KR20040017134A - Method for controlling dsch transmitting power in a mobile radio communication system - Google Patents

Abstract

PURPOSE: A method for controlling a DSCH(Downlink Shared CHannel) transport power in a wireless mobile communication system is provided to secure the performance of the DSCH and efficiently use the power by showing a primary cell judgement standard. CONSTITUTION: A UE(User Equipment), which occupies a DSCH provided from a node B, measures a level of a transmitted uplink signal. If the level of the uplink signal is higher than a reference value, the node B compares a cell ID code of the node B with a primary cell ID code received through the uplink signal. If the cell ID code of the node B is identical to the primary cell ID code, the node B controls a transport power of the DSCH occupied by the UE on the basis of a transport power standard when the node B is a primary cell.

Description

TECHNICAL FOR CONTROLLING DSCH TRANSMITTING POWER IN A MOBILE RADIO COMMUNICATION SYSTEM}

The present invention relates to a method and apparatus for controlling the transmission power of a downlink shared channel in a mobile communication system. More specifically, the present invention relates to a method of controlling a transmission power of a downlink shared channel occupied by a corresponding mobile terminal according to one primary terminal selecting a primary cell among communicating base stations. In particular, DSCH transmission power control of a base station transmitting a DSCH for transmission power control of a downlink shared channel (DSCH) of an asynchronous IMT-2000 standard (UMTS) system of a third generation mobile communication standardization group (3GPP) The present invention relates to a method for controlling downlink shared channel transmission power in a wireless mobile communication system capable of improving a transmission performance of a DSCH by optimizing a criterion of whether a primary cell is used for the DSCH.

UMTS (Universal Mobile Telecommunications System) is a third generation mobile communication system that evolved from the Global System for Mobile Communications (GSM) system, which is a European second generation mobile communication standard.The GSM Core Network and Wideband Code Division Multiple Access (WCDMA) It aims to provide better mobile communication service based on wireless access technology.

Here, the first generation mobile communication refers to the analog method, the second generation mobile communication means the evolution to the digital method, and the third generation method is commonly called IMT-2000, which means a breakthrough in communication capability.

And in December 1998, for the international standardization work of UMTS, national or national standards-setting bodies such as ETSI in Europe, ARIB / TTC in Japan, T1 in the US and TTA in Korea were established by The Third Generation Partnership Project (hereinafter abbreviated as 3GPP) is formed, and through this 3GPP, the detailed specification of UMTS, the European IMT-2000 system, is defined.

In 3GPP, UMTS standardization work is divided into 5 Technical Specification Groups (hereinafter referred to as TSG) in consideration of the independence of network components and their operation for rapid and efficient technology development of UMTS. It is divided. Each TSG is responsible for the development, approval, and management of standards within the relevant areas, among which the Radio Access Network (hereinafter, abbreviated RAN) group (TSG-RAN) is the WCDMA access technology (asynchronous) in UMTS. Develop specifications for the functionality, requirements, and interfaces of the UMTS Terrestrial Radio Access Network (hereinafter referred to as UTRAN), a new radio access network to support CDMA).

The TSG-RAN Group is again composed of a Plenary Group and four Working Groups. Working Group 1 (WG1) develops standards for the Physical Layer (WG2), while the second Working Group (WG2) works with the Data Link Layer (2nd Layer) and Network Layer (WG1). Role of the third tier). In addition, the third operation group defines standards for interfaces between base stations, radio network controllers (hereinafter referred to as RNCs) and core networks in the UTRAN, and the fourth operation group relates to radio link performance. Discuss requirements and requirements for radio resource management.

1 is a diagram illustrating a schematic structure of a radio access network (UTRAN) of an IMT-2000 system according to a 3GPP standard to which the present invention and the present invention are applied.

Referring to FIG. 1, the UTRAN 110 is composed of one or more Radio Network Sub-systems (hereinafter, abbreviated as RNS) 120 and 130, and each RNS 120 and 130 is one RNC 121 and 131. And one or more base stations (Node Bs) 122, 123, 132, and 133 managed by the RNCs 121 and 131. The RNC 121 and 131 are connected to a Mobile Switching Center (MSC) 141 for circuit switched communication with a GSM network, and SGSN (for packet switched communication with a General Packet Radio Service (GPRS) network). Serving GPRS Support Node) 142.

