WO2011100912A2

WO2011100912A2 - Method, apparatus and radio network controller for outer loop power control processing

Info

Publication number: WO2011100912A2
Application number: PCT/CN2011/072676
Authority: WO
Inventors: 林建优; 戴丁樟; 黄鑫
Original assignee: 华为技术有限公司
Priority date: 2011-04-12
Filing date: 2011-04-12
Publication date: 2011-08-25
Also published as: CN102246567B; CN102246567A; WO2011100912A3

Abstract

A method, apparatus and radio network controller for outer loop power control processing are provided by the embodiments of the present invention. The method includes the following steps: if the transmission power of a terminal is limited, the maximum target value A of Dedicated Physical Control Channel (DPCCH) Signal Interference Ratio (SIR) is adjusted to B, wherein B is greater or equals to the initial target value of DPCCH SIR and is less than A; and the adjusted maximum target value of DPCCH SIR is transmitted to a base station. In the embodiments of the present invention, the maximum target value of DPCCH SIR is reduced to the initial target value of DPCCH SIR when the transmission power of a terminal is limited, and thus the dynamic range of the DPCCH SIR is reduced, so that the power proportion of the control channel is reduced, thereby the power proportion of the data channel is increased, the data transmission can be continued and the cell coverage is increased.

Description

Outer loop power control processing method, device and radio network controller

Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to an outer loop power control processing method, apparatus, and radio network controller. Background technique

CDMA (Code Divided Multiple Access) is a spread spectrum communication technology. The CDMA system is a self-interference system. All mobile users occupy the same bandwidth and frequency, and there are non-ideal correlation characteristics between the spreading codes used by users. For example, the "far-and-far effect" problem is particularly prominent, so the amount of user transmit power will directly affect the total capacity of the system, making power control technology one of the most important core technologies in CDMA systems. The near-far effect is: when the base station simultaneously receives signals from two terminals (User Equipment, referred to as UE) with different distances but the same power, the UE close to the base station will generate serious signals to the other UE. interference.

One of the goals of power control in a CDMA system is to make the UE's transmit power as small as possible while ensuring the quality of the user's communication. By making the UE's transmit power as small as possible, interference can be reduced, thereby increasing the capacity of the CDMA system.

The power control can be divided into uplink power control and downlink power control according to the direction; the uplink power control can control the transmit power of the UE, and the downlink power control can control the transmit power of the base station. Power control can be divided into open loop power control and closed loop power control according to whether the UE and the base station (NodeB) participate simultaneously. The UE and the NodeB participate in closed loop power control at the same time. Closed-loop power control is used to overcome path loss, fast fading and slow fading; closed-loop power control uses DPCCH (Dedicated Physical Control Channel) Signal Interference Ratio (SIR) measurement estimates and DPCCH The signal is compared with the target value (SIR _target ), the Transmit Power Control (TPC) command word is determined, and then the TPC command word is transmitted to the UE through the channel, and the UE adjusts the size of its own transmit power according to the TPC command word.

The closed loop power control can be divided into inner loop power control and outer loop power control. The mechanism of Outer Loop Power Control ( OLPC ) is: adjust the target value of inner loop control according to the quality of communication, so that the system can always The minimum power is used to meet the communication quality requirements. Figure 1 is a schematic diagram of existing uplink power control. As shown in Figure 1, in the uplink power control process, the power control between the NodeB and the UE is the inner loop power control, and the power control between the RNC (Radio Network Controller) and the NodeB is the outer loop power control. .

However, in the outer loop power control process, when the UE's transmit power is limited, the SIR target value of the DPCCH will always increase, which will cause the data channel power to drop too much, and finally cause the cell coverage to deteriorate. Summary of the invention

Embodiments of the present invention provide an outer loop power control processing method and apparatus, and a radio network controller to increase cell coverage by outer loop power control.

An embodiment of the present invention provides an outer loop power control processing method, including:

When the transmit power of the terminal is limited, the value of the maximum DPCCH SIR target value is adjusted from A to B, the B is greater than or equal to the value of the initial DPCCH SIR target value, and the B is smaller than the A;

The adjusted maximum DPCCH SIR target value is sent to the base station.

