TWI454080B - Apparatus, system, and method for managing transmission power in a wireless communication system - Google Patents

Description

Device system and method for managing transmission power in a wireless communication system

The present invention relates generally to communication systems and, more particularly, to an apparatus, system, and method for managing transmission power in a wireless communication system.

Wireless communication systems typically employ power control procedures to maximize the overall performance of the communication system. Power control procedures are particularly advantageous in systems that utilize coded multi-directional proximity (CDMA) technology because the signals transmitted by user equipment other than the target transmission source behave as noise from the receiver. Therefore, system performance can be improved if the transmission power of the user equipment is properly managed. In conventional wireless communication systems such as cellular and global mobile telecommunications service (UMTS) systems, the base station (Node B) periodically transmits power control information to the mobile station (user equipment) to indicate that the mobile station should increase Or reduce the transmission power. Generally, in a UMTS system, a base station is referred to as a Node B, and a mobile station is referred to as a User Equipment (UE). In addition to the power control commands, the actual transmit power of the UE device depends on the number of channels transmitted, the amount of data transmitted, and the maximum transmit power of the UE device.

A limitation of the conventional system is that, unless a power control command indicating that power should be changed is received, the transmission power level determined for a particular set of conditions is not adjusted when the condition changes. Since power control information is only periodically received, there may be situations where the UE device transmits data at a power level less than the optimal power level before receiving new power control information. In conventional systems, for example, if the UE device is subjected to the maximum power pole With a limited limit and transmitted at a power lower than the authorized power of Node B, the UE device scales the transmission power level of the channel to maintain the relative power between the channels not exceeding the maximum power limit. When the data rate or number of channels decreases, the transmission power level remains below the authorized level until new power control information is received. Therefore, the transmit power level of the UE device in the conventional system remains below the optimal level after the power limited transmission and before the new power control command is received.

Accordingly, what is needed is an apparatus, system, and method for managing transmission power in a wireless communication system.

An embodiment is a User Equipment (UE) device that maintains an authorized power level based on the received power control command and based on the authorization after the power limited transmission and before receiving a new power control command The power level determines the transmission power level of a signal to manage the transmission power. After the power limited transmission with the maximum power level being less than the authorized power level, the UE device determines the transmission power level of the next transmission based on the authorized power level.

Another embodiment is a program product for managing transmission power in a user equipment device (distributed computer system), the program product comprising computer executable instructions embodied on a computer readable medium and configured Performing the following computer execution steps: maintaining an authorized power level based on the received power control command; determining a transmission power of a signal based on the authorized power level after the power limited transmission and before receiving a new power control command Level.

Yet another embodiment is a configuration configured for communication in a wireless communication system Device device, the user device device comprising: a holding component for maintaining an authorized power level based on the received power control command; a determining component for receiving after power limited transmission Before a new power control command, the transmission power level of a signal is determined based on the authorized power level.

An apparatus, system, and method for efficiently managing transmission power in a user equipment (UE) device by maintaining and applying an authorized power level after a power limited transmission and upon receiving a new power control Achieved by determining the transmission power level before the command. The UE device maintains the authorized power level by monitoring and adjusting the authorized power level based on the received power control commands, transmission data rate, and channel configuration changes. After the power limited transmission with the maximum power level being less than the authorized power level, the UE device determines the transmission power level of the next transmission based on the authorized power level. Therefore, after the power limiting condition is stopped, the UE device transmits at the optimal power level before receiving the next power control command to eliminate the inefficiency caused by power transmission below the authorized power.

1 is a block diagram of a User Equipment (UE) device 100 in communication with a Node B 102 of a wireless communication system in accordance with an exemplary embodiment of the present invention. The functional blocks shown in Figure 1 can be implemented by any combination of hardware, software, and/or firmware. Any of the functions performed by a single block may be performed by multiple devices or systems, and in some cases, the functionality of more than one block may be performed by a single device. For example, in some cases, controller 108 may perform the functions of a receiver and a transmitter.

In an exemplary embodiment, UE device 100 communicates with one or more Node Bs 102 in accordance with the UMTS standard. The transmission power management techniques discussed herein can be used in any of a large number of communication systems. The UE device 100 can be a mobile station, a mobile unit, a cellular telephone, a wireless PDA, or any other portable communication device. In addition, those skilled in the art should recognize that Node B is a base station in a UMTS system, and the function of Node B can be applied to any type of base station or BTS utilizing power control in a communication system.

