KR20060046609A - A method and apparatus for setting the power offset of retransmission for enhanced uplink dedicated channel - Google Patents

Abstract

According to the present invention, in a mobile communication system supporting a retransmission scheme, first channel data to be transmitted for a first channel and second channel data to be transmitted through a second channel are simultaneously present, and the second channel data is retransmitted. In the case of data, determining whether the total transmission power of the first channel and the second channel exceeds a predetermined maximum power, and if the total power exceeds the maximum power, the total power is the maximum power. It characterized in that it comprises a process of reducing the power of the second channel so as not to exceed.

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

Description

A method and apparatus for setting the power offset of retransmission for Enhanced uplink dedicated channel}

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 shows a method of setting the power of a transport channel 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 using an improved uplink uplink dedicated channel, and more particularly, to an efficient power setting method and apparatus in consideration of a hybrid automatic retransmission request (HARQ).

Enhanced Enhanced-Downlink Shared CHannel (hereinafter referred to as E-DCH) is referred to as Wideband Code Devision Multiple Access (WCDMA). It is a proposed channel. With the introduction of E-DCH, Adaptive Modulation and Coding (AMC), Hybrid Automatic Retransmission Request (HARQ) and base station (Node B) used in High Speed Downlink Packet Access (HSDPA). The use of control scheduling methods is 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 grasps the channel status of the terminals using the E-DCH, and performs scheduling appropriate for each terminal. That is, the Node B 100 allocates a low data rate to a far-distance terminal 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. Is scheduled in a manner that allocates a high data rate.

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 packet data to be used in the transport format resource indicator (TFRI), which is TF-related information, and the EUDCH, which is the E-DCH information, to the node B 201.

In step 213, the node B 201 determines whether there is an error in the received TF and E-DCH information. At this time, if there is any error, the node B 201 determines NACK. If there is no error, the node B 201 determines 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, when the terminal 202 receives the ACK information, new information is transmitted to the E-DCH, and when the terminal 202 receives the NACK information, the previous information is retransmitted.

The E-DCH as described above is expected to be transmitted through an Enhanced Dedicated Physical Data Channel (E-DPDCH) when using a code multiplexing scheme.

Hereinafter, a power setting part related to the present invention will be described in a method of transmitting an uplink channel in a general WCDMA system.

3 is a diagram illustrating a method of setting power of a transport channel in a WCDMA system.

As shown in FIG. 3, when data 316 including vidio telephony, uploaing of multimedia mails, games, etc. to be transmitted is generated, the mobile terminal 317 is assigned to each code assigned to the transport channels 318. The data is spread and transmitted to the base station 319.

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 coding chain 305. In addition, information necessary for demodulation of the data channel is also generated separately.

The control information and the encoded data are modulated in modulators 300 and 306, respectively. The modulated control information and data are spread through the channelization codes Cc and Cd in the spreaders 301 and 307, respectively, and then transmitted to the gain adjusters 302 and 308, respectively. The spread control information and data are multiplied by the gain coefficients β _c , β _d which are given to the corresponding channel in the gain controllers 301 and 308, respectively, and then multiplexed by the multiplexer 303. The multiplexed control information and data are input to the scrambling unit 304, scrambled with a dedicated scrambling code S _{dpch, n} , and then converted into RF signals through the RF unit 309 and transmitted to a wireless channel.

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

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

If the E-DCH is to be added in addition to the transmission channels defined in the conventional system, if only the TFC that satisfies the total allowable power level is selected through the TFC selection, the total power is the maximum transmission power as in the prior art. In case of exceeding, the gain coefficient of each channel may be adjusted equally. However, in the case of the E-DCH, if the power control scheme defined in the existing system is applied as it is due to the introduction of HARQ technology, a problem may occur. That is, in HARQ, when performing retransmission, 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 the case of the transmission power, in general, the transmission power at the time of retransmission is set at the same level as the initial transmission.

However, there may be a case where DCH data does not exist during initial transmission of E-DCH and DCH data occurs during retransmission. In addition, when the TTI of the E-DCH is set to be smaller than the minimum TTI of the DCH, it may occur that the E-DCH needs to be retransmitted in a situation where the TF and the transmission power of the DCH are fixed. In the above situation, if the UE uses the same power as the initial transmission for retransmission of the E-DCH, it is likely that the total transmission power will result in exceeding the maximum transmission power. In this situation, if the power ratio of each channel is reduced by the conventional power control method, transmission of all channels is possible within the maximum transmission power, but transmission quality of all channels cannot be guaranteed.

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

As shown, at the time T1, the UE initially transmits E-DCH data through the E-DPDCH. In this case, since there is no data of the DCH, the total power 401 does not exceed the maximum transmit power (Pmax) 407. However, at the time T2 when retransmission occurs, the DCH data is transmitted through the DPDCH, so that the total power exceeds Pmax 407. In this case, conventionally, the powers of the E-DPDCH, DPDCH, and DPCCH are adjusted at the same ratio. Therefore, the total power 404 at time T3 does not exceed the maximum power 407.

However, since all of the E-DPDCH, DPDCH and DPCCH are transmitted using less power than the T2 time point, the quality of each channel will be degraded at the receiving end. In particular, if the priorities of the DCH and the E-DCH are different, if all channels are always adjusted equally, the transmission quality of the DCH or the E-DCH may be degraded due to retransmission. For example, even if the DCH is a high-priority voice call, the re-transmission of the low-priority E-DCH causes DCH data to be transmitted through very low levels of power in some slots, resulting in poor voice call quality. Can be.

Therefore, when adding an E-DCH channel supported HARQ, a method for controlling the transmission power when the transmission power of the terminal exceeds the maximum allowed transmission power is required. In addition, there is a need for a method of more efficiently adjusting power when the total transmission power is greater than the maximum transmission power during retransmission.

