CN1859030A - WCDMA internal loop power control system and calculating device for power control regulating content - Google Patents
WCDMA internal loop power control system and calculating device for power control regulating content Download PDFInfo
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Abstract
This invention discloses a computation device for the power control adjust volume including a computation unit receiving the power control TPC order to compute and get a first middle value of the adjust volume to be transmitted, a storage unit receiving the first middle value of the volume to be stored then computing and getting a second middle value of the adjustment volume to be transmitted, a step computation unit connected with said computation unit and receiving the first computation parameter including a fixed step length and indication signals of the compressed resumption period to get a related step length to be transmitted to said computation unit, which receives the second computation parameter, the second middle value of the adjustment volume and the step length to get the power control adjustment volume based on the parameter, which also provides an internal cycle power control system of the WCDMA and the WCDMA and the computing device is realized by pure hardware.
Description
Technical Field
The present invention relates to a WCDMA (Wideband CDMA, Wideband code division multiple access) mobile communication technology, particularly to a WCDMA system power control technology.
Background
The WCDMA mobile communication system is an interference limited system, and its system capacity is mainly limited by the interference between each mobile station and the base station in the system due to the "near-far effect", so if the signal of each mobile station reaches the base station with the minimum signal-to-noise ratio required to ensure the communication quality, the capacity of the WCDMA system will be maximized. The power control is a technology adopted for overcoming the near-far effect, and the technology is used for timely compensating fading introduced into a wireless channel on the basis of evaluating received signal energy or demodulation signal-to-noise ratio indexes of a receiver end, so that high-quality communication is maintained, interference on other users in the same wireless resource is avoided, and the system capacity is ensured. Therefore, in WCDMA systems, power control is known to be the core of all key technologies.
Common WCDMA power control techniques can be divided into three types, open-loop power control, closed-loop power control, and outer-loop power control. The inner loop power control of the downlink dedicated channel in the power control process in the WCDMA system of the prior art is described as follows:
the transmit power of the downlink channel is determined by the network and varies over time. The power value specified by the higher layer is the total transmit power, i.e., the sum of the two diversity antenna power values when there is diversity. For the downlink Dedicated Channel, the downlink power Control process controls the DPCCH (Dedicated Physical Control Channel) and the corresponding DPDCHs (Dedicated Physical Data Channel) at the same time, and the adjustment amounts are the same. The relative Power offsets between the DPCCH and DPDCHs are determined by the network, and the Power offsets of TFCI, TPC (Transmit Power Control) and pilot fields with respect to the DPDCHs are PO1, PO2 and PO3dB, respectively, and are also time dependent.
The UE (User Equipment) sends a TPC command word generated by the UE in the TPC field of the uplink DPCCH to control the network downlink transmit power. After receiving the TPC command word sent by the UE, the UTRAN (Universal Terrestrial Radio Access Network, global Terrestrial Radio Access Network) adjusts the power of the downlink DPCCH/DPDCH correspondingly, once every slot. When the kth TPC command word is estimated, UTRAN adjusts the current downlink power P (k-1) [ dB ] to a new power P (k) according to the following formula:
P(k)＝P(k-1)+PTPC(k)+Pbal(k) in which P isTPC(k) Denotes the inner loop power control adjustment amount, P, of the k-th timebal(k) Is the power balancing power adjustment amount of the k-th time.
Existing inner loop power control adjustment calculation PTPC(k) Usually implemented by a high-speed DSP (digital signal Processor) through software computation, has the following disadvantages:
1. due to the inherent defect of software, the operation speed is low, so that the software processing time is long, the reading and writing of instructions and data need a long period, the requirement of real-time calculation cannot be met, the processing time delay consumed by the power control processing of a plurality of channels is usually long, and more channels cannot be supported;
2. limited by the DSP processor capabilities;
3. the interface is added, and high requirements are put on interface flow, DSP load and the like.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a WCDMA inner loop power control system and a power control adjustment calculating device, wherein the power control adjustment calculating device is realized by hardware, and the defect of low operation speed in the prior art is overcome.