The controller 108 in the UE device 100 controls the transmitter 104 and the receiver 106 and performs other functions including managing the overall functionality of the UE device 100. Controller 108 is any combination of processor, microprocessor, processor configuration, computer, logic gate, special application integrated circuit (ASIC), programmable logic circuit, and/or computing circuit. The software running on controller 108 performs the functions described herein as well as computational and other device management and communication tasks.

Receiver 106 receives the power control signal from Node B 102 during operation. In an exemplary embodiment, the power control signal is a Transmission Power Control (TPC) signal indicating whether the UE device 100 should increase or decrease the transmission power relative to the last UE transmission. It is known that the power control information in the UMTS system indicates the authorized transmission power level (PAU), which indicates the total authorized transmission power of the signal when applied to the transmission data rate of the signal. The UE device 100 determines an appropriate transmission power level based on the total amount of data to be transmitted. As the data rate increases, the total transmission power also increases. Thus, if the transmission channel is increased, then when all other factors remain constant, the UE device 100 is authorized to transmit at a higher power level than when there is no additional channel. Sometimes the power level will be authorized The quasi (PAU) is called the required power.

However, in addition to the power control commands, the actual transmit power (PTRANS) of the signals transmitted from the UE device 100 also meets other constraints. The transmit power level of the signal must be greater than or equal to the minimum power level (PMIN) and less than or equal to the maximum power level (PMAX) (eg, PMIN) PTRANS PMAX). The maximum power is typically the lesser of the power level specified by the class parameter of the UE device 100 and the power cap established and transmitted by the network. The network establishes a power cap by optimizing the communication capacity of each UE device service by a particular unit. The minimum power is typically determined by a particular communication standard, but the minimum power can vary between UE devices 100. An example of a minimum power level required for a communication standard is -50 dBm. As discussed above, when the power control command indicates that the UE device 100 is transmitting beyond these limits, there may be ambiguities and inefficiencies in the conventional system. Specifically, if the power control indicates that the UE device 100 should transmit at an authorized power level greater than the maximum power level, the UE device 100 limits the transmission power of some transmission data rates or adjusts the transmission power level of the channel to comply with Maximum power limit. When the power limited condition is stopped, such as when the transmission data rate of the next UE transmission is reduced or the additional channel is no longer used, the conventional UE device determines the power level based on the scaled power, and is smaller than the Node B 102 Power level transfer of authorized power. Conventional UE devices continue to transmit at a power level below the optimal transmission power level until Node B 102 uses the power control commands to adjust the transmission power.

According to an exemplary embodiment, the UE device 100 maintains the authorized power level by monitoring and adjusting the authorized power level in accordance with the power control commands. Transmitting power When the rate is limited by the maximum power, the UE device 100 applies an authorized power level to determine the transmission power of the next transmission. Thus, the UE device 100 tracks the authorized power level and does not continue to limit the transmission power according to the power limited transmission as in the conventional system. The transmission power of the unconstrained signal transmitted after the power limited condition is stopped is not dependent on the previous power limited transmission of the power limited signal.

A value indicative of the authorized power level is stored in memory 110, which may include any combination of volatile or non-volatile memory devices. For example, the memory can include a random access memory (RAM) device. The software running on the controller 108 applies the criteria to maintain the authorized transmission power level stored as a value in the memory 110 of the exemplary embodiment.

Accordingly, controller 108 is configured to maintain an associated power level associated with the transmission data rate and based on the power control commands. The controller 108 is further configured to determine the transmit power level of the signal based on the authorized power level after the power limited state is stopped and before the new power control command is received. The receiver 106 is configured to receive a power control command, and the transmitter 104 is configured to transmit a power limited signal and then transmit the unconstrained signal at an authorized power level after the power limited condition is stopped.

