives the signal wirelessly transmitted from the base station with the antenna 151, and outputs the signal to the reception radio section 153.
- reception radio section 153 performs predetermined radio processing such as down-conversion on the signal received by antenna 153.
- the output signal (baseband signal) of reception radio section 153 is output to despreading section 155.
- despreading section 155 despreads the received signal using the same spreading code as used for transmission, and demodulation section 157 demodulates the despread received signal.
- the demodulated received signal is output to channel coding section 159.
- channel coding section 159 decodes the demodulated received signal to obtain received data from the base station and outputs it to scheduling information transmission parameter extracting section 161.
- the scheduling information / transmission parameter extraction section 161 extracts scheduling information and transmission parameters (coding rate, modulation scheme, spreading factor, transmission power) from the data received from the base station.
- the extracted scheduling information is output to the buffer 165.
- the extracted transmission parameters are That is, the signals are output to the modulation section 169, the channel coding section 167, the spreading section 171 and the transmission radio section 173 in the order of the above parameters.
- the scheduling information / transmission parameter extracting unit 16 1 receives soft handover information (and soft handover end information) from an upper layer, and transmits the scheduling information.
- the parameter extracting section 161 does not extract the scheduling information and transmission parameters when the mobile station is in the soft handover state.
- the mobile station 150 controls the sections 165 to 173 so as to perform continuous transmission at a fixed transmission rate (modulation scheme, coding rate, spreading factor, transmission power).
- the fixed transmission rate is preferably a low transmission rate, more specifically, for example, the lowest transmission rate among available transmission rates. In this way, by setting a low transmission rate (for example, the lowest transmission rate), interference with other cells can be reduced, and the base station does not needlessly estimate interference from other cells. It is possible to make optimal assignments to mobile stations in the own cell.
- the report information generating section 163 inputs the line quality information and generates information (for example, CQI) to be reported to the base station for allocation.
- the generated report information (report value) is output to channel coding section 167.
- soft handover information (and soft handover end information) is input to the report information generation unit 163 from the upper layer, and the report information generation unit 163 When the own mobile station is in the soft handover state, it does not generate report information.
- the buffer 165 temporarily stores the input transmission data and, based on the scheduling information from the scheduling information Z transmission parameter extraction unit 161, converts the held transmission data to the channel coding unit 166. Output to 7. However, if the own mobile station is in the soft handover state, it is connected as described above. Data is output continuously to perform continuous transmission.
- the channel coding section 167 Based on the transmission rate (particularly the coding rate) from the scheduling information / transmission parameter extraction section 161, the channel coding section 167 generates the transmission data from the buffer 165 and the report information generation section 16.
- the modulator 169 After encoding the report information (CQI, etc.) from 3, the modulator 169 sequentially encodes the information based on the transmission information (particularly the modulation method) from the scheduling information // transmission parameter extractor 161.
- the coded information is modulated, and the spreading section 171 uses the unique spreading code based on the transmission rate (particularly the spreading factor) from the scheduling information transmission parameter extraction section 161 to perform modulation.
- Spread information The spread information is output to the transmission radio section 173.
- predetermined information such as up-conversion is used.
- radio transmission is performed from antenna 15 1.
- the own mobile station is in the soft handover state, it is controlled to a fixed transmission rate (coding rate, modulation scheme, spreading factor, transmission power) as described above.
- the base station when a mobile station enters a soft handover state, the base station does not individually allocate the mobile station to other mobile stations, and the mobile station transmits data to be transmitted. If there is, perform continuous transmission at a fixed transmission rate. That is, normally, the mobile station receives the allocation information from the base station, and if assigned, transmits data according to the allocation information. However, during soft handover, the mobile station may not receive this allocation information. Instead, continuous transmission is performed at a constant transmission rate. As a result, since the base station of another cell can always receive the signal from the mobile station during soft handover, it can recognize it and estimate the received power and the interference to other mobile stations. Optimum assignment can be performed.
- base station C sends data transmission permission and transmission parameters to mobile station A, and enters a soft handover state. No assignment information is sent to mobile station B.
- Base station D also does not send assignment information to mobile station B. Also, the mobile station does not transmit report information (such as CQI).
- mobile station A performs transmission according to the data transmission permission and transmission parameters sent from base station C, but mobile station B transmits during soft handover. Continuous transmission is performed according to certain transmission parameters for transmission.
- the base station when a mobile station enters a soft handover state, the base station does not individually allocate the mobile station, and the mobile station performs continuous transmission at a constant transmission rate. Therefore, in the uplink, fluctuations in the amount of interference with other cells can be reduced, and when allocation is performed, interference from other cells can be estimated and optimal allocation can be performed. . Also, by making all the base stations connected by soft handover known at the time of allocation that transmission will be performed, it becomes possible to estimate the amount of interference at that time and to perform allocation.
- soft handover (SHO) information has been described as being obtained from an upper layer (for example, RNC in the case of a base station).
- the communication may be performed with the base station, and the above control may be performed using this signal.