Accordingly, an object of the present invention, which was devised to solve the problems of the prior art operating as described above, is that the terminal efficiently when the transmission power of the terminal exceeds the maximum transmission power when supporting a packet service through the reverse transmission channels. It is to provide a method and apparatus that can adjust the power.

The present invention provides a method and apparatus for adjusting the power of a specific transmission channel of a terminal when data of an E-DCH is retransmitted.

An object of the present invention is to provide a method and apparatus for differently reducing the power of a channel according to a situation or a priority of a channel when the data of the E-DCH is retransmission.

The method according to the embodiment of the present invention, which was devised to achieve the above object, has a plurality of data channels, and in a mobile communication system supporting a retransmission scheme,

When the first channel data to be transmitted for the first channel and the second channel data to be transmitted through the second channel exist at the same time, and the second channel data is retransmission data, the first channel and the second channel. Determining whether the total transmit power of exceeds a predetermined maximum power,

And if the total power exceeds the maximum power, reducing the power of the second channel so that the total power does not exceed the maximum power.

According to another embodiment of the present invention, in a mobile communication system in which a plurality of data channels exist and support a retransmission scheme,

When the first channel data to be transmitted for the first channel and the second channel data to be transmitted through the second channel exist, the priorities of the first and second channel data are compared and the first and second channels are compared. Setting the transmission format and transmission power for each channel of the channel data;

If the first channel data or the second channel data is retransmission data, the same transmission format as the initial transmission is selected for the retransmission data, and the total transmission powers of the first channel and the second channel are preset maximum powers. Characterized in that the transmission power of the retransmission data is set so as not to exceed.

According to an aspect of the present invention, there is provided an apparatus for power setting for reverse dedicated transmission channels including a first channel and a second channel in a mobile communication system having a plurality of data channels and supporting a retransmission scheme. ,

First channel data to be transmitted for the first channel, transmission formats of the first channel and the second channel according to the requirements of the data rate and transmission quality of the second channel to be transmitted for the second channel, and A transmission format selector for setting gain factors;

A retransmission controller for generating retransmission information indicating whether second channel data to be transmitted through the second channel is retransmission data;

And the physical channel transmission controller for resetting the gain coefficient of the second channel by using the retransmission information and the gain coefficients.

An apparatus according to another embodiment of the present invention is an apparatus for power setting for enhanced reverse dedicated transmission channels including a first channel and a second channel in a mobile communication system having a plurality of data channels and supporting a retransmission scheme. To

A retransmission controller generating retransmission information indicating whether second channel data to be transmitted through the second channel is retransmission data;

According to the priority of the first channel data and the second channel data, the transmission format combination of the first channel data and the transmission format of the second channel data are set, and the second channel data is set according to the retransmission information. And a transmission format selector for finally determining a transmission format and a gain factor.

According to another embodiment of the present invention, there is provided a method of transmitting data in a mobile communication system in which a plurality of data channels exist and each channel has a different priority in setting transmission power.

Determining transmission power for each channel;

Determining whether total power for transmitting the plurality of data channels exceeds a predetermined maximum allowable power;

If the total power exceeds the maximum power and the transmit power of the lowest priority channel cannot be reset such that the total power does not exceed the maximum power, the maximum allowable power is exceeded for each predetermined specific slot. And resetting all transmission powers of the data channels so as not to occur.

In another aspect of the present invention, an apparatus for transmitting data in a mobile communication system having a plurality of data channels, each channel having a different priority in setting transmission power,

Receives the estimated total power value for each predetermined slot, calculates a gain device that does not exceed the maximum allowable transmit power for each specific slot, and has all predictable total power values for the remaining slots except for the specific slot. A physical channel transmission controller for calculating a gain element and delivering the gain element to the power amplifier;

And receiving a transmit power control (TPC) request, the power amplifier controller setting a gain element corresponding to the received gain elements for the transmitted signal.

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.

According to the present invention, when DCH data is generated when the UE supporting the E-DCH retransmits packet data of the E-DCH, the total power exceeds the maximum power of the UE. To ensure the transmission quality. If both the E-DCH data and the DCH data exist, the UE checks whether the data of the E-DCH is retransmission. If the check result is retransmission, the gain coefficient of the specific channel is reset at the corresponding transmission time. In addition, in the case of non-retransmission, by reducing the total power without considering the priority, the gain coefficient for setting the power of a specific channel is reset at the corresponding transmission time in order to adjust the power equally between the channels. In addition, when transmitting a plurality of channels, the transmission power is checked in units of slots to reduce the transmission power step by step according to the priority of each channel. The method of setting the priority may be a channel for which retransmission is guaranteed or a control channel. Specifically, even when the maximum allowable power is exceeded, even when the E-DCH reduces power, a channel containing control information necessary for demodulation of the E-DCH should be transmitted while maintaining reliability. That is, the transmission power is kept constant for the E-DPCCH which is the control information channel. If the power of the E-DPDCH transmitting the E-DCH is reduced but still exceeds the maximum allowable power, scaling is performed while maintaining the same power ratio for the remaining channels.

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, the UE configured with the E-DCH at the time T1 initially transmits the E-DCH data through the E-DPDCH. In this case, since there is no data of the DCH, the total power 501 does not exceed the maximum transmit power (Pmax) 507. However, at the time T2 at which retransmission occurs, the total power 502 exceeds the maximum power 507 because the DCH data is transmitted over the DPDCH. At this time, when adjusting the transmission power of the E-DCH, only the power of the E-DPDCH is adjusted at the time T3. At the time T3, the total power does not exceed the maximum power 507 of the terminal, and the power level of the E-DPCCH / PDCH / DPCCH is kept the same as the previous T2 time. 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.

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.

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

First embodiment

In the first embodiment according to the present invention, the power factor of all channels is adjusted by recalculating gain coefficients of a specific channel whose total power does not exceed the maximum power in the upper layer of the physical layer.

