CN103299689B - For controlling method and the near end radio link node of power consumption near end radio link node - Google Patents
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Abstract
The method that the embodiments herein relates to being used for controlling the power consumption in radio link system (200,500) near end radio link node (201n, 501n).Near end radio link node (201n, 501n) is connected to Remote Radio link nodes (201f, 501f) via radio link (202).Near end radio link node (201n, 501n) obtains the granted rate of the business on the radio link (202) between near end radio link node (201n, 501n) and Remote Radio link nodes (201f, 501f).Near end radio link node (201n, 501n) obtains the requirement speed of the business between near end radio link node (201n, 501n) and Remote Radio link nodes (201f, 501f).Near end radio link node (201n, 501n) is based on granted rate and requires that speed controls the power consumption of radio link system (200,500).
Description
Technical field
The embodiments herein relate generally to the method near end radio link node, near end radio link node and
Radio link system.More specifically, the embodiments herein relates to controlling the power consumption in radio link system.
Background technology
Microwave radio links or radio link system are to use a branch of radio wave to transmit between the two positions
Signal or the communication system of data.Position can be with various distances apart.Figure 1 illustrates the double-direction radio current source of simplification
Road system 100.Radio link system 100 includes two radio link terminal/nodes 101, at the two radio link
Data transmission system is there is between terminal/node 101, such as, radio link/channel 102.Radio link 102 can wrap
Include one or more carrier wave.By the radio link node 101 shown on the left of Fig. 1 is used as reference point, can be by a left side
The radio link node 101 of side is referred to as near end radio link node 101n, and can be saved by the radio link on right side
Point 101 is referred to as Remote Radio link nodes 101f.Radio link system 100 includes four main ingredients: two
103, two receivers 105 of transmitter, transmission line 107, radio link/channel 102 and antenna 110.Antenna 110 can be installed
On such as base station towers.Transmitter 103 generates microwave signal, and uses input signal to be modulated microwave signal so that it
The significant information that reception and registration is to be transmitted.Each radio link node 101 includes that corresponding transmitter 103, near-end are launched
Machine 103n and distant transmitter 103f.Signal is transported to antenna 110, and connecing at link from transmitter 103 by transmission line 107
At receiving end, signal is transported to receiver 105 from antenna 110.Antenna 110 will be transmitted into from the microwave signal of transmission line 107
On radio link 102.At receiver website, signal energy collected by the antenna 110 pointing to cell site, and by signal energy
It is fed to process in transmission line 107 or by receiver 105.Receiver 105 extracts microwave signal, and is believed by this microwave
Number it is demodulated into its original form.Each radio link node 101 includes corresponding receiver 105, near-end receiver
105n and remote receiver 105f.
In certain embodiments, transmitter 103 and receiver 105 can merge into a unit, such as, transceiver.?
In other embodiments, transmitter 103 and receiver 105 can also merge into a list together with antenna 110 and transmission line 107
Unit.
Radio link system 100 can be according to duplex principle operation, it means that system 100 includes can be two sides
The radio link terminal 101 of the connection upwards communicated with one another, these radio link terminals 101 use two different frequencies
Send and receive signal.Therefore, in duplex system 100, radio link terminal 1 (such as, near end radio link terminal
101n) in frequency F1, information, and nothing will be sent to radio link terminal 2 (such as, Remote Radio link terminal 101f)
Line electricity link terminal 2 will send information to radio link terminal 1 in frequency F2.
The radio link system 100 used in telecommunication transmission systems generally already functions as the wired of sound circuit connection
Replace, thus with fixing speed operation, and generally radio link system 100 is defined as (dimensioned) and exists
Availability at this speed has the highest requirement.Up to date, speech business the most in the highest flight, but
Being in the past few years, Packet data service has been achieved with tremendous growth in a communication network.Microwave radio links system 100 is
Through accepting this challenge, it may be assumed that meet the growing demand to data service in several ways.
First, developing the method for connecting mapping data traffic at circuit, it is multiple that it is referred to as the Ethernet bearing time-division
With (EoTDM).This provides the interface for data service, such as, Ethernet interface.Radio link system 100 still with
Fixed rate works, and has at a fairly low utilization rate to radio channel.This is mainly due to for entering each branch road
Expense needed for row combination and layered reuse causes.The granularity that layered reuse provides also is a problem.