The base station (Node B) 122, 123, 132, 133 is managed by the RNC (121, 131) and receives information from the physical layer of the mobile station 150 in the uplink, and transmits data in the downlink to the mobile station 150, Mobile station) and serves as an access point of the UTRAN to a mobile station transmitting to the mobile station. The RNCs 121 and 131 are in charge of allocating and managing radio resources. The RNC, which is responsible for the direct management of the base station Node B, is called a control RNC (CRNC), and is in charge of managing a common radio resource. The place that manages dedicated radio resources assigned to each mobile station is called a serving RNC (SRNC). The control RNC and the responsible RNC may be the same, but when the mobile station moves out of the area of the responsible RNC to the area of another RNC, the control RNC and the responsible RNC may be different. The various components in the UMTS network can be in different locations, so an interface is needed to connect them. The base station Node B and the RNC are connected by an Iub interface, and the RNC is connected through an Iur interface. The interface between the RNC and the core network is called Iu.

Figure 2 shows the structure of the interface protocol of the 3GPP radio access network standard for the mobile station and the network to connect wirelessly over the air.

Referring to FIG. 2, the radio access interface protocol consists of a physical layer (PHY), a data link layer, and a network layer horizontally, and a control plane for transmitting a control signal vertically. And a user plane for transmitting data information. Here, the user plane is an area in which traffic information of the user is transmitted, such as voice or IP packet transmission, and the control plane is an area in which control information is transmitted, such as interface or network maintenance and management of a network.

The protocol layers of FIG. 2 are based on the lower three layers of the Open System Interface (OSI) reference model, which is well known in the communication system, and includes the first layer L1, the second layer L2, It may be divided into a third layer (L3).

The first layer L1 serves as a physical layer (PHY) for the air interface, and a transport channel with a medium access control layer (hereinafter referred to as MAC) layer on the upper layer. It is connected through the channels and transmits the data delivered to the physical layer through the transport channel to the receiver using various coding and modulation methods suitable for the wireless environment.

The transport channel existing between the physical layer (PHY) and the MAC layer is a dedicated transport channel and a common transport depending on whether the mobile station is exclusively available or shared by multiple mobile stations. It is divided into channels (Common Transport Channel).

The second layer L2 serves as a data link layer, and enables various mobile stations to share radio resources of the CDMA radio network. The second layer (L2) is the MAC layer, Radio Link Control (hereinafter referred to as RLC) layer, Packet Data Convergence Protocol (hereinafter referred to as PDCP) layer, and broadcast / multicast control (Broadcast / Multicast Control; hereinafter abbreviated as BMC) is divided into layers.

The MAC layer transfers data through an appropriate mapping relationship between logical channels and transport channels. Logical channels are provided with various logical channels according to the type of information transmitted to the channels connecting the upper layer and the MAC layer. In general, a control channel is used for transmitting control plane information and a traffic channel is used for transmitting user plane information.

The RLC layer constructs an appropriate RLC PDU suitable for transmission by the segmentation and concatenation function of the RLC SDUs transmitted from the upper layer, and performs an automatic repeat request for retransmission of the lost RLC PDU during transmission. ARQ) function can be performed. The RLC SDU or RLC descended from the upper layer operates in three ways: transparent mode, unacknowledged mode, and acknowledgment mode, depending on the method of processing the RLC SDU from the upper layer. There is an RLC buffer for storing PDUs.

In general, a transmission service of user data provided to a higher layer by a second layer L2 in a user plane is defined as a radio bearer (RB), and is defined by a second layer L2 in a control plane as a higher layer. The transmission service of the control information provided as is defined as a signaling radio bearer (SRB).

In addition, as shown in FIG. 2, in the case of the RLC layer and the PDCP layer, several entities may exist in one layer. This is because one mobile station has several radio carriers, and generally only one RLC entity and PDCP entity are used for one radio carrier. Entities of the RLC layer and the PDCP layer may perform independent functions in each layer.