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

At this time, the procedure has no meaning in determining whether the total power exceeds the maximum power and determining whether the E-DCH data is retransmission. Here, it will be described as a process of first determining whether the total power exceeds the maximum power.

Referring to FIG. 7, in step 601, a UE receives a transmission request for E-DPDCH / DPDCH / DPCCH / DPCCH data including respective gain coefficients. In step 602, the terminal receiving the transmission request predicts the total transmission power by using a gain factor of data to be transmitted. That is, the terminal typically measures the transmission power of the terminal to check the transmission power state every slot. Based on this, the terminal predicts the total power of the channel to be transmitted by using the given gain factors required for the next transmission.

In step 602, the terminal checks whether the total power Ptx exceeds a predetermined maximum 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 power exceeds the maximum power, in step 603, the UE determines whether data of the E-DCH 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. Alternatively, the transmission of one of the two data may be delayed according to the priority of DCH or E-DCH data, and the gain coefficient may be selected according to the conventional procedure for the data of the remaining channels, or the power for the data of the channel having high priority is first set. In step 606, the transmission power for the remaining channels is set so that the total power does not exceed the maximum power.

If the determination result indicates that the data of the E-DCH is retransmission, in step 605, the UE regains the gain factor of the E-DPDCH so that the total power does not exceed the maximum transmission 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 the above procedure, the terminal proceeds to step 606 to transmit the corresponding data to each channel using the gain coefficients of the re-established E-DPDCH and the gain coefficients of other channels.

The UE may perform the procedure of FIG. 7 by measuring power for each slot, but when the total power is exceeded due to retransmission of the E-DPDCH, it occurs only during one TTI. If the total power is momentarily increased by the power control and the transmit power continues to exceed the maximum power, all channels are equally adjusted in the usual way.

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

,

은 TFC 선택파트에 의해서 결정되어 물리 계층에 전달되는 E-DPCCH/E-DPDCH/DPCCH/DPDCH의 이득 계수들이고,

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

은

,

을 이용할 경우 예상되는 전체 전송 파워이고,

는 단말에게 허용되는 최대 전송 파워이다.here,

,

Are gain coefficients of E-DPCCH / E-DPDCH / DPCCH / DPDCH determined by the TFC selection part and delivered to the physical layer,

Is a new gain factor for the E-DPDCH that adjusts the total transmit power to not exceed the maximum power.

silver

,

Is the estimated total transmit power.

Is the maximum transmission power allowed for the terminal.

를 구하는 식이다. 상기 [수학식 1]을 통해서 얻은

는 상위에서 설정한

에 비해서 작게 된다. 즉, 이를 통해 단말은 최대 전송 파워를 초과하지 않는 최대 전송 파워를 이용하여 E-DPDCH의 전송할 수 있 게 된다. 상기 절차에서

값이 음의 값이거나 임의의 레벨보다 작은 경우에 단말은, 현재 시점에서 E-DCH 데이터의 재전송을 수행하지 않고 다음 HARQ시점에서 재전송을 시도할 수 있다. Equation (1) shows a new gain factor of the E-DPDCH by reducing the power of the E-DPDCH while keeping the transmission power of the DPDCH and DPCCH constant while reducing the power so that the total transmission power does not exceed the maximum power.

To obtain. Obtained through [Equation 1] above

Set in parent

It becomes smaller than that. That is, the UE can transmit the E-DPDCH using the maximum transmission power that does not exceed the maximum transmission power. In the above procedure

If the value is negative or less than any level, the UE may attempt to retransmit at the next HARQ time without performing retransmission of the E-DCH data at the present time.

In an environment in which the E-DPCCH information is transmitted only when the E-DPDCH is present, the E-DPCCH may not be transmitted unless retransmission is performed as described above. In addition, when the information on the power ratio of the E-DPDCH channel is necessary for the receiver structure of the base station scheduler, the terminal may signal information indicating that the power ratio is adjusted to the physical layer signaling to the base station.

In an E-DCH serving environment, the transmit power of the E-DCH is controlled through a gain factor set according to the TF. In addition, the transmission power adjusted by the gain factor can be adjusted as needed. For example, the control is performed to increase the transmission power according to the QoS of the E-DCH to be serviced. In this case, when the transmission power is increased, one bit information indicating the information on the increase of the transmission power is included in the E-DCH control channel and signaled. As another example, when the amount of E-DCH data to be transmitted is transmitted through the E-DCH, there is a method of controlling to increase the transmission power of the E-DCH. At this time, one bit information for notifying that the transmission power is increased is included in the E-DCH control channel and signaled.

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

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

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 is identifier information indicating a transmission format of the E-DCH transmitted to the corresponding TTI, and the power de-boosting indicator is an identifier for signaling this when the power of the E-DCH is reduced according to the first embodiment of the present invention. to be. The power boosting indicator is an identifier for notifying when the transmission power of the E-DCH is increased in consideration of QoS, and the MAC-e signaling indicator is used to reliably transmit the buffer status information when transmitting the buffer status information. When the transmission power of the DCH is increased, it is an identifier for informing this. NDI is an identifier for indicating that a packet is newly started as HARQ information. That is, the bits distinguished by the control information are allocated and used.

However, since the power de-boosting indicator, the power boosting indicator, and the MAC-e signaling indicator have a direct correlation with the increase / decrease of transmission power or normal transmission, a total of four types are used using 2-bit as shown in Table 2 below. You can signal the case.

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.

indication Information content 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.

indication Information content 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 β_e 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

,

With gain coefficients 705, it is responsible for resetting the gain coefficient β _e of the E-DCH according to the procedure of FIG.

When control information to be transmitted on the DCH and the E-DCH is received, the DPCCH generator 719 generates the control information into the DPCCH and DPDCH frames, and the coding block 720 encodes the DPCCH frame. The encoded control information is modulated via modulator 721, transmitted to spreader 708, spread through channelization code Cc, and then multiplied by gain vector β _c in gain regulator 722 and then multiplexer 723. Is sent to.