Next step is the transmission plan that exploitation circuit connects the optimization that can coexist with local packet data transmission.These are
It is referred to as hybrid system.The key property of these systems is: multiplexing is no longer layering, and can be that grouped data is arbitrarily divided
Wear width.This eliminates and granularity and combine a lot of problems that expense is relevant.The arbitrarily probability of distribution bandwidth also makes to utilize
The radio-frequency spectrum provided is easier to.
Arbitrarily bandwidth distribution additionally provides along with the bandwidth connected from circuit is reassigned to be grouped by the change required
The probability of data.In addition to Ethernet handoff functionality and service quality (QoS) priority partition functionality, it also achieves certainly
Adapt to modulation and adaptive coding (ACM) to improve the probability of spectrum utilization.ACM is for by changing code check and/or tune
Scheme processed automatically makes the method that bit rate adapts to current channel condition.The basic conception of these methods is by radio
Chain-circuit system 100 is defined as having higher availability at committed rate, and this committed rate is to be connected by circuit and/or be grouped
The part composition of data service.When external condition allows (such as, by the receiver bit error rate in receiver 105 or noise
Specify than (SNR)), handling capacity can be increased by reducing expense and/or the use higher order modulation schemes for Error Correction of Coding.
Along with Long Term Evolution (LTE) is as the appearance of a new generation's mobile system, the needs of the transmission that circuit connects will be subtracted
Few.Nearest radio link system 100 is designed to pure packet transmission.For these radio link systems 100, very
The support connecting circuit is still provided in the case of Duo, but circuit connects into for circuit in Ethernet packet network now
Simulation connects.Along with the transition to packet, network also will become more dense and handling capacity and function increases.
In order to support higher modulation scheme and higher output, have been developed at radio link system 100
The transmitter 103 of middle use and power amplifier are to reach more preferable efficiency.
It is for using remote receiver as detector to control transmitter that self adaptation transmitter power controls (ATPC)
The method of output.ATPC t carries out sending out for the mixing of pure packet and pure circuit are connected radio link system 100
Penetrate power management.Latest developments including the precorrection for radio amplifier do not only result in output reduction, also result in
The lower power consumption caused due to ATPC, this is still to have at system-level place owing to radio set can operate in classification AB simultaneously
Have fabulous linear.With use classes A, B, AB, C, D and E, radio amplifier can be classified.These classifications are based on logical
Cross conduction angle or the angle of flow of the input signal of this (or each) output amplifying device, in other words, input signal
The part that multiplying arrangement in cycle turns on during it.
Adaptive Modulation guarantees that the handling capacity of the radio link 102 that can use is maximized every time.Additionally, typically
In mobile packet network, the data volume of actual transmissions by day and generally changes factor 10 between evening.Business on ordinary days and week
There is also great changes between end.
This means if the evening the most only transmitting a small amount of Packet data service is in good condition, then radio link
System 100 will adapt to two-forty.That is, at most of time, idle traffic will only be transmitted.
In modern radio link system 100, the power section ground of dissipation proportional to speed and partly with
Output is proportional.For the constant SNR in receiver 105, required output and then there is exponential relationship with speed.
In addition, there is also static power dissipation.Equation 1 below shows the expression formula for this point.P0It it is static power
Dissipate, apAnd aeBeing a certain proportionality constant, B is for how the power dissipation in power amplifier (PA) scales along with speed
(scale) base index.
PD=Po+ap.r+ae.Br(equation 1)
In typical radio link system 100, between flank speed and minimum speed limit, proportional parts scaling maximum
The 50% of 10% and the exponential part scaling maximum power dissipation of power dissipation.If expressing speed r by bit/symbol,
Then B parameter can take the value between 1 and 2.B=1 corresponding to having the amplifier of constant power consumption about output.B=2
Corresponding to having the hypothesis amplifier of constant efficiency about output.The real radio frequency (RF) using linearization technique amplifies
Device somewhere (also referred to as classification AB) operation between classification A and classification B, and the somewhere between these limit.But
Even if B=1.1 (that is, the output of power amplifier (PA) reduces half and will make power consumption reduction 10%), PA power consumption will be with
Speed and significantly scale.
