KR100459163B1 - Control method for common packet channel and channel structure - Google Patents

Abstract

The present invention relates to the next generation mobile communication, and more particularly, to a method of controlling a common packet channel and a channel structure therefor that are suitable for efficiently controlling a common packet channel (CPCH) according to a system situation. In the present invention as described above, the system transmits a specific pattern of bits, which are already promised in slot units, to the mobile station for emergency interruption of message transmission through the common packet channel, and also for higher layer control for the common packet channel. Transmit control command transmitted in frame by frame. In this case, the bit of the specific pattern configures and transmits a CPCH Emergency Sop (CES) field on a downlink dedicated physical channel (DL-DPCH), and the control command of the upper layer transmits a CDC to a downlink dedicated physical channel (DL-DPCH). Configure and transmit the (CPCH Down link Control) field. Therefore, when the control method of the common packet channel according to the present invention is applied, there is an effect that the effective control of the common packet channel (CPCH) can be performed according to the system situation.

Description

Control method for common packet channel and channel structure for it {Control method for common packet channel and channel structure}

The present invention relates to the next generation mobile communication, and more particularly, to a method of controlling a common packet channel and a channel structure therefor that are suitable for efficiently controlling a common packet channel (CPCH) according to a system situation.

According to the specification of the 3rd Generation Common Project (3GPP), an organization that currently establishes the IMT-2000 standard, the Common Packet Channel (CPCH) and the downlink channels (AP-AICH, CD-) controlling the use of this channel. AICH, DL-DPCCH) is configured as shown in Figs. 1A to 1B. That is, the common packet channel status indication channel (CPCH Status Indicator Channel, hereinafter abbreviated as CSICH) for transmitting usable information of each physical common packet channel (hereinafter, referred to as PCPCH) message portion provided by the base station. (Not shown), an access preamble (AP) portion requesting the use of a specific PCPCH channel, an access preamble-acquisition indication channel (AP-AICH) for transmitting a response to the access preamble (AP), Collision Detection Preamble (CD-P) portion for collision detection and resolution, Collision Detection-Acquisition Indication Channel (CD-AICH) that transmits a response to the Collision Detection Preamble (CD-P) ), A channel allocation-acquisition indication channel (CA-AICH) for transmitting information of a channel to be allocated, and a 0 or 8 slot length power control preamble for setting a transmission power level before data transmission. A preamble (PC-P) portion, a downlink dedicated physical control channel (DL-DPCCH) transmitted on a dedicated physical channel (DPCH) to provide closed loop power control, and a PCPCH message portion transmitting user packet data. The PCPCH message portion is divided into a PCPCH message data portion and a PCPCH message control portion. The CSICH, AP-AICH, CD-AICH, CA-AICH, and DL-DPCCH are downlink channels for transmitting information from the base station to the terminal, and PCPCH is uplink channels for transmitting information from the terminal to the base station. CPCH refers to a connection path between the physical layer (Layer 1) and the data link layer (Layer 2), PCPCH refers to a connection path between the corresponding physical layer.

The procedure for allocating a common packet channel (CPCH) having the configuration as described above will now be described. This common packet channel (CPCH) allocation procedure has seven steps. However, the base station may have two types depending on whether a channel allocation-acquisition indication channel (CA-AICH) is transmitted.

Referring first to FIG. 1A, as a first step, a base station always broadcasts channel information of common packet channels that it services, that is, whether each channel is available to a mobile station through a CSICH. This CSICH is transmitted periodically, and the channel information transmitted by the CSICH is periodically updated. Then, the mobile station wishing to transmit the packet on the common packet channel (CPCH) may first receive the CSICH to provide its desired data rate and check whether there is a common packet channel (CPCH) available.

If there is a common packet channel (CPCH) available according to the check result, the mobile station selects one channel from the common packet channel (CPCH).

As a second step, a mobile station intending to use a common packet channel (CPCH) transmits an access preamble (AP) to a base station. At this time, the mobile station selects one access preamble signature (AP Signature) and one access slot (AS) and transmits the access preamble (AP) in synchronization with the start of the access slot (AS). In this case, the access preamble signature (AP Signature) selects and transmits the one corresponding to the common packet channel (CPCH) selected in the first step.

As such, the mobile station may use the maximum data rate or minimum spread factor (SF) of the message portion of the common packet channel (CPCH) required to transmit data through the access preamble signature (AP Signature) and the access slot (AS). Notify the base station.

