CN104081835A - Power control method for common E-DCH and base station - Google Patents
Power control method for common E-DCH and base station Download PDFInfo
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- CN104081835A CN104081835A CN201280002572.2A CN201280002572A CN104081835A CN 104081835 A CN104081835 A CN 104081835A CN 201280002572 A CN201280002572 A CN 201280002572A CN 104081835 A CN104081835 A CN 104081835A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
Abstract
The present invention relates to the field of communications. Provided are a power control method for a common E-DCH and a base station. The method comprises: a base station calculating a signal interference ratio (SIR) estimated value of a Common E-DCH in a current adjustment period; the base station acquiring an SIR target value of the Common E-DCH in the current adjustment period according to an SIR target value of the Common E-DCH in a previous adjustment period and a decoding performance index of the Common E-DCH in the current adjustment period; the base station comparing the SIR estimated value in the current adjustment period with the SIR target value in the current adjustment period, and setting an inner-loop power control command according to a comparison result; and the base station sending the inner-loop power control command to a user equipment (UE), to instruct the UE to adjust a transmit power. The present invention achieves long-time stability of the Common E-DCH, expands an applicable service range of the Common E-DCH, and reduces a bit error rate of the Common E-DCH, so that the Common E-DCH is more stable, accurate control of the transmit power of the UE is achieved, interference between users and increase of cell load are reduced, and QoS requirements of users of different types can be met; and the SIR target value for inner-loop power control of the Common E-DCH of the user can more accurately reflect the decoding performance of the channel.
Description
The present invention relates to Poewr control method and the base station of the communications field, more particularly to a kind of common E-DCH channel.
In WCDMA（Wideband Code Division Multiple
Access, WCDMA）In system, in order to improve the speed and quality of transmitting uplink data, UE is reduced（User Equipment, user equipment）In data transfer from CELL-FACH（
CELL-Forward Access Channel, cell forward access channel）To CELL-DCH（CELL-Dedicated
Channel, cell private channel）Migration probability, that is, reduce UE and use power, and increasing smart mobile phone new business demand is preferably supported, in 3GPP R8（3rd generation
Partnership project-Release-8, third generation partner program R8）In introduce CELL-FACH enhancing.E-RACH（Enhanced
Random Access
Channel, strengthens RACH）It is the enhancing for multi-upstream access under CELL-FACH enhancement modes, its basic idea is the original E-DCH for belonging to dedicated channel of a reserved part（Enhanced
Dedicated Channel, Enhanced-DedicatedChannel）Common signal channel as a cell substitutes former message channel, and these public E-DCH channels are referred to as Common
E-DCH（Common E-DCH channel）.E-RACH supports up CCCH（Common Control Channel, CCCH）/DCCH（Dedicated
Control Channel, DCCH）/DTCH（Dedicated Transport
Channel, dedicated transmission channel）, it is transmitted using E-DCH channels.E-DCH channels overcome RACH（Random Access
Channel, RACH）Message channel existence time under access module is short, the low shortcoming of transmission rate, higher transmitting uplink data speed and the longer data transmission period once accessed can be supported, so that user is issued to the data transmission quality as CELL-DCH states in CELL-FACH states.
WCDMA system is used as a kind of self-interference system, it is necessary to realize strict Power Control, and otherwise system can not stable operation.WCDMA system only does inner-loop power control to uplink common channel, and inner-loop power control refers to NodeB（WCDAM base stations）The SIR of the dedicated channel calculated according to each time slot（Signal
Interference Ratio, signal interference ratio）Estimate, and obtained real-time SIR estimation value and RNC will be calculated（Radio Network
Controller, radio network controller）The sir target value issued is compared, and rapidly determines that UE is lifting transmission power or declines transmission power according to comparative result.
Common under E-RACH patterns
E-DCH channels, logically for be still a kind of common signal channel, setting up in mode, Common
E-DCH channels, as a kind of common signal channel, are to be set up by NodeB according to the driving of the access information of user, and special E-DCH channels are to be started to set up and perform deletion by RNC.Therefore RNC does not know the Common in cell
The information of E-DCH channel presence or absence, based on this, in power control, existing technical scheme and 3GPP agreements still continue to use the conventional power control scheme to common signal channel to Common E-DCH channels, i.e., only to Common
E-DCH channels do inner-loop power control.Its way is：By RNC to all Common in the cell when cell configuration
E-DCH channels one fixed initial SIR target value of unified configuration.NODEB is according to Common
The real-time sir value and the initial SIR target value of E-DCH channels compare, and rapidly determine that UE is lifting transmission power or declines transmission power.In Common
In the whole cycle that E-DCH is present, sir target value does not adjust.
Therefore the Poewr control method of the Common E-DCH channels of prior art has the following disadvantages：
1) Common of inner-loop power control function is only had
E-DCH channels are only suitable for that channel existence time is shorter, such as the situation of several ms, advantages of the Common E-DCH with respect to message channel can not be embodied so, and also limit Common
The business scope of application of E-DCH channels.
