KR20010091790A - Physical channel allocation mehtod for mobile telecommunication system - Google Patents

Abstract

PURPOSE: A method for allocating physical channels in a mobile communication system is provided to offer an efficient physical channel allocation method in case that a 3GPP(3rd Generation Partnership Project) system allocates redundant up-link scrambling codes for each cell and 16 signatures. CONSTITUTION: In case that a 3GPP system allocates 16 signatures and x nos. PCPCH(Physical Common Packet CHannel) scrambling codes per cell in consideration of the reuse of PCPCHs, the PCPCH scrambling codes are classified by y nos. CPCH code channels. At this moment, the PCPCH scrambling codes that belong to each CPCH code channel are used for a PCPCH message part scrambling code. Two of the PCPCH scrambling codes are selected for use in a PCPCH preamble scrambling code and a PCPCH CD access preamble scrambling code. For example, if x is 64, y is 4. Accordingly, 4 CPCH code channels are generated. Each CPCH code channel has 16 PCPCH scrambling codes.

Description

PHYSICAL CHANNEL ALLOCATION MEHTOD FOR MOBILE TELECOMMUNICATION SYSTEM}

The present invention relates to a channel allocation technology in a 3GPP (3rd Generation Partnership Project) system, which is one of the next generation mobile communication standards, and particularly for a Common Packet Channel (CPCH) having an extra up-link scrambling code. The present invention relates to a physical channel allocation method of a mobile communication system that is adapted to allocate a physical channel more efficiently.

In the 3GPP system according to the prior art, the CPCH of the uplink channel used by the user equipment (UE) to send data to the base station uses 16 signatures and 16 scrambling codes for physical channel allocation. That is, the terminal may use an "Access Preamble Signature" C _{sig, s} made using any one of 16 signature AP # s (s = 0, ..., 15) and one specific "PCACH given per cell. The "PCPCH access preamble code" C _{c-acc, n, s} is generated using the Physical CPCH preamble scrambling code S _{c-acc, n} . Then, it is loaded into an "access preamble" (AP) and transmitted to the base station. At this time, the PCPCH access preamble code C _{c-acc, n, s} is a sequence having a complex value generated as shown in Equation 1 below.

--- (Equation 1)

Here, k = 0 corresponds to the chip transmitted first at the corresponding time, and s (s = 0, ..., 15) is the signature number. In addition, the terminal may access the " access preamble signature _" C _{sig, s} generated using any one of the 16 signature AP # s (s = 0, ..., 15) and one specific "per cell". The "PCPCH CD preamble code" C _{c-cd, n, s} is generated using the PCPCH CD access preamble scrambling code S _{c-cd, n} . Then, it is loaded on a CD preamble (hereinafter, abbreviated as "CD") and transmitted to the base station. At this time, the PCPCH CD preamble code C _{c-cd, n, s} is a sequence having a complex value generated as shown in Equation 2 below.

--- (Eq. 2)

The physical channel allocation scheme of the existing CPCH is as follows. Each of the 16 signatures AP # 0 to AP # 15 corresponds to 16 "PCPCH message part scrambling codes" in a 1: 1 fashion. Therefore, when the terminal receives a specific signature on the AP and transmits it, and receives an Acquisition Indicator (AI), which is an acknowledgment signal through the Acquisition Indicator Channel (APH-AICH), the terminal transmits the CD. Then, when the base station transmits the acknowledgment signal again through the CD-AICH, the terminal transmits its own message using the PCPCH message partial scrambling code corresponding to the available OVSF code and the signature approved through the AP-AICH. In this case, the message includes a data part and a control part.