An embodiment of the present invention provides an outer loop power control processing apparatus, including:

a first adjustment module, configured to adjust a value of the maximum DPCCH SIR target value from A to B when the transmission power of the terminal is limited, where the B is greater than or equal to a value of the initial DPCCH SIR target value, and the B is smaller than A;

And a sending module, configured to send, to the base station, a maximum DPCCH SIR target value adjusted by the first adjustment module.

An embodiment of the present invention provides a radio network controller, including any outer loop power control processing apparatus provided by an embodiment of the present invention.

The outer loop power control processing method and apparatus and the radio network controller according to the embodiment of the present invention, when determining that the UE's transmit power is limited, the radio network controller adjusts the maximum DPCCH SIR target value, and sets the maximum DPCCH SIR target value. Decrease and send the adjusted maximum DPCCH SIR target value to the base station. In the embodiment of the present invention, when the transmit power of the UE is limited, the maximum DPCCH SIR target value is reduced to the initial DPCCH SIR target value, which can reduce the dynamic range of the DPCCH SIR, so that the power ratio of the control channel is reduced, thereby improving the data. Channel power The ratio allows data transmission to continue and increase cell coverage. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, a brief description of the drawings to be used in the description of the embodiments will be briefly made. It is obvious that the drawings in the following description are some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.

1 is a schematic diagram of an existing uplink power control;

2 is a flowchart of a method for processing an outer loop power control according to an embodiment of the present invention; FIG. 3 is a flowchart of a method for processing an outer loop power control according to another embodiment of the present invention; FIG. 4 is still another embodiment of the present invention; FIG. 5 is a schematic diagram of an outer loop power control processing apparatus according to an embodiment of the present invention; FIG. 6 is a schematic diagram of an outer loop power control processing apparatus according to another embodiment of the present invention; . detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The parameters involved in the outer loop power control mechanism include: initial DPCCH SIR target value, maximum DPCCH SIR target value and minimum DPCCH SIR target value. The initial DPCCH SIR target value is set according to a typical environment, for example, configured by the RNC to the NodeB when the RL (Radio Link) is established or reconfigured; the maximum DPCCH SIR target value is the DPCCH SIR target value can be adjusted to The maximum value is used to prevent the DPCCH SIR target value from being abnormally adjusted to a large value, resulting in excessive power consumption of the DPCCH channel, affecting data transmission; The minimum DPCCH SIR target value is the minimum value that the DPCCH SIR target value can be adjusted to. It is used to prevent the DPCCH SIR target value from being adjusted to a small value. If the DPCCH SIR target value is abnormally adjusted to a small value, it is easy to cause problems such as dropped calls. The inventor has found that in the outer loop power control process, when the transmit power of the UE is limited, the SIR target value of the DPCCH is always raised to the maximum DPCCH SIR target value, since the maximum DPCCH SIR target value is usually large, thus causing The data channel power drops too much, which eventually leads to cell coverage degradation.

2 is a flowchart of an outer loop power control processing method according to an embodiment of the present invention. As shown in FIG. 2, the method includes:

Step 201: When the UE's transmit power is limited, adjust the value of the maximum DPCCH SIR target value from A to B. Where B is greater than or equal to the value of the initial DPCCH SIR target value, and B is less than A.

The executive body of this embodiment may be an RNC, or other network control device.

When the transmit power of the UE is limited, the UE may report to the base station or the RNC. When the base station receives the report from the UE, the base station may report the UE transmit power to the RNC. Therefore, the RNC can obtain whether the UE transmit power is limited. The transmit power of the UE is limited when the transmit power of the UE reaches the upper limit of the transmit power at a preset time.

When the RNC determines that the UE's transmit power is limited, the RNC lowers the maximum DPCCH SIR target value, and adjusts the value of the maximum DPCCH SIR target value to a value greater than or equal to the initial DPCCH SIR target value. It can be understood that the adjustment The subsequent value is less than the value of the original maximum DPCCH SIR target value.

Step 202: Send the adjusted maximum DPCCH SIR target value to the base station, so that the base station performs inner loop power control according to the adjusted maximum DPCCH SIR target value.