와 곱해진 후 다중화기(723)로 전송된다.When data to be transmitted on the DCH and the E-DCH are received, the E-DPDCH, the DPDCH, and the E-DPCCH generators 703, 714, and 726 transmit the data to the DCH according to the TFC information selected for each transmission format in the TFC selector 701. And an E-DCH frame, and each of the coding blocks 715, 709, and 727 encodes the DCH and E-DCH frames. The DPDCH data encoded in the coding block 715 is modulated by the modulator 716, transmitted to the spreader 717, spread through the channel discrimination code Cd, and then gain gain in the gain controller 718.

Multiplied by and then sent to multiplexer 723.

(707)로 조절되어 상기 다중화기 (723)로 전송된다. The E-DPDCH frame generated in the coding block 709 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 via modulator 711 and then spread through channel division code Ce at spreader 712 and reset at the physical channel transmitter 706 at gain adjuster 713.

707 is then 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:

Hereinafter, in the second embodiment of the present invention, when the E-DCH data is retransmitted, if the total transmission power exceeds the maximum power, the gain coefficient of the E-DCH is reduced by an offset to adjust the total power.

In the second embodiment of the present invention, when the maximum transmission power of the terminal exceeds the maximum power, it is calculated through the following Equation 2 to reduce by a value corresponding to a preset parameter.

는 상위 계층의 시그널링을 통해서 기지국에서 설정해줄 수 있다. here,

May be set in the base station 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 receives a transmission request for E-DPDCH / DPDCH / DPCCH data including respective gain coefficients. In step 622, the terminal receiving the transmission request estimates the total transmission power using the gain coefficients of the data to be transmitted. That is, the terminal typically measures the transmission power of the terminal to check the transmission power state every slot. Based on this, the terminal estimates the total power of the channels to be transmitted using the given gain factors required for the next transmission.

In step 622, the terminal checks whether the total power Ptx exceeds a predetermined maximum 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 power exceeds the maximum power, in step 623, the UE determines whether data of the E-DCH 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. Alternatively, the transmission of one of the two data may be delayed according to the priority of DCH or E-DCH data, and the gain coefficient may be selected according to the conventional procedure with respect to the data of the remaining channels, or the power for data of the high priority channel may be increased. First, after setting the transmission power for the remaining channels so that the total power does not exceed the maximum power, and proceeds to step 626.

If the determination result indicates that the data of the E-DCH is retransmission, in step 625, the UE regains the gain factor of the E-DPDCH so that the total power does not exceed the maximum transmission power and adjusts only the power of the E-DPDCH. At this time, the gain coefficient is calculated through the equation (2). After completing the above procedure, the terminal proceeds to step 626 to transmit the corresponding data to each channel using the set gain factor.

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.

,

인 게인벡터들(705)을 수신하여, 단말 의 최대 전송 파워인 Ptx.ori가 최대 파워 Pmax를 초과하는 경우, 미리 정해지는 옵셋에 따라 E-DCH의 이득 계수인

를 도 7의 절차를 수행하여 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 is from the parameter 704 and the TFC selector 701 which is Pmax, Ptx, ori for initial transmission and retransmission from the HARQ controller 726

,

In the case of receiving gain vectors 705 and the maximum transmit power Ptx.ori of the terminal exceeds the maximum power Pmax, the gain factor of the E-DCH according to a predetermined offset

Is obtained by performing the procedure of FIG.

If the total transmit power exceeds the maximum allowable power even after adjusting the power of the E-DPDCH by the offset, the total power is reduced while maintaining the power ratio between channels. In addition, when the information on the power ratio of the E-DPDCH channel is necessary for the receiver structure of the base station scheduler, the terminal may signal information indicating that the power ratio is adjusted to the 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 by using a 1-bit identifier or a 2-bit identifier as 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 power does not exceed the maximum 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.

First, a transmission environment will be described in order to assist in understanding the present embodiment. In the terminal according to the present embodiment, one DCH and one E-DCH are set at the same time, and a possible transmission format (TFC) of each channel is also set as shown in Tables 5 and 6 below. Since there is only one DCH, the TFC actually includes a TF set (TFS) composed of individual TFs, and the TF of the E-DCH is designated as an E-TF. As described below, TFs can transmit more data as the index value increases. Tables 1 and 2 show a case where it is assumed that the DCH and the E-DCH are transmitted through different physical channels. In case of transmission through 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 physical channels to which the DCH and the E-DCH are mapped are different, the total power available to the terminal is the sum of the transmission powers of all the channels, and thus the terminal sets the TFC that can be transmitted in consideration of the transmission powers of the two channels.

On the other hand, if there is E-DCH data to be retransmitted, the UE compares the E-TF during initial transmission with the newly selected E-TF and selects the same TF as the TF selected in the initial transmission. This is because the DCH may have a higher priority at the time of retransmission and thus may not be able to select an E-TF like the initial transmission. This may be caused by channel conditions or scheduling.

Accordingly, the terminal compares the E-TF of the initial transmission with the E-TF of the retransmission, and fully supports the TF of the initial transmission when the index of the E-TF of the initial transmission is less than or equal to the index of the retransmission E-TF. Since it is determined to be possible, the terminal selects an E-TF of the initial transmission and a gain factor corresponding thereto. As a result of the comparison, if the index of the E-TF of the initial transmission is larger than the index of the retransmission E-TF, the UE selects the same E-TF as the E-TF of the initial transmission, and selects a new gain factor adjusted for the first transmission. Choose.

[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

For example, 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 E-DCH, E-TF = 1 and gain factor = beta5 are selected. Finally, E-TF_new = 2 and gain factor = beta 5 are selected for the E-DCH upon 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 are present, the UE compares the priorities of the E-DCH and the DCH in step 805.

