KR100933144B1 - Method and apparatus for channel transmission in mobile communication system supporting uplink service - Google Patents

Abstract

The present invention relates to a power setting method and apparatus for a mobile communication system supporting an uplink service, wherein a TFC selector supports a first data channel and a HARQ that does not support a HARQ. Determining transmission format (TF) information for data to be transmitted through a second data channel and carrying control information for the first data channel and the first data channel according to the determined transmission format information Determine gain factors for a control channel and a second control channel that carries control information for the second data channel and the second data channel. The physical channel transmission controller receives the gain coefficients and reduces the gain coefficient of the second data channel if the total transmit power required to transmit the channels exceeds a predetermined maximum allowable power. A gain adjuster adjusts the transmission power of the channels using the reduced gain factor and gain coefficients of the first data channel and the first control channel and the second control channel, respectively.

WCDMA, E-DCH, uplink packet transmission, Node-B scheduling, gainfactor, retransmission

Description

TECHNICAL AND APPARATUS FOR TRANSMITTING CHANNEL IN MOBILE TELECOMMUNICATIONS SYSTEM SUPPORTING UPLINK SERVICE}

1 shows a basic conceptual diagram of a situation in which an E-DCH is used.

2 is a diagram illustrating a basic procedure for transmitting and receiving an E-DCH.

3 is a diagram illustrating an example of data transmission through an E-DCH in a WCDMA system.

4 is a diagram illustrating a structure of a transmitting end of a conventional terminal.

5 is a diagram illustrating an example of a problem occurring when retransmission of a conventional E-DCH.

6 is a view showing an example of a change in the transmission power of the terminal according to the present invention.

7 is a diagram illustrating a power control procedure of a physical layer of a terminal according to the first embodiment of the present invention.

8 is a view showing a transmitting device of a terminal for a preferred implementation of the first embodiment according to the present invention.

9 illustrates a power control procedure of a physical layer of a terminal according to the second embodiment of the present invention.

10 illustrates a TFC selection process according to a third embodiment of the present invention.

11 is a diagram illustrating a transmitting device of a terminal according to a third embodiment of the present invention.

12 is a view showing a power setting result of the terminal according to the fourth embodiment of the present invention.

13 is a diagram illustrating a power setting procedure of a terminal according to a fourth embodiment of the present invention.

14 is a view showing a transmitting device of a terminal according to a fourth embodiment of the present invention.

15 is a diagram illustrating an example of an apparatus for transmitting a terminal according to a fourth embodiment of the present invention.

The present invention relates to a mobile communication system supporting an uplink service, and more particularly, to a channel transmission method and apparatus of a mobile communication system in consideration of characteristics of uplink channels.

Enhanced Enhanced Uplink Dedicated CHannel (hereinafter referred to as E-DCH) is referred to as Wideband Code Division Multiple Access (WCDMA). Proposed. With the introduction of E-DCH, the use of Adaptive Modulation and Coding (AMC), Hybrid Automatic Retransmission Request (HARQ) and Node B (Node B) control scheduling methods in uplink is being discussed.

1 is a diagram illustrating a basic conceptual diagram of a situation in which an E-DCH is used.

Referring to FIG. 1, the Node B 100 supports an E-DCH, and channel conditions of terminals 101, 102, 103, and 104 using the E-DCH indicated by reference numerals 111, 112, 113, and 114. Determines and performs the appropriate scheduling for each terminal. That is, the Node B 100 allocates a low data rate to a remote terminal 104 while maintaining the measured noise rise value not to exceed the target noise increase value in order to increase the performance of the entire system. For example, scheduling is performed by allocating a high data rate to a nearby terminal 101.

2 is a diagram illustrating a basic procedure for transmitting and receiving an E-DCH.

Referring to FIG. 2, in step 203, the node B 201 and the terminal 202 configure an E-DCH. The configuration process includes the delivery of messages over a dedicated transport channel.

In step 204, the terminal 202 informs the node B 201 of the scheduling information. The scheduling information is terminal transmission power information for which the reverse channel information can be known, or includes extra power information that can be transmitted by the terminal and an amount of data to be transmitted in a buffer of the terminal.

In step 211, the node B 201 schedules each terminal while monitoring the scheduling information received from various terminals.

In step 205, when the node B 201 determines to allow the reverse packet transmission to the terminal 202, the node B 201 transmits scheduling allocation information to the terminal 202. In this case, the scheduling allocation information includes the allowable rate, the allowable timing, and the maintenance / upward adjustment / navigation adjustment regarding the previous data rate.

In step 212, the terminal 202 determines the transport format (hereinafter referred to as TF) of the E-DCH to be transmitted in the reverse direction by using the scheduling allocation information.

In step 206 and step 207, the terminal 202 transmits UL (Uplink) packet data including a transport format resource indicator (TFRI) and E-DCH data, which is information related to the determined TF, to the node B 201. .

In step 213, the node B 201 determines whether there is an error in the received TF related information and E-DCH data. At this time, if there is any error, the node B 201 determines whether it is negative (Negative Acknowledge: NACK), and if there is no error, it determines that it is positive (ACK).

In step 208, the node B 201 transmits the ACK and NACK information to the terminal 202 through an ACK / NACK channel according to the result determined in step 213. In this case, the terminal 202 transmits new data when receiving the ACK, and retransmits the previous data when the terminal 202 receives the NACK.

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3 is a diagram illustrating an example of data transmission through an E-DCH in a WCDMA system.

As illustrated in FIG. 3, when data 316 including video telephony, uploading of multimedia mails, games, etc. to be transmitted is generated, the mobile terminal 317 is generated. The data 316 is spread with the code assigned to the physical channel 318 and transmitted to the base station 319.
The E-DCH is transmitted by being mapped to an enhanced dedicated physical data channel (E-DPDCH) using a code multiplexing scheme. The E-DPDCH is a DPDCH to which a DCH, which is a typical reverse transport channel of a UE, is mapped, a Dedicated Physical Control Channel (DPCCH) that carries control information related to the DPDCH, and an E-DPCCH that carries control information related to the E-DPDCH. (Enhanced DPCCH) and the like. The terminal sets the transmission power of the physical channels according to the maximum allowed transmission power of the currently set terminal. The maximum transmission power is determined according to the transmission capacity (capability) of the power amplifier of the terminal and the minimum value of the transmission power set in the network. In this case, the transmission power of the remaining physical channels except for the DPCCH is determined according to a power ratio compared to the DPCCH.

4 is a diagram illustrating a structure of a transmitting end of a conventional terminal.

Referring to FIG. 4, the mobile terminal 317 encodes data to be transmitted through a data channel via a coding chain 305. In addition, control information necessary for reception of the data channel is generated separately. Herein, the data channel means DPDCH or E-DPDCH, and the control channel means DPCCH or E-DPCCH.

The control information and the encoded data are modulated by modulators 300 and 306, respectively. The modulated control information and data are spread through the channelization codes Cc and Cd of the data channel and the control channel in the spreaders 301 and 307, and then transmitted to the gain adjusters 302 and 308, respectively. The spread control information and data are multiplied by the gain regulators 301 and 308 by β _c , β _d , which are gain factors given to the data channel and the control channel, and then multiplexed through the multiplexer 303. do. The multiplexed data is input to the scrambling unit 304, scrambled with a scrambling code S _{dpch, n} of a dedicated physical channel (DPCH), and then converted into an RF signal through a radio frequency (RF) unit 309. And wirelessly transmitted by the antenna.

The gain coefficient is a value for setting power of physical channels based on a dedicated physical control channel (DPCCH) that is being power controlled, and is set according to the data size and service type of each physical channel. The gain coefficient is set according to a transport format combination (TFC) as one of components of a transport format (TF). The gain factor is determined by a transport format combination (TFC) selection part of a higher layer that determines the format of transport channel data and is transmitted to the physical layer, where the physical layer sets the transmission power of each physical channel according to the gain factor. do.

At this time, the terminal adjusts the gain factor of each physical channel so as not to exceed the maximum allowed power.

In case of using the E-DCH in addition to the transmission channels defined in the conventional system, if only the TFC satisfying the allowable power level is selected through the TFC selection, the total transmit power is If the maximum allowed power is exceeded, the gain coefficients of all physical channels are scaled equally. In the case of E-DCH, HARQ technology is supported. In HARQ, even when retransmission is performed, demodulation is possible at the receiving end only when transmitting using the same transmission format as the initial transmission. Therefore, the TFC selection part always selects the same TF as the initial transmission when retransmitting data of the E-DCH regardless of the allowable TFC. In general, the transmission power at the time of retransmission is set at the same level as the initial transmission.