In multi-carrier systems, this is the most obvious；Some carrier waves in these carrier waves there may come a time when only to transmit idle industry
Business.Consider that such as there is the dual carrier system from 2 bit/symbol to the Adaptive Modulation of 10 bit/symbol.If ought actual gulp down
When the amount of telling is 10% (this runs corresponding with a carrier wave with its minimum speed limit), this system is run with its flank speed, then
It transmits idle pulley by consume its power up to 85%.
Power consumption is the significant contribution person of the possessory cost of transmission system.When network becomes more dense, power consumption will become
Obtain more important.Additionally, not only have impact on the operating costs (OPEX) of electric flux, also affect and be distributed with regulation power and have
The Capital expenditure (CAPEX) closed, such as, wiring, solaode, battery, electromotor etc..OPEX is for running holding of system
Continuous cost, and CAPEX is the cost of non-consumptive material part of exploitation or the system of offer.
By above-mentioned example, in the case of the 85% of power is used for running idle traffic and recognizing that evening is (i.e.,
The time of 1/3) in the case of the business of period is the 10% of the business on daytime, conclusion is that improper to employ current packet wireless
Up to the 30% of the power consumed in electricity chain-circuit system 100.
Discussed above concentrating on reduces the output of amplifier to reduce power consumption, this need the particular design of amplifier with
Characteristic.
Summary of the invention
Therefore, the purpose of the embodiments herein is to eliminate at least one in disadvantages mentioned above and at microwave radio links
System provides power consumption and the handling capacity of improvement.
According to first aspect, by being used for the power consumption controlling in radio link system near end radio link node
Method realize this purpose.Described near end radio link node is connected to Remote Radio link joint via radio link
Point.Described near end radio link node can obtain described near end radio link node and save with described Remote Radio link
The granted rate of the business on described radio link between point.Described near end radio link node obtain described near-end without
The requirement speed of the described business on described radio link between line current source circuit node and described Remote Radio link nodes
Rate.Described near end radio link node is based on described granted rate and described requires that speed controls described radio link system
The power consumption of system.
According to second aspect, by next for controlling the near end radio link node of the power consumption in radio link system
Realize this purpose.Described near end radio link node is connected to Remote Radio link nodes via radio link.Described
Near end radio link node includes obtaining unit, and described acquisition unit is configured to obtain described near end radio link node
And the granted rate of the business on the described radio link between described Remote Radio link nodes.Described acquisition unit quilt
Be further configured to obtain between described near end radio link node and described Remote Radio link nodes is described wireless
The requirement speed of the described business on current source road.Described near end radio link node includes control unit, described control unit
It is configured to based on described granted rate and the described power consumption requiring speed to control described radio link system.
Because exchanging total power dissipation for by signal to noise ratio, in microwave radio links system, therefore achieve the power consumption of improvement
And handling capacity.
The embodiments herein provides lot of advantages, and the non-exhaustive list for the example of these advantages is as follows:
In addition to the power consumption in radio link system, the embodiments herein additionally provides and reduces the excellent of output
Point.These embodiments meet the demand increasing data business day benefit in several ways.Other benefit is: along with subtracting of power consumption
Little, the possessory cost of cost of investment and radio link system all reduces.Additionally, when power consumption and therefore operation temperature subtract
Hour, time between failures will reduce.Additionally, the radio-frequency electromagnetic interference phenomenon of miscellaneous equipment experience and average output power will
Reduce.
The embodiments herein is not limited to feature and advantage mentioned above.After having read detailed description below, this
Skilled person is it will be recognized that extra feature and advantage.
Accompanying drawing explanation
The embodiments herein it is more fully described the most further now with reference to accompanying drawing, described attached
Illustrate these embodiments, and in the accompanying drawings:
Fig. 1 shows the schematic block diagram of the embodiment of radio link system.
Fig. 2 shows the schematic block diagram of the embodiment of single carrier radio link system.
Fig. 3 shows the flow chart that ACM processes the embodiment of block.
Fig. 4 shows the figure of power consumption.
Fig. 5 a and Fig. 5 b shows the block diagram of the embodiment of multi-carrier radio chain-circuit system.
Fig. 6 shows owing to requiring that the change of speed enables and disable the diagram of the embodiment of the condition of carrier wave.
Fig. 7 shows the diagram of the embodiment of the condition enabling and disabling carrier wave due to the change of admissible rate.
Fig. 8 is the flow chart of the embodiment depicting the method near end radio link node.