Subsequently, when the acquisition response for the transmitted access preamble (AP) from the base station is not received by a predetermined time, the mobile station repeats the operation of increasing the transmission power of the access preamble (AP) to a threshold number of times. .

As a third step, the base station receives an access preamble (AP) transmitted by the mobile station. At this time, the base station can know the maximum data rate or minimum spread rate (SF) for the common packet channel (CPCH) required by the mobile station. Then, the base station determines whether the mobile station can allocate the common packet channel (CPCH) in consideration of the channel resources and the total traffic amount of the common packet channel (CPCH) it currently has. The base station transmits an ACK signal if a common packet channel (CPCH) can be allocated, and a NAK signal if impossible.

At this time, when transmitting the ACK signal, the base station loads the access preamble signature (AP Signature) of the corresponding mobile station on the acquisition indication channel (AICH) and transmits the signal according to the start time of the access slot (AS). Complement of the access preamble signature (AP Signature) of the mobile station on the acquisition indication channel (AICH) is transmitted according to the start time of the access slot (AS). The ACK signal and the NAK signal become an access preamble-acquisition indication channel (AP-AICH).

In a fourth step, a mobile station receiving an access preamble-acquisition indication channel (AP-AICH) carrying an access preamble signature (AP Signature) transmitted by itself (ie, receiving an ACK signal) may receive a common packet channel (CPCH). In order to reduce collisions, we select one signature from the collision detection signature code set consisting of 16 signatures and apply a collision detection preamble (CD-P) to the base station. send. However, the mobile station receiving the NAK signal retransmits the access preamble (AP) to retry access to the base station.

As a fifth step, the base station selects the strongest reception strength for the collision detection preambles (CD-Ps) arriving at different signatures at the same time, and detects the collision detection preamble signature (CD-P signature). Acquire and transmit on the acquisition indication channel (CD-AICH).

In a sixth step, the mobile station transmits a power control preamble (PC-P) to a base station on a physical channel corresponding to an access preamble signature (AP Signature) selected by the mobile station, and the base station transmits a downlink dedicated physical control. Closed loop power control is performed by transmitting the channel DL DPCCH to the mobile station.

As a seventh step, the mobile station transmits a message on the assigned physical channel, and the base station transmits a downlink dedicated physical control channel (DL DPCCH).

On the other hand, after the seventh step, the base station may stop the transmission of the mobile station message by cutting off the downlink dedicated physical control channel (DL-DPCCH) if a temporary capacity overload occurs in the cell. At this time, if the base station detects that the downlink dedicated physical control channel (DL DPCCH) is not transmitted, the mobile station stops transmitting a message through the common packet channel (CPCH). Then, the physical layer of the mobile station reports an error occurrence to the MAC layer. As described above, the procedure proceeding after the seventh step becomes an emergency stop of message transmission.

The system (i.e., UTRAN) then sends an RLC ACK signal or NAK signal for the received message to the mobile station via the FACH after reception of the message on the common packet channel (CPCH).

In FIG. 1A described so far, the base station does not transmit a channel allocation-acquisition indication channel (CA-AICH). Therefore, the access preamble signature (AP signature) points to a node with a spreading rate of 16 in the orthogonal variable spreading rate code (OVSF) tree.

Meanwhile, FIG. 1B shows another form of common packet channel (CPCH) allocation procedure.

Referring to FIG. 1B, steps 4 to 4 have the same procedure as FIG. 1A. However, in the fifth step, the base station selects the strongest reception strength for the collision detection preambles CD-Ps arriving at different signatures at the same time, and collides the selected collision detection preamble signature CD-P signature. It is carried on the detection-acquisition indication channel (CD-AICH). In addition, the base station transmits a channel allocation-acquisition indication channel (CA-AICH) including the channel information to be allocated in the form of a signature in the acquisition indication channel (AICH) to the mobile station. In this case, the channel information is a channelization code and a scrambling code of a downlink dedicated physical control channel (DL-DPCCH) and a physical common packet channel (PCPCH). The collision detection-acquisition indication channel (CD-AICH) and the channel allocation-acquisition indication channel (CA-AICH) are transmitted simultaneously.

Thereafter, the mobile station transmits a power control preamble (PC-P) to a physical channel allocated through the signature information of the channel allocation-acquiring indication channel (CA-AICH), and transmits a message. The base station transmits a downlink dedicated physical control channel (DL-DPCCH).