As a result of the comparison, if the priority of the DCH is high, in step 806, the UE first selects a TFC required for data transmission of the DCH, and proceeds to step 808 to predict power remaining after data transmission of the DCH to the E-DCH. Select the E-TF to transfer the data. Alternatively, the transmission of one of the two data, which is EK in the priority of the DCH or E-DCH data, is delayed, and after selecting TF according to the conventional procedure for the remaining channel data, the process proceeds to step 815.

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.

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 newly selected E-TF (TF_re).

 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 terminal selects a gain factor corresponding to the E-TF of the initial transmission in step 813. As a result of the comparison, if the E-TF (TF_initial) of the initial transmission is higher than the retransmission E-TF (TF_re), in step 814, the UE selects the same E-TF as the E-TF selected during the initial transmission, and retransmission E-TF Select the gain factor of (TF_re). 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.

Referring to FIG. 11, the TFC selector 901 determines the transport format of each transport channel. The TFC selector 901 receives the predicted total transmit power information (Ptx) 902 and the maximum transmit power information (Pmax) 903 and HARQ information 904 which is information related to retransmission through the HARQ controller 913. Receive The TFC selector 901 sets the TFC, E-TF, and gain coefficient information generated by performing the procedure of FIG. 10 to the gain controllers 925, 921, and 916.

와 곱해진 후 다중화기(927)로 전송된다.When control information to be transmitted is received, the DPCCH generator 922 generates a DPCCH frame with the control information, and the coding block 923 encodes the DPCCH frame. The encoded control information is modulated by the modulator 924 and transmitted to the spreader 925 to be spread through the channel division code Cc, and then in the gain regulator 926.

Multiplied by and then sent to multiplexer 927.

와 곱해진 후 다중화기(927)로 전송된다.When data to be transmitted on the DCH and the E-DCH are received, the DPDCH and the E-DPDCH generators 917 and 910 generate the DPDCH and E-DPDCH frames according to the TFC information selected for each transmission format by the TFC selector 901. Each of the coding blocks 918 and 917 encodes the DPDCH and E-DPDCH frames. The DPDCH data encoded in the coding block 918 is modulated by the modulator 919, transmitted to the spreader 920, spread through the channel classification code Cd, and then gain gains in the gain adjuster 921.

Multiplied by and then sent to multiplexer 927.

(907)로 조절되어 상기 다중화기 (927)로 전송된다. The encoded E-DPDCH frame generated at the coding block 911 is transmitted to the rate matcher 912. The rate matcher 912 rate matches the encoded E-DPDCH frame under the control of a HARQ controller 913. The rate matched data is modulated via modulator 914 and then spread through channel discrimination code Ce at spreader 915 and reset at the physical channel transmission controller 906 at gain adjuster 916.

907 is sent to the multiplexer 927.

The data transmitted 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 transmit power, the power of the E-DPDCH channel is preferentially reduced.

 In the first embodiment, if the method of re-calculating the gain coefficient of the E-DCH to satisfy the maximum allowable transmit power is performed for each slot, which is a power control unit, the total transmit power does not exceed the maximum allowable transmit power regardless of initial transmission or retransmission. If exceeded, it can be applied at any time.

FIG. 12 is a diagram illustrating an example in which a total transmission power exceeds a maximum allowable transmission power in slot units and adjusts only the power of an E-DPDCH transmitting an E-DCH when the transmission power is exceeded. In the case of the E-DPCCH, since the control information for demodulating the E-DPDCH is transmitted, reliability must be guaranteed. Therefore, the power of the E-DPCCH 800 has not been reduced.

Referring to FIG. 12, a transmit power control (TPC) command within a corresponding TTI continuously indicates power increase, thereby showing a case where the total transmit power exceeds the maximum allowable transmit power. In FIG. 12, when the transmission power of each channel is equally reduced, that is, corresponds to the first embodiment, and when the fourth embodiment of the present invention is applied, only the power of the E-DPDCH is adjusted. As in Example 4, it can be seen that if only the E-DPDCH is reduced, the remaining channels can maintain a constant level of power.

If the power of the E-DPDCH is reduced by more than a certain ratio, the operation of adjusting the power of the E-DPDCH may be repeated if the total transmission power exceeds the maximum allowable transmission power. At this time, when the transmission power of the E-DPDCH is 0, the E-DPDCH is not transmitted. Nevertheless, if the total transmit power exceeds the maximum allowable transmit power, the power is reduced while maintaining the power ratio for the remaining channels.

Hereinafter, a procedure of a terminal performed when retransmission in power control according to the fourth embodiment will be described in detail with reference to FIG. 13.

Referring to FIG. 13, in step 1301, the physical layer compares the total transmit power and the maximum allowable power when the transmission time of the E-DPDCH or DPDCH / DPCCH / E-DPCCH channel is reached for each TTI.

As a result of the comparison, if the total transmit power exceeds the maximum allowable transmit power, the process proceeds to step 1103 to obtain a gain factor of the E-DPDCH in which the total transmit power does not exceed the maximum allowable transmit power. The method of obtaining the gain coefficient may be obtained in the same manner as in Equation 1. After applying the newly created gain device, the process proceeds to step 1304. In step 1304, it is compared whether the total transmit power exceeds the maximum allowable power. If the total transmission power still exceeds the maximum transmission power, the process returns to step 1303. When the transmission power of the E-DPDCH is 0 and the transmission power continues to exceed the maximum transmission power even though the transmission power of the E-DPDCH is 0, the channel situation is not good, and thus, the terminal power is insufficient. Proceed to step 1305. In step 1305, the total power is reduced while maintaining the same power ratio for the remaining channels, E-DPCCH / DPDCH / DPCCH. Since the above process is performed for each slot, even if the E-DPDCH is not transmitted in the corresponding slot, the E-DPCCH needs to be transmitted and maintains reliability, thereby reducing power in the same way as other channels.

