KR100365334B1 - Gated transmission apparatus and method in cdma communication system - Google Patents

Abstract

The present invention discloses a channel transmitter and method for controlling a dedicated channel when there is no data to be transmitted in a code division multiple access mobile communication system for a predetermined time. The channel transmission apparatus according to the present invention proposes to control the dedicated control channel of the zero link by a predetermined gating rate when data is not transmitted through the dedicated data channel for a predetermined time. In addition, in the control of the dedicated control channel of the bidirectional link, it is proposed to control by controlling the gating rate of the dedicated control channel corresponding to the bidirectional link, respectively. Therefore, it is possible to reduce the interference of the bidirectional link, reduce the use time, reduce power control rate and power control delay, and increase cell capacity and improve the performance of the bidirectional link.

Description

Intermittent channel transmission apparatus and method for code division multiple access communication system {GATED TRANSMISSION APPARATUS AND METHOD IN CDMA COMMUNICATION SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a channel transmission apparatus and method for a code division multiple access (CDMA) type mobile communication system. In particular, the present invention relates to a channel for transmitting a dedicated channel when there is no data to be transmitted for a predetermined time. An apparatus and method for intermittent channel transmission are disclosed.

Conventional CDMA mobile communication systems have provided voice-oriented services, but gradually developed to the IMT-2000 standard that enables high-speed data transmission as well as voice. In the IMT-2000 standard, services such as high quality voice, moving picture, and internet search are possible.

On the other hand, the CDMA mobile communication system can be largely divided into synchronous and asynchronous. In this way, the asynchronous method is adopted in Europe and the synchronous method is adopted in the United States. In other words, as mentioned above, different types of standardization work is being performed in the US and Europe. The European-style next-generation mobile communication system, which is being standardized in Europe, is commonly referred to as Universal Mobile Telecommunication Systems (UMTS), and the US-type next-generation mobile communication system, which is being standardized in the United States, is generally referred to as CDMA-2000. Therefore, the next generation mobile communication system according to the above two schemes uses different channel configurations and terms, so that the following descriptions will be separately provided. In addition, the mobile communication system, which is a term used in the following description, should be interpreted as a generic term for the next generation mobile communication system employing the above two methods.

The characteristic of data communication performed in the mobile communication system is that the generation of data is made intensively at the moment, and the idle state is frequently generated so that the state in which data transmission does not occur is long. Therefore, in the next generation mobile communication system, the traffic data is transmitted through a dedicated data channel during the transmission of traffic data during a data communication service, and the dedicated data channel is maintained for a predetermined time even when there is no traffic data to be transmitted by the base station or the mobile station. It is used. That is, in consideration of limited radio resources, base station capacity, and power consumption of the mobile terminal, the traffic data is transmitted through a dedicated traffic channel during actual data transmission, and for a predetermined time even when there is no traffic data to transmit. By maintaining a dedicated traffic channel between the base station and the mobile station to minimize the time delay caused by the synchronization reacquisition when the traffic data to be transmitted.

In such a mobile communication system, not only voice but also data services such as packets require various states depending on channel allocation status and presence or absence of status information. As an example, the state transition diagrams for cell connectivity, user data active and control hold states are well documented in the 3GPP RAN TS S2 series (S2.03, 99.04) document (ftp://ftp.3gpp.org). /).

FIG. 1A illustrates a state transition in a cell connected state of a mobile communication system. Referring to FIG. 1A, a state in a cell connection state may include a paging channel (PCH) state, a random access channel (RACH) / downlink shared channel (DSCH) state, and a random access channel (RACH) / forward (FACH) state as illustrated. link access channel (DCH) state, dedicated channel (DCH) / DCH, DCH / DCH + DSCH, DCH / DSCH + DSCH Ctrl (Control Channel) state, and the like.

FIG. 1B shows a user data active substate and a control only substate in the DCH / DCH, DCH / DCH + DSCH, DCH / DSCH + DSCH Ctrl states. The present invention relates to a state in which there is no traffic data to be transmitted for a preset time (for example, the DCH / DCH control maintenance substate) among the above states.

In the voice-oriented CDMA mobile communication system, a method of releasing a channel where data transmission is terminated and requesting a channel again when a data transmission is required again is used to transmit data. However, in order to provide other services such as packet data services other than voice services, high quality services cannot be provided by using a conventional method because there are many delay factors such as reconnection delay time. Therefore, in order to provide other services such as packet data services other than voice services, services must be provided using a method different from the conventional method. Packet data services, such as Internet access and file downloads, are often intermittent. Therefore, there is a period in which data is not transmitted until some packet data is transmitted and then next packet data is transmitted. In this period, using the conventional method, it is necessary to release the dedicated data channel or keep the dedicated data channel. When the dedicated data channel is released, it takes a long time to reconnect, so that a corresponding service cannot be provided. If the channel is kept, the channel is wasted.

On the other hand, in order to solve this problem, the synchronous method includes a dedicated control channel in the base station and the terminal, and transmits / receives a control signal related to the dedicated data channel in a period in which data is transmitted and received. In the period in which data transmission and reception do not occur, the dedicated data channel is released and only the dedicated control channel is maintained to prevent the waste of the channel and to quickly access the data to be transmitted again. This state is called a control only substate.

However, in the asynchronous method, although the dedicated control channel is provided, the dedicated control channel is released at the same time as the release of the dedicated data channel, so that there is a problem that a quick connection is not made when data to be retransmitted occurs.

First, the asynchronous method (UMTS) of the two mobile communication systems described above will be described.

The downlink from the base station to the mobile station or the uplink from the mobile station to the base station includes the following physical channels. In the following description, descriptions of other physical channels outside the scope of the present invention will be omitted. Dedicated Physical Control CHannel (hereinafter referred to as DPCCH) including pilot symbols for synchronization acquisition and channel estimation, and Dedicated Physical Data CHannel (hereinafter referred to as DPDCH) to communicate traffic data with a specific mobile station. And the like). The downlink DPDCH is composed of traffic data, and the downlink DPCCH is information related to the format of the transmission data (Transport Format Combination Indicator, TFCI), power control information (bit) which is a command for power control (Transmit Power Control). One slot (power control group) includes control information such as a pilot symbol for providing a reference phase for allowing a receiver (base station or terminal) to perform phase compensation. In this case, the DPDCH and the DPCCH are multiplexed in time in one power control group on the downlink, and are separated by different orthogonal codes in the uplink.

For reference, in the following description, the present invention describes a case in which a frame length is 10 msec and 16 power control groups exist in one frame, that is, a length of one power control group is 0.625 msec. Will be. The case where the frame length is 10 msec and 15 power control groups exist in one frame, that is, the case where the length of the power control group is 0.667 msec will be described. In the following description, it is assumed that the power control group (0.625 ms or 0.667 msec) and the slot unit (0.625 ms or 0.667 msec) have the same time interval. The power control group (or slot) includes a pilot symbol (Pilot), traffic data, information related to the format of the transmission data (TFCI), power control information (TPC), and the like. The above values are selected only for the purpose of explanation of the invention and are not essential.

FIG. 2A illustrates a slot structure in which the downlink DPDCH and the DPCCH are configured in an asynchronous manner. In FIG. 2A, the DPDCH is divided into traffic data 1 (Data1) and traffic data 2 (Data2). However, depending on the type of traffic data, the traffic data 1 may not exist and only traffic data 2 may exist. Table 1 below shows examples of symbols constituting the downlink DPDCH / DPCCH field, and the number of TFCI, TPC, and Pilot bits in one slot may vary according to data transmission rate and spreading factor.

Downlink DPDCH / DPCCH Fields Channel Bit Rate (kbps) Channel Symbol Rate (ksps) SF Bits / Frame Bits / Slot DPDCHBits / Slot DPCCHBits / Slot DPDCH DPCCH TOT Ndata1 Ndata2 N _TFCI N _TPC Npilot 16 8 512 64 96 160 10 2 2 0 2 4 16 8 512 32 128 160 10 0 2 2 2 4 32 16 256 160 160 320 20 2 8 0 2 8 32 16 256 128 192 320 20 0 8 2 2 8 64 32 128 480 160 640 40 6 24 0 2 8 64 32 128 448 192 640 40 4 24 2 2 8 128 64 64 1120 160 1280 80 14 56 0 2 8 128 64 64 992 288 1280 80 6 56 8 2 8 256 128 32 2400 160 2560 160 30 120 0 2 8 256 128 32 2272 288 2560 160 22 120 8 2 8 512 256 16 4832 288 5120 320 62 240 0 2 16 512 256 16 4704 416 5120 320 54 240 8 2 16 1024 512 8 9952 288 10240 640 126 496 0 2 16 1024 512 8 9824 416 10240 640 118 496 8 2 16 2048 1024 4 20192 288 20480 1280 254 1008 0 2 16 2048 1024 4 20064 416 20480 1280 246 1008 8 2 16

On the other hand, unlike the downlink DPDCH and DPCCH, the uplink DPDCH and DPCCH from the mobile station to the base station are distinguished by the channel classification code.

FIG. 2B illustrates a slot structure in which the uplink DPDCH and the DPCCH are configured in an asynchronous manner. In FIG. 2B, the number of TFCI, FBI, TPC, and Pilot bits in the slot may vary depending on a situation such as transmission antenna diversity, service option, or handover that changes the type of traffic data. The FBI (FeedBack Information) is information that a UE requests for information on a phase difference between two antennas when a base station uses a transmit diversity antenna. Tables 2 and 3 show examples of symbols constituting the uplink DPDCH field and the reverse DPCCH field.

Uplink DPDCH Field ChannelBit Rate (kbps) Channel Symbol Rate (ksps) SF Bits / Frame Bits / Slot Ndata 16 16 256 160 10 10 32 32 128 320 20 20 64 64 64 640 40 40 128 128 32 1280 80 80 256 256 16 2560 160 160 512 512 8 5120 320 320 1024 1024 4 10240 640 640

Uplink DPCCH Field Channel Bit Rate (kbps) Channel Symbol Rate (ksps) SF Bits / Frame Bits / Slot Npilot N _TPC N _TFCI N _FBI 16 16 256 160 10 6 2 2 0 16 16 256 160 10 8 2 0 0 16 16 256 160 10 5 2 2 One 16 16 256 160 10 7 2 0 One 16 16 256 160 10 6 2 0 2 16 16 256 160 10 5 One 2 2

Tables 1, 2, and 3 illustrate the case where there is only one DPDCH as a traffic channel, and there may be second, third, and fourth DPDCHs depending on the service. In addition, multiple DPDCHs may exist regardless of the downlink and uplink DPDCHs. In this case, SF represents a spreading factor.

The hardware configuration of the asynchronous mobile communication system (base station transmitter and mobile station transmitter) according to the prior art will be described with reference to FIGS. 3A and 3B. In the description of the base station transmitter and the mobile station transmitter of the present invention, a case where there are three DPDCHs as traffic channels will be described as an example. However, the number of DPDCHs is at least one and is not limited to the number.

3A shows a simplified configuration of a base station transmitter in a conventional asynchronous mobile communication system.

Referring to FIG. 3A, the multipliers 111, 121, 131, and 132 each use gain coefficients G ₁ , G ₂ , G ₃ , and G ₄ for the DPCCH signals and the DPDCH _1,2,3 signals that perform channel encoding and interleaving. The device for multiplying. The gain coefficients G ₁ , G ₂ , G ₃ , and G ₄ may have different values depending on the situation, such as a service type or a handover situation. The multiplexer 112 multiplexes (multiplexes) the DPCCH signal and the DPDCH ₁ signal in time to have a slot structure as shown in FIG. 2A. The first S / P 113 is a serial / parallel converter for distributing the output of the multiplexer 112 into I and Q channels. The second S / P 133 and the third S / P 134 are devices for distributing the DPDCH ₂ and the DPDCH ₃ into I and Q channels by performing serial / parallel conversion. The serial-to-parallel I-channel and Q-channel signal outputs are channelization codes C _ch1 , C _ch2 , and C _ch3 to spread and channel distinguish the outputs in multipliers 114, 122, 135, 136, 137 and 138. Multiplied by An orthogonal code is used for the channel identification code. The I-channel and Q-channel signal outputs multiplied by the channel division codes in the multipliers 114, 122, 135, 136, 137, and 138 are summed in the first summer 115 and the second summer 123, respectively. The I-channel signals are summed and output from the first summer 115. The Q-channel signal is summed and output by the second summer 123 and then phase shifted 90 degrees at the phase shifter 124. Summer 116 adds the output of first summer 115 and the output of phase shifter 124 to produce a complex signal I + jQ signal. The multiplier 117 scrambles the complex signal by a PN sequence C _scramb allocated to each base station, and the signal separator 118 _divides the scrambled sequence into real and imaginary parts and distributes the scrambled sequence into I and Q channels. The output of the signal separator 118 passes through the low pass filters 119 and 125 for each of I and Q channels to generate a signal with limited bandwidth. The output signals of the filters 119 and 125 are multiplied by the carriers (cos {2πf _c t} and sin {2πf _c t}) in multipliers 120 and 126, respectively, and are shifted to the high frequency band, and the summer 127 is the I which is shifted to the high frequency band. Sum signal of channel and Q channel and output.

3B shows a simplified configuration of a mobile station transmitter in the conventional asynchronous mobile communication system.

