JP2003244071A - Wireless communication apparatus and transmission power control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless communication apparatus capable of applying transmission power control to both a DPCH (Dedicated Physical Channel) and a DSCH (Downlink Shared Channel). <P>SOLUTION: The wireless communication apparatus of this invention adopts a configuration of a mobile station side where the dedicated physical channel is used to control the transmission power of the downlink shared channel, and is characterized in that the apparatus includes: a control section 8 that sets initial transmission power when the DSCH is open and sets again the initial transmission power before the reception frame when a DSCH non-reception period is n-frames or more after that; a TPC (Transmission Power Control) bit generating section 9 for generating TPC-bits to instruct the base station to increase/decrease/hold the transmission power during reception by the DSCH; and a transmission control section 11 for informing the base station about the initial transmission power and the TPC bits by using the DPCH. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication device used in mobile wireless communication, and particularly to a DSCH (Downlink Shared Channel) using an upstream DPCH (Dedicated Physical Channel).
l: downlink time division physical channel) and a transmission power control method.

[0002]

2. Description of the Related Art A conventional wireless communication device will be described below. As a conventional wireless communication device for controlling transmission power, there is, for example, a device described in Japanese Patent Laid-Open No. 2000-115072. In the wireless communication device described in the above publication, a mobile station that receives a spread signal transmitted from a base station and obtains symbol data by despreading the spread signal uses a pilot symbol included in the symbol data. The synchronization establishment process is performed using the control signal, and control is performed according to the instruction of the base station based on the pilot symbol pattern.

The above-mentioned conventional wireless communication device uses the TP
By abolishing the symbol for C (Transmission Power Control) and replacing the TPC symbol with the pilot symbol, the frame efficiency is improved and the degree of freedom of the TPC symbol information is increased.

[0004]

However, the above
In the conventional wireless communication device, the degree of freedom of the TPC symbol is improved, but only the transmission power control of the DPCH alone is considered, and the transmission power control for both the DSCH and DPCH is not considered. There was a problem.

Further, in the conventional wireless communication device, no reference is made to the algorithm for updating the initial transmission power, and even if the TPC accuracy is improved, the DSCH
As described above, there is a problem that the effect cannot be expected for a channel that is transmitted in bursts.

The present invention has been made in view of the above, and an object of the present invention is to obtain a radio communication apparatus and a transmission power control method capable of performing transmission power control for both DPCH and DSCH.

[0007]

[Means for Solving the Problems]
In order to achieve the object, in the wireless communication device according to the present invention, “uplink dedicated physical channel for a plurality of mobile stations to individually transmit data and control information to a base station”
As a configuration on the mobile station side that controls transmission power of “downlink time-division physical channel for time-multiplexing one physical channel for each user and transmitting data from a base station to a plurality of mobile stations” A control means for setting the initial transmission power when the link of the downlink time division physical channel is generated, and then resetting the initial transmission power before the reception frame when the downlink time division physical channel non-reception period is n frames or more. A TPC bit generation means for generating a TPC (transmission power control) bit for instructing the base station to raise or lower or maintain the transmission power during reception by the downlink time division physical channel; The TPC bit is one of the uplink dedicated physical channels, "the uplink dedicated control physical channel for a plurality of mobile stations to individually transmit control information to the base station. Maps to channel ", characterized in that it comprises a transmission control means for notifying the base station of the transmission data after mapping.

In the radio communication device according to the next invention, when the downlink time-division physical channel link is generated, a "base station includes a plurality of mobile stations" transmitted from a base station performing downlink time-division physical channel communication. For the downlink common pilot channel for transmitting the pilot "or" detection means for detecting the pilot of the "downlink dedicated control physical channel for the base station to individually transmit control information to a plurality of mobile stations", Channel quality information of a downlink time division physical channel based on a downlink common pilot channel with a base station or a downlink dedicated control physical channel, or the channel quality information and target quality based on the pilot detection result and the AGC control gain. Reception quality calculation means for calculating a difference from the value (line quality difference information), And notifies to the base station the quality difference information as the transmission data.

In the radio communication apparatus according to the next invention, the reception quality calculation means determines the downlink dedicated control physical channel after N slot averaging or M frame averaging based on the pilot detection result and the AGC control gain. Calculate predetermined channel quality information, and then, based on the channel quality information of the downlink dedicated control physical channel, perform transmission on the downlink time division physical channel with the same transmission power as when the base station transmitted on the downlink dedicated control physical channel. In this case, the channel quality information of the downlink time division physical channel is calculated.

In the radio communication apparatus according to the next invention, the reception quality calculation means is arranged such that "the base station is a time-division pilot for a plurality of mobile stations, which is transmitted from the base station communicating on the downlink time division physical channel. And a downlink time division control physical channel for transmitting control information, and based on the detection result of the pilot and the AGC control gain, downlink time division control physics after N slot averaging or N frame averaging It is characterized in that predetermined channel quality information of the channel is calculated.

In the radio communication apparatus according to the next invention, the TPC bit generation means determines a transmission power control amount for a downlink time division physical channel in advance, and a slot in the uplink dedicated physical channel frame is a downlink time division physical channel. In the first TPC bit notification slot for instructing up / down of the transmission power for the channel, and when there is no downlink time division physical channel addressed to the own station, the previous TPC bit value is held and the uplink individual The slot in the physical channel frame is the first TPC bit notification slot,
And when there is a downlink time division physical channel addressed to the own station, a new TPC bit for the downlink time division physical channel is generated based on the line quality and the reference quality, and the slot in the uplink dedicated physical channel frame is Up / do of transmission power for "downlink dedicated physical channel for base station to individually transmit data and control information to a plurality of mobile stations"
In the case of the second TPC bit notification slot for indicating wn, the TPC bit for the downlink dedicated physical channel is generated.

In the radio communication device according to the next invention, the TPC bit generation means generates TPC bits for the downlink dedicated physical channel and the downlink time division physical channel in all slots in the uplink dedicated physical channel frame, In the TPC bit generation processing for the downlink time division physical channel, when there is no downlink time division physical channel addressed to the own station, the previous TPC bit value is held and the downlink time division physical channel addressed to the own station is If present, a new TP is created based on the line quality and the reference quality.
It is characterized by generating C bits.

In the radio communication device according to the next invention, when the reception burst period of the downlink time division physical channel extends for a certain period, the downlink dedicated control physical channel, the downlink common pilot channel or the downlink time division control physical channel is used. It is characterized in that the channel quality information or the channel quality difference information is notified to the base station before the start of the next downlink time division physical channel reception.