In the embodiment of the present invention, when the UE transmit power is limited, the maximum DPCCH SIR target value is reduced, and the dynamic range of the DPCCH SIR can be reduced, so that the power ratio of the control channel is reduced, thereby improving the power ratio of the data channel, so that the data transmission can be performed. Continue, and increase cell coverage.

In another embodiment, the case where the transmission power of the HSUPA (High Speed Uplink Packet Access) user and the R99 user is limited is taken as an example, and the value of the maximum DPCCH SIR target value is adjusted. A numerical value equal to the initial DPCCH SIR target value is taken as an example. It can be understood that when the value of the maximum DPCCH SIR target value is reduced to other values, the power ratio of the data channel can also be increased, so that the transmission of the data transmission in the UE is limited, and the cell coverage is increased. When the transmit power of the HSUPA user is limited, the UE (the HSUPA user) has no remaining transmit power, and the UE selects the E-TFCK E-DCH Transport Format Combination Indicator, the enhanced dedicated channel transport format combination indicator) corresponding to the data block. The size will be reduced. If the UE is configured with the minimum value of the E-TFCI, the E-TFCI selected by the UE will be reduced to the configured minimum value when the transmit power is limited. It can be understood that the E-TFCI is used to indicate the size of the corresponding data block, and the larger data block requires a larger transmission power. If the UE's selected E-TFCI is reduced to the configured minimum value, the UE's transmit power continues to be limited, and when the E-TFCI is selected, the UE's total transmit power (the transmit power of all channels) exceeds the maximum transmit power, then The UE will reduce the Ped/pc (data channel gain factor) corresponding to the E-TFCI, that is, reduce the EDPDCH (Enhanced Dedicated Physical Data Channel) PO (power offset); and the EDPDCH PO The number of HARQ (Hybrid Automatic Repeat Request) retransmission times (NHR) becomes larger, and the NHR change causes the DPCCH SIR target value to become larger, and the DPCCH SIR target value becomes larger. The assembly causes the DPCCH transmission power to become larger, and the DPCCH transmission power becomes larger, which causes the EDPDCH PO to decrease, thereby forming a vicious circle. Moreover, when the target NHR is compared with the average value of the actual NHR, the DPCCH SIR target value has the characteristics of rapid rise and fall, and will soon rise to the maximum DPCCH SIR target value, and the maximum DPCCH SIR target value is 14 dB. The maximum DPCCH SIR target value is set to the initial DPCCH SIR target value (generally 8dB), and EDPDCH PO is more likely to become zero (because EDPCCH PO is unchanged, HS-DPCCH PO is unchanged, total transmit power is unchanged), and data transmission is more Easy to terminate, easier to drop words. The maximum DPCCH SIR target value is set to the initial DPCCH SIR target value (for example, 8 dB). Relatively speaking, the proportion of DPCCH in the total transmit power of the UE can be reduced, and the power ratio of the data channel is increased, so that the data transmission is continued. , the coverage is enhanced, which will bring greater gain. Once the user's transmit power is changed from limited to unrestricted, the maximum DPCCH SIR target value is restored (for example, l ldB or 14 dB). It can be understood that the maximum DPCCH SIR target value can be referred to the protocol. Provisions. Thus, when the user's transmit power is limited, the user's maximum DPCCH SIR target value is lowered, for example, as an initial DPCCH SIR target value (for example, 8 dB), which can improve user throughput and increase cell coverage. The maximum DPCCH SIR target value and the initial DPCCH SIR target value range from -8.2 to 17.3 dB (see Protocol 25.214), and the maximum DPCCH SIR target value is greater than the initial DPCCH. The SIR target value, the specific value can be configured according to the actual situation.

When the transmit power of the R99 user is limited, the Block Error Rate (BLER) of the data transmission will rise, the OLPC will raise the DPCCH SIR target value, and when the target BLER is small, the DPCCH SIR target value has The characteristics of fast rise and fall are quickly increased to the maximum DPCCH SIR target value, whereby the maximum DPCCH SIR target value is the initial DPCCH SIR target value plus a preset value (for example, 3 dB, see the provisions in the prior art) In the case where the target value of the maximum DPCCH SIR is set to the initial DPCCH SIR target value, the DPCCH occupies a larger transmission power, thereby causing the available power of the DPDCH to be lowered, and the data transmission is more likely to terminate, making it easier to drop calls. When the target value of the maximum DPCCH SIR is set to the initial DPCCH SIR target value, the proportion of DPCCH in the total transmit power of the UE can be reduced, the power ratio of the data channel is increased, the throughput of the user is increased, and the cell capacity is increased. Once the user's transmit power is changed from restricted to unrestricted, the maximum DPCCH SIR target value is restored.