Referring to FIG. 3B, the multipliers 211, 221, 223, and 225 are channelization codes C for spreading and channel distinguishing each of the DPCCH signals and the DPDCH _1,2,3 signals which have been channel encoded and interleaved. Device for multiplying _ch1 , C _ch2 , C _ch3 , and C _ch43 . An orthogonal code is used for the channel identification code. The outputs of the multipliers 211, 221, 223, and 225 multiplied by the channel division code are multiplied by the gain coefficients G ₁ , G ₂ , G ₃ , and G ₄ in the multipliers 212, 222, 224, and 226, respectively. The gain coefficients G ₁ , G ₂ , G ₃ , and G ₄ may have different values. The outputs of the multipliers 212 and 222 are summed by the first summer 213 and output as an I channel signal, and the outputs of the multipliers 224 and 226 are summed by the second summer 227 and output as a Q channel signal. The output of the second summer 227, which is the Q channel signal, is phase shifted by 90 degrees at the phase shifter 228. The summer 214 adds the output of the first summer 213 and the output of the phase shifter 228 to generate a complex signal I + jQ signal. The multiplier 215 scrambles the complex signal by a PN sequence (C _scramb ) allocated to each base station, and the signal separator 229 _divides the scrambled sequence into real and imaginary parts and distributes the scrambled sequence into I and Q channels. The output of the signal separator 229 passes through the low pass filters 216 and 230 for each of I and Q channels to generate a signal with limited bandwidth. The output signals of the low pass filters 216, 230 are multiplied by the carriers (cos {2πf _c t}, sin {2πf _c t}) in multipliers 217 and 231, respectively, and are shifted to the high frequency band, and the summer 218 is the I which is shifted to the high frequency band. Sum signal of channel and Q channel and output.

In the asynchronous mobile communication system, a transmission signal configuration of a base station and a mobile station according to the prior art is as follows.

FIG. 5A illustrates a downlink DPCCH and uplink DPCCH signal transmission in a case where transmission of the uplink DPDCH according to the conventional method is stopped in the asynchronous mobile communication system, that is, when there is no traffic data to be transmitted for a predetermined time. The state in which the traffic data to be transmitted is absent for a predetermined time is called a control holding substate.

FIG. 5B is a diagram illustrating downlink DPCCH and uplink DPCCH signal transmission when downlink DPDCH transmission is stopped according to a conventional method in an asynchronous mobile communication system, that is, traffic data to be transmitted does not exist for a predetermined time. to be.

5A and 5B, the mobile station continuously transmits the uplink DPCCH to avoid resynchronization acquisition at the base station in the absence of traffic data to transmit. On the other hand, when there is no traffic data to be transmitted for a long time in the state of continuously transmitting the uplink DPCCH when the base station and the mobile station transitions to the Radio Resource Control Connection Released state (not shown) The uplink DPCCH increases the uplink interference since the mobile station transmits pilot symbols and power control bits on the DPCCH until the transmission is stopped but before the transition. The uplink interference increase reduces the capacity of the reverse link.

The continuous transmission of the uplink DPCCH in the control maintaining sub-state according to the conventional scheme is advantageous in that it can avoid the synchronous re-acquisition process at the base station. It is advantageous in that the synchronization reacquisition process at the base station can be avoided by continuously transmitting the uplink DPCCH in the absence. However, as mentioned above, the capacity of the uplink is reduced by increasing the interference on the uplink. In addition, sending consecutive reverse power control bits on the downlink results in increased downlink interference and reduced capacity. While minimizing the time spent in the synchronization reacquisition process in the base station, it is necessary to minimize the increase in interference due to the transmission of the uplink DPCCH and the increase in interference due to the transmission of the uplink power control bits to the downlink.

Next, the synchronous method (CDMA2000) of the above-described two mobile communication systems will be described.

As described above, in a synchronous mobile communication system, a dedicated control channel is provided to prevent channel waste caused by maintaining a channel when there is no traffic data to be transmitted. That is, the base station and the terminal are provided with a dedicated control channel to transmit and receive a control signal related to the dedicated data channel in the period of data transmission and reception, and release the dedicated data channel and maintain only the dedicated control channel in the period of no data transmission and reception. Do it. As a result, waste of the channel can be prevented, and when data to be transmitted is generated, a dedicated data channel can be quickly set up using the dedicated control channel. This state is called a control hold state in a synchronous manner. The control hold state is divided into two substates. One is the normal substate, and the other is the slotted substate. In the normal state, there is no data to be transmitted through a communication channel, only a control signal is transmitted and received through a dedicated control channel. The time division sub-state is a state in which packet data has not been transmitted or received for a long time in the normal state, and control signals are not transmitted / received. In the time division state, resynchronization is required between the base station and the terminal in order to transition back to the normal state because the base station and the terminal do not exchange control signals with each other. The system may be implemented to have only the steady state without setting the time division substate.

The hardware configuration according to the prior art in which the above-described synchronous mobile communication system transmits a signal in a control holding state is as follows. In the following description, the frame length is 20 msec, when there are 16 power control groups in one frame, that is, the length of the power control group is 1.25 msec and the frame length of the dedicated control channel is 5 msec.

3c shows a simplified configuration of a base station transmitter in a conventional synchronous mobile communication system. The forward link from the base station to the mobile station includes the following channels. A pilot channel serving as a reference channel for synchronization acquisition and channel estimation, a forward common control channel (F-CCCH) capable of communicating control messages with all mobile stations in a cell managed by the base station, and a specific mobile station. Forward Dedicated Control CHannel (F-DCCH) and Forward Dedicated Traffic CHannel (F-DTCH) for communicating traffic data with a specific mobile station. The forward dedicated control channel includes a time division forward dedicated control channel (Sharable F-DCCH) in control message communication with a specific mobile station in a time division manner. The forward dedicated traffic channel may be a forward basic channel (F-FCH: Forward Fundamental CHannel) and a forward supplementary channel (F-SCH).

In FIG. 3C, the demultiplexer (DEMUX) or the deserializer 120, 122, 124, and 126 are apparatuses for distributing data obtained by channel encoding and interleaving into I and Q channels. Mixers 110, 130, 131, 132, 133, 134, 135, 136, and 137 multiply their orthogonal codes (e.g. Walsh code W) to spread and channel distinguish the above distributed data. The outputs of the mixers 110, 130, 131, 132, 133, 134, 135, 136, 137 are adjusted to be relative to the forward pilot channel to the amplifiers 140, 141, 142, 143, 144, 145, 146, Go through 147 The outputs of the amplifiers 140, 141, 142, 143, 144, 145, 146, and 147 are input to the summers 150 and 152 for the I and Q channels, respectively, and are combined. The outputs of the summers 150, 152 are scrambled by 160, which is a complex multiply, by a PN sequence allocated for each base station. The output of the complex diffuser 160 passes through filters 170 and 171 for each of I and Q channels to generate a signal with limited bandwidth. The outputs of the filters 170 and 171 are amplified by the amplifiers 172 and 173 to the size required for transmission again. Mixers 174 and 175 multiply the output of the amplifiers 172 and 173 by a carrier wave to transition the signal to a high frequency band. The summer 180 sums and outputs the signals of the I and Q channels.

3d shows a simplified configuration of a mobile station transmitter in a conventional synchronous mobile communication system. In the reverse direction from the mobile station to the base station, a pilot signal which is a reference channel for synchronization acquisition and channel estimation, a pilot / PCB channel multiplexed with a forward power control bit (PCB) for forward power control, and a cell to which the mobile station belongs Reverse Dedicated Control CHannel (R-DCCH) for control message communication with the base station that manages the base station and Reverse Dedicated Traffic CHannel (R-DTCH) for communicating traffic data with the base station. There are a basic channel (R-FCH: Reverse Fundamental CHannel) and a reverse supplemental channel (R-SCH: Reverse Supplemental CHannel).

In FIG. 3D, the multiplexer (MUX) 210 is an apparatus for multiplexing a reverse pilot channel and a forward power control bit. Mixers 220, 230, 240, 250, and 260 multiply orthogonal codes that maintain orthogonality between the channels to channelize and spread the channel-encoded and interleaved reverse channels. The outputs of the mixers 220, 230, 240, 250, 260 are then passed through amplifiers 222, 242, 252, 262 to adjust to their relative magnitude relative to the reverse pilot / PCB channel. The outputs of the amplifiers 222, 242, 252, and 262 are input to the summers 224 and 254 for I and Q channels, respectively, and are combined. The outputs of the summers 224, 254 are scrambled by 160, which is a complex spreader by a PN sequence assigned for each mobile station. The output of the complex spreader 160 passes through the filters 170 and 171 for each I channel and Q channel to generate a signal with limited bandwidth. The outputs of the filters 170 and 171 are amplified by the amplifiers 172 and 173 to the size required for transmission again. Mixers 174 and 175 multiply the output of the amplifiers 172 and 173 by a carrier wave to transition the signal to a high frequency band. The summer 180 sums and outputs the signals of the I and Q channels.

In the synchronous mobile communication system, a transmission signal configuration diagram of a base station and a mobile station according to the prior art is as follows.

Reference numeral 300 of FIG. 5C is a signal transmission diagram of a reverse pilot / PCB channel in a state in which a reverse dedicated control channel signal is continuously transmitted in a control hold state / normal negative state according to a conventional scheme. In order to avoid the resynchronization acquisition process at the base station, the mobile station continuously transmits the reverse pilot / PCB channel in the control hold state / normal sub state. The increase in reverse link interference reduces the capacity of the reverse link.

Reference numeral 400 of FIG. 13A indicates a generation position of a reverse dedicated control channel when a reverse dedicated MAC channel (dmch) is generated in a control hold state / normal negative state according to a conventional scheme. will be. R-DCCH may be transmitted within a maximum of 5 msec after the dmch generation. In this case, the R-DCCH may exist only at an integer multiple of 5 msec. Due to the small number of cases that can exist in this way, the base station needs to determine the existence of the R-DCCH only at four locations within one frame. On average, a 2.5 msec delay occurs after the dmch generation until the R-DCCH transmission.

As described above, the continuous transmission of the reverse pilot / PCB channel in the control hold state / normal negative state according to the conventional synchronization method is advantageous in that the synchronization reacquisition process at the base station can be avoided. However, as mentioned above, the reverse capacity is reduced by increasing the interference on the reverse link. In addition, the transmission of consecutive reverse power control bits on the forward link results in increased interference and reduced capacity of the forward link. Therefore, it is necessary to minimize the time spent in the synchronization reacquisition process at the base station, and to increase the interference by the transmission of the reverse pilot / PCB channel and the increase of the interference by the transmission of the reverse power control bit on the forward link. have.

Accordingly, an object of the present invention to solve the above problems is to provide an intermittent channel transmission apparatus and method for fast reconnection in the absence of traffic data to be transmitted in the mobile communication system.

Another object of the present invention is to provide an intermittent channel transmission apparatus and method for minimizing an increase in interference between links in a state in which there is no traffic data to be transmitted in a mobile communication system.

It is still another object of the present invention to intercept dedicated control channels of the forward link and reverse link by different gating rates in the absence of traffic data to be transmitted in a mobile communication system, thereby increasing power control rate and reducing power control delay. A transmitter and method are provided.

Another object of the present invention is to control the uplink and downlink dedicated control channels by different gating rates in the absence of traffic data to be transmitted in the mobile communication system, thereby increasing the power control rate and reducing the power control delay. A transmitter and method are provided.

Another object of the present invention is to specify the slot positions of the forward link and the reverse link in the absence of traffic data to be transmitted, thereby minimizing the power control delay or intermittent channel transmission capable of balancing the power control delay of the bidirectional link. An apparatus and method are provided.

Another object of the present invention is to specify the slot positions of the downlink and the uplink in the absence of traffic data to be transmitted, thereby minimizing the power control delay or intermittent channel transmission to balance the power control delay of the bidirectional link. An apparatus and method are provided.

1A is a state transition diagram for packet data services.

1B is a transition diagram between a user data active part state and a control holding part state in the DCH / DCH state.

2a is a slot configuration diagram of a forward DPDCH and a DPCCH in an asynchronous mobile communication system

2b is a slot configuration diagram of a reverse DPDCH and a DPCCH in an asynchronous mobile communication system

Figure 3a is a simplified configuration of a base station transmitter in a conventional asynchronous mobile communication system.

Figure 3b is a simplified configuration diagram of a mobile station transmitter in a conventional asynchronous mobile communication system.

Figure 3c is a simplified configuration diagram of a base station transmitter in a conventional synchronous mobile communication system.

3D is a simplified block diagram of a mobile station transmitter in a conventional synchronous mobile communication system.

Figure 4a is a simplified block diagram of a base station transmitter in an asynchronous mobile communication system according to an embodiment of the present invention.

Figure 4b is a simplified configuration diagram of a mobile station transmitting apparatus in an asynchronous mobile communication system according to an embodiment of the present invention.

Figure 4c is a simplified block diagram of a base station transmitter in a synchronous mobile communication system according to another embodiment of the present invention.

Figure 4d is a simplified block diagram of a mobile station transmitting apparatus in a synchronous mobile communication system according to another embodiment of the present invention.

FIG. 5A is a diagram illustrating the transmission of DPCCH signals in a bidirectional link when reverse DPDCH transmission is interrupted because there is no traffic data to transmit in the conventional asynchronous mobile communication system. FIG.

5B is a diagram illustrating the transmission of DPCCH signals of a bidirectional link when there is no traffic data to be transmitted in the conventional asynchronous mobile communication system and transmission of the forward DPDCH is stopped.

5C is a reverse pilot / PCB channel transmission signal diagram in a control holding sub-state in a synchronous mobile communication system according to the prior art and the present invention;

6A illustrates an example of a transmission signal according to a regular or intermittent transmission pattern of an uplink DPCCH in an intermittent mode of an asynchronous mobile communication system according to an embodiment of the present invention.

6B is a diagram illustrating another example of a transmission signal according to a regular or intermittent transmission pattern of an uplink DPCCH in an intermittent mode of an asynchronous mobile communication system according to an embodiment of the present invention.