The RRC layer located at the bottom of the third layer L3 is defined only in the control plane, and is responsible for controlling transport channels and physical channels in connection with setting, resetting, and releasing radio carriers. In this case, the radio carrier setup (RB setup) refers to a process of defining characteristics of a protocol layer and a channel necessary for providing a specific service and setting each specific parameter and operation method. It is also possible to transmit control messages transmitted from a higher layer through an RRC message.

On the other hand, there is only one dedicated transport channel (DCH), but the common transport channel (Common Transport Channel) is divided into several types, of which the channel for transmitting unpredictable data As a downlink shared channel (hereinafter referred to as DSCH).

FIG. 3 is a diagram illustrating a configuration of a downlink shared channel (DSCH) according to the 3GPP standard. The downlink shared channel (DSCH) is composed of a radio frame of 10 ms, and is shared and used by different users every frame. Can be. This may be possible by allowing multiple users to allocate one node per frame from a channelization code for a downlink shared channel (DSCH).

On the other hand, although the downlink shared channel (DSCH) is shared by multiple users, it can be used only by one user at a particular moment. Therefore, the downlink shared channel DSCH occupied by a specific mobile station MS is controlled by the mobile station occupying the channel.

Multiple users can be shared by multiple users by assigning one node per frame in the root channelization code for the DSCH. That is, the DSCH is a code multiplexing and time multiplexing channel shared by multiple users. Thus, the DSCH occupied by a specific mobile station (MS) performs power control in association with the occupied user.

In the code division multiple access (CDMA) scheme, users are identified by a root channelization code. For example, when spreading rate (SF) = 4/8/15/32/64, each channelization code is 4/8/16. There are / 32/64. The high spreading channelization code is made by branching from the low spreading channelization code, wherein the low spreading channelization code is called mother code, and the smallest spreading rate among the mother codes is called root channelization code. . That is, when the root channelization code is set for the downlink shared channel (DSCH), a channelization code having a high spreading rate can be allocated therefrom.

In general, in one cell (or one base station), the downlink shared channel (DSCH) may be said to operate in association with a dedicated channel (DCH). That is, the mobile station occupying the downlink shared channel (DSCH) necessarily has a dedicated channel (DCH). Referring to general power control, the mobile station (MS) measures the power of the dedicated channel (DCH) transmitted from the base station, and generates a transmit power control (TPC) command therefrom and transmits it to the base station. Then, the base station updates the power of the dedicated channel (DCH) based on the transmission power control command. In addition, the base station may update the power of the downlink shared channel (DSCH) in association with the updated dedicated channel (DCH) power. The mobile station does not separately generate a transmit power control (TPC) command for the downlink shared channel.

In this way, the power of the dedicated channel (DCH) and the power of the downlink shared channel (DSCH) are linked to operate. That is, as described above, the downlink shared channel (DSCH), which is a downlink channel of the mobile communication system according to the 3GPP standard method, is a shared channel used by several users by dividing time and codes. This is because it is a channel. Meanwhile, one per user using the downlink shared channel (DSCH) to periodically transmit a pilot field required for fast power control and send control information for the downlink shared channel (DSCH). A dedicated channel (DCH) is used in combination, which is referred to as an associated dedicated channel. Accordingly, since the downlink shared channel (DSCH) is operated in association with the associated dedicated channel assigned to each user (or mobile station), data transmission from the base station to each mobile station is performed through the downlink shared channel (DSCH). It can be made smoothly.

4 is a diagram illustrating a configuration of a dedicated channel (DCH) and a related physical channel (DPCH) associated with the 3GPP standard. As described above, the dedicated channel (DCH) refers to a transport channel existing between the physical layer (PHY) and the MAC layer, and the dedicated physical channel (DPCH) refers to a transmitting side physical layer (PHY) and a receiving side. It means a physical channel existing between physical layers (PHY).