2) for Common
The time that E-DCH channels are present can be with long scene, channel circumstance may be changed at random, and user is also possible among movement, and influence is changed for the channel circumstance of these slow fadings, if only making inner-loop power control does not adjust sir target value, it is possible to cause Common
The E-DCH bit error rates are high, and probability channel step-out is likely to result in when serious.
3) different UE is in Common
The data rate transmitted on E-DCH channels may be different, therefore the unified sir target value of setting, is unfavorable for the accurate control of UE transmission powers.
4)
Unified static sir target value is set, then initial SIR target value also is difficult to determine, if because initial SIR target value sets too low, channel potentially unstable；If too high, the power transmission data necessary to user is able to be more than that initial SIR target value is set, cause user's interference in cell excessive.
5)
The demodulation decoding performance of channel can not can not actually be reflected by comparing sir value.For example, if channel circumstance is severe, sir value is high not necessarily to ensure that the bit error rate of channel is just low.The inner-loop power control of WCDMA system keeps certain signal interference ratio when being the power arrival receiving terminal for making transmission signal.However, under different multi-path environments, even if average signal interference ratio is maintained on certain thresholding, also differing and surely meeting the requirement of communication quality（BER（Bit
Error Ratio, bit error rate）Or BLER（Block Error Ratio, bLock error rate）, HARQ（Hybrid Autonomous
Request, mixed self-adapting is retransmitted）Retransmission rate etc.）.Due to the complexity of wireless channel, Power Control is carried out according only to sir value, link-quality, such as stationary user, low speed user and highspeed user can not be really reacted, ensureing identical QoS（
Quality of Service, service quality）Under, the requirement to SIR is different.
The embodiments of the invention provide a kind of Poewr control method of common E-DCH channel, it is intended to which solve prior art presence limits Common
The business scope of application of E-DCH channels, it is possible to cause Common
The E-DCH bit error rates are high, and probability channel step-out is likely to result in when serious, is unfavorable for the accurate control of UE transmission powers, it is difficult to determine initial SIR target value, and the problem of can not actually reflect the demodulation decoding performance of channel.
On the one hand there is provided a kind of Poewr control method of common E-DCH channel, methods described includes：
Base station calculates the signal interference ratio SIR estimation value in the current adjustment cycle of Common E-DCH channels；
The base station is according to the sir target value and the Common in the previous adjustment cycle of the Common E-DCH channels
The decoding performance index in the current adjustment cycle of E-DCH channels, obtains the sir target value in the current adjustment cycle of the Common E-DCH channels；
The SIR estimation value in the current adjustment cycle and the sir target value in the current adjustment cycle are compared by the base station, and set inner-loop power control order according to comparative result;
The inner-loop power control order is sent to user equipment (UE) by the base station, to indicate the UE adjustment transmission power.
The decoding performance index is HARQ retransmission rates；The base station is according to the Common
The sir target value in the previous adjustment cycle of E-DCH channels and the decoding performance index in the current adjustment cycle of the Common E-DCH channels, obtain the Common
The sir target value in the current adjustment cycle of E-DCH channels includes：
In the current adjustment cycle, the Common is counted
The HARQ retransmission rates of E-DCH channels, obtain the HARQ retransmission rates sum；
When the HARQ retransmission rates sum>
During target HARQ retransmission rate, the sir target value in the current adjustment cycle is obtained by adjusting upward the sir target value in the previous adjustment cycle；Or, when the HARQ retransmission rates sum<=
During target HARQ retransmission rate, the sir target value in the current adjustment cycle is obtained by adjusting the sir target value in the previous adjustment cycle downwards.
The sir target value that the sir target value by adjusting upward the previous adjustment cycle obtains current adjustment cycle is specially：
The sir target value in the sir target value in the current adjustment cycle=previous adjustment cycle+
The step value that SIR is adjusted upward；
If the sir target value for calculating the obtained current adjustment cycle is more than default sir target value higher limit, the sir target value in the current adjustment cycle is adjusted to default sir target value higher limit.
The sir target value that the sir target value by adjusting the previous adjustment cycle downwards obtains current adjustment cycle is specially：
The sir target value in the sir target value in the current adjustment cycle=previous adjustment cycle-
The step value that SIR is adjusted downwards；
If the sir target value for calculating the obtained current adjustment cycle is less than default sir target value lower limit, the sir target value in the current adjustment cycle is adjusted to default sir target value lower limit.
On the other hand there is provided a kind of base station, the base station includes：
First computing module, for calculating public Enhanced-DedicatedChannel Common
The signal interference ratio SIR estimation value in the current adjustment cycle of E-DCH channels；
Second computing module, for Common described in root
E-DCH channels according to the previous adjustment cycle sir target value and the Common E-DCH channels the current adjustment cycle decoding performance index, obtain the Common
The sir target value in the current adjustment cycle of E-DCH channels；
Comparison module, for the SIR estimation value in the current adjustment cycle and the sir target value in the current adjustment cycle to be compared；
Setup module, for setting inner-loop power control order according to comparative result；
Sending module, for the inner-loop power control order to be sent into user equipment (UE), to indicate the UE adjustment transmission power.