7A illustrates an example of a transmission signal when an uplink DPDCH message occurs during intermittent transmission of an uplink DPCCH in an intermittent mode of an asynchronous mobile communication system according to an embodiment of the present invention;

7B illustrates another example of a transmission signal when an uplink DPDCH message occurs during intermittent transmission of an uplink DPCCH in an intermittent mode of an asynchronous mobile communication system according to an embodiment of the present invention;

8A is a diagram illustrating a signal transmission of a bidirectional link due to transmission stop of a downlink DPDCH in an asynchronous mobile communication system according to an embodiment of the present invention.

8B is a diagram illustrating a signal transmission of a bidirectional link due to the suspension of uplink DPDCH in an asynchronous mobile communication system according to an embodiment of the present invention.

8C is a diagram illustrating another example of a signal transmission diagram of a bidirectional link caused by transmission of downlink DPDCH in an asynchronous mobile communication system according to one embodiment of the present invention;

FIG. 8D is a diagram illustrating another example of a signal transmission diagram of a bidirectional link due to interruption of uplink DPDCH in an asynchronous mobile communication system according to one embodiment of the present invention; FIG.

FIG. 9A is a diagram illustrating an example of a signal transmission diagram of a bidirectional link due to a suspension of downlink DPDCH in an asynchronous mobile communication system according to an embodiment of the present invention. (Downlink DPCCH Intermittent Transmission)

FIG. 9B is a diagram illustrating an example of a signal transmission diagram of a bidirectional link due to interruption of uplink DPDCH in an asynchronous mobile communication system according to an embodiment of the present invention. (Downlink DPCCH Intermittent Transmission)

10A is a diagram of a bidirectional link signal transmission having the same gating rate when an intermittent transmission message is transmitted on the uplink in an intermittent mode of an asynchronous mobile communication system according to an embodiment of the present invention.

10B illustrates a first embodiment of bidirectional link signal transmission having a different gating rate when an intermittent transmission message is transmitted on the uplink in an intermittent mode of an asynchronous mobile communication system according to an embodiment of the present invention.

FIG. 10C is a second embodiment of a bidirectional link signal transmission having a different gating rate when an intermittent transmission message is transmitted on the uplink in an intermittent mode of an asynchronous mobile communication system according to an embodiment of the present invention. FIG.

11A is a diagram of a bidirectional link signal transmission having the same gating rate when an intermittent transmission message is transmitted on the downlink in an intermittent mode of an asynchronous mobile communication system according to an embodiment of the present invention.

11B illustrates a first embodiment of bidirectional link signal transmission having a different gating rate when an intermittent transmission message is transmitted on the downlink in an intermittent mode of an asynchronous mobile communication system according to an embodiment of the present invention.

FIG. 11C is a second embodiment of a bidirectional link signal transmission having a different gating rate when an intermittent transmission message is transmitted on the downlink in an intermittent mode of an asynchronous mobile communication system according to an embodiment of the present invention. FIG.

12A is a diagram illustrating a power control delay according to propagation delay with and without a downlink DPDCH in an intermittent mode of an asynchronous mobile communication system according to an embodiment of the present invention;

FIG. 12B is a diagram illustrating a power control delay according to propagation delay with and without an uplink DPDCH in an intermittent mode of an asynchronous mobile communication system according to one embodiment of the present invention; FIG.

13A is a diagram illustrating a reverse pilot / PCB channel transmission signal by activating a reverse dedicated control channel in a control holding state of a synchronous mobile communication system according to the present invention and another embodiment of the present invention. For intermittent transmission)

FIG. 13B is a diagram illustrating a reverse pilot / PCB channel transmission signal caused by a reverse dedicated control channel activation in a control holding state of a synchronous mobile communication system according to another embodiment of the present invention. When sending)

FIG. 13C is a diagram illustrating a reverse pilot / PCB channel transmission signal by activating a reverse dedicated control channel in a control holding state of a synchronous mobile communication system according to another embodiment of the present invention. Intermittent transmission at regular time intervals from multiple locations in one frame)

FIG. 13D is a diagram illustrating a reverse pilot / PCB channel transmission signal by activating a reverse dedicated control channel in a control holding state of a synchronous mobile communication system according to another embodiment of the present invention. Intermittent transmission at regular time intervals from one location within a frame)

FIG. 14A is a diagram illustrating a two-way link signal transmission having the same interruption in a case where a reverse dedicated control channel is not activated in a control holding state of a synchronous mobile communication system according to another embodiment of the present invention; FIG.

14B illustrates a first embodiment of a bidirectional link signal transmission having a different interruption rate when a reverse dedicated control channel is activated or not in a control holding state of a synchronous mobile communication system according to another embodiment of the present invention. Figure. (Forward Channel Transmission DC = 1)

FIG. 14C illustrates a second embodiment of bidirectional link signal transmission having a different interruption rate when a reverse dedicated control channel is activated or not in a control holding state of a synchronous mobile communication system according to another embodiment of the present invention; FIG. Figure. (Forward Channel Transmission DC = 2)

FIG. 15A is a diagram illustrating a two-way link signal transmission having the same interruption rate when a forward dedicated control channel is not activated in a control holding state of a synchronous mobile communication system according to another embodiment of the present invention; FIG.

15B illustrates a first embodiment of bidirectional link signal transmission having a different interruption rate when a forward dedicated control channel is activated or not in a control holding state of a synchronous mobile communication system according to another embodiment of the present invention. One diagram (reverse channel transmit DC = 1).

FIG. 15C illustrates a second embodiment of bidirectional link signal transmission having a different interruption rate when a forward dedicated control channel is activated or not in a control holding state of a synchronous mobile communication system according to another embodiment of the present invention; FIG. One diagram (reverse channel transmit DC = 2).

FIG. 16A illustrates an embodiment of a power control delay according to an interruption pattern of a transmission signal when a forward dedicated control channel is activated or not in a control holding state of a synchronous mobile communication system according to another embodiment of the present invention; FIG. .

16B is a view illustrating an embodiment of power control delay according to an interruption pattern of a transmission signal when a reverse dedicated control channel is activated or not in a control holding state of a synchronous mobile communication system according to another embodiment of the present invention; .

DETAILED DESCRIPTION Hereinafter, a detailed description of the present invention will be described with reference to the accompanying drawings. The present invention to be described below is directed to a mobile communication system of a code division multiple access method. Embodiments of the present invention are necessary to embody the main subject matter of the present invention, and do not limit the content of the present invention. On the other hand, embodiments of the present invention to be described below will be largely divided into asynchronous and synchronous methods. In describing the embodiments of the present invention, the components of the other drawings that perform the same operations as the aforementioned components use the same reference numerals as before. Differentiated processes from the conventional method are given new reference numerals, and description is mainly focused on differentiated points.

As described above, the embodiment according to the present invention can be largely divided into an example implemented in the asynchronous manner and an example implemented in the synchronous manner. Accordingly, the following detailed description with reference to the accompanying drawings will be described separately for the two different ways.

1. Application example of asynchronous method

First, an embodiment of the present invention to be applied to a mobile communication system using an asynchronous method will be described in detail with reference to the accompanying drawings (FIGS. 4A, 4B, and 6A to 12B).

In the following description, "normal transmission" means continuous transmission of control information included in the downlink or uplink DPCCH, that is, TFCI, TPC, pilot symbol, etc. without interruption. In the following description, 'Gated transmission' refers to control information included in the downlink DPCCH, that is, TFCI, TPC, and pilot symbols according to a predetermined time pattern when there is no data transmitted for a predetermined time. It means not transmitting in a specific power control group (or slot), but transmitting in a specific power control group (or slot). On the other hand, the term " state transition " generally refers to a change in the gating rate of normal transmission in intermittent transmission or intermittent transmission in normal transmission. The interruption of transmission on the downlink DPCCH during the intermittent transmission may be the entire TFCI and TPC and pilot symbols in a particular n th power control group (or one slot), or in a particular n th power control group (or one slot) It may be a pilot symbol, a TFCI in the n + 1 th power control group, and a TPC. In the intermittent transmission, transmission is stopped in the uplink DPCCH is the entire TFCI, TPC, FBI and pilot symbols in a specific power control group (or one slot). In the following, the intermittent transmission unit is the same as the slot unit means that the TFCI, TPC and pilot symbols in one power control group are set as the intermittent transmission unit, and that the intermittent transmission unit is different from the slot unit. Meaning means that the nth pilot symbol and the n + 1th TFCI and TPC are set in intermittent transmission units.

Also, in the present invention, since the performance of the beginning of the frame is very important, the TPC for power control of the first slot of the next frame is placed in the last slot of one frame. That is, the downlink DPCCH and the TPC bit of the uplink DPCCH are positioned in the last slot of the nth frame, and the power of the first slot of the n + 1th frame is stored in the last slot of the nth frame. To control power.

Further, according to the present invention, even when data to be transmitted is generated while control information is intermittently transmitted, a power control rate can be maintained. That is, even when data to be transmitted is generated during the control information control, the control of the information TPC for power control is maintained. The intermittent pattern of the downlink DPCCH and the intermittent pattern of the uplink DPCCH are determined to have offsets. That is, the control information of the downlink DPCCH and the control information of the uplink DPCCH are interrupted at different points in time.

Hardware configuration according to an embodiment of the present invention is as follows.

4A illustrates a configuration of a base station transmitter according to an embodiment of the present invention. The difference from the configuration of the conventional base station transmitter of FIG. 3A is that the output of the multiplier 111 is interrupted by the Gated Transmission Controller 141 for the downlink DPCCH. That is, the Gated Transmission Controller 141 transmits the TFCI and TPC bits in the downlink DPCCH to the mobile station in the downlink and uplink DPDCHs for a predetermined time. Intermittent transmission in the slot). In addition, the intermittent transmission controller 141 may transmit one power control group (or one slot as a whole) including the pilot symbols, the TFCI, and the TPC bits of the downlink DPCCH while the traffic data is not transmitted on the downlink and uplink DPDCHs for a predetermined time. Intermittent transmissions are made in the power control group (or timeslot) promised with the mobile station.

The downlink intermittent transmission pattern is the same pattern as the uplink intermittent transmission pattern, but there may be an offset between the two for efficient power control. The above offset is given as a system parameter.

The intermittent transmission controller 141 may perform an operation when the intermittent transmission unit is the same as the slot unit or may perform an operation when the intermittent transmission unit is different from the slot unit. When the intermittent transmission unit and the slot unit are different, the intermittent transmission controller 141 intercepts the TFCI, the TPC, and the pilot symbol differently. In other words, the n-th pilot symbol set in advance and the n + 1-th TFCI and TPC are set in the intermittent transmission unit.

The intermittent transmission controller 141 also places a TPC for power control of the first slot of the next frame in the last slot of one frame for performance of the beginning of the frame. That is, the downlink DPCCH and the TPC bits of the uplink DPCCH are positioned in the last slot of the nth frame, and the power of the first slot of the n + 1th frame is stored in the last slot of the nth frame. To control power.

4B is a block diagram of a mobile station transmitting apparatus according to an embodiment of the present invention. The difference from the conventional mobile station transmitter configuration of FIG. 3B is that there is an intermittent transmission controller 241 for intermittent transmission of the uplink DPCCH. That is, the Gated Transmission Controller 241 is a power control group including pilot symbols, TFCI, FBI, and TPC bits in the uplink DPCCH in the control hold state in which traffic data is not transmitted to the downlink and uplink DPDCHs. Or an entire slot) is intermittently transmitted in the power control group (or time slot) promised by the base station. Transmission of the pilot symbol and the TPC bit on the uplink DPCCH is essential for synchronous detection, and there is no way to send TPC, FBI, and pilot symbols to another uplink channel in the period when transmission of the channel is stopped.

Transmission signal configuration diagrams of a base station and a mobile station according to an embodiment of the present invention are as follows.

6A illustrates a signal transmission diagram according to a regular or intermittent transmission pattern of an uplink DPCCH when there is no DPDCH data to be transmitted for a preset time according to an embodiment of the present invention. Reference numerals 301, 302, 303, and 304 of FIG. 6A illustrate different gating rates according to the ratio of duty cycles (hereinafter, referred to as DCs). Reference numeral 301 shows transmission (DC = 1, normal transmission (or normal transmission)) without interrupting the uplink DPCCH as in the prior art, and reference numeral 302 indicates that DC is 1/2 (total power control in one frame). In the case of transmitting only one half of a group), one group of power control groups (or timeslots) is transmitted regularly. Reference numeral 303 denotes one power control group (fourth, seventh, eleventh, and fifteenth power control groups per four power control groups) in the case of DC = 1/4 (only one quarter of the total power control groups in one frame). Shows regular transmission. Reference numeral 304 is regularly transmitted from one power control group (7th and 15th power control group) per eight power control groups when DC = 1/8 (only 1 / 8th of the entire power control group is transmitted within one frame). It is shown. In the embodiment of FIG. 6A, when the intermittent transmission controller 241 of the mobile station regularly regulates the power control group of the uplink DPCCH when DC = 1/2 and 1/4, the standard power control group is used. It is also possible to control arbitrary power control groups according to the DC. That is, in the case of DC = 1/2, one adjacent power control group may be continuously interrupted in accordance with an irregular pattern without transmitting every power control group regularly. In the case of DC = 1/2, half of the entire power control group can also be transmitted continuously in the second half of the frame (the 8th to 15th power control groups). In the case of DC = 1/4, 1/4 of the entire power control group can be transmitted continuously (from the 12th to 15th power control group) from 3/4 of the frame. In the case of DC = 1/8, 1/8 of the entire power control group can be transmitted continuously (from the 14th to 15th power control group) from 7/8 of the frame.

