JP2006254390A - Wireless communication method, wireless communication system, terminal device and base station - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively utilize radio resources in a wireless communication system. <P>SOLUTION: A wireless communication method according to the present invention is used in a wireless communication system wherein a base station (1) and terminal devices (2-1 to 2-N) perform wireless communication. The base station (1) operates an absolute grant allowed for each of the terminal devices as a parameter when transmitting data from each of the terminal devices (2-1 to 2-N) to the present station, and each of the terminal devices corrects the absolute grant operated by the base station (1) by referring to maximum throughput of the present device and operates a corrected grant as a parameter when transmitting data from the present device to the base station (1). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a communication system in which a terminal and a base station perform wireless communication such as mobile communication, for example, and in particular, channel resources for data transmission from the terminal to the base station are allocated to the terminal by the base station. The present invention relates to a radio communication method, a radio communication system, a base station, and a terminal device assigned to the radio communication method.

  A first background art will be described for a wireless transmission system that performs allocation by a base station. For example, in a conventional wireless transmission system defined by 3GPP (3rd Generation Partnership Project), a wireless transmission base station (base station) is connected to a wireless transmission terminal (terminal) from a terminal by an allocation signal (Grant signal). Allocate the transmission rate and transmission power to the station. Then, the terminal transmits a packet signal with the upper limit of the allocation related to the transmission rate and transmission power notified by the allocation signal from the base station (see Non-Patent Documents 1, 2, and 3 below).

  In transmission of packets from this terminal to the base station (uplink packet transmission), hybrid ARQ (Hybrid Automatic Repeat Request: HARQ) is used, and the N-channel stop-and-wait protocol is used as the method ( Non-patent document 1 below). For example, in the case of an 8-channel stop-and-wait protocol, retransmission control is performed with 8 TTI (Transmission Time Interval) as one cycle. Here, 1 TTI is, for example, 2 msec or 10 msec.

  In addition, the radio transmission base station can perform so-called grouping in which the above allocation control is performed for a plurality of terminals (see Non-Patent Documents 1 and 3 below).

  Next, a second background art will be described for a wireless transmission system that performs allocation by a base station. FIG. 29 shows the communication operation of the “Enhanced Uplink” function studied in 3GPP. When there is a communication request, the terminal sends an allocation request to the base station (step S101). The scheduler installed in the base station selects a terminal to which channel resources are allocated in response to an allocation request from a plurality of terminals, and notifies the terminal of allocation (step S102). At this time, the base station notifies the allowable transmission rate (or transmission power) and the allocated time, and temporarily fixes the transmission rate. The allocated time may give a finite time, or may be used indefinitely at this stage.

  The allocated terminal freely selects a rate below the allowable transmission rate and performs data transmission (step S103). The base station returns an ACK to the terminal when the data has been correctly received and a NACK when a reception error is detected (step S104). Further, the scheduler can increase or decrease the allowable transmission rate (or transmission power) based on the change in the degree of channel congestion after the assignment notification, and this is executed by an UP / DOWN command (step S105).

  In this case, the terminal performs data transmission by freely selecting a rate below the increased or decreased transmission rate (step S106), and the base station returns ACK or NACK to the terminal in response to this data (step S106). S107). Furthermore, when the scheduler wants to end communication for the target terminal earlier than the allocation time, it notifies the allocation end (step S108). In “Enhanced Uplink”, there is a “Non Scheduled” mode in which transmission is possible at any time regardless of whether or not the transmission rate is very low.

3GPP TS25.309 V6.1.0 (2004-12) FDD Enhanced Uplink Overall description Stage2 (Release6) 3GPP TS25.212 V6.3.0 (2004-12) Multiplexing and channel coding (FDD) (Release6) 3GPP TS25.211 V6.3.0 (2004-12) Physical channels and mapping of transport channels onto physical channels (FDD) (Release6)

  In the conventional wireless transmission system described as the first background art, the transmission rate assigned by the base station to the terminal by the assignment signal (Grant signal) is determined without considering the processing capability of the terminal. There was a case where the transmission rate was excessive with respect to the processing capability of the terminal, and the operation on the terminal side in this case was not specified. As a result, there is a problem that the wireless resources of the system are wasted.

  Further, in the conventional wireless transmission system described as the second background art, the scheduler notifies the end of allocation in order to end communication earlier than the allocation time, but the terminal causes a reception error for the end of allocation. In this case, the terminal transmits data as before. This becomes an interference source for data transmission from other terminals which are properly assigned. In particular, when a terminal end receiving an allocation endless error after receiving an allocation for an infinite time, it becomes an interference source for a long time, so that the system performance is significantly reduced.

  The present invention has been made in view of the above, and an object of the present invention is to clarify the processing on the terminal side when excessive allocation to the terminal is performed. It is another object of the present invention to clarify assignment of transmission rates when a plurality of terminals are grouped in a base station.

  Furthermore, an object of the present invention is to realize a system in which system performance is not deteriorated even when a terminal has caused an allocation end reception error.

  In order to solve the above-described problems and achieve the object, a wireless communication method according to the present invention is a wireless communication method in a wireless communication system in which a base station and a terminal device perform wireless communication, and the base station An absolute assignment value calculation step for calculating an absolute assignment value allowed for the terminal device as a parameter when the terminal device transmits data to the own station, and an absolute assignment value calculated by the base station by the terminal device And a corrected allocation value calculation step of calculating a corrected allocation value which is a parameter when the apparatus transmits data to the base station. Features.

  According to the present invention, it is possible to effectively use radio resources in a radio communication system.

  Embodiments of a wireless communication method, a wireless communication system, a terminal device, and a base station according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
The first embodiment will be described with reference to FIGS. FIG. 1 is a diagram illustrating a radio interface related to a control signal between a base station and a terminal, FIG. 2 is a diagram illustrating an AG calculation mechanism included in the base station, and FIG. 3 is a channel coding included in the base station. FIG. 4 is a diagram illustrating a channel decoding circuit included in each terminal, FIG. 5 is a diagram illustrating a corrected AG calculation mechanism included in each terminal, and FIG. FIG. 7 is a diagram illustrating the correspondence between power and AG, FIG. 8 is a flowchart illustrating the operation of the corrected AG calculation mechanism, and FIG. FIG. 10 is a diagram illustrating a case where a corrected AG value is assigned to each HARQ channel, and FIG. 10 is a flowchart illustrating an operation of the AG calculation mechanism.

  The operation will be described. In FIG. 1, a base station 1 is a radio base station apparatus used in land mobile communication, and terminals 2-1, 2-2,..., 2-N are located in the cell of the base station 1, It is a mobile terminal that communicates with the base station 1 by a CDMA (Code Division Multiple Access) system.

  The basic operation is to notify terminals 2-1 to 2 -N using an E-AGCH (absolute grant channel), an allocation signal including information on a transmission rate, which is a parameter that the base station 1 allows for each terminal. The terminal transmits packet data on the uplink (in the direction from the terminal to the base station) within the range of the assigned signal. In this embodiment, the uplink transmission rate assigned to each terminal from the base station is assumed to be an absolute assignment value AG (Absolute Grant). The base station 1 uses uplink power and scheduling information (Scheduling information) from the terminal in order to transmit this AG by E-AGCH.