The WCDMA inner loop power control system provided by the invention comprises a downlink TPC command extraction device and a power control adjustment calculation device, wherein the power control adjustment calculation device comprises:
a calculating unit, receiving the power control TPC command sent by the downlink TPC command extracting device, calculating to obtain and send a first intermediate value of adjustment;
the storage unit is used for receiving the first intermediate value of the adjustment and the window length value sent by the calculation unit, storing the first intermediate value of the adjustment, calculating according to the window length value to obtain a second intermediate value of the adjustment and sending the second intermediate value of the adjustment;
the step length calculating unit is connected with the calculating unit, receives a first calculating parameter, calculates the corresponding step length according to the first calculating parameter and sends the corresponding step length to the calculating unit, wherein the first calculating parameter comprises a fixed step length and a compression recovery period indicating signal;
the calculating unit receives a second calculating parameter, the second intermediate value of the adjustment sent by the storing unit and the step length sent by the step length calculating unit, the second calculating parameter comprises the power control TPC command, a compression indication signal and a power increase limiting value, and the power control adjustment is calculated according to the second calculating parameter, the second intermediate value of the adjustment and the step length.
As a preferred technical solution, the power control adjustment amount calculating device further includes an initial window length indicating unit, where the initial window length indicating unit receives the window length value and the limited power increase activation indicating signal, determines whether the current time slot is at an initial window length, and outputs a corresponding initial window length indicating signal to the calculating unit according to a determination result.
As a preferred technical solution, the calculating unit includes:
a first intermediate value adjusting calculation module, configured to receive the TPC command sent by the downlink TPC extraction device, the step size sent by the step size calculation unit, and the compression indication signal, calculate to obtain a first intermediate value to be adjusted, and send the first intermediate value to be adjusted;
the window length inner accumulated value calculation module receives the second intermediate value of the adjustment sent by the storage unit and calculates to obtain the sum delta of the power control adjustment in the window lengthsum(k) And sending;
a limited power increase TPC generation module for receiving the delta sent by the accumulated value calculation module in the window lengthsum(k) Calculating the step length and the power increase limiting value sent by the step length calculating unit to obtain and send the limited power increase TPC;
and the power control adjustment quantity calculation module receives the limited power increase TPC sent by the limited power increase TPC generation module and the step length sent by the step length calculation unit, and multiplies the limited power increase TPC and the step length to obtain the power control adjustment quantity.
As a preferred technical solution, the power control adjustment amount calculation apparatus further includes a channel round robin counter, which sends a read address or/and a write address to the storage unit and the calculation unit, where the read address or/and the write address is used to indicate a channel corresponding to the storage unit and the internal memory of the calculation unit.
The invention provides a power control adjustment amount calculation device, comprising:
the calculation unit receives the power control TPC command, calculates to obtain and sends an adjusted first intermediate value;
the storage unit is used for receiving the first intermediate value of the adjustment and the window length value sent by the calculation unit, storing the first intermediate value of the adjustment, calculating according to the window length value to obtain a second intermediate value of the adjustment and sending the second intermediate value of the adjustment;
the step length calculating unit is connected with the calculating unit, receives a first calculating parameter, calculates the corresponding step length according to the first calculating parameter and sends the corresponding step length to the calculating unit, wherein the first calculating parameter comprises a fixed step length and a compression recovery period indicating signal;
the calculating unit receives a second calculating parameter, the second intermediate value of the adjustment sent by the storing unit and the step length sent by the step length calculating unit, the second calculating parameter comprises the power control TPC command, a compression indication signal and a power increase limiting value, and the power control adjustment is calculated according to the second calculating parameter, the second intermediate value of the adjustment and the step length.
As a preferred technical solution, the mobile terminal further includes an initial window length indicating unit, wherein the initial window length indicating unit receives the window length value and the limited power increase activation indicating signal, determines whether the current time slot is in the initial window length, and outputs a corresponding initial window length indicating signal to the calculating unit according to the determination result.
As a preferred technical solution, the calculating unit includes:
a first intermediate value adjusting calculation module, configured to receive the TPC command sent by the downlink TPC extraction device, the step size sent by the step size calculation unit, and the compression indication signal, calculate to obtain a first intermediate value to be adjusted, and send the first intermediate value to be adjusted;
the window length inner accumulated value calculation module receives the second intermediate value of the adjustment sent by the storage unit and calculates to obtain the sum delta of the power control adjustment in the window lengthsum(k) And sending;
a limited power increase TPC generation module for receiving the delta sent by the accumulated value calculation module in the window lengthsum(k) Calculating the step length and the power increase limiting value sent by the step length calculating unit to obtain and send the limited power increase TPC;
and the power control adjustment quantity calculation module receives the limited power increase TPC sent by the limited power increase TPC generation module and the step length sent by the step length calculation unit, and multiplies the limited power increase TPC and the step length to obtain the power control adjustment quantity.