Referring to FIG. 4, the dedicated physical channel DPCH includes a radio frame having a frame period T _f of 10 ms, and includes 15 slots Slot # 0 to Slot # 14 for each radio frame. Here, one slot length (T _slot ) is 2560 chips. In addition, the Dedicated Physical Data Channel (DPDCH) and Dedicated Physical Control Channel (DPCCH) are alternately interposed in the Dedicated Physical Channel (DPCH). In the dedicated physical channel DPCH, N _data1 bits of data Data1 are loaded on the first dedicated physical data channel DPDCH from the left, and the TPC (N _TPC bit) and TFCI are loaded on the first dedicated physical control channel DPCCH. (N _TFCI bit) may be carried. In addition, the next dedicated physical data channel DPDCH may carry N _data2 bits of data Data2, and the second dedicated physical control channel DPCCH may carry N _pilot bits of pilot signals. Here, the TFCI (Transport Format Combination Indicator) field contains information on a channel currently being transmitted. For example, the TFCI field may transmit information on the amount of data transmitted in the current radio frame, a coding method, and the like.

When data of a user is transmitted to one user through a downlink shared channel (DSCH), the downlink shared channel (DCH) together with information on the dedicated channel (DCH) by the TFCI field of the dedicated physical control channel (DPCCH). DSCH) information should be transmitted at the same time. To this end, the TFCI field may divide the bits included in the TFCI field transmitted per slot into two, one half of which may be used for a dedicated channel (DCH) and the other half for a downlink shared channel (DSCH).

Two methods may exist as a method for transmitting information about a dedicated channel (DCH) and a downlink shared channel (DSCH). That is, in the first method, the TFCI information (TFCI1) for the dedicated channel (DCH) and the TFCI information (TFCI2) for the downlink shared channel (DSCH) have one codeword based on one coding (second order reed muller coding). code word) is formed and transmitted. This is called Logical Split Mode. In the second method, TFCI information (TFCI1) for the dedicated channel (DCH) and TFCI information (TFCI2) for the downlink shared channel (DSCH) are different from each other through the first order reed muller coding. In this case, the bits of the two codewords thus formed are mixed and transmitted. This is called Hard Split Mode. Here, the second method may transmit the TFCI field even when a dedicated channel (DCH) is transmitted by a different radio network controller (RNC). That is, TFCI information (TFCI2) for the downlink shared channel (DSCH) is only transmitted in a part of base stations in the entire radio link.

The transmit power control (TPC) command of the dedicated physical control channel (DPCCH) is a command for power control of an uplink channel, and may use this to change the power of the uplink (or reverse). Using a pilot signal, the state of the channel over which it is transmitted can be measured.

On the other hand, while the dedicated channel (DCH) performs soft handover, the downlink shared channel (DSCH) does not perform soft handover. That is, since DSCH is a channel that is occupied by multiple mobile stations in one cell in time division, data transmission for one mobile station does not occur in two cells at the same time, and when the mobile station moves to another cell, part of the DSCH in another cell is recreated. To occupy. Thus, when the DCH is in soft handover state and the DSCH is only transmitted from one base station, power control needs to be done in a different way. That is, since the DCH evaluates the power of the received signal by combining the powers from several base stations in one mobile station, the downlink shared channel is provided from only one base station because the TPC of the uplink dedicated physical control channel (DPCCH) is generated. As a result, the transmission power control of the downlink shared channel cannot be accurately performed through the power control by the TPC that is determined, made, and transmitted for the DCH as described above. For this reason, the DCH and other power control methods should be applied to the downlink shared channel.

On the other hand, in the system according to the UMTS standard of 3GPP, the Site Selection Diversity Transmit power control (SSDT) signaling is operated in the uplink. The SSDT is a method in which the mobile station determines the main communication counterpart when the mobile station moves between cells, so that the cell (base station) that can communicate with the mobile station becomes an active set and each has a cell identifier. The mobile station determines the primary communication counterpart (primary cell) based on the strength of the received signal and the like and transmits a corresponding cell id code. The base station of the cell belonging to the active set then decodes the transmitted cell identifier code to determine whether it is the primary communication party (primary cell) or secondary communication party (non-primary cell). do. Even when the overall channel situation is poor, in order to avoid the loss of communication due to the fact that the main communication counterpart (primary cell) is not determined, the case of judging as the non-primary cell is strictly limited.