In the embodiment of the present invention, when determining that the UE's transmit power is limited, the RNC adjusts the value of the maximum DPCCH SIR target value, reduces the maximum DPCCH SIR target value, and transmits the adjusted maximum DPCCH SIR target value to the base station. In the embodiment of the present invention, when the transmit power of the UE is limited, the maximum DPCCH SIR target value is reduced, the dynamic range of the DPCCH SIR can be reduced, and the power ratio of the control channel is reduced, thereby improving the power ratio of the data channel, so that Data transmission continues and cell coverage is increased.

FIG. 3 is a flowchart of a method for processing an outer loop power control according to another embodiment of the present invention. As shown in FIG. 3, the method includes:

Step 301: When the RNC obtains that the UE's transmit power is limited, the RNC adjusts the value of the maximum DPCCH SIR target value from A to B, and sends the adjusted maximum DPCCH SIR target value to the base station. Where B is greater than or equal to the value of the initial DPCCH SIR target value, and B is less than A.

The execution body of this embodiment may be an RNC. The manner in which the RNC obtains whether the UE's transmit power is limited may include:

The first mode: If the RNC receives the first restricted message reported by the UE, the RNC acquires the UE's transmit power limitation. Specifically, when the transmit power of the UE is limited, the UE reports the restricted message to the base station or the RNC. When the UE reports the restricted message to the base station, the base station may report the power limitation of the UE to the RNC. For example: when the UE measures the transmit power for a period of time above a threshold (this When the threshold is the upper limit of the transmit power, the 6A event is reported to the RNC to indicate that the current power of the UE is limited. When the UE measured the transmit power for a period of time below a threshold, the 6B event is reported to the RNC, indicating that the current power of the UE is not limited (see the protocol 25.331).

The second mode: If the RNC receives the second restricted message that is reported by the base station to indicate that the UE transmit power is limited, the RNC acquires the UE's transmit power is limited. For example, the base station learns the current remaining transmit power size of the UE according to the UPH (UE transmit power headroom) measurement value reported by the UE, and then compares the currently remaining transmit power of the UE with the maximum transmit power to obtain the UE. The currently used transmit power, and then compare the currently used transmit power size with the predetermined power threshold. If the transmit power is greater than the upper limit of the predetermined power threshold or the transmit power is less than the lower limit of the predetermined power threshold, The transmit power of the UE is limited. If the base station obtains the transmit power of the UE, the base station reports the RNC through the second restricted message.

Step 302: After adjusting the value of the maximum DPCCH SIR target value from A to B, when the transmit power of the UE is not limited, the RNC adjusts the value of the maximum DPCCH SIR target value to A, and adjusts the maximum DPCCH SIR. The target value is sent to the base station.

After the RNC adjusts the value of the maximum DPCCH SIR target value in step 301, if the RNC acquires that the UE's transmit power returns to normal, that is, the RNC determines that the UE's transmit power is not limited, the RNC resumes the maximum DPCCH SIR target value and will recover. The maximum DPCCH SIR target value is sent to the base station to enable the base station to perform inner loop power control based on the recovered maximum DPCCH SIR target value. It should be noted that, when the RNC determines that the UE's transmit power is not limited, and restores the maximum DPCCH SIR target value, the maximum DPCCH SIR target value may be adjusted to A, or a new value such as C may be obtained according to the channel environment, and then Adjust the maximum DPCCH SIR target value to C; where C is greater than B.

In addition, in the existing outer loop power control process, in the process of QoS (Quality of Service) parameters converge to the target value, in order to avoid the occurrence of error block, the delay is large or to avoid the convergence success rate is low, usually Both set a higher DPCCH SIR target value, resulting in wasted power resources. In this embodiment, in order to improve the power resource utilization, the time of the higher DPCCH SIR target value may be minimized after the QoS parameter converges to the target value. Thus, the embodiment may further include the following steps:

Step 303: After the QoS parameter converges to the target value, adjust the DPCCH SIR according to the first step length. Target value until the DPCCH SIR target value drops to the preset threshold.