In the radio communication device according to the next invention, the channel quality information or the channel quality difference information of the downlink dedicated control physical channel, the downlink common pilot channel or the downlink time division control physical channel is periodically transmitted next time. It is characterized in that the base station is notified before the reception of the downlink time division physical channel.

In the transmission power control method according to the next invention, "one mobile station uses a single uplink physical channel for individually transmitting data and control information to the base station" The mobile station side, which controls the transmission power of the "downlink time-division physical channel for transmitting data from the base station to multiple mobile stations by time-multiplexing the physical channels for each user", creates a downlink time-division physical channel link. When the initial transmission power information is sometimes set, and the first transmission step of notifying the base station of the initial transmission power information by controlling the uplink dedicated physical channel, and the downlink time division physical channel non-reception period is n frames or more, A reset step of resetting the initial transmission power information before the received frame, and increase or decrease of the transmission power to the base station during reception by the downlink time division physical channel or A TPC bit generation step of generating a TPC bit for instructing the holding, and the initial transmission power information after the resetting and the TPC bit being one of the uplink dedicated physical channels, "a plurality of mobile stations tell the base station And a second transmission step of notifying the base station of the mapped transmission data and transmitting the mapped transmission data to the base station.

In the transmission power control method according to the next invention, further, when the link of the downlink time division physical channel is generated, "a plurality of base stations are moved by a base station performing downlink time division physical channel communication" is transmitted. A common downlink pilot channel for transmitting a pilot to a station "or a demodulation step for detecting a pilot of a" downlink dedicated control physical channel for a base station to individually transmit control information to a plurality of mobile stations " , Channel quality information of a downlink time division physical channel based on a downlink common pilot channel or a downlink dedicated control physical channel with a base station, or the channel quality information and a reference based on the pilot detection result and the AGC control gain. A reception quality calculation step of calculating a difference from the quality value (channel quality difference information), And notifying the base station channel quality difference information as the transmission data.

In the transmission power control method according to the next invention, in the reception quality calculation step, the downlink dedicated control physical channel after N slot averaging or M frame averaging is based on the pilot detection result and the AGC control gain. Of the downlink dedicated control physical channel, and then, based on the downlink dedicated control physical channel channel quality information, transmit on the downlink time-division physical channel with the same transmission power as when the base station transmitted on the downlink dedicated control physical channel. It is characterized by calculating the channel quality information of the downlink time division physical channel when it is performed.

In the transmission power control method according to the next invention, in the reception quality calculation step, "a base station is time-division-multiplexed with a plurality of mobile stations transmitted from a base station performing downlink time division physical channel communication". And a downlink time division control physical channel for transmitting control information, and based on the detection result of the pilot and the AGC control gain, downlink time division control physics after N slot averaging or N frame averaging It is characterized in that predetermined channel quality information of the channel is calculated.

In the transmission power control method according to the next invention, in the TPC bit generating step, the transmission power control amount for the downlink time division physical channel is determined in advance, and the slot in the uplink dedicated physical channel frame is downlink time division. In the first TPC bit notification slot for instructing up / down of the transmission power for the physical channel, and when there is no downlink time division physical channel addressed to the own station, the previous TPC bit value is held, and When the slot in the dedicated physical channel frame is the first TPC bit notification slot and there is a downlink time division physical channel addressed to the own station, a new downlink time division physical channel is generated based on the line quality and the reference quality. Generate TPC bits for the channel,
The slot in the uplink dedicated physical channel frame is the transmission power up for "the downlink dedicated physical channel for the base station to individually transmit data and control information to a plurality of mobile stations".
In the case of the second TPC bit notification slot for indicating / down, TPC bits for the downlink dedicated physical channel are generated.

In the transmission power control method according to the next invention, in the TPC bit generation step, TPCs for downlink dedicated physical channels and downlink time-division physical channels are used for all slots in the uplink dedicated physical channel frame.
TP for generating the bit and for the downlink time division physical channel
In the C-bit generation processing, when there is no downlink time division physical channel addressed to the own station, the previous TPC bit value is held, and when there is a downlink time division physical channel addressed to the own station, the line quality is And a new TPC bit is generated based on the reference quality.

In the transmission power control method according to the next invention, when the reception burst period of the downlink time division physical channel extends for a certain period, the downlink dedicated control physical channel,
Link quality information or link quality difference information of the downlink common pilot channel or downlink time division control physical channel,
It is characterized in that the notification is made to the base station before the reception of the next downlink time division physical channel is started.

In the transmission power control method according to the next invention, the channel quality information or the channel quality difference information of the downlink dedicated control physical channel, the downlink common pilot channel or the downlink time division control physical channel is periodically transmitted next time. Is notified to the base station before the start of the downlink time division physical channel reception.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a wireless communication device and a transmission power control method according to the present invention will be described below in detail with reference to the drawings. The present invention is not limited to this embodiment. In the following embodiments, a wireless communication device for W-CDMA will be described as an example.

FIG. 1 is a diagram showing the configuration of a wireless communication apparatus (mobile station) according to the present invention. In FIG. 1, reference numeral 1 is a receiving antenna for receiving radio signals transmitted from a plurality of base stations, and 2 is band limiting for an analog radio signal received by the receiving antenna 1, and a signal having an appropriate power is provided. A receiving analog section for amplification, 3 is an A / D for quantizing the received analog signal and converting it into a digital signal.
A conversion unit (A / D), 4 is a RAKE searcher that identifies a base station timing and a scrambling code from a received digital signal, and 5 is a radio signal transmitted from a plurality of base stations and a multi-wave of each base station. Reference numeral 6 is a demodulation unit for demodulating / combining pass waves, 6 is a decoding unit for decoding the demodulated radio signal, and 7 is a reception quality calculation based on the reception information notified from the reception analog unit 2 and the demodulation unit 5. Further, 8 is a reception quality calculation unit that outputs the reception quality or a quality difference between the reception quality and the reference quality, and 8 is the reception quality calculation unit 7 that extracts the reference quality information from the demodulated data.
Is a control unit for notifying the reference quality to, and outputting the quality difference between the reception quality and the reference quality, the reception quality, and the base station transmission power control amount, and 9 is based on the received channel quality information for each channel. A TPC bit generation unit that generates TPC (transmission power control) bits, 10 is an encoding unit that codes data or voice data notified from the control unit 8, and 11 is control information such as TPC bits or transmission data. Reference numeral 12 denotes a transmission control unit that maps and modulates in a frame, and 12 denotes a D / A conversion unit (D / A / D conversion unit that converts digital data notified from the transmission control unit 11 into analog data.
A), 13 is a transmission analog unit that amplifies the power of transmission data so as to have an appropriate transmission power, and 14 is a transmission antenna that transmits the amplified transmission data as a radio signal. Note that the processing of the TPCbit generation unit 9 may be performed by the data control unit 8.

