KR101015672B1 - Apparatus and Method for allocating OVSF codes and I/Q channels for reducing peak-to-average power ratio in transmitting data via enhanced up-link dedicated channels in WCDMA systems - Google Patents

Abstract

The present invention assumes a situation in which an enhanced uplink dedicated transport channel (hereinafter referred to as 'EUDCH') is used in a wideband code division multiple access (WCDMA) system. do.

Increase of Peak-to-Average Power Ratio (hereinafter referred to as 'PAPR') of uplink transmission signal when physical channels for EUDCH data transmission are additionally transmitted in addition to existing physical channels in the user terminal Is induced. The increase in PAPR depends on the Orthogonal Variable Spreading Factor (OVSF) code and the in-phase / quadrature-phase (I / Q) channel applied to the corresponding physical channels.

Accordingly, the present invention proposes an apparatus and method for allocating an optimal OVSF code and I / Q channel to EUDCH-related physical channels in order to minimize the increase of PAPR due to EUDCH.

WCDMA, EUDCH, Orthogonal Variable Spread Index (OVSF) code, Maximum Power to Average Power Ratio (PAPR)

Description

Method and apparatus for allocating orthogonal variable spreading codes and orthogonal phase channels for reducing maximum power-to-average power ratio when transmitting data through an improved uplink channel in an asynchronous mobile communication system {Apparatus and Method for allocating OVSF codes and I / Q channels for reducing peak-to-average power ratio in transmitting data via enhanced up-link dedicated channels in WCDMA systems}             

1 is a diagram illustrating a user terminal and a base station for performing uplink transmission.

2 is a diagram illustrating information transmitted and received between a user terminal and a base station to perform uplink transmission.

3 is a diagram illustrating a tree structure of a general orthogonal variable spread index code.

4 is a diagram illustrating a transmission structure of a user terminal according to an exemplary embodiment of the present invention.

5 is a view showing a result of comparing the PAPR of a plurality of physical channels in accordance with the present invention.

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The present invention relates to an asynchronous wideband code division multiple access (WCDMA) communication system, and includes an enhanced uplink dedicated transport channel (EUDCH). The present invention relates to a device and a method for minimizing an increase in peak-to-average power ratio (PAPR) of a transmission signal during data transmission.

That is, an optimum Orthogonal Variable Spreading Factor (OVSF) code and an in-phase / quadrature-phase (I / Q) channel allocation apparatus for uplink physical channels according to the EUDCH service And to a method.

Representative dedicated physical channels used for transmission of user signals in the uplink of a WCDMA system are currently referred to as dedicated physical data channels (DPDCHs) and dedicated physical control channels (hereinafter referred to as "dedicated physical control channels"). DPCCH '. The DPDCH is a data transmission channel through which user data such as voice and video are transmitted, and the DPCCH is a control information transmission channel on which information such as a pilot format for DPDCH demodulation and power control is carried.

In recent years, a technique of using EUDCH, which is an enhanced uplink data dedicated transmission channel, has been proposed to improve packet data transmission speed and efficiency in uplink. The present invention assumes a situation in which EUDCH is used in a WCDMA system.

1 is a diagram illustrating information transmitted and received between a user terminal and a base station to perform uplink transmission.

Referring to FIG. 1, the UEs 110, 112, 114, and 116 transmit the packet data at different transmission powers according to distances from the Node B 100. The UE 110 farthest from the Node B 100 transmits packet data at the transmit power 120 of the highest reverse channel, and the UE 114 nearest the Node B is the lowest reverse channel. The packet data is transmitted at a transmission power 124 of. The Node B 100 may schedule the data to be inversely proportional to the strength of the transmit power of the reverse channel in order to improve the performance of the mobile communication system. In other words, a small data rate is allocated to a UE having the highest transmit power of the reverse channel, and a high data rate is allocated to a UE having the lowest transmit power of the reverse channel.

2 is a diagram illustrating information transmitted and received between a user terminal and a base station to perform uplink transmission. That is, FIG. 2 illustrates a basic procedure required between the Node B 200 and the UE 202 for packet data transmission on the EUDCH.

Referring to FIG. 2, in step 210, an EUDCH is set between the Node B 200 and the UE 202. Step 210 includes a process of transmitting and receiving messages through a dedicated transport channel. In step 212, the UE 202 transmits information about a required data rate and information indicating an uplink channel condition to the Node B 200. Information indicating the uplink channel status includes an uplink transmission power transmitted by the UE 202 and a transmission power margin of the UE 203.

The Node B 200 receiving the uplink transmission power may estimate the downlink channel condition by comparing the uplink transmission power and the reception power. That is, if the difference between the uplink transmission power and the uplink reception power is small, the uplink channel situation is considered good, and if the difference between the transmission power and the reception power is large, the uplink channel condition is considered poor. When the UE transmits a transmission power margin to estimate an uplink channel situation, the Node B 200 estimates the uplink transmission power by subtracting the transmission power margin from the maximum possible transmission power of a known UE. can do. The Node B 200 uses the estimated channel condition of the UE 202 and the information about the data rate required by the UE 202 to maximize the maximum possible packet for the uplink packet channel of the UE 202. Determine the data rate.

The determined maximum possible data rate is notified to the UE 202 in step 214. The UE 202 determines a data rate of packet data to be transmitted within a range of the maximum possible data rate reported, and transmits the packet data to the Node B 200 at the determined data rate in step 216.

Here, the uplink physical channels supporting the EUDCH service are Dedicated Physical Data Channels (hereinafter referred to as DPDCHs), Dedicated Physical Control Channels (DPCCHs), and HSDPA. High Speed Dedicated Physical Control Channel (hereinafter referred to as HS-DPCCH) for services, and Enhanced Dedicated Physical Data Channel (E-DPDCH) for EUDCH services. And an Enhanced Dedicated Physical Control Channel (“E-DPCCH”) for the EUDCH service.

That is, in step 216, the UE 202 transmits the control channel E-DPCCH to inform the frame format and channel coding information of the E-DPDCH channel, and transmits packet data through the E-DPDCH. Here, the E-DPCCH may be used for transmission of uplink data rate, transmission power margin, etc. required by the UE 202 and pilot information required for demodulation of the E-DPDCH by the Node B 200. Can be used.

As described above, when additional physical channels are additionally transmitted in addition to the existing physical channels for EUDCH packet data transmission, that is, when the number of physical channels transmitted in the uplink is increased, according to the uplink transmission signal, There is a problem that the maximum power-to-average power ratio (PAPR) increases. In general, the PAPR increases as the number of physical channels transmitted simultaneously increases.

The increase in the PAPR is called a radio frequency (hereinafter referred to as 'RF') of the UE because it can increase the distortion of the transmission signal and the Adjacent Channel Leakage Power Ratio (ACLR) outside the allowed band. Power amplifiers require a power back-off that reduces the amplifier input power to avoid the problem.
In this case, when the UE performs the power backoff, the reception power decreases in the receiver of the Node B, resulting in an increase in the error rate of received data or a decrease in cell coverage.

Accordingly, the UE intends to use a scheme of time division and transmission on an existing physical channel such as DPDCH, rather than carrying the EUDCH on a separate physical channel to reduce the PAPR increase. However, as the time division and transmission of the EUDCH to the existing physical channel, there is a disadvantage that the implementation complexity increases.

In consideration of the above, the WCDMA system applies a method of multiplying the physical channels in an uplink by multiplying the OVSF codes satisfying orthogonality. Each physical channel multiplied by the OVSF code may be distinguished in Node B.

3 illustrates a tree structure of an orthogonal variable spreading index code generally used in a WCDMA system.

Referring to FIG. 3, the OVSF code may be simply generated from a calculation process from Equations 1 to 3 below.

As shown in FIG. 3, the OVSF codes have a feature that orthogonality is established between codes having the same Spreading Factor (hereinafter, referred to as 'SF'). Orthogonality is established between two codes having different SF values when a code having a large SF value cannot be generated from a code having a small SF value using Equation 3 above. This will be described by way of example.

That is, when SF = 4, C _{ch, 4,0} = (1,1,1,1) is orthogonal to C _{ch, 2,1} = (1, -1), but C _{ch, 2,0} Orthogonality does not hold with = (1,1).

As another example, comparing OVSF codes with SF = 256 and C _{ch, 2,0} = (1,1), codes having an index of 0 to 127 for OVSF codes are coded with C _{ch, 2,0} = (1 Since it is generated from (1), mutual orthogonality does not hold. That is, as a higher data transmission rate is required, a lower OVSF code is used. When transmitting a plurality of physical channels at the same time, an OVSF code must be allocated to establish orthogonality with each other.

Meanwhile, even though the two physical channels use the same OVSF code, if they are transmitted using the I and Q channels of the transmitter, the receiver can separate and demodulate the two physical channel signals without mutual interference. This is because the signals transmitted on the I channel and the Q channel are carried on a carrier having a phase difference of 90 degrees between each other.

As described above, the uplink PAPR increase depends on the number of physical channels transmitted simultaneously in the uplink, the power ratio between each physical channel, the OVSF code used for each physical channel, and the I / Q channel allocation of each physical channel. Different.

In this regard, when the EUDCH technology is applied to the WCDMA system, when the E-DPCCH and the E-DPDCH channel for EUDCH packet data transmission are simultaneously transmitted in addition to the uplink channels, the PAPR increases.

Therefore, in a mobile communication system supporting EUDCH, there is a need for an OVSF code and I / Q channel allocation capable of reducing the PAPR increase while maintaining orthogonality with existing DPCCH, DPDCH, and HS-DPCCH. That is, there is a need for a method for optimizing OVSF code and I / Q channel allocation for E-DPCCH and E-DPDCH according to supporting the EUDCH.

Accordingly, an aspect of the present invention is to provide a transmission apparatus and method for a user terminal for efficiently transmitting packet data through enhanced uplink in a mobile communication system.

The present invention also provides an apparatus and method for allocating an orthogonal variable spreading code and an I / Q channel for minimizing an increase in the maximum power-to-average power ratio of an uplink transmission signal in a mobile communication system supporting uplink.

The present invention also proposes an apparatus and method for allocating I / Q channels and OVSF codes of E-DPDCH and E-DPCCH to minimize the increase of PAPR according to the presence or absence of HS-DPCCH and the number of codes of DPDCH.