  First, the terminal 2-1 transmits, as scheduling information, a request for data transmission on the uplink. The same applies to the other terminals 2-2 to 2-N.

  The base station 1 measures the sum of received power from all terminals by using an unillustrated uplink power measurement mechanism and sets it as uplink power. The uplink power is a level of the total power received in a predetermined (for example, 5 MHz) band of the uplink of the base station. As shown in FIG. 2, the uplink power is input to the maximum allocated power estimator 6 of the AG calculation mechanism 5 in the base station 1 to estimate the maximum allocated power. This is because, as shown in FIG. 6, by estimating the combined value α such as interference from other cells, noise such as thermal noise, and interference within the own cell from the uplink power, and removing it from the uplink power can get. This procedure is described in, for example, “3GPP TR25.896 V6.0.0 Feasibility Study for Enhanced Uplink for UTRA FDD Sec. 7.1.2.3”. The maximum allocated power is allocated to each terminal as terminal allocated power according to a predetermined rule such as equal distribution to terminals in communication.

  Next, in the power / AG converter 7 of the AG calculation mechanism 5, the terminal allocated power (power) obtained by the maximum allocated power estimator 6 is converted into an absolute value AG ( Absolute Grant). The absolute allocation value AG has a transmission rate dimension of bps (bits / second), and takes a value of 0 to 63. For a change of 1 dB in power, AG corresponds to a change of one step. Therefore, when α in FIG. 6 is large, AG has a small value. Conversely, when α is small, AG has a large value. The above operation is as outlined in FIG. 10 (steps S11 to S13), and the operation in FIG. 10 is the absolute assigned value calculation step in the present invention. The output of the power / AG converter 7 in FIG. 2 is supplied as an absolute assigned value AG to the channel coding circuit 8 of the base station 1 shown in FIG.

  The channel coding circuit 8 shown in FIG. 3 is a circuit that performs predetermined processing on the AG and maps it to the physical channel E-AGCH (absolute grant channel). First, the ID specific CRC adder 9 adds an identifier (terminal ID) predetermined for each terminal, and then adds a CRC. CRC addition is a mechanism for recognizing whether the information is correctly transmitted in the terminal, and is a well-known technique in wireless transmission. The CRC added by the ID specific CRC adder 9 is generated from data including an AG and a terminal ID, and transmits the CRC and the AG of each terminal to each terminal.

  Each terminal generates a CRC from the received AG and its own ID in the same procedure as the ID specific CRC adder 9, and determines that the received data is correct when it matches the CRC transmitted by the E-AGCH. If not, it is determined that there is an error in the received data. The ID specific means that an individual ID is used for each ID. Therefore, information having a different ID becomes “CRC NG” at the terminal, and is thus correctly demodulated only at the desired terminal. The ID may be commonly used for a plurality of terminals. In this case, the same AG contents are notified to the grouped terminals. In this example, since the AG is 6 bits and the CRC is 16 bits, the number of output bits is 22. The output of the ID specific CRC adder 9 is supplied to the channel encoder 10.

  The channel encoder 10 performs convolutional encoding with a constraint length of 9 and a rate of 1/3. Details of this encoding are described in “3GPP TS25.212 V6.3.0 Sec.4.2.3.1” and are well known. The number of output bits is 3 × {22+ (9-1)} = 90 bits. The output of the channel encoder 10 is supplied to the rate matcher 11.

  The rate matching unit 11 performs an operation for adjusting the data length to the number of physical channel bits of E-AGCH. Since the physical data for 1 TTI is 120 bits, here, rate matching from 90 bits to 120 bits (repetition of 30 bits) is performed. This is also described in “3GPP TS25.212 V6.3.0 Sec4.2.7” and is well known. This output is subjected to QPSK mapping with SF (spreading factor) = 128 and slot length 3 in the physical channel mapper 12 and transmitted as a physical channel E-AGCH (absolute assignment value notification step).

  The terminal performs the reverse operation of the base station 1 until it receives the E-AGCH and acquires the AG. Thereafter, correction using the maximum processing capability of the terminal is a feature of the present invention. The maximum processing capability of the terminal means the capability that a data processing mechanism (not shown) can use for processing for transmission of uplink data, out of all the data processing capabilities of the terminal, and has a dimension of bps (bits / second). Have

  In the channel decoding circuit 13 of each terminal shown in FIG. 4, the physical channel demapper 14 performs the reverse operation of the physical channel mapper 12, the rate dematching 15 performs the reverse operation of the rate matcher 11, and the channel decoder. 16 performs the reverse operation of the channel encoder 10, and the ID specific CRC detector 17 performs the reverse operation of the ID specific CRC adder 9. As already explained, when the CRC matches, it is a notification addressed to itself. Further, it is determined that the information has been correctly notified, and the subsequent processing is performed. On the other hand, if the CRCs do not match, it is determined that the notification is not addressed to itself or that the information is notified in error, and the subsequent processing is not performed. In this case, the process is repeated until the next E-AGCH is received. The output of the ID specific CRC detector 17 is supplied as a signal AG to the corrected AG calculation mechanism 18 shown in FIG.

  The AG input to the corrected AG calculation mechanism 18 shown in FIG. 5 is calculated using the maximum processing capacity Δ of the terminal itself, and as a result, corrected AG (corrected AG) is obtained.

  The calculation procedure of the corrected AG calculation mechanism 18 is as shown in FIG. 8. First, the AG and the maximum processing capability (maximum processing capability) Δ of the terminal are input (step S1). Next, the inputted maximum processing capacity Δ and AG are compared (step S2), and if the maximum processing capacity Δ is larger than AG, AG is directly used as the corrected AG (step S3). If AG is greater than the maximum processing capacity Δ, the maximum processing capacity Δ is set as the corrected AG (step S4), and then the corrected AG is output for any corrected AG value (step S5). .

  For example, when AG is 20 and Δ = 16, AG = 16 after correction, and outputs {16, 16, 16, 16, 16, 16, 16, 16} in the order of HARQ channels (see FIG. 9). A wireless transmission mechanism (not shown) included in each terminal transmits transmission data to the base station through a predetermined data transmission channel at a transmission rate 16 with reference to the corrected AG (data transmission step). When AG is 20 and Δ = 24, AG = 24 after correction and {24, 24, 24, 24, 24, 24, 24, 24} are output in the order of the HARQ channel, and the radio transmission mechanism corrects. Thereafter, the transmission data is transmitted to the base station at the transmission rate 24 with reference to the AG. The operation in FIG. 8 corresponds to the corrected assigned value calculation step in the present invention.

  Each terminal notifies the base station 1 of the corrected AG obtained by the above procedure. In the system based on the 3GPP standard, for this notification, for example, E-DPCCH (Dedicated Physical Control Channel) which is a control channel is used. The base station 1 that has received the notification determines that the AG (Grant value) notified to the terminal is larger than the corrected AG, that is, if the allocated AG is excessive with respect to the processing capacity of the terminal. The AG that matches the processing capability of the terminal is allocated, and the surplus radio resources are allocated to other terminals.