Here, the transmission power control method of the first embodiment in the radio communication apparatus (mobile station) configured as described above will be explained. FIG. 2 is a diagram showing a transmission power control method according to the first embodiment.

In the mobile station, the DSCH (downlink time division physical channel for time-multiplexing one physical channel for each user and transmitting data from the base station to each mobile station) is operated.
Then, the controller 8 sets the initial transmission power (step S1 in FIG. 2). In the packet transmission method using DSCH, radio resources can be used by a plurality of terminals, and transmission power control can also be applied, so efficient transmission is possible.

Then, the encoding unit 10 encodes the initial transmission power as transmission data, the transmission control unit 11 maps / modulates the transmission data, and the modulated transmission data is DPCH (for transmitting data and control information). After notifying the base station using the dedicated physical channel), the control unit 8 of the mobile station receives the received frame when the burst (DSCH non-reception period) up to the received frame by the DSCH is n frames or more (step S2, Yes). Reset the initial transmission power before that. In addition, when the DSCH reception frame is notified from the base station in advance when the DSCH is open (when the DSCH link is generated), the first DSC
The initial transmission power is set several slots or several frames before the H reception frame.

In addition, the mobile station uses the DSCH during reception (step S2, No), and the TPC bit generator 9
Generates a TPC bit for instructing the base station to raise or lower the transmission power or hold it (step S
3). Then, the transmission control unit 11 sets the generated TPC bit in the TCP bit setting area of the DPCCH (dedicated control physical channel for transmitting control information) which is one of the DPCHs (step S4).

Thereafter, the mobile station repeatedly executes the above operation (steps S1 to S5) while performing communication using the DSCH (step S5, No).

As described above, in the present embodiment, D
In addition to transmission power control for PCH, DSC
Transmission power control for H becomes possible.

Next, the operation when the mobile station determines the initial transmission power before performing the DSCH communication will be described.
FIG. 3 is a diagram showing an operation when the mobile station determines the initial transmission power before performing the DSCH communication.

In the mobile station, CPICH (Common Pilot Channel) transmitted from the base station performing DSCH communication by the open of DSCH (FIG. 3, step S11) is used because the base station transmits pilots to a plurality of mobile stations. Downlink common pilot channel) or DPCCH pilot is detected by a predetermined procedure. The reception quality calculation unit 7 of the mobile station then detects the detection result of the pilot and the AGC.
From the control gain of (Auto Gain Control), the line quality information (Eb / No, after averaging N slots or averaging N frames)
Ec / No, Es / No: Energy to noise power density ratio, SIR: Desired wave received power to interference signal power ratio, RSSI: Received signal strength display, RSCP: Desired wave received power) are calculated (step S1).
2).

Thereafter, the reception quality calculation unit 7 of the mobile station
From the above channel quality information, the channel quality information of DSCH when the base station performs transmission by DSCH with the same transmission power as when transmitting by DPCCH is calculated (step S13). For example, the Es / Io of DSCH (Io is the interference wave power) is DsCH based on Es / Io of DPCCH.
It can be obtained from the transmission rate of PCCH and the transmission rate of DSCH. Note that the line quality information obtained above and the target quality value may be compared and the difference may be obtained.

The mobile station notifies the base station of the channel quality information or the channel quality difference information of the DSCH based on the DPCCH with the base station in a predetermined procedure (step S).
14). Thereby, the initial transmission power of DSCH can be determined. However, DSC based on DPCCH
When obtaining the line quality difference information of H, the reception frame number of the DPCCH is notified together with the line quality information or the line quality difference information.

As described above, in this embodiment, the mobile station is configured to notify the base station in advance of the DSCH line quality information or the line quality difference information before the DSCH communication. Therefore, it is appropriate from the start of the DSCH communication. Data can be received with excellent line quality. As a result, it is possible to reduce traffic such as a retransmission request due to insufficient transmission power,
Accordingly, the data reception delay amount can be significantly reduced. Also, it becomes possible to reduce the interference power to other cells due to excessive transmission power, so that it is possible to reduce the amount of retransmission requests in other cells, and to reduce the amount of data reception delay.

FIG. 4 is a diagram showing a detailed configuration of the reception quality calculation unit 7. In FIG. 4, reference numeral 21 denotes a channel quality calculation unit, which has an AGC gain notified from the reception analog unit 2, pilot reception information of each channel notified from the demodulation unit 5, and control information notified from the control unit 8. The line quality of each channel is calculated based on A quality difference calculation unit 22 compares the line quality of each channel output from the line quality calculation unit 21 with the reference quality of each channel output from the control unit 8 to determine the quality difference between the line quality and the reference quality. Ask for. This quality difference is notified to the TPC bit generation unit 9 and the control unit 8.

FIG. 5 is a diagram showing a first operation example of the reception quality calculation section 7. In the mobile station, once the DSCH communication is started, the downlink DPCCH pilot transmitted from the base station performing the DSCH communication is detected, and the line quality calculation unit 21 determines N from the pilot detection result and the AGC control gain. Channel quality information (Eb / No, Ec / No, Es / No, SIR, RSSI, RSCP) after slot averaging or N frame averaging is calculated (FIG. 5, step S31).

Then, in the channel quality calculation unit 21 of the mobile station, the base station determines DPCC from the channel quality information of the DPCCH.
The channel quality information of DSCH when transmitting by DSCH with the same transmission power as when transmitting by H is calculated (step S32). For example, DSCH Es / I
o is the DPCCH based on the Es / Io of the DPCCH.
It can be obtained from the transmission rate of DSCH and the transmission rate of DSCH.

Then, in the quality difference calculation unit 22 of the mobile station,
The obtained line quality information is compared with the target quality value, and the quality difference is calculated (step S33).