In order to achieve the above object of the present invention, the present invention provides a method for transmitting uplink packet data in a mobile communication system supporting enhanced uplink packet data transmission, wherein an orthogonal variable spread index (OVSF) code (256, 0) and Creating a Dedicated Physical Control Channel (DPCCH) using a Q channel, and when the spread index value of the _DPDCH is SF _DPDCH , the OVSF code (SF _DPDCH , SF _DPDCH / 4) and I channel When the Dedicated Physical Data Channel (DPDCH) is created by using the SDF, and the SF value of the OVSF code to be allocated to the E-DPCCH to support enhanced uplink packet data transmission is called SF _E-DPCCH . A process of generating an E-DPCCH using the OVSF code (SF _E-DPCCH , 1) and the I channel, and the SF value of the OVSF code to be allocated to the _E-DPDCH is SF _E-DPDCH , and the SF value SF _E-DPDCH. the four or more OVSF code _{(SF E-DPDCH, SF E} -DPDCH / 2) and Q Generating an E-DPDCH using null, configuring a complex symbol sequence by summing the generated I and Q channels, and then scrambling the complex symbol sequence, and performing an antenna operation on the scrambled complex symbol sequence. Characterized in that the process through the transmission.

In order to achieve the above object of the present invention, the present invention provides a method for transmitting uplink packet data in a mobile communication system supporting enhanced uplink packet data transmission, using a dedicated orthogonal variable spread index (OVSF) code. Creating a dedicated physical control channel for supporting high-speed forward packet services, and creating dedicated physical channels for enhanced uplink packet data transmission using an OVSF code not used by the physical channels; And forming a complex symbol sequence by summing the I and Q channel signals of the generated channels, and then scrambling the complex symbol sequence and transmitting the scrambled complex symbol sequence through an antenna. It is done.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.                     

The present invention proposes an OVSF code and an I / Q channel allocation method for minimizing PAPR increase of uplink transmission signals in supporting EUDCH data services in a WCDMA system.
That is, the present invention proposes an optimized OVSF code and I / Q channel allocation scheme when E-DPCCH, which is a control channel for EUDCH packet data transmission, and E-DPDCH, which is a data channel, are additionally transmitted to an existing physical channel.
In addition, to improve EUDCH data rate and minimize PAPR, we propose an OVSF code allocation and I / Q channel allocation scheme that minimizes PAPR while maintaining orthogonality with existing DPCCH, DPDCH, and HS-DPCCH. .

In the existing Rel-5 standard WCDMA standard specification, the OVSF code and I / Q channel allocation of the HS-DPCCH channel can lower the PAPR in consideration of the maximum number of DPDCHs that can be determined when establishing a radio link between the UE and Node B. Decided.

Accordingly, the OVSF code and I / Q channel allocation of the E-DPDCH and E-DPCCH proposed by the present invention take into account the Rel-5 physical channels such as the maximum number of DPDCHs that can be transmitted in the radio link and whether HS-DPCCH is transmitted. Decide by

Here, in the EUDCH service, as the E-DPDCH physical channel supports high data rate transmission, several channels may be simultaneously transmitted. On the other hand, the control physical channel E-DPCCH is generally expected to be sufficient for one channel transmission.

That is, the present invention intends to support EUDCH in consideration of backward compatibility with the existing WCDMA system in order to reduce PAPR increase of uplink transmission signals. The reason is that when the compatibility between the DPDCH and DPCCH standards is not maintained and the versions do not match between base stations, serious problems may occur in various cases such as initial call setup or handover.

In other words, DPDCH and DPCCH, which are the core of the uplink physical channels, maintain the existing Rel-5 WCDMA standard, while OVSF code and I optimized for minimizing PAPR increase for EUDCH-related physical channels. / Q channel allocation method.

First, in the method of allocating OVSF code and I / Q channel while maintaining full compatibility with existing Rel-5 WCDMA system, existing uplink channels such as DPCCH, DPDCH, HS-DPCCH, etc. It is assumed that OVSF code and I / Q channel allocation are performed as described above. In this situation, when E-DPCCH and E-DPDCH, which are physical channels for EUDCH packet data transmission, are additionally transmitted, an optimized OVSF code and I / Q channel allocation method are provided. Suggest.

Second, consider the case where the compatibility for the HS-DPCCH is partially violated while maintaining the compatibility for the existing DPDCH and the DPCCH. In the current Rel-5 WCDMA standard, when the maximum number of DPDCHs that can be transmitted is one, the HS-DPCCH is transmitted using OVSF codes 256 and 64 on the Q channel. In this case, since the E-DPDCH cannot use the OVSF code (4, 1) in the Q channel, the EUDCH maximum data rate is limited.

Accordingly, in order to solve this problem, the present invention uses the OVSF code (4,1) in the Q channel in the E-DPDCH, and in addition, the HS-DPCCH, E-DPCCH, E in a direction to lower the PAPR of the UE transmission signal. -Propose a code allocation rule of DPDCH.

Finally, the Rel-6 standard considers the case of EUDCH stand-alone transmission in which only the E-DPDCH is transmitted without any DPDCH transmission in the uplink. Accordingly, the present invention proposes the OVSF code and I / Q channel allocation rule of the HS-DPCCH in case of EUDCH stand-alone.

In the above-described methods, the I / Q channel and OVSF code allocation of the HS-DPCCH is determined according to the maximum number of DPDCH channels that can be transmitted, and the number of E-DPDCH channels does not affect the allocation rule of the HS-DPCCH. This is because the DPDCH is not a channel that is always transmitted, but a channel that is transmitted only when data exists in the EUDCH data buffer of the UE. Accordingly, it may be reasonable to determine the OVSF code and I / Q channel allocation rule of the HS-DPCCH in consideration of the DPDCH according to the current standard.

4 is a diagram illustrating a transmitter structure of a user terminal according to the present invention.

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１. DPCCH

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_C와 곱해진다. 상기

_C는 UE가 전송하는 데이터의 속도나 서비스 품질 요구 수준 등에 따라 네트워크에 의하여 설정되는 값이다.
상기 DPCCH 신호는 Q 채널을 통해 전송되는 다른 채널 신호들과 더해진 후에 스크램블링 코드 S_dpch,n과 곱해진 후, 송신펄스형성 필터와 RF 단을 거쳐서 안테나를 통하여 송신된다.According to the channel allocation rules of the existing Rel-99 and Rel-5 standards, the DPCCH is allocated to the Q channel using the OVSF code (256, 0). Here, (256,0) is the same as that indicated by the OVSF code c _{ch, 256,0} in FIG. 3. That is, in FIG. 4, the DPCCH is BPSK modulated and multiplied by the OVSF code c _{ch, 256,0} to spread the band and then transmit gain.

Multiplied by _C remind

_C is a value set by the network according to the speed of data transmitted by the UE or the quality of service requirement.
The DPCCH signal is added with other channel signals transmitted through the Q channel and then multiplied by the scrambling code S _{dpch, n} and then transmitted through an antenna through a transmission pulse forming filter and an RF terminal.

2. DPDCH

When the SF value of the _{DPDCH is} called SF _DPDCH , the _DPDCH is spread by OVSF codes (SF _DPDCH , SF _DPDCH / 4) in the I channel. In FIG. 4, c _d represents the OVSF code of the DPDCH. In addition, the present invention assumes that at most one DPDCH channel is transmitted when the physical channels related to the EUDCH service are transmitted simultaneously with the DPDCH.

3. HS-DPCCH

The HS-DPCCH also follows the existing Rel-5 standard and is transmitted only when HSDPA service is performed on the downlink. As shown in FIG. 4, when only one DPDCH is transmitted in the uplink, the HS-DPCCH is spread by OVSF codes 256 and 64 in the Q channel.

4. E-DPCCH
The E-DPCCH is a physical control channel for the EUDCH service. The uplink transmission power, the uplink transmission power margin, and the channel state information (Channel, that is information necessary for transmitting a buffer status of the UE or estimating an uplink channel situation) State Information: hereinafter referred to as 'CSI'. The E-DPCCH transmits a packet data transport format identifier (“E-TFRI”) for an EUDCH service transmitted through the E-DPDCH.

At this time, when the SF value of the _{E-DPCCH is} called SF _E-DPCCH , the E-DPCCH is spread by the OVSF code (SF _E-DPCCH , 1) in the I channel. Here, there are many degrees of freedom in allocating an OVSF code and an I / Q channel to the E-DPCCH. Or, considering the DPCCH transmitted using the OVSF code (256, 1) in the I channel, the E-DPCCH is to use the OVSF code (SF _E-DPCCH , 1) in the Q channel. Alternatively, when the DP-CH is not set and the HS-DPCCH is set, the E-DPCCH is allocated to the Q channel. At this time, the E-DPCCH is appropriate OVSF code (SF _E-DPCCH , 1) or (SF _E-DPCCH , SF _E-DPCCH / 8).
Alternatively, when the DPDCH is not set, the E-DPCCH can be allocated to the Q channel regardless of whether HS-DPCCH is set. In this case, the E-DPCCH is preferably an OVSF code (SF _E-DPCCH , 1) or (SF _E-DPCCH , SF _E-DPCCH / 8).

This rule is always applied regardless of whether the HS-DPCCH is transmitted or the number of channels of the E-DPDCH. In this case, possible values of the SF _E-DPCCH are 8, 16, 32, 64, 128, 128, 256, etc., and the SF _E-DPCCH value to be used is determined in consideration of the amount of information to be transmitted through the E-DPCCH. .

_E-DPCCH는 다른 물리 채널들의 경우와 마찬가지로 UE에서 전송되는 데이터의 속도나 서비스 품질 요구 수준 등에 따라 설정되는 값이다.On the other hand, when the DP-CH is not set and the HS-DPCCH is set to the I channel, even if the SF _E-DPCCH can be set to 256, the E-DPCCH cannot be assigned to (256, 1). Therefore, the E-DPCCH may be allocated to (SF _E-DPCCH , 2) to (SF _E-DPCCH , SF _E-DPCCH / 8) in the I channel. Because assigning the E-DPCCH to (SF _E-DPCCH , 2) to (SF _E-DPCCH , SF _E-DPCCH / 8) in the I channel for the E-DPCCH to achieve a low PAR value Because it is the most efficient. Here, the possible values of the SF _E-DPCCH are 32, 64, 128, 128, 256.
Referring to FIG. 4 with respect to the allocation of the E-DPCCH, an EUDCH transmission controller 402 transmits control information necessary for the Node B to receive the E-DPDCH through the E-DPCCH. Do this. In FIG. 4, c _{ch, SF, 1} represents an OVSF code of the E-DPCCH, and is multiplied by a transmission symbol to satisfy orthogonality with other physical channels. In addition, the transmission gain of the E-DPCCH

As in the case of other physical channels, the _E-DPCCH is a value set according to the rate of data transmitted from the UE or the quality of service requirement.