In some situations, there may be a case where DCH data does not exist during initial transmission of the E-DCH and DCH data occurs during retransmission. In addition, when the transmission time interval (TTI) of the E-DCH is set to be smaller than the minimum TTI of the DCH, it is necessary to retransmit the E-DCH data when the TF and the transmission power of the DCH are fixed. May occur. In such a situation, if the UE uses the same power as the initial transmission for retransmission of the E-DCH, there is a high possibility that the total transmission power will result in exceeding the maximum allowable power. In this situation, if the power of all physical channels is reduced to the same scale while maintaining the power ratio, transmission of all physical channels is possible within the maximum allowable power, but the transmission quality of each physical channel cannot be guaranteed.

5 is a diagram illustrating an example of a problem occurring when retransmission of a conventional E-DCH.

As shown, in the T1 time period, the UE initially transmits the E-DCH data through the E-DPDCH. Since there is no DCH data in the T1 time period, the total transmit power 401 does not exceed the maximum allowable power (Pmax) 407. However, since the DCH data is transmitted through the DPDCH in the T2 time period in which retransmission of the E-DCH occurs, the total transmission power 402 including the E-DPDCH and the DPDCH exceeds Pmax 407. Therefore, as shown by reference numeral 405, the transmission power of the E-DPDCH, DPDCH and DPCCH is adjusted at the same ratio. Therefore, after the transmit power of the physical channels is adjusted, the total transmit power 404 in the T3 time period does not exceed the maximum allowable power 407.

However, since all of the E-DPDCH, DPDCH and DPCCH in the T3 time period are transmitted using less power than the T2 time period, the quality of the physical channels is all degraded at the receiving end. In particular, if the priority of the DCH and the E-DCH is different, the power quality of all the physical channels is always adjusted to the same scale, and thus the transmission quality of the DCH or the E-DCH may be degraded due to retransmission. For example, even if the DCH is used for high-priority voice calls, DCH data is transmitted through very low levels of power in some slots within one TTI due to retransmission of low-priority E-DCHs. The quality of may deteriorate.

Therefore, when there is an E-DCH supported HARQ, there is a need for a technique for more efficiently controlling the transmission power of each physical channel when the total transmission power of the terminal exceeds the maximum allowed transmission power.

The present invention provides a channel transmission method and apparatus for a mobile communication system when supporting a packet service through reverse channels and when the total transmission power of the terminal exceeds the maximum allowable power.

The present invention provides a method and apparatus for channel transmission in a mobile communication system when data of an E-DCH is retransmitted.

The present invention provides a method and apparatus for channel transmission in a mobile communication system according to transmission conditions or channel priorities of transmission power of the E-DCH and the DCH when the data of the E-DCH is retransmission.

A method for transmitting a first channel that does not support HARQ and a second channel that supports HARQ in a terminal of a mobile communication system supporting an uplink service according to the present invention includes a transmission power factor for channels. Determining whether the total transmit power required to transmit the channels exceeds the maximum allowable power, and if the total transmit power exceeds the maximum allowable power, scaling down the transmission power factor for the second channel. And transmitting data through the first channel and the second channel by using the scaled down transmission power coefficient corresponding to the second channel and the transmission power coefficient corresponding to the first channel. .

In addition, in a mobile communication system supporting an uplink service according to the present invention, a terminal device transmitting a first channel not supporting a HARQ and a second channel supporting HARQ may include a transmission power factor for channels. Determine and determine if the total transmit power required to transmit the channels exceeds the maximum allowable power, and if the total transmit power exceeds the maximum allowable power, scaling down the transmit power factor for the second channel. First and second channel generators for channel coding and modulating data of the first channel and the second channel to generate first and second data frames, the scaled down transmission power coefficient and the first channel; Transmit power of the first and second channels for transmitting the first and second data frames using a transmit power coefficient for And a gain adjuster to adjust.

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Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the preferred embodiment of the present invention. Like reference numerals are used to designate like elements even though they are shown in different drawings, and detailed descriptions of related well-known functions or configurations are not required to describe the present invention. If it is determined that it can be blurred, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

The present invention described below ensures the transmission quality of the remaining channels by reducing the transmission power of the E-DPDCH to which the E-DCH is mapped when the total transmission power in the terminal supporting the E-DCH exceeds the maximum allowable power of the terminal. do.

Hereinafter, the transmission power change of the terminal according to the present invention will be briefly described.

6 is a view showing an example of a change in the transmission power of the terminal according to the present invention.

Referring to FIG. 6, E-DCH data is initially transmitted through the E-DPDCH in the T1 time period. Since there is no DCH data in the T1 time period, the total transmit power 501 does not exceed the maximum allowable power (Pmax) 507. However, since the DCH data is transmitted through the DPDCH in the T2 time period in which retransmission of the E-DCH data occurs, the total transmission power 502 exceeds the maximum allowable power 507. At this time, as shown by reference numeral 505, only the transmit power of the E-DPDCH is adjusted. After the transmission power of the E-DPDCH is adjusted, the total transmission power 504 does not exceed the maximum allowable power 507 of the terminal in the T3 time period, and the power level of the remaining channels, that is, E-DPCCH / PDCH / DPCCH. Remains the same as the T2 time period. Therefore, it is possible to avoid the problem that the power level of the DCH is reduced due to the E-DCH, it is possible to stably transmit the DCH data.

The transmission power of the E-DCH and the DCH is controlled by varying the transmission power coefficient predetermined for the physical channel to which the channel is mapped. In the WCDMA system, the transmission power factor means a gain factor inherent to each channel. 6 illustrates a case where priority is given to transmission of the DCH by adjusting the gain factor of the E-DCH. In other cases, it is also possible to adjust the power of the DCH when the priority of the E-DCH is high by the priority between the DCH and the E-DCH. In the following description, the transmission power is adjusted by using the gain coefficient of each channel.

Hereinafter, various embodiments according to the present invention will be described.

First embodiment

In the first embodiment according to the present invention, the gain coefficient of a specific channel, that is, the E-DPDCH, is adjusted again to adjust the power of the entire channel so that the total transmit power does not exceed the maximum allowable power in the upper layer of the UE. According to the first embodiment, when both the E-DCH data and the DCH data exist, the terminal checks whether the E-DCH data is retransmission. If the check result is retransmission, the gain coefficient of the E-DPDCH to which the E-DCH is mapped is reset at the corresponding transmission time.

7 illustrates a power control procedure of a physical layer of a terminal according to the first embodiment of the present invention.

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Referring to FIG. 7, in step 601, the UE detects a transmission request for E-DPDCH / DPDCH / DPCCH data including respective gain coefficients. In step 602, the UE that detects the transmission request predicts the total transmission power Ptx by using gain coefficients of channels to be transmitted. That is, the terminal measures the transmission power of the terminal to check the power state for each slot. Based on the measured transmission power, the terminal predicts the total transmission power Ptx of the channels to be transmitted using the given gain factors required for the next transmission.

In step 602, the terminal checks whether the total transmission power Ptx exceeds the maximum allowable power Pmax. If not exceeding, the process proceeds to step 606 to transmit the data to each corresponding channel using the gain coefficients.

If the total transmission power exceeds the maximum allowable power, in step 603, the UE determines whether the E-DCH data to be transmitted through the E-DPDCH is initial transmission or retransmission. In the case of the initial transmission as a result of the determination, in step 604, the terminal adjusts the power of all channels to the same level while maintaining a constant power ratio between channels. In another embodiment, the UE postpones data transmission of a channel having a lower priority according to the priority of DCH or E-DCH data and selects a gain coefficient according to a conventional procedure for the data of the remaining channels, or a channel having a high priority. First set the power for data and set the transmit power for the remaining channels so that the total transmit power does not exceed the maximum allowed power.

If the E-DCH data is retransmitted as a result of the determination, in step 605, the UE regains the gain factor of the E-DPDCH so that the total transmission power does not exceed the maximum allowable power and adjusts only the power of the E-DPDCH. In this case, the method for obtaining the gain factor will be described later in detail. After completing step 605 or step 604, the terminal proceeds to step 606 to transmit the corresponding data to the channels using the gain coefficients of the E-DPDCH and the gain coefficients of other channels.

