WO2004098225A1 - 複数の受信装置の中から選択した受信装置のデータを共有チャネルに割り当てる送信装置およびデータの割り当て方法 - Google Patents
複数の受信装置の中から選択した受信装置のデータを共有チャネルに割り当てる送信装置およびデータの割り当て方法 Download PDFInfo
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- WO2004098225A1 WO2004098225A1 PCT/JP2003/005331 JP0305331W WO2004098225A1 WO 2004098225 A1 WO2004098225 A1 WO 2004098225A1 JP 0305331 W JP0305331 W JP 0305331W WO 2004098225 A1 WO2004098225 A1 WO 2004098225A1
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- quality data
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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
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
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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
- H04L47/00—Traffic control in data switching networks
- H04L47/50—Queue scheduling
- H04L47/62—Queue scheduling characterised by scheduling criteria
- H04L47/625—Queue scheduling characterised by scheduling criteria for service slots or service orders
- H04L47/626—Queue scheduling characterised by scheduling criteria for service slots or service orders channel conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
- H04W52/223—TPC being performed according to specific parameters taking into account previous information or commands predicting future states of the transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
Definitions
- the present invention relates to a transmitting device and a data allocating method for allocating data of a receiving device selected from a plurality of receiving devices to a shared channel.
- the present invention relates to a transmitting device that transmits data to at least one of a plurality of receiving devices by a radio signal via a channel shared by the plurality of receiving devices, and more specifically, to improve throughput.
- the present invention relates to a transmitting device that selects a receiving device, allocates transmission data to the selected receiving device to a channel, and transmits the channel to the selected receiving device.
- the present invention also relates to a base station device to which such a technique is applied. Further, the present invention relates to an allocation method for allocating transmission data to a selected one of the receiving devices to a radio signal channel shared by the plurality of receiving devices, and more specifically, to improve the throughput. On possible assignment methods. Background technology ''s transmission data to the selected receiving devices to a radio signal via a channel shared by the plurality of receiving devices, and more specifically, to improve throughput.
- CDMA Code Division Multiple Access
- W-CDMA Wideband CDMA
- HSDPA High Speed Data Packet Access
- the Maximum CIR method is a method of comparing the reception quality of each mobile station and preferentially assigning the data of the mobile station with the best reception quality to the time slot.
- the Proportional Fairness method gives priority to the data of the mobile station where the ratio between the average reception quality of each mobile station (average of the reception quality at each mobile station over a predetermined time) and the instantaneous reception quality is highest. This is a method of allocating to slots. As described above, the scheduling and scheduling methods determine the allocation of the time slot based on the reception quality notified from the mobile station.
- FIG. 14 shows a change in the status of the transmission line due to the processing delay.
- the horizontal axis indicates time.
- the vertical axis represents information (mobile station information, reception quality) given from the mobile station, and is, for example, a value of a signal-to-interference ratio (SIR) of the mobile station.
- the mobile station periodically transmits mobile station information to the base station.
- the time t 1 at the point P 1 is the time at which the mobile station measures its own reception quality (which can be considered as the time at which the radio packet in the base station is assigned to the time slot). Is the value of the reception quality.
- Time t 2 at point P 2 is the time at which the base station transmits the radio bucket assigned to the time slot to the mobile station, and its value S 2 is the value of the reception quality at time t 2.
- the reception quality when actually transmitting a bucket differs from the reception quality when assigning a wireless bucket. I have. Even if a packet is transmitted to the mobile station selected based on the value of the reception quality at time t1, if the reception quality at the time of transmission is low, the mobile station cannot receive data or has a data error. And many processes such as packet retransmission are required. As a result, throughput decreases.
- the mobile station can select a base station from a plurality of base stations.
- a base station schedules the measurement of the received electric field strength of the signal of the base station and efficiently selects a base station to be updated (for example, see Patent Document 1).
- the base station apparatus monitors the transmission power of a plurality of communication terminals as a conventional technique for scheduling and MCS selection of a shared channel (DSCH) in which one channel is used by a plurality of communication terminals.
- DSCH shared channel
- There is a base station apparatus that performs scheduling of a shared channel based on the scheduling and transmits a shared channel according to the scheduling for example, see Patent Document 2).
- Patent Document 1
- Patent Document 2
- An object of the present invention is to provide a transmitting device, a base station device, and a method of allocating data from a transmitting device to a receiving device, which improves the throughput.
- a transmitting device according to the present invention is a transmitting device that transmits data to at least one of a plurality of receiving devices by a radio signal via a channel shared by the plurality of receiving devices, A reception unit that receives reception quality data of each reception device periodically transmitted from each of the reception devices; a storage unit that stores one or a plurality of past reception quality data of the reception devices; and a storage unit that is stored in the storage unit.
- a prediction processing unit for obtaining a future predicted value related to the reception quality of the receiving device; and a receiving device based on the future predicted value of each receiving device at the time of data transmission obtained by the prediction processing unit.
- the allocation method according to the present invention is an allocation method for allocating transmission data to a selected one of the plurality of receiving devices to a radio signal channel shared by the plurality of receiving devices.