The method and apparatus of the present invention can be at least partially employed in the form of program logic or code (i.e., instructions) embodied in a tangible medium, such as a floppy disk, CD-ROM, hard disk. Machine, random access or read-only memory or any other machine-readable storage medium. When the code is loaded into and executed by a machine, such as a computer or processor within the UE device 100, the machine becomes a device for practicing the present invention. This hair The method and apparatus may also be embodied in the form of a code transmitted over an optical fiber, a radio frequency link, or by any other form of transmission on some transmission medium such as a wire or cable. When a code is received and loaded into and executed by a machine, such as a computer, processor or controller 108 within UE device 100, the machine becomes a device for practicing the present invention. When implemented on a general purpose processor, the code is combined with the processor to provide a unique means of operation similar to the particular logic circuit.

2 is a flow chart of a method of transmitting power management in a UE device 100 in accordance with an exemplary embodiment of the present invention. The method can be performed by any combination of hardware, firmware and/or software. In an exemplary embodiment, the method is performed by running a software code on controller 108 using memory 110, transmitter 104, receiver 106, and other devices in UE device 100. In some cases, the order of the steps described with reference to Figures 2 and 3 may vary.

At step 202, the UE device 100 maintains an authorized power level. The controller 108 interprets the power control commands transmitted by the Node B 102 and received by the receiver 106 to adjust the authorized power level. In an exemplary embodiment, the receiver 106 receives a TPC command according to the UMTS standard indicating whether the authorized power should be increased or decreased. A value indicating the authorized power level is stored in the memory and updated as needed. Thus, the UE device 100 monitors and adjusts the authorized power level based on the power control commands. An exemplary method of performing step 202 will be discussed in further detail below with reference to FIG.

At step 204, the transmit power level of the signal is determined based on the authorized power level. In addition to the criteria to be discussed immediately below and the selected data rate of the signal to be transmitted, in some cases other rules and criteria may be used to determine The authorized power level of the signal. Step 204 includes steps 208 through 214.

At step 206, a signal is transmitted from the UE device 100 at a transmission power (PTX). In an exemplary embodiment, the transmission power (PTX) is determined based on the transmission data rate and the number of channels based on the transmission mechanism and the criteria used in steps 208-214. Thus, in an exemplary embodiment, the power management method applies an authorized power level to transmit an unconstrained signal after transmitting a power limited signal and before receiving a new power control command. After transmitting the signal, the program returns to step 202.

Steps 208 through 216 provide an exemplary method of performing step 204. At step 208, it is determined whether the authorized power level is less than or equal to the minimum power level (PMIN) of the UE device 100. If the authorized power is less than or equal to the minimum power level (PMIN), the transmit power (PTX) is set equal to the minimum power at step 210, and then the process proceeds to step 206. Otherwise, the process proceeds to step 212.

At step 212, it is determined if the maximum power is less than or equal to the authorized power level (PAU). If the maximum power is less than or equal to the authorized power level, the transmit power level is set equal to the maximum power level in step 214, and then the process proceeds to step 206. Otherwise, the transmit power is set equal to the authorized power at step 216, and then the process proceeds to step 206.

3 is a flow diagram of maintaining an authorized power level in accordance with an exemplary embodiment of the present invention. Steps 302 through 320 provide an exemplary method for performing step 202 of FIG. The method can be performed by any combination of hardware, firmware and/or software. In an exemplary embodiment, the method utilizes memory 110, transmitter 104, receiver 106, and other devices in UE device 100. The software code is run on the controller 108 for execution.

At step 302, it is determined if the maximum power level is less than the authorized power level. If the maximum power level is not less than the authorized power level, then the program proceeds to step 304 where the program returns to step 204. Otherwise, the program proceeds to step 306.

At step 306, a determination is made as to whether a data rate change or channel change has occurred since the last transmission. In an exemplary embodiment, the data rate change is indicated by a change in Transport Format Combination Indicator (TFCI) transmitted in an uplink transmission in accordance with the UMTS standard. The change in physical channel combination is detected by time aligning different uplink physical channels, such as DPDCH and HSDPCCH, and determining when any of them are turned on, off, or a change in expected transmission power occurs. If no change occurs, the program proceeds to step 310. Otherwise, the process proceeds to step 308.