５. E-DPDCH

The E-DPDCH is a dedicated physical data channel for the EUDCH service and transmits EUDCH packet data using a data rate determined according to scheduling information notified from the Node B. The E-DPDCH supports not only BPSK but also QPSK and 8PSK to increase the data rate while maintaining the number of spreading codes transmitted simultaneously.
Referring again to FIG. 4, the E-DPDCH is an example in which two channels are simultaneously transmitted, such as E-DPDCH1 and E-DPDCH2. In this case, the number of E-DPDCH physical channels used may vary according to the transmission rate of EUDCH packet data. In addition, the EUDCH transmission control unit 402 determines the number and SF value of the E-DPDCH channels transmitted at the same time.
In other words, when the data transmission rate is low, the E-DPDCH may be spread over an OVSF code having a relatively large SF value and transmitted on one E-DPDCH. On the other hand, when the data rate is high, the SF _E-DPDCH value is determined to be 4 or 2, and then EUDCH packet data is transmitted through one or two E-DPDCH channels.
That is, the EUDCH packet transmitter 404 transmits EUDCH transmission data through the E-DPDCH1 under the control of the EUDCH transmission controller 402. Or, if necessary, allocate and transmit up to E-DPDCH2. The EUDCH data buffer 400 is a buffer that stores EUDCH data to be transmitted. In this case, EUDCH data to be transmitted through the E-DPDCH channels is transmitted to an EUDCH packet transmitter 404 under the control of the EUDCH transmission control unit 402.

Hereinafter, a plurality of embodiments to be described below are methods of allocating an OVSF code and an I / Q channel with respect to the E-DPDCH.
First embodiment
The following first embodiment proposes various methods for OVSF code and I / Q channel allocation for the E-DPDCH without considering the DPDCH. In this method, the PAPR can be reduced by appropriately adjusting the minimum spreading gain value of the E-DPDCH and the number of transmission channels according to the EUDCH data rate. Here, the description will be made separately from the method A, the method B, and the method C in consideration of the SF _E-DPDCH set in relation to the data rate for better understanding of the description.
First, the method A is a case where the SF _E-DPDCH of the _E-DPDCH is set to 4 or more.

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1. when one E-DPDCH channel is transmitted;

The E-DPDCH1 transmits an EUDCH transmission symbol using an OVSF code (SF _E-DPDCH , SF _E-DPDCH / 2) through the Q channel. At this time, the SF _E-DPDCH may use 4, 8, 16, 32, 64, 128, 256. In FIG. 4, c _ed1 represents an OVSF code used for the E-DPDCH1. The E-DPDCH1 assigned the OVSF code as described above satisfies the orthogonality with other physical channels. That is, in response to the DPDCH transmitted on the I channel, the E-DPDCH1 may be transmitted on the Q channel to lower the PAPR.

2. when two E-DPDCH channels are transmitted;

1,

1)의 네 가지 가능한 조합으로 전송되게 되고, 8PSK가 적용되는 경우에는 (

,0), (0,

), (

1,

1)의 여덟 가지의 가능한 조합으로 전송되게 된다. When the SF _E-DPDCH of the E-DPDCH1 and the E-DPDCH2 is 4, the E-DPDCH1 and the E-DPDCH2 are spread through the Q channel and the I channel to the OVSF codes (4, 2), and transmitted simultaneously. That is, E-DPDCH1 is allocated to the Q channel and E-DPDCH2 is allocated to the I channel. In this case, the EUDCH packet data is transmitted in a fourth order or higher modulation scheme such as QPSK, 8PSK, and 16QAM.
For example, when QPSK modulation is applied, symbols transmitted through E-DPDCH1 and E-DPDCH2 are (

One,

Four possible combinations of 1), and if 8PSK is applied (

, 0), (0,

), (

One,

The eight possible combinations of 1) will be transmitted.

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In this case, when the SF _E-DPDCH is set to 4 and the desired EUDCH data rate cannot be achieved even when two channels of E-DPDCH1 and E-DPDCH2 are simultaneously transmitted, the SF _E-DPDCH is set to 2. Enables transmission at high data rates.

On the other hand, when the SF _E-DPDCH of the E-DPDCH1 and the E-DPDCH2 is 2, the E-DPDCH1 is spread on the Q channel and the E-DPDCH2 is spread on the I channel to the OVSF code (2, 1) and simultaneously transmitted.

As such, when multiple E-DPDCH physical channel transmissions are required, by setting the minimum spreading gain of the E-DPDCH to 2, by reducing the number of E-DPDCH channels transmitted by half compared to the case where the minimum spreading gain is 4, PAPR can be significantly lowered.

Method B is similar to method A described above, but allocates OVSF codes by enabling the use of SF _E- DPDCH at least 2 when only E-DPDCH1 is transmitted.

1. when one E-DPDCH channel is transmitted;

When only E-DPDCH1 is transmitted, the SF _E-DPDCH is 2, 4, 8, 16, 32, 64, 128, 256 and the like. At this time, the E-DPDCH1 is allocated to the Q channel with an OVSF code (SF _E-DPDCH , SF _E-DPDCH / 2).

2. when two E-DPDCH channels are transmitted;

E-DPDCH1 is spread in the Q channel and E-DPDCH2 is spread in the OVSF code (2, 1) in the I channel and transmitted simultaneously. In this case, EUDCH packet data can be transmitted by a fourth order modulation method such as QPSK, 8PSK, 16QAM, or the like.

The method C is similar to the above-mentioned method A, but when the two E-DPDCH1 and E-DPDCH2 channels are simultaneously transmitted with the SF _E-DPDCH as 4, the E-CHD data rate cannot be achieved. SF _E-DPDCH of the DPDCH1 is set to 2 and SF _E-DPDCH for E-DPDCH2 is set to 4 and assigns the OVSF code.

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1. when one E-DPDCH channel is transmitted;

If the SF _E-DPDCH of the _E-DPDCH is 4 or more, EUDCH transmission symbols are transmitted on the Q channel using the OVSF code (SF _E-DPDCH , SF _E-DPDCH / 2). At this time, the usable SF _E-DPDCH is 4, 8, 16, 32, 64, 128, 256.

2. when two E-DPDCH channels are transmitted;

If the SF _E-DPDCH of the E-DPDCH1 and the E-DPDCH2 is 4, the E-DPDCH1 and the E-DPDCH2 are spread through the Q channel and the I channel to the OVSF codes (4, 2) and transmitted simultaneously. In this case, the same method as in the case where only a channel is transmitted is applied. At this time, if two channels of E-DPDCH1 and E-DPDCH2 are simultaneously transmitted and the desired EUDCH data rate cannot be achieved, the SF _E-DPDCHs of the E-DPDCH1 and E-DPDCH2 are set to different values.
That is, the SF _E-DPDCH of the E-DPDCH1 is set to 2, and the SF _E-DPDCH of the E-DPDCH2 is set to 4 so that data carried on each channel is independently applied to the BPSK modulation. Therefore, the symbols transmitted in the E-DPDCH1 and the E-DPDCH2 are spread and transmitted to the OVSF codes (2, 1) and (4, 2) in the Q channel and the I channel, respectively.

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Further, when set as described above can not achieve a data rate, the _E-DPDCH1 SF _E-DPDCH is in sets of 2, E-DPDCH2 the SF _E-DPDCH and transmits the set to two.

That is, the E-DPDCH2 and the E-DPDCH1 are spread by the OVSF codes (2, 1) in the I and Q channels, respectively, and transmitted simultaneously. In this case, the EUDCH packet data can be transmitted in a fourth or higher modulation scheme such as QPSK, 8PSK, 16QAM, or the like.

On the other hand, the method D uses the OVSF code to increase the EUDCH packet data rate when using the OVSF code generated from the OVSF code (4, 0) even if the DPDCH and HS-DPCCH are not transmitted or the HS-DPCCH is transmitted. (4, 1) is additionally allocated to the E-DPDCH. This is because the HS-DPCCH is transmitted only during the HSDPA service.
In the case of DPDCH, when there is no data to be transmitted through DPDCH, it is sometimes used only for transmission of signaling information and may not be transmitted at other times. In addition, in the WCDMA standard specification after Rel-5, there may be a case where only the E-DPDCH is set without the DPDCH being set.

1. When two or less E-DPDCH channels are transmitted;
The above-mentioned method A, method B, or method C can be applied.

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2. when three E-DPDCH channels are transmitted;

If the HS-DPCCH is not transmitted, the E-DPDCH3 channel is transmitted using the OVSF codes (4, 1) on the Q channel.

Alternatively, when the HS-DPCCH is transmitted and the DPDCH is not transmitted, the E-DPDCH3 channel is transmitted using the OVSF codes (4, 1) on the I channel.

3. When four or more E-DPDCH channels are transmitted

Transmit using OVSF codes (4, 1) on both I and Q channels. This applies when the OVSF codes (4, 1) are not used by DPDCH and HS-DPCCH.

In other words, when neither HS-DPCCH and DPDCH are transmitted, the third E-DPDCH channel and the fourth E-DPDCH channel are transmitted using the OVSF codes (4, 1) on the I channel and the Q channel, respectively. Further, even when the DPDCH is not set and the HS-DPCCH is transmitted using the OVSF code generated from the OVSF code (4, 0), since the OVSF code (4, 1) is not used at all in the I channel and the Q channel, Using the OVSF codes (4, 1), the third and fourth E-DPDCH channels can be transmitted on the I and Q channels.

Second embodiment
The following second embodiment proposes methods of differently applying an OVSF code and an I / Q channel allocation rule for the E-DPDCH in consideration of whether HS-DPCCH is configured. According to the second embodiment, when the HS-DPCCH is set to the OVSF code (256, 64) in the Q channel, an E-DPDCH is allocated from the I channel to reduce the PAPR. This second embodiment has the advantage that the PAPR can be significantly lowered when the mobile station is located near the cell boundary and the HS-DPCCH has a relatively higher power than the DPDCH.

First, when the HS-DPCCH is not configured, the OVSF code allocation method is as follows.

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1. when one E-DPDCH is transmitted;

The E-DPDCH uses OVSF codes (SF _E-DPDCH , SF _E-DPDCH / 4) in the Q channel and transmits EUDCH transmission symbols. At this time, the SF _E-DPDCH has a value of 4, 8, 16, 32, 64, 128, 256, 512 and the like.
And if the EUDCH data rate cannot be sufficiently achieved even using the SF _E-DPDCH = 4, the SF _E-DPDCH instead of the OVSF codes (SF _E-DPDCH , SF _E-DPDCH / 4) of the _E-DPDCH. Set to 2 to use the OVSF code (2, 1) on the Q channel.