- a base station device is a base station device that transmits data to at least one of a plurality of mobile station devices by a radio signal via a channel shared by the plurality of mobile station devices, A receiving unit that receives reception quality data of each mobile station device periodically transmitted from each of the mobile station devices, and a storage unit that stores one or a plurality of past reception quality data of each of the mobile station devices. Based on one or more past reception quality data of each mobile station device stored in the storage unit and current reception quality data of each mobile station device received by the reception unit, A prediction processing unit for obtaining a future predicted value regarding the reception quality of each mobile station device at the time of data transmission; and a future prediction of each mobile station device at the time of data transmission obtained by the prediction processing unit. Based on the value, and selects a mobile station apparatus, and a allocation unit for allocating transmission data against the mobile station apparatus the selected the channel.
- a future predicted value regarding the reception quality of each receiving device (each mobile station device) at the time of data transmission is obtained, and the receiving device (mobile station device) is selected based on the future predicted value. Then, transmission data to the selected receiving device (mobile station device) is allocated to the channel. That is, the processing delay from the time of reception quality measurement of each receiving device (each mobile station device) to the time of data transmission in the transmitting device is taken into account when assigning data to channels.
- the best receiving device (mobile station device) in the receiving state can be accurately selected.
- the reception data error rate at the receiving device (mobile station device) and the data retransmission rate due to the data error are reduced. It can reduce and increase the throughput.
- Figure 1 is a Proc diagram showing the overall configuration of a mobile communication system to which the present invention is applied 0
- FIG. 2 is a block diagram showing a configuration of a transmission line assignment device provided in the base station according to the first embodiment of the present invention.
- FIG. 3 is a block diagram showing a configuration of a transmission path assignment device provided in a base station according to the second embodiment of the present invention.
- FIG. 4 is a block diagram showing a configuration of a transmission line assignment device provided in a base station according to the third embodiment of the present invention.
- FIG. 5 is a block diagram showing a configuration of a transmission line assignment device provided in a base station according to a fourth embodiment of the present invention.
- FIG. 6 is a block diagram showing a configuration of a transmission line assignment device provided in a base station according to a fifth embodiment of the present invention.
- FIG. 7 is a block diagram showing a configuration of a transmission line assignment device provided in a base station according to a sixth embodiment of the present invention.
- FIG. 8 is a block diagram showing a configuration of a transmission line assignment device provided in a base station according to a seventh embodiment of the present invention.
- FIG. 9 is a block diagram showing a configuration of a transmission line assignment device provided in a base station according to an eighth embodiment of the present invention.
- FIG. 10 is a block diagram illustrating a configuration of a transmission line assignment device provided in a base station according to a ninth embodiment of the present invention.
- FIG. 11 shows an example of the function PRC.
- FIG. 12 is a block diagram showing a configuration of a transmission line allocating device provided in a base station according to the thirteenth embodiment of the present invention.
- FIG. 13 is a graph showing changes in mobile station information.
- FIG. 14 is a graph showing changes in mobile station information. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a block diagram showing an overall configuration of a mobile communication system to which the present invention is applied.
- the W-C DMA system is used as the communication system, and the HSDPA system is used for the downlink.
- an ellipse 300 shown by a broken line in FIG. 1 indicates a range of an area (cell) of the base station 100.
- the present invention is applied to a base station 100 among the components of the mobile communication system. Therefore, the present invention is applied to the allocation of user data (radio packets) to downlink time slots from the base station 100 to the mobile stations 200 to 200 m .
- FIG. 2 is a block diagram showing a configuration of the transmission path allocating apparatus 1 provided in the base station 100 according to the first embodiment of the present invention.
- the transmission path allocating apparatus 1 includes a mobile station information processing unit 11 connected to a receiving unit 21, a prediction processing unit 12, and a wireless bucket allocation processing unit 13 connected to a transmitting unit 22.
- Reception unit 2 1 is received by the antenna 3, the mobile station demodulates the mobile station 2 0 0 radio signal from to 2 0 0 n, despreading, performs analog / digital conversion and the like, the received signal as di digital signal Information processing unit 11
- the mobile station information processing section 11 extracts mobile station information necessary for wireless packet allocation processing, which is included in the received signal given from the receiving section 11, and supplies it to the prediction processing section 12.
- the mobile station information (MSC (Modulation Coding Set) or CQI (Channel Quality Indicator)) required for the wireless packet allocation processing includes, for example, the reception quality of each mobile station (for example, signal-to-interference ratio (SIR: Signal-to- -Interference Ratio) and reception quality calculated (eg, multiplied) by the moving speed of the mobile station.
- SIR Signal-to-Interference Ratio
- reception quality calculated eg, multiplied
- the mobile station 200 periodically notifies its own mobile station information MC S i to the base station 100 via a predetermined channel (for example, DPC CH—HS (HS-DSCH associated uplink dedicated control cliannel)). . Then, the base station 100 (prediction processing unit 12) can receive the mobile station information MC S i MS C m almost simultaneously from all the mobile stations 20 C ⁇ Z 00 m existing in the area 300. .
- a predetermined channel for example, DPC CH—HS (HS-DSCH associated uplink dedicated control cliannel)
- the prediction processing unit 12 is configured to receive the mobile station information MCS! Provided from the mobile station information processing unit 11. ⁇ Evaluation value for determining which user's radio bucket is assigned to the n-th time slot based on MC S m Ask for.