In this procedure as shown in FIG. 1B, the emergency stop process of message transmission is the same as the process described in FIG. 1A, and the procedure of transmitting the ACK signal and the NAK signal of the RLC is also the same.

Meanwhile, the downlink dedicated physical channel (DL-DPCH) used in the process of controlling the use of the common packet channel (CPCH) has a structure as shown in FIG.

Referring to FIG. 2, a downlink dedicated physical channel (DL-DPCH) for controlling the use of a common common packet channel (CPCH) is composed of a downlink dedicated physical data channel (DPDCH) and a downlink dedicated physical control channel (DPCCH). do. Wherein the dedicated physical data channel (DPDCH) in one slot consists of two bits of a first data field and a second data field, and the dedicated physical control channel (DPCCH) comprises two bits of power control command (TPC) and zero bits. It consists of a TFCI field and a 4-bit pilot field. The Dedicated Physical Data Channel (DPDCH) and Dedicated Physical Control Channel (DPCCH) are transmitted at 2560 chip rates for one slot. At this time, 15 slots are one radio frame.

In the conventional downlink dedicated physical channel (DL-DPCH), energy is not transmitted in the first data field and the second data field. That is, dummy data is transmitted on the downlink. Accordingly, the downlink dedicated physical data channel (DL-DPDCH) is not used, and only the downlink dedicated physical control channel (DL-DPCCH) is transmitted.

However, in consideration of the conventional allocation procedure of the common packet channel (CPCH), the mobile station that detects the loss of the downlink dedicated physical channel (DL-DPCH) continues to transmit the signal for a predetermined time. Raised.

Therefore, as described above, when an emergency stop of message transmission occurs and the base station stops transmitting the downlink dedicated physical control channel (DL-DPCCH), the mobile station determines the downlink dedicated physical control channel (DL-DPCCH). There is a problem that the interference between each signal is increased by continuously increasing the transmission power until the transmission interruption is completely confirmed.

In addition, in the conventional common packet channel (CPCH) allocation procedure, flow control, congestion control, and admission control performed on the common packet channel (CPCH) in Layer 2 or 3 may be performed. No method has been proposed to perform efficiently.

Accordingly, an object of the present invention has been made in view of the above-mentioned problems of the prior art, and a control method of a common packet channel for emergency interruption of message transmission without causing interference between signals in case of cell overload and the same. To provide a channel structure for.

Another object of the present invention is to provide a method for controlling a common packet channel and a channel structure therefor to control the common packet channel according to a system situation.

According to the method feature of the present invention for achieving the above object, the control method of the common packet channel is a system for the message transmission via the first control command or the common packet channel (CPCH) transmitted from the upper layer in accordance with the system situation Any of the second control commands for stopping are mapped to the downlink dedicated physical channel (DL-DPCH) and transmitted. And, when the second command is transmitted, transmits a power control command (TPC) for lowering the power of the mobile station. The mobile station then operates a common packet channel (CPCH) in accordance with each transmitted control command.

Advantageously, the system transmits a first control command transmitted from an upper layer for control of the common packet channel (CPCH) to a transmission type combined identifier (TFCI) field of the downlink dedicated physical channel (DL-DPCH). The downlink dedicated physical channel (DL-DPCH) with a predetermined pattern of bits for a second control command for mapping using a form combining identifier encoding scheme or for stopping a message transmission over the common packet channel (CPCH). Map to. The first control command is transmitted in units of frames through the downlink dedicated physical channel (DL-DPCH), and the second control command is performed for a predetermined slot already established through the downlink dedicated physical channel (DL-DPCH). Is sent.

According to the feature of the channel structure of the present invention for achieving the other object as described above, the downlink dedicated physical channel is a power control command field for power control, and a control command of the upper layer to control the common packet channel (CPCH) The inserted first control command (CDC) field, the second control command (CES) field for stopping message transmission of the mobile station through the common packet channel (CPCH), and a pilot field into which pilot information is inserted. It is composed.

1A to 1B are structural diagrams of a conventional common packet channel (CPCH).

2 is a structural diagram of a conventional downlink dedicated physical channel (DL-DPCH).

3 is a structural diagram of a downlink dedicated physical channel (DL-DPCH) according to a first embodiment of the present invention;

4A to 4B are structural diagrams of a downlink dedicated physical channel (DL-DPCH) according to a second embodiment of the present invention.