Fig. 9 shows the schematic block diagram of the embodiment of near end radio link node.
Accompanying drawing is not necessarily drawn to scale, and for the sake of clarity, can amplify the size of some feature, lay particular emphasis on explanation
The principle of the embodiments herein.
Detailed description of the invention
The embodiments herein relates to point-to-point duplex wireless current source road based on time-division (TD), frequency division (FD) or code division (CD)
System.
Illustrating, Fig. 2 shows single carrier duplex wireless electricity chain-circuit system 200.Time-division (TD), frequency division can be passed through
Or code division (CD) realizes duplex (FD).Radio link system 200 includes via data transmission system (such as, carrier duplex
Radio link/channel 202) near end radio link node 201n that connects and Remote Radio link nodes 201f.Near-end
Radio link node 201n includes near transmitter 203n and near-end receiver 205n.Remote Radio link nodes 201f bag
Include distant transmitter 203f and remote receiver 205f.Information signal is supplied to the business interface of such as near-end receiver 205n
207, and the far-end that information signal moves to the help of radio link 202 Remote Radio link nodes 201f connects
Receipts machine 205f.
Radio link system 200 can be symmetrical, and term near and far is used for selecting reference point with descriptive system
200。
Each radio link node 201 (such as, near end radio link node 201n and Remote Radio link joint
Point 201f) support following function:
√ is the instantaneous SNR of measuring receiver 205 during integration time, itself and the dynamic characteristic (example of radio channel 209
As, the rapidity of fading etc.) relevant.
√ automatically adapts to modulation scheme currently used for distant transmitter 203f and/or code rate, such as, physics mould
Formula (PHY).
√ especially, for multicarrier system: disable and enable transmitter 203 and receiver 205 individually.
√ measures (that is, estimate or know) instantaneous demand from the capacity of business interface 207 during integration time, its
With the dynamic characteristic of business interface 207 (i.e., it is desirable to service rate) relevant.
√, for each carrier wave, is individually controlled output or performs other parameter any needed for function.
√ controls modulation scheme and/or the code rate of transmitter 203, i.e. PHY.
√ is for carrying the SNR of measurement of each transmitter 203 (that whether enable or disabling) and state
Each carrier wave, provides backward channel by jumping.
Above transmitter 203 and receiver 205 mentioned the transmitting referring to that symmetrical radio link system is usually taken
Machine and receiver.
This speed is equivalent to the speed of the data signal measured in units of bits per second.
SNR is the signal to noise ratio receiving signal.
Multiplicative model above-mentioned (PHY) refers to the particular combination of the coding in ACM system and modulation.
Each radio link node 201 is according in the following manner execution control function:
1. use from the remote receiver SNR of backward channel, the current modulation scheme used by near transmitter 203n,
The service rate of the requirement of current output or other parameter and local measurement.
If the service rate that zero service rate required is supported higher than current PHY, then increase output or
Control other parameter, until far-end SNR allows to be switched to sufficiently high PHY.If impossible, then increase output or
Person controls other parameter to reach allowed maximum.Then, the highest PHY that SNR allows it is switched to.
If the service rate that zero service rate required is supported less than current PHY, then it is switched to the business speed required
The minimum PHY that rate allows.Then, reduce output or control other parameter, until far-end SNR mates current PHY being
Only.
If zero far-end SNR is the lowest for current PHY, then increases output or control other parameter, directly
To SNR the best.The limit that maximum power or other parameter if possible can not be used to be reached meets required
SNR, then be switched to the enough lower PHY of SNR.
If zero far-end SNR is higher than SNR required for current PHY, then reduces output or control other
Parameter, until SNR is the best.
The most in the case of multiple carrier systems, the service rate of the requirement of this locality/proximal measurement is used according in the following manner
State with distant transmitter 203f:
If zero service rate required allows, then disable near transmitter 203n completely for carrier wave.
If the service rate request that zero requires, then enable near transmitter 203n for carrier wave.
If zero backward channel instruction has disabled corresponding distant transmitter 203f, then disable near-end completely for carrier wave
Receiver 205n.
If zero backward channel indicates the most enabled corresponding distant transmitter 203f, then enable near-end for carrier wave and receive
Machine 205n.
This will cause the radio link system 200 optimizing power and handling capacity in the following manner:
1. in receiver 205, maintain the bit error rate (BER) specified.