2. when two E-DPDCHs are transmitted;

If the SF _E-DPDCH of the _E-DPDCH is set to 2, the E-DPDCH1 is transmitted using the OVSF code (2, 1) in the Q channel, and the E-DPDCH2 is assigned the OVSF code (2, 1) in the I channel. Is sent using.

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Alternatively, the E-DPDCH1 is transmitted using the OVSF codes (2, 1) in the Q channel, and the E-DPDCH2 is transmitted using the OVSF codes (4, 2) in the I channel. At this time, if the desired EUDCH data rate cannot be achieved, the SF _E-DPDCH of the E-DPDCH2 is set to 2 so that the E-DPDCH2 replaces the OVSF codes (2, 1) instead of the OVSF codes (4, 2). Are sent using.

3. When three E-DPDCHs are transmitted;

When E-DPDCH1 is transmitted using the OVSF code (2, 1) on the Q channel, and E-DPDCH2 is transmitted using the OVSF code (2, 1) on the I channel, the E-DPDCH3 is transmitted on the Q channel. Transmit using (4, 1).

4. When four E-DPDCHs are transmitted
E-DPDCH4 is transmitted using the OVSF code (4, 1) on the I channel.

Here, the use of the OVSF codes (4, 1) in both the I and Q channels corresponds to the case where the OVSF codes (4, 1) are not used by the DPDCH and the HS-DPCCH. That is, when the DPDCH is not set or when the DPDCH and the E-DPDCH have the same radio frame length even when the DPDCH is set, a transmission time interval (hereinafter, referred to as 'TTI') is not transmitted. In addition to the E-DPDCH1, E-DPDCH2, and E-DPDCH3 channels, the E-DPDCH4 is transmitted in the I channel using the OVSF code (4, 1).

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On the other hand, when the HS-DPCCH is set to (Q, 256, 64), the OVSF code allocation method is as follows.
1. when one E-DPDCH is transmitted;
The E-DPDCH1 transmits an EUDCH transmission symbol using an OVSF code (SF _E-DPDCH , SF _E-DPDCH / 2) in an I channel. At this time, the SF _E-DPDCH has a value of 2, 4, 8, 16, 32, 64, 128, 256, 512 and the like.
2. when two E-DPDCHs are transmitted;
E-DPDCH1 is transmitted in OVSF code (2, 1) on I channel and at the same time E-DPDCH2 is transmitted using OVSF code (2, 1) in Q channel.
Third embodiment
The third embodiment uses the same OVSF code allocation method as the second embodiment when the HS-DPCCH is not configured. However, instead of the I channel where the HS-DPCCH is set to (Q, 256, 64), the E-DPDCH is allocated from the Q channel.
First, when the HS-DPCCH is not set, the same OVSF code allocation method as that of the second embodiment is applied. On the other hand, when the HS-DPCCH is set to (Q, 256, 64), the following OVSF code allocation method is applied.

1. when one E-DPDCH is transmitted;

E-DPDCH1 uses (SF _E-DPDCH , SF _E-DPDCH / 2) in Q channel, and SF _E-DPDCH is available in 2, 4, 8, 16, 32, 64, 128, 256, 512, etc. .

2. when two E-DPDCHs are transmitted;
If the SF _E-DPDCH of the _E-DPDCH is set to 2, the E-DPDCH1 is transmitted using the OVSF code (2, 1) in the Q channel, and the E-DPDCH2 is assigned the OVSF code (2, 1) in the I channel. Are sent using.
Alternatively, the E-DPDCH1 is transmitted using the OVSF codes (2, 1) in the Q channel, and the E-DPDCH2 is transmitted using the OVSF codes (4, 2) in the I channel. At this time, if the desired EUDCH data rate cannot be achieved, the SF _E-DPDCH of the E-DPDCH2 is set to 2 and transmitted using the OVSF codes (2, 1) instead of the OVSF codes (4, 2).

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3. When three E-DPDCHs are transmitted;

When the DPDCH is not set or the frame lengths of the DPDCH and the E-DPDCH are the same even though the DPDCH is set, transmission is performed using the OVSF code (2, 1) on the I and Q channels in the TTI where the DPDCH is not transmitted on the I channel. In addition to E-DPDCH1 and E-DPDCH2, the E-DPDCH3 is transmitted using the OVSF codes (4, 1) in the Q channel.
Fourth embodiment

In the following fourth embodiment, with respect to the case where the HS-DPCCH is set to the OVSF codes 256 and 64 in the Q channel, when the DPDCH is not set or the frame lengths of the E-DPDCH and the DPDCH are the same. In this paper, we propose a method to lower PAPR and use OVSF code efficiently.

The I / Q channel and OVSF code allocation method used for the E-DPDCH depends on whether the DPDCH is transmitted in the current TTI.
1. when one E-DPDCH is transmitted;
When DPDCH is currently transmitted in TTI, E-DPDCH1 uses (SF _E-DPDCH , SF _E-DPDCH / 2) in Q channel, and SF _E-DPDCH is 2, 4, 8, 16, 32, 64, 128, 256, 512, etc. are possible.

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On the other hand, if the DPDCH is not currently transmitted in the TTI, OVSF codes (SF _E-DPDCH , SF _E-DPDCH / 4) are used in the I channel, and the SF _E-DPDCH is 4, 8, 16, 32, 64, 128, 256, 512 and so on. In this case, if it is necessary to further increase the EUDCH data rate, the E-DPDCH is transmitted using the OVSF codes (2, 1) instead of the OVSF codes (SF _E-DPDCH , SF _E-DPDCH / 4).

2. when two E-DPDCHs are transmitted;
If the SF _E-DPDCH of the _E-DPDCH is set to 2, the E-DPDCH1 is transmitted using the OVSF code (2, 1) in the Q channel, and the E-DPDCH2 is assigned the OVSF code (2, 1) in the I channel. Is sent using.
Alternatively, the E-DPDCH1 is transmitted using the OVSF codes (2, 1) in the Q channel, and the E-DPDCH2 is transmitted using the OVSF codes (4, 2) in the I channel. At this time, if the desired EUDCH data rate cannot be achieved, the SF _E-DPDCH of the E-DPDCH2 is set to 2 and transmitted using the OVSF codes (2, 1) instead of the OVSF codes (4, 2).

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3. When three E-DPDCHs are transmitted;

In addition to E-DPDCH1 and E-DPDCH2 transmitted using the OVSF codes (2, 1) on the Q and I channels, the OVSF code (4, 1) is used on the I channel if no DPDCH is currently transmitted on the TTI. Transmit the E-DPDCH.
Fifth Embodiment

In the fifth embodiment, a method of allocating an E-DPDCH when a DPDCH is not configured is proposed. In this case, the E-DPDCH has a basic concept of allocating E-DPDCH1 to an I / Q channel opposite to the I / Q channel through which the HS-DPDCH is transmitted. Can lower PAPR.

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First, the E-DPDCH allocation method when the HS-DPCCH is not set is as follows.

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1. when one E-DPDCH is transmitted;

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E-DPDCH1 transmits an EUDCH transmission symbol using an OVSF code (SF _E-DPDCH , SF _E-DPDCH / 4) in an I channel. At this time, the SF _E-DPDCH has a value of 4, 8, 16, 32, 64, 128, 256, 512 and the like. At this time, if you can not even achieve a sufficient EUDCH data rate by setting the SF _E-DPDCH 4, and by setting the SF _E-DPDCH 2 instead OVSF code _{(SF E-DPDCH, SF E} -DPDCH / 4) Transmit EUDCH transmit symbol using OVSF code (2, 1) on I channel.

2. when two E-DPDCHs are transmitted;

E-DPDCH1 is transmitted in OVSF code (2, 1) on I channel, and E-DPDCH2 is transmitted using OVSF code (2, 1) in Q channel.

3. When three or more E-DPDCHs are transmitted;

In addition to the E-DPDCH1 and E-DPDCH2, E-DPDCH3 and E-DPDCH4 are additionally transmitted using OVSF codes (4, 1) in the I channel and the Q channel.

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On the other hand, when the DP-CH is not set and the HS-DPCCH is set, it is likely that the HS-DPCCH is allocated to the I channel.

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1. when one E-DPDCH is transmitted;

The E-DPDCH transmits EUDCH transmission symbols using OVSF codes (SF _E-DPDCH , SF _E-DPDCH / 4) in the Q channel. At this time, the SF _E-DPDCH has a value of 4, 8, 16, 32, 64, 128, 256, 512 and the like.
If sufficient EUDCH data rate cannot be achieved even using SF _E-DPDCH = 4, the OVSF codes (2, 1) are used in the Q channel by setting the SF _E-DPDCH to 2.

2. when two E-DPDCHs are transmitted;

E-DPDCH1 is transmitted with OVSF codes (2, 1) in the Q channel, and E-DPDCH2 is transmitted with E-DPDCH2 using OVSF codes (2, 1) in the I channel.

3. When three or more E-DPDCHs are transmitted;

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In addition to E-DPDCH1 and E-DPDCH2 transmitted using the OVSF codes (2, 1) on the Q and I channels, E-DPDCH3 and E-DPDCH4 on the Q and I channels have the OVSF codes (4, 1). Is additionally transmitted.

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Referring to FIG. 4, the EUDCH transmission controller 402 transmits a data buffer state, CSI, etc. of a UE necessary for Node B control scheduling to the Node B through an E-DPCCH. The EUDCH transmission control unit 402 determines the E-TFRI and transmits the determined E-TFRI to the Node B through the E-DPCCH. Here, the E-TFRI is determined using the maximum data rate that can be transmitted.

The EUDCH packet transmitter 404 receives the packet data to be transmitted by the determined E-TFRI from the EUDCH data buffer 400. The EUDCH packet transmitter 404 performs channel coding and modulation on the received packet data using the E-TFRI, and according to an example of the present invention, a node through the E-DPDCH 1 and E-DPDCH 2 channels. Send to B.

_d과 곱해진다. 상기 채널이득

_d과 곱해진 상기 DPDCH의 데이터는 합산기(426)로 입력된다. For example, the data of the DPDCH is spread at the chip rate using the OVSF code c _d in the multiplier 422 and the channel gain in the multiplier 424.

multiplied by _d Channel gain

The data of the DPDCH multiplied by _d is input to summer 426.