At step 308, the previous authorized power level (PAU[N-1]) is adjusted based on the channel change or data change to generate the current authorized power level (PAU[N]). When a data rate change occurs in an exemplary embodiment, the current authorized power is the previous authorized power plus Δ power (dB), where Δ power is transmitted by TFCI [N-1] and TFCI [N] Under the same power constraints on the DPCCH, the DPDCH and DPCCH power scaling factors of the new TFCI [N] are compared with the DPDCH and DPCCH power scaling factors of the previous TFCI [N-1].

At step 310, it is determined whether new power control information has been received since the last transmission. If no new power control information is received, the program returns to step 204. Otherwise, the program proceeds to step 312.

At step 312, it is determined whether the previous authorized power level is between the maximum and minimum limits (PMIN PAU[N-1] PMAX). In the exemplary embodiment, the maximum and minimum power limits are known in advance, depending on the UE class and network signal value. These parameters are configured in the UE during an initial signal exchange operation between the UE and the Node B. If the previous authorized power level is between the power limits, the process proceeds to step 314. Otherwise, the program proceeds to step 316.

At step 314, a new power control command is applied to adjust the authorized power level and generate the current authorized power level, and then proceeds to step 204.

At step 316, it is determined if the previous authorized power level is greater than the maximum authorized power and the TPC command is equal to "UP". If the condition is met, the current authorized power level is set equal to the previous authorized power level, and the process proceeds to step 304. Otherwise, the program proceeds to step 320.

At step 320, it is determined if the previous authorized power level is less than the minimum authorized power and the TPC command is equal to "DOWN". If the condition is met, the current authorized power level is set equal to the previous authorized power level, and the process proceeds to step 204. Otherwise, the program proceeds to step 204.

When the exemplary steps described with reference to FIGS. 2 and 3 are continuously performed in the exemplary embodiment, the case of unconstrained signals after power limited transmission is managed by transmitting unconstrained signals at authorized power levels.

4 is a graphical illustration of a comparison between transmission power levels of a prior art system and an exemplary UE device in accordance with the first example. The illustration includes the authorized transmission power 404 of the three frames 401, 402, 403 in the first transmission instance, A representation of the transmit power 406 and the UE device transmit power 408 is known. This scheme is feasible when there are speech encoded data (AMR-adaptive multi-rate) transmitted in frames 1, 2 and 3 (401, 402, 403). If there is only one additional signal message transmitted on the DPDCH in the frame 2 as shown in FIG. 4, the frame 3 shows how the system quickly returns to the frame 1 using the adaptive authorization power implementation according to the exemplary embodiment. Steady state power level. Therefore, the increase in the error rate of voice traffic caused by the limited transmission power will be limited to frame 2. In the non-adaptive licensed power embodiment, the error rate will increase over a much longer period of time, including frame 2, frame 3, and until the power control command forces the power to rise. This is not particularly desirable because of the high symbol detection error implicit in the communication power control commands.

Each transmit power representation 404, 406, 408 includes a DPCCH portion 410 and a DPDCH portion 412. The maximum power 414 of the UE device is represented by a horizontal line having a power value of 15, and the minimum power level 416 is depicted as a horizontal line at 1. In the first frame 401, the authorized power level 404, the conventional transmission power level 406, and the UE transmission power level 408 are all similar to the maximum power level 414. For the first example, TFCI #0 (BetaC = BetaD = 15) to provide a total transmission power 404, 406, 408 of PMAX - 0.3 dB in the first frame 401. In the second frame 402, the authorized power is greater than the maximum power. In the second frame 402, TFCI #1 (BetaC=7, BetaD=15). Therefore, the data rate in the second frame 402 is greater than the data rate in the first frame 401, thereby generating an authorized power that is 4.46 dB higher than the authorized power in the first frame 401. Both the conventional transmission power 406 and the UE device transmission power 408 are limited to the maximum power 414, and both the DPCCH portion 410 and the DPDCH portion 412 are reduced by the symbol. The power limit is 414. In the third frame 403 in the first example, the UE device transmits again under TFCI #0. The conventional power 406 in the third frame 403 is lower than the maximum power 414, even though the authorized power 404 allows transmission at a higher level. The power control in the conventional system is strongly adjusted in the second frame 402, and no correction is made in the third frame 403. Therefore, the conventional transmission power 406 in the third frame 403 is based on the transmission 406 in the previous frame 402 instead of the authorized power 404. However, the transmit power level 408 of the exemplary UE device is returned to the authorized power level 404.