FIG. 6 is a diagram showing a second operation example of the reception quality calculation section 7. At the mobile station, once DSCH
When the communication is started, a PSCCH (Physical Shared Channel Cont) transmitted from the base station performing the DSCH communication is transmitted.
rol Channel: A base station detects a pilot of a downlink time division control physical channel (time-division control physical channel for transmitting pilot and control information to a plurality of mobile stations in a time multiplexed manner), and the line quality calculation unit 21 detects the pilot detection result. From the control gain of AGC, PSC after N slot averaging or N frame averaging
CCH line quality information (Eb / No, Ec / No, Es / No, SIR, RSSI, RS
CP) is calculated (FIG. 6, step S41).

Then, in the quality difference calculation unit 22 of the mobile station,
The obtained line quality information is compared with the target quality value, and the quality difference is calculated (step S42).

As described above, in the present embodiment, the mobile station is configured to notify the base station of the required transmission power determination element (calculation result of the reception quality calculation unit 7) during DSCH communication. Data can be received with appropriate line quality even during communication. By this means, it is possible to reduce traffic such as a retransmission request due to insufficient transmission power, and it is possible to greatly reduce the data reception delay amount. Also, it becomes possible to reduce the interference power to other cells due to excessive transmission power, so that it is possible to reduce the amount of retransmission requests in other cells, and to reduce the amount of data reception delay.

The reception quality calculation unit 7 is not limited to the configuration shown in FIG. 4 and may be configured as shown in FIG. 7, for example, and the operation shown in FIG. 5 or 6 is performed in this case as well. . 7 is different from FIG. 4 in reception quality calculation unit 7
It is a figure which shows the detailed structure of. In FIG. 7, reference numeral 21a denotes a channel quality calculation unit, which has an AGC gain notified from the reception analog unit 2, pilot reception information of each channel notified from the demodulation unit 5, and control information notified from the control unit 8. The line quality of each channel is calculated based on This line quality is notified to the quality difference calculation unit 22a and the control unit 8.
Further, 22a is a quality difference calculation unit, and the line quality calculation unit 2
The line quality of each channel of the 1a output is compared with the reference quality of each channel of the control unit 8 to calculate the quality difference between the line quality and the reference quality. This quality difference is notified to the TPC bit generation unit 9.

FIG. 8 is a diagram showing a first detailed configuration of the TPC bit generator 9. In FIG. 8, 31 is up / d
The down determination unit determines whether the DPCH quality difference is positive or negative, and controls so that the base station transmission power is reduced if the reception quality level is higher than the reference quality level, and the reception quality level is higher than the reference quality level. If it is low, control is performed to increase the transmission power of the base station. Reference numeral 32 is a bit generation unit, which performs a TPC bit generation process for the DPCH. TP
The C bit is generated by 1 bit or 2 bits based on the information output from the up / down determination unit 31 and the control information (details are defined in 3GPP).

Reference numeral 33 is an up / down determination unit, which determines whether the quality difference for DSCH is positive or negative, and up / down is determined.
Control is performed in the same manner as the wn determination unit 31. The up / down determination unit 33 performs the following control when the TPC bit for DSCH is used as 2 bits. For example, when the base station transmission power control amount is received from the control unit 8 and the absolute value of the quality difference is smaller than the base station transmission power control amount, the transmission power is not changed as shown in (1) below. On the other hand, when the absolute value of the quality difference is larger than the base station transmission power control amount and the reception quality level is higher than the reference quality level, the base station transmission power is controlled to be lowered as shown in (2) below. If the absolute value of the quality difference is larger than the base station transmission power control amount and the reception quality level is lower than the reference quality level, the base station transmission power is controlled to increase as shown in (3) below. The above control is not limited to the base station transmission power control amount, and a threshold value given from the control unit 8 may be used.

(1) No change in transmission power: | Reception quality-quality difference | ≦ base station transmission power control amount (2) Transmission power up: {| reception quality-quality difference |> base station transmission power control amount} && { (Reception quality-quality difference) <0} (3) Transmission power down: {| reception quality-quality difference |> base station transmission power control amount} && {(reception quality-quality difference)>
0}

Or (1) no change in transmission power: | reception quality-quality difference | <base station transmission power control amount (2) transmission power up: {| reception quality-quality difference | ≧ base station transmission power control amount} && {(reception quality-quality difference) <0} (3) transmission power down: {| reception quality-quality difference | ≧ base station transmission power control amount} && {(reception quality-quality difference)>
0}

Reference numeral 34 is a bit generation unit for performing a TPC bit generation process for the DSCH, and an up / down determination unit 3
A TPC bit of 1 bit or 2 bits is generated from 3 outputs and control data. For example, when the TPC bit is binary-determined, the transmission power up or the transmission power d as in the DPCH
It has a binary configuration of "own". Further, the structure of the TPC bit is expressed as shown in FIGS. 9 and 10. Although up is set to 1 in this example, the logics of up and down may be exchanged. Further, although no change is set to 1, the logic may be interchanged with no change and with change.

Reference numeral 35 denotes a selector which selects a TPC bit for DPCH or a TPC bit for DSCH from the transmission slot number and control data of the mobile station, and transmits the TPC bit corresponding to each slot number to the transmission control unit 11 Notify to.

FIG. 11 is a diagram showing a first operation example (in the case of binary) of the TPC bit generator 9. Mobile station T
The PC bit generator 9 generates a TPC bit based on the received channel quality information and reference quality. In addition,
In the transmission power control method using the TPC bit of the uplink DPCCH, the transmission power control amount for DSCH is determined in advance, and the slot (TPC bit notification slot) for notifying the transmission power up / down for DSCH and the DPCCH
For notifying the transmission power up / down for the transmission (TP
C-bit notification slot).

TP on DPCCH in W-CDMA
C bit exists for each slot, and T on the uplink DPCCH
PC bits are transmitted through the TPC bits for DPCH and DSCH.
Distribute to each knowledge slot. TPC for DSCH
The bit notification slot is the slot of the DPCH frame
Number (15 slots) and least common multiple of 1 cycle
(T_{fram e}), SLOT_DSCHAssigned every
Then, the TPC bit generation unit 9 of the mobile station
In the case of TPC bit notification slot (FIG. 11, step
S51, Yes), TPC bit generation process for DSCH
Do the work.