_ec과 곱해진다. 상기 채널이득

_ec과 곱해진 상기 E-DPCCH의 제어정보는 합산기(426)로 입력된다. Meanwhile, in order to maintain orthogonality with other physical channels in the multiplier 406, the control information of the _E-DPCCH is spread at a chip rate using the OVSF code c _{ch, SF, 1,} that is, (SF _E-DPCCH , 1). do. Then, channel gain in multiplier 408

multiplied by _ec Channel gain

The control information of the E-DPCCH multiplied by _ec is input to the summer 426.

_ed2과 곱해진다. 상기 합산기(426)는 입력된 상기 DPDCH의 데이터와 상기 E-DPCCH의 제어정보와, E-DPDCH2를 합산한 후 I 채널을 구성한다.The packet data transferred from the EUDCH packet transmitter 404 is converted into a complex symbol stream of I + jQ and then transmitted to the multiplier 446 and the multiplier 416 as I / Q channel components. The multiplier 446 spreads the packet data at chip rate by OVSF code C _ed2 into the I channel component of the modulation symbol. The output of multiplier 446 is channel gained at multiplier 448.

multiplied by _ed2 The summer 426 adds the input data of the DPDCH, control information of the E-DPCCH, and E-DPDCH2 to form an I channel.

_c과 곱해진다. 상기 채널이득

_c과 곱해진 상기 DPCCH의 제어정보는 합산기(436)로 입력된다. The control information of the DPCCH is spread at a chip rate using the OVSF codes 256 and 0, that is, c _ch, 256, 0 in the multiplier 428, and channel gain in the multiplier 430.

multiplied by _c Channel gain

The control information of the DPCCH multiplied by _c is input to a summer 436.

_hs과 곱해진다. The control information of the HS-DPCCH is spread at the chip rate using the OVSF codes 256 and 64, that is, c _ch, 256 and 64 in the multiplier 432, and the channel gain in the multiplier 434.

multiplied by _hs

_ed1과 곱해진다. 상기 합산기(436)는 입력된 상기 DPCCH의 제어정보와 상기 HS-DPCCH의 제어정보와, 상기 E-DPDCH1의 데이터를 합산한 후 Q 채널을 구성하게 된다. 상기 합산기(436)의 출력은 곱셈기(438)에서 허수를 곱한 후, 합산기(440)로 전달된다. In addition, the Q channel component of the EUDCH packet data modulation symbol transmitted from the EUDCH packet transmitter 404 is spread at the chip rate by the OVSF code C _ed1 in the multiplier 416. The output of the multiplier 416 is channel gain at multiplier 418

multiplied by _ed1 The summer 436 combines the input control information of the DPCCH, the control information of the HS-DPCCH, and the data of the E-DPDCH1 to form a Q channel. The output of summer 436 is multiplied by imaginary number in multiplier 438 and then passed to summer 440.

The summer 440 receives the sum of the outputs of the summer 426, adds the complex symbols to form a complex symbol string, and then transfers the complex symbol string to the multiplier 450. The multiplier 450 scrambles the transmitted complex symbol string using a scrambling code S _{dpch, 1} . The scrambled complex symbol string is converted into pulse form by the pulse generator 452 and then transmitted to the Node B through the antenna 456 via the RF 454.

FIG. 5 is a diagram illustrating the PAPR reduction effect illustrated in FIG. 4 in consideration of an example of physical channel configuration.

값 설정은 EUDCH 기술 논의 시 흔히 적용되는 값을 이용한다.As an example, 40 in FIG. 5 is a case where the method proposed by the present invention is applied, and 41 and 42 are cases where another OVSF code assignment or another I / Q channel assignment is applied to the E-DPCCH. Here, the PAPR result is obtained through computational experiments by applying the transmission pulse generator 452 and the scrambling code shown in the Rel-5 WCDMA standard, and apply the channel gain.

Value setting uses values that are commonly applied when discussing EUDCH techniques.

Referring to FIG. 5, 40 proposed by the present invention has a PAPR reduction effect of about 0.7 dB compared to 41. In addition, 40 proposed in the present invention has a PAPR reduction effect of about 0.12 dB compared to 42.

That is, the OVSF code and the I / Q channel allocation method of the E-DPCCH and the E-DPDCH proposed in the present invention can achieve a relatively small PAPR.

In the following sixth to ninth embodiments, the E-DPCCH is considered in consideration of transmission of the HS-DPCCH when one or more DPDCHs are transmitted while maintaining compatibility with the existing Rel-5 standard with respect to FIG. 4. And an OVSF code and an I / Q channel allocation method of the E-DPDCH.

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Sixth embodiment

1. When one or more DPDCHs can be transmitted and the HS-DPCCH is not transmitted;

The allocation of I / Q channel and OVSF codes of DPCCH and DPDCH according to the current standard is shown in Table 1 below.

That is, the DPCCH channel is transmitted using the OVSF code (256,0) in the Q channel, and the DPDCH can be allocated to the I channel with the OVSF code (SF _DPDCH , SF _DPDCH / 4). At this time, the SF _DPDCH has a value of 4, 8, 16, 32, 64, 128, 256, 512.

In consideration of compatibility with the current standard of Table 1, the I / Q channel and OVSF codes of the E-DPCCH and the E-DPDCH are allocated in the present invention as shown in Table 2 below.

In the above, the SF _E-DPCCH of the _E-DPCCH may be 8, 16, 32, 64, 128, 256, etc., and the SF _E-DPDCH of the _E-DPDCH is 4, 8, 16, 32, 64, 128, 256. , 512 and so on.

As shown in Table 2, up to five E-DPDCH channels can be transmitted. When SF = 4 is applied to E-DPDCH1, the E-DPDCH1 is transmitted using the OVSF code (4,1) in the Q channel. , E-DPDCH2 is transmitted in OVSF code (4,3) on the I channel. In addition, the E-DPDCH3 is transmitted using the OVSF code (4,3) in the Q channel, and the E-DPDCH4 is transmitted using the OVSF code (4,2) in the I channel. Finally, the E-DPDCH5 is transmitted using the OVSF code (4, 2) on the Q channel.

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2. When one or more DPDCHs can be transmitted and an HS-DPCCH is transmitted;

The I / Q channel and OVSF codes of DPCCH, DPDCH, and HS-DPCCH according to the current standard are allocated as shown in Table 3 below.

In consideration of compatibility with the current standard of Table 3, the allocation of I / Q channel and OVSF codes of E-DPCCH and E-DPDCH in the present invention is shown in Table 4 below.

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The SF _E-DPCCH of the _E-DPCCH may be 8, 16, 32, 64, 128, 256, etc., and the SF _E-DPDCH of the _E-DPDCH is 4, 8, 16, 32, 64, 128, 256, Values such as 512 are possible.
At this time, up to four E-DPDCH channels can be transmitted, and if SF _E-DPDCH = 4 is applied to E-DPDCH1, E-DPDCH1 and E-DPDCH2 are (Q, 4,3) and (I, 4,3), respectively. Is assigned to). E-DPDCH3 is transmitted using the OVSF code (4,2) on the Q channel, and E-DPDCH4 is transmitted using the OVSF code (4,2) on the I channel.

3. Up to two DPDCHs can be transmitted and the HS-DPCCH is not transmitted;

The allocation of I / Q channel and OVSF codes of DPCCH and DPDCH according to the current standard is shown in Table 5 below.

In consideration of compatibility with the current standard of Table 5, the I / Q channel and OVSF codes of the E-DPCCH and the E-DPDCH are allocated in the present invention as shown in Table 6 below.

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The SF _E-DPCCH of the _E-DPCCH may be 8, 16, 32, 64, 128, 256, etc., and the SF _E-DPDCH of the _E-DPDCH is 4, 8, 16, 32, 64, 128, 256, Values such as 512 are possible.
In this case, up to four E-DPDCH channels can be transmitted. When SF _E-DPDCH = 4 is applied, E-DPDCH1 and E-DPDCH2 respectively represent (Q, 4,3) and (I, 4,3). Is sent using. E-DPDCH3 is transmitted using the OVSF code (4,2) on the Q channel, and E-DPDCH4 is transmitted using the OVSF code (4,2) on the I channel.

4. Up to two DPDCHs can be transmitted and HS-DPCCHs are transmitted;

The I / Q channel and OVSF codes of the DPCCH, DPDCH, and HS-DPCCH according to the current standard are allocated as shown in Table 7 below.

In consideration of compatibility with the current standard of Table 7, the I / Q channel and OVSF codes of the E-DPCCH and the E-DPDCH are allocated in the present invention as shown in Table 8 below.

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In the above, the SF _E-DPCCH of the _E-DPCCH may be 64, 128, 256, etc., and the SF _E-DPDCH of the _E-DPDCH may have a value of 4, 8, 16, 32, 64, 128, 256, 512, etc. Do.
In this case, up to four E-DPDCH channels can be transmitted. When SF = 4, E-DPDCH1 and E-DPDCH2 are allocated to (I, 4, 3) and (Q, 4, 3), respectively. E-DPDCH3 is transmitted using the OVSF code (4,2) on the I channel, and E-DPDCH4 is transmitted using the OVSF code (4,2) on the Q channel.

5. Up to three DPDCHs can be transmitted and HS-DPCCHs are not transmitted;

The I / Q channel and OVSF codes of the DPCCH and DPDCH according to the current standard are allocated as shown in Table 9 below.

In consideration of compatibility with the current standard of Table 9, the I / Q channel and OVSF codes of the E-DPCCH and the E-DPDCH are allocated in the present invention as shown in Table 10 below.

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The SF _E-DPCCH of the _E-DPCCH may be 8, 16, 32, 64, 128, 256, etc., and the SF _E-DPDCH of the _E-DPDCH is 4, 8, 16, 32, 64, 128, 256, Values such as 512 are possible.
At this time, up to three E-DPDCH channels can be transmitted, and when SF = 4, the E-DPDCH1 is transmitted using the OVSF codes (4, 3) in the Q channel. E-DPDCH2 is transmitted using the OVSF code (4,2) on the I channel, and E-DPDCH3 is transmitted using the OVSF code (4,2) on the Q channel.

6. Up to three DPDCHs can be transmitted and HS-DPCCHs are transmitted;

The I / Q channel and OVSF codes of DPCCH, DPDCH, and HS-DPCCH according to the current standard are allocated as shown in Table 11 below.

In consideration of compatibility with the current standard of Table 11, the I / Q channel and OVSF codes of the E-DPCCH and the E-DPDCH are allocated in the present invention as shown in Table 12 below.