The decoding performance index is HARQ retransmission rates；Second computing module is specifically included：
Statistical module, in the current adjustment cycle, counting the Common
The HARQ retransmission rates of E-DCH channels, obtain the HARQ retransmission rates sum；
Adjusting module, for when the HARQ retransmission rates sum>
During target HARQ retransmission rate, the sir target value in the current adjustment cycle is obtained by adjusting upward the sir target value in the previous adjustment cycle；Or, when the HARQ retransmission rates sum<=
During target HARQ retransmission rate, the sir target value in the current adjustment cycle is obtained by adjusting the sir target value in the previous adjustment cycle downwards.
The sir target value that the sir target value by adjusting upward the previous adjustment cycle obtains current adjustment cycle is specially：
The sir target value in the sir target value in the current adjustment cycle=previous adjustment cycle+
The step value that SIR is adjusted upward；
If the sir target value for calculating the obtained current adjustment cycle is more than default sir target value higher limit, the sir target value in the current adjustment cycle is adjusted to default sir target value higher limit
。
The sir target value that the sir target value by adjusting the previous adjustment cycle downwards obtains current adjustment cycle is specially：
The sir target value in the sir target value in the current adjustment cycle=previous adjustment cycle-
The step value that SIR is adjusted downwards；
If the sir target value for calculating the obtained current adjustment cycle is less than default sir target value lower limit, the sir target value in the current adjustment cycle is adjusted to default sir target value lower limit.
Another further aspect includes there is provided a kind of base station, the base station：
Processor, for configuration processor；
Memory, for storage program；With
Transmitter, for inner-loop power control order to be sent into user equipment (UE), to indicate the UE adjustment transmission power；
When base station is run, the processor is used to perform the program stored in memory so that the base station performs following method：
Calculate public Enhanced-DedicatedChannel Common
The signal interference ratio SIR estimation value in the current adjustment cycle of E-DCH channels；According to the sir target value and the Common in the previous adjustment cycle of the Common E-DCH channels
The decoding performance index in the current adjustment cycle of E-DCH channels, obtains the sir target value in the current adjustment cycle of the Common E-DCH channels；
The SIR estimation value in the current adjustment cycle and the sir target value in the current adjustment cycle are compared, and the inner-loop power control order is set according to comparative result.
The decoding performance index is HARQ retransmission rates；It is described according to the Common
The sir target value in the previous adjustment cycle of E-DCH channels and the decoding performance index in the current adjustment cycle of the Common E-DCH channels, obtain the Common
The sir target value in the current adjustment cycle of E-DCH channels includes：
In the current SIR-target value adjustment cycle, the Common is counted
The HARQ retransmission rates of E-DCH channels, obtain the HARQ retransmission rates sum；
When the HARQ retransmission rates sum>
During target HARQ retransmission rate, the sir target value in the current adjustment cycle is obtained by adjusting upward the sir target value in the previous adjustment cycle；Or, when the HARQ retransmission rates sum<=
During target HARQ retransmission rate, the sir target value in the current adjustment cycle is obtained by adjusting the sir target value in the previous adjustment cycle downwards.
The sir target value that the sir target value by adjusting upward the previous adjustment cycle obtains current adjustment cycle is specially：
The sir target value in the sir target value in the current adjustment cycle=previous adjustment cycle+
The step value that SIR is adjusted upward；
If the sir target value for calculating the obtained current adjustment cycle is more than default sir target value higher limit, the sir target value in the current adjustment cycle is adjusted to default sir target value higher limit.
The sir target value that the sir target value by adjusting the previous adjustment cycle downwards obtains current adjustment cycle is specially：
The sir target value in the sir target value in the current adjustment cycle=previous adjustment cycle-
The step value that SIR is adjusted downwards；
If the sir target value for calculating the obtained current adjustment cycle is less than default sir target value lower limit, the sir target value in the current adjustment cycle is adjusted to default sir target value lower limit.
Due in embodiments of the present invention, base station is according to the sir target value and Common in previous adjustment cycle
The decoding performance index in the current adjustment cycle of E-DCH channels obtains the sir target value in the current adjustment cycle of Common E-DCH channels, therefore provided in an embodiment of the present invention public
The Poewr control method of E-DCH channels and base station have the advantages that：
（1）Common E-DCH channels can be made to keep stable for a long time, Common is expanded
E-DCH channels are applicable the scope of business；
（2）Due in Common
In E-DCH channel existence times, even if the channel circumstance of user is changed during this period, also Common adaptively can be dynamically adjusted according to the decoding performance index of Common E-DCH channels
The sir target value of E-DCH channels, so as to reduce the Common E-DCH bit error rates, makes Common E-DCH channels more stablize；
（3）Due to according to each Common
The decoding performance index of E-DCH channels and previous sir target value adjust the sir target value in cycle, are that each user sets accurate sir target value respectively, so as to be conducive to the accurate control of UE transmission powers, reduce inter-user interference and cell load lifting；
（4）Due to can more accurately reflect link-quality with HARQ retransmission rates, therefore the qos requirement of variety classes user, such as stationary user, low speed user and highspeed user can be met；
（5）So that user Common
The sir target value of E-DCH channel inner-loop power controls more accurately reflects the decoding performance of channel.