As a preferred technical solution, the device further includes a channel round robin counter, which sends a read address or/and a write address to the storage unit and the computing unit, where the read address or/and the write address is used to indicate a channel corresponding to the storage unit and the internal memory of the computing unit.
As a preferred solution, the step calculating unit includes:
the recovery period step calculator is used for calculating and obtaining the recovery period step and sending the recovery period step;
and the first selector receives a fixed step value and the recovery period step length sent by the recovery period step length calculator, and selects to output the recovery period step length when the compressed recovery period indication signal indicates that the current recovery period is in the recovery period, otherwise selects to output the fixed step value.
As a preferred technical solution, the storage unit includes:
the shifter receives the first intermediate value of the adjustment sent by the calculation unit, shifts to obtain an effective part of the first intermediate value of the adjustment, and shifts to obtain an effective value in the window length and sends the effective value;
the adjustment memory is used for receiving the effective value in the window length sent by the shifter, storing the effective value and sending the effective value to the shifter for shifting;
and the multiplexer receives the effective value in the window length sent by the adjustment quantity memory, selects the corresponding effective value as an adjustment second intermediate value according to the window length value and sends the adjustment second intermediate value to the computing unit.
Based on the power control adjustment calculating device of the present invention, the present invention also provides a WCDMA system, including a WCDMA inner loop power control system, where the WCDMA inner loop power control system includes a downlink TPC command extracting device and a power control adjustment calculating device, and includes:
a calculating unit, receiving the power control TPC command sent by the downlink TPC command extracting device, calculating to obtain and send a first intermediate value of adjustment;
the storage unit is used for receiving the first intermediate value of the adjustment and the window length value sent by the calculation unit, storing the first intermediate value of the adjustment, calculating according to the window length value to obtain a second intermediate value of the adjustment and sending the second intermediate value of the adjustment;
the step length calculating unit is connected with the calculating unit, receives a first calculating parameter, calculates the corresponding step length according to the calculating parameter and sends the corresponding step length to the calculating unit, wherein the first calculating parameter comprises a fixed step length and a compression recovery period indicating signal;
the calculating unit receives a second calculating parameter, the second intermediate value of the adjustment sent by the storing unit and the step length sent by the step length calculating unit, the second calculating parameter comprises the power control TPC command, a compression indication signal and a power increase limiting value, and the power control adjustment is calculated according to the second calculating parameter, the second intermediate value of the adjustment and the step length.
According to the technical scheme, the power control adjustment amount calculating device is realized by pure hardware, and the advantages of the pure hardware greatly improve the signal processing speed, so that the processing time is reduced, the reading and writing periods of instructions and data are shortened, the real-time processing capacity of the system is enhanced, the power control can be in effect in time, the power control is not limited to the processing capacity of a DSP (digital signal processor), and more channels can be supported;
a channel round-robin counter is arranged to send read-write addresses to internal memories in a storage unit and a calculation unit, and the consumption of logic resources is reduced in a time division multiplexing mode;
the hardware interface of the invention is very simple and can bear larger interface flow.
Drawings
FIG. 1 is a block diagram of a WCDMA inner loop power control system of the present invention;
FIG. 2 is a block diagram of a power control adjustment calculation apparatus according to the present invention;
FIG. 3 is an internal structural view of a step size calculating unit according to the present invention;
FIG. 4 is an internal structural view of a memory cell according to the present invention;
FIG. 5 is an internal structural view of an initial window length indicating unit according to the present invention;
FIG. 6 is an internal structural view of a computing unit according to the present invention;
fig. 7 is a timing diagram of channels in the WCDMA inner loop power control system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The core idea of the invention is to provide a downlink inner loop power control adjustment quantity P which can be realized by hardware by simplifying inner loop power control and limited power increasing algorithm of a downlink dedicated channelTPC(k) The computing device of (1). The invention greatly improves the signal processing speed by utilizing the advantages of pure hardware and enhances the real-time processing capability of the system.
PTPC(k) The calculation method of (2) is as follows:
PTPC(k)＝ΔTPCp _ tpc, whereinTPCFor the power control step length, there can be 4 values: 0.5, 1, 1.5 or 2dB, p _ TPC is the actual TPC command calculated for inner loop power control, and there are 3 values: -1, 0 or 1. In the description of the present specification, all denote multiplication numbers.