- such a signal is generated in the mobile station and transmitted to the base station with the scheduling parameter transmission parameter determination unit in the base station as the destination.
- the base station (and the scheduling / transmission parameter determining unit in the base station) can directly and easily know from the signal from the mobile station that the mobile station is in the soft handover state. Therefore, for example, as shown in FIG. 6, the base station 100a includes an SHO information extracting unit 123.
- the SHO information extraction unit 123 extracts soft handover (SHO) information from the data received from each mobile station.
- the extracted soft handover information is output to scheduling / transmission parameter determination section 113.
- the mobile station normally transmits report information such as channel quality related information (CQI) to the base station, and suspends reporting such as CQI when it enters a soft handover state. Do not do) force Of course, this is optional.
- CQI channel quality related information
- transmission power control be performed during transmission. As a result, the reception performance of the base station apparatus can be ensured.
- the mobile station performs transmission in accordance with the transmission rate determined by the base station, but it is not necessary to perform transmission at the allocated transmission rate itself. It is also possible to perform transmission by appropriately selecting a transmission rate lower than that. That is, not only when the transmission parameters selected by the base station are used as the transmission parameters of the mobile station as shown in Fig. 7A, but also as shown in Fig. 7B, the base station specifies the upper limit of the transmission rate. In other words, it is also possible to select a transmission parameter as the upper limit value, and the mobile station can perform transmission by setting the specified transmission rate as the upper limit and selecting a transmission rate lower than the specified transmission rate for its own convenience.
- the mobile station can specify the transmission rate according to its own transmission power ⁇ data amount in the buffer even if transmission at the specified transmission rate is not possible. It is possible to transmit at a transmission rate less than or equal to the transmission rate. For example, even if the base station fixes a certain transmission rate as an upper limit in the soft handover state, the mobile station can select a transmission rate within a smaller range. For example, if parameter 3 is the upper limit during soft handover, the mobile station can also transmit with parameter 2. You.
- the mobile station when the base station does not perform individual assignment, the mobile station transmits at a predetermined transmission rate (or lower), but the transmission rate that has been transmitted so far remains unchanged (or It is also possible to send below. In other words, since individual assignment is not performed, the transmission rate that has been transmitted so far is left as specified.
- a predetermined transmission rate or lower
- FIG. 8A S110
- 0 it is also possible to transmit at the same transmission rate (or lower) used immediately before entering the soft handover state (S1200), as shown in Fig. 8B. .
- the base station in another cell can easily estimate the amount of interference given to the signal from the mobile station in its own cell. And efficient allocation can be achieved.
- allocation information (scheduling information and transmission parameters) is not extracted, that is, it is not used even if it is received, or allocation information is received. No, that is, it is possible not to perform the receiving process itself.
- allocation information from the base station is received (S20000), and when not in the soft handover state (S2100: NO), the allocation information is received.
- transmission is performed at the transmission rate (or lower) used immediately before entering the soft handover state, instead of transmitting at the predetermined transmission rate (or lower). You may do so.
- the latter case as shown in FIG.
- step S3400 when the mobile terminal is not in the soft handover state (S300: 0: NO), it receives allocation information from the base station (S310), and The transmission is performed at the transmission rate (or lower) indicated in the information (S3200), and when in the soft handover state (S30000: YES), the reception processing of the allocation information is performed. Without transmitting (S340), transmission is performed at a predetermined transmission rate (or lower) (S340). In step S3400, instead of transmitting at a predetermined transmission rate (or lower), transmission is performed at the transmission rate (or lower) used immediately before entering the soft handover state. You may do it.
- FIG. 11 is a block diagram showing a configuration of a main part of a modification of the mobile station according to the present embodiment.
- the mobile station 150a performs the above function, that is, the function of determining the transmission rate by itself up to the specified transmission rate, and the transmission rate that has been transmitted so far when individual assignment is not performed. It has a function to transmit as it is (or lower), and a function to transmit at a predetermined transmission rate (or lower) without using any allocation information even during soft handover. For this reason, the mobile station 150a includes a transmission parameter determination unit 175.
- the transmission parameter deciding unit 175 uses the transmission parameter (transmission rate) input from the scheduling information communication parameter extracting unit 161 b as the upper limit, and reports the available power information (obtained from the transmitting radio unit 173) and transmission.
- the transmittable transmission parameters (transmission rate) are determined from the buffer information (obtained from the transmission buffer 165).
- SHO soft handover
- the scheduling parameter information transmission parameter extraction unit 16 1 b does not extract the allocation information from the soft handover (SHO) information. That information can not be used.
- FIG. 12 is a block diagram showing a configuration of a main part of another modification of the mobile station according to the present embodiment.
- the mobile station 15 Ob has transmitted the above functions, that is, the function of determining the transmission rate by itself up to the specified transmission rate and the case where individual assignment is not performed.
- the reception processing of the allocation information is performed during soft handover. It has a function to transmit at a predetermined transmission rate (or lower) without performing.