5 is a graphical illustration of a comparison between transmission power levels 508, 510 of a conventional example system and an exemplary UE device in accordance with a second example. The illustration includes representations of the authorized transmission power 506, the conventional transmission power 508, and the UE device transmission power 510 of the five time slots 501, 502, 503, 504, 505 of the second transmission example.

In the first time slot 501 and the second time slot 502, the transmission signal includes only the DPDCH portion 412 and the DPCCH portion 410. In the third time slot 503 and the fourth time slot 504, the addition of the HSDPCCH channel produces an HSDPCCH portion 512 and an authorized power level 506 that is greater than the maximum power level 414 of the UE device. The power of each of the portions 410, 412, 512 is reduced to maintain the transmission power level less than the maximum power level 414. In the fifth time slot 505, the HSDPCCH channel is not used and the authorized power level 506 returns to a value less than the maximum power level 414. The conventional transmission power 508 is less than the authorized power level 506 because no adjustments are made after the channel powers 410, 412, 512 in the third time slot 503 and the fourth time slot 504 are scaled. However, the UE device operating in accordance with an exemplary embodiment is authorized in the fifth time slot 505 Rate 510 transmits signals.

6 is a block diagram of a system for managing power control in accordance with an exemplary embodiment of the present invention. The blocks shown in Figure 6 represent functions that can be implemented in any combination of software, hardware, and/or firmware. Any of the functions performed by a single block may be performed by multiple devices or systems, and in some cases, the functionality of more than one block may be performed by a single device. An example of a suitable implementation of a functional block includes executing a software code on controller 108.

The authorized power keeper 602 maintains an authorized power level. The controller 108 interprets the power control commands transmitted by the Node B 102 and received by the receiver 106 to adjust the authorized power level. In an exemplary embodiment, the receiver 106 receives a TPC command according to the UMTS standard indicating whether the authorized power should be increased or decreased. A value indicating the authorized power level is stored in the memory and updated as needed. Thus, the authorized power keeper 602 monitors and adjusts the authorized power level based on the power control commands. An exemplary method of performing step 202 will be discussed in greater detail below with respect to FIG.

Transmission power level determiner 604 determines the transmission power level of the signal based on the authorized power level. The transmit power level determiner 604 includes a minimum power analyzer 606, a maximum power analyzer 610, and three power setters 608, 612, 614.

Transmitter 104 transmits the signal from UE device 100 at a transmission power (PTX). In an exemplary embodiment, transmission power (PTX) is determined based on a transmission mechanism and criteria used by blocks 606-614 based on the transmission data rate and the number of channels. Thus, in an exemplary embodiment, the power management method applies an authorized power level to transmit after a power limited signal is transmitted An unrestricted signal is transmitted before a new power control command is received. After transmitting the signal, the keeper 602 continues to maintain the authorized power level.

The minimum power analyzer 606 analyzes the minimum power (PMIN) to determine if the authorized power level is less than or equal to the minimum power level (PMIN) of the UE device 100. If the authorized power is less than or equal to the minimum power level (PMIN), the transmit power (PTX) is set equal to the minimum power by the power setter 608. Otherwise, the maximum power analyzer 610 determines if the maximum power is less than or equal to the authorized power level (PAU). If the maximum power is less than or equal to the authorized power level, the power level is set by the power setter 612 to be equal to the maximum power level. Otherwise, the transmission power is set equal to the authorized power by the power setter 614.

7 is a block diagram of an exemplary functional implementation of one of the authorized power keeper 602. The blocks shown in Figure 7 represent functions that can be implemented in any combination of software, hardware, and/or firmware. Any of the functions performed by a single block may be performed by multiple devices or systems, and in some cases, the functionality of more than one block may be performed by a single device. An example of a suitable implementation of a functional block includes executing a software code on controller 108.

Maximum power analyzer 702 determines if the maximum power level is less than the authorized power level. If the maximum power level is not less than the authorized power level, the power level determiner 604 determines the transmission power level. Otherwise, data rate analyzer 704 determines if a data rate change or channel change has occurred since the last transmission. If a change occurs, the power setter 706 sets the current authorized power level based on the previous authorized power level (PAU[N-1]) and the power level change associated with the rate change or data change (PAU[N ]).