5 is a structural diagram of a downlink dedicated physical channel (DL-DPCH) according to a third embodiment of the present invention;

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

According to the present invention, interference between signals of a mobile station does not occur during emergency stop of message transmission through a common packet channel generated according to a system situation. Also, in an upper layer such as layer 2 or 3 according to the system situation, A control method of a common packet channel and a channel structure therefor for transmitting a control command to be transmitted to a mobile station and operating a common packet channel accordingly are proposed.

To this end, in the present invention, a control command for transmitting a specific pattern of bits already promised in slot units for emergency interruption of a message transmission or for controlling a common packet channel (CPCH) in a higher layer in frame units send. Here, the system refers to the UTRAN including the base station.

Accordingly, in the present invention, a CPCH Emergency Sop (CES) field is configured in a downlink dedicated physical channel (DL-DPCH) to transmit the bits of the specific pattern, and the common layer can control the common packet channel (CPCH) in the upper layer. To configure the downlink dedicated physical channel (DL-DPCH) CDC (CPCH Down link Control) field. At this time, CES information is transmitted in units of slots, and CDC information is transmitted in units of frames. Preferably, the CES information is transmitted through a downlink dedicated physical data channel (DL-DPDCH), and the CDC information is inserted into a transmission type combining identifier (TFCI) field of a downlink dedicated physical control channel (DL-DPCCH) and transmitted. do. CDC information is thus inserted into the TFCI field via transport type association identifier (TFCI) encoding. This CDC information may have various structures depending on the number of control commands transmitted per radio frame.

Meanwhile, an integrated structure in which both the CES field and the CDC field are inserted in one slot may be configured. That is, CDC information may be inserted into a TFCI field of a dedicated physical control channel (DPCCH) of one slot, and CES information may be inserted into a data field of a dedicated physical data channel (DPDCH) and transmitted together.

3 is a structural diagram of a downlink dedicated physical channel (DL-DPCH) according to a first embodiment of the present invention.

Referring to FIG. 3, the first embodiment describes a case in which a CPCH Down-link Control (CDC) field is configured to transmit a control command of layer 2 or 3 to a downlink dedicated physical channel (DL-DPCH). The CDC field is inserted in the CDC field and transmitted in units of frames. The CDC field is for quickly transmitting a command of an upper layer controlling an uplink common packet channel (UL CPCH) to the mobile station.

In the present invention, the CDC field is configured in the TFCI field of the downlink dedicated physical control channel (DL-DPCCH). Since this TFCI field consists of 2 bits per slot, the CDC field according to the present invention also consists of 2 bits per slot. Therefore, considering that the radio frame consists of 15 slots, 30 bits of CDC bits are transmitted during one radio frame. At this time, since the 2-bit CDC field is configured in the TFCI field, 0 bits are configured in the first data field of the dedicated cluster data channel (DPDCH).

Here, CDC is used in the same way as TFCI encoding. Therefore, when a 10-bit CDC command is input to the TFCI encoder, the TFCI encoder outputs 30 bits of CDC bits and maps them for one frame. That is, the 30-bit output of the TFCI encoder is mapped to the downlink dedicated physical channel (DL-DPCH) by 2 bits per slot.

Thus, the system can send 1024 common packet channel control commands to the mobile station during one radio frame.

On the other hand, the 10-bit input information constituting the CDC command may be configured in three forms according to the number of the CDC command as follows.

First, the first form is a case of transmitting a control command of one common packet channel (CPCH) per radio frame, and is configured as shown in Table 1 below.

Command Identifier (ID) parameter X bit Y bit

In Table 1, the relationship of X bits + Y bits = 10 bits is established.

At this time, when there is one control command through the CDC field, it is configured as shown in Table 2 below.

parameter 10 bit

The second form is a case of transmitting control commands of two common packet channels (CPCH) per radio frame, and is configured as shown in Table 3 below.

First Command Identifier (ID) First parameter Second command identifier (ID) Second parameter 1st X bit 1st Y bit 2nd X bit 2nd Y bit

In Table 3, the relationship of 1 X bit + 1 Y bit + 2 X bit + 2 Y bit = 10 bit is established.

At this time, when there is one control command through the CDC field, it is configured as shown in Table 4 below.

First parameter Second parameter 1st Y bit 2nd Y bit

At this time, a relationship between the first Y bits + the second Y bits = 10 bits is established.

The third form is a case of transmitting control commands of two common packet channels (CPCH) per radio frame, and is configured as shown in Table 5 below.