If the limited power increase is ineffective, the adjustment quantity of the inner loop power control at the k time is calculated as the formula (1)
If the limited power increase is effective, the calculation of the inner loop power control adjustment quantity of the kth time is as the formula (2):
wherein, <math> <mrow> <msub> <mi>Δ</mi> <mi>sum</mi> </msub> <mrow> <mo>(</mo> <mi>k</mi> <mo>)</mo> </mrow> <mo>=</mo> <munderover> <mrow> <mi></mi> <mo>∑</mo> </mrow> <mrow> <mi>i</mi> <mo>=</mo> <mi>k</mi> <mo>-</mo> <mi>Window</mi> <mo>_</mo> <mi>Size</mi> </mrow> <mrow> <mi>k</mi> <mo>-</mo> <mn>1</mn> </mrow> </munderover> <msub> <mi>P</mi> <mi>TPC</mi> </msub> <mrow> <mo>(</mo> <mi>i</mi> <mo>)</mo> </mrow> <mo>[</mo> <mi>dB</mi> <mo>]</mo> </mrow> </math>
i.e. the sum of the previous Window _ Size sub-inner loop Power control adjustments, where Window _ Size represents the Window length value and Power _ rate _ Limit represents the Power Limit value, which are parameters configured by the UTRAN.
For the first (Window _ Size-1) adjustments just before the limited power increase is activated, this is achieved by replacing equation (2) with equation (1).
In the compressed mode, the transmission of the downlink DPDCH(s) and DPCCH are turned off in the compressed gaps of the compressed frame, and the power of the DPDCH and DPCCH in the first slot after the compressed gaps should be equal to the power of the slot before compression. In the RPL time slots of the compression recovery period after the compression gap, the power control step length is deltaRP-TPC。
The RPL length is equal to the minimum between the compression gap length and 7 slots, and if a compression gap occurs before the end of an RPL slot, the compression recovery period ends at the beginning of the gap, and the RPL length is reduced accordingly.
ΔRP-TPCCalled the recovery period step size, in dB, DeltaRP-TPCEqual to 3dB and 2 DeltaTPCThe minimum value in between.
As shown in FIG. 1, according to PTPC(k) The WCDMA inner loop power control system provided by the invention comprises a base station receiver, a Signal-to-Interference Ratio (SIR) measuring device, an uplink TPC generating device, a base station transmitter, a downlink TPC command extracting device and a power control adjustment amount calculating device.
And the base station receiver is used for receiving the radio frequency signal sent by the UE, converting the radio frequency signal into a baseband signal, then carrying out processing such as despreading, demodulation, channel decoding and the like, and restoring the baseband signal into user original information and various signaling.
The signal-to-noise ratio measuring device is used for measuring the signal-to-noise ratio sent by the base station and sending the measured value to the uplink TPC generating device;
an uplink TPC generating device for generating uplink TPC bits according to the measurement value sent by the signal-to-noise ratio measuring device and sending the uplink TPC bits to the base station transmitter;
a downlink TPC command extracting device for extracting the adjusting signal sent by the base station receiver, generating a downlink TPC command and sending the downlink TPC command to the power control adjusting amount calculating device;
a power control adjustment calculation device for receiving the downlink TPC command and calculating the power adjustment PTPC(k) Sending to a base station transmitter;
the base station transmitter is used for performing spread spectrum, modulation and channel coding on various downlink signaling, information and user data sent to the UE, converting the modulated baseband signal into a radio frequency signal, and transmitting the radio frequency signal to the corresponding received UE at a certain power.
As shown in fig. 2, the power control adjustment amount calculation apparatus provided by the present invention includes: the device comprises a channel round-robin counter, a storage unit, a calculation unit, a step length calculation unit and an initial window length inner indication unit. In the following description, the window length value represents a parameter configured by the UTRAN with respect to the window length, and the power limit value represents a UTRAN configured power limit value.
The calculation unit is respectively connected with other four units, receives second calculation parameters, sends adjustment first intermediate values to the storage unit and receives adjustment second intermediate values fed back by the storage unit, and receives read/write addresses sent by the information round robin counter and delta sent by the step length calculation unitSTEPCalculating to obtain PTPC(k)。
The storage unit is connected with the channel round-robin counter and the calculating unit, receives the window length value and the read/write address sent by the channel round-robin counter, receives the first intermediate value of the adjustment sent by the calculating unit, and sends the second intermediate value of the adjustment to the calculating unit; the memory cell is operated for all P in the memory window lengthTPC(k) The value of (c).