Specifically, the convergence of the QoS parameter to the target value may be performed when the radio bearer (RB) is completed, where the RB establishment may be in a connection establishment scenario or may be in a re-established scenario. The example is not limited. That is to say, when the RB establishment is completed, the QoS parameters converge to the target value, and the DPCCH SIR target value is adjusted according to the first step length.

The QoS parameters include: BLER, Bit Error Rate (BER), Fame Error Rate (FER), or NHR. Parameters such as BLER, bit error rate or frame error rate can be applied to the R99 (a protocol version) system; NHR can be applied to the HSUPA system.

In this step, after the QoS parameter converges to the target value, the RNC lowers the current DPCCH SIR target value by a larger step size, so that the current DPCCH SIR target value decreases faster until the DPCCH SIR target value is lowered to A preset threshold. The preset threshold may be an average value of the DPCCH SIR target value when the channel environment is good. As a result, power efficiency and throughput can be improved, and power resource utilization can be improved.

Step 304: After the DPCCH SIR target value falls to a preset threshold, adjust the first step length to the second step. The first step is longer than the second step.

After the RNC drops the DPCCH SIR target value to the preset threshold, the RNC adjusts the step size of the DPCCH SIR target value to the second step, where the second step is smaller than the first step, that is, the DPCCH is shortened. The step size at which the SIR target value drops causes the DPCCH SIR target value to decrease at a slower rate. In the process in which the RNC lowers the DPCCH SIR target value, the RNC periodically transmits a DPCCH SIR target value to the base station, where the period is a preset period.

In the outer loop power control, the RNC may determine the DPCCH SIR target value according to the quality of service (QoS), so that the base station adjusts the inner loop control according to the DPCCH SIR target value, so that the UE can always satisfy the communication quality with the minimum power. Claim. The QoS may include: a BLER of the received signal, a bit error rate, or a frame error rate. For example, the formula for calculating the adjustment amount of 0? €01 811 target value based on the 81^1 measurement value is:

ASIR = S/R adjustment factor · S/R adjustment length · ^£i ^ measurement value - ^ target value

The target value is thus, when the step size of the drop (SIR adjustment step) is increased, the DPCCH SIR target value drops faster. The specific data of the first step and the second step can be configured according to the specific situation. In the embodiment of the present invention, in addition to the beneficial effects of the embodiment shown in FIG. 2, after the QoS parameter converges to the target value, the step of increasing the DPCCH SIR target value can be minimized by increasing the step size of the descending step. This can improve power efficiency and throughput.

In the existing outer loop power control process, when the RNC receives a block error, it will increase the DPCCH SIR target value. Therefore, when consecutive error blocks occur due to severe interference, the DPCCH SIR target value will rise. Lead to waste of power resources. In order to solve this problem, the embodiment of the present invention provides the scheme shown in Fig. 4.

FIG. 4 is a flowchart of a method for processing an outer loop power control according to another embodiment of the present invention. As shown in FIG. 4, the embodiment may further include the following steps on the basis of the embodiment shown in FIG. 2 or FIG. 3: Step 401: When the RNC receives the error block report message reported by the base station and indicates the kth error block sent by the UE, the RNC adjusts the DPCCH SIR target value. It can be understood that the adjusted DPCCH SIR target value is sent to the base station according to a preset period, and how to transmit the DPCCH SIR target value to the base station can comply with the provisions of the protocol, which is not further limited by the present invention.

Step 402: If the RNC receives the error block reporting message reported by the base station and indicates the k+mth error block sent by the UE, the DPCCH SIR target value remains unchanged. Where m is a constant greater than or equal to 1, and m is configurable. That is, in the preset time period after the time t, even if the RNC receives the error block report message reported by the base station for indicating the k+mth error block sent by the UE, the DPCCH SIR target value is not adjusted, but Keep the DPCCH SIR target value unchanged.