The mobile station receives the transmission data transmitted in bursts using the DSCH and, for example, when there is no DSCH addressed to itself (steps S52, N).
o), the TPC bit generator 9 transmits the TPC transmitted last time.
The bit value is held and transmitted (step S53).
On the other hand, when the DSCH addressed to the own station exists (step S
52, Yes), the reception quality is compared with the reference quality (step S54), and if the reception quality does not satisfy the reference quality (step S54, No), a TPC bit is generated so as to increase the transmission power (step S56). ), If the reception quality satisfies the reference quality (step S54, Yes)
s), TPC bits are generated so as to reduce the transmission power (step S55). However, in the processing of step S51, when it is not the TPC slot for DSCH (step S51, No), the TPC bit generation unit 9 sets DP
The transmission power of CH is controlled (step S57).

FIG. 12 is a diagram showing a second operation example (in the case of ternary value) of the TPC bit generator 9. In the TPC bit, "increase the transmission power", "decrease the transmission power",
If you want to have three meanings of "no power change",
As shown in (1) to (3) above, when the absolute value of the difference between the reception quality and the reference quality is greater than or equal to a predetermined threshold value (FIG. 12, step S61, Yes), the same as above. Binary determination is performed (step S54), and when the absolute value of the difference between the reception quality and the reference quality is less than the threshold value (step S54).
61, No), the TPC bit is generated so as not to change the transmission power (step S62).

In the above description, an example is shown in which the TPC bit notification slot for DSCH changes depending on the frame position of DSCH.
The TPC bit notification slot for use may be fixed. In this case, the TPC bit for DSCH is DSC
It is generated based on the reception result of the DSCH closest to the TPC bit notification slot for H. When there is no DSCH addressed to the own station, the TPC bit value transmitted last time is held and transmission is continued.

The base station transmission power control amount for one time may be preset. In this case, the base station transmission power control amount may be a system-only value, or may be updated in n stages according to the moving speed of the mobile station. FIG. 13 is a diagram showing a method of generating a TPC bit.
FIG. 4 is a diagram showing a specific example of TPC bit generation.

As described above, in the present embodiment, T
Due to the processing of the PC bit generation unit 9, the mobile station
The transmission power control for use is performed in units of DSCH frames. As a result, it is possible to dynamically follow reception level fluctuations such as fading. Further, since the base station transmission power dynamically follows the fading, it is possible to reduce the traffic such as a retransmission request due to the shortage of the base station transmission power, and to significantly reduce the data reception delay amount. Also,
Since it is possible to reduce the interference power to other cells due to excessive base station transmission power, it is possible to reduce the amount of retransmission requests in other cells, and to significantly reduce the amount of data reception delay.

FIG. 15 is a diagram showing a second detailed configuration of the TPC bit generator 9. In FIG. 15, 36 is up
/ Down determination unit, which determines whether the DPCH quality difference is positive or negative, and controls so that the base station transmission power is reduced if the reception quality level is higher than the reference quality level, and the reception quality level is the reference quality level. If it is lower, control is performed to increase the base station transmission power. Reference numeral 37 denotes a bit generation unit that performs a TPC bit generation process for the DPCH. TP
The C bit is generated by 1 bit according to the information output from the up / down determination unit 36.

Reference numeral 38 is an up / down determination unit, which determines whether the quality difference for DSCH is positive or negative, and up / down is determined.
Control is performed in the same manner as the wn determination unit 36. A DSCH bit generation unit 39 generates a TPC bit from the output of the up / down determination unit 38. For example, DSC addressed to your own station
When H exists, 1 or 0 is TPC depending on the judgment result.
Bits are allocated to the local station, but if there is no DSCH addressed to the local station, the last generated TPC bit directed to the local station is allocated. Or, if there is no DSCH addressed to the own station, T
Set the PC bit to 1 or 0.

FIG. 16 is a diagram showing an operation example of the TPC bit generator 9. Here, the upstream TPC bit is 2
When the bit configuration is used, TPC bits for DPCH and DSCH are transmitted for each slot.

In the transmission power control method using the TPC bit of the uplink DPCCH, the uplink DPCC is used during DSCH communication.
The TPC bit of H has a 2-bit configuration, the power control bit for the downlink DPCH has 1 bit, and the DSCH has a
The power control bit for is set to 1 bit, and only up / down of the transmission power is notified. Then, the MSB of the TPC bit is used for the DPCH, the LSB of the TPC bit is used for the DSCH, or the MSB of the TPC bit is used for the DSCH.
By assigning the LSB of the TPC bit for the CH to the DPCH, it is possible to control the DPCH and DSCH for each slot.

Specifically, since a TPC bit notification slot for DSCH exists for each slot, the TPC bit generation unit 9 evaluates the DPCH channel quality for all slots (FIG. 16, step S71).

On the other hand, when there is no DSCH addressed to the own station (step S72, No), the TPC bit generation section 9 holds the previously transmitted TPC bit value and continues transmission (step S76). Alternatively, 0 or 1 for TPC
Formally fill bits. However, one-time base station transmission power control amount is set in advance. In this case, the base station transmission power control amount may be a system-only value or may be updated in n stages according to the moving speed of the mobile station. Further, when the DSCH addressed to the own station exists (step S72, Yes), the binary determination is performed similarly to FIG. 11 and FIG. 12 (step S54).

As described above, in the present embodiment, T
Due to the processing of the PC bit generation unit 9, the mobile station
The transmission power control for transmission is performed in DSCH slot units. As a result, it is possible to follow the received level fluctuation such as fading at a higher speed than in FIG.

FIG. 17 is a diagram showing an example of a detailed configuration of a portion for setting the quality difference and the quality information in the encoding section 10 in the control section 8. In FIG. 17, reference numeral 41 is a comparison unit,
The DSCH transmission frame difference between the frame number (or slot number) of the previous DSCH transmission and the frame number (or slot number) of the next DSCH transmission is compared with the burst threshold. Further, reference numeral 42 denotes a data transmission control unit, and when the DSCH transmission frame difference is larger than the burst threshold value, n is transmitted from the next DSCH transmission frame.
Before the frame (or slot), the quality difference or quality information is set in the encoder.

FIG. 18 is a diagram showing a method of setting the initial transmission power of the control unit 8 when the DSCHs received by the mobile station are separated by a certain distance or more. In communication using the DSCH, data is transmitted in bursts to mobile stations, and the burst period is arbitrarily determined. In addition, the mobile station has a time during which the DSCH is physically open but not received.