- Evaluation value F !!) ⁇ ? ⁇ : !) is obtained by the following formula (1) in the conventional maximum CIR method;
- i is an index for specifying a mobile station, as described above, and is an integer from 1 to m.
- n in MCS n) indicates that it is mobile station information used for allocating a radio packet to the n-th time slot.
- the wireless packet allocation processing unit 13 compares the evaluation values of the mobile stations, and allocates the wireless packet of the mobile station having the maximum evaluation value to the n-th time slot.
- this method does not necessarily take into account the communication state between the mobile station and the base station when a wireless packet is assigned to a time slot and is actually transmitted, as described in the Background Art section. Optimal time slot assignment cannot be performed.
- transmission section 22 places radio packet in downlink time slot n and transmits it (hereinafter referred to as “transmission time”). Is estimated, and the assignment to the time slot is determined based on the estimated evaluation value.
- the prediction processing unit 12 calculates the evaluation value F i in consideration of the delay time d by the following equation (2). Find (n). Note that the delay time d can be obtained in advance by simulation, experiment, or the like.
- MCSi (n + d) is a value (predicted value) of mobile station information at the time of transmission in consideration of the delay time d, and is represented by the following equation (3).
- MCSi (n + d) FwicAi [MCSi (n), MCSi (n -r), d] (3)
- mobile station information MC Si (n—te) is mobile station information in the (n—te) th time slot, that is, mobile station information past ⁇ time slots from the nth time slot. It is.
- the function FuncAi is a function that depends on the fluctuation of the mobile station information and the mobile station moving speed, and is based on the current mobile station information MCSi (n) and the past mobile station information MCS11- This function predicts the value of mobile station information after the delay time d.
- the function FuncAi for example, various functions such as a linear function and a quadratic function can be used, and an appropriate function is selected according to the processing capability of the base station 100, fluctuation of mobile station information, and the like. Then, the selected function is set in the prediction processing unit 12 as a program or a hardware circuit.
- the slope a and the intercept b are the coordinates of the point P1 of the mobile station information MC S i (n) with reference to Fig. 13. [N, MCS ; ( ⁇ )] and the coordinates [n_te, MCSn-te) of the point P0 of the mobile station information MCSi (n-te)]. And the function from which a and b were found a ⁇ By assigning the delay time 11 + d to the variable X of x + b, the future predicted value MC S i (n + d) is obtained.
- the number (time) ⁇ of the time slots can be a value corresponding to the moving speed of each mobile station 200i, or can be a fixed value regardless of the moving speed of the mobile station. In the former case, for example, it is possible to set a value of about 1Z4 of the fading cycle determined by the moving speed. In the latter case, the value should be about 1/4 of the fading period obtained from the predetermined maximum moving speed. Can be set.
- the moving speed can be obtained by each mobile station obtaining its own moving speed and notifying the base station 100, or the base station 100 can obtain the moving speed of each mobile station.
- the mobile station information (that is, the future predicted value) at the time of transmission, that is, at the time 1 + d at the point P2 is predicted.
- the prediction processing unit 12 obtains evaluation values (future prediction values) F r Fjn) of the mobile stations 200 to 200 m based on the above equations (2) and (3), and allocates these evaluation values to radio packets. This is given to the processing unit 13.
- the radio bucket allocation processing unit 13 determines a mobile station free bucket to be allocated to the n-th time slot based on the evaluation value F r F n) given from the prediction processing unit 12.
- the existing Maximum CIE method Maximum CIR method
- the Proportional Fairness method Maximum fluctuating user selection method
- the like can be used as a method for determining a wireless packet.
- the maximum value (the evaluation value F k (n)) is selected from the evaluation values (future prediction values) F n) to F m (n). Then, the radio bucket of the mobile station 200 k corresponding to the maximum evaluation value F k (n) is allocated to the time slot 11. .
- the radio packet allocation processing unit 13 determines the modulation scheme (QPSK, 16QAM, etc.) of the allocated radio bucket and the number of spreading codes based on the evaluation value F k (n). , Transmission data amount and the like. Then, the wireless packet allocation processing unit 13 determines (the identifier of) the selected mobile station 200 k (and the bucket number or identifier of the selected wireless bucket as needed), and the determined modulation method, number of spreading codes, The transmission data amount and the like are given to the transmission unit 22.
- the modulation scheme QPSK, 16QAM, etc.
- Transmitter 22 based on the information provided by the radio Baketsuto allocation processing unit 1 3, the n-th both diffusion of wireless packet when deploying wireless Baketsuto to the mobile station 200 k in time slot, performs modulation or the like,
- the wireless packet is transmitted by a radio signal via the antenna 3.
- the reception bucket discard rate at the mobile station side and the bucket retransmission rate accompanying the discard are reduced, and the throughput can be improved.
- the past mobile station information in the first embodiment can be a statistical value (for example, an average value) of past mobile station information.
- FIG. 3 is a block diagram showing a configuration of a transmission path allocating apparatus 1 provided in a base station 100 according to the second embodiment of the present invention.
- the transmission path allocating apparatus 1 has a mobile station information processing unit 11 connected to a receiving unit 21, a prediction processing unit 12a, a statistical processing unit 14, and a wireless bucket allocation processing unit 13 connected to a transmitting unit 22. .
- the same components as the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
- the mobile station information MCSi (n) collected by the mobile station information processing unit 11 is provided to the statistical processing unit 14 and the prediction processing unit 12a.