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The SF _E-DPCCH of the _E-DPCCH may be 8, 16, 32, 64, 128, 256, etc., and the SF _E-DPDCH of the _E-DPDCH is 4, 8, 16, 32, 64, 128, 256, Values such as 512 are possible.
At this time, up to three E-DPDCH channels can be transmitted, and when SF = 4, the E-DPDCH1 is transmitted using the OVSF codes (4, 3) in the Q channel. E-DPDCH2 is transmitted using the OVSF code (4,2) on the I channel, and E-DPDCH3 is transmitted using the OVSF code (4,2) on the Q channel.

7. Up to 4 DPDCHs can be transmitted and HS-DPCCHs are not transmitted;

The allocation of I / Q channel and OVSF codes of DPCCH and DPDCH according to the current standard is shown in Table 13 below.

In consideration of compatibility with the current standard of Table 13, the I / Q channel and OVSF codes of the E-DPCCH and the E-DPDCH are allocated in the present invention as shown in Table 14 below.

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The SF _E-DPCCH of the _E-DPCCH may be 8, 16, 32, 64, 128, 256, etc., and the SF _E-DPDCH of the _E-DPDCH is 4, 8, 16, 32, 64, 128, 256, 512. Such values are possible.
In this case, up to two E-DPDCH channels can be transmitted, and when SF = 4, the E-DPDCH1 is transmitted using the OVSF code (4, 2) in the I channel, and the E-DPDCH2 is transmitted in the OVSF in the Q channel. Is sent using code (4,2).

8. Up to 4 DPDCHs can be transmitted and HS-DPCCH is transmitted

The allocation of I / Q channel and OVSF codes of DPCCH and DPDCH according to the current standard is shown in Table 15 below.

In consideration of compatibility with the current standard of Table 15, the I / Q channel and OVSF codes of the E-DPCCH and the E-DPDCH are allocated in the present invention as shown in Table 16 below.

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In the above, the SF _E-DPCCH of the _E-DPCCH may be 64, 128, 256, etc., and the SF _E-DPDCH of the _E-DPDCH may have a value of 4, 8, 16, 32, 64, 128, 256, 512, etc. Do.
At this time, up to two E-DPDCH channels can be transmitted, and when SF = 4, the E-DPDCH1 is transmitted using the OVSF code (4, 2) on the I channel, and the E-DPDCH2 is the OVSF code on the Q channel. Is sent using (4,2).

9. When up to 5 DPDCHs can be transmitted and HS-DPCCH is not transmitted;

The allocation of I / Q channel and OVSF codes of DPCCH and DPDCH according to the current standard is shown in Table 17 below.

In consideration of compatibility with the current standard of Table 17, the allocation of I / Q channel and OVSF codes of E-DPCCH and E-DPDCH in the present invention is shown in Table 18 below.

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The SF _E-DPCCH of the _E-DPCCH may be 8, 16, 32, 64, 128, 256, etc., and the SF _E-DPDCH of the _E-DPDCH may be 8, 16, 32, 64, 128, 256, 512, etc. The value is possible. At most one E-DPDCH can be transmitted. The E-DPDCH1 is transmitted using the OVSF code (4, 2) in the Q channel.

10. Up to 5 DPDCHs can be transmitted and HS-DPCCH is transmitted;

The I / Q channel and OVSF codes of the DPCCH and DPDCH according to the current standard are allocated as shown in Table 19 below.

In consideration of compatibility with the current standard of Table 19, the allocation of I / Q channel and OVSF codes of E-DPCCH and E-DPDCH in the present invention is shown in Table 20 below.

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In the above, the SF _E-DPCCH of the _E-DPCCH may be 8, 16, 32, 64, 128, 256, etc., and only one E-DPDCH may be transmitted. The E-DPDCH1 is transmitted using the OVSF code (4, 2) in the Q channel.

Seventh embodiment

In the following seventh embodiment, a power backoff required by the RF power amplifier is similar to that of the sixth embodiment, but a simpler allocation rule is applied.

I / Q channel and OVSF code allocation of E-DPCCH and E-DPDCH is determined by the maximum number of DPDCHs that can be transmitted and whether HS-DPCCH is transmitted or not, and the basic rules are as follows.

* E-DPCCH: If the maximum number of DPDCHs that can be transmitted is 2 or 4, and HS-DPCCH is assigned to (I, 256, 1), it is used as (Q, SF _{E_DPCCH} , SF _{E_DPCCH} / 8). In this case, always use (I, SF _{E_DPCCH} , 1).

* E-DPDCH: When multiple DPDCH channels are transmitted, DPDCH is (I, 4, 1), (Q, 4, 1), (I, 4, 3), (Q, 4, 3) depending on the data rate. Use OVSF codes in the order they are listed:), (I, 4, 2), (Q, 4, 2), etc. Accordingly, the E-DPDCH additionally uses the remaining codes other than those set for DPDCH transmission among the six codes in the order listed above according to the EUDCH packet data rate.

HSDPA uses OVSF codes (256, 1) in I channel in case of stand-alone transmission in which only EUDCH is transmitted, and follows the Rel-5 standard when DPDCH is set.

This is because the allocation of the I / Q channel and the OVSF code of the E-DPCCH and the E-DPDCH as described above is optimal in terms of PAPR.

1. If HS-DPCCH is not set and for EUDCH independent transmission;

E-DPCCH always uses (I, SF _{E_DPCCH} , 1). In this case, the SF _{E_DPCCH} may have _values of 8, 16, 32, 64, 128, and 256.

In addition, the E-DPDCH is allocated an I / Q channel and an OVSF code according to the maximum number of DPDCHs that can be transmitted as shown in Table 21 below.

In Table 21, SF may be 4, 8, 16, 32, 64, 128, 256, 512 and the like. If the maximum number of DPDCHs that can be transmitted in Table 21 is 0, up to six codes may be used for the E-DPDCH for transmitting EUDCH data.

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For example, when all six channels are used according to the data rate of the EUDCH, the E-DPDCH1 transmits using the OVSF code (4,1) in the I channel, and the E-DPDCH2 transmits the OVSF code (Q) in the Q channel. Transmit using 4,1). E-DPDCH3 uses OVSF codes (4,3) on the I channel and E-DPDCH4 uses OVSF codes (4,3) on the Q channel. E-DPDCH5 may be allocated to transmit using the OVSF code (4,2) on the I channel and E-DPDCH6 may be allocated to transmit using the OVSF code (4,2) on the Q channel.

As another example, when the maximum number of DPDCHs that can be transmitted in Table 21 is 4, up to two codes may be used for the E-DPDCH for transmitting EUDCH data. For the E-DPDCH, E-DPDCH1 transmits using OVSF codes (SF, SF / 2) in I channel, and additionally allocated E-DPDCH2 transmits using OVSF codes (4, 2) in Q channel. Do it.

2.When up to 1 DPDCH can be transmitted and HS-DPCCH is set to (Q, 256, 64)

E-DPCCH always uses (I, SF _{E_DPCCH} , 1). In this case, SF _{E_DPCCH} may have a _value of 8, 16, 32, 64, 128, and 256.

In addition, the E-DPDCH includes four OVSF codes (I, SF, SF / 2 + SF / 4), (Q, 4, 3), (I, 4, 2), and (Q, 4, 2). Additional allocations are made in order according to the rate. In this case, SF may be 4, 8, 16, 32, 64, 128, 256, 512. Here, the OVSF codes (4, 1) in the Q channel are difficult to use for the E-DPDCH since the HS-DPCCH is assigned to (Q, 256, 64).

3. When two or more DPDCHs can be transmitted and HS-DPCCH is also set

The E-DPCCH is allocated an I / Q channel and an OVSF code as shown in Table 22 below according to the maximum number of DPDCHs that can be transmitted.

In this case, when the number of maximum transmittable DPDCHs is 2 or 4, if the HS-DPCCH is (I, 256, 1), the E-DPCCH uses (Q, SF _{E_DPCCH} , SF _{E_DPCCH} / 8). In this case, the SF _E-DPCCH may have values of 64, 128, and 256.

On the other hand, the E-DPDCH is allocated an I / Q channel and an OVSF code as shown in Table 21 according to the maximum number of DPDCHs that can be transmitted.

Eighth embodiment

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In the eighth embodiment, the E-DPDCH is first allocated to the Q channel and the I channel additionally allocated to the OVSF codes of the same index. At this time, the codes of the E-DPDCH are determined by the number of DPDCHs that can be transmitted most recently and whether HS-DPCCH is transmitted or not.

That is, according to the eighth embodiment, the number of DPDCHs and E-DPDCHs transmitted in the I / Q channel may be equal by allocating the DPDCHs from the I channel and the E-DPDCHs from the Q channel. In other words, when the HS-DPCCH transmits using the OVSF code (256, 64) on the Q channel or when the DPDCH is transmitted less than the maximum number of transmissions possible, the PAPR is excessive due to the DPDCH and E-DPDCH being biased on the I channel. Can be prevented from growing.

On the other hand, when the above-described OVSF code and I / Q channel allocation rules of the E-DPDCH are applied, the E-DPCCH corresponds to the DPCCH using the OVSF code (256, 0) in the Q channel. Minimize PAPR increase by transmitting to 1). SF may be 4, 8, 16, 32, 64, 128, and the like.
HSDPA uses OVSF codes (256, 1) in I channel for EUDCH stand-alone and follows Rel-5 standard when DPDCH is set. As described above, OVSF code allocation is optimal in terms of PAPR.

1. HS-DPCCH is not set and EUDCH is stand-alone;

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The E-DPDCH is allocated an I / Q channel and an OVSF code as shown in Table 23 below according to the maximum number of DPDCHs that can be transmitted.

In Table 23, SF may be 4, 8, 16, 32, 64, 128, 256, 512, and the like. In Table 23, when the maximum number of DPDCHs that can be transmitted is 0, up to six E-DPDCH channels may be transmitted. In this case, according to the number of E-DPDCH channels transmitted, the OVSF codes are (Q, SF, SF / 4), (I, 4, 1), (Q, 4, 3), (I, 4, 3), Used in the order (Q, 4, 2), (I, 4, 2).                     

On the other hand, when the maximum number of DPDCHs that can be transmitted is 1, since up to five codes can be used for the E-DPDCH channel for transmitting EUDCH data, up to five E-DPDCH channels can be transmitted. In this case, depending on the number of E-DPDCH channels transmitted, the OVSF codes are (Q, SF, SF / 4), (Q, 4, 3), (I, 4, 3), (Q, 4, 2), ( Used in the order of I, 4, 2).