- the mobile station 15 Ob inputs soft handover (SHO) information to the despreading unit 1505 a, demodulation unit 157 a, and channel coding unit 159 a, thereby assigning the allocation information. It is possible to control not to perform reception processing. When the reception processing is not performed in this way, the processing amount can be reduced, and the power consumption can be suppressed.
- SHO soft handover
- FIG. 13 is a block diagram showing a configuration of a main part of base station apparatus (base station) 200 according to Embodiment 2 of the present invention
- FIG. 14 is a block diagram showing an example of Embodiment 2 of the present invention
- FIG. 2 is a block diagram showing a configuration of a main part of a communication terminal device (mobile station) 250.
- the base station 200 shown in FIG. 13 has the same basic configuration as the base station 100 shown in FIG. 2, and the same components are denoted by the same reference numerals. Is omitted.
- the mobile station 250 shown in FIG. 14 has the same basic configuration as the mobile station 150 shown in FIG. 3, and the same components are denoted by the same reference numerals and the description thereof will be omitted. Is omitted.
- Embodiment 1 when the base station and the mobile station enter the soft handover state, they recognize that both are in the soft handover state (see SHO information in FIGS. 2 and 3).
- the mobile station operates according to the normal mode. Therefore, the base station 2 0 0 scheduling / / transmission parameter determining section 2 0 1, soft Allocate to the mobile station in the handover state every time, and always assign the same transmission rate (eg, modulation scheme, coding rate, spreading factor, transmission power).
- the base station 2 0 0 scheduling / / transmission parameter determining section 2 0 soft Allocate to the mobile station in the handover state every time, and always assign the same transmission rate (eg, modulation scheme, coding rate, spreading factor, transmission power).
- the soft handover information is not input to any of the scheduling information transmission parameter extraction unit 161a and the report information generation unit 163a.
- a control signal to that effect may be transmitted from the base station 200.
- base station C sends data transmission permission and transmission parameters to mobile station A, and transmits to mobile station B that has entered a soft handover state.
- allocation information is always transmitted so that transmission is always performed at a constant transmission rate.
- the base station D Similar to the base station C, the base station D always transmits the allocation information to the mobile station B so that the mobile station B is always transmitted at a constant transmission rate.
- the mobile station does not transmit report information (such as CQI).
- mobile station A performs transmission in accordance with the data transmission permission and transmission parameters sent from base station C, but mobile station B transmits base station C and D allocation information. As a result, continuous transmission is performed at a constant transmission rate.
- the base station when a mobile station enters the soft handover state, the base station always allocates to the mobile station at a constant transmission rate, and the mobile station assigns the mobile station at a constant transmission rate. Continuous transmission enables estimation of interference from other cells in the uplink, allowing optimal allocation Can be
- FIG. 16 is a block diagram showing a configuration of a main part of base station apparatus (base station) 300 according to Embodiment 3 of the present invention
- FIG. 17 is a block diagram according to Embodiment 3 of the present invention
- FIG. 3 is a block diagram illustrating a configuration of a main part of a communication terminal device (mobile station) 350.
- the base station 300 shown in FIG. 16 has the same basic configuration as the base station 200 shown in FIG. 13, and the same components are denoted by the same reference numerals. The explanation is omitted.
- the mobile station 350 shown in FIG. 17 has the same basic configuration as the mobile station 250 shown in FIG. 14, and the same components are denoted by the same reference numerals. The explanation is omitted.
- a feature of the present embodiment is that transmission parameters (for example, a coding rate, a modulation scheme, a spreading factor, a transmission power, and the like) used in a soft handover state can be changed. Specifically, for example, if all base stations in the active set (that is, base stations involved in soft handover) have instructed to increase the transmission rate by increasing the transmission power, for example, According to the instruction, the transmission rate can be increased by increasing the transmission power. Also, when at least one of the base stations in the active set instructs to reduce the transmission rate, the mobile station can reduce the transmission rate according to the instruction. As a result, interference with other cells can be reduced.
- the instruction is included, for example, in the assignment information. For this reason, base station 300 has transmission rate instruction section 301, and mobile station 350 has transmission rate control section 351.
- the transmission rate instructing unit 301 is a scheduling parameter determining unit. It receives allocation information and soft handover information from 201 and generates a signal indicating the transmission rate to the mobile station during soft handover. The generated instruction signal is output to channel coding section 115.
- the transmission rate control unit 351 receives the transmission parameters and the instruction signal from the base station in the active set from the scheduling information Z transmission parameter extraction unit 161a, and transmits the transmission parameters (codes) in accordance with a predetermined logic. , Modulation scheme, spreading factor, transmission power), and instruct each part 167-17.33.
- base station C notifies mobile station B in soft handover that the transmission rate can be increased, and base station D maintains the transmission rate. When notified, the mobile station B transmits without changing the transmission rate.
- pattern 2 as shown in Figure 18B, base station C notifies mobile station B during soft handover that transmission rate can be increased, and base station D can also increase transmission rate. When notified, mobile station B increases the transmission rate and transmits.