In FIG. 7, the first transmission is determined whether the total transmission power exceeds the maximum power. However, in operation 602, the E-DCH data is determined to determine whether the total transmission power exceeds the maximum allowable power. The order of the step 603 of determining whether it is retransmission may be reversed.
When the total transmission power is exceeded due to retransmission of the E-DPDCH, it occurs only during one TTI, and thus, the UE performs the procedure of FIG. 7 for each TTI. If the total transmission power is actually increased by the power control and the transmission power exceeds the maximum allowable power during the actual transmission, the power of all channels is adjusted to the same scale in the usual manner while maintaining the power ratio.

The gain factor of the E-DPDCH such that the total transmission power does not exceed the maximum allowable power can be obtained as shown in Equation 1 below. This means that the retransmission power of the E-DCH is reduced by a certain ratio from the previous transmission power within a range not exceeding the maximum allowable power.

,

은 TFC 선택파트에 의해서 결정되는 E-DPDCH/DPCCH/DPDCH의 이득 계수들이고,

은 전체 송신 파워가 최대 허용 파워를 넘지 않도록 하는 E-DPDCH의 새로운 이득 계수이며,

은

,

을 이용할 경우 예상되는 전체 전송 파워로서 조절되기 이전의 값인

가 적용되었음을 나타내기 위하여 "ori"를 첨부하여 나타내었고,

는 단말에게 허용되는 최대 전송 파워(즉, 최대 허용 파워)이다.here,

,

Are gain coefficients of E-DPDCH / DPCCH / DPDCH determined by the TFC selection part,

Is a new gain factor for the E-DPDCH that ensures that the total transmit power does not exceed the maximum allowed power.

silver

,

Is the estimated total transmit power,

"Ori" is attached to indicate that is applied,

Is the maximum transmit power (that is, the maximum allowable power) allowed for the terminal.

를 구하는 식이다. 상기 <수학식 1>을 통해서 얻은

는

에 비해서 작게 된다. 즉, 이를 통해 단말은 최대 허용 파워를 초과하지 않는 전체 전송 파워 이내에서 E-DPDCH를 전송할 수 있게 된다. 상기 <수학식 1>에서

허수 값이면 상기 E-DPDCH의 전송 파워는 0으로 간주된다. 한편 상기 <수학식 1>에 따라 계산된

가 미리 정해지는 최소값보다 작은 경우에 단말은, 현재 구간에서 E-DCH 데이터의 재전송을 수행하지 않고 다음 구간에서 재전송을 시도할 수 있다. Equation 1 shows a new gain factor of the E-DPDCH to reduce the power of the E-DPDCH while maintaining the transmission power of the DPDCH and the DPCCH when the total transmission power exceeds the maximum allowable power.

To obtain. Obtained through Equation 1

Is

It becomes smaller than that. That is, the UE can transmit the E-DPDCH within the total transmission power does not exceed the maximum allowable power. In Equation 1

If it is an imaginary value, the transmission power of the E-DPDCH is regarded as zero. Meanwhile, calculated according to Equation 1

Is smaller than a predetermined minimum value, the UE may attempt retransmission in the next interval without performing retransmission of the E-DCH data in the current interval.

In an environment in which the E-DPCCH is transmitted only when the E-DPDCH exists, it is possible not to transmit the E-DPCCH unless the E-DPDCH is retransmitted. In addition, when information on the power ratio of the E-DPDCH is adjusted due to the receiver structure of the base station scheduler, the terminal may signal information indicating that the power ratio of the E-DPDCH is adjusted by physical layer signaling to the base station.

In the E-DCH service environment, the transmission power of the E-DCH is controlled through the gain coefficient of the E-DPDCH set according to the TF. In addition, the transmission power adjusted by the gain factor can be further adjusted as necessary. For example, the transmission power of the E-DCH to be serviced is controlled according to the required quality of service (QoS). Here, when the transmission power is increased, one bit indicating that the transmission power is increased is included in the E-DCH control information and signaled to the base station. As another example, when transmitting the amount of E-DCH data to be transmitted through the E-DCH, the terminal increases the transmission power of the E-DCH. In this case, one bit for notifying that the transmission power is increased is included in the E-DCH control information and signaled to the base station through the E-DPCCH.

Hereinafter, a method of signaling that the transmission power of the E-DPDCH is adjusted in the physical layer will be described.

An 1-bit indicator indicating that the transmission power of the E-DPDCH is adjusted is allocated to the E-DPDCH. Table 1 below shows the type of control information including a 1-bit identifier indicating that the transmission power has been adjusted and the bit structure for each control information.

Control information Number of bits TFI 5 Power deboost indicator One Power boost indicator One MAC-e signaling indicator One NDI 2

The roles of the information shown in Table 1 are as follows.

The TFI (TF Index) is an index indicating the transmission format (TF) of the E-DCH transmitted to the corresponding TTI, and the power de-boosting indicator reduces the transmission power of the E-DCH according to the first embodiment of the present invention. Identifier representing. The power boosting indicator is an identifier indicating that the transmission power of the E-DCH has been increased in consideration of QoS, and the MAC-e signaling indicator has increased the transmission power of the E-DCH in order to transmit buffer status information. Representative identifier. NDI (New Data Indicator) is an identifier for informing the initial transmission packet as HARQ information. As described above, the E-DPCCH is allocated by using bits distinguished for each control information.

Here, the power de-boosting indicator, the power boosting indicator and the MAC-e signaling indicator have a direct correlation with the increase / decrease or normal transmission of transmission power, and as another embodiment of the control information, as shown in Table 2 below. Use -bit.

Control information Number of bits TFI 5 Power indicator 2 NDI 2

Table 2 shows an example of configuration of physical layer signaling information for notifying E-DCH power adjustment using a 2-bit identifier. In this case, the power indicator of Table 2 composed of 2 bits may signal the information as shown in Table 3 below.

Power indicator Contents 00 Normal power 01 power de-boosting 10 power boosting 11 MAC-e signaling

Table 3 shows information indicated by a power indicator using a 2-bit identifier. Further, in Table 3, MAC-e signaling generally means an increase in transmission power of the E-DCH, and thus, Table 3 may be modified and used as shown in Table 4 below.

Power indicator Contents 00 Normal power 01 power de-boosting 10 power boosting and MAC-e signaling 11 reserved case

Table 4 shows information indicated by a power indicator using a 2-bit identifier.

Hereinafter, a transmitting apparatus of a terminal for a preferred implementation of the first embodiment according to the present invention will be described with reference to FIG. 8.

,

인 이득계수들(705)을 가지고, E-DCH의 이득 계수인

를 도 6의 절차에 따라 재설정하는 기능을 담당한다.Referring to FIG. 8, the UE uses DPCCH, DPDCH, E-DPCCH, and E-DPDCH as uplink channels. The TFC selector 701 sets corresponding gain coefficients according to the requirements of the data rate and transmission quality of each channel. The HARQ controller 726 transmits control information for rate matching of data encoded according to the characteristics of a corresponding channel to a rate matcher 710 including a HARQ buffer, and HARQ for setting a gain factor during initial transmission and retransmission. Information is sent to the physical channel transmission controller 706. The physical channel transmission controller 706 sets parameters necessary for transmission of the physical channel. Specifically, the physical channel transmission controller 706 is the power parameters 704, such as Pmax, Ptx, ori for the initial transmission and retransmission from the HARQ controller 726 and from the TFC selector 701

,

Gain coefficients 705, which is the gain factor of the E-DCH

It is responsible for the function of resetting according to the procedure of FIG.

When control information for the DCH, that is, the DPDCH, is received, the DPCCH generator 719 generates the control information as a DPCCH frame, and the coding block 720 encodes the DPCCH frame. The encoded data is modulated by the modulator 721, spread by the spreader 708 into the channelization code Cc of the DPCCH, and then multiplied by the gain factor β _c of the DPCCH in the gain regulator 722 and then multiplexer ( 723).