Fig. 1 is the flow chart of the Poewr control method for the Common E-DCH channels that the embodiment of the present invention one is provided.
Fig. 2 is the functional block diagram for the base station that the embodiment of the present invention two is provided.
Fig. 3 is the functional block diagram for the base station that the embodiment of the present invention three is provided.
Fig. 4 is that processor is used to perform the program stored in memory so that the flow chart for the method that base station is performed when base station is run.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with drawings and Examples, the present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Embodiment one：
Referring to Fig. 1, the Poewr control method for the Common E-DCH channels that the embodiment of the present invention one is provided comprises the following steps：
S101, base station calculate the SIR estimation value in the current adjustment cycle of Common E-DCH channels.
Wherein, the base station can be NodeB or other comprising Common
Base station in the network formats of E-DCH channels.
S102, base station are according to the sir target value and Common in the previous adjustment cycle of Common E-DCH channels
The decoding performance index in the current adjustment cycle of E-DCH channels, obtains the sir target value in the current adjustment cycle of Common E-DCH channels.
In the embodiment of the present invention one, base station calculates Common
The SIR estimation value in the current adjustment cycle of E-DCH channels is specially：Base station calculates the SIR estimation value in the current adjustment cycle of Common E-DCH channels in each time slot.
In the embodiment of the present invention one, the sir target value in previous adjustment cycle is the sir target value with the currently adjacent previous adjustment cycle in adjustment cycle.The sir target value in first sir target value adjustment cycle is initial sir target value, and initial sir target value is that Physical Shared Channel reconfigures signaling and is configured to base station from RNC when being set up by cell, or is set directly inside of base station.
In the embodiment of the present invention one, decoding performance index is HARQ retransmission rates, and base station is according to Common
The sir target value in the previous adjustment cycle of E-DCH channels and the decoding performance index in the current adjustment cycle of Common E-DCH channels, obtain Common
The sir target value in the current adjustment cycle of E-DCH channels includes：
In the current adjustment cycle, Common is counted
The HARQ retransmission rates of E-DCH channels, obtain the HARQ retransmission rates sum；
When HARQ retransmission rates sum in the adjustment cycle>
During target HARQ retransmission rate, the sir target value in current adjustment cycle is obtained by adjusting upward the sir target value in previous adjustment cycle, is specially：
The step value that the sir target value+SIR in the sir target value=previous adjustment cycle in current adjustment cycle is adjusted upward；
If the sir target value for calculating the obtained current adjustment cycle is more than default sir target value higher limit, the sir target value in current adjustment cycle is adjusted to default sir target value higher limit.
When HARQ retransmission rates sum in the adjustment cycle<=
During target HARQ retransmission rate, the sir target value in current adjustment cycle is obtained by adjusting the sir target value in previous adjustment cycle downwards, is specially：
The step value that the sir target value-SIR in the sir target value=previous adjustment cycle in current adjustment cycle is adjusted downwards；
If the sir target value for calculating the obtained current adjustment cycle is less than default sir target value lower limit, the sir target value in current adjustment cycle is adjusted to default sir target value lower limit.
S103, base station are by Common
The SIR estimation value in the current adjustment cycle of E-DCH channels and the sir target value in current adjustment cycle are compared, and set inner-loop power control order according to comparative result.
In the embodiment of the present invention one, if comparative result, which is SIR estimation value, is more than sir target value, base station is by inner-loop power control order TPC（Transmit Power
Control, transmit power control）" 0 " is set to, if comparative result, which is SIR estimation value, is less than or equal to sir target value, inner-loop power control order TPC is set to " 1 " by base station.
Inner-loop power control order is sent to UE by S104, base station, to indicate that UE adjusts transmission power.
In the embodiment of the present invention one, step S104 is specially：Base station passes through descending DPCCH（Dedicated Physical
Control Channel, Dedicated Physical Control Channel）Inner-loop power control order is sent to UE by channel, to indicate that UE is lifting transmission power or decline transmission power.
In the embodiment of the present invention one, if inner-loop power control order TPC is " 0 ", it indicates that UE declines transmission power, if inner-loop power control order TPC is " 1 ", it indicates that UE lifting transmission powers.