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

Here, it is assumed that the terminal transmits the DPDCH / DPCCH / E-DPDCH / E-DPCCH. DPCCH / DPDCH / E-DPCCH generators 1413, 1414, 1415, and 1416, coding blocks 1417, 1418, and 1419, which are parts corresponding to the components described with reference to FIGS. Fields 1422, 1423, 1424, 1425, diffusers 1426, 1427, 1428, 1429, gain regulators 1430, 1431, 1432, 1433, channel multiplexer 1434, scrambler 1435, etc. The description thereof will be omitted and only portions directly related to the fourth embodiment of the present invention will be described.

When the E-DCH data transmission starts, the TFC selector 1401 selects E-TFC information and inputs it to the physical channel transmission controller 1408, and the physical channel transmission controller 1408 matches the gain coefficient 1405 with the E-TFC. You will receive the values. The physical channel transmission controller 1408 also receives information about the maximum allowed transmission power 1405 from the HARQ transmission controller. The power amplifier 1412 amplifies the E-DCH data and transmits the radio over the antenna. The power amplifier controller 1409 controls the power amplifier 1409 according to a power control control command, and transmits the expected total power value to the physical channel transmission controller 1408. In this case, the physical channel transmission controller 1408 may reset the gain factor of each channel according to the procedure as shown in FIG. 13 using the expected total power value.

That is, in the fourth embodiment of the present invention, when re-calculating the gain factor of the E-DPDCH so as not to exceed the maximum allowable transmit power for each slot, P_est is not transmitted from the power amplifier controller 1409 each time, and P_est is transmitted for each specific slot. Receive and calculate the gain factor. In this case, since P_est is not known accurately in the remaining slots, the gain element is calculated and transferred to the power amplifier controller 1409 in anticipation of all possible P_est.

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 구하므로 UP을 수신하는 경우와 DOWN을 수신하는 경우에 모두 대해서

를 구한다. The UE receives P_est every second slot to calculate a gain factor, and the next slot calculates a gain factor as it is. In other words, the next slot has not yet received a TPC command, so it is possible to predict in advance which TPC request to receive.

So that both the case of receiving UP and the case of receiving DOWN

Obtain

를 계산하여 상기 파워 엠프 제어기(1409)로 넘겨주며 파워 엠프(1412)는 매 슬롯마다 수신한 TPC 요구를 바탕으로

를 선택하여 적용한다. Specifically, the physical channel transmission controller has three

Is calculated and passed to the power amplifier controller 1409, and the power amplifier 1412 based on the received TPC request in every slot.

Select to apply.

이 되므로 상기 수만큼의

를 얻게 된다. In general, in case of receiving P_est for each 'K' slot, the number of cases when calculating the gain factor is

Will be

You get

The reason for the above operation is that the terminal finishes the gain coefficient setting for each frame and sets the power for each slot in the power amplifier 1412 stage, the information between the physical layer controller and the power amplifier controller 1409 for each slot. This is because it may not be possible to implement the terminal.

Hereinafter, referring to FIG. 15, an apparatus in the case of implementing the method by setting the gain coefficient by receiving P_est for each specific slot of the terminal as described above will be described.

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

Here, it is assumed that the terminal transmits the DPDCH / DPCCH / E-DPDCH / E-DPCCH. DPCCH / DPDCH / E-DPCCH generators 1513, 1514, 1515, and 1516, coding blocks 1517, 1518, and 1519, and modulators corresponding to components described with reference to FIGS. 8 through 11 in the terminal. Fields 1522, 1523, 1524, 1525, diffusers 1526, 1527, 1528, 1529, gain regulators 1530, 1531, 1532, 1533, channel multiplexer 1534, scrambler 1535, etc. The description thereof will be omitted and only portions directly related to the fourth embodiment of the present invention will be described.

(1543)들을 계산하여 상기 파워 엠프 제어기(1509)로 전송한다. 가능한 경우의 모든 이득 소자값을 전달받은 상기 파어 엠프 제어기(1509)는 매 TPC 요구를 수신하여, 일치하는 이득 소자(

)를 상기 파워 엠프 (1512)로 전달하게 된다.When the E-DCH data transmission starts, the TFC selector 1501 selects the E-TFC information and inputs it to the physical channel transmission controller 1508, and the physical channel transmission controller 1508 obtains a gain factor 1505 corresponding to the E-TFC. You will receive the values. In addition, the physical channel transmission controller 1508 receives information about the maximum allowable transmission power 1505 from the HARQ transmission controller. The power amplifier 1512 amplifies the E-DCH data and transmits the radio over the antenna. The physical channel transmission controller 1508 obtains a gain device that does not exceed the maximum allowable transmit power by receiving P_est once per specific slot, predicts possible P_est for the remaining slots, and corresponds to all possible gain devices for all possible conditions.

1515 are calculated and sent to the power amplifier controller 1509. The power amplifier controller 1509, which has received all gain device values where possible, receives every TPC request and matches the corresponding gain device (

) Is transferred to 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, when the total transmit power of the UE exceeds the maximum allowable transmit power, the transmit power of the E-DPDCH is adjusted by resetting the gain coefficient or setting an offset value, and power adjustment is not performed on the remaining channels.

Although the transmission power of the E-DPDCH is set to 0, if the total transmission power of the UE exceeds the maximum allowable transmission power, the procedure performed in the E-DPDCH for the E-DPCCH is repeated, and for the remaining channels Do not perform power adjustment. At this time, since the E-DPCCH is necessary to demodulate the E-DPDCH, unlike the E-DPDCH, the E-DPCCH may not be adjusted to be below a preset power. Similarly, power adjustment is performed for the DPCCH and the DPDCH on the same basis as the E-DPCCH.