와 곱해진 후 다중화기(723)로 전송된다.When the data to be transmitted to the DCH and the E-DCH is received, the E-DPDCH and DPDCH generators 703 and 714 transmit the data to the DCH and E- according to the TFC information selected for each transmission format of the corresponding channel in the TFC selector 701. A DCH frame is generated, and coding blocks 709 and 715 encode the DCH and E-DCH frames, respectively. The DPDCH data encoded in the coding block 715 is modulated by the modulator 716, spread by the spreader 717 into the channel division code Cd of the DPDCH, and then in the gain controller 718, the gain coefficient of the DPDCH.

Multiplied by and then sent to multiplexer 723.

(707)와 곱해진 후 상기 다중화기 (723)로 전송된다.
또한 상기 E-DPDCH에 대해 선택된 TFC 정보를 포함하는 상기 E-DCH에 대한 제어정보(즉 E-DPDCH에 대한 제어 정보)가 수신되면, E-DPCCH 생성기(731)는 상기 E-DCH에 대한 제어정보를 포함하는 E-DPCCH 프레임을 생성한다. 상기 E-DPCCH 프레임은 코딩블록(727)에서 인코딩되고 변조기(728)에 의해 변조된 후, 확산기(729)에서 E-DPCCH의 채널구분코드 Cec로 확산되고, 이득 조절기(730)에서 E-DPCCH의 이득 계수

와 곱해진 후 상기 다중화기(723)로 전송된다.The E-DPDCH frame generated by the generator 703 of the E-DPDCH is likewise encoded in the coding block 709 and then transmitted to the rate matcher 710. The rate matcher 710 rate matches the encoded E-DPDCH data under the control of a HARQ controller 726. The rate matched data is modulated by the modulator 711 and then spread by the spreader 712 to the channel division code Ce of the E-DPDCH, and by the gain adjuster 713 the physical channel transmitter 706 is reset.

After being multiplied by 707, it is sent to the multiplexer 723.
In addition, when control information for the E-DCH including the TFC information selected for the E-DPDCH is received (ie, control information for the E-DPDCH), the E-DPCCH generator 731 controls the E-DCH. Generate an E-DPCCH frame containing information. The E-DPCCH frame is encoded in coding block 727 and modulated by modulator 728, then spread in channel spreader Cec of E-DPCCH in spreader 729 and E-DPCCH in gain adjuster 730. Gain factor

Multiplied by and sent to the multiplexer 723.

The data transmitted from the gain regulators 722, 718, 713, 730 are multiplexed by the multiplexer 723, input to the scrambling unit 724, and scrambled by the scrambling code S _{dpch, n} , and then the RF unit. 725 is RF converted and transmitted.

Second embodiment:

In the second embodiment, when the total transmission power exceeds the maximum allowable power when the E-DCH data is retransmission, the total transmission power is adjusted by reducing the gain factor of the E-DCH by a predetermined gain offset.

In the second embodiment of the present invention, when the total transmission power of the terminal exceeds the maximum allowable power, a new gain factor of the E-DPDCH is calculated through Equation 2 below.

는 상기 이득 오프셋을 나타내는 것으로,상위 계층의 시그널링을 통해서 설정될 수 있다. here,

Denotes the gain offset and may be set through signaling of a higher layer.

9 illustrates a power control procedure of a physical layer of a terminal according to the second embodiment of the present invention.

Referring to FIG. 9, in step 621, the UE detects a transmission request for E-DPDCH / DPDCH / DPCCH data including respective gain coefficients. In step 622, the UE that detects the transmission request predicts the total transmission power Ptx using the gain coefficients of the channels to be transmitted. That is, the terminal measures the transmission power of the terminal to check the power state for each slot. Based on the measured transmission power, the terminal predicts the total transmission power Ptx of the channels to be transmitted using the given gain coefficients for the next transmission.

In step 622, the terminal checks whether the total transmission power Ptx exceeds a predetermined maximum allowable power Pmax. If not exceeding, the process proceeds to step 626 to transmit the data to each corresponding channel using the gain coefficients.

If the total transmission power exceeds the maximum allowable power, in step 623, the UE determines whether the E-DCH data to be transmitted through the E-DPDCH is initial transmission or retransmission. In the case of the initial transmission as a result of the determination, in step 624, the terminal adjusts the power of all channels to the same level while maintaining a constant power ratio between channels. In another embodiment, the UE postpones data transmission of a channel having a lower priority according to the priority of DCH or E-DCH data and selects gain coefficients according to a conventional procedure for the data of the remaining channels, or a channel having a high priority. First set the power for data and set the transmit power for the remaining channels so that the total transmit power does not exceed the maximum allowed power.

If the E-DCH data is retransmitted as a result of the determination, in step 625, the UE regains the gain factor of the E-DPDCH and adjusts only the power of the E-DPDCH. At this time, the gain coefficient is reduced by a predetermined gain offset as shown in Equation 2 above. After completing step 625 or step 624, the terminal proceeds to step 626 to transmit the corresponding data to the channels using transmission power according to gain coefficients of the E-DPDCH and gain coefficients of other channels.

Since the transmitting apparatus of the terminal according to the second embodiment is the same as that of FIG. 8, the second embodiment will be described below with reference to FIG. 8.

Here, the rest of the configuration except for the physical channel transmission controller 706, the HARQ controller 706 and the rate matcher 710 of the transmitter of the terminal is the same as FIG.

,

등의 이득 계수들(705)을 수신하여, 단말의 최대 허용 파워인 Ptx.ori가 최대 허용 파워 Pmax를 초과하는 경우, 미리 정해지는 이득 옵셋에 따라 E-DCH의 새로운 이득 계수인

를 도 7의 절차에 따라 구한다.The physical channel transmission controller 706 is responsible for resetting the gain factor of the E-DPDCH. The physical channel transmission controller 706 sets parameters necessary for transmission of the physical channel. Specifically, the physical channel transmission controller 706 includes information 702 indicating initial transmission and retransmission received from the HARQ controller 726, power parameters 704 such as Pmax, Ptx, ori, and the TFC selector ( Received from 701

,

When receiving the gain coefficients 705 and the like, the maximum allowable power Ptx.ori of the terminal exceeds the maximum allowable power Pmax, the new gain coefficient of the E-DCH according to a predetermined gain offset

Is obtained according to the procedure of FIG. 7.

If the total transmit power exceeds the maximum allowable power even after adjusting the gain factor of the E-DPDCH, the transmit power of the remaining channels is reduced while maintaining a constant power ratio between the channels. In addition, when information on the power ratio of the E-DPDCH is adjusted due to the receiver structure of the base station scheduler, the terminal may signal information indicating that the power ratio of the E-DPDCH is adjusted by physical layer signaling to the base station. In this case, signaling of the physical channel indicating that the transmission power of the E-DPDCH is adjusted may be performed using a 1-bit identifier or a 2-bit identifier as described in the first embodiment.

Third embodiment:

Hereinafter, in the third embodiment of the present invention, the terminal sets power of all channels by selecting a gain factor of the E-DPDCH such that the total transmission power does not exceed the maximum allowable power in consideration of retransmission.

In the third embodiment of the present invention, unlike the initial transmission, when the DCH occurs at the time of retransmission of the E-DCH, the gain factor is selected in a manner different from the initial setting in the procedure of selecting the TFC.
In particular, the terminal checks the transmission power of the plurality of channels to be transmitted in units of slots and gradually reduces the transmission power of a specific channel according to the priority of each channel. The priority may be determined according to whether a channel is guaranteed to be retransmitted or a control channel.

First, a transmission environment will be described in order to assist in understanding the present embodiment. In the transmission environment according to the present embodiment, one DCH and one E-DCH are set at the same time, and possible transmission format combinations (TFCs) of the respective channels are set as shown in Tables 5 and 6 below. Since there is only one DCH, the TFC actually includes a TF set (TF set: TFS) composed of respective TFs, and the TF of the E-DCH is denoted as an E-TF. As described below, TFs can transmit more data as the index value increases. Tables 5 and 6 show cases where the DCH and the E-DCH are mapped and transmitted to different physical channels. When the DCH and the E-DCH are mapped and transmitted on the same physical channel, a gain factor according to each TF combination is set.

In this embodiment, in order not to obscure the description and the subject matter of the present invention, detailed description of the scheduling operation required for the E-DCH is omitted, and it is assumed that resources are allocated to be transmitted by scheduling of the E-DCH.