At this time, the approval process of the transmitted AP and CD is as shown in FIG. First, when the user terminal UE transmits an access preamble (AP), the base station transmits information on whether to approve through the AP-AICH. At this time, if the grant signal is found on the AP-AICH, the UE transmits the CD again to determine whether or not the collision. This CD uses the same signatures AP # 0 to AP # 15 as the signatures used by the AP, and the "PCPCH CD access preamble scrambling code" is used for the PCPCH access preamble scrambling code. Use another part. Then, the base station informs the UE of the information on whether or not the collision through the CD-AICH. At this time, the AP-AICH and the CD-AICH use the same down-link scrambling code S _{dl, n} and a different type of channelization code.

Meanwhile, the channelization code (OVSF Orthogonal Variable Spreading Factor) requires two types of codes for the data portion and the control portion of the message to be transmitted, and all the terminals approved for CPCH transmission use the OVSF code in one OVSF code set. Select and use. That is, all terminals select the OVSF code for the message portion of the PCPCH from among the codes shown in FIG. 2B. At this time, the OVSF code for the data portion and the control portion of the message to be transmitted is assigned an OVSF code required by a specific rule (or equation). SF = 32 to 256 in the OVSF code for the data part and the control part of the message. In this case, the division of the PCPCHs used by each terminal is set to "PCPCH message partial scrambling code", and all PCPCHs use the same type of OVSF codes. In FIG. 2B, C _{ch, SF, k} means an OVSF code _{, where SF} means a spreading factor, and k means which code is the OVSF code having the corresponding SF. That is, C _{ch, SF, m} are code values assigned to each node in the OVSF code tree. This is shown in Fig. 2A, and is defined as follows (Equation 3)-(Equation 5).

-------------------------------------- (Equation 3)

------------- (Equation 4)

----- (Eq. 5)

Therefore, in the conventional scheme, 16 PCPCH message partial scrambling codes and one PCPCH access preamble scrambling code are allocated for each AP, and each PCPCH message partial scrambling code is assigned to the signature AP # s. It is in a 1: 1 correspondence.

As described above, in the conventional technology, only 16 PCPCH message partial scrambling codes per cell and one PCPCH access preamble code are allocated to their APs, thereby preventing the efficient reuse of PCPCH.

Recently, 4 * 16 = 64 PCPCH access preamble scrambling codes (or PCPCH message partial scrambling codes) have been allocated per cell for CPCH, which is determined by various needs, and one of them is one of them. Is for reuse of PCPCH.

Accordingly, a first object of the present invention is to provide an efficient physical channel allocation method for allocating 16 signatures and an extra uplink scrambling code per cell in a 3GPP system.

It is a second object of the present invention to provide a series of "PCPCH access procedures" for achieving a physical channel allocation method.

A third object of the present invention is to provide an AP-AICH and CD-AICH structure suitable for allocating 16 signatures and multiple PCPCH scrambling codes per cell in a 3GPP system.

1 is a diagram illustrating an approval procedure of a CPCH according to the prior art.

2A is an OVSF code tree used by a conventional 3GPP system.

2B is an explanatory diagram of OVSF code allocation for a message portion of PCPCH in the prior art.

3 is an explanatory diagram showing an AICH structure in 3GPP according to the prior art;

4 is an access slot table corresponding to RACH subchannels in 3GPP according to the prior art.

5 is an explanatory diagram showing a spreading structure of a message portion of PCPCH in the prior art;

FIG. 6A is an exemplary table in which definitions of CPCH subchannels belonging to a CPCH code channel and corresponding access slots are the same according to all CPCH code channels in the present invention. FIG.

FIG. 6B is an exemplary table in which definitions of CPCH subchannels belonging to a CPCH code channel and corresponding access slots are different according to CPCH code channels in the present invention. FIG.

FIG. 6C is another exemplary table where definitions of CPCH subchannels belonging to a CPCH code channel and an access slot corresponding thereto differ according to a CPCH code channel. FIG.

7A is an exemplary transmission process of AP-AICH # m according to the present invention.

7B is an exemplary transmission process of CD-AICH # m according to the present invention.

8A illustrates an OVSF code allocation for AP-AICH # m and CD-AICH # m according to the present invention.