Sixth embodiment

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

In addition, although the transmission power of the E-DPDCH is reduced by the minimum TTI unit, when the total transmission power exceeds the maximum transmission power by the power control generated in the slot unit, while maintaining the power ratio between all transmission channels Reduce the transmit power so that the total transmit power does not exceed the maximum transmit power. In this case, the transport channel means DPDCH, DPCCH, E-DPCCH, etc., including the E-DPDCH.

Specifically, when the E-DPDCH is set to 2 ms or 10 ms TTI, and there is a DPDCH transmitted in 10 ms or more TTI, the total transmit power is determined by the 2 ms TTI unit which is the minimum TTI of the E-DPDCH. Check if it exceeds and adjust the power of E-DPDCH channel in 2ms increments. In addition, if there are 15 slots in the 10ms TTI and 3 slots in the 2ms TTI, after adjusting the transmission power of the E-DPDCH in units of 2ms, the overall transmission power is adjusted in consideration of power control in units of each slot. 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 operating as described in detail above, when packet service is performed through the E-DCH, the priority is low when the total transmission power exceeds the maximum transmission power when data transmitted through the existing DCH occurs during retransmission. By adjusting only the power of the channel, it is possible to guarantee the transmission quality of a channel having a high priority and to efficiently use the transmission power of the terminal.

Claims (41)