- the statistical processing unit 14 holds past mobile station information for a predetermined period, and stores the current mobile station information MCS n) given from the mobile station information processing unit 11 and the stored past mobile station information.
- the statistical processing is performed on the mobile station information based on the statistical processing, and the statistical processing result is provided to the prediction processing unit 12a.
- the statistical information processing unit 11 calculates the average value aveMC S, (11) obtained by averaging the current mobile station information MC S i (11) and one or more pieces of past mobile station information over a long interval. It is obtained as a statistical processing result, and given to the prediction processing unit 12a. More specifically, the current mobile station information MCS n) and the four mobile station information MCS-1) corresponding to the past (n-1) th to (n-4) th time slots The average value aveMC Si (n) of the five MCSs with “MC S” ( ⁇ -4) was obtained, and this was predicted as the result of statistical processing. Measurement processing section 1 2a.
- the prediction processing unit 12 a includes the mobile station information MC S ”( ⁇ ) given from the mobile station information processing unit 11 and the statistic value given by the statistical processing unit 14, for example, an average value aveMC S] ( ⁇ ) Based on the above, the evaluation value (future prediction value) F n) is obtained by the above equation (2).
- MCSi (n + d) in the above equation (2) is represented by the following equation (4).
- MCSi (n + d) FuncBi [MCSi ⁇ n ⁇ aveMCSi (??), d] (4)
- the function FuncBi is a function that depends on the fluctuation of the mobile station information and the moving speed of the mobile station. Based on the current mobile station information MC S n) and the statistical result (average value) aveMC S i (n—te), This function predicts the value of mobile station information after the delay time d.
- the function FuncBi various functions such as a linear function and a quadratic function can be used, similarly to the function FuncAi of the first embodiment.
- the coordinates [n, MC S; (1)) of the point P 1 corresponding to the mobile station information MC S n) (see Fig. 13)
- the coordinates [ ⁇ — 2, aveMC S i (n)] corresponding to aveMG S ′ i ( ⁇ ) (when the x coordinate is the middle point of n — 4 to n)
- the slope a and intercept b are obtained.
- n + d is substituted for X of the function FuncBi in which a and b are determined, and the future predicted value MC S i (n + d) is obtained.
- Prediction processing section 1 2 a based on the equation (2) and (4), the mobile station 2 0 0 1-2 00 evaluation value of m (the future predicted value) F (n) ⁇ F m (n) Then, these evaluation values are given to the wireless packet allocation processing unit 13. As in the first embodiment, the wireless packet processing unit 13 selects a mobile station based on the evaluation value Fn ⁇ Fjn), and allocates a wireless packet of the selected mobile station to the nth time slot. For example, among the evaluation values F r F ⁇ n), the mobile station corresponding to the maximum evaluation value is selected. Then, in transmitting section 22, a radio packet is arranged in the assigned time slot and transmitted by a radio signal.
- a mobile station whose reception quality improves over time has a higher reputation, and as a result, the selection probability of the mobile station increases, while the mobile station whose reception quality deteriorates has a higher selection probability. Becomes lower. Therefore, the throughput can be improved as compared with the conventional scheduling method.
- FIG. 4 is a block diagram showing a configuration of a transmission path allocating apparatus 1 provided in a base station 100 according to the third embodiment of the present invention.
- the transmission path allocating apparatus 1 includes a mobile station information processing unit 11 connected to a reception unit 21, a prediction processing unit 12 b, and a wireless packet allocation processing unit 13 connected to a transmission unit 22.
- the same components as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. I do.
- the current mobile station information MCS is given from the mobile station information processing section 11 to the prediction processing section 12b.
- the prediction processing unit 12b calculates the evaluation value F i (n) by the following equation (5).
- MC S i (n + d) may be the one obtained by the above-described equation (3) in the first embodiment, or the one obtained by the equation (4) in the second embodiment. May be used.
- the function A is an increasing function using the future predicted value MC S i (n + d) as a variable, and similarly to the above functions FuncA and FuncB, various functions such as a linear function and a quadratic function are used. However, an increasing function can be used.
- the evaluation value F is changed from the current mobile station information MC S to the future predicted value MC S
- the radio bucket allocation processing unit 13 selects a mobile station corresponding to the maximum evaluation value, and allocates a radio packet of the selected mobile station to the eleventh time slot.
- the transmitting unit 14 is the same as in the first and second embodiments, and a description thereof will be omitted.
- the evaluation value of a mobile station whose reception quality improves with time increases, and as a result, the selection probability increases, while the mobile station whose reception quality deteriorates decreases the selection probability.
- Throughput can be improved compared to the conventional maximum CIR method.
- the mobile station information processing unit 11 gives the current mobile station information MC S i (n) to the radio bucket assignment processing unit 13 in addition to the prediction processing unit 12 b, and the prediction processing unit 12 b , And obtains only the future predicted value MC S i (11 + d) and gives it to the wireless packet allocation processing unit 13
- the wireless packet allocation processing unit 13 may calculate the evaluation value F (n) by the above equation (5).
- FIG. 5 is a block diagram showing a configuration of a transmission path allocating apparatus 1 provided in a base station 100 according to the fourth embodiment of the present invention.