The following cases may exist in the transition method of the interruption rate, and the transition method of the interruption rate is determined according to the system setting. One method is from DC = 1/1 to DC = 1/2, from DC = 1/1 to DC = 1/4 and from DC = 1/1 to DC = by a set timer value or a transition indication message at the base station. Transition to 1/8 at a time. Another method is to transition sequentially from DC = 1/1 to DC = 1/2, from DC = 1/2 to DC = 1/4, and from DC = 1/4 to DC = 1/8 It is. The selection of the DC value can be determined in consideration of the capacity of the mobile station, the quality of the channel environment, and the like.

FIG. 6B illustrates a signal transmission diagram according to a regular or intermittent transmission pattern of an uplink DPCCH when there is no preset time DPDCH data according to another embodiment of the present invention. Reference numerals 305, 306, and 307 of FIG. 6B show gating rates different according to the ratio of DC. Reference numeral 305 denotes two consecutive power control groups at regular positions (Nos. 2 to 3 and 6 to 7) when DC = 1/2 (only 1/2 of the total power control groups in one frame). 10 to 11 and 14 to 15 power control groups). Reference numeral 306 denotes two consecutive power control groups at regular positions (Nos. 6 to 7 and 14 to 15) in the case of DC = 1/4 (only 1/4 of the total power control groups in one frame). Transmission in the power control group). Reference numeral 307 denotes two consecutive power control groups at regular positions (No. 14 to 15 power control groups) when DC = 1/8 (only one eighth of all power control groups are transmitted within one frame). It shows the transmission. In the embodiment of FIG. 6B, when the DC = 1/2 and 1/4, the intermittent transmission controller 241 of the mobile station regularly regulates the power control group of the uplink DPCCH. Depending on the power control group can be controlled. That is, in the case of DC = 1/2, two consecutive power control groups are not regularly transmitted by filtering two power control groups, but four consecutive power controls are performed by continuously intermittently intermitting any adjacent power control groups in an irregular pattern. You can also crack down on groups (e.g. powers 2 through 5).

The following cases may exist in the intermittent rate transition method, and the transition method is determined according to the system setting. One method is DC = 1/1 to DC = 1/2, DC = 1/1 to DC = 1/4, DC = 1 / by a set timer value or a transition indication message at the base station. Transition from 1 to DC = 1/8 at a time. Another method is to transition sequentially from DC = 1/1 to DC = 1/2, from DC = 1/2 to DC = 1/4, and from DC = 1/4 to DC = 1/8 It is. The selection of the DC value can be determined in consideration of the capacity of the mobile station, the quality of the channel environment, and the like.

7A and 7B illustrate that a dedicated medium access control (MAC) logical channel is generated when there is no DPDCH data for a predetermined time as shown in FIGS. 6A and 6B, and transmits a message to a physical channel uplink DPDCH. Uplink DPCCH in the case is shown. Reference numeral 311 of FIG. 7A illustrates a case where an uplink DPDCH message occurs while not performing intermittent transmission of the uplink DPCCH (that is, DC = 1/1 during continuous transmission). Reference numeral 312 illustrates a case where an uplink DPDCH message occurs during DC = 1/2 intermittent transmission of the uplink DPCCH. Reference numeral 313 illustrates a case where an uplink DPDCH message occurs during DC = 1/4 intermittent transmission of the uplink DPCCH. Reference numeral 314 illustrates a case where an uplink DPDCH message occurs during DC = 1/8 intermittent transmission of the uplink DPCCH. The power control groups indicated by reference numerals 312, 313, and 314 are transmitted according to an intermittent transmission pattern in the first frame, and when the bidirectional DPDCH is transmitted in the second frame, the power control groups in the interval are normally transmitted. In the normal transmission power control group, the TPC bit for downlink power control may be omitted, and the pilot period may be extended to be the length of the power control group and transmitted. After transmitting the uplink DPDCH message through normal transmission of the power control group, the uplink DPCCH may be transmitted without interruption from the successive power control group, and is intermittently transmitted by the original DC value until the state transition message is received from the base station. You can also continue. That is, when the uplink DPDCH message is transmitted during intermittent transmission at DC = 1/2, the DPDCH user data is present during normal transmission of the power control group in the interval and intermittent transmission at DC = 1/2. In this case, transmission is normally performed by interrupting DC = 1.

As with the uplink DPCCH, in the downlink, when the downlink DPDCH message occurs during the intermittent transmission on the DPCCH, the power control group transmitted according to the intermittent transmission pattern normally transmits the downlink DPDCH message. In the normal transmission power control group, the TPC bit for uplink power control may be omitted and the pilot section may be extended to be the length of the power control group and transmitted. After transmitting the downlink DPDCH message by normal transmission of the power control group, the downlink DPCCH may be transmitted without interruption from the successive power control group, and may be interrupted by the original DC value until the state transition request message is received from the mobile station. You can also continue to transmit. That is, when downlink DPDCH message is transmitted during intermittent transmission at DC = 1/2, normal power is transmitted to the power control group in the interval, and then intermittent transmission at DC = 1/2 is used to transmit DPDCH user data. Intermittent transmission with DC = 1, that is, normal transmission.

Reference numeral 315 of FIG. 7B illustrates a case in which an uplink DPDCH message occurs during DC = 1/2 intermittent transmission of the uplink DPCCH. Reference numeral 316 illustrates a case where an uplink DPDCH message occurs during DC = 1/4 intermittent transmission of the uplink DPCCH. Reference numeral 317 illustrates a case where an uplink DPDCH message occurs during DC = 1/8 intermittent transmission of the uplink DPCCH. The power control groups shown as reference numerals 315, 316, and 317 are transmitted according to the intermittent transmission pattern, and perform normal transmission to transmit an uplink DPDCH message. In the normal transmission power control group, the TPC bit for downlink power control may be omitted, and the pilot period may be extended to be the length of the power control group and transmitted. After transmitting the uplink DPDCH message through normal transmission of the power control group, the uplink DPCCH may be transmitted without interruption from the successive power control group, and is intermittently transmitted by the original DC value until the state transition message is received from the base station. You can also continue. That is, when the uplink DPDCH message is transmitted during the intermittent transmission at DC = 1/2, the power control group of the interval is normally transmitted, and when the intermittent transmission is performed at DC = 1/2 again, then the DPDCH user data is transmitted. Intermittent transmission with DC = 1, that is, normal transmission.

The uplink DPCCH and the downlink DPCCH may be interrupted and transmitted simultaneously in the same pattern. During the intermittent transmission of the downlink DPCCH, a message to be transmitted to the downlink DPDCH is generated, and a normal transmission of the power control group is performed to transmit the downlink DPDCH message. It is also possible to interrupt the transmission by the original DC value until the state transition receives a request message from the mobile station. That is, when downlink DPDCH message is transmitted during intermittent transmission at DC = 1/2, the power control group of the section is normally transmitted, and when intermittent transmission at DC = 1/2 is performed, then DPDCH user data is transmitted. Intermittent transmission can also be stopped with DC = 1.

8A is a diagram illustrating signal transmission of the downlink and uplink according to transmission stop of the downlink DPDCH. In the state of activating user data without uplink DPDCH, the base station and the mobile station start intermittent transmission when the downlink DPDCH stops transmitting, as indicated by reference numeral 801, when the set timer value exceeds or the downlink DPDCH message for state transition occurs. . 8A illustrates a case where a message for starting an intermittent transmission is generated at the base station, but when there is no downlink and uplink DPDCH, the mobile station may send a message requesting (requesting) to the base station. In the embodiment of FIG. 8A, a message for a state transition to a state in which there is no DPDCH user data for a predetermined time is generated at the base station. You can also send a message. In the transmission of the downlink DPCCH of FIG. 8A, all TFCI, TPC, and pilot symbols may be transmitted without interruption. Since there is a meaningless TPC value determined by measuring the power strength of the pilot symbol position of the intermitted power control group in the uplink DPCCH, the mobile station considers the intermittent pattern of the uplink DPCCH to control the uplink power. The meaningless TPC value of the TPC bits transmitted by the base station is ignored and transmitted at the same intensity as the transmission power transmitted by the previous power control group. In addition, in the transmission of the downlink DPCCH of FIG. 8A, only TFCI and TPC in the downlink DPCCH may be controlled, and pilot symbols in the downlink DPCCH may not be controlled. The interruption pattern at this time is the same as the interruption pattern of the uplink DPCCH of the mobile station. The power control group which regulates the TPC in the downlink DPCCH refers to a TPC generated by measuring a pilot symbol corresponding to the controlled power control group in the DPCCH transmitted by the mobile station.

Reference numeral 802 illustrates that a message for intermittent transmission is generated at the base station and transmitted to the mobile station through the downlink DPDCH. In this case, the mobile station which has intermittently transmitted the uplink DPCCH can stop the intermittent transmission and continue the transmission at DC = 1 after receiving the message for stopping the intermittent transmission when the uplink DPDCH data is transmitted. In addition, the mobile station performing intermittent transmission of the uplink DPCCH may continue intermittent transmission even after receiving the message for interrupting the intermittent transmission, and then interrupt the intermittent transmission at the interruption time included in the intermittent transmission interruption message and transmit DC 1. have.

FIG. 8B is a diagram illustrating signal transmission of the downlink and uplink links due to transmission stop of the uplink DPDCH. In the state of user data activation without downlink DPDCH, as indicated by reference numeral 803, the base station and the mobile station may interrupt the transmission of the uplink DPDCH when the transmission time exceeds the set timer value or exchanges state transition messages. do. 8B illustrates a case where a message for intermittent transmission is generated through a downlink DPDCH, but an intermittent transmission message may also occur in an uplink DPDCH of a mobile station. In the transmission of the downlink DPCCH of FIG. 8B, all TFCI, TPC, and pilot symbols can be transmitted without interruption. Since the TPC bit has a meaningless TPC value determined by measuring the power strength of the pilot symbol position of the intermittent power control group in the uplink DPCCH, the mobile station considers the interruption pattern of the uplink DPCCH to control the uplink power. The meaningless TPC value of the TPC bits transmitted by the base station is ignored and transmitted at the same intensity as the transmission power transmitted by the previous power control group. In addition, in the transmission of the downlink DPCCH of FIG. 8B, only TFCI and TPC may be controlled, and pilot symbols in the downlink DPCCH may not be controlled. The interruption pattern at this time is the same as the interruption pattern of the uplink DPCCH of the mobile station. The power control group which regulates the TPC in the downlink DPCCH refers to a TPC generated by measuring a pilot symbol corresponding to the controlled power control group in the DPCCH transmitted by the mobile station.

Reference numeral 804 illustrates that an intermittent transmission message is generated at the base station and transmitted to the mobile station via the downlink DPDCH. In this case, the mobile station which has intermittently transmitted the uplink DPCCH can stop the intermittent transmission and continue the transmission at DC = 1 after receiving the message for the intermittent transmission. In addition, the mobile station intermittently transmitting the uplink DPCCH may continue intermittent transmission even after receiving a message for interrupting intermittent transmission, and then interrupt intermittent transmission at the interruption time included in the intermittent transmission interruption message and transmit DC 1. .

FIG. 8C is a diagram illustrating signal transmission of the downlink and uplink links according to transmission stop of the downlink DPDCH. In the state of user data activation without uplink DPDCH, as shown by reference numeral 805, when the downlink DPDCH stops transmitting, the base station and the mobile station start intermittent transmission when the set timer value exceeds or a downlink DPDCH message occurs to start the intermittent transmission. do. In the embodiment of FIG. 8C, a message for intermittent transmission is generated in the base station, and when there is no downlink and uplink DPDCH, the mobile station may send a message requesting intermittent transmission to the base station. In the transmission of the downlink DPCCH of FIG. 8C, all TFCI, TPC, and pilot symbols may be transmitted without interruption. Since there is a meaningless TPC value determined by measuring the power strength of the pilot symbol position of the intermitted power control group in the uplink DPCCH, the mobile station considers the intermittent pattern of the uplink DPCCH to control the uplink power. The meaningless TPC value of the TPC bits transmitted by the base station is ignored and transmitted at the same intensity as the transmission power transmitted by the previous power control group. In addition, in the transmission of the downlink DPCCH of FIG. 8C, only TFCI and TPC in the downlink DPCCH may be controlled, and pilot symbols in the downlink DPCCH may not be controlled. The interruption pattern at this time is the same as the interruption pattern of the uplink DPCCH of the mobile station. The power control group which regulates the TPC in the downlink DPCCH refers to a TPC generated by measuring a pilot symbol corresponding to the controlled power control group in the DPCCH transmitted by the mobile station.

Reference numeral 806 shows that an intermittent transmission message is generated at the mobile station and transmitted to the base station via the uplink DPDCH. In this case, the mobile station which has intermittently transmitted the uplink DPCCH may stop the intermittent transmission and continue the transmission at DC = 1 after transmitting the intermittent transmission message via the uplink DPDCH. In addition, the mobile station performing intermittent transmission of the uplink DPCCH may continue intermittent transmission even after receiving the intermittent transmission interruption message, and then may interrupt the intermittent transmission at the start time included in the intermittent transmission interruption message and transmit DC 1.