At this time, when it is determined as a non-primary cell, as shown in FIG. 5, when the size of a received signal must be moderately large, and when three conditions are required, the cell identifier value must be different and the puncturing ratio must be small in the compression mode. It is finally judged as a non-primary cell.

More specifically, three conditions are as follows.

1) The magnitude of the signal received from the mobile station by the base station must be greater than or equal to a certain value Q _th .

2) Its cell identifier code must be different from the primary cell code sent from the mobile station.

3) In the case of uplink compressed mode, an appropriate level of puncturing should occur. The appropriate level of puncturing should be below (int) N _id / 3. Where N _id is the length of the cell identifier code. (Int) is the smallest minimum integer operator.

If the two conditions of 1) and 2) are not in the compression mode, and all three conditions are satisfied in the compression mode, the base station determines the nonprimary cell as the primary cell. This is due to the technical characteristics of SSDT. That is, the SSDT transmits a dedicated physical data channel (DPDCH) only to a base station determined as a primary cell. If only a cell (or base station) matching the cell identifier is determined as a primary cell, the channel situation is poor. When a decoding error occurs in a base station of a cell to be determined as a primary cell, all cells (or base stations) in an active set are determined to be non-primary cells, which may cause a situation in which data transmission is not performed. In order to avoid this situation, it is strictly determined that the non-primary cell is a non-primary cell, so that data is not transmitted.

SSDT uplink signaling may be used for transmission power control of a downlink shared channel (DSCH), which is performed by decoding an SSDT identifier code at a base station transmitting a DSCH in an active set. You will decide whether to head. At this time, another base station that does not transmit the DSCH in the active set does not activate the SSDT to control the transmission power of the downlink shared channel (DSCH). The base station determined as primary using the SSDT uplink signaling transmits the signal with the transmission power obtained by subtracting the transmission power of the DSCH by the power offset corresponding to the primary cell. This is transmission power control obtained as a result of identifying the primary cell with the goodness of the channel state.

In the conventional DSCH transmission power control, however, whether the primary / non-primary cell is determined using SSDT uplink signaling is determined. It can degrade performance.

That is, as mentioned above, there are two main cases in which the base station determines itself as the primary cell. The first is the case where the primary channel is judged as the primary cell based on the cell identifier because the actual channel condition is good, and the second is the primary cell to eliminate the problems of SSDT itself due to the poor reliability of the SSDT identifier code decoding due to the poor channel condition. This is the case. In the first case, the power can be efficiently used while guaranteeing the performance of the DSCH. In the second case, there is a problem in that the performance of the DSCH may be degraded.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In the case where the base station determines the primary cell as the primary cell in the downlink shared channel transmission power control, the up channel situation is poor and the primary cell is determined as the primary cell. It is an object of the present invention to provide a method for controlling downlink shared channel transmission power in a wireless communication system in which a primary cell determination criterion can be prevented so as to prevent the loss, thereby ensuring the performance of the downlink shared channel and efficiently using power.

1 is a structure of a wireless access network of an IMT-2000 system according to the 3GPP standard.

2 is a protocol structure of a radio access interface of an IMT-2000 system according to the 3GPP standard.

3 is a diagram illustrating a configuration of a downlink shared channel (DSCH).

4 is a diagram illustrating a configuration of a dedicated physical channel (DPCH).

5 is a flowchart for determining a non-primary cell and a primary cell in uplink in conventional SSDT signaling.

6 is a flowchart illustrating a method of determining a primary cell in DSCH power control according to an embodiment of the present invention.

7 is a flowchart of a signaling procedure for transmission power control of a TFCI field for a DSCH for the present invention.

In order to achieve the above object, a method for controlling downlink shared channel power in a wireless communication system according to the present invention,

In controlling the transmission power of the downlink shared channel in the base station,

Measuring a magnitude of an uplink signal transmitted from a mobile station occupying a downlink shared channel provided by the base station;

Comparing the primary cell identifier code received through the uplink signal with the base station's own cell identifier code when the signal has a predetermined size or more;

When the cell identifier codes are the same, the base station controls the transmission power of the downlink shared channel occupied by the mobile station based on the transmission power when the base station is the primary cell.