As another example, when the maximum number of DPDCHs that can be transmitted in Table 23 is 4, at most two codes may be used for the E-DPDCH. In this case, when only one E-DPDCH is transmitted, the OVSF code (SF, SF / 2) is transmitted in the Q channel, and if necessary, the additionally allocated E-DPDCH uses the OVSF code (4, 2) in the I channel. To send it.

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2. When up to 1 DPDCH can be transmitted and HS-DPCCH is set to (Q, 256, 64);

In the E-DPDCH, four OVSF codes (Q, SF, SF / 2 + SF / 4), (I, 4, 3), (Q, 4, 2), and (I, 4, 2) correspond to the EUDCH data rate. According to the order of additional allocation. In this case, SF may be 4, 8, 16, 32, 64, 128, 256, 512.
For example, if only one E-DPDCH is transmitted, it is transmitted using the OVSF code (SF, SF / 2 + SF / 4) in the Q channel. This is to prevent the PAPR from increasing because data physical channels are biased on either I or Q channels. Accordingly, since the DPDCH is transmitted on the I channel and the E-DPDCH is transmitted on the Q channel and the number of data physical channels transmitted on the I and Q channels is equal, an increase in PAPR can be reduced.

3. When two or more DPDCHs can be transmitted and HS-DPCCH is set

The same code assignment rules as in Table 23 above apply.

9th embodiment

When several E-DPDCH physical channels are transmitted, an OVSF code with SF = 2 is applied to the E-DPDCH except in the following cases to further lower PAPR.

For example, when (I, 4, 3) and (I, 4, 2) are simultaneously allocated to the E-DPDCH for the multi-code transmission of the E-DPDCH, the (I, 2, 1) to transmit. That is, when the OVSF codes (4, 3) and (4, 2) are transmitted using the I channel at the same time, the E-DPDCH is transmitted using the OVSF codes (2, 1) code on the I channel.

As above, when the OVSF codes (4, 3) and (4, 2) are simultaneously assigned to the E-DPDCH in the Q channel, the E-DPDCH is transmitted using the OVSF code (2, 1) code in the Q channel. . That is, it transmits using (Q, 2, 1) to the E-DPDCH.

The following tenth embodiment provides a method in which the E-DPDCH additionally uses codes that can be generated from the OVSF codes (4, 1), including the Q channel OVSF codes (256, 64) used by the HS-DPCCH channel. I would like to. Or, we propose a method in which the E-DPDCH additionally uses codes allocated to the DPDCH.
10th embodiment

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The tenth embodiment uses the OVSF codes (Q, 256, 64) used for the HS-DPCCH for the additional E-DPDCH. That is, the HS-DPCCH allows the OVSF codes 256 and 32 to be used in the Q channel, thereby ensuring the data rate of the E-DPDCH. The OVSF code and I / Q channel allocation method of the E-DPDCH for this case are summarized as follows.

1. When two or less E-DPDCH channels are transmitted;

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The methods proposed in the first to fifth embodiments are applied.

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2. when three E-DPDCH channels are transmitted;

E-DPDCH1 and E-DPDCH2 are assigned to I and Q channels with OVSF codes (2, 1), respectively. E-DPDCH3 is assigned to the Q channel with the OVSF code (4, 1). In this case, BPSK modulation is applied to data transmitted through the E-DPDCH3.
Alternatively, the method used for the E-DPDCH using the OVSF code applied to the DPDCH is as follows.

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1. when three or fewer E-DPDCH channels are transmitted;

The same method as in the sixth to ninth embodiments is applied.

2. Four E-DPDCH channels are transmitted;

If the DPDCH is not transmitted, the fourth E-DPDCH is transmitted using the OVSF code (4, 1) on the I channel.

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As described above, in the present invention, in the method for allocating an OVSF code and an I / Q channel to an uplink physical channel, the E-DPDCH for the EUDCH service is maintained while maintaining backward compatibility for the uplink physical channel DPDCH and DPCCH. We propose an OVSF code and an I / Q channel allocation method optimized for E-DPCCH.
In addition, in order to improve the maximum EUDCH data rate, we propose an HS-DPCCH channel OVSF code that is different from the existing Rel-5 standard and is optimized for E-DPDCH and E-DPCCH for the EUDCH service. We propose OVSF code and I / Q channel allocation method.
Therefore, it is possible to minimize PAPR increase in packet data transmission according to the EUDCH service provision and to minimize errors in EUDCH packet data transmission. Therefore, it has the effect of increasing EUDCH service capacity.

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Claims (55)