The embodiment of the present invention one is due to sir target value and Common of the base station according to the previous adjustment cycle
The decoding performance index in the current adjustment cycle of E-DCH channels, obtains the sir target value in the current adjustment cycle of Common E-DCH channels, therefore the Common provided using the embodiment of the present invention one
The Poewr control method of E-DCH channels has the advantages that：
（1）Common E-DCH channels can be made to keep stable for a long time, Common is expanded
E-DCH channels are applicable the scope of business；
（2）Due in Common
In E-DCH channel existence times, even if the channel circumstance of user is changed during this period, also Common adaptively can be dynamically adjusted according to the decoding performance index of Common E-DCH channels
The sir target value of E-DCH channels, so as to reduce the Common E-DCH bit error rates, makes Common E-DCH channels more stablize；
（3）Due to according to each Common
The decoding performance index of E-DCH channels and previous sir target value adjust the sir target value in cycle, are that each user sets accurate sir target value respectively, so as to be conducive to the accurate control of UE transmission powers, reduce inter-user interference and cell load lifting；
（4）Due to can more accurately reflect link-quality with HARQ retransmission rates, therefore the qos requirement of variety classes user, such as stationary user, low speed user and highspeed user can be met；
（5）So that user Common
The sir target value of E-DCH channel inner-loop power controls more accurately reflects the decoding performance of channel.
Embodiment two：
Referring to Fig. 2, the base station that the embodiment of the present invention two is provided includes：First computing module 11, the second computing module 12, comparison module 13, setup module 14 and sending module 15, it is specific as follows.
First computing module 11, the SIR estimation value in the current adjustment cycle for calculating Common E-DCH channels.
In the embodiment of the present invention two, the first computing module 11 in each time slot specifically for calculating Common
The SIR estimation value in the current adjustment cycle of E-DCH channels.
Second computing module 12, sir target value and Common for the previous adjustment cycle according to Common E-DCH channels
The decoding performance index in the current adjustment cycle of E-DCH channels, obtains the sir target value in the current adjustment cycle of Common E-DCH channels.
Wherein, the sir target value in previous adjustment cycle is the sir target value with the currently adjacent previous adjustment cycle in adjustment cycle.The sir target value in first sir target value adjustment cycle is initial sir target value, and initial sir target value is that Physical Shared Channel reconfigures signaling and is configured to base station from RNC when being set up by cell, or is set directly inside of base station.
Comparison module 13, the sir target value in the current adjustment cycle that the SIR estimation value in the current adjustment cycle for the first computing module 11 to be calculated is obtained with the second computing module 12 is compared.
Setup module 14, for setting inner-loop power control order according to the comparative result of comparison module 13.
Sending module 15, the inner-loop power control order for setup module 14 to be set is sent to UE, to indicate that UE adjusts transmission power.
In the embodiment of the present invention two, sending module 15 by inner-loop power control order by descending DPCCH channels specifically for being sent to UE, to indicate that UE is lifting transmission power or decline transmission power.If inner-loop power control order TPC is " 0 ", it indicates that UE declines transmission power, if inner-loop power control order TPC is " 1 ", it indicates that UE lifting transmission powers.
In the embodiment of the present invention two, decoding performance index is HARQ retransmission rates, and the second computing module 12 is specifically included：Statistical module 121 and adjusting module 122, wherein,
Statistical module 121, in the current adjustment cycle, counting Common
The HARQ retransmission rates of E-DCH channels, obtain the HARQ retransmission rates sum；
Adjusting module 122, the HARQ retransmission rate sums obtained for statistical module 121>
During target HARQ retransmission rate, the sir target value in current adjustment cycle is obtained by adjusting upward the sir target value in previous adjustment cycle；Or, the HARQ retransmission rate sums obtained when statistical module 121<=
During target HARQ retransmission rate, the sir target value in the current adjustment cycle is obtained by adjusting the sir target value in the previous adjustment cycle downwards.
Optionally, the adjusting module 122 specifically for：
The HARQ retransmission rate sums obtained when the statistical module 121>
During target HARQ retransmission rate, the step value that currently the sir target value+SIR in the sir target value=previous adjustment cycle in adjustment cycle is adjusted upward；
If the sir target value for calculating the obtained current adjustment cycle is more than default sir target value higher limit, the sir target value in current adjustment cycle is adjusted to default sir target value higher limit.
Optionally, the adjusting module 122 specifically for：
The HARQ retransmission rate sums obtained when the statistical module 121<=
During target HARQ retransmission rate, the step value that currently the sir target value-SIR in the sir target value=previous adjustment cycle in adjustment cycle is adjusted downwards；
If the sir target value for calculating the obtained current adjustment cycle is less than default sir target value lower limit, the sir target value in current adjustment cycle is adjusted to default sir target value lower limit.
Optionally, setup module 14 specifically for：
If comparative result, which is SIR estimation value, is more than sir target value, inner-loop power control order is set to " 0 ", if comparative result, which is SIR estimation value, is less than or equal to sir target value, inner-loop power control order TPC is set to " 1 ".