2. require to provide enough handling capacities for current service rate.
3. minimize power consumption.
The bit error rate is such expection speed or measuring rate, i.e. at this speed, bit is wrong on the communication link
Translate.BER is defined as the bit that the is erroneously received share in the bit of all receptions.
The embodiments herein SNR exchanges total power dissipation for, and this can realize in the transmitter of such as amplifier etc..So
And, other the possible substitute for other parameter includes but not limited to such as:
● local oscillator, the phase noise of the power-> increase of reduction.
● low-noise amplifier (LNA), the power-> noise coefficient of reduction and linear deterioration.
The embodiments herein is also covered by these substitutes.
Speed adjusts
Return Fig. 2.Each radio link node 201 includes Business Processing block 210.Can by business interface 207
The customer service of variable Rate is connected to radio link system 200.Business Processing block 210 realizes speed adjustment function and speed is estimated
Meter function.
When the speed on business interface 207 is less than the speed provided on radio link 202, through-rate adjusts merit
Idle filling data can be inserted in a transmit direction and remove idle filling data in a receive direction.
If operational speed has exceeded the speed provided by radio link 202, then can be according to Business Processing block
210 protocol layers operated thereon are to use different embodiments.
When Business Processing 210 know type of service (such as, service type (CoS)) and include for type of service it
Between when carrying out one group of rule of priority division, qos feature can realize speed and adjust.That is, when delaying in Business Processing block 210
Deposit resource when being finished, abandon the business of lower priority.CoS is for carrying out the different types of business entering transmission system
Labelling is with the method carrying out priority division.
If Business Processing 210 does not knows business tine, then the flow control in downstream can realize speed adjustment.When caching money
When source begins to run out, Business Processing request sending entity is with lower speed operation.Such as, in Ethernet system, this is permissible
Ask by sending PAUSE (time-out).Transmitting element can be any equipment providing data to business interface 207,
Such as, Ethernet switch or router.
Rate estimates
The purpose of rate estimates function is the requirement speed (R calculating and going to ACM process block 213D).This is by by following
Parameter is as having inputted:
Granted rate (RG), it is the speed that radio link 202 currently runs.RGProcessed block 213 by ACM to provide.
Free rate (RI), it is that speed adjusts the function speed to data stream insertion idle data.As it has been described above, in industry
Business processes and realizes speed adjustment function in block 210.
Refusal speed (RR), it is the speed of unaccepted data.When speed adjusts functional realiey qos feature, permissible
Calculate refusal speed.Unaccepted data can be the data the most such as being divided by service type priority and being dropped
Or can be possible to receive on business interface 207 during flow control/back pressure (back pressure) stops and receives data
Data.When using flow control scheme, can be according to RR=(rP*RG)/(1-rP) calculate refusal speed, wherein, rPIt it is industry
Time-out ratio on business interface 207.If such as rP90%, then RRTo be RR=(0.9*RG)/(1-0.9)=9*RG。
In sum, may be calculated as requiring speed:
RD=RG+RR-RI(equation 2)
ACM processes block
ACM above-mentioned processes block 213 can perform multiple task.Flow chart in Fig. 3 shows and is processed block by ACM
The details of 213 functions performed.In the drawings, " output " infers other parameter any for realizing function.
√ it in remote receiver 205f, maintain the BER specified, and for current by monitoring far-end SNR
PHY the most upwardly or downwardly adjusts output or other parameter.
If √ is unsatisfactory for BER/SNR requirement when reaching the limit of peak power output or other parameter, then it by
Step is reduced to lower PHY.
The R that its calculating of √ is corresponding with current PHYG。
Its calculating of √ and current RDCorresponding PHY.If RDLess than RG, then it be gradually decreased to than with RDCorresponding
The higher leveled PHY of PHY, then for maintained appointment BER monitoring far-end SNR while, reduce output or
Control other parameter.
If √ is RDHigher than RG, then it is monitoring far-end SNR so that for than RDWhile higher leveled PHY is enough, increase
Output or control other parameter.When reaching this SNR, it incrementally increases this PHY.If it is enough detecting
Reach the limit of peak power or other parameter before SNR, then PHY is incrementally increased for possible the highest of this SNR
PHY。
Expand to multiple carrier wave
In multi-carrier systems, if need not the present combination capacity of the carrier wave of all activities, then near-end can be closed
Transmitter 203n and remote receiver 205f.Fig. 4 shows in the case of B=1, B=2 and B=1.3 as " preferable letter
Road " the example of power consumption of function of throughput rate.That is, in the case of peak power output, the highest PHY can be run.