A step length calculating unit connected with the calculating unit and receiving a first calculating parameter, wherein the first calculating parameter comprises a preset power control step length deltaTPCAnd a compression recovery period indication signal for sending the adjusted step size delta to the calculation unitSTEP(ii) a Because the finite power increase and the compression recovery period may exist simultaneously, the power control step value is not fixed, and the step length calculation unit is used for calculating to obtain the corresponding power control step length delta according to the compression recovery period indication signalSTEP。
The channel round robin counter is connected with the storage unit and the calculation unit, and sends read/write addresses required by the internal RAM to the storage unit and the calculation unit, wherein the read/write addresses are used for indicating channels corresponding to the internal memories of the storage unit and the calculation unit, and circularly counts according to the number of the channels, and the logical resource consumption of the storage unit and the calculation unit is reduced through the channel round robin counter in a time division multiplexing mode.
The initial window length indicating unit is connected with the calculating unit, receives the window length value and the limited power increase activation indicating signal and sends the initial window length indicating signal to the calculating unit; according to the above procedure, equation (1) is substituted for equation (2) for the adjustment of the just-activated window length value for the finite power increase minus 1 time slot (i.e., the initial window length). The initial window length indicating unit is used for judging whether the current time slot is in the initial window length or not, and the initial window length indicating signal has two states, wherein one state represents that the current time slot is in the initial window length, and the other state represents that the current time slot is not in the initial window length.
The step size calculation unit is implemented as shown in fig. 3, and includes a recovery period step size calculator 301 and a selector 302. The recovery period step calculator 301 is used for calculating the recovery period step value ΔRP-TPCThe reception values are 3dB and 2 Delta in this exampleTPCThe minimum value is selected from the two values and output to the selector 302; the selector 302 receives the compression recovery period indicator signal, and when the compression recovery period indicator signal indicates that the current time slot is in the compression recovery period, ΔSTEPSelect output ΔRP-TPCWhen the compression recovery period indicator signal indicates that the current slot is not in the compression recovery period, ΔSTEP＝ΔTPC. For convenience of expression, the fixed step size represents ΔTPCStep size represents ΔSTEP。
Referring to fig. 4, the memory cell includes a shifter 401, an adjustment memory 402, and a 1-out-of-60 multiplexer 403.
The memory cell is used for all P in the window length valueTPC(k) Considering that the value of p _ tpc is only-1, 0 or 1, only the most significant bit (i.e., the sign bit) and the current Δ of p _ tpc need to be storedSTEPThe value of (c). To save resources, ΔSTEPIs a 4-bit value, taking into account ΔSTEPIs a multiple of 2, willSTEPThe right shift process is performed by one bit, and thus the value to be stored in the window length adjustment amount memory 402 is 4 bits in total. The shifter 401 receives the adjusted first intermediate value,carrying out corresponding shift to obtain a 4-bit numerical value; meanwhile, all the adjustment amounts in the window length fed back by the adjustment amount memory 402 are received, the corresponding highest 4-bit value is not in the window length, and the new adjustment amount is formed by the 4-bit value which is shifted to the right and is newly generated and is sent to the adjustment amount memory 402. The adjustment amount memory 402 receives and stores the power adjustment amount within the window length transmitted from the shifter 401. The window length adjustment amount memory 402 has a width of 4 bits by 60, considering that the window length value specified by the upper layer is 60 at maximum. While the maximum value of the channel is 128, the depth of the window length adjustment memory 402 is at least 128, so that the capacity of 402 is at least 128 x 240 bits. The adjustment memory 402 also receives the read/write address sent by the channel round robin counter, and reads and writes the data of the corresponding channel in sequence. The 1-out-of-60 multiplexer 403 receives the 240-bit data read from the window length adjustment memory 402 and the window length value specified by the upper layer, selects a corresponding 4-bit value according to the window length value, and sends the selected value as the adjustment second intermediate value to the calculation unit.