  The transmission rate from the terminal has a predetermined relationship with the transmission power from the terminal, and generally the transmission rate increases when the transmission power is large.

  In the above description, the AG calculation mechanism 5 is a process (absolute assignment value calculation step shown in FIG. 10) executed by a circuit such as an FPGA (Field Programmable Gate Array), a DSP (Digital Signal Processor), or a CPU. ). In FIG. 3, an ID (identifier) specific CRC (Cyclic Redundancy Check) adder 9, a channel encoder 10, a rate matching unit 11, and a physical channel mapper 12 are also circuits or software such as FPGA and DSP. In FIG. 4, the physical channel demapper 14, the rate dematcher 15, the channel decoder 16, and the ID specific CRC detector 17 are also circuits or software such as FPGA and DSP. In FIG. 5, the post-correction AG calculation mechanism 18 is also software such as a circuit such as an FPGA or DSP or the process shown in FIG. 8 (post-correction assigned value calculation step).

  As described above, in this embodiment, the uplink transmission rate is determined by correcting the AG, which is the transmission rate allowed from the base station, based on the maximum processing capability of the terminal. Thereby, radio resources can be used effectively. Further, since the data transmission method is uniform in the HARQ channel, the uplink interference power can be reduced and the system throughput can be improved. Further, since the processing amount for each channel is smoothed, it is possible to achieve base station processing distribution. Similarly, a margin for the maximum transmission power of the terminal can be secured. Note that the numerical values used in the present embodiment are merely examples, and the same effects as in the present embodiment can be obtained even with other numerical values.

Embodiment 2. FIG.
Next, the second embodiment will be described with reference to FIGS. In the first embodiment described above, transmission of the uplink packet channel is made uniform on the time axis, and only the absolute assignment value (AG) is used as the base station assignment. In this embodiment, The relative allocation value (RG) is also used.

  FIG. 11 is a diagram illustrating a radio interface related to a control signal between the base station and the terminal. The difference from FIG. 1 of the first embodiment described above is that the base station 1 changes to the terminals (2-1 to 2-N). On the other hand, E-RGCH (relative grant channel) is added. 12 is a diagram illustrating a scheduler included in the base station, FIG. 13 is a diagram illustrating an RG / E-RGCH conversion mechanism included in the base station, and FIG. 14 is an E-RGCH / transmission mechanism included in the terminal. 15 is a diagram illustrating an RG conversion mechanism, FIG. 15 is a diagram illustrating a corrected AG calculation mechanism included in a terminal, FIG. 16 is a diagram illustrating transmission power allocation to a plurality of terminals, and FIG. FIG. 18 is a flowchart showing the operation of the scheduler, and FIG. 18 is a flowchart showing the operation of the scheduler.

  Next, the operation will be described. The parts related to E-AGCH are the same as those in the first embodiment, and the description thereof will be omitted. Here, E-RGCH (relative grant channel) will be mainly described.

  As a basic operation, the base station 1 notifies the terminals 2-1 to 2-N of two types of allocation signals using E-AGCH and E-RGCH, and each terminal is in the range of the allocation signals. Transmit packet data to the line. The E-RGCH transmits a relative allocation value RG that finely adjusts the absolute allocation value AG transmitted by the E-AGCH. The content of the E-RGCH is {+1, 0, −1}, but the transmission frequency is higher than that of the E-AGCH, but is not particularly limited. For example, it may be every 8 channels of HARQ.

  Here, base station 1 completes the notification of absolute allocation value AG to the terminal in the same procedure as in the first embodiment, and each terminal further performs the corrected AG in the same procedure as in the first embodiment. Is generated.

  In the base station 1, using the scheduling information from each terminal, the scheduler 21 performs scheduling as shown in FIG. 12, and outputs the result as RG # 1, RG # 2,. (Relatively assigned value calculation step). RG is a 1-bit signal. For example, +1 is an allocation that increases the transmission rate by a predetermined amount (for example, an amount corresponding to power +1 dB), 0 is unchanged, and -1 is an allocation that decreases the transmission rate by a predetermined amount ( For example, an amount corresponding to -1 dB).

  The scheduler 21 performs allocation within the range of the maximum allocated power in FIG. For example, as shown in FIG. 16, when there are two terminals (2-1, 2-2) and the allocated power of the terminal (UE) 2-1 is increased, the allocated power of the terminal 2-1 is increased. Therefore, the allocated power of the terminal 2-2 is reduced by a corresponding amount (RG # 1 = + 1) (RG # 2 = -1). Further, when the allocation of the terminal 2-1 is decreased, the allocated power of the terminal 2-2 is increased (RG # 2 = + 1) by the amount (RG # 1 = −1) of the allocated power of the terminal 2-1. . However, the amount of change in the allocated power once is limited to a predetermined power (for example, 1 dB). In this example, two terminals have been described for convenience of explanation, but the same applies to three or more terminals. When the allocated power of any terminal is increased, the allocated power of any other terminal is decreased. . That is, the power used for allocation (maximum allocated power) is scheduled (distributed to a plurality of terminals) by a plurality of terminals.

  Whether to instruct each terminal to increase or decrease the transmission rate is determined by the buffer state of each terminal. For example, a terminal having a sufficient buffer capacity is instructed to increase the transmission rate (RG = + 1), and a terminal having a relatively large buffer capacity is instructed to decrease the transmission rate (RG = -1). . The RG (RG # 1, RG # 2,...) For each terminal determined by the scheduler 21 is supplied to the signature sequence converter 23 of the RG / E-RGCH conversion mechanism 22 shown in FIG.

  The signature sequence converter 23 converts a 1-bit RG signal into a 40-bit signature. This signature sequence is described in TS25.212V6.3.0, and is composed of 40 types of sequences that are orthogonal to each other. This output is converted into a one-slot length signal and supplied to the repetition / code hopping 24. The repetition / code hopping unit 24 converts 1 slot data into 3 slots. As a method of conversion, for example, when repetition is selected, the output of the signature sequence converter 23 is repeated for three slots. If code hopping is selected, the signature sequence is changed according to a predetermined hopping rule. This output is supplied to the physical channel mapper 25. The physical channel mapper 25 maps the data to QPSK data having a length of 3 slots of SF = 128, and transmits it to the terminal as an E-RGCH (relative assignment value notification step).

  In the terminal, the reverse operation of the base station is performed until E-RGCH is received and RG is acquired. 14, in the E-RGCH / RG conversion mechanism 26, the physical channel demapper 27 performs the reverse operation of the physical channel mapper 25, and the synthesis / code dehopper 28 performs the reverse operation of the repetition / code hopper 24. The RG extractor 29 performs the reverse operation of the signature sequence converter 23. In the E-RGCH, user separation is performed according to a signature. Signatures are shared for grouping terminals. The period of the signature is 1 slot. When the base station expands this 1-slot data to 3 slots, the combining / code de-hopping unit 28 performs the combining if it is performing simple repetition and performs code hopping every slot. Performs an operation to solve this pattern. Which is used is determined in advance by the network. The output of the RG extractor 29 is supplied as a relative allocation value RG to the corrected AG calculation mechanism 30 shown in FIG.