[Example of TF setting of DCH] TFI TF Gain factor 0 0x100 beta0 One 1 x 100 beta1 2 2 x 100 beta2 3 3 x 100 beta3

[Example of TF setting of E-DCH] TFI E-TF Gain factor 0 0x300 beta4 One 1 x 300 beta5 2 2 x 300 beta6

When the DCH and the E-DCH are mapped to different physical channels, since the total transmit power available to the terminal is the sum of the transmit powers of all the physical channels, the terminal selects a TFC that can be transmitted in consideration of the transmit power of the physical channels. Set it.

On the other hand, if there is E-DCH data to be retransmitted, the UE selects the same E-TF as the E-TF during initial transmission. This is because the DCH has a higher priority at the time of retransmission and thus may not be able to select the same E-TF as the initial transmission. This can also occur due to channel conditions or scheduling.

Specifically, it is as follows. When the UE compares the E-TF of the initial transmission and the E-TF of the retransmission, and determines that the E-TF index of the initial transmission is less than or equal to the E-TF index of the retransmission, the terminal determines that the TF of the initial transmission can be sufficiently supported. Select the E-TF of the initial transmission and the corresponding gain factor. As a result of the comparison, if the E-TF index of the initial transmission is larger than the E-TF index of the retransmission, the UE selects the same E-TF as the E-TF of the initial transmission and selects a new gain factor adjusted for retransmission. . Table 7 below shows an example of setting a gain factor according to Table 6.

[Example of Setting Gain Coefficient in Third Embodiment] Initial transfer TF of E-DCH that can be transmitted at retransmission Final selection result of TFC selection on retransmission E-TF 2 One 2 Gain factor beta6 Beta5 Beta5

Referring to Tables 6 to 7, when E-TF = 2 is selected during initial transmission, the UE transmits (2x300) bits of data using a gain factor = beta6. If there is DCH data during retransmission and the amount of data that can be transmitted by the UE through the E-DCH is limited to E-TF = 1, the UE selects a TFC for the DCH from the allowable TFC and transmits using the remaining power. Through the procedure of selecting possible E-TFs of the E-DCH, E-TF = 1 and gain factor = beta5 are selected. Since E-TF = 2 of the initial transmission is greater than E-TF = 1 of the retransmission, E-TF_new = 2 and gain factor = beta5 are selected for the E-DCH during retransmission.

Hereinafter, the TFC selection process according to the third embodiment of the present invention in the channel configuration as described above will be described with reference to FIG. 10.

In this embodiment, it is assumed that the TTIs of the DCH and the E-DCH are the same so that TFC selection can be performed at the same time point. If the TFC seleciton of the DCH and the E-DCH is incorrect or the TTI of the two channels is not possible to perform the TFC selection at the same time, the TFC selection of the high priority channel is performed and the remaining power is used. Perform the TFC selection process for the other remaining channels .

10 is a diagram illustrating a TFC selection process according to a third embodiment of the present invention.

Referring to FIG. 10, in step 802, the UE checks whether data exists in the DCH and the E-DCH.

If only the DCH data is present as a result of the investigation, the UE may select a TFC for the DCH through a normal TFC selection process in step 804. If only the E-DCH data exists as a result of the investigation, the UE selects the E-TF of the E-DCH that can be transmitted in step 803.

If both the E-DCH and the DCH data exist, the UE compares the priority of the E-DCH (P_EDCH) and the priority of the DCH (P_DCH) in step 805.

As a result of the comparison, when the priority (P_DCH) of the DCH is high, in step 806, the UE first selects a TFC required for data transmission of the DCH among the allowable TFCs, and proceeds to step 808 and is allocated to the TFC selected for the DCH. After selecting the E-TF for transmitting data to the E-DCH within the remaining power except power, the process proceeds to step 810.

As a result of the comparison, if the priority of the E-DCH is high, the UE selects the E-TF of the E-DCH first in step 807, proceeds to step 809, transmits the data of the E-DCH, and predicts the remaining power. Select TFC for data transfer. Alternatively, the transmission of one of the two data is delayed according to the priority of the DCH or E-DCH data, the TF is selected for the remaining channel data according to a conventional procedure, and the flow proceeds to step 815.
On the contrary, when the comparison result shows that the priority (P_EDCH) of the E-DCH is high, in step 807, the UE first selects the E-TF of the E-DCH among the allowable E-TFs, and proceeds to step 809. After selecting a TFC for transmitting the data of the DCH within the remaining power except for the power allocated to the E-TF selected for the DCH, the process proceeds to step 810. In another embodiment, when both the E-DCH and DCH data are terminated, the UE postpones transmission of one of the two channels according to the priority of the DCH and the E-DCH data, and performs the conventional procedure on the data of the remaining channels. After selecting the TF, go to step 815.

Next, in step 810, the UE determines whether the transmission data of the E-DCH is initial transmission or retransmission. In the case of initial transmission as a result of the determination, in step 815, the UE transmits the E-DCH through the selected E-TF.

In case of retransmission, the UE proceeds to step 811 and compares the E-TF (TF_initial) during initial transmission with the E-TF (ie, TF_re) selected in step 803, 807 or 808.

 If the index of the initial transmission E-TF (TF_initial) is lower than or equal to the index of the retransmission E-TF (TF_re) in step 812, the UE determines the E-TF (TF_initial) of the initial transmission and the corresponding gain in step 813. Select the factor (gain factor (TF_initial)). On the contrary, when the comparison result indicates that the index of the initial transmission E-TF (TF_initial) is higher than the index of the retransmission E-TF (TF_re), the UE transmits the new ETF to the new TF (TF_new) in step 814. The gain factor (TF_re) of the retransmission E-TF is selected as a new gain factor. Thereafter, in step 815, the UE transmits DCH and E-DCH data using the E-TF, TFC, and gain coefficients selected in steps 802 to 814, respectively.

11 is a transmission apparatus of a terminal according to the third embodiment of the present invention.
Here, the UE uses a DPCCH, a DPDCH, an E-DPDCH, and an E-DPCCH as an uplink channel. However, the configuration related to the E-DPCCH is omitted for convenience of description.

Referring to FIG. 11, the TFC selector 901 determines the transport formats (TFs) of the channels. The TFC selector 901 receives the predicted total transmit power (Ptx) information 902 and the maximum allowable power (Pmax) information 903 and transmits HARQ information indicating initial transmission / retransmission through the HARQ controller 913. 904 is received. The TFC selector 901 transfers the information 905 on the TFC, E-TF, and gain coefficients determined by performing the procedure of FIG. 10 to the physical channel transmission controller 906. The physical channel transmission controller 906 sets the gain coefficients 907 to the gain controllers 926, 921, 916 of the corresponding channel.

와 곱해진 후 다중화기(927)로 전송된다.When the control information 908 for the DCH, that is, the DPDCH, is received, the DPCCH generator 922 generates the control information 908 as a DPCCH frame, and the coding block 923 encodes the DPCCH frame. The encoded data is modulated through modulator 924 and spread by channel code Cc of DPCCH by spreader 925 and then gain coefficient of DPCCH in gain regulator 926.

Multiplied by and then sent to multiplexer 927.

와 곱해진 후 다중화기(927)로 전송된다.When the data 909 to be transmitted on the DCH and the E-DCH is received, the DPDCH and the E-DPDCH generators 917 and 910 transmit the data 909 according to the TFC information selected for each transmission format in the TFC selector 901. A DPDCH and E-DPDCH frame is generated, and coding blocks 918 and 911 encode the DPDCH and E-DPDCH frames, respectively. The DPDCH data encoded in the coding block 918 is modulated by the modulator 919, transmitted to the spreader 920, spread to the channel division code Cd of the DPDCH, and then the gain regulator 921 gain coefficient of the DPDCH.

Multiplied by and then sent to multiplexer 927.

(907)와 곱해져서 상기 다중화기 (927)로 전송된다. The encoded E-DPDCH data from the coding block 911 is sent to a rate matcher 912. The rate matcher 912 performs rate matching on the encoded E-DPDCH data under the control of a HARQ controller 913. The rate matched data is modulated through modulator 914 and then spread in channel spreader Ce of E-DPDCH in spreader 915 and by physical channel transmission controller 906 in gain adjuster 916. Gain factor of the set E-DPDCH

It is multiplied by 907 and sent to the multiplexer 927.

The data from the gain regulators 926, 921, 916 are multiplexed in the multiplexer 927, input to the scrambling 928, scrambled with a scrambling code S _{dpch, n} , and then RF received through the RF unit 929. The signal is converted and transmitted.