- base station C notifies mobile station B during soft handover that the transmission rate can be increased or maintained, and base station D changes the transmission rate.
- the mobile station B transmits at a reduced transmission rate.
- the base station rejects whether or not the transmission rate can be changed, and the mobile station is based on the determination result from each base station. Since the transmission rate is changed based on the allocation information, the transmission rate can be changed according to the line condition, and interference with other cells can be reduced.
- the base station is configured to transmit a transmission rate increase / decrease instruction based on the result of determining whether or not the transmission rate can be changed, included in the allocation information, and transmitted. It is also possible to change the transmission rate based on the result of determining whether the transmission rate can be changed and to directly transmit the result of this change as a new transmission parameter.
- the present embodiment can be applied to not only the case of continuous transmission during soft handover but also to a communication system in which continuous transmission is always performed.
- the base station can control the change of the transmission rate, but it is also possible to limit the controllable range. Specifically, for example, if there are 10 levels available for the transmission rate, normally there is no limit to the controllable range as shown in Fig. 19A, and control is possible up to parameter 10 However, at the time of soft handover (SHO), as shown in Fig. 19B, the transmission rate is limited so that, for example, only a maximum of parameter 4 can be controlled. If other base stations understand such restrictions (for example, only a parameter 4 can be raised during soft handover), then it is possible to estimate interference. In this case, the transmission rate specified by the base station (or its upper limit) is limited, and the base station must assign a transmission rate (or its upper limit) from among them.
- SHO soft handover
- a plurality of base stations allow a mobile station in soft handover (SHO) to change the transmission rate, and a plurality of base stations perform reception.
- SHO soft handover
- one base station may allow a change in the transmission rate and one or more base stations may receive. That is, one base station may perform transmission control.
- FIG. 20 is a block diagram showing a configuration of a main part of base station apparatus (base station) 400 according to Embodiment 4 of the present invention
- FIG. 21 is a block diagram showing an example of Embodiment 4 of the present invention
- FIG. 2 is a block diagram illustrating a configuration of a main part of a communication terminal device (mobile station) 450.
- the base station 400 shown in FIG. 20 has the same basic configuration as the base station 100 shown in FIG. 2, and the same components are denoted by the same reference numerals. Is omitted.
- the mobile station 450 shown in FIG. 21 has the same basic configuration as the mobile station 150 shown in FIG. 3, and the same components are denoted by the same reference numerals, and description thereof will be omitted. Is omitted.
- the feature of the present embodiment is that, in Embodiment 1, switching to continuous transmission is performed based on soft handover information, but here, other information other than soft handover information is used. Switching to continuous transmission is based on the indication of the possibility of interference with other cells. For example, the mobile station monitors the reception level of CPICH (Common Pilot Channel), and if the level exceeds a predetermined threshold, the mobile station determines that interference with other cells is large and sends a signal (interference report information) to the base station. ). Then, the base station that has received the signal does not perform individual assignment for the mobile station, but switches the mobile station to continuous transmission.
- CPICH Common Pilot Channel
- the base station 400 has an interference report information extractor 401, and the mobile station 450 has an interference report information generator 451.
- the interference report information generation section 4551 generates interference report information based on the CPICH reception power information. Specifically, as described above, when the reception power of CPICH exceeds a predetermined threshold, it is determined that interference with other cells is large, and interference report information is generated. The generated interference report information is output to channel coding section 115 and scheduling information_transmission parameter extracting section 161.
- the interference report information extraction unit 401 extracts interference report information from the data received from each mobile station.
- the extracted interference report information is output to the scheduling parameter transmission parameter determination unit 113.
- the scheduling / transmission parameter determination unit 113 receives the interference report information from the interference report information extraction unit 401, the interference report information is transmitted in the same manner as in the case of inputting the soft handover information in the first embodiment.
- the normal allocation process described above is not performed on the transmitting mobile station. Thereby, the mobile station can If there is data to be transmitted, continuous transmission is performed at a fixed transmission rate (coding rate, modulation method, spreading factor, transmission power).
- the method of releasing the continuous transmission mode is not limited to the above example.
- the continuous transmission mode is set when the interference report information is not supplied for a predetermined time. It is also possible to cancel and shift to the normal assignment transmission mode.
- BTS 1 base station
- BTS 2 base station
- the mobile station (MS) connected to the base station (BTS 1) gives a large amount of interference to another base station (BTS 2)
- the mobile station (MS) Sends interference report information to the base station (BTS 1), and in response, the base station (BTS 1) does not send allocation information to the mobile station (MS).
- the base station when a mobile station is in a state of large interference with other cells, the base station does not individually assign the mobile station, and the mobile station has a fixed Since continuous transmission is performed at the transmission rate, fluctuations in the amount of interference with other cells can be reduced in the uplink, and when allocating, interference from other cells can be estimated and optimal allocation can be performed. It can be possible.
- interference to other cells other than soft handover is displayed.