- the transmission path allocating apparatus 1 includes a mobile station information processing unit 11 connected to a receiving unit 21, a prediction processing unit 12 c, a statistical processing unit 14 a, and a wireless bucket allocation processing unit connected to a transmitting unit 22.
- Has 1 3 The same components as those of the first embodiment (the mobile station information processing unit 11, the wireless packet allocation processing unit 13, the reception unit 21, and the transmission unit 22) are denoted by the same reference numerals, and detailed description thereof will be omitted.
- the mobile station information MCSi (n) collected by the mobile station information processing unit 11 is provided to the statistical processing unit 14a and the prediction processing unit 12c.
- the statistical processing unit 14a performs statistical processing based on the mobile station information MCS provided from the mobile station information processing unit 11, and provides a statistical processing result to the prediction processing unit 12c.
- this statistical processing result the same long-term average aveMCSi (n) as in the second embodiment described above can be used.
- the prediction processing unit 1 2 c includes the mobile station information MCS i (11) given from the mobile station information processing unit 11 and the statistical processing result given from the statistical processing unit 14 a (for example, long-term average aveMCSi (n)). ( ⁇ ) is calculated based on The following equation (6) is an equation for calculating the evaluation value F i (n) when the long-term average is used as the statistical processing result.
- the function B is an increasing function having the future predicted value MCS ; (n + d) as a variable, similarly to the function A in the above-described third embodiment.
- the evaluation value becomes a value obtained by performing weighting processing on the crown depending on the future predicted value MC S i (n + d).
- the wireless packet allocation processing unit 13 selects the mobile station corresponding to the maximum evaluation value, and allocates the wireless bucket of the selected mobile station to the nth time slot.
- the transmitting unit 14 is the same as in the first and second embodiments, and a description thereof will be omitted. According to the present embodiment, the evaluation value of a mobile station whose signal quality improves over time becomes higher (selection probability increases), and a mobile station whose reception quality deteriorates has a lower selection probability. Throughput can be improved compared to the Propoi'tional Fairness method.
- the statistical processing unit 14a gives the statistical processing result and the current mobile station information to the radio packet allocation processing unit 13, and the prediction processing unit 12c outputs the future predicted value MC S i (n + d)
- the calculated value may be given to the wireless bucket assignment processing unit 13, and the wireless bucket assignment processing unit 13 may find the evaluation value Fj (n) by the above equation (6).
- FIG. 6 is a block diagram illustrating a configuration of a transmission path allocating apparatus 1 provided in a base station 100 according to a fifth embodiment of the present invention.
- the transmission path allocating apparatus 1 includes a mobile station information processing unit 11 connected to a receiving unit 21, a prediction processing unit 12 d, and a wireless bucket allocation processing unit 13 connected to a transmitting unit 22.
- the same components as those in the first embodiment are assigned the same reference numerals, and detailed description thereof will be given. Omitted.
- the mobile station information MC S i (n) collected by the mobile station information processing unit 11 is given to the prediction processing unit 12 d.
- the prediction processing unit 1 2 d obtains the evaluation value F i (n) by the following equation (7) based on the mobile station information MCS given from the mobile station information processing unit 11.
- the function C is an increasing function that depends on the current mobile station information MCS and the future predicted value MCS; ( ⁇ + d).
- the current mobile station information MCS i (n) is compared with a predetermined threshold, and when the mobile station information MCS i (n) is equal to or higher than a predetermined threshold (that is, when the reception quality is relatively good).
- a predetermined threshold that is, when the reception quality is relatively good.
- the increasing function C a 2 ⁇ MCS i (n + d) + b (where 0 ⁇ a j ⁇ a 2 ).
- the reception quality is relatively good, for example, use 16QAM as the modulation method
- the addition function C is set according to the modulation method (and the number of spreading codes and the amount of transmission data). By making the change, the throughput can be further improved.
- the weighting measure can be set by the mobile station information MC S i (n).
- a mobile station whose reception quality improves over time has a higher reputation (selection probability increases), and a mobile station whose reception quality deteriorates has a lower selection probability.
- Throughput can be improved compared to the CIR method.
- the mobile station information processing unit 11 gives the current mobile station information MCS j (n) to the radio bucket assignment processing unit 13 in addition to the prediction processing unit 12 d, and the prediction processing unit 12 c Only the future predicted value MC S i (n + d) is obtained and given to the wireless bucket allocation processing unit 13, and the wireless packet allocation processing unit 13 obtains the evaluation value F i (n) by the above equation (7). Is also good.
- FIG. 7 is a block diagram illustrating a configuration of a transmission path allocating apparatus 1 provided in a base station 100 according to a sixth embodiment of the present invention.
- the transmission path allocating apparatus 1 includes a mobile station information processing unit 11 connected to a receiving unit 21, a prediction processing unit 12 e, a statistical processing unit 14 b, and a wireless bucket allocation processing unit connected to a transmitting unit 22.
- Has 1 3 The same components as those of the first and fourth embodiments (the mobile station information processing unit 11, the radio bucket allocation processing unit 13, the receiving unit 21, the transmitting unit 22, and the statistical processing unit 14a) are the same.
- the reference numerals are used, and the detailed description is omitted.
- the mobile station information MCSi (n) collected by the mobile station information processing section 11 is provided to the statistical processing section 14a and the prediction processing section 12e.