In a mobile communication system in which a plurality of data channels exist and support a retransmission scheme When the first channel data to be transmitted through the first channel and the second channel data to be transmitted through the second channel are present at the same time, and the second channel data is retransmission data, the first channel and the second channel. Determining whether the total transmit power of exceeds a predetermined maximum power, And if the total power exceeds the maximum power, reducing the power of the second channel such that the total power does not exceed the maximum power. 2. The method of claim 1, wherein if the first channel and second channel data are initial transmission data, the first and second channels are kept constant while the ratio between the first and second channels is maintained so that the total power does not exceed the maximum power. And the power between the second channels is reduced to the same level. According to claim 1, If the first channel and the second channel data is the initial transmission data, the priority of the first channel and the second channel data is determined by setting the power for the data of the channel of high priority first And setting transmit power for the remaining channels such that the total power does not exceed the maximum power. The method of claim 1, wherein if the first channel and the second channel data are initial transmission data, power of the first channel and the second channel data is first determined to determine the priority of the first channel and the second channel data. And postponing transmissions for the remaining channels so that the total power does not exceed the maximum power. The method of claim 1, wherein reducing the power of the second channel comprises: And reducing the transmission power of the second channel by a constant ratio such that the total power does not exceed the maximum power. The method of claim 1, wherein reducing the power of the second channel comprises: Reducing the gain factor of the second channel by a predetermined offset and reducing the power of the second channel using the reduced gain factor. 2. The method of claim 1, wherein the first channel is a reverse dedicated transport channel and the second channel is an enhanced reverse dedicated transport channel. In a mobile communication system in which a plurality of data channels exist and support a retransmission scheme When the first channel data to be transmitted through the first channel and the second channel data to be transmitted through the second channel exist, the priorities of the first and second channel data are compared, and the first and second channels are compared. Setting the transmission format and transmission power for each channel of the channel data; If the first channel data or the second channel data is retransmission data, the same transmission format as the initial transmission is selected for the retransmission data, and the total transmission power of the first channel and the second channel is set in advance to the maximum power. The transmission power of the retransmission data is set so as not to exceed 0. The method of claim 8, wherein the setting of the Wherein the transmission format and transmission power of a channel having a high priority are set first, and then the transmission format and transmission power of the remaining channels are set in consideration of the maximum power. The method of claim 8, wherein the setting of the The transmission format and transmission power of the channel data having high priority are set first, and the transmission for the remaining channels is delayed so that the total power does not exceed the maximum power. The method of claim 8, wherein the first channel is a reverse dedicated transport channel, and the second channel is an enhanced reverse dedicated transport channel. Determining the priority of data for each channel when the first channel data and the second channel data exist, and setting a transmission format and transmission power for each channel; It is determined whether retransmission data exists among the data transmitted through the first channel and the second channel. If a retransmission channel exists, the transmission format used for initial transmission is selected for the retransmission channel, and the total transmission power is preset. Setting the transmission power for the retransmission channel so as not to exceed the maximum power. An apparatus for power setting for reverse dedicated transmission channels including a first channel and a second channel in a mobile communication system having a plurality of data channels and supporting a retransmission scheme, First channel data to be transmitted through the first channel, transmission formats of the first channel and the second channel according to the requirements of the data rate and transmission quality of the second channel to be transmitted for the second channel; A transmission format selector for setting gain factors; A retransmission controller for generating retransmission information indicating whether second channel data to be transmitted through the second channel is retransmission data; And the physical channel transmission controller for resetting the gain coefficient of the second channel using the retransmission information and the gain coefficients. The method of claim 12, wherein the physical channel transmission controller, If the retransmission information is the second channel data is initial transmission data, power between the first and second channels is maintained while maintaining a constant ratio between the first and second channels so that the total power does not exceed the maximum power. Said device being reduced to the same level. The method of claim 12, wherein the physical channel transmission controller, If the first channel and the second channel data are initial transmission data, the power between the first and second channels while maintaining a constant ratio between the first and second channels so that the total power does not exceed the maximum power. Said device to reduce to the same level. The method of claim 12, wherein the physical channel transmission controller, If the first channel and the second channel data is initial transmission data, the priority of the first channel and the second channel data is determined, and the power for the data of the channel having the highest priority is first set, and the total power is Defer transmission on the remaining channels so as not to exceed the maximum power. The method of claim 12, wherein the physical channel transmission controller, And the gain coefficient of the second channel is decreased by a predetermined ratio such that the total power does not exceed the maximum power. The method of claim 12, wherein the physical channel transmission controller, And reducing the gain of the second channel by reducing the gain coefficient of the second channel by a predetermined offset and using the reduced gain coefficient. 13. The apparatus as claimed in claim 12, wherein the first channel is a reverse dedicated transport channel, and the second channel is an enhanced reverse dedicated transport channel. An apparatus for power setting for enhanced reverse dedicated transmission channels including a first channel and a second channel in a mobile communication system having a plurality of data channels and supporting a retransmission scheme, A retransmission controller generating retransmission information indicating whether second channel data to be transmitted through the second channel is retransmission data; According to the priority of the first channel data and the second channel data, a transmission format combination of the first channel data and a transmission format of the second channel data are set, and the second channel data is set according to the retransmission information. And a transmission format selector for finally determining a transmission format and a gain factor. The method of claim 18, wherein the transmission format selector, The transmission format and transmission power of the channel having the highest priority are set first, and the transmission format and transmission power of the remaining channels are set in consideration of the maximum power. The method of claim 18, wherein the transmission format selector, And a transmission format and a transmission power of high priority channel data are set first, and the transmission for the remaining channels is delayed so that the total power does not exceed the maximum power. The method of claim 18, Wherein the first channel is a reverse dedicated transport channel, and the second channel is an enhanced reverse dedicated transport channel. In a method of transmitting data in a mobile communication system in which a plurality of data channels exist and each channel has a different priority in setting transmission power, Determining transmission power for each channel; Determining whether the total transmission power for transmitting the plurality of data channels exceeds a predetermined maximum allowable power; If the total power exceeds the maximum power, the transmission power of the channel with the lowest priority is reset so that the total power does not exceed the maximum power, and even if the channel with the lowest priority is reset, the full power is the maximum power. If the power is exceeded, the transmission power is reset at an equal rate for the remaining channels. The method of claim 23, wherein the resetting process, And setting a low priority on a channel to which retransmission is permitted. The method of claim 23, wherein the resetting process, Setting a low priority on the data channel. A method of transmitting data in a mobile communication system in which a plurality of data channels exist and each channel has a different priority in setting transmission power, Determining transmission power for each channel; Determining whether the total transmission power for transmitting the plurality of data channels exceeds a predetermined maximum allowable power; If the total power exceeds the maximum power, the total power exceeds the maximum power even if the transmission power of the lowest priority channel is reset so that the total power does not exceed the maximum power. And resetting the transmission power. The method of claim 26, wherein the setting step, And setting a low priority on a channel to which retransmission is permitted. The method of claim 26, wherein the resetting process, Setting a low priority on the data channel. In a mobile communication system supporting a packet data service, a method of setting transmission power of a packet data channel may include Setting transmission power according to a gain value determined for each transmission format, and increasing / decreasing transmission power of the packet data channel according to a preset criterion; And transmitting control information on an increase / decrease of transmission power of the packet data channel to a physical control channel of the packet data channel. Here, the set criterion decreases the transmission power of the packet data channel when the total transmission power exceeds the maximum power, and increases the transmission power of the packet data channel when transmitting the state information of the packet data through the packet data channel. And increasing or decreasing the transmission power of the packet data channel according to the quality of service of the data. The method of claim 29, The control information decreases the transmission power of the packet data channel when the total transmission power exceeds the maximum power, and increases the transmission power of the packet data channel when transmitting state information of the packet data through the packet data channel. The method as claimed in claim 2, wherein the information comprises two bits each indicating a case in which transmission power of the packet data channel is increased or decreased in accordance with data quality of service. The method of claim 29, The packet data channel is an enhanced uplink dedicated channel. The method of claim 29, The packet data is transmitted on an enhanced uplink dedicated physical data channel, and the control information is transmitted on an enhanced uplink dedicated physical control channel. In a mobile communication system capable of transmitting a plurality of channels including a packet data channel at the same time, the method for transmitting the packet data channel, Determining transmission power for each channel; And transmitting each channel with the determined transmission power. Here, when the sum of the transmission powers of each channel is the total transmission power, in determining the transmission power of each channel, it is determined whether the total transmission power exceeds the maximum allowable power, and thus the total transmission power exceeds the maximum allowable power. If the transmission power of the packet data channel is adjusted only in the minimum transmission time interval (TTI) interval. The method of claim 33, wherein the determining of the transmission power for each channel comprises: The method as claimed in claim 1, wherein the total transmission power is additionally adjusted in units of slots in consideration of power control. The method of claim 33, The transmit power of the packet data channel is adjusted according to a gain factor. 34. The method of claim 33, wherein the packet data channel is an enhanced reverse dedicated data channel. The method of claim 33, wherein the minimum transmission time interval, The minimum transmission time period of the packet data channel. 34. The method as claimed in claim 33, wherein the minimum transmission time period is 2ms. In a method of transmitting data in a mobile communication system in which a plurality of data channels exist and each channel has a different priority in setting transmission power, Determining transmission power for each channel; Determining whether total power for transmitting the plurality of data channels exceeds a predetermined maximum allowable power; If the total power exceeds the maximum power and the transmit power of the lowest priority channel cannot be reset such that the total power does not exceed the maximum power, the maximum allowable power is exceeded for each predetermined specific slot. And resetting all transmission powers of the data channels so as not to. The method of claim 39, wherein the resetting process, And calculating a gain factor by receiving an expected total power value for each specific slot. In a device for transmitting data in a mobile communication system in which a plurality of data channels exist and each channel has a different priority in setting transmission power, Receives the estimated total power value for each predetermined slot, calculates a gain device that does not exceed the maximum allowable transmit power for each specific slot, and has all predictable total power values for the remaining slots except for the specific slot. A physical channel transmission controller for calculating a gain element and delivering the gain element to the power amplifier; And a power amplifier controller that, upon receiving a TPC request, sets a gain element for the transmitted signal that matches the received gain elements.

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