Specifically, the step 401 - step 402 may be: when receiving a block error at a certain time t, the RNC raises the DPCCH SIR target value, and if the error is received again within a preset time period after the time t Block, it indicates that the system has serious interference. At this time, the RNC does not adjust the DPCCH SIR target value. After the preset time period, if the error block is received again, the system does not think that the system has serious interference, so this time It is possible to adjust the DPCCH SIR target value.

In addition to the beneficial effects of the embodiment shown in FIG. 2, the embodiment of the present invention can also adjust the DPCCH SIR target value when the error block is continuously received due to severe interference, thereby improving the utilization of power resources. FIG. 5 is a schematic diagram of an outer loop power control processing apparatus according to an embodiment of the present invention. As shown in FIG. 5, the apparatus includes: a first adjustment module 51 and a sending module 53.

The first adjustment module 51 is configured to adjust the value of the maximum DPCCH SIR target value from A to B, B is greater than or equal to the value of the initial DPCCH SIR target value, and B is less than A when the transmission power of the terminal is limited.

The sending module 53 is configured to send the maximum DPCCH SIR target value adjusted by the first adjusting module 51 to the base station.

The outer loop power control processing apparatus provided in this embodiment is used to implement the method embodiment shown in FIG. 2. For the working process and working principle of each module in this embodiment, refer to the description in the method embodiment shown in Figure 2 above, and details are not described herein.

In the embodiment of the present invention, when determining that the UE's transmit power is limited, the first adjustment module adjusts the maximum DPCCH SIR target value, reduces the maximum DPCCH SIR target value, and the adjusted maximum DPCCH SIR target is sent by the sending module. The value is sent to the base station. In the embodiment of the present invention, when the transmit power of the UE is limited, the maximum DPCCH SIR target value is reduced, and the dynamic range of the DPCCH SIR can be reduced, so that the power ratio of the control channel is reduced, thereby improving the power ratio of the data channel, so that Data transmission continues and cell coverage is increased.

FIG. 6 is a schematic diagram of an outer loop power control processing apparatus according to another embodiment of the present invention. On the basis of the embodiment shown in FIG. 5, as shown in FIG. 6, the apparatus may further include: a second adjustment module 55.

Further, the device may further include: a first step adjustment module 57 and a second step adjustment module 59; or the device may further include: a third adjustment module 50 and a holding module 52.

The second adjustment module 55 is configured to adjust the value of the maximum DPCCH SIR target value to A after the first adjustment module 51 adjusts the value of the maximum DPCCH SIR target value from A to B, when the transmission power of the terminal is not limited. The adjusted maximum DPCCH SIR target value is sent to the base station.

The first step length adjustment module 57 is configured to adjust the DPCCH SIR target value according to the first step length after the QoS parameter converges to the target value, until the DPCCH SIR target value falls to a preset threshold.

The second step adjustment module 59 is configured to adjust the DPCCH SIR target value by the second step after the first step length adjustment module 57 adjusts the DPCCH SIR target value to the preset threshold value; the first step length is greater than the second step. long.

The third adjustment module 50 is configured to receive, at the time t, the reported by the base station to indicate that the terminal sends the When the error block of the kth error block is reported, the DPCCH SIR target value is adjusted.

The maintaining module 52 is configured to keep the DPCCH SIR target value unchanged if the error block reporting message reported by the base station for indicating the k+mth error block sent by the terminal is received within a preset time period after the time t. Where m is a constant greater than or equal to 1.

The outer loop power control processing apparatus provided in this embodiment is used to implement the method embodiment shown in Figs. For the working process and working principle of each module in this embodiment, refer to the description in the method embodiment shown in FIG. 2 to FIG. 4, and details are not described herein again.

In the embodiment of the present invention, in addition to the beneficial effects of the embodiment shown in FIG. 5, after the QoS parameter converges to the target value, the step size of the descending module is increased by the first step length adjustment module to minimize the higher DPCCH SIR. The time of the target value, thereby improving the power efficiency and the throughput rate; and also, when the error block is continuously received due to severe interference, the DPCCH SIR target value is not adjusted by stopping the adjustment module, thereby improving the utilization of the power resource. .

The embodiment of the invention further provides a radio network controller, which includes the outer loop power control processing device shown in FIG. 5 or FIG. 6.

For the working process and working principle of each module in this embodiment, refer to the description in the method embodiment shown in FIG. 2 to FIG. 4, and details are not described herein again.