8b is another exemplary diagram of OVSF code allocation for AP-AICH # m and CD-AICH # m according to the present invention;

9 is a format diagram showing the structure of AP-AICH # m and CD-AICH # m according to the present invention;

10 is a pattern table of signatures used by AP-AICH # m and CD-AICH # m in the present invention.

*** Description of the symbols for the main parts of the drawings ***

S / P: Serial / Parallel Converter

According to the first aspect of the present invention, in the case of allocating 16 signature AP # s (s = 0,…, 15) and x “PCPCH scrambling codes” per cell in consideration of reuse of PCPCH in 3GPP system, etc. , x PCPCH scrambling codes are classified into y "CPCH Code-channels". At this time, the PCPCH scrambling code belonging to each CPCH code channel is used for the "PCPCH message part scrambling code" (PCPCH message part scrambling code), select two of the "PCPCH access preamble scrambling code" (PCPCH preamble scrambling cod) ) And the "PCPCH CD access preamble scrambling code" (PCPCH CD access preamble scrambling cod). For example, if x = 64, then y = 4. That is, four CPCH code channels (Code-channel # 0 to Code-channel # 3) are generated, and Code-channel # m has 16 PCPCH scrambling codes.

According to the second aspect of the present invention, in the case of allocating 16 signature AP # s (s = 0,…, 15) and x “PCPCH scrambling codes” per cell in consideration of reuse of PCPCH in a 3GPP system, In order to receive the PCPCH, the terminal selects the AP using one of the 16 signature AP # s and any one of the "PCPCH access preamble scrambling code" APS # m (m = 0, ..., 15) assigned to the corresponding cell. send.

According to the third aspect of the present invention, in the case of allocating 16 signature AP # s (s = 0, ..., 15) and x "PCPCH scrambling codes" per cell in consideration of reuse of PCPCH in a 3GPP system, In order to be assigned PCPCH, the terminal uses any one of 16 signature AP # s and one of the "PCPCH CD access preamble scrambling code" CD-APSC # m (m = 0, ..., M) assigned to the corresponding cell. To transfer the CD.

According to a fourth aspect of the present invention, a signature and a PCPCH access preamble scrambling code (or PCPCH CD access free) that a terminal to which the first, second, and third features of the present invention are applied may use in an AP (or CD) for CPCH transmission. Emblem scrambling code) is given by a higher layer for corresponding CPCH transmission. At this time, the concept of "Access Service Class" (ASC) may be used.

According to the fifth aspect of the present invention, if the AP and CD transmitted according to the first to fourth aspects are approved by the base station, the terminal transmits its own message using the PCPCH message partial scrambling code MSC # n. At this time, MSC # n is uniquely determined by APSC # m and AP # s used in the AP. That is, if the CPCH code channel to which APSC # m belongs is Code-channel # m, MSC # n is determined by AP # s, and APSC # m and MSC # n are assigned to Code-channel # m defined in the first feature. The codes belong. Here, the relationship of m, s, n should be defined in advance.

According to a sixth aspect of the present invention, for an AP and a CD transmitted by a terminal according to the above features, the base station informs whether the AP is allowed through several AP-AICHs and CD-AICHs. In this case, the number of AICHs is determined by the number of PCPCH scrambling codes allocated to the corresponding cell. As an example, if there are four CPCH code channels (Code-channel # 0 to Code-channel # 3), four AP-AICHs and CD-AICHs are required. That is, AP-AICH # m is responsible for authentication of AP using APSC # m, and CD-AICH # m is responsible for authentication of CD using CD-APS # m. In this case, APSC # m and AP-AICH # m have a 1: 1 correspondence, and CD-APSC # m and CD-AICH # m have a 1: 1 correspondence.