The power control analyzer determines if new power control information has been received since the last transmission. If no new power control information is received, the transmit power level determiner 604 determines the transmit power level.

If no new power control command is received, the authorized power analyzer 710 determines whether the previous authorized power level is between the maximum and minimum limits (PMIN PAU[N-1] PMAX). If the previous authorized power level is between the power limits, the power setter 712 sets the authorized power level based on the power control command.

If the previous power level is greater than the maximum power level, the TPC analyzer 714 determines if the power control command is equal to "UP." If the previous authorized power level is less than the minimum authorized power, the TPC analyzer 718 determines if the TPC is equal to "DOWN."

If the previous power level is greater than the maximum power level and the TPC is equal to "UP", or if the previous authorized power level is less than the minimum authorized power and the TPC command is equal to "DOWN", the power setter 716 will present the current authorized power level. Set to the previous authorized power level.

Thus, in the exemplary embodiment, UE device 100 maintains the authorized power level by monitoring and adjusting the authorized power level based on the TPC commands received by receiver 106. After the power limited state of transmitting a signal at a power less than the authorized power, if the authorized power is less than or equal to the maximum power, the UE device 100 transmits the next signal with the authorized power.

Other embodiments and modifications of the present invention will be readily apparent to those skilled in the art. The above description is illustrative and not restrictive. The invention is limited only by the scope of the following patent application, when combined with the above description The following claims are intended to cover all such embodiments and modifications. Therefore, the scope of the present invention should be determined by reference to the above description, and should be judged by reference to the scope of the accompanying claims and the equivalents thereof.

100‧‧‧UE device/user device device

102‧‧‧Node B

104‧‧‧Transporter

106‧‧‧ Receiver

108‧‧‧ Controller

110‧‧‧ memory

401‧‧‧ first frame

402‧‧‧Second frame

403‧‧‧ Third frame

404‧‧‧Authorized power level/authorized transmission power

406‧‧‧Preferred transmission power / conventional transmission power level

408‧‧‧UE device transmission power / UE transmission power level

410‧‧‧DPCCH section

412‧‧‧DPDCH section

414‧‧‧Maximum power level

416‧‧‧Minimum power level

501‧‧‧ first time slot

502‧‧‧ second time slot

503‧‧‧ third time slot

504‧‧‧ fourth time slot

505‧‧‧ fifth time slot

506‧‧‧Authorized power level/authorized transmission power

508‧‧ ‧known transmission power

510‧‧‧UE device transmission power

512‧‧‧HSDPCCH section

602‧‧‧Authorized power holder

604‧‧‧Transmission power level determiner

606‧‧‧Minimum Power Analyzer

608‧‧‧Power setter

610‧‧‧Max Power Analyzer

612‧‧‧Power Setter

614‧‧‧Power setter

702‧‧‧Max Power Analyzer

704‧‧‧Data Rate Analyzer

706‧‧‧Power Setter

708‧‧‧Power Control Analyzer

710‧‧‧ Authorized Power Analyzer

712‧‧‧Power Setter

714‧‧‧TPC Analyzer

716‧‧‧Power setter

718‧‧‧TPC Analyzer

1 is a block diagram of a User Equipment (UE) device in accordance with an exemplary embodiment of the present invention.

2 is a flow chart of a method for managing transmission power in a UE device, in accordance with an exemplary embodiment of the present invention.

3 is a flow diagram of maintaining an authorized power level in accordance with an exemplary embodiment of the present invention.

4 is a diagram illustrating a comparison between transmission power levels of a prior art system and an exemplary UE device in accordance with the first example.

5 is a diagram illustrating a comparison between transmission power levels of a conventional UE device according to a second example.

6 is a block diagram of a system for managing power control in accordance with an exemplary embodiment of the present invention.

7 is a block diagram of an exemplary functional implementation of an authorized power keeper.