FIG. 8D is a diagram illustrating signal transmission of the downlink and uplink links according to the transmission stop of the uplink DPDCH. FIG. In the user data active state without the downlink DPDCH during the set time, the base station and the mobile station exceed the set timer value or exchange the intermittent transmission messages with each other when the uplink DPDCH stops transmitting, as shown at 807. Intermittent transmission can be started. Although the embodiment of FIG. 8D illustrates a case in which a message for intermittent transmission is generated through the downlink DPDCH, the intermittent transmission message may also occur in the uplink DPDCH of the mobile station. In the transmission of the downlink DPCCH of FIG. 8D, all TFCI, TPC, and pilot symbols can be transmitted without interruption. Since there is a meaningless TPC value determined by measuring the power strength of the pilot symbol position of the intermitted power control group in the uplink DPCCH, the mobile station considers the intermittent pattern of the uplink DPCCH to control the uplink power. The meaningless TPC value of the TPC bits transmitted by the base station is ignored and transmitted at the same intensity as the transmission power transmitted by the previous power control group. In addition, in the transmission of the downlink DPCCH of FIG. 8D, only TFCI and TPC may be controlled, and pilot symbols in the downlink DPCCH may not be controlled. The interruption pattern at this time is the same as the interruption pattern of the uplink DPCCH of the mobile station. The power control group which regulates the TPC in the downlink DPCCH refers to a TPC generated by measuring a pilot symbol corresponding to the controlled power control group in the DPCCH transmitted by the mobile station.

Reference numeral 808 illustrates that a message for intermittent transmission is generated at the mobile station and transmitted to the base station via the uplink DPDCH. In this case, the mobile station which has intermittently transmitted the uplink DPCCH may stop the intermittent transmission and continue the transmission at DC = 1 after transmitting the intermittent transmission message via the uplink DPDCH. In addition, the mobile station which intermittently transmits the uplink DPCCH may continue intermittent transmission even after transmitting the intermittent transmission interruption message, and then may interrupt the intermittent transmission at the interruption time included in the intermittent transmission interruption message and transmit DC 1.

FIG. 9A is a diagram illustrating signal transmission of the downlink and uplink links due to transmission stop of the downlink DPDCH. FIG. By stopping transmission of the downlink DPDCH, the base station and the mobile station may start the intermittent transmission at a time point exceeding a set timer value or exchanging intermittent transmission messages with each other. FIG. 9A illustrates a case where downlink DPCCH 501 is regulated in the same manner as an interruption pattern with uplink DPCCH 503. Although the intermittent transmission message is generated through the downlink DPDCH in the embodiment of FIG. 9A, the intermittent transmission message may also occur through the uplink DPDCH of the mobile station.

FIG. 9B is a diagram illustrating signal transmission of the downlink and uplink links according to transmission stop of the uplink DPDCH. FIG. By stopping transmission of the uplink DPDCH, the base station and the mobile station may start the intermittent transmission at a time point exceeding the set timer value or exchanging intermittent transmission messages with each other. 9B illustrates a case where the downlink DPCCH is regulated in the same way as the uplink DPCCH. In the embodiment of FIG. 9B, a message for intermittent transmission is shown through a downlink DPDCH, but the intermittent transmission message may also occur through an uplink DPDCH of a mobile station.

In the drawings and the description above, the starting points of the downlink and uplink frames are identically illustrated. However, in the actual UMTS system, the uplink frame start time is artificially delayed by 250 microseconds from the downlink frame start time. This is to make the power control time delay into one slot (1 slot = 0.625ms) in consideration of the propagation delay of the transmission signal when the cell radius is smaller than about 30 km.

According to an embodiment of the present invention, when a message for intermittent transmission is transmitted in a state in which traffic data is not transmitted on a DPDCH for a preset time, a power control rate and a power control delay can be reduced by changing the gating rates of the downlink and the uplink. This can be seen in the following figure.

First, a description will be given of signal transmission according to a case in which a message is transmitted on the uplink in a state in which traffic data is not transmitted on a DPDCH for a preset time.

First, FIG. 10A is a signal transmission diagram of downlink and uplink having the same gating rate when a message for intermittent transmission is transmitted on the uplink in a state in which traffic data is not transmitted on the DPDCH for a preset time. That is, FIG. 10A shows a gating rate of the same downlink and uplink when a message for intermittent transmission is transmitted on the uplink while traffic data is not transmitted on the DPDCH for a preset time.

Referring to FIG. 10A, when a DPDCH is transmitted in the uplink, a DPCCH including TFCI, pilot symbol, and TPC is continuously transmitted. On the other hand, when the DPDCH is not transmitted, the DPCCH is intermittently transmitted according to the gating rate. The power control rate of the uplink is determined by the gating rate of the downlink. Reference numeral 1001 denotes a case where the gating rate of the downlink is 1/1, and the power control rate of the uplink is 1600 Hz. Reference numeral 1003 denotes a case in which the downlink gating rate is 1/2, and the uplink power control rate is 800 Hz. Reference numeral 1005 denotes a case in which the downlink gating rate is 1/4, and the uplink power control rate is 400 Hz. Reference numeral 1007 denotes a case where the gating rate of the downlink is 1/8, so that the power control rate of the uplink is 200 Hz.

Secondly, FIG. 10B illustrates a first embodiment of downlink and uplink signal transmission having different gating rates when a message for intermittent transmission is transmitted on the uplink while traffic data is not transmitted on the DPDCH for a preset time. The figure is shown. That is, FIG. 10B illustrates an example in which the gating rates of the downlink and the uplink are differently transmitted, and the gating rate of the downlink is set to 1.

Referring to FIG. 10B, when a message is not transmitted on the uplink, the uplink power control rate is 1600 Hz, 800 Hz, as the gating rates of the uplink are changed to 1, 1/2, 1/4, and 1/8. If the message is 400Hz and 200Hz, but the message is transmitted on the DPDCH, it can be seen that the power control rate of the uplink becomes 1600Hz regardless of the uplink gating rate. It can also be seen that the power control delays of the downlink and uplink are minimized regardless of the uplink gating position (pattern).

Thirdly, FIG. 10C illustrates a second embodiment of downlink and uplink signal transmission having different gating rates when a message for intermittent transmission is transmitted on the uplink while traffic data is not transmitted on the DPDCH for a preset time. The figure is shown. That is, FIG. 10C illustrates an embodiment in which the gating rates of the downlink and the uplink are differently transmitted, and the gating rate of the downlink is 1/2.

Referring to FIG. 10C, when the message is not transmitted on the uplink, the uplink power control rate is 1600 Hz, 800 Hz, as the gating rates of the uplink are changed to 1, 1/2, 1/4, and 1/8. If the message is 400Hz, 200Hz, but the message is transmitted on the DPDCH, the power control rate of the uplink is 800Hz regardless of the gating rate of the uplink.

Next, a signal transmission diagram according to a case in which a message for intermittent transmission is transmitted on the uplink while no traffic data is transmitted on the DPDCH for a preset time will be described.

First, FIG. 11A illustrates downlink and uplink signal transmissions having the same gating rate when a message for intermittent transmission is transmitted on the downlink in a state where no traffic data is transmitted on the DPDCH for a preset time. That is, FIG. 11A shows the same downlink and uplink gating rates when the intermittent transmission transmits a message on the downlink in a state where no traffic data is transmitted on the DPDCH for a preset time.

Referring to FIG. 11A, when the DPDCH is transmitted on the downlink, the DPCCH of the downlink consisting of TFCI, pilot symbol, and TPC is continuously transmitted, and when the DPDCH is not transmitted, the DPCCH is intermittently transmitted according to the gating rate. It is done. The power control rate of the downlink is determined by the gating rate of the uplink. Reference numeral 1101 denotes a gating rate of the uplink being 1/1, and a power control rate of the downlink is 1600 Hz, and reference numeral 1103 is a case where the uplink gating rate is 1/2, and the power control rate of the downlink is 800 Hz. . Reference numeral 1105 denotes a case where the uplink gating rate is 1/4, and the downlink power control rate is 400 Hz. Reference numeral 1107 denotes a case in which the gating rate of the uplink is 1/8, and the power control rate of the downlink becomes 200 Hz.

Secondly, FIG. 11B illustrates a first embodiment of downlink and uplink signal transmission having different gating rates when a message for intermittent transmission is transmitted on the downlink in a state where no traffic data is transmitted on the DPDCH for a preset time. The figure is shown. That is, FIG. 11B illustrates an embodiment in which the gating rates of the downlink and the uplink are differently transmitted, and the gating rate of the uplink is set to 1.

Referring to FIG. 11B, when the message is not transmitted on the downlink, as the gating rate of the uplink changes to 1, 1/2, 1/4, and 1/8, the power control rate of the downlink is 1600Hz, 800Hz, It becomes 400Hz, 200Hz. However, when the message is transmitted on the DPDCH, it can be seen that the power control rate of the downlink becomes 1600 Hz regardless of the gating rate of the downlink. It can also be seen that the power control delay of the downlink and uplink is minimized regardless of the gating position (pattern) of the downlink.

Thirdly, FIG. 11C illustrates a second embodiment of downlink and uplink signal transmission having different gating rates when a message for intermittent transmission is transmitted on the downlink while no traffic data is transmitted on the DPDCH for a preset time. The figure is shown. That is, FIG. 11C illustrates an embodiment in which the gating rates of the downlink and the uplink are differently transmitted, and the gating rate of the uplink is 1/2.

Referring to FIG. 11C, when a message is not transmitted on the downlink, the downlink power control rate is 1600 Hz, 800 Hz, as the gating rate of the downlink varies to 1, 1/2, 1/4, 1/8. It is 400Hz and 200Hz, but when the message is transmitted on the DPDCH, the power control rate of the downlink becomes 800Hz regardless of the gating rate of the downlink.

If the cell radius is very large, the propagation delay is increased in the terminal near the edge of the cell, so that the power control delay of the downlink / uplink is also increased. In this case, the power control delay value of the downlink / uplink may vary according to the gating rate and the relative gating position of the downlink and the uplink while traffic data is not transmitted to the DPDCH for a preset time. Therefore, the base station needs to change the gating position (pattern) of the downlink or uplink to estimate the propagation delay of the terminal so that the power control delay of both the downlink and uplink can be minimized. The method of changing the gating position may fix the gating position of the uplink and change the gating position of the downlink. Conversely, the gating position of the downlink may be fixed and the gating position of the uplink may be changed.

12a-up of FIG. 12a shows that when a propagation delay is large, the power control delay may be small in one direction but very large in the other direction in the case of a specific gating position (pattern). 12a-up, when there is no DPDCH of the downlink, the pilot symbol of the downlink 1201 is measured for downlink power control, and the TPC of 1207 is generated. Control is made. In this case, the power control delay is 7 slots. In the absence of the downlink DPDCH, uplink power control is performed at 1207 when the TPC symbol 1201 is generated by measuring the pilot symbol of the uplink 1203 for the uplink power control and then goes down to the downlink. In this case, the power control delay is three slots. 12a-up, if there is a downlink DPDCH, the downlink power control measures the pilot symbol of the downlink 1211 to generate the TPC of the uplink 1212, and then goes up the uplink 1212 for downlink power control. At downlink power control is achieved. In this case, the downlink power control delay is 4 slots.

12a-down of FIG. 12a shows that even if the propagation delay is large, a well-set gating position (pattern) has a balanced power control delay in the bidirectional link. In FIG. 12A-Down, when there is no DPDCH of the downlink, a pilot symbol of the downlink of reference number 1223 is measured for downlink power control, and a TPC of reference number 1225 is generated, and then the downlink power is increased from the reference number 1227. Control is made. In this case, the downlink power control delay is three slots. In the absence of the downlink DPDCH, the uplink power control is performed at 1225 when the downlink is generated after measuring the pilot symbol of the uplink 1221 and generating the TPC 1223 for the uplink power control. In this case, the power control delay is three slots. In FIG. 12a-down, when there is a downlink DPDCH, the pilot symbol of the downlink of reference number 1231 is measured for downlink power control, and the TPC of the downlink of reference number 1233 is generated. At downlink power control is achieved. In this case, the downlink power control delay is 3 slots.

In the case of the uplink DPDCH in 12b-up of FIG. 12B, the pilot symbol of the uplink of 1242 is measured for uplink power control, and the downlink is generated after generating the TPC of the uplink of 1243. Uplink power control is made at number 1245. In this case, the uplink power control delay is one slot.

In the case of the uplink DPDCH in 12b-down of FIG. 12B, the uplink pilot symbol of the uplink reference number 1125 is measured to generate the downlink TPC of the downlink 1253 for uplink power control. Uplink power control is made at number 1255. In this case, the uplink power control delay is 2 slots.

As shown in FIGS. 12A-up and 12B-up, when the positions of the downlink and uplink slots are similar, the downlink power control delay when the message is not transmitted is 7 slots, and the uplink power control delay is 3 slots. to be. In contrast, when the message is transmitted, the downlink power control delay is 4 slots and the uplink power control delay is 1 slot. 12a-down and 12b-down, when the positions of the downlink and uplink slots are staggered, the downlink power control delay is 3 slots and the uplink power control delay is 3 slots when no message is transmitted. to be. In contrast, when the message is transmitted, the downlink power control delay is three slots and the uplink power control delay is two slots.

As shown in the above embodiment, when the propagation delay is large, staggering the positions of the slots of the downlink and uplink can reduce the power control delay when there is no message, and the downlink and uplink Power control delay can be balanced.

2. Application example of synchronous method

Next, an embodiment of the present invention to be applied to a mobile communication system using a synchronization method will be described in detail with reference to the accompanying drawings (FIGS. 4C, 4D, 5C, and 13A to 116B).

An embodiment according to the present invention to be described below may be applied to a mobile communication system of a synchronous (CDMA2000) method, wherein the frame length is 20 msec, and there are 16 power control groups in one frame. That is, the length of the power control group is 1.25 msec, and the frame length of the dedicated control channel can be both 5 msec and 20 msec. It will be noted, however, that the above values are selected only for the purpose of explanation of the invention and are not essential.

Hardware diagram of a synchronous mobile communication system according to an embodiment of the present invention is as follows.