Fourth embodiment:

Hereinafter, in the fourth embodiment of the present invention, when the total transmit power of the terminal exceeds the maximum allowable power, the transmit power of the E-DPDCH is preferentially reduced.

In the fourth embodiment, the operation of re-calculating the gain coefficient of the E-DCH to satisfy the maximum allowable power is performed for each slot, which is a power control unit, so that the total allowable transmit power does not exceed the maximum allowable transmit power regardless of initial transmission or retransmission. At any time, the gain coefficient of the E-DCH is reset. This is because the total transmit power of the terminal is controlled by a transmit power control (TPC) command received in every slot from the base station. Specifically, the TPC command is applied to the power adjustments of the DPCCH. Since the power ratio between DPCCH and DPDCH / E-DPDCH / E-DPCCH is maintained by the gain factor of the corresponding channel, the TPC command is related to the total transmit power of the terminal.

FIG. 12 is a diagram illustrating an example in which the total transmit power exceeds the maximum allowable power in units of slots and, when exceeded, adjusts only the transmit power of the E-DPDCH to which the E-DCH is mapped. Since the E-DPCCH carries control information for demodulating and decoding the E-DPDCH, reliability must be ensured. Therefore, even when the E-DPDCH is adjusted, the power ratio 1200 of the E-DPCCH is maintained.

Referring to FIG. 12, a transmission power control (TPC) command in one TTI continues to indicate an increase in power (UP) so that the total transmission power exceeds the maximum allowable power. Reference numeral 1202 denotes a setting of the transmission power according to the prior art, and if the total transmission power reaches the maximum allowable power, the transmission power of all channels is reduced by the same ratio even if the TPC command indicating the power increase continues to be received. Reference numeral 1204 denotes a setting of the transmission power according to the fourth embodiment of the present invention. If the TPC command indicating the power increase is continuously received after the total transmission power reaches the maximum allowable power, transmission of the E-DPDCH is performed. Only the power is reduced and the transmit power of the remaining channels, DPDCH / E-DPCCH / DPCCH, is increased at the same rate while maintaining a predetermined power ratio.

Even if the transmission power of the E-DPDCH is reduced by a certain ratio, the operation of adjusting the transmission power of the E-DPDCH may be repeated when the total transmission power exceeds the maximum allowable power. At this time, when the transmission power of the E-DPDCH becomes a predetermined minimum value, for example, 0, the E-DPDCH is not transmitted. Nevertheless, if the total transmit power exceeds the maximum allowable power, the transmit power of each channel is reduced while maintaining the power ratio for the remaining channels.

Hereinafter, a transmission power setting procedure of a terminal according to the fourth embodiment of the present invention will be described in detail with reference to FIG. 13.

Referring to FIG. 13, in step 1301, the physical layer of the UE determines whether the transmission time of the E-DPDCH or DPDCH / DPCCH / E-DPCCH is transmitted in every slot, and if it is the transmission time of the physical channels, total transmission power of the physical channels. Compare Ptx with a predetermined maximum allowable power Pmax. Here, the total transmission power is a transmission power predicted according to the TPC command received from the base station.

If the total transmission power Ptx exceeds the maximum allowable power Pmax as a result of the comparison, the process proceeds to step 1303. At this time, Ptx is Ptx, ori of <Equation 1>. The gain factor of the E-DPDCH whose total transmission power Ptx does not exceed the maximum allowable power Pmax is obtained. The method of obtaining the gain coefficient may be obtained in the same manner as in Equation 1. As another example, the terminal may reduce the gain factor of the E-DPDCH by a predetermined gain offset as shown in Equation 2 above. When the gain factor is obtained, the process proceeds to step 1304.
In step 1304, the total transmission power applying the obtained gain factor exceeds the maximum allowable power again. Here, Ptx 'means the total transmission power updated by applying the new gain factor obtained in step 1303. In this case, if the total transmission power still exceeds the maximum allowable power, the flow proceeds to step 1305. In the case of using Equation 2, the terminal may repeat step 1303 while gradually decreasing the gain factor of the E-DPDCH until the total transmission power does not exceed the maximum allowable power.
As a result of the comparison in step 1304, the transmission power of the E-DPDCH, i.e., the new transmission coefficient obtained by applying the gain coefficient newly calculated in step 1303, is the minimum possible value. If the power still exceeds the maximum allowable power it can be seen that the power resources of the terminal is insufficient, the flow proceeds to step 1305. In step 1305, the gain coefficients of the remaining channels are calculated to reduce the total transmission power while maintaining the same power ratio for the remaining channels E-DPCCH / DPDCH / DPCCH. That is, in step 1305, the power ratio between the DPCCH and the E-DPCCH, the DCCH and the DPDCH, and the DPCCH and the E-DPCCH is maintained. The above steps are performed every slot. Since the E-DPCCH should be transmitted with maintaining reliability even in the slot where the E-DPDCH is not transmitted, the E-DPCCH is transmitted with reduced transmission power on the same scale as other channels.
In step 1306, the UE transmits data of E-DPDCH / DPDCH / DPCCH / E-DPCCH with transmission power according to the obtained gain coefficients.

14 is a diagram illustrating a transmitting device of a terminal according to the fourth embodiment.

Here, the configuration in the case where the terminal transmits DPDCH / DPCCH / E-DPDCH / E-DPCCH. DPCCH / DPDCH / E-DPCCH generators 1413, 1414, 1415, and 1404 that are parts corresponding to the components described with reference to FIGS. 8 and 11 in the terminal, the rate matching unit 1420, and the HARQ controller 1407. ), Coding blocks 1417, 1418, 1419, 1416, modulators 1422, 1423, 1424, 1425, spreaders 1426, 1427, 1428, 1429, gain regulators 1430, 1431, 1432 and 1433, the channel multiplexer 1434, the scrambling 1435, and the like will not be described in detail, and only portions directly related to the fourth embodiment of the present invention will be described.

를 상기 TFC 선택기(1401)로부터 전달 받는다. 또한, 물리 채널 송신 제어기(1408)는 최대 허용 파워 정보(1405)를 수신한다. 파워엠프 제어기(1409)는 매 슬롯마다 기지국으로부터 수신되는 TPC 명령에 따라서 전력 옵셋 Poffset을 이용하여 파워엠프(1412)를 제어하고, 상기 TPC 명령에 따라 예측되는 전송 파워 값 P_est 1410을 물리 채널 송신 제어기(1408)에 전체 전송 파워 Ptx로서 전달한다. 상기 물리 채널 송신 제어기(1408)는 상기 전체 전송 파워 값을 이용하여 도 13과 같은 절차에 따라 각 채널들의 이득 계수들을 재설정하고, 재설정된 이득 계수들

를 이득 조절기들(1430, 1431, 1432, 1433)로 제공한다.하여 도면 13과 같은 절차에 따라 각 채널의 이득 계수를 재설정할 수 있다.If data transmission is required, the TFC selector 1401 selects a TFC for the E-DCH data 1402 and the DCH data 1403, and the physical channel transmission controller 1408 selects the gain factor values corresponding to the TFCs. 1405), i.e.

Is received from the TFC selector 1401. In addition, the physical channel transmission controller 1408 receives the maximum allowable power information 1405. The power amplifier controller 1409 controls the power amplifier 1412 using the power offset Poffset according to the TPC command received from the base station in every slot, and transmits the transmission power value P_est 1410 predicted according to the TPC command to the physical channel transmission controller. To 1408 as the total transmit power Ptx. The physical channel transmission controller 1408 resets the gain coefficients of each channel according to the procedure of FIG. 13 using the total transmission power value, and resets the gain coefficients.

Is provided to the gain regulators 1430, 1431, 1432, and 1433. The gain coefficient of each channel can be reset according to the procedure shown in FIG.