In this example, for each carrier wave with reference to equation 1, static power dissipation P0 is 6W for each carrier wave, and from
Low rate zooms to 2W for each carrier wave from 0.4W to flank speed, linear segment, and when amplifier is the highest defeated at it
When going out the operation of power+30dBm place, the efficiency in amplifier is 9.1%.Power amplifier (PA) consumes at its peak power output
Dissipate 11W.Show two suite lines (each group has three curves).The group at top shows the situation of two carrier waves, its middling speed
Rate extends to 20 bit/symbol from 4 bit/symbol.The group of bottom shows 2 bits/symbol that a carrier wave can be used to realize
Number to 10 bit/symbol.Top curve in each group shows the situation of the pure PA with constant power dissipation, bottom
Curve has constant efficiency.Middle curve shows the reality being assumed the PA for the somewhere work in classification AB
The situation assumed.
Bottom curve in the example of Fig. 4 shows that, at 10 bit/symbol, the power consumption for a carrier wave is actually higher than
Power consumption for two carrier waves.By utilizing efficient PA and low total quiescent dissipation, realized additionally by one carrier wave of disabling
Power save become increasingly difficult to realize.Additionally, for all situations shown in figure and pure classification A PA advantageously, this is poor
It is seldom unique selection.
If being worth disabling/enabling, then must may according to circumstances analyze carrier wave.In the following, it is described that perform behaviour
Make necessary additional functionality.
Fig. 5 a and Fig. 5 b shows the embodiment of dual carrier radio link system 500.Fig. 5 a shows dual carrier system
500, it includes two radio link node, i.e. Remote Radio link nodes 501f and near end radio link node
501n.Fig. 5 b shows the embodiment of near end radio link 501n in dual carrier system 500.Remote Radio link nodes
501f is the reversion equivalent of near end radio link node 501n, and does not illustrates in single figure.Ability
Field technique personnel understanding is extended to any number of carrier wave, and for functionality described herein, extension is not
Important, and the quantity of the carrier wave controlled is not limited.
Compared with the single carrier duplex wireless electricity chain-circuit system 200 shown in Fig. 2, the extra control of dual carrier system 500
Function includes:
√ enables/disables control to each transmitter individually, and TX enables/disable 515.
√ enables/disables control to each receiver individually, and RX enables/disable 517.
√ for each carrier wave, transmits transmitter state (that is, opening or closing) on the backward channel of each carrier wave
Function, far-end TX enables/disables 519.Reason is when disabling carrier wave, may only use the carrier wave still operated to report to far-end
This point.
√ calculates admissible rate R for each carrier waveA520.If admissible rate is defined as current PA output work
Rate surplus makes SNR increase, then the speed that carrier wave is likely to be breached.
√ load distribution function 522, it uses admissible rate to calculate.
For simplicity, here without reference to Fig. 5 be again described with being included in dual carrier system 500, comprise equally
Element in single carrier duplex wireless electricity chain-circuit system 200.
Load distribution based on admissible rate
Assume to be distributed on multiple (N number of) carrier wave the existing load distribution function of incoming traffic, can define from merit
The most preferably additional functionality of the change of Spreading requirements speed between carrier wave from the perspective of consumption.
If RGIt is each R for each carrier waveGSum, equation 2 is the most effective.
Still at business interface 207, carry out speed adjustment, and RRAnd RIDefinition keep constant.
It is defined as according to relative admissible rate best mode of Spreading requirements speed between carrier wave:
Accordingly, the requirement speed for each carrier wave can be written as:
The linear increase of speed means that the index of power increases, i.e. be partial to have the carrier wave of relatively High Availabitity speed
Cost function will make power consumption minimize.
Disabling carrier wave
The method described in paragraph above makes all carrier waves be in identical speed surplus the most at last, and this is also from power
Intention from the perspective of dissipation and optimum.
When inferring the optimum criterion for disabling carrier wave, it is necessary to consider the dynamic behaviour of radio channel.Experience decline
Carrier wave will business " push " give other carrier wave, to maintain speed surplus.This will increase the output of other carrier wave.If
The carrier wave of disabling decline, the most also will give other carrier wave remaining service propelling.