According to a seventh aspect of the present invention, AP-AICHs and CD-AICHs according to the sixth aspect of the present invention commonly use the same one downlink scrambling code. At this time, all kinds of AICHs use different OVSF codes as channelization codes. That is, AP-AICH # m and its channelization code Has a 1: 1 correspondence, CD-AICH # m and its channelization code Fig. 1 is also in a correspondence relationship. Also, any With random Are not the same as each other.

According to an eighth aspect of the present invention, AP-AICHs according to the sixth aspect of the present invention commonly use the same downlink scrambling code, and CD-AICHs share the same downlink scrambling code. Used as However, since the downlink scrambling code used by the AP-AICHs and the downlink scrambling code used by the CD-AICHs must be different, a total of two downlink scrambling codes exist. At this time, each AP-AICH uses a different OVSF code as a channelization code, and each CD-AICH also uses a different OVSF code as a channelization code. That is, AP-AICH # m and its channelization code Has a 1: 1 correspondence, CD-AICH # m and its channelization code It is in the correspondence relationship of FIG. 1: 1. However, random Wow May be the same or different.

When described in detail with reference to Figure 6 to Figure 10 attached to the operation of the present invention as follows.

If 16 signatures AP # s (s = 0,…, 15) and x “PCPCH scrambling codes” are assigned per cell for PCPCH transmission, x PCPCH scrambling codes are assigned to y “CPCH code channels” (CPCH Code). -channel). All PCPCH scrambling codes belonging to each CPCH code channel are used to make a "PCPCH message part scrambling code", select two of them and select "PCPCH access preamble scrambling code" (PCPCH access preamble scrambling code). code) and the "PCPCH CD access preamble scrambling code". In the following description, it is assumed that x = 64 for convenience of description. When x = 64, four CPCH code channels are generated, and each CPCH code channel has 16 PCPCH scrambling codes.

64 (= x) PCPCH scrambling codes in total Is a long code with a real value such as "Gold sequence". Here, "i" means the I-th bit among all the bits constituting the code, and "n" means {0, 1, ... for convenience. , 62,63}. At this time, Are classified into 4 (= y) CPCH code channels as follows.

---------- (Eq. 6)

------- (Eq. 7)

------- (Eq. 8)

------- (Eq. 9)

64 PCPCH message partial scrambling codes MSC # n (n = 0, ..., 63) are generated per cell. As an example, it may be defined as follows (Formula 10), (Formula 11).

In the formula (10) and (11), Is A long code with a complex number created using On the other hand, as another case, the PCPCH message partial scrambling code MSC # n is a shot code having a certain complex value. It may be generated using the following equation (12).

remind 4 (= y) "PCPCH Access Preamble Scrambling Codes" per Cell Using APSC # m (m = 0, ..., 3) and 4 (= y) "PCPCH CD Access Preambles" Code "CD-APSC # m (m = 0, ..., 3) is generated. As an example, it may be defined as follows (Equation 13), (Equation 14).

---------------- (Eq. 13)

----------- (Eq. 14)

In Equations 13 and 14, the relationship between n and m may be arbitrarily determined, but APSC # m and CD-APSC # m are different. Should be defined by Hereinafter, for the convenience of description, the expressions according to (13)-(16) are used.

------------ (Eq. 15)

------ (Eq. 16)

APSC # m (m = 0,…, 3) and CD-APSC # m (m = 0,…, 3) have a 1: 1 correspondence with Code-channel # m (m = 0,…, 3), respectively. have. Hereinafter, it is assumed that APSC # m has a 1: 1 correspondence with Code-channel # m. That is, in case of acknowledgment using APSC # m, the PCPCH message portion scrambling code for transmitting the CPCH message portion uses MSC # n belonging to Code-channel # m. Summarizing the above relationship, codes belonging to each CPCH code channel are defined by the following expressions (17)-(20).