- the CPICH reception level is used, but is not limited to this. Any channel that can detect interference with other cells (for example, a channel that is transmitted at a constant power and includes a pilot signal) is used. Any channel may be used.
- continuous transmission may be performed spontaneously after a predetermined time.
- Embodiments 1 to 3 can be arbitrarily combined with Embodiments 1 to 3 using soft handover information.
- Embodiments 1 to 3 also applies to this embodiment. It should be noted that the method of controlling the transmission rate for continuously transmitting mobile stations is not limited to the method described in the third embodiment, and it goes without saying that another method may be used.
- the case of switching to another channel is used as a method of switching to the continuous transmission mode.
- the DPCH Dedicated Physical Channel
- the channel is based on soft handover information (see Embodiment 1) or interference report information (see Embodiment 4).
- soft handover information see Embodiment 1
- interference report information see Embodiment 4
- the switching destination channel is not limited to DPCH. If there is data to be transmitted, any channel may be used as long as the channel transmits the data continuously.
- FIGS. 23 to 25 are diagrams for explaining a method of switching to the continuous transmission mode according to the fifth embodiment.
- a mobile station (MS) performs a soft handover (S In the HO) state
- the mobile station (MS) and the base stations (BTS 1, BTS 2) in the soft handover (SHO) state obtain channel switching information from the upper RNC 180 to the D PCH
- the channel to the mobile station (MS) is switched to a DPCH that allows continuous transmission, and data is transmitted using this DPCH.
- the soft handover state disappears, the channel switching information to the original channel is obtained from RNC 180, the channel to the mobile station (MS) is switched to the original channel, and the data based on the allocation is transferred.
- Send Send.
- the supply of the channel switching information to the DPCH from the RNC 180 to the base station is performed, for example, in addition to the case based on the soft handover information, as described in the above example, as well as the interference report information or the base station. It may be based on the switching request information from the station.
- the RNC 180a has a soft handover (SHO) information management section 183, a mobile station and channel management section 181, and a soft handover information management section. Based on the information from 183, the mobile station and the channel management unit 181 supply channel switching information to the base station.
- the RNC 180b has a mobile station and a channel management unit 181, and provides interference report information from the base station (this information itself is transmitted from the mobile station.
- channel switching information is supplied from the mobile station and the channel management unit 18 1 to the base station based on the switching request information.
- the base station switches a channel with the mobile station to a channel capable of continuous transmission, and the mobile station remains at a constant level. Since continuous transmission is performed at the same transmission rate, fluctuations in the amount of interference with other cells can be reduced in the uplink, interference from other cells can be estimated at the time of allocation, and optimal transmission can be performed. Assignments can be made possible.
- Embodiments 1 to 4 also applies to this embodiment.
- SHO soft handover
- the first pattern is a case where one base station (E) allocates and one base station (E) receives, as shown in FIG. 26A.
- the second pattern is a case where one base station (E) allocates and a plurality of base stations (E, F, G) receive as shown in FIG. 26B.
- the third pattern is a case where a plurality of base stations (E, F, G) are allocated and a plurality of base stations (E, F, G) receive as shown in FIG. 26C.
- the base station Since the processing at the base station has a smaller delay than the processing at the higher-level RNC, the base station performs the allocation so that the allocation can be performed in accordance with the channel quality rather than the allocation at the RNC.
- each pattern is as follows. In the first pattern, control is the simplest.
- the second pattern has a higher probability of successful reception than the first pattern because reception is performed by multiple base stations. (It is only necessary that the data be collected at the RNC. It only needs to be received). These two patterns require less processing by the mobile station and consume less radio resources than the third pattern.
- the third pattern involves allocation from multiple base stations, so an algorithm is needed to determine the transmission rate at the mobile station. You can decide the rate.
- Each of the above embodiments can be applied to all of the first to third patterns. According to the embodiment, by reducing the fluctuation of interference with other cells, the efficiency of allocation in other cells can be improved, and resources can be used effectively.
- the base station apparatus of the present invention is a communication terminal apparatus in its own cell.
- Allocating means for determining scheduling and transmission parameters; and transmitting means for transmitting an allocation result of the allocating means, wherein the allocating means is a communication terminal in a soft handover state among communication terminal devices in its own cell.
- a configuration is adopted in which individual assignment is not performed for terminal devices.
- the information of the soft handover used by the allocating means is provided from a higher layer, more specifically, a higher RNC (Radio Network Controller).
- the communication terminal device since individual assignment is not performed to a communication terminal device in the soft handover state, the communication terminal device performs continuous transmission at a constant transmission rate during soft handover. Become. As a result, in the uplink, interference from other cells can be estimated, and optimal allocation can be performed.
- the base station apparatus of the present invention in the above configuration, employs a configuration in which the transmission parameter is an upper limit value of a transmission rate that can be selected by a communication terminal device in the own cell.
- the transmission rate specified by the base station is the upper limit
- the communication terminal device can select a transmission rate lower than the specified transmission rate as an upper limit. Even if transmission cannot be performed at the specified transmission rate, transmission can be performed.