Whether this causes power dissipation lower compared with waiting fading case recovery to depend on, and power dissipation is in static tribute
How to be distributed between offering and dynamically contributing.
It is concluded that should disable transport with flank speed when there is enough surpluses and doing so by foregoing
The carrier wave of row.This condition it is formulated in following equation 6:
In other words, when requiring that speed is less than all available speed (in addition to the carrier wave run with flank speed) sums
During plus a certain surplus, it is safe for disabling this carrier wave.
Such as by arranging RDAfter=0 disables a carrier wave, residue carrier wave can be repeated this process.
Enable carrier wave
When closing the Receiver And Transmitter for carrier wave, it is impossible to estimate channel condition, therefore for cut-off load
The R of rippleAIt is unknown.
Additionally, when requiring speed to add, a certain surplus, can more than during for the admissible rate sum of the carrier wave still operated
To set up for needing condition when enabling when carrier wave.
Can consider two embodiments of method:
First embodiment can be to enable all carrier waves when the condition met in equation 7.If hereafter admissible rate surpasses
When crossing the speed of the condition met in equation 6, again disable carrier wave.The rapid of the change requiring speed is rung by do so by providing
Should.
Second embodiment can assume that they will provide maximum admissible rate when the carrier wave of disabling is activated.In these feelings
Under condition, any carrier wave can be enabled.If not enough, then enable extra carrier wave according to identical rule, until in equation 7
Till condition is false or reaches the maximum number of carrier wave.
Fig. 6 shows for owing to requiring that the change of speed enables and disable the schematic diagram of the condition of carrier wave.Fig. 7 illustrates
When admissible rate exists the situation of change.
Now method as described above is described the angle of proximally radio link node 201n, 501n.Fig. 8 is
Describe near end radio link node 201n, 501n for controlling power consumption in radio link system 200,500
The flow chart of method.Near end radio link node 201n, 501n are connected to Remote Radio link via radio link 202
Node 201f, 501f.The method includes the step to perform near end radio link node 201n, 501n:
Step 801
Near end radio link node 201n, 501n obtain near end radio link node 201n, 501n is wireless with far-end
The granted rate of the business on radio link 202 between current source circuit node 201f, 501f.
Step 802
Near end radio link node 201n, 501n obtain near end radio link node 201n, 501n is wireless with far-end
The requirement speed of the business on radio link 202 between current source circuit node 201f, 501f.
Step 802a
In certain embodiments, this is the sub-step of step 802.
Near end radio link node 201n, 501n can obtain near end radio link node 201n, 501n and far-end
The free rate of the business on radio link 202 between radio link node 201f, 501f.
Step 802b
In certain embodiments, this is the sub-step of step 802, and is the step that will perform after step 802a.
Near end radio link node 201n, 501n can obtain near end radio link node 201n, 501n and far-end
The refusal speed of the business on radio link 202 between radio link node 201f, 501f.Require that speed can be based on
Granted rate, free rate and refusal speed.
Step 803
In certain embodiments, near end radio link node 201n, 501n based on the service rate required for wireless
The merit of the transmitter 203n of a change near end radio link node at least two radio carrier in current source road 202
Rate state.
Step 804
In certain embodiments, near end radio link node 201n, 501n identify sending out of Remote Radio link nodes
Penetrate the power rating of machine 203f.
Step 805
In certain embodiments, near end radio link node 201n, 501n are based on the Remote Radio link identified
The enabling of the transmitter 203f of node/disabled status is come at least two radio carrier in radio link 202
The power rating of one receiver 205n changing near end radio link node.
Step 806
In certain embodiments, near end radio link node 201n, 501n obtain and save at Remote Radio link
The signal to noise ratio of the business received at the receiver 205f of point.
Step 807
In certain embodiments, near end radio link node 201n, 501n control near end radio link node 201n,
The modulation of the business on radio link 202 between 501n and Remote Radio link nodes 201f, 501f and code rate.
In certain embodiments, based on signal to noise ratio, granted rate and require at least one in speed control modulation and
Code rate.
Step 808
Near end radio link node 201n, 501n are based on granted rate and require that speed controls radio link system
200, the power consumption of 500.