In the embodiment of the present invention, when the transmit power of the UE is limited, the radio network controller reduces the maximum DPCCH SIR target value, which can reduce the dynamic range of the DPCCH SIR, so that the power ratio of the control channel is reduced, thereby improving the power of the data channel. Proportion, allowing data transmission to continue, and increasing cell coverage; the radio network controller can also minimize the time of the higher DPCCH SIR target value by increasing the step size of the descent after the QoS parameter converges to the target value, This can improve power efficiency and throughput; and the radio network controller can also improve the utilization of power resources by not adjusting the DPCCH SIR target value when the block is continuously received due to severe interference.

It should be noted that embodiments of the present invention can be applied to a CDMA system or a WCDMA system to control uplink power. A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing storage device includes the following steps: The foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk. It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

An outer loop power control processing method, comprising:

When the transmission power of the terminal is limited, the value of the maximum dedicated physical control channel DPCCH signal to interference ratio SIR target value is adjusted from A to B, the B is greater than or equal to the value of the initial DPCCH SIR target value, and the B is smaller than A;

The adjusted maximum DPCCH SIR target value is sent to the base station.

2. The method according to claim 1, further comprising:

After adjusting the value of the maximum DPCCH SIR target value from the A to the B, when the transmission power of the terminal is not limited, the value of the maximum DPCCH SIR target value is adjusted to the A, And transmitting the adjusted maximum DPCCH SIR target value to the base station.

The method according to claim 1 or 2, further comprising:

When the QoS parameter converges to the target value, the DPCCH SIR target value is adjusted according to the first step length until the DPCCH SIR target value falls to a preset threshold;

After the DPCCH SIR target value falls to a preset threshold, the DPCCH SIR target value is adjusted in a second step, the first step length being greater than the second step size.

The method according to claim 3, wherein the QoS parameter converges to the target value comprises: wirelessly establishing the completion of the load.

The method according to claim 3, wherein the QoS parameters comprise: a block error rate, a bit error rate, a frame error rate or a hybrid automatic repeat request HARQ retransmission number.

The method according to any one of claims 1 to 5, further comprising: receiving, at time t, an error reported by the base station to indicate a kth error block sent by the terminal Adjusting the DPCCH SIR target value when the message is "3⁄4" on the block;

Maintaining the DPCCH SIR target value if the error block reporting message reported by the base station for indicating the k+mth error block sent by the terminal is received in the preset time period after the time t Invariant, where m is a constant greater than or equal to 1.

7. An outer loop power control processing device, comprising:

a first adjustment module, configured to adjust a value of a maximum dedicated physical control channel DPCCH signal to interference ratio SIR target value from A to B when the transmission power of the terminal is limited, where the B is greater than or equal to a value of the initial DPCCH SIR target value. And the B is smaller than the A; And a sending module, configured to send, to the base station, the maximum DPCCH SIR target value adjusted by the first adjustment module.

8. The device according to claim 7, further comprising:

a second adjustment module, configured to: after the first adjustment module adjusts a value of the maximum DPCCH SIR target value from the A to the B, when the transmit power of the terminal is not limited, The value of the maximum DPCCH SIR target value is adjusted to the A, and the adjusted maximum DPCCH SIR target value is transmitted to the base station.

The device according to claim 7 or 8, further comprising:

a first step adjustment module, configured to: after the QoS parameter converges to the target value, adjust the DPCCH SIR target value according to the first step until the DPCCH SIR target value falls to a preset threshold;

a second step adjustment module, configured to adjust the DPCCH SIR target value by a second step after the first step length adjustment module decreases the DPCCH SIR target value to a preset threshold value, where The step length is greater than the second step size.

The device according to any one of claims 7-9, further comprising: a third adjusting module, configured to receive, by the base station, at the time t, indicating that the terminal sends the Adjusting the DPCCH SIR target value when the error block of the kth error block is reported; the holding module is configured to: if the received time is reported by the base station, in the preset time period after the time t The error block reporting message of the k+mth error block sent by the terminal keeps the DPCCH SIR target value unchanged, where m is a constant greater than or equal to 1.

A radio network controller comprising the outer loop power control processing apparatus according to any one of claims 7-10.