- the statistical processing unit 14a performs statistical processing based on the mobile station information MCS f (n), and obtains a statistical processing result (for example, a long section average aveMC S i (n)) to the prediction processing unit 1 2 e.
- a statistical processing result for example, a long section average aveMC S i (n)
- the prediction processing unit 12e obtains the evaluation value Fi (n) based on the mobile station information MC S n) and the statistical processing result. Equation (8) below is an equation for calculating the evaluation value Fn) when the long-range average is used as the statistical processing result.
- Fi ⁇ n) MC3 ⁇ 4 (") ⁇ D [MCSi (n + d) MCSi ( ⁇ i)] --- (S)
- the function D is an increasing function that depends on the current mobile station information MCS n) and the future predicted value MC S i (n + d) .
- the function D is the same as the function C in the above-described fifth embodiment.
- the weighting measure can be set by the mobile station information MC S n).
- the evaluation value of a mobile station whose reception quality improves with time increases increases (the selection probability increases), and the selection probability of a mobile station whose reception quality deteriorates decreases.
- Throughput can be improved compared to the Proportional Fairness method.
- the statistical processing unit 14a gives the statistical processing result and the current mobile station information to the wireless packet allocation processing unit 13 and the prediction processing unit 12e outputs the future prediction data MC S + d) May be obtained and given to the wireless bucket assignment processing unit 13, and the wireless bucket assignment processing unit 13 may obtain the evaluation value F i (n) by the above equation (8).
- FIG. 8 is a block diagram showing a configuration of the transmission path allocating apparatus 1 provided in the base station 100 according to the seventh embodiment of the present invention.
- the transmission path allocating apparatus 1 has a mobile station information processing section 11 connected to a receiving section 21, a prediction processing section 12 f, and a radio bucket allocation processing section 13 connected to a transmitting section 22.
- the same components as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. .
- the mobile station information MCS collected by the mobile station information processing section 11 is Given to 1 2 f.
- the prediction processing unit 12 ⁇ obtains the evaluation value Fi (11) by the following equation (9) based on the mobile station information MC S i ( ⁇ ).
- the function f i (n) can be obtained by dividing the current mobile station information M C S n) by the long-term average aveMC S n). f '(")... hi.)
- the reception quality is relatively good, for example, 16 QAM is used as the modulation method. If the reception quality is relatively poor, modulation is used if, for example, QPSK is used as the modulation method.
- the throughput can be further improved.
- the weight scale can be set by f n).
- the processes of the wireless packet assignment processing unit 13 and the transmission unit 22 are the same as those in the above-described embodiments, and thus description thereof will be omitted.
- the reputation of a mobile station whose reception quality improves over time increases (the selection probability increases), and the mobile station whose reception quality deteriorates has a low selection probability.
- Throughput can be improved compared to the CIR method.
- the mobile station information processing unit 11 gives the current mobile station information MC S n) to the radio packet assignment processing unit 13 in addition to the prediction processing unit 12 f, and the prediction processing unit 12 f
- the predicted values MCS n + d) and ⁇ n) are obtained and given to the radio bucket allocation processing unit 13, and the radio packet allocation processing unit 13 calculates the evaluation value F n) by the above equation (9). May be requested.
- FIG. 9 is a block diagram showing a configuration of a transmission path allocating apparatus 1 provided in a base station 100 according to the eighth embodiment of the present invention.
- the transmission path allocating apparatus 1 includes a mobile station information processing unit 11 connected to a receiving unit 21, a prediction processing unit 12 e, a statistical processing unit 14 b, and a wireless packet allocation processing unit connected to a transmitting unit 22.
- Has 1 3 The same components as those in the first and fourth embodiments (the mobile station information processing unit 11, the radio bucket allocation processing unit 13, the receiving unit 21, the transmitting unit 22, and the statistical processing unit 14a) have the same codes. And a detailed description thereof will be omitted.
- the mobile station information MCSi (n) collected by the mobile station information processing unit 11 is provided to the statistical processing unit 14a and the prediction processing unit 12g.
- the statistical processing unit 14a performs statistical processing based on the mobile station information MC S ⁇ (n), and obtains the statistical processing result (for example, long-term average aveMC S i (n)) Is given to the prediction processing unit 12 g .
- the prediction processing unit 12g obtains the evaluation Fn) based on the mobile station information MCS; (n) and the result of the statistical processing.
- the following equation (11) is an equation for calculating the evaluation value F i (n) when the long-term average is used as the statistical processing result.
- Fi ⁇ n , X F [MCSi ⁇ n + d), fi (n)]-(11)
- f i (n) is shown in Expression (10) in the seventh embodiment, and the same function F as the function E in the seventh embodiment can be used.
- the statistical processing unit 14a gives the statistical processing result and the current mobile station information to the radio packet allocation processing unit 13, and the prediction processing unit 12g calculates the future predicted value MC S + d).
- the evaluation value F ⁇ n) may be given to the wireless bucket allocation processing unit 13 and the evaluation value F ⁇ n) may be obtained by the wireless packet allocation processing unit 13 according to the above equation (11).
- the transmission rate (transmitted data amount) to the mobile station 200 can be corrected based on the future predicted value MC S i (n + d).
- FIG. 10 is a block diagram showing a configuration of a transmission path allocating apparatus 1 provided in a base station 100 according to a ninth embodiment of the present invention.