104‧‧‧Transporter

602‧‧‧Authorized power holder

604‧‧‧Transmission power level determiner

606‧‧‧Minimum Power Analyzer

608‧‧‧Power setter

610‧‧‧Max Power Analyzer

612‧‧‧Power Setter

614‧‧‧Power setter

Claims (36)

A method of managing transmission power in a user equipment device, the method comprising: maintaining a power control adjustment state for an uplink transmission based on the received Transmission Power Control (TPC) command; and in the uplink Determining one of the signals based on the power control adjustment state after one of the uplink power limited transmissions after one of the power control adjustment states is less than the power control adjustment state, and before receiving a new TPC command The power level has not been transmitted in one of the subsequent non-power limited uplink transmissions. The method of claim 1, wherein the uplink power limited transmission comprises: a signal transmission at a maximum power level of one of the user equipment devices, the maximum power level being less than a previous power control level. The method of claim 2, further comprising: transmitting a power limited signal at a maximum power level when a maximum power level is less than the power control adjustment state; and when the power control adjustment state is less than the maximum power level And transmitting an unconstrained signal in the power control adjustment state before receiving the new TPC command. The method of claim 3, wherein transmitting the power limited signal comprises: setting a channel transmission power level of the plurality of channels to reduce a total transmission power from a total authorized power of the plurality of channels to the maximum power level. The method of claim 3, wherein transmitting the power limited signal comprises setting a total transmission power level to reduce a total authorized transmission power of a first data rate to the maximum power level. The method of claim 3, wherein the power control adjustment state is based on a first data rate of the power limited signal, and the unconstrained signal has a second data rate that is less than the first data rate. The method of claim 1, wherein the maintaining comprises: adjusting the power control adjustment state based on one of a change in a transmission data rate. The method of claim 1, wherein the maintaining comprises: if the power control adjustment state is less than a maximum power level, adjusting the power control adjustment state based on a TPC command. The method of claim 8, wherein the maximum power level is determined by selecting a minimum value of the user equipment category and a network signal value. A user equipment device configured to communicate in a wireless communication system, the user equipment device comprising: a receiver configured to receive a transmission power control TPC command; a controller configured To maintain a state associated with a transmission data rate for an uplink transmission and based on one of the TPC commands, the controller is further configured to control less than the power after the uplink transmission Adjusting one of the power levels after one of the uplink power limited transmissions and before receiving a new TPC command, determining, based on the power control adjustment state, that one of the signals is not yet in the subsequent non-power limited uplink One of the link transmissions transmits the power level. The user equipment device of claim 10, wherein the uplink power limited transmission comprises: a signal transmission at a maximum power level of one of the user equipment devices, the maximum power level being less than a previous power control Adjustment of status. The user equipment device of claim 11, further comprising: a transmitter configured to transmit a power limited signal at the maximum power level when the maximum power level is less than the power control adjustment state, and Configuring to transmit an unconstrained signal in the power control adjustment state when the power control adjustment state is less than the maximum power level and before receiving the new TPC command. The user equipment device of claim 12, wherein the transmitter is further configured to reduce a total transmission power from one of the plurality of channels to the total authorized power by setting a channel transmission power level of the plurality of channels The maximum power level is used to transmit the power limited signal. The user equipment device of claim 12, wherein the transmitter is further configured to transmit by decreasing a total transmission power level to reduce a total authorized transmission power of a first data rate to the maximum power level. The power limited signal. The user equipment device of claim 12, wherein the power control adjustment state is based on a first data rate of the power limited signal, and the unconstrained signal has a second data rate that is less than the first data rate. The user equipment device of claim 10, wherein the controller is further configured to adjust the power control by changing based on one of transmission data rates The state is adjusted to maintain the power control adjustment state. The user equipment device of claim 10, wherein the controller is further configured to maintain the power control adjustment by adjusting the power control adjustment state based on a TPC command when the power control adjustment state is less than a maximum power level status. The user equipment device of claim 17, wherein the maximum power level is determined by selecting a minimum value of the user equipment category and a network signal value. A wireless communication system comprising: a Node B transmitting a Transmission Power Control (TPC) command; and a User Equipment (UE) device receiving the TPC commands and maintaining a power control adjustment state based on the TPC commands The UE device includes: a receiver configured to receive the TPC commands; and a controller configured to maintain a transmission data rate for an uplink transmission based on the The power control adjustment state of the TPC command, the controller being further configured to perform one of the uplink powers by the UE device after the