The embodiment of the present invention two is due to sir target value and Common of the base station according to the previous adjustment cycle
The decoding performance index in the current adjustment cycle of E-DCH channels, obtains Common
The sir target value in the current adjustment cycle of E-DCH channels, thus the embodiment of the present invention two provide base station have the advantages that：
（1）Common E-DCH channels can be made to keep stable for a long time, Common is expanded
E-DCH channels are applicable the scope of business；
（2）Due in Common
In E-DCH channel existence times, even if the channel circumstance of user is changed during this period, also Common adaptively can be dynamically adjusted according to the decoding performance index of Common E-DCH channels
The sir target value of E-DCH channels, so as to reduce the Common E-DCH bit error rates, makes Common E-DCH channels more stablize；
（3）Due to according to each Common
The decoding performance index of E-DCH channels and previous sir target value adjust the sir target value in cycle, are that each user sets accurate sir target value respectively, so as to be conducive to the accurate control of UE transmission powers, reduce inter-user interference and cell load lifting；
（4）Due to can more accurately reflect link-quality with HARQ retransmission rates, therefore the qos requirement of variety classes user, such as stationary user, low speed user and highspeed user can be met；
（5）So that user Common
The sir target value of E-DCH channel inner-loop power controls more accurately reflects the decoding performance of channel.
Embodiment three：
Referring to Fig. 3, the base station that the embodiment of the present invention three is provided includes：Processor 21, memory 22 and transmitter 23.Wherein,
Processor 21, for configuration processor.
In the embodiment of the present invention three, program can include program code, and described program code includes computer-managed instruction.
Processor 21 is probably central processor CPU, or specific integrated circuit ASIC（Application
Specific Integrated Circuit）, or it is arranged to implement one or more integrated circuits of the embodiment of the present invention.
Memory 22, for storage program.
Memory 22 may include high-speed RAM memory, it is also possible to also including nonvolatile memory（non-volatile
memory）.
Transmitter 23, for inner-loop power control order to be sent into UE, to indicate that UE adjusts transmission power.
In the embodiment of the present invention three, transmitter 23 by inner-loop power control order by descending DPCCH channels specifically for being sent to UE, to indicate that UE is lifting transmission power or decline transmission power.
In the embodiment of the present invention three, if inner-loop power control order TPC is " 0 ", it indicates that UE declines transmission power, if inner-loop power control order TPC is " 1 ", it indicates that UE lifting transmission powers.
Referring to Fig. 4, when base station is run, the processor 21 is used to perform the program stored in memory 22 so that the base station performs following method：
S201, the SIR estimation value in the current adjustment cycle of calculating Common E-DCH channels.
S202, sir target value and Common according to previous adjustment cycles of Common E-DCH channels
The decoding performance index in the current adjustment cycle of E-DCH channels, obtains the sir target value in the current adjustment cycle of Common E-DCH channels.
In the embodiment of the present invention three, Common is calculated
The SIR estimation value in the current adjustment cycle of E-DCH channels is specially：The SIR estimation value in the current adjustment cycle of Common E-DCH channels is calculated in each time slot；
In the embodiment of the present invention three, the sir target value in previous adjustment cycle is the sir target value with the currently adjacent previous adjustment cycle in adjustment cycle.The sir target value in first sir target value adjustment cycle is initial sir target value, and initial sir target value is that Physical Shared Channel reconfigures signaling and is configured to base station from RNC when being set up by cell, or is set directly inside of base station.
In the embodiment of the present invention three, decoding performance index is HARQ retransmission rates, according to Common
The sir target value in the previous adjustment cycle of E-DCH channels and the decoding performance index in the current adjustment cycle of Common E-DCH channels, obtain Common
The sir target value in the current adjustment cycle of E-DCH channels includes：
In the current adjustment cycle, Common is counted
The HARQ retransmission rates of E-DCH channels, obtain the HARQ retransmission rates sum；
When HARQ retransmission rates sum in the adjustment cycle>
During target HARQ retransmission rate, the sir target value in current adjustment cycle is obtained by adjusting upward the sir target value in previous adjustment cycle, is specially：
The step value that the sir target value+SIR in the sir target value=previous adjustment cycle in current adjustment cycle is adjusted upward；
If the sir target value for calculating the obtained current adjustment cycle is more than default sir target value higher limit, the sir target value in current adjustment cycle is adjusted to default sir target value higher limit.
When HARQ retransmission rates sum in the adjustment cycle<=
During target HARQ retransmission rate, the sir target value in current adjustment cycle is obtained by adjusting the sir target value in previous adjustment cycle downwards, is specially：
The step value that the sir target value-SIR in the sir target value=previous adjustment cycle in current adjustment cycle is adjusted downwards；
If the sir target value for calculating the obtained current adjustment cycle is less than default sir target value lower limit, the sir target value in current adjustment cycle is adjusted to default sir target value lower limit.
S203, SIR estimation value and Common by the current adjustment cycle of Common E-DCH channels
The sir target value in the current adjustment cycle of E-DCH channels is compared, and sets inner-loop power control order according to comparative result.
In the embodiment of the present invention three, step S203 is specially：If comparative result, which is SIR estimation value, is more than sir target value, by inner-loop power control order TPC（Transmit Power
Control, transmit power control）" 0 " is set to, if comparative result, which is SIR estimation value, is less than or equal to sir target value, inner-loop power control order TPC is set to " 1 ".