-(Eq. 17)

-(Eq. 18)

-(Eq. 19)

-(Eq. 20)

A terminal or user equipment (UE) generates and transmits an AP through the following process. The terminal generates a preamble signature generated using any one of 16 signature AP # s (s = 0,…, 15) And allowed in that cell APSC # m (m = 0,…, ) To transmit the AP. remind Is the number representing the reuse element of the cell, which may be determined at system design, whose range is 1≤. ≤ to be. if, " = 1 "means an existing system with no reuse factor considered," = Is used, the PCPCH scrambling code allocated to each cell is used, and the reuse factor is considered to the maximum. Assume that = 4. 1≤ ≤4.

When the terminal intends to transmit CPCH through PCPCH, AP # s, APSC # m, and CD-APSC # m that can be substantially used when generating APs and CDs for CPCH transmission may be limited for each corresponding CPCH transmission. have. In such a case, the following items should be informed by the upper layer before the "CPCH access procedure" for CPCH transmission starts.

Available AP # s, APSC # m, CD-APSC # m, CPCH subchannel group, MSC # n, etc .;

In this case, the concept of an access class (ASC) given in an upper layer may be applied to transmit the corresponding CPCH. In this case, the upper layer should inform the following matters defined according to each ASC before the "CPCH access procedure" (CPCH access procedure) for CPCH transmission.

Signatures available for each ASC, CPCH code channel group, CPCH subchannel group for each CPCH code channel in the CPCH code channel group, and so on.

Here, the "CPCH code-channel group" means a total of 4 (= ) Means a set consisting of several "CPCH code channels", and a "CPCH sub-channel group" means a set consisting of several of all CPCH subchannels.

Each CPCH code channel grasps definition information about subchannels belonging to it. That is, four CPCH code channels have definition information on CPCH subchannels belonging to each of them and an access slot corresponding thereto. Definitions of CPCH subchannels belonging to a CPCH code channel and an access slot corresponding thereto may be different or the same according to CPCH. FIG. 6A illustrates an example in which definitions of CPCH subchannels belonging to each CPCH code channel and corresponding access slots are the same for all CPCH code channels, and utilizes the existing RACH subchannel definition shown in FIG. 4. 6B and 6C show examples of a case in which CPCH subchannels belonging to each CPCH code channel and an access slot corresponding thereto are defined for the CPCH code channel, respectively.

When the terminal intends to transmit the CPCH through PCPCH, if it teaches the codes and signatures available in the upper layer for the CPCH transmission, the layer 1 (physical layer) can use the available signatures (or belonging to the given ASC) and the access slot. Randomly select one signature and one access slot.

Then, the AP is transmitted according to a predetermined procedure. At this time, the AP uses the PCPCH access preamble scrambling code determined by the selected signature and the selected slot. That is, if the selected access slot is an access slot belonging to "Code-channel # m", the corresponding AP uses APSC # m belonging to "Code-channel # m".

At this time, the base station decodes the signatures used in the received AP and the types of AP # s and APSC # m, and informs the terminal of the availability of them using the APAICH. If an acknowledgment signal is found on the AP-AICH, the UE transmits the CD again to determine whether the collision occurs. In this case, the CD randomly selects one signature and one access slot among the available signatures (or belonging to a given ASC) and access slots, and the selection scheme is similar to that of AP transmission.

Thereafter, the base station informs the terminal of the collision information through the CD-AICH. At this time, the AP-AICHs and the CD-AICHs commonly use the same downlink scrambling code. In addition, all kinds of AICHs use different OVSF codes as channelization codes. That is, AP-AICH # m and its channelization code Has a 1: 1 correspondence, CD-AICH # m and its channelization code Fig. 1 is also in a correspondence relationship. And, random Wow Are different.

Alternatively, AP-AICHs commonly use the same one downlink scrambling code, and CD-AICHs may use the same one downlink scrambling code in common. However, at this time, the downlink scrambling code used by the AP-AICHs and the downlink scrambling code used by the CD-AICHs must be different. In addition, all AP-AICHs use different OVSF codes as channelization codes, and all CD-AICHs use different OVSF codes as channelization codes.