In the method for transmitting enhanced packet data in a mobile communication system, When downlink high speed packet access (HSDPA) is established, the first enhanced uplink dedicated physical data channel (E-DPDCH) signal is allocated to the I channel, and the second E-DPDCH signal is allocated to the Q channel. Process, When the HSDPA is not set, allocating the signal of the first E-DPDCH to the Q channel and allocating the signal of the second E-DPDCH to the I channel; Allocating a signal of an enhanced uplink dedicated physical control channel (E-DPCCH) for the E-DPDCHs to the I channel; And adding and transmitting the allocated E-DPDCHs and the E-DPCCH. The method of claim 1, The signal of the E-DPCCH is spread over the I-channel with an orthogonal variable spread index (OVSF) code (256, 1) and transmitted. The method of claim 1, The signal of the dedicated physical control channel (HS-DPCCH) for the HSDPA, when one dedicated physical data channel (DPDCH) is set, characterized in that is spread over the OVSF code (256, 64) on the Q channel and transmitted Improved packet data transmission method. The method of claim 1, The signal of the first E-DPDCH and the signal of the second E-DPDCH are spread and transmitted in an OVSF code (SF _E-DPDCH , SF _E-DPDCH / 2). Here, the SF _E-DPDCH is an enhanced packet data transmission method, characterized in that the predetermined spreading index. The method of claim 4, wherein The signal of the first E-DPDCH and the signal of the second E-DPDCH are spread and transmitted in the OVSF code (2, 1) on the I channel or the Q channel. The method of claim 1, If the dedicated physical data channel (DPDCH) is not set, the third E-DPDCH signal and the fourth E-DPDCH signal are additionally allocated. And the third E-DPDCH signal and the fourth E-DPDCH signal are spread and transmitted in an OVSF code (4, 1) on the I channel or the Q channel. In the method for transmitting enhanced packet data in a mobile communication system, Spreading and transmitting a signal of a dedicated physical control channel (DPCCH) to an orthogonal variable spread index (OVSF) code (256, 0) on a Q channel; Spreading and transmitting a signal of a dedicated physical data channel (DPDCH) to an OVSF code (SF _DPDCH , SF _DPDCH / 4) on an I channel; Spreading and transmitting a signal of an enhanced dedicated physical control channel (E-DPCCH) to an OVSF code (SF _E-DPCCH , 1) on the I channel; Spreading and transmitting an enhanced dedicated physical data channel (E-DPDCH) signal to an OVSF code (SF _E-DPDCH , SF _E-DPDCH / 2) on the Q channel; Wherein the SF _DPDCH , SF _E-DPCCH and SF _E-DPDCH are predetermined spreading indexes. The method of claim 7, wherein When transmitting a signal of one E-DPDCH, the signal of the one E-DPDCH is spread over the Q channel with an OVSF code (2, 1) is transmitted, characterized in that the transmission method. The method of claim 7, wherein In case of transmitting signals of two E-DPDCHs, the signals of the two E-DPDCHs are spread and transmitted in OVSF codes (2, 1) on the I channel or the Q channel. . The method of claim 9, And the signals of the two E-DPDCHs are spread in OVSF code (4, 2) on the I channel or the Q channel and transmitted simultaneously. The method of claim 7, wherein The signal of the E-DPCCH is spread over the I-channel with OVSF code (256, 1) is transmitted, characterized in that the transmission. The method of claim 7, wherein When downlink high speed packet access (HSDPA) is established, a signal of a dedicated physical control channel (HS-DPCCH) for the HSDPA is spread over QSF codes 256 and 64 on the Q channel. Improved packet data transmission method. The method of claim 7, wherein If the dedicated physical data channel (DPDCH) is not set, the third E-DPDCH signal and the fourth E-DPDCH signal are additionally transmitted. The signal of the third E-DPDCH and the signal of the fourth E-DPDCH are spread by OVSF codes (4, 1) and are transmitted. The method of claim 13, The signal of the third E-DPDCH is transmitted on the I channel, The signal of the fourth E-DPDCH is transmitted on the Q channel. An apparatus for transmitting enhanced packet data in a mobile communication system, When the downlink high speed packet access (HSDPA) is set, the signal of the first enhanced uplink dedicated physical data channel (E-DPDCH) is allocated to the I channel, and the signal of the second E-DPDCH is assigned to the Q channel, If the HSDPA is not configured, the signal of the first E-DPDCH is allocated to the Q channel, the signal of the second E-DPDCH is allocated to the I channel, and enhanced uplink dedicated physical for the E-DPDCHs. A control unit which controls to allocate a signal of a control channel (E-DPCCH) to the I channel; A spreader configured to spread the signals of the E-DPDCHs and the signals of the E-DPCCH at a predetermined spread index under the control of the controller; An adder for adding the signals of the E-DPDCHs and the signal of the E-DPCCH; And a transmitter for transmitting the added signals. The method of claim 15, wherein the control unit, And control the signal of the E-DPCCH to be spread and transmitted by an orthogonal variable spread index (OVSF) code (256, 1). The method of claim 15, wherein the control unit, When one dedicated physical data channel (DPDCH) is set, the control signal is transmitted to the OVSF code (256, 64) by spreading the signal of the dedicated physical control channel (HS-DPCCH) for the HSDPA on the Q channel. An improved packet data transmission device. The method of claim 15, wherein the control unit, The first E-DPDCH signal and the second E-DPDCH signal are controlled to be spread and transmitted by OVSF codes (SF _DPDCH , SF _DPDCH / 2), Wherein the SF _E-DPDCH is a predetermined spreading index. The method of claim 18, wherein the control unit, And transmitting the signal of the first E-DPDCH and the signal of the second E-DPDCH to spread and transmit the OVSF code (2, 1) on the I channel or the Q channel. The method of claim 15, wherein the control unit, If the DPDCH is not set, the third E-DPDCH signal and the fourth E-DPDCH signal are additionally allocated. And transmitting the third E-DPDCH signal and the fourth E-DPDCH signal by spreading the OVSF code (4, 1) on the I channel or the Q channel. An apparatus for transmitting enhanced packet data in a mobile communication system, Spreads and transmits the signal of the dedicated physical control channel (DPCCH) to the orthogonal variable spread index (OVSF) code (256, 0) on the Q channel, and transmits the signal of the dedicated physical data channel (DPDCH) to the OVSF code (SF _DPDCH) on the I channel. And spreads the signal through the SF _DPDCH / 4), and spreads the signal of the enhanced dedicated physical control channel (E-DPCCH) to the OVSF code (SF _E-DPCCH , 1) on the I channel, and improves the dedicated physical data channel. A control unit which controls to spread (E-DPDCH) signals to (SF _E-DPDCH , SF _E-DPDCH / 2) and transmit them on the Q channel; A spreader which spreads the signal of the DPDCH, the signals of the E-DPDCH and the signal of the DPCCH, and the signal of the E-DPCCH at a predetermined spread index under the control of the controller; An adder for adding the signal of the DPDCH, the signal of the E-DPDCH and the signal of the DPCCH, and the signal of the E-DPCCH; And a transmitter for transmitting the added signals. The method of claim 21, wherein the control unit, And transmitting the signal of one E-DPDCH by spreading the signal of one E-DPDCH with an OVSF code (2, 1) on the Q channel. The method of claim 21, wherein the control unit, In case of transmitting signals of two E-DPDCHs, enhanced packet data characterized in that the signals of the two E-DPDCHs are spread and transmitted to the OVSF code (2, 1) on the I channel or the Q channel. Transmission device. The method of claim 21, wherein the control unit, In case of transmitting signals of two E-DPDCHs, enhanced packet data characterized in that the signals of the two E-DPDCHs are spread and transmitted to the OVSF codes (4, 2) on the I channel or the Q channel. Transmission device. The method of claim 21, wherein the control unit, And control the signal of the E-DPCCH to be spread and transmitted through an OVSF code (256, 1) on the I channel. The method of claim 21, wherein the control unit, When the downlink high speed packet access (HSDPA) is set, it is controlled to spread and transmit the signal of the dedicated physical control channel (HS-DPCCH) for the HSDPA to the OVSF code (256, 64) on the Q channel Improved packet data transmission apparatus. The method of claim 26, wherein the control unit, If the dedicated physical data channel (DPDCH) is not set, the third E-DPDCH signal and the fourth E-DPDCH signal are additionally transmitted. And transmitting the third E-DPDCH signal and the fourth E-DPDCH signal by spreading the OVSF code (4, 1) on the I channel or the Q channel. In the method for receiving enhanced packet data in a mobile communication system, Transmitting scheduling allocation information for the enhanced packet data to a terminal; When downlink high speed packet access (HSDPA) is configured, a process of receiving a signal of the first enhanced uplink dedicated physical data channel (E-DPDCH) on the I channel and a signal of the second E-DPDCH on the Q channel. and, Receiving the first E-DPDCH on the Q channel and receiving the second E-DPDCH on the I channel when the downlink high speed packet access (HSDPA) is not configured; Receiving a signal of an enhanced uplink dedicated physical control channel (E-DPCCH) for the E-DPDCHs on the I-channel. The method of claim 28, And the signal of the E-DPCCH is despread and received with an orthogonal variable spread index (OVSF) code (256, 1) through the I channel. The method of claim 28, The signal of the dedicated physical control channel (HS-DPCCH) for the HSDPA is despread and received as OVSF codes (256, 64) on the Q channel when one dedicated physical data channel (DPDCH) is set. Improved packet data reception method. The method of claim 28, The signal of the first E-DPDCH and the signal of the second E-DPDCH are despread with a OVSF code (SF _DPDCH , SF _DPDCH / 2) and received. Here, the SF _E-DPDCH is an enhanced packet data receiving method, characterized in that the predetermined spreading index. 32. The method of claim 31, The signal of the first E-DPDCH and the signal of the second E-DPDCH are despread and received with an OVSF code (2, 1) on the I channel or the Q channel. The method of claim 28, If the dedicated physical data channel (DPDCH) is not set, additionally receives the signal of the third E-DPDCH and the fourth E-DPDCH, The signal of the third E-DPDCH and the signal of the fourth E-DPDCH are despread and received with an OVSF code (4, 1) through the I channel or the Q channel. In the method for receiving enhanced packet data in a mobile communication system, Transmitting scheduling allocation information for the enhanced packet data to a terminal; Despreading and receiving a signal of a dedicated physical control channel (DPCCH) with an orthogonal variable spread index (OVSF) code (256, 0) on a Q channel; Despreading and receiving a signal of a dedicated physical data channel (DPDCH) with an OVSF code (SF _DPDCH , SF _DPDCH / 4) on an I channel; Despreading and receiving an enhanced dedicated physical control channel (E-DPCCH) signal with an OVSF code (SF _E-DPCCH , 1) on the I channel; Receiving a packet of an enhanced dedicated physical data channel (E-DPDCH) by despreading and receiving an OVSF code (SF _E-DPDCH , SF _E-DPDCH / 2) on the Q channel. Way. The method of claim 34, In case of transmitting one E-DPDCH signal, the one E-DPDCH signal is despread and received with an OVSF code (2, 1) on the Q channel. The method of claim 34, In case of receiving signals of two E-DPDCHs, the signals of the two E-DPDCHs are despread and received with OVSF codes (2, 1) through the I channel or the Q channel. Receiving method. The method of claim 34, In case of receiving signals of two E-DPDCHs, the signals of the two E-DPDCHs are despread and received with OVSF codes (4, 2) on the I channel or the Q channel. Way. The method of claim 34, And the signal of the E-DPCCH is despread and received with an OVSF code (256, 1) through the I channel. The method of claim 34, When downlink high speed packet access (HSDPA) is established, a signal of a dedicated physical control channel (HS-DPCCH) for the HSDPA is spread over the Q channel with OVSF codes (256, 64). Improved method of receiving packet data. The method of claim 34, When the dedicated physical data channel (DPDCH) is not set, the third E-DPDCH signal and the fourth E-DPDCH signal are additionally received. The signal of the third E-DPDCH and the signal of the fourth E-DPDCH are despread and received with an OVSF code (4, 1). The method of claim 40, Wherein the signal of the third E-DPDCH is received on the I channel, and the signal of the fourth E-DPDCH is received on the Q channel. An apparatus for receiving enhanced packet data in a mobile communication system, A transmitter for transmitting scheduling allocation information for the enhanced packet data to a terminal; A receiver for receiving signals of an enhanced uplink dedicated physical data channel (E-DPDCH) and an enhanced uplink dedicated physical control channel (E-DPCCH) for the E-DPDCHs; When downlink high speed packet access (HSDPA) is established, the first E-DPDCH signal is received on the I channel, the second E-DPDCH signal is received on the Q channel, and the downlink high speed packet access (HSDPA) is received. If not set, receive the signal of the first E-DPDCH on the Q channel, the signal of the second E-DPDCH on the I channel, and the signal of the E-DPCCH on the I channel. And a control unit for controlling the receiving unit. The method of claim 42, wherein the control unit, And receiving the control unit to despread and receive the signal of the E-DPCCH with an orthogonal variable spread index (OVSF) code (256, 1) on the I channel. The method of claim 42, wherein the control unit, The signal of the dedicated physical control channel (HS-DPCCH) for the HSDPA is despread with the OVSF codes (256, 64) on the Q channel when one dedicated physical data channel (DPDCH) is set. Improved packet data receiving apparatus, characterized in that for controlling the receiving unit. The method of claim 42, wherein the control unit, And controlling the receiver to despread and receive the first E-DPDCH signal and the second E-DPDCH signal using OVSF codes (SF _DPDCH , SF _DPDCH / 2). The method of claim 42, wherein the control unit, And controlling the receiver to despread and receive the signal of the first E-DPDCH and the signal of the second E-DPDCH with OVSF codes (2, 1) on the I channel or the Q channel. Packet data receiving device. The method of claim 42, wherein the control unit, If the DPDCH is not set, controlling the receiving unit to despread and receive the signal of the third E-DPDCH and the signal of the fourth E-DPDCH with OVSF codes (4, 1) on the I channel or the Q channel. An improved packet data receiving apparatus, characterized in that. An apparatus for receiving enhanced packet data in a mobile communication system, A transmitter for transmitting scheduling allocation information for the enhanced packet data to a terminal; A signal of a dedicated physical control channel (DPCCH), a signal of a dedicated physical data channel (DPDCH), an signal of an enhanced uplink dedicated physical data channel (E-DPDCH), and an enhanced uplink for the E-DPDCHs from the terminal A receiving unit for receiving a dedicated physical control channel (E-DPCCH), The DPCCH signal is despread with an orthogonal variable spread index (OVSF) code (256, 0) on a Q channel, and the signal of the DPDCH is despread with an OVSF code (SF _DPDCH , SF _DPDCH / 4) on an I channel. Receive the signal of the E-DPCCH by despreading the signal of the E-DPCCH with the OVSF code (SF _E-DPCCH , 1) on the I channel, and receive the signal of the E-DPDCH with the OVSF code (SF _E-DPDCH) on the Q channel. And a control unit which controls the receiving unit to despread and receive the SF _E-DPDCH / 2). The method of claim 48, wherein the control unit, Enhanced packet data, characterized in that for controlling the receiver to despread and receive the signal of one E-DPDCH in the OVSF code (2, 1) on the Q channel when transmitting the signal of one E-DPDCH Receiving device. The method of claim 48, wherein the control unit, In case of transmitting signals of two E-DPDCH, the receiving unit is controlled to despread and receive the signals of the two E-DPDCH with OVSF code (2, 1) on the I channel or the Q channel. Improved packet data receiving device. The method of claim 48, wherein the control unit, In case of transmitting signals of two E-DPDCH, the receiving unit is controlled to despread and receive the signals of the two E-DPDCH with OVSF codes (4, 2) on the I channel or the Q channel. Improved packet data receiving device. The method of claim 48, wherein the control unit, And controlling the receiver to despread and receive the signal of the E-DPCCH with an OVSF code (256, 1) through the I channel. The method of claim 48, wherein the control unit, If the downlink high-speed packet access (HSDPA) is set, the receiving unit to despread and receive the signal of the dedicated physical control channel (HS-DPCCH) for the HSDPA in the OVSF code (256, 64) on the Q channel Improved packet data receiving device characterized in that the control. The method of claim 48, wherein the control unit, If the DPDCH is not set, the third E-DPDCH signal and the fourth E-DPDCH signal are additionally received. And the receiver controls to despread and receive the signal of the third E-DPDCH and the signal of the fourth E-DPDCH with an OVSF code (4, 1). The method of claim 54, wherein the control unit, Receiving a signal of the third E-DPCCH on the I channel, And controlling the receiver to receive the signal of the fourth E-DPCCH on the Q channel.

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