- the transmission path allocating apparatus 1 includes a mobile station information processing unit 11 connected to a receiving unit 21, a prediction processing unit 12, and a wireless bucket allocation processing unit 13 connected to a transmitting unit 22. Further, the wireless bucket assignment processing unit 13 further includes a transmission rate correction unit 130.
- the same components as those in the first embodiment are assigned the same reference numerals. The detailed description is omitted.
- the wireless packet assignment processing unit 13 compares m evaluation values F (n) to Fm (n) given from the prediction processing unit 12 The mobile station (mobile station 200k ) corresponding to the evaluation value of is selected. Then, the no bucket of the mobile station 200 k is allocated to the n-th time slot.
- the transmission rate correction unit 130 corrects the transmission rate of the wireless packet allocated to the n-th time slot. That is, the transmission rate correction unit 130 receives the mobile station information MC S n) from the mobile station information processing unit 11 and the future predicted value MC S; (n + d) from the prediction processing unit 12; Then, it receives the information of the selected mobile station (such as the identifier of the mobile station) from the wireless packet allocation processing unit 13. Then, the transmission rate correction unit 130 calculates the following based on the mobile station information of the selected mobile station (referred to as MCS sel (n)) and the future predicted value (referred to as MCS sel (n + d)). The corrected transmission rate R (n) is obtained by the equation (12).
- the function PRC is a function for converting the current mobile station information MCS sel (n) into a transmission rate.
- FIG. 11 shows an example of the function PRC.
- the horizontal axis is MCS sel (n), and the vertical axis is the transmission rate (Kb ps).
- Kb ps the transmission rate
- the transmission rate is 600 K bps
- the transmission rate is 1 200 K bps.
- the specific value of each of a to g is It is set to an appropriate value by experiments, simulations, actual operations, and so on. Note that the parentheses after the number of the transmission rate indicate the modulation method QP SK or 16QAM.
- G [MCS sel (n + d)] in equation (12) is a correction that corrects the transmission rate obtained by the function PRC based on the future predicted value 1 ⁇ [3 ⁇ 1 (11+ ()).
- the function G is an increasing function, and the same function as the function A or the like in the embodiment described above can be used.
- the wireless packet allocation processing unit 13 multiplies the corrected transmission rate R (n) obtained by the transmission rate correction unit 13 by the time of the n-th time slot to obtain a data amount. Then, the wireless packet allocation processing unit 13 gives this data amount to the transmission unit 22.
- the transmission rate of the radio bucket of a mobile station whose reception quality improves over time is corrected to be high, and the transmission rate of the radio bucket of a mobile station whose reception quality is degraded is corrected to be low. Transmission rate errors can be suppressed and throughput can be improved.
- the transmission rate correction unit 130 in FIG. 10 can also correct the transmission rate by the following equation (13).
- the value of the function G is multiplied by the value of the function PRC, but in the equation (13) of the present embodiment, the function of the variable of the function PRC is The value of G is multiplied, and the multiplied value is converted to the transmission rate.
- the radio bucket transmission rate of a mobile station whose reception quality improves over time is corrected to be high, and the radio bucket transmission rate of a mobile station whose reception quality is degraded is corrected to be low. Transmission rate errors can be suppressed and throughput can be improved.
- the transmission rate correction unit 130 in FIG. 10 can also correct the transmission rate by the following equation (14).
- R (") PRC [MCSsel (n)] ⁇ I [MCSseI (n + d), MCSsel (n)] (14) where the function I is the same as the function C in the fifth embodiment.
- the weighting scale can be set by the mobile station information (MC S se ⁇ ⁇ ).
- the radio packet transmission rate of the mobile station in which the reception quality improves over time can be used. Is corrected to be high, and the radio bucket transmission rate of a mobile station whose reception quality is degraded is corrected to be low, so that transmission rate errors due to processing delays can be suppressed and throughput can be improved.
- the transmission rate correction unit 130 of FIG. 10 can also correct the transmission rate by the following equation (15).
- the value of the function PRC is multiplied by the value of the function I.
- the value of the variable of the function PRC is Is multiplied by the value of function J, and the multiplied value is converted to the transmission rate.
- the weighting measure can be set by the mobile station information MCS se n).
- the radio packet transmission rate of a mobile station whose reception quality is improved is corrected to be high over time, and the radio packet transmission rate of a mobile station whose reception quality is degraded is corrected to be low over time. Transmission rate errors due to delay can be suppressed, and throughput can be improved.
- FIG. 12 is a block diagram showing the configuration of the transmission line allocating device 1 provided in the base station 100 according to the thirteenth embodiment of the present invention.
- the transmission path allocating device 1 includes a mobile station information processing unit 11 connected to the reception unit 21, a prediction processing unit 12 a, a statistical processing unit 14, and a wireless packet allocation process connected to the transmission unit 22. It has a part 13. Further, the wireless packet assignment processing unit 13 further includes a transmission rate correction unit 130a.
- the same components as in the previous embodiments (mobile station information processing unit 11, prediction processing unit 12a, statistical processing unit 14, radio packet allocation processing unit 13, reception unit 21, transmission unit 22) Are denoted by the same reference numerals, and detailed description thereof will be omitted.