The implementation of the initial window length indication unit is shown in fig. 5, and includes a starting intra-window length counter and a comparator. The start window length counter receives a limited power increase enable indication signal indicating that a limited power increase is enabled, starts counting from 1, increments by 1 every slot, and sends the count value to the comparator. The comparator receives the counting value and the window length value, compares the counting value and the window length value, and outputs an indication signal indicating that the current time slot is in the initial window length of the initial window length when the window length value is larger than the counting value, for example, the indication signal is represented by '1'; when the window length value is less than or equal to the count value, an indication signal indicating that the current slot is not within the initial window length of the initial window length is output, as indicated by "0". After the counter triggers counting within the initial window length, each time slot may be added with another fixed value, such as 2, except that the counter compares the count value with the window length value by a fixed value multiple. Since there are several dedicated physical channels in WCDMA, each channel needs one initial window length indication unit, and in order to save hardware resources, RAM can be used to replace register.
Computing unitIs a key component of the present invention, please refer to fig. 6, which includes a first intermediate value adjustment calculation module 61, an accumulated value in window length calculation module 62, a limited power increase TCP generation module 63 and PTPC(k) A calculation module 64.
The first adjustment intermediate value calculation module 61 receives a TCP command sent by the downlink TPC command extraction device and p _ TPC fed back by the limited power increase TCP generation module 63, calculates an adjustment first intermediate value and sends the adjustment first intermediate value to the window length inner accumulated value calculation module 62 and the storage unit;
the window length inner accumulated value calculation module 62 receives the adjustment first intermediate value sent by the adjustment first intermediate value calculation module 61 and the adjustment second intermediate value sent by the storage unit, and calculates to obtain deltasum(k) Send to limited power increase TCP generation module 63;
a limited power increase TCP generation module 63 for receiving the step size delta sent by the step size calculation unitSTEPΔ sent from the sum-in-window-length accumulation value calculation module 62sum(k) And the calculated P _ tpc is sent to the adjustment first intermediate value calculation module 61 and the PTPC(k) A calculation module 64;
PTPC(k) a calculation module 64 for receiving the p _ tpc sent by the limited power increase TCP generation module 63 and the step size delta sent by the step size calculation unitSTEPCalculating to obtain PTPC(k)。
As shown in the timing diagram of the limited power increase part of fig. 6, in the computing unit, besides the accumulated value memory 706 in the window length, other resources such as the comparator, the adder, and the selector can implement time division multiplexing on a plurality of physical dedicated channels in a channel round robin manner, and only one set of hardware resources is needed to meet the requirements of the plurality of channels, thereby greatly reducing the resource consumption.
Based on the power control adjustment calculating device of the present invention, the present invention also provides a WCDMA system, including a WCDMA inner loop power control system, where the WCDMA inner loop power control system includes a downlink TPC command extracting device and a power control adjustment calculating device, and includes:
a calculating unit, receiving the power control TPC command sent by the downlink TPC command extracting device, calculating to obtain and send a first intermediate value of adjustment;
the storage unit is used for receiving the first intermediate value of the adjustment and the window length value sent by the calculation unit, storing the first intermediate value of the adjustment, calculating according to the window length value to obtain a second intermediate value of the adjustment and sending the second intermediate value of the adjustment;
the step length calculating unit is connected with the calculating unit, receives a first calculating parameter, calculates the corresponding step length according to the calculating parameter and sends the corresponding step length to the calculating unit, wherein the first calculating parameter comprises a fixed step length and a compression recovery period indicating signal;
the calculating unit receives a second calculating parameter, the second intermediate value of the adjustment sent by the storing unit and the step length sent by the step length calculating unit, the second calculating parameter comprises the power control TPC command, a compression indication signal and a power increase limiting value, and the power control adjustment is calculated according to the second calculating parameter, the second intermediate value of the adjustment and the step length.
Claims (11)
1. A WCDMA inner loop power control system comprising a downlink power control TPC command extracting means and a power control adjustment calculating means, wherein said power control adjustment calculating means comprises:
the calculation unit is used for receiving the TPC command sent by the downlink TPC command extraction device, calculating to obtain and send a first intermediate value of adjustment;
the storage unit is used for receiving the first intermediate value of the adjustment and the window length value sent by the calculation unit, storing the first intermediate value of the adjustment, calculating according to the window length value to obtain a second intermediate value of the adjustment and sending the second intermediate value of the adjustment;
the step length calculating unit is connected with the calculating unit, receives a first calculating parameter, calculates the corresponding step length according to the first calculating parameter and sends the corresponding step length to the calculating unit, wherein the first calculating parameter comprises a fixed step length and a compression recovery period indicating signal;
the calculation unit receives a second calculation parameter, the adjusted second intermediate value sent by the storage unit, and the step length sent by the step length calculation unit, the second calculation parameter includes the TPC command, a compression indication signal, and a power increase limit value, and a power control adjustment amount is calculated according to the second calculation parameter, the adjusted second intermediate value, and the step length.