- the base station apparatus of the present invention in the above configuration, further includes: a determination unit configured to determine whether a transmission rate can be changed for the communication terminal device in the soft handover state. And transmitting an allocation result of the allocation unit based on the determination result.
- the base station apparatus of the present invention in the above configuration, only one base station among the plurality of base stations with which the communication terminal apparatuses in the soft handover state are communicating with each other is configured to perform the assignment based on the determination result of the determination unit. It adopts a configuration that transmits the result of allocating means.
- the communication terminal device can determine the transmission transmission rate. An algorithm is not required, so that the processing amount of the communication terminal device can be reduced and the consumption of wireless resources can be reduced.
- the base station apparatus of the present invention in the above configuration, further comprises a limiting unit that limits a transmission rate that can be assigned to the communication terminal device in the soft handover state, wherein the allocating unit is in the soft handover state.
- a limiting unit that limits a transmission rate that can be assigned to the communication terminal device in the soft handover state, wherein the allocating unit is in the soft handover state.
- a configuration is adopted in which a transmission parameter is determined for a communication terminal device in a certain cell within the restriction result of the restriction unit.
- a plurality of base stations with which a communication terminal device in the soft handover state is communicating have a limited transmission rate even if the assignment of another base station is not known.
- the power of the signal from the terminal device is not needlessly overestimated, and the optimum allocation can be performed to the communication terminal device in the own cell.
- the allocating unit estimates an interference amount based on transmission of a communication terminal device in a soft handover state among communication terminal devices in the own cell, and In consideration of the result, a configuration is adopted in which transmission parameters to be allocated to other communication terminal devices are determined.
- the amount of interference based on the transmission of the communication terminal device in the soft handover state is estimated, and transmission parameters to be assigned to other communication terminal devices are determined in consideration of the estimation result. It is possible to obtain transmission parameters that take into account the interference caused by the transmission of the communication terminal device. The allocation can be further optimized.
- the RNC device of the present invention is an RNC device connected to the base station device having the above configuration, and supplies information of soft handover regarding a communication terminal device in a cell of the base station device to the base station device. Take the configuration.
- the communication terminal device includes: an obtaining unit that obtains an allocation result from a base station device; and a transmitting unit that performs transmission at an allocated scheduling and transmission rate according to the obtained allocation result.
- the transmitting means employs a configuration in which, when the own communication terminal device is in a soft handover state, the transmitting means performs continuous transmission at a predetermined transmission rate. In this case, for example, the information of the soft handover used in the transmitting means is given from an upper layer.
- the communication terminal apparatus when in the soft handover state, can perform continuous transmission at a predetermined transmission rate preferentially, so that it is possible to estimate interference from other cells in the uplink, Optimal allocation can be made possible.
- the communication terminal device includes: an obtaining unit that obtains an allocation result from a base station device; and a transmitting unit that performs transmission at an allocated scheduling and transmission rate according to the obtained allocation result.
- the transmitting means adopts a configuration in which, when the own communication terminal device is in the soft handover state, the transmitting means performs continuous transmission at the transmission rate that was transmitted before the soft handover state. In this case, for example, the information of the soft handover used in the transmitting means is given from an upper layer.
- the communication terminal apparatus when in the soft handover state, performs continuous transmission at the transmission rate transmitted before the soft handover state, so that the base station apparatus of another cell communicates with its own cell. Signal to the terminal equipment Interference can be easily estimated and efficient allocation can be performed.
- the communication terminal device of the present invention in the above-described configuration, further comprising: a determination unit that determines a transmission rate at which transmission is possible in a range ⁇ that is equal to or less than the upper limit when the given transmission rate is an upper limit.
- the transmitting means performs transmission at the transmission rate determined by the determining means.
- the communication terminal device determines the transmission rate that can be transmitted within the range equal to or less than the upper limit. , It is possible to transmit.
- the communication terminal device of the present invention in the above configuration, employs a configuration in which the acquisition unit does not receive an assignment result from the base station device when the own communication terminal device is in a soft handover state.
- the communication terminal device when the communication terminal device is in the soft handover state, it does not receive the allocation result from the base station device, so that it is possible to reduce the processing amount and the power consumption.
- the communication terminal device of the present invention in the above configuration, employs a configuration in which, when the own communication terminal device is in a soft handover state, the acquisition unit does not use the allocation result received from the base station device.
- the communication terminal apparatus when in the soft handover state, the communication terminal apparatus does not use the allocation result received from the base station apparatus, and thus performs a predetermined transmission without performing a special control of not receiving the allocation result. It can be carried out.
- the communication terminal device of the present invention in the above configuration, further includes: a generation unit configured to generate report information necessary for assignment in the base station device, wherein the transmission unit includes a communication terminal device in a soft handover state. In this case, a configuration is adopted in which the report information is not transmitted.
- the communication terminal device of the present invention in the above configuration, further includes a generation unit that generates a signal indicating that the own communication terminal device is in a soft handover state, wherein the transmission unit is generated by the generation unit.