uplink transmission is less than one of the power control adjustment states After the transmission is limited and before a new TPC command is received, one of the transmission power levels for one of the signals that is not yet in the subsequent non-power limited uplink transmission is determined based on the power control adjustment state. The wireless communication system of claim 19, the UE device further comprising: a transmitter configured to be less than the power at a maximum power level Transmitting a power limited signal at the maximum power level when the adjustment state is controlled, and transmitting the power control adjustment state to a non-received state when the power control adjustment state is less than a maximum power level and before receiving the new TPC command Limited signal. A computer program product comprising a computer readable medium, the computer readable medium comprising computer executable instructions encoded thereon for performing a method of managing transmission power in a user device device, the computer The execution instructions are configured to perform the following computer-implemented steps: maintaining a power control adjustment state for an uplink transmission based on the received Transmission Power Control (TPC) command; less than the uplink transmission after the uplink transmission One of the power control adjustment states is performed after one of the uplink power limited transmissions and before receiving a new TPC command, determining, based on the power control adjustment state, that one of the signals is not yet in the subsequent non-power reception One of the transmission power levels of the uplink transmission. The computer program product of claim 21, wherein the uplink power limited transmission comprises: a signal transmission at a maximum power level of one of the user equipment devices, the maximum power level being less than a previous power control adjustment status. In the computer program product of claim 22, the computer executable instructions are further configured to perform the step of transmitting a power limited signal at the maximum power level when a maximum power level is less than the power control adjustment state ;and When the power control adjustment state is less than the maximum power level and before receiving the new TPC command, an unconstrained signal is transmitted in the power control adjustment state. The computer program product of claim 23, wherein transmitting the power limited signal comprises: setting a channel transmission power level of the plurality of channels to reduce a total transmission power from the total authorized power of the plurality of channels to the maximum power level quasi. The computer program product of claim 23, wherein transmitting the power limited signals comprises: setting a total transmission power level to reduce a total authorized transmission power of a first data rate to the maximum power level. The computer program product of claim 23, wherein the power control adjustment state is based on a first data rate of the power limited signal, and the unconstrained signal has a second data rate that is less than the first data rate. The computer program product of claim 21, wherein the maintaining comprises: adjusting the power control adjustment state based on a change in a transmission data rate. The computer program product of claim 21, wherein the maintaining comprises: adjusting the power control adjustment state based on a TPC command when the power control adjustment state is less than a maximum power level. A user equipment device configured to communicate in a wireless communication system, the user equipment device comprising: a holding member for controlling based on received transmission power a (TPC) command to maintain a power control adjustment state for an uplink transmission; a determining component for performing one of power levels less than the power control adjustment state after the uplink transmission After the uplink power limited transmission and before receiving a new TPC command, determining a transmission power level for one of the signals that is not yet in the subsequent non-power limited uplink transmission based on the power control adjustment state . The user equipment device of claim 29, wherein the uplink power limited transmission comprises: a signal transmission at a maximum power level of one of the user equipment devices, the maximum power level being less than a previous power control Adjustment of status. The user equipment device of claim 30, further comprising: a transmission component configured to transmit a power limited signal at the maximum power level when the maximum power level is less than the power control adjustment state; and the transmitting The component is configured to transmit an unconstrained signal in the power control adjustment state when the power control adjustment state is less than the maximum power level and before receiving the new TPC command. The user equipment device of claim 31, wherein the transmission component comprises: a setting component configured to set a channel transmission power level of the plurality of channels to reduce a total transmission power from a total authorized power of the plurality of channels Up to the maximum power level. The user equipment device of claim 31, the setting member is configured to set a The total transmission power level is to reduce the total authorized transmission power of one of the first data rates to the maximum power level. The user equipment device of claim 31, wherein the power control adjustment state is based on a first data rate of the power limited signal, and the unrestricted signal has a second data rate that is less than the first data rate. The user equipment device of claim 29, wherein the holding member comprises: an adjustment member for adjusting the power control adjustment state based on one of a transmission data rate change. The user equipment device of claim 29, wherein the holding member comprises: an adjusting member configured to adjust the power control adjustment state based on a TPC command when the power control adjustment state is less than a maximum power level.