2. The WCDMA inner loop power control system as claimed in claim 1, wherein said power control adjustment amount calculating means further includes an initial window length indicating unit, said initial window length indicating unit receiving the window length value and the limited power increase activation indicating signal, determining whether the current slot is at the initial window length, and outputting a corresponding initial window length indicating signal to said calculating unit according to the determination result.
3. The WCDMA inner loop power control system of claim 1, wherein said calculating unit comprises:
a first intermediate value adjusting calculation module, configured to receive the TPC command sent by the downlink TPC extraction device, the step size sent by the step size calculation unit, and the compression indication signal, calculate to obtain a first intermediate value to be adjusted, and send the first intermediate value to be adjusted;
the window length inner accumulated value calculation module receives the second intermediate value of the adjustment sent by the storage unit and calculates to obtain the sum delta of the power control adjustment in the window lengthsum(k) And sending;
a limited power increase TPC generation module for receiving the delta sent by the accumulated value calculation module in the window lengthsum(k) Calculating the step length and the power increase limiting value sent by the step length calculating unit to obtain and send the limited power increase TPC;
and the power control adjustment quantity calculation module receives the limited power increase TPC sent by the limited power increase TPC generation module and the step length sent by the step length calculation unit, and multiplies the limited power increase TPC and the step length to obtain the power control adjustment quantity.
4. The WCDMA inner loop power control system as claimed in claim 1, 2 or 3, wherein said power control adjustment amount calculating means further comprises a channel round robin counter for sending a read address or/and a write address to said storage unit and calculating unit, said read address or/and write address indicating a channel corresponding to said storage unit and calculating unit internal memory.
5. A power control adjustment amount calculation apparatus, characterized by comprising:
the calculation unit receives the power control TPC command, calculates to obtain and sends an adjusted first intermediate value;
the storage unit is used for receiving the first intermediate value of the adjustment and the window length value sent by the calculation unit, storing the first intermediate value of the adjustment, calculating according to the window length value to obtain a second intermediate value of the adjustment and sending the second intermediate value of the adjustment;
the step length calculating unit is connected with the calculating unit, receives a first calculating parameter, calculates the corresponding step length according to the first calculating parameter and sends the corresponding step length to the calculating unit, wherein the first calculating parameter comprises a fixed step length and a compression recovery period indicating signal;
the calculation unit receives a second calculation parameter, the adjusted second intermediate value sent by the storage unit, and the step length sent by the step length calculation unit, the second calculation parameter includes the TPC command, a compression indication signal, and a power increase limit value, and a power control adjustment amount is calculated according to the second calculation parameter, the adjusted second intermediate value, and the step length.
6. The power control adjustment amount calculation apparatus according to claim 5, further comprising an initial window length indication unit that receives the window length value and the limited power increase activation indication signal, determines whether the current time slot is at an initial window length, and outputs a corresponding initial window length indication signal to the calculation unit according to a result of the determination.
7. The power control adjustment amount calculation apparatus according to claim 5, wherein the calculation unit includes:
a first intermediate value adjusting calculation module, configured to receive the TPC command sent by the downlink TPC extraction device, the step size sent by the step size calculation unit, and the compression indication signal, calculate to obtain a first intermediate value to be adjusted, and send the first intermediate value to be adjusted;
the window length inner accumulated value calculation module receives the second intermediate value of the adjustment sent by the storage unit and calculates to obtain the sum delta of the power control adjustment in the window lengthsum(k) And sending;
a limited power increase TPC generation module for receiving the delta sent by the accumulated value calculation module in the window lengthsum(k) Calculating the step length and the power increase limiting value sent by the step length calculating unit to obtain and send the limited power increase TPC;
and the power control adjustment quantity calculation module receives the limited power increase TPC sent by the limited power increase TPC generation module and the step length sent by the step length calculation unit, and multiplies the limited power increase TPC and the step length to obtain the power control adjustment quantity.