4c illustrates a brief configuration of a base station transmitter in a synchronous mobile communication system according to an embodiment of the present invention. The difference between the conventional base station transmitter configuration shown in FIG. 3C is that the outputs of the amplifiers 142, 143, 144, and 145 for the forward-dedicated control channel (F-DCCH) are controlled by the Gated Transmission Controller 190 and the interrupters 192 and 193. , 194, 195. That is, the Gated Transmission Controller 190 transmits the reverse power control bits only in the power control group or time slots promised to the mobile station when the forward and reverse dedicated control channels are not active in the control hold state / normal negative state. . When the reverse control channel is not activated in the control hold state / normal negative state, only the reverse power control bit in the forward power control group selected by the same pattern as the discontinuous transmission pattern of the reverse pilot / PCB channel is transmitted. The reverse intermittent transmission pattern and the forward intermittent transmission pattern are independent of each other. In the same pattern, an offset may exist between the two for efficient power control. The above offset is given as a system parameter.

4D illustrates a simplified configuration of a mobile station transmitter in a synchronous mobile communication system according to an embodiment of the present invention. The difference from the conventional mobile station transmitter configuration shown in FIG. 3D is that there is an interrupter 232 for intermittent transmission of reverse pilot / PCB channels and an intermittent transmission controller 290 for controlling the interrupter 232. Since the transmission of the reverse pilot / PCB channel is essential for the synchronous detection, there can be no transmission of another reverse channel in the period where the transmission of the channel is stopped.

In the synchronous mobile communication system according to an embodiment of the present invention, a transmission signal configuration diagram of a base station and a mobile station is as follows.

Reference numerals 320, 322, and 324 of FIG. 5C are signal transmission diagrams according to a regular / intermittent transmission pattern of a reverse pilot / PCB channel in a control holding state / normal sub state according to an embodiment of the present invention. 320 is a power control group (or a case where a duty cycle (hereinafter referred to as DC) in a control holding state / normal negative state is 1/2 (only one half of the entire power control group in one frame is transmitted) (or Regular transmission of the signals of the reverse pilot / PCB channel. 322 is a regular reverse pilot / PCB in one power control group per four power control groups in case of DC = 1/4 (only one quarter transmission of all power control groups in one frame) in the control hold state / normal negative state. It illustrates the transmission of a signal of a channel. 324 is a regular reverse pilot / PCB in one power control group per eight power control groups when DC = 1/8 (only one eighth of all power control groups in one frame) in the control hold state / normal negative state. It illustrates the transmission of a signal of a channel. In the state transition method, the following cases may exist, and the transition method is determined according to the system setting. One method is from DC = 1/1 to DC = 1/2, from DC = 1/1 to DC = 1/4 and from DC = 1/1 to DC = by a set timer value or a transition indication message at the base station. Transition to 1/8 at a time. Another method is to transition sequentially from DC = 1/1 to DC = 1/2, from DC = 1/2 to DC = 1/4 and from DC = 1/4 to DC = 1/8 It is a transition.

Reference numerals 340, 342, and 344 of FIG. 5C are signal transmission diagrams according to an irregular / intermittent transmission pattern of a reverse pilot / PCB channel in a control holding state / normal sub state according to another embodiment of the present invention. 340 selects any one power group from the two power control groups in the case of DC = 1/2 (only 1/2 of the total power control groups in one frame) in the control holding state / normal negative state and the power group. Illustrates the transmission of signals in the reverse pilot / PCB channel at. 342 is a reverse pilot / PCB in any one power control group per four power control groups in the case of DC = 1/4 in control hold / normal negative state (only 1/4 of the total power control groups in a frame). It illustrates the transmission of a signal of a channel. 344 shows transmission from any one power control group per eight power control groups when DC = 1/8 (only one eighth of all power control groups in one frame) in the control hold / normal negative state. It is. In the state transition method, the following cases may exist, and the transition method is determined according to the system setting. One method is from DC = 1/1 to DC = 1/2, from DC = 1/1 to DC = 1/4 and from DC = 1/1 to DC = by a set timer value or a transition indication message at the base station. Transition to 1/8 at a time. Another method is to transition sequentially from DC = 1/1 to DC = 1/2, from DC = 1/2 to DC = 1/4 and from DC = 1/4 to DC = 1/8 It is a transition.

Reference numerals 360, 362, and 364 of FIG. 5C are signal transmission diagrams according to a regular / intermittent transmission pattern of a reverse pilot / PCB channel in a control holding state / normal sub state according to another embodiment of the present invention. 360 is four consecutive power control groups including the same number of power control groups in the case of DC = 1/2 (only 1/2 of the total power control groups in one frame) in the control hold state / normal negative state. Shows transmission at a regular location. 362 shows the transmission of two consecutive power control groups at regular positions in the case of DC = 1/4 (only 1/4 of the entire power control group in one frame) in the control hold state / normal negative state. It is. 364 shows the transmission of one continuous power control group at a regular position when DC = 1/8 (only one eighth of all power control groups in one frame) in the control hold state / normal negative state. It is. As the duty cycle decreases to 1/2, 1/4, and 1/8, the number of power control groups included in the continuous power control group decreases by half. In the state transition method, the following cases may exist, and the transition method is determined according to the system setting. One method is from DC = 1/1 to DC = 1/2, from DC = 1/1 to DC = 1/4 and from DC = 1/1 to DC = by a set timer value or a transition indication message at the base station. Transition to 1/8 at a time. Another method is to transition sequentially from DC = 1/1 to DC = 1/2, from DC = 1/2 to DC = 1/4 and from DC = 1/4 to DC = 1/8 It is a transition.

Reference numerals 380, 382, and 384 of FIG. 5C are signal transmission diagrams according to a predetermined regular / intermittent transmission pattern of a reverse pilot / PCB channel in a control hold state / normal sub state according to another embodiment of the present invention. 380 continually transmits half of the entire power control group in the second half of the frame in the case of DC = 1/2 (only half of the entire power control group in one frame) in the control hold state / normal negative state. It is shown. 382 indicates that 1/4 of the total power control group starts from 3/4 of the frame when DC = 1/4 (only 1/4 of the total power control group in a frame is transmitted) in the control hold state / normal negative state. It shows continuous transmission. 384 indicates that 1/8 of the entire power control group starts from 7/8 of the frame when DC = 1/8 (only 1/8 of the entire power control group in one frame is transmitted) in the control holding state / normal negative state. It shows continuous transmission. As the duty cycle decreases to 1/2, 1/4, and 1/8, the number of power control groups included in the continuous power control group decreases by half. The following cases may exist in the state transition method, and the transition method is determined according to the system setting. One method is from DC = 1/1 to DC = 1/2, from DC = 1/1 to DC = 1/4 and from DC = 1/1 to DC = by a set timer value or a transition indication message at the base station. Transition to 1/8 at a time. Another method is to transition sequentially from DC = 1/1 to DC = 1/2, from DC = 1/2 to DC = 1/4 and from DC = 1/4 to DC = 1/8 It is a transition.

13A, 13B, 13C, and 13D according to the present invention, and the reverse dedicated control channel shown in FIGS. 15A, 15B, and 15C are the same as the conventional method, the unit of the reverse dedicated control channel (R-DCCH) frame length (5 msec). It can exist in four places (0/5/10/15 msec) within the basic frame length (20 msec).

400A, 420, 422, and 424 of FIG. 13A show a dedicated MAC logical channel dmch in the control hold state / normal negative state for the case of 300, 320, 322, and 324 of FIG. 5C, and transmits it to the physical channel R-DCCH. The case of R-DCCH is shown. 400 is not exceeding R within 5 msec, which is the frame length of one reverse dedicated control channel (R-DCCH) at the latest, such as 412 after the occurrence of the dmch message during non-intermittent transmission (during continuous transmission, DC = 1/1). Activating the DCCH shows sending a dmch message. 420 illustrates transmitting the dmch message by activating the R-DCCH within 5 msec as late as 414 after the occurrence of the dmch message during intermittent transmission at DC = 1/2. 422 illustrates transmitting the dmch message by activating the R-DCCH within 5 msec at the latest, such as 416, after dmch generation during intermittent transmission at DC = 1/4. 424 illustrates transmitting the dmch message by activating the R-DCCH within 5 msec at the latest as 418 after dmch generation during intermittent transmission at DC = 1/8. Even in the case of the power control group not transmitting in the intermittent transmission pattern as in 420, 422, and 424, when the R-DCCH is transmitted within the interval, the power control group in the interval is activated. In the activated power control group, a forward power control bit (PCB) may be omitted, and the pilot period may be extended to be the length of the power control group and transmitted.

If it is necessary to transmit the R-DCCH during intermittent transmission, the preamble (Am) and post-amble (back-and-back) before and after the R-DCCH so that the base station can estimate the channel more accurately and receive the R-DCCH. Add by activating and transmitting the pilot / PCB channel. In a period serving as the preamble and postamble in the reverse pilot / PCB channel, the forward power control bit (PCB) may be omitted, and the pilot period may be extended to be the length of the power control group and transmitted. The number F (≧ 0) of the preamble and the number B (≧ 0) of the postamble are given as system parameters. In all embodiments of the present invention, only F = 1 and B = 1 will be described and illustrated. When the power control group scheduled to be transmitted in the intermittent transmission pattern is included in the preamble and the postamble, the forward power control bit cannot be omitted. In 420 and 422, a predetermined power control group is used as a preamble. Since there is no scheduled power control group at 424, the preamble is activated as shown at 425. In 420, 422, and 424, since there is no power control group scheduled in the postamble section, the postamble is activated as shown in 415, 417, and 419, respectively.

The R-DCCH transmits with increased transmission power than when continuously transmitting (DC = 1/1) by the system parameter ΔP. Channel estimation uses the added preamble and postamble, but the search or tracking process for synchronization in the control hold state is performed using the power control group scheduled to be activated.

400, 440, 442, and 444 of FIG. 13B show a dedicated MAC logical channel dmch in the control hold state / normal negative state for the case of 300, 340, 342, and 344 of FIG. 3, and transmits it to the physical channel R-DCCH. The case of R-DCCH is shown. 400 is not exceeding R within 5 msec, which is the frame length of one reverse dedicated control channel (R-DCCH) at the latest, such as 412 after the occurrence of the dmch message during non-intermittent transmission (during continuous transmission, DC = 1/1). Activating the DCCH shows sending a dmch message. 440 illustrates transmitting the dmch message by activating the R-DCCH within 5 msec as late as 434 after generating the dmch message during intermittent transmission at DC = 1/2. 442 illustrates transmitting the dmch message by activating the R-DCCH within 5 msec at the latest as 436 after dmch generation during intermittent transmission at DC = 1/4. 444 illustrates transmitting the dmch message by activating the R-DCCH within 5 msec at the latest, such as 438, after dmch generation during intermittent transmission at DC = 1/8. Even in the case of the power control group not transmitting in the intermittent transmission pattern as in 440, 442, and 444, when the R-DCCH is transmitted within the interval, the power control group in the interval is activated. In the activated power control group, the forward power control bit (PCB) may be omitted and the pilot period may be extended to be the length of the power control group and transmitted.

If it is necessary to transmit the R-DCCH during intermittent transmission, the reverse pilot before and after the R-DCCH is used to pre-amble and post-amble the R-DCCH so that the base station can accurately estimate the channel. Add by enabling and transmitting the PCB channel. In a period serving as the preamble and postamble in the reverse pilot / PCB channel, the forward power control bit (PCB) may be omitted and the pilot period may be extended to be the length of the power control group and transmitted. The number F (≧ 0) of the preamble and the number B (≧ 0) of the postamble are given as system parameters. In all embodiments of the present invention, only F = 1 and B = 1 will be described and illustrated. When the power control group scheduled to be transmitted in the intermittent transmission pattern is included in the preamble and the postamble, the forward power control bit cannot be omitted. In 440, the predetermined power control group is used as a preamble and a postamble. In 442, the predetermined power control group is used as a postamble. The preamble is activated as in 443. At 444, the preamble and postamble are activated as shown in 445 and 439 because the predetermined power control group is not in the preamble and postamble section.

The R-DCCH transmits with increased transmission power than when continuously transmitting (DC = 1/1) by the system parameter ΔP. Channel estimation uses the added preamble and postamble, but the search or tracking process for synchronization in the control hold state is performed using the power control group scheduled to be activated.

400, 460, 462, and 464 of FIG. 13C are used to generate a dedicated MAC logical channel dmch in the control hold state / normal negative state for the case of 300, 360, 362, and 364 of FIG. In this case, possible positions of the R-DCCH are shown. 400 is not exceeding R within 5 msec, which is the frame length of one reverse dedicated control channel (R-DCCH) at the latest, such as 412 after the occurrence of the dmch message during non-intermittent transmission (during continuous transmission, DC = 1/1). Activating the DCCH shows sending a dmch message. 460 illustrates transmitting the dmch message by activating the R-DCCH within 5 msec as late as 454 after generating the dmch message during intermittent transmission at DC = 1/2. 462 illustrates transmitting the dmch message by activating the R-DCCH within 5 msec at the latest, such as 456, after the occurrence of dmch during intermittent transmission at DC = 1/4. 464 illustrates transmitting the dmch message by activating the R-DCCH within 5 msec at the latest, such as 458, after dmch generation during intermittent transmission at DC = 1/8. Even if the power control group does not transmit in the intermittent transmission pattern as in 460, 462, and 464, when the R-DCCH is transmitted within the interval, the power control group in the interval is activated. In the activated power control group, the forward power control bit (PCB) may be omitted and the pilot section may be extended to be the length of the power control group and transmitted.