- a signal is transmitted to an assignment unit provided in the base station apparatus for performing scheduling and transmission parameter determination, as a destination.
- the base station apparatus can directly and easily know that a communication terminal apparatus in its own cell is in a soft handover state by a signal from the communication terminal apparatus, not from an upper layer. it can.
- the communication terminal device of the present invention adopts a configuration in the above configuration, in which the transmission unit follows transmission power control during transmission.
- the communication terminal device may further include a receiving unit that receives an allocation result based on whether the transmission rate can be changed from the base station device, and an allocation result based on the received transmission rate change availability. And a changing means for changing the transmission rate.
- the base station apparatus includes: an allocating unit that performs scheduling and determination of a transmission parameter for a communication terminal device in its own cell; and a transmitting unit that transmits an allocation result of the allocating unit.
- the means always assigns a communication terminal device in a soft handover state among communication terminal devices in its own cell at a predetermined transmission rate.
- the communication terminal device in the soft handover state is always assigned at a predetermined transmission rate. Can be estimated, and optimal allocation can be achieved.
- the communication terminal device includes: an obtaining unit that obtains an allocation result from a base station device; and a transmitting unit that performs transmission at an allocated scheduling and transmission rate according to the obtained allocation result.
- the transmitting means employs a configuration in which, when the own communication terminal device is in the soft handover state, continuous transmission is always performed at a predetermined transmission rate in accordance with the obtained allocation result.
- the communication terminal apparatus when in the soft handover state, the communication terminal apparatus always performs continuous transmission at a predetermined transmission rate, so that it is possible to estimate interference from other cells in the uplink, and Assignments can be made possible.
- the communication terminal device of the present invention in the above configuration, further includes: a generation unit configured to generate report information necessary for assignment in the base station device, wherein the transmission unit includes a communication terminal device in a soft handover state.
- a configuration is adopted in which the report information is not transmitted based on a control signal from the base station device.
- the base station apparatus includes: an allocating unit that performs scheduling and determination of a transmission parameter for a communication terminal device in its own cell; and a transmitting unit that transmits an allocation result of the allocating unit.
- the means adopts a configuration in which, among communication terminal devices in the own cell, a communication terminal device in a state where interference with other cells is large is not individually assigned.
- the base station apparatus can estimate interference from other cells, and can make optimal allocation.
- the communication terminal device includes: an obtaining unit that obtains an allocation result from a base station device; and a transmitting unit that performs transmission at an allocated scheduling and transmission rate according to the obtained allocation result.
- the transmitting means adopts a configuration in which, when the own communication terminal apparatus is in a state where interference with other cells is large, continuous transmission is performed at a predetermined transmission rate.
- the base station apparatus includes: an allocating unit that performs scheduling and determination of a transmission parameter for a communication terminal device in its own cell; and a transmitting unit that transmits an allocation result of the allocating unit.
- the means is configured to always assign at a predetermined transmission rate to communication terminal devices in the own cell that have a large interference with other cells.
- a communication terminal device that is in a state of large interference with other cells is always assigned at a predetermined transmission rate, so that fluctuations in interference with other cells in the uplink are reduced. Therefore, the base station apparatus can estimate interference from other cells, and can perform optimal allocation.
- the communication terminal device includes: an obtaining unit that obtains an allocation result from a base station device; and a transmitting unit that performs transmission at an allocated scheduling and transmission rate according to the obtained allocation result.
- the transmission means adopts a configuration in which, when the own communication terminal apparatus is in a state where interference with other cells is large, continuous transmission is always performed at a predetermined transmission rate according to the obtained allocation result.
- the communication terminal device further includes a generation unit that generates a signal indicating that the own communication terminal device is in a state where interference with another cell is large, and the transmission unit is generated by the generation unit. And send the signal.
- the communication terminal apparatus always performs continuous transmission at a predetermined transmission rate when interference with other cells is large, so that fluctuations in interference with other cells are reduced in the uplink. Therefore, the base station apparatus can estimate interference from other cells, and can perform optimal allocation.
- the base station apparatus of the present invention includes: an allocating unit that performs scheduling and determination of a transmission parameter for a communication terminal device in its own cell; and a transmitting unit that transmits an allocation result of the allocating unit.
- the means adopts a configuration in which a channel for a communication terminal device in a soft handover state among communication terminal devices in its own cell is switched to another channel capable of continuously transmitting data.
- the communication terminal device in the soft handover state switches to another channel capable of continuous transmission, so that the communication terminal device performs continuous transmission at a constant transmission rate during the soft handover. Will be.
- the communication terminal device includes: an obtaining unit that obtains an allocation result from a base station device; a transmitting unit that performs transmission on a first channel at an allocated scheduling and transmission rate according to the obtained allocation result; And wherein the transmitting means performs continuous transmission using a second channel capable of continuously transmitting data when the own communication terminal device is in a soft handover state.
- the communication terminal apparatus when in the soft handover state, performs continuous transmission at a predetermined transmission rate using another channel capable of continuous transmission. Therefore, in the uplink, interference from other cells can be estimated, and optimal allocation can be performed.