In the fourth embodiment of the present invention, when the gain coefficient of the E-DPDCH is recalculated so as not to exceed the maximum allowable power in each slot, the entire transmit power P_est is provided from the power amplifier controller 1409 in every slot. However, due to the structural characteristics of the terminal in which the RF unit and the modem are separated, it may be impossible for the physical channel transmission controller 1408 to receive full transmission power information in every slot from the power amplifier controller 1409.
Therefore, in order to solve the above problems, FIG. 15 shows another example of the terminal transmission apparatus according to the fourth embodiment of the present invention.
In the modified fourth embodiment, the physical channel transmission controller 1508 receives P_est in a predetermined slot without receiving P_est in every slot from the power amplifier controller 1509. In this case, since P_est is not accurately known in the remaining slots except the specific slot, the physical channel transmission controller 1508 predicts all possible P_est values for the specific slot and the remaining slots, and predicts the predicted P_est values. Compute the gain coefficients of E-DPDCH for. Here, the P_est values of the remaining slots are obtained by adding or subtracting a power control unit value (called Delta) according to TPC to the P_est value of the specific slot.

As an example, when P_est is received every 2 slots, an example of a gain factor to be predicted is shown.

1th slot: P_est1 =>

2th slot: When receiving up, P_est2 = P_est1 + delta =>

When receiving down, P_est2 = P_est1-delta =>

를 모두 구한다. In this example, the UE receives P_est1 every second slot, performs the procedure of FIG. 13 according to P_est1, calculates a gain factor of the E-DPDCH, and then calculates the gain factor of the next slot in the estimated total transmission power P_est2. Accordingly, the gain coefficient of the next slot is calculated. In this case, the next slot receives a TPC command of UP and a case of receiving a DOWN command.

Find all

값들을 미리 계산하며, 매 슬롯마다 수신한 TPC 명령을 바탕으로 상기

값들 중 하나를 선택하여 적용한다. As described above, the physical channel transmission controller 1508 has three kinds:

Values are calculated in advance and based on the received TPC command in each slot,

Select and apply one of the values.

이 된다.When P_est is received from the power amplifier controller 1509 for each 'K' slot, the number of predicted gain coefficients of the remaining slots is

Becomes

DPCCH / DPDCH / E-DPCCH / E-DPDCH generators 1513, 1514, 1515, and 1504, which are portions corresponding to the components described with reference to FIGS. 8 and 11 in FIG. 15, the plate matching unit 1520, and HARQ controller 1507, coding blocks 1517, 1518, 1519, 1516, modulators 1522, 1523, 1524, 1525, spreaders 1526, 1527, 1528, 1529, and gain adjusters ( 1530, 1531, 1532, and 1533, the channel multiplexer 1534, the scrambling 1535, and the like will be omitted, and portions directly related to the fourth embodiment of the present invention will be described below.

delete

delete

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를 상기 TFC 선택기(1501)로부터 전달 받는다. 또한, 물리 채널 송신 제어기(1508)는 최대 허용 파워 정보(1505)를 수신한다. 파워앰프 제어기(1509)는 매 슬롯마다 기지국으로부터 수신되는 TPC 명령에 따라서 파워앰프(1512)를 제어하고, 미리 정해지는 특정 슬롯에서 상기 TPC 명령에 따라 예측되는 전체 전송 파워 값 P_est0(1510)을 물리채널 송신 제어기(1508)로 전달한다.
물리 채널 송신 제어기(1508)는 상기 특정 슬롯마다 상기 P_est1(1510)를 전달받아서 최대 허용 파워를 초과하지 않는 각 채널의 이득 계수들(1543)을 구하여 상기 이득 조절기들(1430, 1431, 1432, 1433)로 제공하고, 특히 상기 특정 슬롯을 제외한 나머지 슬롯들에 대해서는 가능한 P_estk_up/down (k=1, 2,...2^(K-1))을 예측하여 상기 예측된 P_estk_up/down에 대해서 E-DPDCH의 이득 계수들

(1543)을 각각 계산한다. 상기 가능한 경우의 모든 이득 계수들을 계산한 이후, 상기 물리채널 송신 제어기(1508)는 상기 특정 슬롯 이후의 k번째 슬롯마다 TPC 명령을 수신하여, 해당하는 이득 계수(

)를 상기 E-DPDCH의 이득 조절기(1533)로 전달하게 된다. 이때 E-DPDCH를 제외한 나머지 채널들의 전송 파워는 파워 앰프(1512)에 의해 동일한 스케일로 조절될 수 있다.The TFC selector 1501 selects a TFC for the E-DCH data 1502 and the DCH data 1503, and the physical channel transmission controller 1508 obtains gain coefficient values 1505 corresponding to the TFC, i.e.

Is received from the TFC selector 1501. In addition, the physical channel transmission controller 1508 receives the maximum allowable power information 1505. The power amplifier controller 1509 controls the power amplifier 1512 according to the TPC command received from the base station in every slot, and physically transmits the total transmit power value P_est0 1510 predicted according to the TPC command in a predetermined slot. Forward to channel transmission controller 1508.
The physical channel transmission controller 1508 receives the P_est1 1510 for each specific slot to obtain the gain coefficients 1543 of each channel that do not exceed the maximum allowable power to obtain the gain regulators 1430, 1431, 1432, and 1433. ), And predict possible P_estk_up / down (k = 1, 2, ... 2 ^(K-1) ) for the remaining slots except for the specific slot, and E- for the predicted P_estk_up / down. Gain Coefficients of the DPDCH

Compute 1543 respectively. After calculating all the gain coefficients in the possible case, the physical channel transmission controller 1508 receives a TPC command for every k-th slot after the specific slot, so that the corresponding gain coefficient (

) Is transferred to the gain controller 1533 of the E-DPDCH. In this case, the transmission power of the remaining channels except for the E-DPDCH may be adjusted to the same scale by the power amplifier 1512.

Fifth Embodiment

Hereinafter, according to the fifth embodiment of the present invention, when the total transmit power of the UE exceeds the maximum allowable transmit power, the power of the E-DPDCH channel is first reduced, and the power of the channels having a lower priority is sequentially reduced.

First, it is assumed that a DPDCH / DPCCH / E-DPDCH / E-DPCCH channel is transmitted. In this case, in order to set the priority for each channel, the retransmission is considered first, and if the control channel is considered next, the priority of the channel can be set as DPCCH / E-DPCCH / DPDCH / E-DPDCH. In addition, if the control channel is considered first and if retransmission is considered next, the priority of the channel may be set to DPCCH / DPDCH / E-DPCCH / E-DPDCH.

Hereinafter, a case in which the priority of each channel is set to DPCCH / E-DPCCH / DPDCH / E-DPDCH will be described as an example. First, if the total transmit power of the UE exceeds the maximum allowable transmit power, the transmit power of the E-DPDCH having the lowest channel priority is adjusted using a gain factor or a power offset value, and power adjustment is not performed for the remaining channels. Do not.

Although the transmission power of the E-DPDCH is set to a predetermined minimum value, for example, 0, when the total transmission power of the UE exceeds the maximum allowable power, the transmission power of the E-DPCCH is adjusted and the remaining channels are adjusted. No power adjustment is performed. At this time, since the E-DPCCH carries control information necessary for demodulating and decoding the E-DPDCH, the E-DPCCH is adjusted to maintain at least a predetermined minimum power (non-zero). Even if the transmission power of the E-DPCCH is set to the minimum power, power adjustment to maintain at least a predetermined minimum power for the remaining channels DPCCH and DPDCH when the total transmission power of the UE exceeds the maximum allowable power. Are performed sequentially.

Sixth embodiment

In the sixth embodiment of the present invention, if the total allowable power exceeds the maximum allowable power, and when the maximum allowable power is exceeded, the transmit power of the E-DPDCH is reduced by the minimum TTI. The transmission power of the E-DPDCH can be reduced by adjusting the gain factor of the E-DPDCH.

Although the transmission power of the E-DPDCH is reduced by the minimum TTI, when the total transmission power exceeds the maximum allowable power by the power control generated by the slot unit, the overall transmission power is maintained while maintaining the power ratio between the channels. Reduce the transmit power of all channels to the same scale so as not to exceed the maximum allowable power. In this case, the channels mean DPDCH, DPCCH, E-DPCCH, etc., including the E-DPDCH.