If it is necessary to transmit the R-DCCH during intermittent transmission, the reverse pilot before and after the R-DCCH is used to pre-amble and post-amble the R-DCCH so that the base station can accurately estimate the channel. Add by enabling and transmitting the PCB channel. In a period serving as the preamble and postamble in the reverse pilot / PCB channel, the forward power control bit (PCB) may be omitted, and the pilot section may be extended to be a power control group length. The number F (≧ 0) of the preamble and the number B (≧ 0) of the postamble are given as system parameters. In all embodiments of the present invention, only F = 1 and B = 1 will be described and illustrated. When the power control group scheduled to be transmitted in the intermittent transmission pattern is included in the preamble and the postamble, the forward power control bit cannot be omitted. In 460, the predetermined power control group is used as a preamble and a postamble. In 460, since the predetermined power control group is not in the preamble and postamble section, the preamble and the postamble are activated as in 461 and 455. In 462, since the predetermined power control group is not in the preamble and postamble section, the preamble and the postamble are activated as shown in 463 and 457. In 464, since the predetermined power control group is not in the preamble and postamble section, the preamble and the postamble are activated as shown in 465 and 459.

The R-DCCH transmits with increased transmission power than when continuously transmitting (DC = 1/1) by the system parameter ΔP. Channel estimation uses the added preamble and postamble, but the search or tracking process for synchronization in the control hold state is performed using the power control group scheduled to be activated.

400, 480, 482, and 484 of FIG. 13D show a dedicated MAC logical channel dmch in the control hold state / normal negative state for the case of 300, 380, 382, and 384 of FIG. In this case, possible positions of the R-DCCH are shown. 400 is not exceeding R within 5 msec, the length of one reverse dedicated control channel (R-DCCH) frame, such as 412 after the occurrence of the dmch message during non-intermittent transmission (during continuous transmission, when DC = 1/1). Activating the DCCH shows sending a dmch message. 480 illustrates transmitting the dmch message by activating the R-DCCH within 5 msec as late as 474 after generating the dmch message during intermittent transmission at DC = 1/2. 482 illustrates transmitting the dmch message by activating the R-DCCH within 5 msec at the latest, such as 476, after dmch generation during intermittent transmission at DC = 1/4. 484 illustrates transmitting a dmch message by activating the R-DCCH within 5 msec at the latest, such as 478, after dmch generation during intermittent transmission at DC = 1/8. Even if the power control group does not transmit in the intermittent transmission pattern as in 480, 482, and 484, when the R-DCCH is transmitted within the interval, the power control group in the interval is activated. In the activated power control group, the forward power control bit (PCB) may be omitted and the pilot period may be extended to be the length of the power control group and transmitted.

If it is necessary to transmit the R-DCCH during intermittent transmission, the reverse pilot before and after the R-DCCH is used to pre-amble and post-amble the R-DCCH so that the base station can accurately estimate the channel. Add by enabling and transmitting the PCB channel. In a period serving as the preamble and postamble in the reverse pilot / PCB channel, the forward power control bit (PCB) may be omitted, and the pilot period may be extended to be the length of the power control group and transmitted. The number F (≧ 0) of the preamble and the number B (≧ 0) of the postamble are given as system parameters. In all embodiments of the present invention, only F = 1 and B = 1 will be described and illustrated. When the power control group scheduled to be transmitted in the intermittent transmission pattern is included in the preamble and the postamble, the forward power control bit cannot be omitted. In 480, the predetermined power control group is used as a postamble. The preamble is activated as shown in 481. In 482, since the predetermined power control group is not in the preamble and postamble section, the preamble and the postamble are activated as shown in 483 and 477. In 484, since the scheduled power control group is not in the preamble and postamble section, the preamble and the postamble are activated as shown in 485 and 479.

The R-DCCH transmits with increased transmission power than when continuously transmitting (DC = 1/1) by the system parameter ΔP. Channel estimation uses the added preamble and postamble, but the search or tracking process for synchronization in the control hold state is performed using the power control group scheduled to be activated.

14A to 14C, it is possible to reduce the power control rate and the power control delay by varying the gating rates in the forward and reverse directions when transmitting a message for state transition in the control holding state according to an embodiment of the present invention. It is seen in 15a-15c. 16A and 16B will be described with reference to FIGS. 16A and 16B that power control delays can be reduced or power control delays can be balanced in a bidirectional link by changing forward and reverse interruption patterns in the control holding state. In the drawings to be described below, reference numeral FL denotes a forward link and RL denotes a reverse link.

14A to 14C are signal transmission diagrams when the reverse dedicated control channel is not activated or not in the control holding state according to the present invention.

14A is a signal transmission diagram of the forward and reverse links having the same gating rate when the reverse dedicated control channel is not activated or not in the control holding state. That is, FIG. 14A is a signal transmission diagram according to a gating rate of the same forward link and reverse link when the reverse dedicated control channel is activated or not in the control holding state.

Referring to FIG. 5A, when a reverse dedicated control channel (R-DCCH) is activated on a reverse link, a reverse pilot channel consisting of a pilot symbol and a PCB is continuously transmitted. On the other hand, when the reverse dedicated control channel is not activated, the reverse pilot channel is intermittently transmitted according to the gating rate. The power control rate of the reverse link is determined by the gating rate of the forward link. Reference numeral 500 denotes a case in which the gating rate of the forward link is 1/1, and the power control rate of the reverse link is 800 Hz. Reference numeral 506 denotes a case in which the gating rate of the forward link is 1/2, and the power control rate of the reverse link is 400 Hz. Reference numeral 512 denotes a case in which the gating rate of the forward link is 1/4, and the power control rate of the reverse link is 200 Hz. Reference numeral 518 denotes a case in which the gating rate of the forward link is 1/8, so that the power control rate of the reverse link is 100 Hz.

Referring to the case in which the reverse dedicated control channel is not activated in the control holding state, in FIG. 14A, when the gating ratio of the forward and reverse links is 1/1, the reverse pilot channel (Pilot PCB) consisting of a pilot symbol and a PCB on the reverse link is shown. The signal is transmitted in all eight Power Control Groups (PCGs) (Nos. 8-15). That is, since the signal of the reverse pilot channel is transmitted for each power control group having a length of 1.25 msec on the reverse link, the reverse power control rate is 800 Hz. If the gating rate of the forward and reverse links is 1/2, the reverse pilot channel (Pilot PCB) consisting of the pilot symbol and the PCB on the reverse link has four power control groups (Nos. 9, 11, 13). And 15 only). That is, since the signal of the reverse pilot channel is transmitted in the 2.5msec unit on the reverse link, the reverse power control rate is 400Hz. If the gating rate of the forward and reverse links is 1/4, the reverse pilot channel (Pilot PCB), consisting of the pilot symbol and the PCB on the reverse link, is the only one of the two power control groups (Nos. 11 and 15) out of the eight power control groups. Is sent. That is, since the signal of the reverse pilot channel is transmitted in the unit of 5.0 msec on the reverse link, the reverse power control rate is 200 Hz. If the gating rate of the forward and reverse links is 1/8, the reverse pilot channel (Pilot PCB) consisting of a pilot symbol and a PCB on the reverse link is transmitted in only one power control group (No. 15) out of eight power control groups. That is, since the signal of the reverse pilot channel is transmitted in 10.0 msec units on the reverse link, the reverse power control rate is 100 Hz. The same power control rate is obtained even when the reverse dedicated control channel is activated.

FIG. 14B is a diagram illustrating a first embodiment of forward and reverse link signal transmission having different gating rates when the reverse dedicated control channel (R-DCCH) is not activated or not in the control hold state. That is, FIG. 5B illustrates an embodiment in which the gating rates of the forward link and the reverse link are differently transmitted when the reverse dedicated control channel is not activated or not in the control holding state. .

Referring to FIG. 14B, when the reverse dedicated control channel is not activated, the gating rate of the reverse link is changed to 1, 1/2, 1/4, 1/8, and the power control rate of the reverse link is 800 Hz, 400 Hz, It becomes 200Hz, 100Hz. On the other hand, when the reverse dedicated control channel is activated, it can be seen that the power control rate of the reverse link becomes 800 Hz regardless of the gating rate of the reverse link. In addition, it can be seen that the power control delay of the forward link and the reverse link is minimized regardless of the gating rate of the reverse link.

Specifically, a case in which the reverse dedicated control channel is not activated in the control holding state will be described. Referring to FIG. 5B, when the gating rate of the reverse link is 1/1, a reverse pilot channel consisting of a pilot symbol and a PCB in the reverse link (Pilot PCB) ) Signal is transmitted in all eight power control groups (No. 8-15). That is, since the signal of the reverse pilot channel is transmitted for each power control group having a length of 1.25 msec on the reverse link, the reverse power control rate is 800 Hz. If the gating rate of the reverse link is 1/2, the reverse pilot channel (Pilot PCB), consisting of the pilot symbol and the PCB on the reverse link, will ignore the propagation delays. , 13, and 15 only). That is, since the signal of the reverse pilot channel is transmitted in the 2.5msec unit on the reverse link, the reverse power control rate is 400Hz. If the gating rate of the reverse link is 1/4, the reverse pilot channel (Pilot PCB), consisting of the pilot symbol and the PCB on the reverse link, will ignore the propagation delays. Is sent only once). That is, since the signal of the reverse pilot channel is transmitted in the unit of 5.0 msec on the reverse link, the reverse power control rate is 200 Hz. If the gating rate of the reverse link is 1/8, the reverse pilot channel (Pilot PCB), consisting of the pilot symbol and the PCB on the reverse link, only ignores the propagation delay. Is sent. That is, since the signal of the reverse pilot channel is transmitted in 10.0 msec units on the reverse link, the reverse power control rate is 100 Hz.

FIG. 14C illustrates a second embodiment of forward and reverse link signal transmissions having different gating rates when the reverse dedicated control channel (R-DCCH) is not activated or not in the control hold state. That is, FIG. 14C illustrates an embodiment in which the gating rates of the forward link and the reverse link are differently transmitted, and the gating rate of the forward link is 1/2.

Referring to FIG. 14C, when the reverse dedicated control channel is not activated, the gating rate of the reverse link is changed to 1, 1/2, 1/4, 1/8, and the power control rate of the reverse link is 400 Hz, 400 Hz, It becomes 200Hz, 100Hz. On the other hand, when the reverse dedicated control channel is activated, it can be seen that the power control rate of the reverse link becomes 400 Hz regardless of the gating rate of the reverse link.

Referring to the case in which the reverse dedicated control channel is not activated in the control holding state, specifically, when the gating rate of the reverse link is 1/1 in FIG. 14C, a reverse pilot channel (Pilot PCB) consisting of a pilot symbol and a PCB in the reverse link is used. Signal is transmitted in all four power control groups (Nos. 9, 11, 13 and 15) in which signals are transmitted according to the gating rate of the forward link. That is, since the signal of the reverse pilot channel is transmitted to each power control group having a length of 2.5 msec on the reverse link, the reverse power control rate is 400 Hz. If the gating rate of the reverse link is 1/2, the reverse pilot channel (Pilot PCB) consisting of a pilot symbol and a PCB on the reverse link has four power control groups (Nos. 9, 11, 13, and 8). 15). That is, since the signal of the reverse pilot channel is transmitted in the 2.5msec unit on the reverse link, the reverse power control rate is 400Hz. If the gating rate of the reverse link is 1/4, a reverse pilot channel (Pilot PCB) consisting of a pilot symbol and a PCB on the reverse link is transmitted in two power control groups (No. 11 and 15) out of eight power control groups. . That is, since the signal of the reverse pilot channel is transmitted in the unit of 5.0 msec on the reverse link, the reverse power control rate is 200 Hz. When the gating rate of the reverse link is 1/8, a reverse pilot channel (Pilot PCB) consisting of a pilot symbol and a PCB on the reverse link is transmitted only from one power control group (No. 15) among the eight power control groups. That is, since the signal of the reverse pilot channel is transmitted in 10.0 msec units on the reverse link, the reverse power control rate is 100 Hz.

15A to 15C are signal transmission diagrams when the forward dedicated control channel is not activated or not in the control holding state according to the present invention.

15A is a signal transmission diagram according to the same forward and reverse gating rates when the forward dedicated control channel is not activated or not in the control holding state.

Referring to FIG. 15A, when the forward dedicated control channel is activated, the PCB is continuously transmitted. On the other hand, when the forward dedicated control channel is not activated, it is intermittently transmitted according to the gating rate. The power control rate of the forward link is determined by the gating rate of the reverse link. Reference numeral 603 denotes a case in which the gating rates of the forward and reverse links are set to 1, and the power control rate of the forward link is 800 Hz. This is because, in the forward link, the PCB signals are all transmitted from the 8th to 15th power control groups. Reference numeral 609 denotes a case in which the gating rates of the forward and reverse links are 1/2, and the power control rate of the forward link is 400 Hz. This is because the PCB signal in the forward link is transmitted from the 9th, 11th, 13th and 15th power control groups. Reference numeral 615 denotes a case in which the gating rates of the forward and reverse links are 1/4, and the power control rate of the forward link is 200 Hz. This is because, in the forward link, the PCB signal is transmitted from the 11th and 15th power control groups. Reference numeral 621 denotes a case in which the gating rates of the forward and reverse links are set to 1/8, and the power control rate of the forward link is 100 Hz. This is because the PCB signal in the forward link is transmitted only in the 15th power control group.

FIG. 15B is a diagram illustrating a first embodiment of forward and reverse link signal transmission having different gating rates when the forward dedicated control channel is not activated or not in the control holding state. That is, FIG. 15B illustrates an example in which the gating rates of the forward link and the reverse link are differently transmitted, and the gating rate of the reverse link is set to one.