- the statistical processing unit 14 performs statistical processing based on the mobile station information MCS i (n), and outputs the statistical processing result (for example, long-term average aveMC S ⁇ ⁇ ) to the wireless packet allocation processing unit 13
- the prediction processing unit 12a gives the future predicted value MCS + d) to the wireless bucket allocation processing unit 13 (transmission rate correction unit 130a).
- the transmission rate correction unit 130a is based on the current mobile station information MC S n), the statistical processing result (here, the long-term average aveMC S 5 ( ⁇ )), and the future predicted value MC S ⁇ 11 + d) Then, the transmission rate R (n) is obtained by the following equations (16) and (17).
- R ⁇ n) PRC [MCSsel ⁇ n)] x K [MCSsel (n + d), fsel (n)] ... (16) fee) ... (17)
- the weighting measure can be set by the mobile station information f sel (n).
- the radio bucket transmission rate of a mobile station whose reception quality improves over time is corrected to be high, and the radio bucket transmission rate of a mobile station whose reception quality is degraded is corrected to be low. Transmission rate errors can be suppressed and throughput can be improved.
- the transmission rate correction unit 130a in the thirteenth embodiment can also calculate the transmission rate R (n) by the following equation (18).
- R (n) PRC [MCSsel (n) x L [MCSsel (n + d fsel (n)]]... (18)
- the value of the function PRC is multiplied by the value of the function K.
- the value of the variable of the function PRC is Is multiplied by the value of the function L, and the multiplied value is converted to the transmission rate.
- the function L the same function as the above function K can be used.
- the weighting measure can be set by the mobile station information f s EL (n).
- the radio bucket transmission rate of a mobile station whose reception quality improves over time is corrected to be high, and the radio bucket transmission rate of a mobile station whose reception quality is degraded is corrected to be low. Transmission rate error due to Put can be improved.
- the present invention provides the present invention to a base station.
- the present invention is not limited to a base station, and may be used to transmit data to a plurality of receiving devices.
- the present invention can be applied to any transmitting device that selects one receiving device and transmits data to the selected receiving device.
- the present invention relates to a transmitting apparatus (base station apparatus) for transmitting data to at least one of a plurality of receiving apparatuses (mobile station apparatuses) by a radio signal via a channel shared by the plurality of receiving apparatuses (mobile station apparatuses). ) Can be applied.
- base station apparatus for transmitting data to at least one of a plurality of receiving apparatuses (mobile station apparatuses) by a radio signal via a channel shared by the plurality of receiving apparatuses (mobile station apparatuses).
- the data allocation to the channel takes into account the processing delay from the time of reception quality measurement of each receiving device (each mobile station device) to the time of data transmission in the transmission device, and the future prediction regarding the reception quality at the time of data transmission.
- the receiving device (mobile station device) is selected based on the value. Therefore, it is possible to more accurately select the receiving apparatus (mobile station apparatus) having the best reception condition.
- the reception data error rate on the receiving apparatus (mobile station apparatus) side and retransmission of data due to the data error Rate can be reduced and throughput can be improved.
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Abstract
Description
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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EP03720954A EP1619912A4 (en) | 2003-04-25 | 2003-04-25 | TRANSMITTER FOR ALLOCATING DATA OF A RECEIVER SELECTED FROM MULTIPLE RECEIVERS TO A DIVIDED CHANNEL AND DATA ASSIGNMENT METHOD |
PCT/JP2003/005331 WO2004098225A1 (ja) | 2003-04-25 | 2003-04-25 | 複数の受信装置の中から選択した受信装置のデータを共有チャネルに割り当てる送信装置およびデータの割り当て方法 |
CNB03826367XA CN100464607C (zh) | 2003-04-25 | 2003-04-25 | 用于将选自多个接收装置的接收装置的数据分配给共享信道的发送装置 |
JP2004571284A JP4150002B2 (ja) | 2003-04-25 | 2003-04-25 | 複数の受信装置の中から選択した受信装置のデータを共有チャネルに割り当てる送信装置およびデータの割り当て方法 |
US11/151,486 US7492707B2 (en) | 2003-04-25 | 2005-06-13 | Transmitting device for assigning data for receiving device selected from plurality of receiving devices to shared channel |
Applications Claiming Priority (1)
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PCT/JP2003/005331 WO2004098225A1 (ja) | 2003-04-25 | 2003-04-25 | 複数の受信装置の中から選択した受信装置のデータを共有チャネルに割り当てる送信装置およびデータの割り当て方法 |
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US11/151,486 Continuation US7492707B2 (en) | 2003-04-25 | 2005-06-13 | Transmitting device for assigning data for receiving device selected from plurality of receiving devices to shared channel |
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US (1) | US7492707B2 (ja) |
EP (1) | EP1619912A4 (ja) |
JP (1) | JP4150002B2 (ja) |
CN (1) | CN100464607C (ja) |
WO (1) | WO2004098225A1 (ja) |
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Also Published As
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CN100464607C (zh) | 2009-02-25 |
US7492707B2 (en) | 2009-02-17 |
EP1619912A1 (en) | 2006-01-25 |
JPWO2004098225A1 (ja) | 2006-07-13 |
EP1619912A4 (en) | 2007-12-19 |
JP4150002B2 (ja) | 2008-09-17 |
US20050227716A1 (en) | 2005-10-13 |
CN1771750A (zh) | 2006-05-10 |
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