In the control unit 8 of the mobile station, the base station is its own mobile station.
Burst period (T _burst) (Fig.
18, step S81), this burst period is preset
When it is longer than the threshold value (TH) (step S82,
Yes), retransmit the initial transmission power determinant to the base station
Control to know. In addition, the initial transmission power determination factor
The method of obtaining is similar to the method shown in FIG.

Specifically, since the mobile station is notified of the next DSCH transmission timing by the base station in advance, the base station is notified n slots or m frames before the next DSCH transmission timing. The initial transmission power determining factor is re-notified (step S83).

As described above, in this embodiment, when the burst period becomes a certain period, the radio wave propagation condition between the mobile station and the base station changes, so that the DS transmitted last time is changed.
The transmission power of CH is meaningless, and excessive or insufficient transmission power of the base station occurs. Therefore, the initial transmission power value is updated by the processing of the control unit 8 after a certain burst period. This allows the base station to appropriately determine the initial transmission power at the time of the next transmission, so that traffic such as a retransmission request due to insufficient transmission power of the base station can be reduced, and the amount of data reception delay can be reduced accordingly. be able to. Further, it is possible to reduce the interference power to other cells due to the excessive transmission power of the base station, so that it is possible to reduce the retransmission request amount in the other cells, and the data reception delay amount accordingly.

FIG. 19 is a diagram showing a detailed configuration of a portion for setting the quality difference and the quality information in the control unit 8 to the encoding unit 10, which is different from FIG. In FIG. 19, 51
Is a counter for counting slots or frames, and is cleared only once at the beginning or end of a frame when the DSCH is physically opened. Also, 5
Reference numeral 2 denotes a comparison unit, which counts the number of slots or the number of frames counted by the counter 51 and determines whether the count value is a burst cycle. Reference numeral 53 denotes a data transmission control unit, which sets quality difference or quality information to the encoding unit 10 when the comparison unit 52 determines that the burst cycle is set.

FIG. 20 is a diagram showing a method of setting the initial transmission power of the control unit 8 when the mobile station periodically notifies the base station of the initial transmission power. In communication using the DSCH, data is transmitted in bursts to mobile stations, and the burst period is arbitrarily determined. In addition, the mobile station has a time during which the DSCH is physically open but not received.

The control unit 8 of the mobile station counts the number of slots or the number of frames after the channel is opened, and every preset constant period (P _burst ) (FIG. 20, step S9).
1) The base station is controlled to re-notify the initial transmission power deciding element (step S92). The method of determining the initial transmission power determining factor is the same as the method shown in FIG.

As described above, in this embodiment, the initial transmission power is periodically updated by the processing of the control unit 8. This allows the base station to more appropriately determine the initial transmission power for the next transmission.

[0073]

As described above, according to the present invention, the initial transmission power information on the DSCH and the TPC bit are notified to the base station by using the DPCCH which is one of the DPCHs. By this means, it is possible to obtain a wireless communication device that can realize transmission power control for DSCH in addition to transmission power control for DPCH.

According to the next invention, the mobile station is configured to notify the base station in advance of the DSCH channel quality information or channel quality difference information before the DSCH communication.
Data can be received with appropriate line quality from the start of H communication. By this means, it is possible to obtain a wireless communication device that can reduce traffic such as a retransmission request due to insufficient transmission power and a data reception delay amount. Further, since it is possible to reduce the interference power to other cells due to excessive transmission power, it is possible to obtain a wireless communication device capable of reducing the retransmission request amount in other cells.
Has the effect.

According to the next invention, the mobile station notifies the base station of the required transmission power determining element during DSCH communication. As a result, it is possible to obtain a wireless communication device capable of receiving data with appropriate line quality even during DSCH communication.

According to the next invention, the mobile station notifies the base station of the required transmission power determining element during DSCH communication. As a result, it is possible to obtain a wireless communication device capable of receiving data with appropriate line quality even during DSCH communication.

According to the next invention, the mobile station controls the transmission power for DSCH in units of DSCH frames. As a result, there is an effect that it is possible to obtain a wireless communication device capable of dynamically following a reception level variation such as fading.

According to the next invention, the mobile station controls the transmission power for DSCH in units of DSCH slots. As a result, even if the reception level changes due to fading,
Further, it is possible to obtain a wireless communication device capable of following at higher speed.

According to the next invention, since the radio wave propagation condition between the mobile station and the base station changes when the burst period reaches a certain fixed period, the initial transmission power value is updated after a certain constant burst period. . As a result, it is possible to obtain a wireless communication device capable of appropriately determining the initial transmission power for the next transmission.

According to the next invention, the initial transmission power is periodically updated. As a result, there is an effect that it is possible to obtain a wireless communication device that can more appropriately determine the initial transmission power for the next transmission.

According to the next invention, the initial transmission power information on the DSCH and the TPC bit are notified to the base station by using the DPCCH which is one of the DPCHs.
As a result, in addition to the transmission power control for the DPCH,
Furthermore, it becomes possible to control the transmission power for the DSCH.
Has the effect.

According to the next invention, the mobile station has previously notified the base station of the DSCH channel quality information or channel quality difference information before the DSCH communication.
Data can be received with appropriate line quality from the start of H communication. As a result, it is possible to reduce traffic such as a retransmission request due to insufficient transmission power, and it is possible to significantly reduce the data reception delay amount. Further, it is possible to reduce the interference power to other cells due to the excessive transmission power, so that it is possible to reduce the retransmission request amount in the other cells, and accordingly reduce the data reception delay amount.

According to the next invention, the mobile station notifies the base station of the required transmission power determining element during DSCH communication. As a result, it is possible to receive data with appropriate line quality even during DSCH communication.

According to the next invention, the mobile station notifies the base station of the required transmission power determining element during DSCH communication. As a result, it is possible to receive data with appropriate line quality even during DSCH communication.

According to the next invention, the mobile station controls the transmission power for DSCH in units of DSCH frames. As a result, there is an effect that it is possible to dynamically follow changes in the reception level such as fading. Also, by dynamically fading the base station transmission power,
It is possible to reduce the traffic such as the retransmission request due to the shortage of the transmission power of the base station, and the data reception delay amount can be greatly reduced. Further, since it becomes possible to reduce interference power to other cells due to excessive base station transmission power, it is possible to reduce the amount of retransmission requests in other cells, and it is possible to greatly reduce the amount of data reception delay.
Has the effect.

According to the next invention, the mobile station controls the transmission power for DSCH in units of DSCH slots. As a result, due to fluctuations in the reception level such as fading,
This has the effect of being able to follow at higher speed.