  The corrected AG calculation mechanism 30 outputs the corrected AG using the absolute allocation value AG notified from the base station 1 in addition to the RG and the maximum processing capability Δ of the terminal. This operation will be described with reference to the flowchart of FIG. First, the maximum processing capacity (maximum processing capacity) Δ of the terminal is input (step S41), and then it is determined whether or not AG is input (step S42), and RG is input without input of AG (Step S42, No, Step S43, Yes), RG is added to the corrected AG so far to obtain a new AG (Step S44). Thereafter, as in the first embodiment, the corrected output AG is calculated by comparing the maximum processing capacity and AG (step S45) (step S46, step S47), and the corrected AG is output (step S48). Also, when AG is input (step S42, Yes), the corrected AG is output by the procedure of steps S45 to S48, as in the first embodiment. When neither AG nor RG is input (step S42, No, step S43, No), the process returns to step S42 again and waits for input. The operation of FIG. 17 is the corrected assigned value calculation step in the present invention.

  For example, in the terminal having the maximum processing capacity Δ = 20, when corrected AG = 20 and RG = −1 is input, the corrected AG is 19. Further, when the corrected AG = 20 and RG = + 1 is input, the corrected AG is 20. For the HARQ channel, for example, {19, 19, 19, 19, 19, 19, 19, 19, 19} is output in the former case, and {20, 20, 20, 20, 20, in the latter case. 20, 20, 20} is output. In this case, a wireless transmission mechanism (not shown) included in each terminal transmits transmission data to the base station at a transmission rate 19 or 20 with reference to the corrected AG.

  In the above description, the scheduler 21 is a circuit that implements a circuit such as an FPGA or DSP, or a process (steps S51, S52, and S53) as shown in FIG. Also, the signature sequence converter 23, the repetition / code hopping unit 24, and the physical channel mapper 25 shown in FIG. 13 are circuits or software such as FPGA and DSP. The physical channel demapper 27, the synthesis / code dehopping unit 28, and the RG extractor 29 shown in FIG. 14 are also circuits or software such as FPGA and DSP. 15 is also a circuit such as an FPGA or DSP or software as shown in FIG.

  As described above, in the present embodiment, transmission rate allocation to each terminal is performed by using, as an example, the buffer status of the terminal as an index for prioritization, so that allocation according to the necessity of the terminal is possible. Effective use of radio resources becomes possible. Further, each terminal determines the transmission rate based on the processing capability of the terminal, and the transmission process is uniformized in the HARQ channel, so that the uplink interference power can be reduced and the system throughput can be improved. Further, since the processing amount for each channel is smoothed, it is possible to achieve base station processing distribution. Similarly. A margin for the maximum transmission power of the terminal can be secured.

  In the above example, an example is shown in which the terminal is instructed to increase or decrease the transmission rate based on the buffer status of the terminal. However, transmission is not limited to the buffer status but based on the transmission power margin of the terminal. The rate may be instructed up and down, and in this case, the same effect as in the above embodiment can be obtained. Further, the numerical values used in the present embodiment are merely examples, and the same effects as in the present embodiment can be obtained even with other numerical values.

Embodiment 3 FIG.
Subsequently, Embodiment 3 will be described with reference to FIG. In the first and second embodiments described above, an example in which the transmission of the uplink packet channel is uniform in the time axis direction is shown, but in this embodiment, an example in which the transmission is thinned is shown.

  FIG. 19 is a diagram for explaining the transmission timing in the third embodiment. The configurations of base station 1 and terminals 2-1, 2-2,..., 2-N described in the first embodiment are the same in the third embodiment. Further, in the present embodiment, an example is shown in which the transmission rate assigned as an absolute assignment value (AG) from a base station to a certain terminal exceeds the maximum processing capacity of that terminal. The difference from Embodiment 1 is that the timing of transmitting data to the base station by a wireless transmission mechanism (not shown) included in the terminal is as shown in FIG. 19 instead of FIG. 9 described above. .

  For example, when the absolute assignment value AG assigned to the terminals (2-1 to 2-N) exceeds the maximum processing capability Δ of the terminal, the terminal processes the transmission data at the speed of the maximum processing capability Δ. However, in the wireless transmission mechanism, every time the amount of transmission data processed by the terminal reaches a predetermined amount, it is transmitted to the base station 1 with the absolute terminal allocation value AG.

  In FIG. 19, when the maximum processing capacity Δ of the terminal is ½ of the terminal allocation value AG, a packet is transmitted once every time processing of two channels of the HARQ channel is completed, that is, every other HARQ channel. Represents what to do. The HARQ channel # 1 (CH # 1) and channel # 2 (CH # 2) packets for which transmission processing has been completed are transmitted to the base station 1 by “transmission # 1” in the figure. Each time transmission processing for two channels is completed, transmission # 2, transmission # 3, and transmission # 4 are transmitted.

  In this case, the maximum processing capacity Δ is smaller than the absolute allocation value AG allocated to the terminal, but by thinning out the transmission (transmission # 1 to 4 in the figure), the same amount of packet data as in the first and second embodiments is obtained. Can be sent.

  Further, even if the processing capability per terminal unit time does not change, a large amount of data processing can be performed by increasing the processing time. In FIG. 19, by doubling the unit time of processing, it is possible to process more data, thereby transmitting the same amount of data as in the first embodiment.

Embodiment 4 FIG.
Subsequently, Embodiment 4 will be described with reference to FIG. In the third embodiment described above, for example, when the absolute allocation value AG allocated to the terminal (2-1 to 2-N) exceeds the maximum processing capability Δ of the terminal, the radio transmission mechanism of the terminal is Although an example in which packet transmission to a station is thinned out at equal intervals is shown, this embodiment shows an example in which data (packets) subjected to transmission processing is stored in a buffer and then continuously transmitted. Other conditions are the same as those in the third embodiment. The difference between the present embodiment and the third embodiment described above is that the data transmission timing of a wireless transmission mechanism (not shown) is as shown in FIG. 20 instead of FIG.

  For example, when the absolute assignment value AG assigned to the terminal (2-1 to 2-N) exceeds the terminal maximum processing capacity Δ of the terminal, the terminal processes the transmission data at the speed of the maximum processing capacity Δ. However, the radio transmission mechanism accumulates transmission data processed by the terminal in a buffer, and transmits it to the base station 1 with the absolute terminal allocation value AG every time the buffer amount reaches a predetermined amount.

  In FIG. 20, when the maximum processing capacity Δ of the terminal is ½ of the terminal allocation value AG, the HARQ channel is processed every two channels and accumulated in the buffer, and the processing of the channel # 5 (CH # 5) is completed. Sometimes the data of CH # 1 and CH # 2 is transmitted by “transmission # 1”, and thereafter, every time the terminal completes the transmission processing of two channels, transmission # 2, transmission # 3, and transmission # 4 are transmitted. Send. However, the packets of CH # 7 and CH # 8 are transmitted without being stored in the buffer.