First Command Identifier (ID) First parameter ..... Nth instruction identifier (ID) Nth parameter 1st X bit 1st Y bit ..... Nth X bit Nth Y bit

In Table 5, the relationship between the first X bits + the first Y bits + ..... + the n th X bits + the n th Y bits = 10 bits is established.

At this time, when there is one control command through the CDC field, it is configured as shown in Table 6 below.

First parameter ..... Nth parameter 1st Y bit ..... Nth Y bit

At this time, a relationship between the first Y bits + ..... + the nth Y bits = 10 bits is established.

On the other hand, when the CDC command is not transmitted, energy is not transmitted to the CDC field and is transmitted in a power off state.

4A to 4B are structural diagrams of a downlink dedicated physical channel (DL-DPCH) according to a second embodiment of the present invention.

In the second embodiment, a case where a CCHE (CPCHEmergency Stop) field is configured to transmit an emergency stop command of a message transmission through a common packet channel (CPCH) on a downlink dedicated physical channel (DL-DPCH) will be described.

4A illustrates a case where a CES field is configured in a second data field of a dedicated physical data channel (DPDCH), and FIG. 4B illustrates a case where a CES field is configured in a first data field of a dedicated physical data channel (DPDCH). Indicated.

The CES bit according to the present invention is for fast control beyond the control of the common packet channel (CPCH) through the CDC. In particular, the CES bit is a field for emergency stop of message transmission through the common packet channel (CPCH). .

This CES field consists of 2 bits and is transmitted in slot units. In addition, this two-bit CES bit has a specific bit pattern, and when the mobile station commands an emergency stop of message transmission through a common packet channel (CPCH), it continuously transmits two bits of a specific pattern predefined in the CES field in slot units. do. For example, a bit of '11' is transmitted through the CES field.

In this case, if it is not an emergency interruption of message transmission, energy is not transmitted to the CES field and is transmitted in a power off state.

5 is a structural diagram of a downlink dedicated physical channel (DL-DPCH) according to a third embodiment of the present invention.

Referring to FIG. 5, a third embodiment describes a structure of a downlink dedicated physical channel (DL-DPCH) capable of transmitting the CDC field and the CES field together.

In the unified structure, the CDC field is configured in the TFCI field of the downlink dedicated physical control channel (DL-DPCCH), and the CES field is configured in the second data field of the downlink dedicated physical data channel (DL-DPDCH). As described with reference to FIGS. 3 to 4, in the integrated structure, a 2-bit CDC field and a CES field are configured. In addition, the CDC field is transmitted in units of frames, and the CES field is transmitted in units of slots. In addition, the CDC field is mapped to the TFCI field using the TFCI encoding scheme.

Hereinafter, a method of controlling a common packet channel using the CDC field and the CES field proposed by the present invention will be described.

The control method of the common packet channel (CPCH) using the CDC field and the CES field has three forms.

The first is a method of controlling a common packet channel using a CDC field, the second is a method of controlling a common packet channel (CPCH) using a CES field, and the third is a common packet channel (CPCH) using a CDC field and a CES field together. Control method.

First, a common packet channel (CPCH) control method using the first CDC field will be described.

In the first step, when a mobile station transmits a message through a common packet channel (CPCH), a common packet channel (CPCH) at higher layers such as flow control, overload control, and admission control, etc. If a situation occurs that requires control over the system, the system transmits a CDC command for one radio frame through the CDC field. In this case, the CDC command is encoded by the TFCI encoder so that a total of 30 bits of information are transmitted for one radio frame, 2 bits per slot, in the CDC field on the downlink dedicated physical channel (DL-DPCH). At this time, the transmission start time of the CDC field is the transmission start time of the radio frame.

In the second step, the mobile station identifies the CDC command sent by the system by detecting the CDC field transmitted on the downlink dedicated physical channel (DL-DPCH).

In the third step, the mobile station performs a corresponding operation according to the detected CDC command.

The following describes a common packet channel (CPCH) control method using the second type of CES field.

This second type of common packet channel (CPCH) control method may be implemented in two types again.

First, a first form of a common packet channel control method using a CES field is as follows.