That is, AP-AICH # m and its channelization code Has a 1: 1 correspondence, CD-AICH # m and its channelization code Fig. 1 is also in a correspondence relationship. However, random Wow May be the same or different. In the following, the first method is assumed. That is, the AP-AICH and the CD-AICH use the same scrambling code and different kinds of channelization codes.

If both the transmitted AP and CD are approved, the terminal determines the PCPCH message partial scrambling code MSC # n determined by the channelization code of FIG. 2B and the signature AP # s and APSC # m approved by the AP. Is determined by

--------------- (Eq. 21)

For the AP and CD transmitted by the terminal through the above process, the base station informs whether the AP is allowed through the AP-AICH and the CD-AICH, respectively. If = 1, it is only necessary to inform whether the signature transmitted by the terminal is authenticated. However, the existing AP-AICH and CD-AICH may be used. If 2 or more, information on whether the signature is reused (that is, whether or not the PCPCH scrambling code used is authenticated) should also be informed.

To this end, AP-AICH and CD-AICH are each R (= ) Is required. That is, when two or more terminals transmit an AP for CPCH transmission, APs using different PCPCH access preamble scrambling codes are informed of their approval using independent AP-AICHs. That is, whether to approve the AP using the PCPCH access preamble scrambling code APSC # m is indicated through AP-AICH # m.

Similarly, when two or more terminals transmit CDs for CPCH transmission, CDs using different PCPCH CD access preamble scrambling codes are notified using independent CD-AICHs, respectively. That is, whether or not to approve the CD using the PCPCH CD access preamble scrambling code CD-APSC # m is reported through CD-AICH # m. In this case, it is assumed that each AICH uses the same downlink scrambling code and different OVSF codes. In this case, for convenience of design, SFs of all AICHs may be the same. In other words, = ego, = to be. In the following, R = 4, = , = Assume that

7A and 7B illustrate a method of transmitting 4 (= R) AP-AICHs and CD-AICHs by a base station. In Figure 7 The relationship between k _m and AP-AICH # m The relationship between k _m and CD-AICH # m can be arbitrarily determined, and FIGS. 8A and 8B show two possible examples when SF = 256. In FIG. 7, "S / P" means serial / parallel conversion, and { } Is a weight adjusting the transmission power ratio for each AP-AICH # m, { } Is a weight for adjusting the transmission power ratio for each CD-AICH # m, {APG, CDG} is a weight for setting the amount of transmission power of the entire AICH. These can be used together or separately. In Figures 7a and 7b Means the same downlink scrambling code shared by all AICHs.

Each AICH structure can be arbitrarily determined, and the use of one structure makes all system designs convenient. 9 illustrates a case where all AICHs (ie, AP-AICH # 0 to AP-AICH # 3 and CD-AICH # 0 to CD-AICH # 3) use the same structure, and R = 4 and SF = 256. It is shown as. In Figure 9 Is expressed by the following expression (22).

here, Has a value of {+1, -1, 0}, and these values mean an Acquisition Indicator (AI) for the signature AP # s used for the AP using APSC # m in the case of AP-AICH # m. In the case of CD-AICH # m, this means the AI for the signature AP # s used in the CD using the CD-APSC # m. At this time, Is defined as in FIG. 10.

As described in detail above, the present invention provides efficient physical channel allocation when a CPCH has an extra uplink scrambling code among uplink channels used for transmitting data to a base station by a terminal in a 3GPP system, which is one of the next generation mobile communication standards. By enabling this, there is an effect of improving resource utilization of the CPCH.

In addition, in the 3GPP system, which is one of the next generation mobile communication standards, when the CPCH has an extra uplink scrambling code among the uplink channels used for transmitting data to the base station, the AICH can be used efficiently and economically. .