  Considering the processing capability of the terminal in terms of time rate, even if data is first processed from the top by parallel processing or the like and the remaining processing is turned off, the processing amount does not change. In FIG. 20, by doubling the processing unit time, it is possible to process more data, thereby transmitting the same amount of data as in the first embodiment.

  Further, the transmission timing may be random as shown in FIG. In FIG. 21, the packets of CH # 1 and # 2 are transmitted by “transmission # 1”, but in this case, it is not necessary to store the packets in the buffer. The packets of CH # 3 and # 4 are transmitted by transmission # 2, and the packets of CH # 5 and # 6 are transmitted by transmission # 3. In this case, the packets are stored in the buffer. The packets of CH # 7 and # 8 are transmitted by transmission # 4 without being accumulated in the buffer.

  In this case, since transmission is performed at random in the HARQ channel, the delay until data transmission is completed can be reduced. Further, similarly to the first embodiment, it is possible to reduce the uplink interference power, improve the system throughput, distribute the processing of the base stations, and secure a margin for the maximum transmission power of the terminal. Note that the numerical values used in the present embodiment are merely examples, and for example, the same effects as in the present embodiment can be obtained even with other numerical values.

Embodiment 5. FIG.
Next, Embodiment 5 will be described with reference to FIG. In the first to fourth embodiments described above, the example in which the absolute allocation value AG allocated to the terminals (2-1 to 2-N) is corrected in consideration of the maximum processing capability Δ of the terminal has been described. An example of transmission when “Time Duration (allocation time)” is given to the terminal is shown. The configurations of base station 1 and terminals 2-1, 2-2,..., 2-N described in Embodiment 1 are the same in this embodiment. The difference from the first embodiment is that the information input to the corrected AG calculation mechanism 18 (FIG. 5) is different, and the operation flowchart of the corrected AG calculation mechanism 18 is FIG. 22 instead of FIG. It is.

  For example, if a finite length of time that can be used by the terminals (2-1 to 2-N) as well as the transmission rate (or transmission power) is given from the base station 1 to the AG, the terminal is assigned an excessive allocation value. When (AG) is given, transmission can be performed at a lower transmission rate by using the above-mentioned finite length of time. In this case, the maximum processing capacity Δ of the terminal is not considered.

  Here, the operation of the present embodiment will be described. Assume that the absolute allocation value AG, which is the transmission rate, is notified to the terminal in advance by the same procedure as in the first embodiment.

  First, the data amount (B), transmission rate (AG), time duration (τ), constants ρ, and D accumulated in the buffers of the terminals (2-1 to 2-N) are input to the corrected AG calculation mechanism 18. (Step S55). Here, Time Duration (τ) is a finite length of time that the terminal may occupy the uplink (uplink occupancy time), and is allocated in units of TTI. Have been notified. The constant ρ is a constant for determining whether or not the absolute allocation value (AG) is excessive, and may be determined in advance by each terminal or may be notified from the base station 1. Furthermore, the constant D is a correction value for the AG when the allocation is excessive, and is notified from the base station in advance.

  Next, it is determined whether or not the assigned transmission rate (AG) is excessive (step S56). Here, the determination is performed using AG × τ ≧ ρ × B. Here, the left side is obtained by multiplying the assigned value AG of the base station 1 and Time Duration (τ), while the right side is obtained by multiplying the amount of data accumulated in the terminal buffer by a constant ρ. If ρ is 1, the amount of data stored in the terminal buffer indicates that the allocated AG can be transmitted during the time duration. Here, it is determined that the allocation is “excessive” when ρ = 2 and AG × τ is larger than twice the buffer amount accumulated in the terminal. Note that τ is 8 TTI.

  For example, if the determination result is Yes, the corrected AG is obtained by subtracting D from AG (step S57). D is a correction value for AG when the allocation is excessive, for example, a value that makes the transmission rate ¼ (or -6 dB in the case of transmission power). The value of D is notified from the network in advance to the terminal as described above, like other values (for example, 1/8). If the determination result is No, the corrected AG value remains AG (step S58).

  For example, if the amount of data accumulated in the buffer is 8000 bits, the time duration is 8 TTI, AG is 2000 bits, and the correction value D is 1/4, 2 (ρ) × 8000 (B) ≧ 2000 (AG) × 8 (τ) As a result, the allocation becomes “excessive” and is corrected to AG = 500.

  In this way, it is determined whether or not the allocation is excessive based on the amount of data accumulated in the buffer of the terminal, the allocated AG, and the time duration, and a value lower than the transmission power (transmission rate) scheduled by the base station Therefore, it is possible to reduce the margin for noise rise prepared for uplink interference, and to allocate that amount to non-scheduled transmission or the like. Therefore, the uplink interference power can be further reduced, the system throughput can be improved, the base station processing can be distributed, and a margin for the maximum transmission power of the terminal can be secured.

  Note that the numerical values used in the present embodiment are merely examples, and the same effects as in the present embodiment can be obtained even with other numerical values. In the above example, the AG correction is performed using the data amount accumulated in the terminal buffer, but other parameters may be used. Further, in the above description, the time duration (τ) has been described as a finite length of time that the terminal may occupy the uplink, but there is retransmission data that has not completed transmission within the time duration. May be retransmitted after the time duration expires.

Embodiment 6 FIG.
Next, Embodiment 6 will be described with reference to FIG. In the present embodiment, an example of a countermeasure when a terminal causes an allocation end signal reception error is shown. In the present embodiment, one or a plurality of terminals correspond to the base station, and wireless communication is performed, for example, by a CDMA system through a predetermined uplink transmission channel and downlink transmission channel.

  FIG. 23 shows the operation of the sixth embodiment. Prior to this, it is assumed that the terminal transmits an allocation request to the base station by the allocation request transmission mechanism, and the base station has performed allocation notification including the transmission rate and allocation time determined by the scheduler.

  When the terminal transmits data to the base station by the data transmission mechanism (step S61), the base station determines success or failure of data reception by the ACK / NACK determination mechanism and transmits an ACK / NACK signal to the terminal (step S61). S62). The base station transmits an allocation end signal when the scheduler determines that it is necessary to end the terminal transmission earlier than the allocation time notified to the terminal first (step S63). In addition, it includes the case where the allocation of infinite time is first notified and then the terminal transmission is terminated at an appropriate timing.

  In the present embodiment, when an allocation end reception error occurs, the terminal measures the arrival of ACK / NACK for the subsequent data transmission (step S64, step 65) by the ACK / NACK measurement mechanism. If no ACK / NACK is returned N times consecutively for data transmission, the terminal autonomously determines the end of allocation. Actually, since it is impossible for the terminal to determine whether there is a reception error at the end of allocation, the presence / absence of ACK / NACK for data transmission is always measured. The terminal that has determined the end of allocation notifies the base station of this fact using the “Non Scheduled” mode (step S66). This notification may be performed as a physical layer signal or a MAC layer signal.