- the base station apparatus of the present invention includes: an allocating unit that performs scheduling and determination of a transmission parameter for a communication terminal device in its own cell; and a transmitting unit that transmits an allocation result of the allocating unit.
- the means adopts a configuration in which, of the communication terminal devices in the own cell, a channel for a communication terminal device having a large interference with other cells is switched to another channel capable of continuously transmitting data.
- the channel is switched to another channel capable of continuous transmission.
- continuous transmission is performed at a constant transmission rate.
- the communication terminal device includes: an obtaining unit that obtains an allocation result from a base station device; a transmitting unit that performs transmission on a first channel at an allocated scheduling and transmission rate according to the obtained allocation result; And wherein the transmitting means performs continuous transmission using a second channel capable of continuously transmitting data when the own communication terminal apparatus is in a state of large interference with other cells.
- the communication terminal apparatus performs continuous transmission at a predetermined transmission rate using another channel capable of continuous transmission when interference with other cells is large. Interference from other cells can be estimated, and optimal assignment can be made possible.
- the base station apparatus and the communication terminal apparatus according to the present invention can estimate interference from other cells in the uplink, enable optimal allocation, and perform high-speed bucket transmission on the uplink. Useful as technology.
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Abstract
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Priority Applications (5)
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US10/515,818 US20050220052A1 (en) | 2002-12-27 | 2003-12-26 | Base station device and communication terminal device |
CA002485963A CA2485963A1 (en) | 2002-12-27 | 2003-12-26 | Base station device and communication terminal device |
AU2003292638A AU2003292638A1 (en) | 2002-12-27 | 2003-12-26 | Base station device and communication terminal device |
EP03782923A EP1578161A4 (en) | 2002-12-27 | 2003-12-26 | BASIC STATION EQUIPMENT AND COMMUNICATION TERMINAL DEVICE |
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JP2002524962A (ja) * | 1998-09-10 | 2002-08-06 | クゥアルコム・インコーポレイテッド | ワイヤレス通信システムにおける、レートおよび電力などのリソースの分散型最適リバースリンクスケジューリングのための方法および装置 |
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US5923650A (en) * | 1997-04-08 | 1999-07-13 | Qualcomm Incorporated | Method and apparatus for reverse link rate scheduling |
US5914950A (en) * | 1997-04-08 | 1999-06-22 | Qualcomm Incorporated | Method and apparatus for reverse link rate scheduling |
US6539226B1 (en) * | 1998-02-16 | 2003-03-25 | Nec Corporation | Base station transmission power control system mobile station and base station |
US20030223396A1 (en) * | 2002-05-31 | 2003-12-04 | Tsai Shiau-He Shawn | Method of indicating the forward link serving sector in high data rate CDMA systems |
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- 2003-12-26 WO PCT/JP2003/016909 patent/WO2004062311A1/ja active Application Filing
- 2003-12-26 EP EP03782923A patent/EP1578161A4/en not_active Withdrawn
- 2003-12-26 AU AU2003292638A patent/AU2003292638A1/en not_active Abandoned
- 2003-12-26 CA CA002485963A patent/CA2485963A1/en not_active Abandoned
- 2003-12-26 US US10/515,818 patent/US20050220052A1/en not_active Abandoned
- 2003-12-26 KR KR1020047016451A patent/KR100624074B1/ko not_active IP Right Cessation
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JP2002524962A (ja) * | 1998-09-10 | 2002-08-06 | クゥアルコム・インコーポレイテッド | ワイヤレス通信システムにおける、レートおよび電力などのリソースの分散型最適リバースリンクスケジューリングのための方法および装置 |
JP2003008635A (ja) * | 2001-04-02 | 2003-01-10 | Lucent Technol Inc | 複数のデータフローをスケジューリングする方法およびそのためのソフトウエアおよびcdmaシステムおよびベーストランシーバステーションおよび移動体局 |
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EP1696615A1 (en) * | 2005-02-28 | 2006-08-30 | NTT DoCoMo, Inc. | Transmission rate control method, mobile station, and radio network controller |
EP1720372A1 (en) * | 2005-05-02 | 2006-11-08 | NTT DoCoMo INC. | Mobile communication method and radio network controller |
EP1988735A1 (en) * | 2005-05-02 | 2008-11-05 | NTT DoCoMo, Inc. | Mobile communication method and radio network controller |
CN1882185B (zh) * | 2005-06-17 | 2010-05-26 | 日本电气株式会社 | 移动通信系统、移动终端和移动终端发送调度方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1578161A4 (en) | 2006-01-18 |
KR100624074B1 (ko) | 2006-09-19 |
EP1578161A1 (en) | 2005-09-21 |
KR20040111515A (ko) | 2004-12-31 |
US20050220052A1 (en) | 2005-10-06 |
AU2003292638A1 (en) | 2004-07-29 |
CA2485963A1 (en) | 2004-07-22 |
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