Specifically, when the E-DPDCH is set to 2ms or 10ms TTI, and there is a DPDCH transmitted in 10ms or more TTI, the UE has a maximum allowable power of the total transmit power in units of 2ms TTI which is the minimum TTI of the E-DPDCH. Check if it exceeds and adjust the transmit power of E-DPDCH in 2ms unit. If there are 15 slots in the 10ms TTI and 3 slots in the 2ms TTI, the UE adjusts the transmission power of the E-DPDCH in units of 2ms and then adjusts the total transmission power in consideration of power control in units of slots. do

The detailed execution procedure of the terminal operating in the above-described manner is the same as in the fourth embodiment. However, it is preferable that the period for performing the operation is set to the minimum TTI unit, in particular, the minimum TTI of the E-DPDCH instead of the slot unit.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

According to the present invention, when the data transmitted through the DCH occurs during packet service through the E-DCH, and the total transmission power exceeds the maximum allowable power, the priority is reduced by reducing only the transmission power of the lower priority E-DPDCH. Has the effect of ensuring the transmission quality of the remaining high channels and efficiently using the transmission power of the terminal.

Claims (41)

A method of transmitting a first channel that does not support HARQ and a second channel that supports HARQ, in a terminal of a mobile communication system supporting uplink service, Determining a transmit power factor for the channels and verifying that the total transmit power required to transmit the channels exceeds a maximum allowable power; Scaling down the transmission power factor for the second channel if the total transmission power exceeds the maximum allowable power; And transmitting data through the first channel and the second channel by using the scaled down transmission power coefficient corresponding to the second channel and the transmission power coefficient corresponding to the first channel. Channel transmission method. The method of claim 1, wherein the scaling down is performed. Channel transmission method characterized in that performed in every slot unit. The method of claim 1, wherein the total transmission power, And a transmission power coefficient for the first channel and the second channel and a transmission power control (TPC) command by the system. The method of claim 1, wherein when the transmission power factor of the second channel is scaled down to a predetermined minimum value or less, And uniformly scaling down transmission power coefficients corresponding to the remaining channels including the first channel. The method of claim 4, wherein the minimum value is, And a state in which the second channel is not transmitted. The method of claim 1, wherein if the total transmission power exceeds the maximum allowable power even after the transmission power coefficient of the second channel is scaled down, the transmission power coefficients of the remaining channels except for the second channel are uniformly scaled down. And further comprising a process. The method of claim 1, wherein the transmission power coefficients of the remaining channels other than the second channel when the total transmission power exceeds the maximum allowable power even after the transmission power coefficient of the second channel is scaled down are prioritized for each channel. And scaling down sequentially according to the channel transmission method. The method of claim 7, wherein the priority for each channel, A channel supporting retransmission has a lower channel priority than a channel not supporting retransmission, and a channel carrying data has a lower channel priority than a channel carrying control information. Transmission method. The method of claim 1, wherein the scaling down is performed. And when the data to be transmitted on the second channel is retransmission data, scaling down the transmission power factor of the second channel. The method of claim 1, wherein if the data to be transmitted on the second channel is initial transmission data, the transmission power coefficients of all channels including the second channel are uniform so that the total transmission power does not exceed the maximum allowable power. And scaling down the channel. According to claim 1, If the data to be transmitted of the second channel is the initial transmission data, the transmission power coefficients of all channels including the second channel in advance so that the total transmission power does not exceed the maximum allowable power, And scaling down sequentially according to a predetermined priority of each channel. The method of claim 11, wherein the priority of each channel, A channel supporting retransmission has a lower channel priority than a channel not supporting retransmission, and a channel carrying data has a lower channel priority than a channel carrying control information. Transmission method. The method of claim 1, wherein the scaling down is performed. Obtaining a predicted total transmit power according to a transmit power control (TPC) command received from a base station in a predetermined slot, Obtaining a first transmission power coefficient of the second channel such that the estimated total transmission power does not exceed the maximum allowable power; Providing the first transmission power coefficient as the scaled down transmission power coefficient for the specific slot; Using the predicted total transmit power, for the at least one next slot following the particular slot, the total transmit power value increased by a predetermined power control unit value and the total transmission reduced by the power control unit value. Obtaining a power value and corresponding to the increased total transmit power value and the reduced total transmit power value such that the increased total transmit power value and the reduced total transmit power value do not exceed the maximum allowable power, respectively. Obtaining second transmission power coefficients of the second channel, respectively; Receiving a TPC command in the at least one next slot, and selecting one of the obtained second transmission power coefficients according to whether the received TPC command indicates an increase (UP) or a decrease (DOWN); , And providing the selected second transmission power coefficient as the scaled down transmission power coefficient in the at least one next slot. The method of claim 1, wherein the transmission power coefficients, A channel transmission method characterized in that each is determined based on the transmission format selected in accordance with the scheduling assignment information received from the base station. A terminal apparatus for transmitting a first channel that does not support HARQ and a second channel that supports HARQ in a mobile communication system supporting uplink service, Determine a transmit power factor for the channels and verify that the total transmit power required to transmit the channels exceeds the maximum allowable power, so that if the total transmit power exceeds the maximum allowable power, the transmit power for the second channel A controller for scaling down the coefficients, First and second channel generators for channel coding and modulating data of the first channel and the second channel to generate first and second data frames; A gain adjuster for adjusting transmission power of the first and second channels for transmitting the first and second data frames by using the scaled down transmission power coefficient and the transmission power coefficient for the first channel. Channel transmission device, characterized in that. The method of claim 15, wherein the controller, And when the total transmission power exceeds the maximum allowable power, scaling down the transmission power factor of the second channel in units of every slot. The method of claim 15, wherein the controller And determining the total transmission power based on transmission power coefficients for the first channel and the second channel and a transmission power control (TPC) command by the system. The method of claim 15, wherein the controller, And when the transmission power coefficient of the second channel is scaled down to a predetermined minimum value or less, uniformly scaling down transmission power coefficients corresponding to the remaining channels including the first channel. The method of claim 18, wherein the minimum value is, And a state in which the second channel is not transmitted. The method of claim 15, wherein the controller, If the total transmission power exceeds the maximum allowable power even after the transmission power coefficient of the second channel is scaled down, the transmission power coefficients of the remaining channels except for the second channel are uniformly scaled down. Device. The method of claim 15, wherein the controller, If the total transmission power exceeds the maximum allowable power even after the transmission power coefficient of the second channel is scaled down, the transmission power coefficients of the remaining channels except the second channel are sequentially scaled down according to the priority of each channel. The channel transmission apparatus further comprises the step of. The method of claim 21, wherein the priority of each channel, A channel supporting retransmission has a lower channel priority than a channel not supporting retransmission, and a channel carrying data has a lower channel priority than a channel carrying control information. Transmission device. The method of claim 15, wherein the controller, And when the data to be transmitted on the second channel is retransmission data, scaling down the transmission power factor of the second channel. The method of claim 15, wherein the controller, If the data to be transmitted on the second channel is initial transmission data, the transmission power coefficients of all channels including the second channel are uniformly scaled down so that the total transmission power does not exceed the maximum allowable power. Channel transmission device. The method of claim 15, wherein the controller, If the data to be transmitted of the second channel is initial transmission data, the transmission power coefficients of all channels including the second channel are sequentially arranged in order of channel priority so that the total transmission power does not exceed the maximum allowable power. And scaling down the channel. The method of claim 25, wherein the priority of each channel is: A channel supporting retransmission has a lower channel priority than a channel not supporting retransmission, and a channel carrying data has a lower channel priority than a channel carrying control information. Transmission device. The method of claim 15, wherein the controller, In a predetermined predetermined slot, obtain a predicted total transmit power according to a transmit power control (TPC) command received from a base station, Obtaining a first transmit power factor of the second channel such that the estimated total transmit power does not exceed the maximum allowable power, Providing the first transmit power coefficient for the particular slot as the scaled down transmit power coefficient to a gain adjuster of the second channel, Using the predicted total transmit power, for the at least one next slot following the particular slot, the total transmit power value increased by a predetermined power control unit value and the total transmission reduced by the power control unit value. Find the power value, The increased total transmit power value and the reduced total transmit power value of the second channel corresponding to the increased total transmit power value and the reduced total transmit power value, respectively, so as not to exceed the maximum allowable power. Obtain second transmission power coefficients, respectively, Receive a TPC command in the at least one next slot, select one of the obtained second transmit power coefficients according to whether the received TPC command indicates an increase (UP) or a decrease (DOWN), And provide the selected second transmission power coefficient as the scaled down transmission power coefficient in the at least one next slot. The method of claim 15, wherein the transmission power coefficients, And each channel is determined based on transmission formats selected according to scheduling assignment information received from the base station. delete delete delete delete delete delete delete delete delete delete delete delete delete

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