Further, even if the signal is small or the cell identifier code is different, the base station controls the transmission power of the downlink channel occupied by the mobile station based on the transmission power when the base station is a non-primary cell. It is characterized by consisting of steps.

Preferably, the size of the signal is based on the size of the pilot field signal of the uplink signal.

Preferably, when it is determined that the cell of the base station is a primary cell, the corresponding transmission power offset value is determined by the radio network controller and is transmitted to the corresponding base station.

In addition, the transmission power reference may be applied to the transmission power control of the TFCI field of the hard split mode for the downlink shared channel.

Referring to the accompanying drawings, a method for controlling downlink shared channel power in a wireless communication system according to an exemplary embodiment of the present invention is as follows.

Referring to FIG. 6, in transmission power control of a downlink shared channel, a primary cell is determined using SSDT uplink signaling.

In determining the primary cell for the transmission power control of the downlink shared channel, the size of the received signal received from the mobile station is considered. In the case of a typical SSDT, the size of the received signal of the mobile station may not be higher than an appropriate level. In this case, an error occurs during the decoding process of the SSDT identifier. In this case, all the base stations in the active set may be declared as non-primary, and thus, when the received signal is not at an appropriate level, it is always regarded as primary.

However, when the primary cell is determined to be applied to the transmission power control of the downlink shared channel, when the received signal is below an appropriate level, it is necessary to determine the non-primary cell to increase the transmission power.

In the transmission power control method of the downlink shared channel of the present invention, the base station must satisfy both the condition that its cell identifier code must be the same as the primary cell identifier code transmitted from the mobile station and the condition that the size of the received signal must be greater than or equal to a predetermined value. The primary cell is determined, and if any one is not satisfied, the primary cell is determined to be a non-primary cell to control the transmission power.

In this way, the base station determined as the primary cell with respect to the transmit power of the DSCH by using the SSDT uplink signaling subtracts the transmit power of the DSCH by the transmit power offset corresponding to the primary cell relative to the reference value. This is considered that the channel condition is good, and the offset value may be changed according to the magnitude of the received signal.

On the other hand, the base station determined as the non-primary cell for the transmission power of the DSCH is added to the transmission power of the TFCI (transmission format combination indicator) field of the DCH by a certain amount of transmission power offset to transmit. In general, the transmission power of the TFCI field of the DCH is transmitted by adding the transmission power offset of a predetermined size to the transmission power of the data field (DPDCH) of the DCH.

Next, transmission power control of the TFCI field will be described.

The TFCI information (TFCI1) for the dedicated channel (DCH) and the TFCI information (TFCI2) for the downlink shared channel (DSCH) are formed with different codewords through respective first order reed muller coding. When the bits of the codewords are mixed and transmitted, this is called a hard split mode. In the hard split mode, the TFCI field for the downlink shared channel may be transmitted even when the dedicated channels DCH are respectively transmitted by different radio network controllers (RNCs). That is, TFCI information (TFCI2) for the downlink shared channel (DSCH) is supported by a part of base stations in the entire radio link.

Here, as a method for transmitting information about the dedicated channel (DCH) and the downlink shared channel (DSCH), the hard split mode is a TFCI information (TFCI1) and a downlink shared channel for the dedicated channel (DCH) TFCI information (TFCI2) for the (DSCH) is a case where different codewords are formed through respective codings (first order Reed Muller coding), and bits of the two codewords thus formed are mixed and transmitted. The above-described downlink shared channel (DSCH) transmission power control criteria may be applied to the downlink shared channel (DSCH) TFCI hard split mode transmission power control.

Meanwhile, the TPC command carried in the downlink control channel is a command for power control of an uplink channel, and the uplink (or reverse) power may be changed using the command. The power of the channel may be measured using a pilot.

In addition, when it is determined as the primary cell, the corresponding transmit power offset value may be signaled from the radio network controller to the corresponding base station for application.