  In the terminal, ACK / NACK does not arrive because (1) the base station does not return ACK / NACK because the allocation is completed, and (2) although the base station returns ACK / NACK. There is a case where ACK / NACK does not arrive at the terminal due to poor quality of the wireless line. Accordingly, the scheduler of the base station that has received the notification of the end of assignment from the terminal determines that the case is (2) and does the reassignment when not instructing the end of assignment. If it is determined to be the case (1), it is not necessary to take special measures.

  FIG. 24 is a simple block diagram of the apparatus according to the present embodiment. The transmission data buffer 41 of the terminal holds data to be transmitted. The transmission power monitor unit 42 monitors the remaining amount of transmission power that can be used for data transmission, excluding the power used for notification of control information other than data transmission. The transmission control unit 43 notifies the base station of the amount of data in the buffer and the status of the remaining transmission power via the transmission unit 44. In the base station, the scheduler unit 52 collects the information of the terminal through the receiving unit 51. The scheduler unit 52 selects a terminal to which channel resources are allocated based on the collected information and the degree of congestion of the radio line. Further, the transmission power allowed for the allocation terminal is determined, and further, the allocation time is determined. The determined information is notified to the corresponding terminal through the transmission unit 53. In the terminal, the transmission control unit 43 analyzes the allocation information via the reception unit 45 and performs data transmission according to the allowable transmission power. At the time of data transmission, the transmission unit 44 reads data from the transmission data buffer 41, performs predetermined modulation processing, and transmits the data. Further, since ACK / NACK is returned from the base station, the transmission control unit 43 determines whether to perform retransmission or transmit new data according to the result. Furthermore, in response to an UP / DOWN command sent from the base station, the transmission control unit 43 notifies the transmission unit 44 of a change in allowable transmission power. In the base station, ACK or NACK is returned from the transmission unit 44 according to the reception result of data transmission from the terminal. In addition, the scheduler unit 52 determines to transmit a transmission power UP / DOWN command to the corresponding terminal based on changes in the congestion level of the wireless line, the amount of data in the terminal, and the remaining transmission power.

  Further, the ACK / NACK measuring unit 46 of the terminal receives the result of the receiving unit 45 and monitors whether ACK or NACK is returned. The transmission control unit 43 notifies the ACK / NACK measurement unit 46 of that every time data is transmitted. When the ACK / NACK measurement unit 46 receives the data transmission notification, the ACK / NACK measurement unit 46 monitors the ACK / NACK return, and stores the ACK / NACK if it is not returned at a prescribed timing. Further, when ACK / NACK is not returned N times consecutively, the ACK / NACK measurement unit 46 notifies the transmission control unit 43 of the occurrence of the event. Receiving the event occurrence notification, the transmission control unit 43 autonomously determines the end of allocation due to the absence of ACK / NACK return, and instructs the base station to transmit the end determination notification.

  According to the form shown in FIG. 24, even when an error occurs in receiving the allocation end notification, the terminal autonomously determines the end, and thus data transmission is erroneously continued, and data transmitted by other terminals is transmitted. It can be prevented that it becomes an interference source. Furthermore, since the base station is notified of the termination determination autonomously, even if the termination determination is erroneously made, the communication can be recovered again.

  FIG. 25 shows another form of the sixth embodiment. Here again, it is assumed that, prior to this, the terminal transmits an allocation request to the base station by the allocation request transmission mechanism, and performs allocation notification including the transmission rate and allocation time determined by the scheduler of the base station.

  In this mode, the scheduler in the base station determines the occurrence of an allocation end reception error in the terminal and retransmits the allocation notification. In FIG. 25, since the terminal has caused a reception error with respect to the allocation end signal transmitted by the base station (step S73), data transmission by the terminal continues (step S74). The base station that has finished allocating continues to receive data from the terminal. Therefore, when the terminal is transmitting data at a rate exceeding the transmission rate allowed in the “Non Scheduled” mode, the base station sends the end of allocation again (step S75). Further, at this time, the base station may transmit the end of allocation continuously in order to surely execute the end of allocation (steps S76 and S77). The transmission rate used by the terminal is not shown in the figure, but is notified by a control signal sent immediately before data transmission.

  FIG. 26 is a simple block diagram of the apparatus according to the present embodiment. The configuration is almost the same as that shown in FIG. The difference is that there is no ACK / NACK measurement unit shown in FIG. In the present invention, when the scheduler unit 52 determines that the data transmission is continuously performed from the corresponding terminal after transmitting the allocation signal, the allocation end is transmitted again via the transmission unit 53.

  According to the form shown in FIG. 26, even if an error occurs in reception of the allocation end notification, the base station predicts a reception error in the terminal and notifies the allocation end again, so that erroneous data transmission by the terminal Can be minimized, and it can be prevented from becoming an interference source for data transmitted by other terminals. Further, in the present invention, since the determination of the occurrence of reception error is completed at the base station, it is not necessary to prescribe the processing between the base station and the terminal.

  FIG. 27A and FIG. 27B show still another form in the present embodiment. In this mode, when the terminal receives the end of allocation, it returns an ACK for the end of allocation (see FIG. 27-1). FIG. 27-2 shows an operation in the case where an error occurs at the end of allocation reception. When a terminal end reception error occurs (step S91), the terminal continues data transmission (step S92). The base station waits for an end ACK. However, since the end ACK does not arrive within the time specified from the end of allocation transmission, it is predicted that an allocation end reception error has occurred, and the end of allocation is sent again (step S93). . Further, at this time, the base station may transmit the end of allocation continuously in order to surely end the allocation (step S94, step S95). This end ACK is sent using the “Non Scheduled” mode described above.

  27A and 27B can be realized by the block configuration shown in FIG. The difference from the invention described with reference to FIG. 26 is that the transmission control unit 43a of the terminal issues an instruction to transmit an end ACK within a prescribed timing at the time of allocation end reception, and ends in the scheduler unit 52 of the base station. Determining whether or not an ACK has been received.

  According to the form shown in FIGS. 27-1 and 27-2, transmission / reception of end ACK and its timing are defined. Therefore, when an error occurs in reception of the allocation end notification, the base station can easily determine the occurrence, and can quickly retransmit the allocation end.

  FIG. 28 shows still another form of the sixth embodiment. Here again, it is assumed that, prior to this, the terminal transmits an allocation request to the base station by the allocation request transmission mechanism, and performs allocation notification including the transmission rate and allocation time determined by the scheduler of the base station.

  In this mode, the scheduler in the base station sends a plurality of DOWN commands in advance in preparation for a reception error at the end of allocation as described in FIG. 23, FIG. 25 or FIG. After sending the end of allocation (step S83), the base station sends a DOWN command multiple times (step S84, step S85, step S86), and the allowable transmission rate is below the level allowed in the “Non Scheduled” mode, Or lower to zero.

  The configuration shown in FIG. 28 can also be realized by the block configuration shown in FIG. The difference from the invention described with reference to FIG. 26 is that the scheduler unit 52 sends a DOWN command a plurality of times after the assignment completion transmission.