Referring to FIG. 15B, when the forward dedicated control channel is activated in the control holding state, the power control rate of the forward link is 800 Hz, as the gating rate of the forward link is changed to 1, 1/2, 1/4, 1/8. 400Hz, 200Hz, 100Hz. In the case where the reverse dedicated control channel is not activated in the control holding state, when the gating rate of the forward link is 1/1, the PCB signals in the forward link are all power control groups (Nos. 8 to 15), that is, 1.25 msec units. Power transmission rate of the forward link is 800 Hz. When the gating rate of the forward link is 1/2, since the PCB signals are transmitted in power control groups 9, 11, 13, and 15, that is, in 2.5 msec units, the power control rate of the forward link is 400 Hz. When the gating rate of the forward link is 1/4, since the PCB signals are transmitted in power control groups 11 and 15, that is, 5.0 msec units in the forward link, the power control rate of the forward link is 200 Hz. When the gating rate of the forward link is 1/8, the power control rate of the forward link is 100 Hz since the PCB signal is transmitted only in the 15th power control group, that is, in units of 10.0 msec.

On the other hand, when the forward dedicated control channel is activated in the control holding state, it can be seen that the power control rate of the forward link becomes 800 Hz regardless of the gating rate of the forward link. In addition, it can be seen that the power control delay of the forward link and the reverse link is minimized regardless of the gating rate of the forward link.

FIG. 15C illustrates a second embodiment of forward and reverse link signal transmissions having different gating rates when the forward dedicated control channel is not activated or not in a control holding state. That is, FIG. 15C illustrates an embodiment in which the gating rates of the forward link and the reverse link are differently transmitted, and the gating rate of the reverse link is 1/2.

Referring to FIG. 15C, when the forward dedicated control channel is not activated, as the gating rate of the forward link is changed to 1, 1/2, 1/4, 1/8, the power control rate of the forward link is 800 Hz, 400 Hz, It becomes 200Hz, 100Hz. Specifically, when the gating rate of the forward link is 1/1 in FIG. 15C, the PCB signals in the forward link are four power control groups (Nos. 9, 11, and 13) in which signals are transmitted according to the gating rate of the reverse link. , Number 15). That is, since the PCB signal of the forward link is transmitted to each power control group having a length of 2.5 msec, the forward power control rate is 400 Hz. If the gating rate of the forward link is 1/2, the PCB signal on the forward link is transmitted in four power control groups (Nos. 9, 11, 13 and 15). That is, since the PCB signal is transmitted in 2.5msec unit in the forward link, the forward power control rate is 400Hz. When the gating rate of the forward link is 1/4, the PCB signal in the forward link is transmitted by the power control groups 11 and 15. That is, since the PCB signal is transmitted in 5.0 msec units in the forward link, the forward power control rate is 200 Hz. When the gating rate of the forward link is 1/8, the PCB signal in the forward link is transmitted only in the 15th power control group. That is, since the PCB signal is transmitted in 10.0 msec units in the forward link, the forward power control rate is 100 Hz.

On the other hand, when the forward dedicated control channel is activated in the control hold state, it can be seen that the power control rate of the forward link becomes 400 Hz regardless of the gating rate of the forward link.

On the other hand, when the cell radius is very large in the mobile communication system, the propagation delay is increased in the terminal near the cell edge, so that the power control delay of the forward / reverse link is also increased. In this case, the power control delay value of the forward / reverse link may vary according to the gating rate in the forward and reverse directions and the relative gating position in the control holding state. Therefore, the base station needs to change the gating position (pattern) of the forward or reverse link to estimate the propagation delay of the terminal so that the power control delay of both the forward and reverse links can be minimized. The method of changing the gating position may fix the gating position of the reverse link and change the gating position of the forward link, and conversely, may fix the gating position of the forward link and change the gating position of the reverse link.

16A and 16B illustrate that, when the forward dedicated control channel is not activated or not, the power control delay is changed according to the present invention when the reverse dedicated control channel is not activated or is regulated. That is, when controlling the transmission pattern as in the present invention, the power control delay can be reduced as compared with the case where the transmission pattern is not regulated. The interruption pattern of the reverse link and the forward link may be set for each user through a network. In this case, the interruption pattern may be set so that the power control delay is minimized or the power delay of the bidirectional link is balanced. 16A and 16B are exemplary embodiments, the numerical value of the power control delay may be changed flexibly according to the system implementation. In the following description, the solid line represents the forward link and the dotted line represents the reverse link.

16A shows that the power control delay changes according to the reverse transmission pattern when the forward dedicated control channel is not activated or not in the control holding state.

When the forward dedicated control channel is not activated when having the reverse transmission pattern as shown in FIG. Reference numeral 703 illustrates forward power control. In this case, the power control delay is 3 PCG. When the forward dedicated control channel is not activated, the reverse power control is performed at 715 when the pilot symbol of the reverse link 711 is measured to generate the PCB 701 and then descend to the forward link for reverse power control. In this case, the power control delay is 7 PCG. On the other hand, if the forward dedicated control channel is activated in FIG. Forward power control is made at number 707. In this case, the forward power control delay is 1 PCG.

When the forward dedicated control channel is not activated when having the reverse transmission pattern as shown in FIG. 16A-down, the PCB of the forward link of reference number 721 is measured to generate the PCB of the reference number 731 for forward power control. Ascending, forward power control is made at 723. In this case, the power control delay of the forward link is 3 PCG. When the forward link dedicated control channel is not activated, for the reverse power control, the pilot symbol of the reverse link of 733 is measured to generate a PCB of 725 and then descend to the forward link. . In this case, the power control delay is 3 PCG. On the other hand, when the forward dedicated control channel is activated in FIG. 16A-down, the PCB of the forward link of reference number 727 is measured to generate the PCB of the reverse link of reference number 737 for forward link power control. Forward power control is made at 729. In this case, the forward power control delay is 2 PCG.

FIG. 16B shows that the power control delay changes according to the forward transmission pattern when the reverse dedicated control channel is not activated or not in the control holding state.

Referring to FIG. 16B, when the reverse dedicated control channel is activated in FIG. 16B-up, the pilot symbol of the reverse link of 751 is measured to generate the PCB of the reverse link of 741 for backward link power control. Down the link, reverse power control is made at 753. In this case, the reverse power control delay is 3 PCG.

Referring to FIG. 16B, when the reverse dedicated control channel is activated in FIG. 16B-down, the pilot symbol of the reverse link of reference number 771 is measured to generate the PCB of the forward link of reference number 761 for the reverse link power control. Down the link, reverse power control is made at 773. In this case, the reverse power control delay is 2 PCG.

As shown in FIG. 16A-up and FIG. 16B-up, when the positions of the forward link and the reverse link slots are similar, the forward power control delay is 3 PCG when the forward and reverse dedicated control channels are not present. 7 PCG. If there is a forward dedicated control channel, the forward power control delay is 1 PCG, and if there is a reverse dedicated control channel, the reverse power control delay is 3 PCG. 16A-down and 16B-down, when there are no interruption patterns of the transmission signals of the forward link and the reverse link, when there are no forward and reverse dedicated control channels, the forward power control delay is 3 PCG, and the reverse power control delay is 3 PCG. The forward power control delay is 2 PCG when there is a forward dedicated control channel, and the reverse power control delay is 2 PCG when there is a reverse dedicated control channel. As shown in the above embodiment, staggering the interruption patterns of the transmission signals of the forward link and the reverse link can reduce the power control delay when the dedicated control channel is not activated, and the forward link and the reverse link when the dedicated control channel is activated. It is possible to balance the power control delay.

The forward and reverse power control operations performed according to the channel transmission operation in the control holding state of the CDMA communication system as described above are as follows.

First, the terminal intercepts the reverse channel according to a reverse gating rate (interruption pattern) different from the forward gating rate and transmits reverse pilot and forward power control information through the reverse channel.

Secondly, the base station intercepts the forward channel according to the forward gating rate different from the reverse gating rate and transmits the reverse power control information through the forward channel.

Third, in order to minimize the power control delay or to balance the power delay of the bidirectional link, the gating rates in the forward and reverse directions are differently set in the network.

Third, the terminal controls the reverse transmission power according to the reverse power control information received through the forward channel.

Fourth, the terminal measures the strength of the signal received through the forward channel to generate forward power control information at the reverse gating rate and transmits through the reverse channel.

Fifth, the base station controls the forward transmission power according to the forward power control information received through the reverse channel.

As described above, in the present invention, when there is no data to be transmitted for a predetermined time, the following effects can be obtained by controlling the dedicated control channel between both links by different gating rates.

First, there is an effect that it is possible to increase the service capacity by minimizing the time spent in the synchronization re-acquisition process at the base station and at the same time not only increases the interference between links but also reduces the mobile station usage time.

Second, by varying the gating rates of the two links, the power control rate can be increased and the power control delay can be reduced, thereby improving performance and increasing cell capacity.

Third, by changing the gating position to minimize or balance the power control delay between both links due to propagation delay, the performance of both desired links can be improved.

Claims (35)

In a code division multiple access communication system having different gating rates for up-link and down-link, A mobile station having an intermittent transmission controller for controlling the intermittent transmission of a reverse dedicated control channel signal by an uplink gating rate in a gating mode if no data is transmitted for a predetermined time; And a base station having an intermittent transmission controller for controlling intermittent transmission of a forward dedicated control channel signal by the uplink gating rate and a different downlink gating rate in the gating mode. Intermittent channel transmitter. The codec according to claim 1, wherein the intermittent transmission controller of the mobile station fixes the downlink gating rate in the gating mode and changes the uplink gating rate to interrupt the reverse dedicated control channel signal. Intermittent channel transmitter for split multiple access communication system. The code division according to claim 1, wherein the intermittent transmission controller of the mobile station fixes the uplink gating rate and changes the downlink gating rate in the gating mode to interrupt the reverse transmission control channel signal. Intermittent channel transmitter in multiple access communication system. 4. The intermittent transmission controller of claim 2, wherein the intermittent transmission controller of the base station fixes the forward dedicated control channel signal by fixing the gating rate of the downlink and changing the gating rate of the uplink in the gating mode. An intermittent channel transmitter of a code division multiple access communication system, characterized in that. The intermittent transmission controller of the base station fixes the forward dedicated control channel signal by fixing the gating rate of the uplink and changing the gating rate of the downlink in the gating mode. An intermittent channel transmitter of a code division multiple access communication system, characterized in that. In a code division multiple access communication system having different gating rates for up-link and down-link, Intermittently transmitting a reverse dedicated control channel signal according to an uplink gating rate if there is no data to be transmitted for a predetermined time; Intermittent transmission of a forward dedicated control channel signal according to the uplink gating rate and a different downlink gating rate if there is no data to be transmitted for the predetermined time. . 7. The method of claim 6, wherein the reverse dedicated control channel signal fixes the downlink gating rate and modulates the uplink gating rate. 7. The method of claim 6, wherein the reverse dedicated control channel signal fixes the uplink gating rate and modulates the downlink gating rate. 8. The method of claim 7, wherein the downlink gating rate is one. 8. The method of claim 7, wherein the downlink gating rate is 1/2. 10. The method of claim 8, wherein the uplink gating rate is one. 10. The method of claim 8, wherein the uplink gating rate is 1/2. 9. The intermittent channel transmission of a code division multiple access communication system according to claim 7 or 8, wherein the forward dedicated control channel signal fixes the downlink gating rate and changes the uplink gating rate. Way. 9. The intermittent channel transmission of a code division multiple access communication system according to claim 7 or 8, wherein the forward dedicated control channel signal fixes the uplink gating rate and changes the downlink gating rate. Way. 15. The method of claim 13, wherein the downlink gating rate is one. 15. The method of claim 13, wherein the downlink gating rate is 1/2. 15. The method of claim 14, wherein the uplink gating rate is one. 15. The method of claim 14, wherein the uplink gating rate is 1/2. A terminal for intermittently transmitting and transmitting a reverse pilot signal at a reverse gating rate different from the forward gating rate in a control holding state; And a base station for intermittently transmitting and transmitting a reverse power control signal according to the forward gating rate in the control holding state. 20. The apparatus of claim 19, wherein the control holding state is a state in which a reverse dedicated data channel is not activated. 21. The apparatus of claim 20, wherein the reverse pilot signal is a signal including a reverse pilot and forward power control information. 20. The apparatus of claim 19, wherein the reverse gating rate and the forward gating rate are set through a network. Continuously transmitting a reverse pilot signal when the reverse dedicated data channel is activated; And a step of intermittently transmitting the reverse pilot signal by a reverse gating rate different from a forward gating rate when there is no data transmitted through the reverse dedicated data channel for a predetermined time. Intermittent channel transmission method. 24. The method of claim 23, wherein the reverse pilot signal is a signal including a reverse pilot and forward power control information. 24. The method of claim 23, wherein the reverse gating rate is set through a network. Continuously transmitting reverse power control bits in each power control group when the forward dedicated data channel is activated; And performing the intermittent transmission of the reverse link power control bits at a forward gating rate different from the reverse gating rate when there is no data transmitted through the reverse dedicated data channel for a predetermined time. Intermittent channel transmission method of system. A channel transmission method in a control holding state of a code division multiple access communication system, After the terminal controls the reverse transmission power by the reverse power control information received through the forward channel, and controls the reverse power and the forward power control information corresponding to the strength of the signal received through the forward channel by the reverse gating pattern Transmitting in a reverse channel by the reverse transmission power; The base station controls forward transmission power based on the forward power control information received through the reverse channel, and forward power control information corresponding to the strength of the signal received through the reverse channel is different from the reverse gating pattern. And intermittently transmitting by the pattern to the forward channel by the forward transmission power. 28. The method of claim 27, wherein the reverse control pattern and the forward control pattern are set through a network. 29. The method according to claim 28, wherein the reverse control pattern and the forward control pattern are set differently for each user so that the power control delay is minimized or the power control delay is balanced in the forward and reverse directions. Channel transmission method. delete delete delete delete delete delete