In said apparatus embodiment, included unit is simply divided according to function logic, but is not limited to above-mentioned division, as long as corresponding function can be realized；In addition, the specific name of each functional unit is also only to facilitate mutually distinguish, the protection domain being not intended to limit the invention.
It will be understood by those skilled in the art that in method provided in an embodiment of the present invention, its all or part of step can be by the related hardware of programmed instruction to complete.It can such as be completed by computer runs programs.The program can be stored in read/write memory medium, for example, random access memory, disk, CD etc..
Claims (18)
- A kind of Poewr control method of public Enhanced-DedicatedChannel Common E-DCH channels, it is characterised in that methods described includes：Base station calculates the signal interference ratio SIR estimation value in the current adjustment cycle of Common E-DCH channels；The base station is according to the sir target value and the Common in the previous adjustment cycle of the Common E-DCH channels The decoding performance index in the current adjustment cycle of E-DCH channels, obtains the sir target value in the current adjustment cycle of the Common E-DCH channels；The SIR estimation value in the current adjustment cycle and the sir target value in the current adjustment cycle are compared by the base station, and set inner-loop power control order according to comparative result;The inner-loop power control order is sent to user equipment (UE) by the base station, to indicate the UE adjustment transmission power.
- The method as described in claim 1, it is characterised in that the decoding performance index is that mixed self-adapting retransmits HARQ retransmission rates；The base station is according to the Common The sir target value in the previous adjustment cycle of E-DCH channels and the decoding performance index in the current adjustment cycle of the Common E-DCH channels, obtain the Common The sir target value in the current adjustment cycle of E-DCH channels includes：In the current adjustment cycle, the Common is counted The HARQ retransmission rates of E-DCH channels, obtain the HARQ retransmission rates sum；When the HARQ retransmission rates sum> During target HARQ retransmission rate, the sir target value in the current adjustment cycle is obtained by adjusting upward the sir target value in the previous adjustment cycle；Or,When the HARQ retransmission rates sum<= During target HARQ retransmission rate, the sir target value in the current adjustment cycle is obtained by adjusting the sir target value in the previous adjustment cycle downwards.
- Method as claimed in claim 2, it is characterised in that the sir target value that the sir target value by adjusting upward the previous adjustment cycle obtains the current adjustment cycle is specially：The step value that the sir target value+SIR in the sir target value in the current adjustment cycle=previous adjustment cycle is adjusted upward；If the sir target value for calculating the obtained current adjustment cycle is more than default sir target value higher limit, the sir target value in the current adjustment cycle is adjusted to default sir target value higher limit.
- Method as claimed in claim 2, it is characterised in that the sir target value that the sir target value by adjusting the previous adjustment cycle downwards obtains the current adjustment cycle is specially：The step value that the sir target value-SIR in the sir target value in the current adjustment cycle=previous adjustment cycle is adjusted downwards；If the sir target value for calculating the obtained current adjustment cycle is less than default sir target value lower limit, the sir target value in the current adjustment cycle is adjusted to default sir target value lower limit.
- Method according to claim any one of 1-4, it is characterised in that the sir target value in the previous adjustment cycle is the sir target value in the adjacent previous adjustment cycle with the current adjustment cycle.
- The method as described in claim 1, it is characterised in that the inner-loop power control order is sent to user equipment (UE) by the base station, be specially to indicate that the UE adjusts transmission power：The inner-loop power control order is sent to the UE by the base station by downlink Dedicated Physical control channel DPCCH channels, to indicate that the UE is lifting transmission power or decline transmission power.
- A kind of base station, it is characterised in that the base station includes：First computing module, for calculating public Enhanced-DedicatedChannel Common The signal interference ratio SIR estimation value in the current adjustment cycle of E-DCH channels；Second computing module, sir target value and the Common for the previous adjustment cycle according to the Common E-DCH channels The decoding performance index in the current adjustment cycle of E-DCH channels, obtains the sir target value in the current adjustment cycle of the Common E-DCH channels；Comparison module, the sir target value in the current adjustment cycle that the SIR estimation value in the current adjustment cycle for first computing module to be calculated is obtained with second computing module is compared；Setup module, for setting inner-loop power control order according to the comparative result of the comparison module；Sending module, the inner-loop power control order for the setup module to be set is sent to user equipment (UE), to indicate that the UE is adjustment transmission power.
- Base station as claimed in claim 7, it is characterised in that the decoding performance index is that mixed self-adapting retransmits HARQ retransmission rates；Second computing module includes：Statistical module, in the current adjustment cycle, counting the Common The HARQ retransmission rates of E-DCH channels, obtain the HARQ retransmission rates sum；Adjusting module, for the HARQ retransmission rate sums obtained when the statistical module> During target HARQ retransmission rate, the sir target value in the current adjustment cycle is obtained by adjusting upward the sir target value in the previous adjustment cycle；Or, the HARQ retransmission rate sums obtained when the statistical module<= During target HARQ retransmission rate, the sir target value in the current adjustment cycle is obtained by adjusting the sir target value in the previous adjustment cycle downwards.