8. The power control adjustment amount calculation apparatus according to claim 5, wherein the step size calculation unit includes:
the recovery period step calculator is used for calculating and obtaining the recovery period step and sending the recovery period step;
and the first selector receives a fixed step value and the recovery period step length sent by the recovery period step length calculator, and selects to output the recovery period step length when the compressed recovery period indication signal indicates that the current recovery period is in the recovery period, otherwise selects to output the fixed step value.
9. The power control adjustment amount calculation apparatus according to claim 5, wherein the storage unit includes:
the shifter receives the first intermediate value of the adjustment sent by the calculation unit, shifts to obtain an effective part of the first intermediate value of the adjustment, and shifts to obtain an effective value in the window length and sends the effective value;
the adjustment memory is used for receiving the effective value in the window length sent by the shifter, storing the effective value and sending the effective value to the shifter for shifting;
and the multiplexer receives the effective value in the window length sent by the adjustment quantity memory, selects the corresponding effective value as an adjustment second intermediate value according to the window length value and sends the adjustment second intermediate value to the computing unit.
10. The power control adjustment amount calculation apparatus according to any one of claims 5 to 9, further comprising a channel round robin counter that transmits a read address or/and a write address to the storage unit and the calculation unit, the read address or/and the write address indicating a channel corresponding to the storage unit and the internal memory of the calculation unit.
11. A WCDMA system comprising a WCDMA inner loop power control system, said WCDMA inner loop power control system comprising a downlink TPC command extracting means and a power control adjustment calculating means, wherein said power control adjustment calculating means comprises:
a calculating unit, receiving the power control TPC command sent by the downlink TPC command extracting device, calculating to obtain and send a first intermediate value of adjustment;
the storage unit is used for receiving the first intermediate value of the adjustment and the window length value sent by the calculation unit, storing the first intermediate value of the adjustment, calculating according to the window length value to obtain a second intermediate value of the adjustment and sending the second intermediate value of the adjustment;
the step length calculating unit is connected with the calculating unit, receives a first calculating parameter, calculates the corresponding step length according to the calculating parameter and sends the corresponding step length to the calculating unit, wherein the first calculating parameter comprises a fixed step length and a compression recovery period indicating signal;
the calculation unit receives a second calculation parameter, the adjusted second intermediate value sent by the storage unit, and the step length sent by the step length calculation unit, the second calculation parameter includes the TPC command, a compression indication signal, and a power increase limit value, and a power control adjustment amount is calculated according to the second calculation parameter, the adjusted second intermediate value, and the step length.
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| CN200610034484A CN1859030B (en) | 2006-03-15 | 2006-03-15 | WCDMA internal loop power control system and calculating device for power control regulating content |
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| CN200610034484A CN1859030B (en) | 2006-03-15 | 2006-03-15 | WCDMA internal loop power control system and calculating device for power control regulating content |
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| CN1859030B CN1859030B (en) | 2010-05-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431352B (en) * | 2007-11-05 | 2013-04-24 | 联芯科技有限公司 | Multi-channel amplitude and gain adjustment method and device for time division synchronization code division multiple access system |
| CN107018561A (en) * | 2017-04-24 | 2017-08-04 | 深圳天珑无线科技有限公司 | A kind of inner-loop power control optimization method and device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6781973B1 (en) * | 2000-03-30 | 2004-08-24 | Matsushita Electric Industrial Co., Ltd. | Combined signaling and sir inner-loop power control |
| JP4048405B2 (en) * | 2000-12-05 | 2008-02-20 | 日本電気株式会社 | Transmission power control system and method, and CDMA mobile terminal |
| CN1223128C (en) * | 2002-06-15 | 2005-10-12 | 华为技术有限公司 | Self-adaptive power control method |
| ATE379883T1 (en) * | 2003-12-22 | 2007-12-15 | Alcatel Lucent | A METHOD FOR IMPROVING THE PERFORMANCE OF A MOBILE RADIO COMMUNICATIONS SYSTEM USING A POWER CONTROL ALGORITHM |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431352B (en) * | 2007-11-05 | 2013-04-24 | 联芯科技有限公司 | Multi-channel amplitude and gain adjustment method and device for time division synchronization code division multiple access system |
| CN107018561A (en) * | 2017-04-24 | 2017-08-04 | 深圳天珑无线科技有限公司 | A kind of inner-loop power control optimization method and device |
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| CN1859030B (en) | 2010-05-12 |
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