According to the next invention, since the radio wave propagation condition between the mobile station and the base station changes when the burst period reaches a certain fixed period, the initial transmission power value is updated after a certain constant burst period. . This allows the base station to appropriately determine the initial transmission power at the time of the next transmission, so that traffic such as a retransmission request due to insufficient transmission power of the base station can be reduced, and the amount of data reception delay can be reduced accordingly. There is an effect that it is possible. Further, since it becomes possible to reduce the interference power to other cells due to excessive base station transmission power, it is possible to reduce the amount of retransmission requests in other cells, and accordingly reduce the amount of data reception delay.
Has the effect.

According to the next invention, the initial transmission power is periodically updated. This has the effect that the base station can more appropriately determine the initial transmission power for the next transmission.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a wireless communication device (mobile station) according to the present invention.

FIG. 2 is a diagram showing a transmission power control method according to the first embodiment.

FIG. 3 is a diagram showing an operation when a mobile station determines initial transmission power before performing DSCH communication.

FIG. 4 is a diagram illustrating a detailed configuration example of a reception quality calculation unit.

FIG. 5 is a diagram illustrating a first operation example of a reception quality calculation unit.

FIG. 6 is a diagram showing a second operation example of the reception quality calculation unit.

FIG. 7 is a diagram illustrating a detailed configuration example of a reception quality calculation unit.

FIG. 8 is a diagram showing a first detailed configuration of a TPC bit generation unit.

FIG. 9 is a diagram showing a structure of a TPC bit.

FIG. 10 is a diagram showing a structure of a TPC bit.

FIG. 11 is a diagram illustrating a first operation example (binary case) of the TPC bit generation unit.

FIG. 12 is a diagram showing a second operation example (in the case of three values) of the TPC bit generation unit.

FIG. 13 is a diagram showing a method of generating TPC bits.

FIG. 14 is a diagram showing a specific example of TPC bit generation.

FIG. 15 is a diagram showing a second detailed configuration of a TPC bit generation unit.

FIG. 16 is a diagram illustrating an operation example of a TPC bit generation unit.

FIG. 17 is a diagram illustrating a detailed configuration example of a portion that sets quality difference and quality information in the control unit in the control unit.

FIG. 18 is a diagram showing a method of setting an initial transmission power of a control unit when a DSCH received by a mobile station is separated by a certain distance or more.

FIG. 19 is a diagram illustrating a detailed configuration example of a part that sets quality difference and quality information in the control unit in the encoding unit.

FIG. 20 is a diagram showing a method of setting an initial transmission power of a control unit when a mobile station periodically notifies an initial transmission power to a base station.

[Explanation of symbols]

1 receiving antenna, 2 receiving analog section, 3 A / D converting section (A / D), 4 RAKE searcher, 5 demodulating section, 6
Decoding section, 7 Reception quality calculation section, 8 Control section, 9
TPC bit generation unit, 10 encoding unit, 11 transmission control unit, 12 D / A conversion unit (D / A), 13 transmission analog unit, 14 transmission antenna, 21,21a channel quality calculation unit, 22,22a quality difference calculation unit, 31, 33, 3
6,38 up / down determination unit, 32,34,37,
39-bit generation unit, 35 selector, 41, 52 comparison unit, 42, 53 data transmission control unit, 51 counter.

Continued front page    F term (reference) 5K028 AA01 BB04 CC02 CC05 DD01                       DD02 HH05 MM12 SS02                 5K067 AA02 AA03 AA14 CC10 DD43                       DD44 DD45 DD48 EE02 EE10                       EE22 GG08 HH21 JJ13

Claims (16)