- Base station as claimed in claim 8, it is characterised in that the adjusting module specifically for：The HARQ retransmission rate sums obtained when the statistical module>During target HARQ retransmission rate, the sir target value in the current adjustment cycle= The step value that the sir target value+SIR in the previous adjustment cycle is adjusted upward；If the sir target value for calculating the obtained current adjustment cycle is more than default sir target value higher limit, the sir target value in the current adjustment cycle is adjusted to default sir target value higher limit.
- Base station as claimed in claim 8, it is characterised in that the adjusting module specifically for：The HARQ retransmission rate sums obtained when the statistical module<During=target HARQ retransmission rate, the sir target value in the current adjustment cycle= The step value that the sir target value-SIR in the previous adjustment cycle is adjusted downwards；If the sir target value for calculating the obtained current adjustment cycle is less than default sir target value lower limit, the sir target value in the current adjustment cycle is adjusted to default sir target value lower limit.
- Base station as described in claim any one of 7-10, it is characterised in that the sir target value in the previous adjustment cycle is the sir target value in the adjacent previous adjustment cycle with the current adjustment cycle.
- Base station as claimed in claim 7, it is characterized in that, the sending module by the inner-loop power control order that the setup module is set by downlink Dedicated Physical control channel DPCCH channels specifically for being sent to the UE, to indicate that the UE is lifting transmission power or decline transmission power.
- A kind of base station, it is characterised in that the base station includes：Processor, for configuration processor；Memory, for storage program；WithTransmitter, for inner-loop power control order to be sent into user equipment (UE), to indicate the UE adjustment transmission power；When base station is run, the processor is used to perform the program stored in memory so that the base station performs following method：Calculate the signal interference ratio SIR estimation value in the current adjustment cycle of public Enhanced-DedicatedChannel Common E-DCH channels；According to the sir target value and the Common in the previous adjustment cycle of the Common E-DCH channels The decoding performance index in the current adjustment cycle of E-DCH channels, obtains the sir target value in the current adjustment cycle of the Common E-DCH channels；The SIR estimation value in the current adjustment cycle and the sir target value in the current adjustment cycle are compared, and the inner-loop power control order is set according to comparative result.
- Base station as claimed in claim 13, it is characterised in that the decoding performance index is that mixed self-adapting retransmits HARQ retransmission rates；It is described according to the Common The sir target value in the previous adjustment cycle of E-DCH channels and the decoding performance index in the current adjustment cycle of the Common E-DCH channels, obtain the Common The sir target value in the current adjustment cycle of E-DCH channels includes：In the current adjustment cycle, the Common is counted The HARQ retransmission rates of E-DCH channels, obtain the HARQ retransmission rates sum；When the HARQ retransmission rates sum> During target HARQ retransmission rate, the sir target value in the current adjustment cycle is obtained by adjusting upward the sir target value in the previous adjustment cycle；Or,When the HARQ retransmission rates sum<= During target HARQ retransmission rate, the sir target value in the current adjustment cycle is obtained by adjusting the sir target value in the previous adjustment cycle downwards.
- Base station as claimed in claim 14, it is characterised in that the sir target value that the sir target value by adjusting upward the previous adjustment cycle obtains the current adjustment cycle is specially：The step value that the sir target value+SIR in the sir target value in the current adjustment cycle=previous adjustment cycle is adjusted upward；If the sir target value for calculating the obtained current adjustment cycle is more than default sir target value higher limit, the sir target value in the current adjustment cycle is adjusted to default sir target value higher limit.
- Base station as claimed in claim 14, it is characterised in that the sir target value that the sir target value by adjusting the previous adjustment cycle downwards obtains the current adjustment cycle is specially：The step value that the sir target value-SIR in the sir target value in the current adjustment cycle=previous adjustment cycle is adjusted downwards；If the sir target value for calculating the obtained current adjustment cycle is less than default sir target value lower limit, the sir target value in the current adjustment cycle is adjusted to default sir target value lower limit.
- Base station as described in claim any one of 13-16, it is characterised in that the sir target value in the previous adjustment cycle is the sir target value in the adjacent previous adjustment cycle with the current adjustment cycle.
- Base station as claimed in claim 13, it is characterised in that the transmitter by the inner-loop power control order by downlink Dedicated Physical control channel DPCCH channels specifically for being sent to the UE, to indicate that the UE is lifting transmission power or decline transmission power.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2012/087504 WO2014100995A1 (en) | 2012-12-26 | 2012-12-26 | Power control method for common e-dch and base station |
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| CN104081835A true CN104081835A (en) | 2014-10-01 |
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| CN105657806A (en) * | 2014-12-04 | 2016-06-08 | 中兴通讯股份有限公司 | Uplink enhanced CELL_FACH (Forward Access Channel) power control method and base station |
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| CN101849426A (en) * | 2007-11-06 | 2010-09-29 | 艾利森电话股份有限公司 | Methods and arrangements in a wireless communication system |
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