  According to the form shown in FIG. 28, the base station transmits a DOWN command continuously after the end of allocation transmission. Thereby, the transmission of the terminal station can be stopped reliably.

  As described above, the radio communication method according to the present invention is useful for a communication system in which a terminal and a base station perform radio communication like mobile communication, and in particular, channel resources for data transmission from the terminal to the base station. Is suitable for a radio transmission system, a terminal device and a base station.

It is a figure which shows the radio | wireless interface regarding the control signal between the base station and terminal in this invention. It is a figure which shows AG calculation mechanism contained in the base station in this invention. It is a figure which shows the channel coding circuit contained in the base station in this invention. It is a figure which shows the channel decoding circuit contained in each terminal in this invention. It is a figure which shows the AG calculation mechanism after correction | amendment contained in each terminal in this invention. It is explanatory drawing of the maximum allocation electric power estimation operation | movement in the base station in this invention. It is a figure which shows the response | compatibility of electric power and AG in this invention. It is a flowchart which shows operation | movement of the AG calculation mechanism after correction | amendment in this invention. It is a figure which shows the case where the AG value after correction | amendment in this invention is allocated to each channel of HARQ. It is a flowchart which shows operation | movement of AG calculation mechanism in this invention. It is a figure which shows the radio | wireless interface regarding the control signal between the base station and terminal in this invention. It is a figure which shows the scheduler contained in the base station in this invention. It is a figure which shows the RG / E-RGCH conversion mechanism contained in the base station in this invention. It is a figure which shows the E-RGCH / RG conversion mechanism contained in the terminal in this invention. It is a figure which shows the AG calculation mechanism after correction | amendment contained in the terminal in this invention. It is a figure which shows transmission power allocation to the some terminal in this invention. It is a flowchart which shows operation | movement of the AG calculation mechanism after correction | amendment in this invention. It is a flowchart which shows operation | movement of the scheduler in this invention. It is a figure for demonstrating the transmission timing in this invention. It is a figure for demonstrating the transmission timing in this invention. It is a figure for demonstrating the transmission timing in this invention. It is a flowchart which shows operation | movement of the AG calculation mechanism after correction | amendment in this invention. It is a figure which shows operation | movement of the base station and terminal in this invention. It is a block diagram which shows the apparatus structure in this invention. It is a figure which shows operation | movement of the base station and terminal in this invention. It is a block diagram which shows the apparatus structure in this invention. It is a figure which shows operation | movement of the base station and terminal in this invention. It is a figure which shows operation | movement of the base station and terminal in this invention. It is a figure which shows operation | movement of the base station and terminal in this invention. It is a figure which shows operation | movement of the base station and terminal in a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base station 2-1, 2-2, 2-N terminal 5 AG calculating mechanism 6 Maximum allocation power estimator 7 Power / AG converter 8 Channel coding circuit 9 ID specific CRC adder 10 Channel encoder 11 Rate matching device 12 Physical Channel Mapper 13 Channel Decoding Circuit 14 Physical Channel Demapper 15 Rate Dematcher 16 Channel Decoder 17 ID Specific CRC Detector 18 Corrected AG Calculation Mechanism 21 Scheduler 22 RG / E-RGCH Conversion Mechanism 23 Signature Sequence Conversion 24 Repetition / code hopping device 25 Physical channel mapper 26 E-RGCH / RG conversion mechanism 27 Physical channel demapper 28 Synthesis / code dehopping device 29 RG extractor 30 Corrected AG operation mechanism 41 Transmission data Buffer 42 transmission power monitoring unit 43,43a transmission control unit 44 transmission unit 45 reception unit 46 ACK / NACK measuring unit 51 receiving unit 52 scheduler 53 transmitting unit

Claims (35)