That is, when it is determined as the primary cell, the corresponding transmit power offset value includes an update message of radio link parameters when establishing a radio link between the control station and the base station Node B as shown in FIG. 7. Signaled by inclusion in a control frame. It is always intended to use the TFCI power offset (PO) indicated in the NBAP and RNSAP messages of the control plane when initially establishing a radio link, regardless of the mobile station's movement or the number of radio links transmitting TFCI2. If it is determined as a primary cell, the corresponding TFCI Power Offset value is transmitted using a Node B Application Part (NBAP) and a Radio Network Subsystem Application Part (RNSAP) signaling message in the control plane to transfer the corresponding TFCI Power Offset value between the control station and the base station or between the control stations. Sent when establishing a radio link.

According to the method of the present invention, the downlink shared channel transmit power can be prevented in the case where the base station determines the primary cell due to poor channel conditions among the conditions when the base station determines its own cell as the primary cell in downlink shared channel transmit power control. By separately determining the primary cell in the control, a downlink shared channel transmission power control method can be provided in a wireless communication system that can efficiently use power while ensuring the performance of the downlink shared channel.

Claims (10)

In controlling the transmission power of the downlink shared channel in the base station, Measuring a magnitude of an uplink signal transmitted from a mobile station occupying a downlink shared channel provided by the base station; Comparing the primary cell identifier code received through the uplink signal with the base station's own cell identifier code when the signal size is larger than a reference value; If the cell identifier codes are the same, the base station controls the transmission power of the downlink channel occupied by the mobile station based on the transmission power when the primary cell is the downlink sharing in the wireless mobile communication system. Channel power control method. The method of claim 1, wherein the transmission power of the downlink shared channel is to subtract a constant transmission power offset from a reference power. 3. The method of claim 2, wherein the reference power adds a constant power offset to the TFCI transmit power of the dedicated channel of the associated mobile station. The method of claim 2, wherein the constant transmission power offset value is determined by a wireless network controller and transmitted to a corresponding base station. In controlling the transmission power of the downlink shared channel in the base station, Measuring a magnitude of an uplink signal transmitted from a mobile station occupying a downlink shared channel provided by the base station; Comparing the primary cell identifier code received through the uplink with the cell identifier code of the base station itself; The base station controls the transmission power of the downlink shared channel occupied by the mobile station on the basis of the transmission power when the signal is not a certain size or the cell identifier code is not the same. Downlink shared channel power control method in a wireless mobile communication system, characterized in that the loss. 6. The method of claim 5, wherein the transmission power reference when the primary cell is not adds a constant transmission power offset to the TFCI transmission power of the dedicated channel of the associated mobile station. In transmitting a TFCI field for the downlink shared channel in the base station, Measuring a magnitude of an uplink signal transmitted from a mobile station occupying a downlink shared channel provided by the base station; Comparing the primary cell identifier code received through the uplink signal with the base station's own cell identifier code when the signal has a predetermined size or more; If the cell identifier code is the same, the base station comprises the step of controlling the transmission power of the TFCI field for the downlink channel occupied by the mobile station based on the transmission power when the base station itself is a radio; A method for controlling power of a TFCI field for a downlink shared channel in a mobile communication system. 8. The method of claim 7, wherein the TFCI field for the downlink shared channel is a TFCI field for the hard split mode for the downlink shared channel. In transmitting a TFCI field for the downlink shared channel in the base station, Measuring a magnitude of an uplink signal transmitted from a mobile station occupying a downlink shared channel provided by the base station; Comparing the primary cell identifier code received through the uplink with the cell identifier code of the base station itself; If the signal is less than a certain size or the cell identifier code is not the same, the base station controls the transmit power of the TFCI field for the downlink channel occupied by the mobile station based on the transmit power when it is not a primary cell. The method of controlling the power of the TFCI field for the downlink shared channel in a wireless mobile communication system, characterized in that it comprises a step. 10. The method of claim 9, wherein the TFCI field for the downlink shared channel is a TFCI field for the hard split mode for the downlink shared channel.