In the first step, when the mobile station transmits a message through a common packet channel (CPCH), if the situation in which an intra-cell capacity is overloaded or a power control error or the like occurs and an emergency interruption of the message transmission occurs occurs, the system moves down. The CES field of the link-dedicated physical channel (DL-DPCH) continuously transmits a predetermined pattern of CES bits for a certain slot. The system then sends a power control command to the mobile station to lower its transmit power. That is, when the power of the CES field is turned on, the system downs the power of the power control command (TPC) transmitted through the downlink dedicated physical channel (DL-DPCH).

In the second step, if the mobile station confirms that the energy of the CES field transmitted on the downlink dedicated physical channel (DL-DPCH) exceeds a certain threshold already set and that a specific bit pattern is already set, the physical common packet channel ( PCPCH) to stop sending messages. At this time, the physical layer of the mobile station reports the occurrence of an error to the MAC layer.

In the third step, the system confirming the message transmission stop of the mobile station stops the transmission of the downlink dedicated physical channel (DL-DPCH).

In the control method of the common packet channel (CPCH) through the first type of CES field, it should be noted that when the CES field of the mobile station is detected, the message transmission stops immediately. The transmission of the link dedicated physical channel (DL-DPCH) is stopped.

Subsequently, a second form of a common packet channel (CPCH) control method through the CES field is as follows.

In the first step, when the mobile station transmits a message through a common packet channel (CPCH), if the situation in which an intra-cell capacity is overloaded or a power control error or the like occurs and an emergency interruption of the message transmission occurs occurs, the system moves down. The CES field of the link-dedicated physical channel (DL-DPCH) continuously transmits a predetermined pattern of CES bits for a certain slot. The system then sends a power control command to the mobile station to lower its transmit power. That is, when the power of the CES field is turned on, the system downs the power of the power control command (TPC) transmitted through the downlink dedicated physical channel (DL-DPCH). The system stops transmitting the downlink dedicated physical channel (DL-DPCH) as soon as the transmission of the CES field is completed.

In the second step, if the mobile station confirms that the energy of the CES field transmitted on the downlink dedicated physical channel (DL-DPCH) exceeds a predetermined threshold and that a predetermined bit pattern is already transmitted, the physical common packet channel ( PCPCH) to stop sending messages. At this time, the physical layer of the mobile station reports the occurrence of an error to the MAC layer.

In the second method of controlling the common packet channel (CPCH) through the CES field, it should be noted that the system stops transmitting the downlink dedicated physical channel (DL-DPCH) immediately after transmitting the CES field of a certain slot. And the mobile station stops transmitting the message when it detects the CES field.

The third type common control channel (CPCH) control method will now be described.

This third type of control method is applied to an integrated structure in which the CES field and the CDC field are transmitted together.

This third type of common packet channel (CPCH) control method may be implemented in two forms again.

First, the first method of controlling a common packet channel (CPCH) is as follows.

In the first step, when a mobile station transmits a message through a common packet channel (CPCH), if the capacity of the cell is overloaded or a power control error occurs, a situation occurs that requires an emergency stop of message transmission. Through the CES field of the downlink dedicated physical channel (DL-DPCH), the CES bit of a predetermined pattern is continuously transmitted for a certain slot. The system then sends a power control command to the mobile station to lower its transmit power. That is, when the power of the CES field is turned on, the system downs the power of the power control command (TPC) transmitted through the downlink dedicated physical channel (DL-DPCH).

In addition, the system may simultaneously transmit a control command of a higher layer through a CDC field. That is, the system transmits a CDC field to control mobile station operation after an emergency interruption or to transmit additional information such as channel code information that can be used at the next access to the mobile station.

In the second step, the mobile station confirms that the energy of the CES field transmitted on the downlink dedicated physical channel (DL-DPCH) exceeds a predetermined threshold value already set and that a specific bit pattern already set is transmitted. At the same time, after checking the information transmitted in the CDC field, the transmission of the message through the physical common packet channel (PCPCH) is stopped. At this time, the physical layer of the mobile station reports the occurrence of an error to the MAC layer.

In the third step, the system confirming the message transmission stop of the mobile station stops the transmission of the downlink dedicated physical channel (DL-DPCH).

It should be noted that the control method of the common packet channel (CPCH) through the integrated structure of this first type is to transmit the CES field and the CDC field together in the system, and the mobile station detects the CES field and the CDC field together and transmits the message. And the system stops transmitting the downlink dedicated physical channel (DL-DPCH) upon confirming that the message transmission of the mobile station is stopped.

Subsequently, a second method of controlling a common packet channel (CPCH) is as follows.