A wireless communication method in a wireless communication system in which a base station and a terminal device perform wireless communication,
The base station, as a parameter when the terminal device transmits data to its own station, an absolute assignment value calculation step for calculating an absolute assignment value allowed for the terminal device; and
The terminal apparatus corrects the absolute allocation value calculated by the base station with reference to the maximum processing capacity of the own apparatus, and sets a corrected allocation value that is a parameter when the own apparatus transmits data to the base station. A post-correction assigned value calculation step to be calculated;
A wireless communication method comprising: further,
The base station, the absolute allocation value notifying step of notifying the terminal device of the absolute allocation value calculated in the absolute allocation value calculating step;
A data transmission step in which the terminal device transmits transmission data to the base station according to the corrected allocation value calculated in the corrected allocation value calculation step;
The wireless communication method according to claim 1, further comprising: The base station further calculates a relative allocation value for calculating a relative allocation value for instructing a change in the absolute allocation value calculated in the absolute allocation value calculation step,
Including
The terminal device calculates a corrected allocation value based on the absolute allocation value and the relative allocation value calculated by the base station and the maximum processing capacity in the corrected allocation value calculation step. The wireless communication method according to claim 1 or 2. A wireless communication method adopted by a terminal device in a wireless communication system in which a base station and a terminal device perform wireless communication,
The corrected allocation for correcting the absolute allocation value calculated by the base station with reference to the maximum processing capacity of the own device and calculating the corrected allocation value that is a parameter when the own device transmits data to the base station Value calculation step,
A wireless communication method comprising: A wireless communication method adopted by a terminal device in a wireless communication system in which a base station and a terminal device perform wireless communication,
The absolute allocation value calculated by the base station is corrected based on the relative allocation value calculated by the base station for instructing the change of the absolute allocation value, and the maximum processing capability of the own device, A corrected assigned value calculation step for calculating a corrected assigned value which is a parameter for transmitting data to the base station;
A wireless communication method comprising: A wireless communication method employed by a base station in a wireless communication system in which a base station and a terminal device perform wireless communication,
An absolute assignment value calculation step for calculating an absolute assignment value allowed for the terminal device as a parameter when the terminal device transmits data to the own station;
A relative assigned value calculating step for calculating a relative assigned value for instructing a change in the absolute assigned value calculated in the absolute assigned value calculating step;
A wireless communication method comprising: further,
An absolute allocation value notification step of notifying the terminal device of the absolute allocation value calculated in the absolute allocation value calculation step;
A relative assignment value notification step of notifying the terminal device of the relative assignment value calculated in the relative assignment value calculation step;
The wireless communication method according to claim 6, further comprising:   The wireless communication method according to claim 1, wherein the absolute assignment value includes a transmission rate.   8. The radio communication method according to claim 3, wherein the relative allocation value includes a transmission rate. A wireless communication method in a wireless communication system in which a base station and a terminal device perform wireless communication,
The base station, as a parameter when the terminal device transmits data to its own station, an absolute assignment value calculation step for calculating an absolute assignment value allowed for the terminal device; and
The terminal device corrects the absolute allocation value calculated by the base station with reference to the uplink occupancy time of the own device and the amount of data stored in the buffer of the own device. A post-correction assigned value calculation step for calculating a post-correction assigned value that is a parameter for transmitting data;
A wireless communication method comprising: A wireless communication method in a wireless communication system in which a base station and a terminal device perform wireless communication,
When the terminal device performs data transmission to the base station, the base station first assigns channel resources, and further notifies the terminal device of the end of assignment,
Even if the terminal apparatus does not receive the allocation end signal from the base station, the terminal apparatus autonomously ends the allocation when a response signal (ACK / NACK) to its transmission does not arrive from the base station for a while. And further, notifying the base station of the determination. A wireless communication method in a wireless communication system in which a base station and a terminal device perform wireless communication,
When the terminal device performs data transmission to the base station, the base station first assigns channel resources, and further notifies the terminal device of the end of assignment,
If the base station transmits the end of allocation to the terminal apparatus and the terminal apparatus continues to transmit data thereafter, the base station notifies the end of allocation again. A wireless communication method characterized by continuously transmitting termination. A wireless communication method in a wireless communication system in which a base station and a terminal device perform wireless communication,
When the terminal device performs data transmission to the base station, the base station first assigns channel resources, and further notifies the terminal device of the end of assignment,
The terminal device returns a response signal to the end of allocation from the base station,
The base station notifies the end of allocation again when a response signal is not returned within a predetermined time despite the transmission of the end of allocation, and in that case, the end of allocation is continuously transmitted. Wireless communication method. A wireless communication method in a wireless communication system in which a base station and a terminal device perform wireless communication,
When the terminal device performs data transmission to the base station, the base station first allocates channel resources, notifies the terminal device of the end of the allocation, and further increases resource allocation. When finely adjusting the transmission data rate or transmission power allowed for the terminal device using the / DOWN command,
The base station transmits an end of allocation and transmits a DOWN command a plurality of times. A wireless communication system in which a base station and a terminal device perform wireless communication,
The base station calculates an absolute allocation value allowed for the terminal device as a parameter when the terminal device transmits data to itself,
The terminal apparatus corrects the absolute allocation value calculated by the base station with reference to the maximum processing capacity of the own apparatus, and sets a corrected allocation value that is a parameter when the own apparatus transmits data to the base station. A wireless communication system characterized by computing. further,
The base station notifies the calculated absolute allocation value to the terminal device,
The radio communication system according to claim 15, wherein the terminal apparatus transmits transmission data to the base station according to the corrected allocation value. The base station further calculates a relative assignment value for instructing the change of the absolute assignment value,
The radio communication system according to claim 15 or 16, wherein the terminal device calculates a corrected allocation value based on the absolute allocation value, the relative allocation value, and the maximum processing capacity.   The wireless communication system according to claim 15, 16 or 17, wherein the absolute allocation value includes a transmission rate.   The wireless communication system according to claim 15, wherein the relative allocation value includes a transmission rate. A wireless communication system in which a base station and a terminal device perform wireless communication,
When the terminal device performs data transmission to the base station, the base station first assigns channel resources, and further notifies the terminal device of the end of assignment,
Even if the terminal apparatus does not receive the allocation end signal from the base station, the terminal apparatus autonomously ends the allocation when a response signal (ACK / NACK) to its transmission does not arrive from the base station for a while. And further, notifying the base station of the determination. A wireless communication system in which a base station and a terminal device perform wireless communication,
When the terminal device performs data transmission to the base station, the base station first assigns channel resources, and further notifies the terminal device of the end of assignment,
If the base station transmits the end of allocation to the terminal apparatus and the terminal apparatus continues to transmit data thereafter, the base station notifies the end of allocation again. A wireless communication system characterized by continuously transmitting termination. A wireless communication system in which a base station and a terminal device perform wireless communication,
When the terminal device performs data transmission to the base station, the base station first assigns channel resources, and further notifies the terminal device of the end of assignment,
The terminal device returns a response signal to the end of allocation from the base station,
The base station notifies the end of allocation again when a response signal is not returned within a predetermined time despite the transmission of the end of allocation, and in that case, the end of allocation is continuously transmitted. Wireless communication system. A wireless communication system in which a base station and a terminal device perform wireless communication,
When the terminal device performs data transmission to the base station, the base station first allocates channel resources, notifies the terminal device of the end of the allocation, and further increases resource allocation. When finely adjusting the transmission data rate or transmission power allowed for the terminal device using the / DOWN command,
The base station transmits an end of allocation and transmits a DOWN command a plurality of times. A terminal device in a wireless communication system in which a base station and a terminal device perform wireless communication,
The absolute allocation value calculated by the base station is corrected with reference to the maximum processing capability of the own device, and the corrected allocation value that is a parameter when the own device transmits data to the base station is calculated. A terminal device. A terminal device in a wireless communication system in which a base station and a terminal device perform wireless communication,
The absolute allocation value calculated by the base station is corrected based on the relative allocation value calculated by the base station for instructing the change of the absolute allocation value, and the maximum processing capability of the own device, A terminal apparatus that calculates a corrected allocation value that is a parameter for transmitting data to a base station.   The terminal device according to claim 24 or 25, wherein the absolute allocation value includes a transmission rate.   27. The terminal device according to claim 24, 25 or 26, wherein the relative allocation value includes a transmission rate. There is a terminal device in a wireless communication system in which a base station and a terminal device perform wireless communication,
When the base station performs data transmission to the base station, the base station first assigns channel resources, and further notifies the end of the assignment to the base station,
Even if the allocation end signal from the base station is not received, if the response signal (ACK / NACK) to the transmission of the own apparatus does not arrive from the base station for a while, the allocation end is determined autonomously, and The terminal device that notifies the base station of the determination. A terminal device in a wireless communication system in which a base station and a terminal device perform wireless communication,
When the base station performs data transmission to the base station, the base station first assigns channel resources, and further notifies the end of the assignment to the base station,
A terminal apparatus that returns a response signal in response to the end of allocation from the base station. A base station in a wireless communication system in which a base station and a terminal device perform wireless communication,
As a parameter when the terminal device transmits data to its own station, the absolute allocation value allowed for the terminal device is calculated,
The base station further calculates a relative assignment value for instructing a change of the absolute assignment value. further,
The base station according to claim 30, wherein the absolute allocation value and the relative allocation value are notified to the terminal device.   The base station according to claim 30 or 31, wherein the absolute allocation value includes a transmission rate.   The base station according to claim 30, 31 or 32, wherein the relative allocation value includes a transmission rate. A base station in a wireless communication system in which a base station and a terminal device perform wireless communication,
When the terminal device performs data transmission to the own station, the own station first assigns channel resources, and further notifies the terminal device of the end of assignment,
If the terminal device seems to continue data transmission after transmitting the end of allocation to the terminal device, it notifies the end of allocation again, and in that case, it continuously sends the end of allocation. A base station characterized by that. A base station in a wireless communication system in which a base station and a terminal device perform wireless communication,
When the terminal device performs data transmission to the own station, the own station first allocates channel resources, notifies the terminal device of the end of allocation, and further UP / DOWN for resource allocation. When finely adjusting the transmission data rate or transmission power allowed to the terminal device using a command,
A base station that transmits an end of allocation and transmits a DOWN command a plurality of times.

Images