[Claims] 1. A "base station in which one physical channel is time-multiplexed for each user" using "an uplink dedicated physical channel for a plurality of mobile stations to individually transmit data and control information to the base station" In the wireless communication device on the mobile station side that controls the transmission power of the "downlink time-division physical channel for transmitting data from the mobile station to multiple mobile stations", the initial transmission power is set when the link of the downlink time-division physical channel is created. After that, when the downlink time division physical channel non-reception period is n frames or more, the control means for resetting the initial transmission power before the reception frame, and the base station during reception by the downlink time division physical channel For instructing to raise or lower or maintain the transmission power by
TPC bit generation means for generating a C (transmission power control) bit, and "the plurality of mobile stations individually provide control information to the base station, which is one of uplink dedicated physical channels for the initial transmission power and the TPC bit. And a transmission control means for notifying the base station of the transmission data after the mapping, and mapping to the "uplink dedicated control physical channel for transmission". 2. When a downlink time-division physical channel link is generated, a "common base station for transmitting pilot to a plurality of mobile stations is transmitted from a base station performing downlink time-division physical channel communication". "Pilot channel" or "detection means for detecting a pilot of a downlink dedicated control physical channel for a base station to individually transmit control information to a plurality of mobile stations"; and a detection result of the pilot and a control gain of AGC. On the basis of the link quality information of the downlink time-division physical channel with reference to the downlink common pilot channel or downlink dedicated control physical channel with the base station, or the difference between the link quality information and the target quality value (link quality difference information) Reception quality calculation means for calculating, the base station using the line quality information or the line quality difference information as the transmission data. The wireless communication device according to claim 1, wherein the wireless communication device is notified. 3. The reception quality calculation means calculates predetermined line quality information of a downlink dedicated control physical channel after averaging N slots or after averaging M frames based on the detection result of the pilot and the control gain of AGC. , Then, based on the channel quality information of the downlink dedicated control physical channel, when the base station performs transmission on the downlink time division physical channel with the same transmission power as when transmitting on the downlink dedicated control physical channel, downlink time division physical channel The wireless communication device according to claim 2, wherein channel quality information of the channel is calculated. 4. The reception quality calculation means includes: "a base station transmits pilot and control information to a plurality of mobile stations in a time-multiplexed manner, transmitted from a base station communicating on a downlink time division physical channel. A downlink "time-division control physical channel" pilot is detected, and predetermined line quality information of the downlink time-division control physical channel after N slot averaging or N frame averaging is detected based on the detection result of the pilot and the AGC control gain. The wireless communication device according to claim 2, wherein the wireless communication device is calculated. 5. The TPC bit generation means determines in advance a transmission power control amount for a downlink time division physical channel, and a slot in an uplink dedicated physical channel frame is up / down of transmission power for a downlink time division physical channel. In the first TPC bit notification slot for instructing down, and when there is no downlink time division physical channel addressed to the own station, the previous TPC bit value is held, and the slot in the uplink dedicated physical channel frame is First
If there is a downlink time division physical channel addressed to the own station in the TPC bit notification slot of, a new TPC bit for the downlink time division physical channel is generated based on the line quality and the reference quality, and the uplink individual The slot in the physical channel frame is the transmission power up for “downlink dedicated physical channel for the base station to individually transmit data and control information to a plurality of mobile stations”.
The wireless communication device according to claim 2, 3 or 4, wherein TPC bits for a downlink dedicated physical channel are generated in the case of the second TPC bit notification slot for instructing / down. 6. The TPC bit generation means generates TPC bits for a downlink dedicated physical channel and a downlink time division physical channel in all slots in an uplink dedicated physical channel frame, and for the downlink time division physical channel. In the TPC bit generation process, when there is no downlink time division physical channel addressed to the own station,
The TPC bit value of the previous time is held, and when a downlink time division physical channel addressed to the own station exists, a new TPC bit is generated based on the line quality and the reference quality. The wireless communication device according to 3 or 4. 7. When the reception burst period of the downlink time division physical channel extends for a certain period, the channel quality information or the channel quality difference information of the downlink dedicated control physical channel, the downlink common pilot channel or the downlink time division control physical channel is changed to the next time. 7. The base station is notified before the reception of the downlink time-division physical channel is started.
The wireless communication device according to any one of 1. 8. A downlink dedicated control physical channel, periodically,
Link quality information or link quality difference information of the downlink common pilot channel or downlink time division control physical channel,
7. The wireless communication apparatus according to claim 2, wherein the base station is notified before the reception of the next downlink time division physical channel is started. 9. A base station, wherein "one physical channel is time-multiplexed for each user" using "uplink dedicated physical channel for a plurality of mobile stations to individually transmit data and control information to the base station". In the transmission power control method on the mobile station side that controls the transmission power of the “downlink time division physical channel for transmitting data from a mobile station to multiple mobile stations”, the initial transmission power information is set when the link of the downlink time division physical channel is created. The first transmission step of setting and notifying the base station of the initial transmission power information by controlling the uplink dedicated physical channel; and, when the downlink time division physical channel non-reception period is n frames or more, before the reception frame. A reset step for resetting the initial transmission power information, and a command for instructing the base station to increase or decrease or maintain the transmission power during reception on the downlink time division physical channel. TP
A TPC bit generation step of generating a C bit, the initial transmission power information after the resetting and the TPC bit being one of the uplink dedicated physical channels "a plurality of mobile stations individually provide control information to the base station. A second transmission step of mapping to an uplink dedicated control physical channel for transmission and notifying the mapped transmission data to the base station. 10. Further, when a downlink time-division physical channel link is generated, "a base station transmits a pilot to a plurality of mobile stations, the common downlink is transmitted from a base station performing downlink time-division physical channel communication." Pilot channel "
Or a detection step of detecting a pilot of "downlink dedicated control physical channel for the base station to individually transmit control information to a plurality of mobile stations", based on the detection result of the pilot and the control gain of the AGC, Reception for calculating channel quality information of downlink time-division physical channel with reference to downlink common pilot channel or downlink dedicated control physical channel with base station, or difference between the channel quality information and reference quality value (channel quality difference information) The transmission power control method according to claim 9, further comprising: a quality calculation step, wherein the channel quality information or the channel quality difference information is notified to the base station as the transmission data. 11. The reception quality calculation step calculates predetermined channel quality information of a downlink dedicated control physical channel after averaging N slots or after averaging M frames, based on the detection result of the pilot and the control gain of AGC. , Then, based on the channel quality information of the downlink dedicated control physical channel, when the base station performs transmission on the downlink time division physical channel with the same transmission power as when transmitting on the downlink dedicated control physical channel, downlink time division physical channel The transmission power control method according to claim 10, wherein channel quality information of the channel is calculated. 12. In the reception quality calculation step, a “downlink for a base station to transmit pilot and control information to a plurality of mobile stations by time multiplexing is transmitted from a base station performing downlink time division physical channel communication. The pilot of the "time division control physical channel" is detected, and predetermined line quality information of the downlink time division control physical channel after averaging N slots or averaging N frames is calculated based on the detection result of the pilot and the control gain of AGC. The transmission power control method according to claim 10, further comprising: 13. In the TPC bit generation step, a transmission power control amount for a downlink time division physical channel is determined in advance, and a slot in an uplink dedicated physical channel frame is up / down of transmission power for a downlink time division physical channel. In the first TPC bit notification slot for instructing down, and when there is no downlink time division physical channel addressed to the own station, the previous TPC bit value is held and the slot in the uplink dedicated physical channel frame is First
If there is a downlink time division physical channel addressed to the own station in the TPC bit notification slot of, a new TPC bit for the downlink time division physical channel is generated based on the line quality and the reference quality, and the uplink individual The slot in the physical channel frame is the transmission power up for “downlink dedicated physical channel for the base station to individually transmit data and control information to a plurality of mobile stations”.
13. The transmission power control method according to claim 10, 11 or 12, wherein a TPC bit for a downlink dedicated physical channel is generated in the case of the second TPC bit notification slot for instructing / down. 14. The TPC bit generating step generates TPC bits for a downlink dedicated physical channel and a downlink time division physical channel in all slots in an uplink dedicated physical channel frame, and generates TPC bits for the downlink time division physical channel. In the TPC bit generation process, when there is no downlink time division physical channel addressed to the own station,
11. The previous TPC bit value is held and a new TPC bit is generated based on the line quality and the reference quality when a downlink time division physical channel addressed to the own station exists. 11. The transmission power control method according to 11 or 12. 15. When the reception burst period of the downlink time division physical channel extends over a certain period, the channel quality information or the channel quality difference information of the downlink dedicated control physical channel, the downlink common pilot channel or the downlink time division control physical channel is transmitted next time. 11. The base station is notified before the reception of the downlink time-division physical channel is started.
15. The transmission power control method according to claim 14. 16. Periodically, channel quality information or channel quality difference information of a downlink dedicated control physical channel, a downlink common pilot channel or a downlink time division control physical channel is transmitted to a base station before the start of the next downlink time division physical channel reception. A notification is made to the station.
4. The transmission power control method according to any one of 4 above.