In the first step, when a mobile station transmits a message through a common packet channel (CPCH), if the capacity of the cell is overloaded or a power control error occurs, a situation occurs that requires an emergency stop of message transmission. Through the CES field of the downlink dedicated physical channel (DL-DPCH), the CES bit of a predetermined pattern is continuously transmitted for a certain slot.

The system then sends a power control command to the mobile station to lower its transmit power. That is, when the power of the CES field is turned on, the system downs the power of the power control command (TPC) transmitted through the downlink dedicated physical channel (DL-DPCH).

In addition, the system may simultaneously transmit a control command of the upper layer through the CDC field according to the system situation. That is, the system transmits a CDC field to control mobile station operation after an emergency interruption or to transmit additional information such as channel code information that can be used at the next access to the mobile station.

If all of the CES fields are transmitted for a certain slot, transmission of the downlink dedicated physical channel (DL-DPCH) is stopped.

It should be noted, however, that the downlink dedicated physical channel (DL-DPCH) is not interrupted while the control command of the upper laser is transmitted through the CDC field. This is done after the transmission of the field.

In the second step, the mobile station confirms that the energy of the CES field transmitted on the downlink dedicated physical channel (DL-DPCH) exceeds a predetermined threshold value already set and that a specific bit pattern already set is transmitted. At the same time, after checking the information transmitted in the CDC field, the transmission of the message through the physical common packet channel (PCPCH) is stopped. At this time, the physical layer of the mobile station reports the occurrence of an error to the MAC layer.

It should be noted that in the control method of the common packet channel (CPCH) through the second type of integrated structure, the system stops the transmission of the downlink dedicated physical channel (DL-DPCH) after the transmission of the CES field, but the CDC field must be After all transmissions, the transmission stops downlink-oriented physical channel (DL-DPCH), and the mobile station detects the CES field and the CDC field together and stops the message transmission.

As described above, according to the present invention, an efficient control of a common packet channel (CPCH) can be performed according to a system situation by transmitting a control command of an upper layer through a downlink dedicated physical channel (DL-DPCH) in a system. There is.

In addition, when an abnormal situation occurs in the system, the mobile station can quickly transmit a message through the physical channel by sending an emergency stop command of the message transmission through the common packet channel (CPCH) through the downlink dedicated physical channel (DL-DPCH). It can be interrupted, thereby reducing the interference of the signal.

Claims (6)

In the system, either a first control command transmitted from an upper layer or a second control command for stopping message transmission through a common packet channel (CPCH) according to a system situation is mapped to a downlink dedicated physical channel (DL-DPCH). The first step of transmitting, Transmitting a power control command (TPC) for lowering the power of the mobile station when the second command is transmitted; And a third step in which the mobile station operates a common packet channel (CPCH) in accordance with each transmitted control command. The method of claim 1, wherein the first control command is mapped to a transmission type combining identifier (TFCI) field of the downlink dedicated physical channel (DL-DPCH) according to a transmission type combining identifier encoding scheme and transmitted in units of frames. The second control command is transmitted as a bit having a specific pattern already set during a predetermined slot already set in the data field of the downlink dedicated physical channel (DL-DPCH). In the system, a downlink dedicated physical channel includes a first control command transmitted from an upper layer and a second control command for stopping message transmission of the common packet channel (CPCH) in order to control the common packet channel (CPCH) according to a system situation. A first step of transmitting through (DL-DPCH), A second step of the system suspending transmission of the downlink dedicated physical channel (DL-DPCH) when the first control command and the second control command are transmitted; And a third step of the mobile station operating the common packet channel (CPCH) in accordance with each transmitted control command. A power control command field for power control; A first control command (CDC) field into which a control command of an upper layer is inserted so as to control a common packet channel (CPCH); A second control command (CES) field for stopping message transmission of the mobile station over a common packet channel (CPCH), A downlink-oriented physical channel comprising a pilot field into which pilot information is inserted. In a base station control system for wirelessly communicating with a plurality of terminals, Receiving a message transmission from one terminal through a channel common to the plurality of terminals; And transmitting a power control command for lowering the power of the mobile terminal when transmitting a control command for stopping the message transmission. In a mobile communication terminal that communicates wirelessly with a base station, Transmitting a message transmission to the base station through a channel common to a plurality of terminals communicating with the base station; Lowering the transmission power of the message when receiving a power control command for lowering the power of the mobile station that is transmitted together when transmitting the control command for stopping the transmission of the message.