In addition, when the uplink shared channel of other next-generation mobile communication systems needs to consider a reuse factor, it is possible to efficiently allocate a physical channel, thereby improving resource utilization of the shared channel. .

Claims (13)

In case of allocating 16 signature AP # s (s = 0,…, 15) and x "PCPCH scrambling codes" per cell in consideration of PCPCH reuse in a mobile communication system, x PCPCH scrambling codes are allocated. A PCPCH scrambling code belonging to y "CPCH code channels" and belonging to each CPCH code channel is used for the "PCPCH message partial scrambling code," and two of them are selected to "PCPCH access preamble scrambling code" and "PCPCH." CD access preamble scrambling code ". The method according to claim 1, wherein when x = 64, y = 4 and four CPCH code channels (Code-channel # 0 to Code-channel # 3) are generated, and Code-channel # m is 16 PCPCH scrambling codes. Physical channel allocation method of a mobile communication system, characterized in that having a. The method of claim 1, wherein when the 16 signatures and x “PCPCH scrambling codes” are allocated per cell in consideration of reuse of the PCPCH, the terminal allocates one of the 16 signatures and the corresponding cell in order to receive the PCPCH. The physical channel allocation method of the mobile communication system, characterized in that for transmitting the access preamble using any one of the "PCPCH access preamble scrambling code." The method of claim 1, wherein when 16 signatures and x “PCPCH scrambling codes” are allocated per cell in consideration of reuse of PCPCH, the terminal allocates one of the 16 signatures and the corresponding cell to receive the PCPCH. The physical channel allocation method of the mobile communication system, characterized in that for transmitting the CD preamble using any one of the "PCPCH CD access preamble scrambling code." The method according to any one of claims 1 to 4, wherein the signature that the terminal can use at the AP (or CD) for CPCH transmission and the PCPCH access preamble scrambling code (or PCPCH CD access preamble scrambling code) are transmitted according to the CPCH. The physical channel allocation method of the mobile communication system, characterized in that determined by the upper layer for. The terminal of claim 1, wherein when the transmitted AP and CD are approved by the base station, the terminal transmits its message using the PCPCH message partial scrambling code MSC # n, and MSC # n is the same as the APSC # m used in the AP. A physical channel allocation method of a mobile communication system, which is uniquely determined by AP # s. For the AP and CD transmitted by the terminal, the base station notifies whether the grant is allowed through several AP-AICH and CD-AICH, and the number of AICH is determined by the number of PCPCH scrambling codes assigned to the corresponding cell. Physical channel allocation method of the mobile communication system. The method of claim 7, wherein four CPCH code channels (Code-channel # 0 to Code-channel # 3) are provided with four AP-AICHs and CD-AICHs for the AP using APSC # m. The authentication is determined by AP-AICH # m, and the authentication of a CD using CD-APS # m is determined by CD-AICH # m. The mobile communication system of claim 8, wherein the APSC # m and the AP-AICH # m have a 1: 1 correspondence, and the CD-APSC # m and the CD-AICH # m have a 1: 1 correspondence. Physical channel allocation method. The mobile communication method of claim 7, wherein the AP-AICHs and the CD-AICHs use the same downlink scrambling code in common, and all kinds of AICHs use different OVSF codes as channelization codes. How the system allocates physical channels. 11. The method of claim 10, wherein AP-AICH # m and its channelization code. Has a 1: 1 correspondence, CD-AICH # m and its channelization code Fig. 1 is in a correspondence relationship, and arbitrary With random The physical channel allocation method of the mobile communication system, characterized in that not equal to each other. The method of claim 7, wherein the AP-AICHs commonly use the same downlink scrambling code, and the CD-AICHs use the same downlink scrambling code in common. Physical channel allocation method. 13. The method of claim 12, wherein AP-AICH # m and its channelization code. Has a 1: 1 correspondence, CD-AICH # m and its channelization code Physical channel assignment method of the mobile communication system, characterized in that the correspondence of 1: 1.