In certain embodiments, signal to noise ratio it is based further on to control power consumption.
In order to perform the method step for controlling the power consumption in radio link system 200,500 shown in Fig. 8, closely
End radio link node 201n, 501n include that near end radio link node as shown in Figure 9 is arranged.As it has been described above, warp
By radio link 202 near end radio link node 201n, 501n be connected to Remote Radio link nodes 201f,
501f。
Near end radio link node 201n, 501n include obtaining unit 901, it is thus achieved that unit 901 is configured to obtain closely
On end radio link node 201n, radio link 202 between 501n and Remote Radio link nodes 201f, 501f
The granted rate of business.Obtain unit 901 to be further configured to obtain near end radio link node 201n, 501n and far-end
The requirement speed of the business on radio link 202 between radio link node 201f, 501f.In certain embodiments,
Obtain unit 901 to be further configured to obtain near end radio link node 201n, 501n and Remote Radio link nodes
The free rate of the business on radio link 202 between 201f, 501f.In certain embodiments, it is thus achieved that unit 901 is entered
One step is configured to obtain near end radio link node 201n, between 501n and Remote Radio link nodes 201f, 501f
The refusal speed of the business on radio link 202.In certain embodiments, it is desirable to speed is based on granted rate, free rate
With refusal speed.In certain embodiments, it is thus achieved that unit 901 is further configured to obtain and saves at Remote Radio link
The signal to noise ratio of the business received at the receiver 205f of point.In certain embodiments, signal to noise ratio it is based further on to control power consumption.
In certain embodiments, near end radio link node 201n, 501n include changing unit 903, change unit 903
It is configured to based on the service rate required for a change at least two radio carrier in radio link 202
The power rating of the transmitter 203n of near end radio link node.In certain embodiments, change unit 903 to be joined further
It is set to the enabling of transmitter 203f based on the Remote Radio link nodes identified/disabled status come for radio link
The power shape of the receiver 205n of a change near end radio link node at least two radio carrier in 202
State.
In certain embodiments, near end radio link node 201n, 501n also include recognition unit 904, recognition unit
904 are configured to identify the power rating of the transmitter 203f of Remote Radio link nodes.
Near end radio link node 201n, 501n also include control unit 908, control unit 908 be configured to based on
Granted rate and require that speed is to control the power consumption of radio link system 200,500.
In certain embodiments, control unit 908 be further configured to control near end radio link node 201n,
The modulation of the business on radio link 202 between 501n and Remote Radio link nodes 201f, 501f and code rate.
In certain embodiments, based on signal to noise ratio, granted rate and require at least one in speed control modulation and code rate.
One or more processors (such as, near end radio link node 201n of description, 501n in Fig. 9 can be passed through
In processor 912) and realize for controlling nothing for the computer program code of the function that performs the embodiments herein
The mechanism of the power consumption in line electricity chain-circuit system 200,500.Processor can be such as digital signal processor (DSP), special collection
Become circuit (ASIC) processor, field programmable gate array (FPGA) processor or microprocessor.Can also be by mentioned above
Program code provides as the computer program such as with following form: carry for when being loaded into near-end radio
The data medium of the computer program code of this programme is performed time in link nodes 201n, 501n.One such carrier is permissible
Take the form of CD optical ROM.But, other data medium for such as memory stick etc is also feasible.Additionally, can
To be provided on the server as pure program code by computer program code, and remote download saves near end radio link
Point 201n, 501n.
The embodiments herein is not limited to preferred embodiment as described above.Can use various substitute, amendment and etc.
Valency thing.Therefore, should not be assumed that above-described embodiment limits the scope of the embodiments herein being defined by the following claims.
It is emphasized that when using term " to include/comprise " in the description, it is believed that this term specifies existence institute old
Feature, integer, step or the assembly stated, but do not preclude the presence or addition of one or more further feature, integer, step, group
Part or a combination thereof.Should also be noted that the word "a" or "an" before key element does not excludes the presence of multiple this kind of key element.
It should also be emphasized that the method in the case of without departing from the embodiments herein, defined in claims
Step can perform by another orders different from the order that they present in the claims.
Claims (16)
1. one kind is used for controlling in radio link system (200,500) near end radio link node (201n, 501n)
The method of power consumption, described near end radio link node (201n, 501n) via radio link (202) be connected to far-end without
Line current source circuit node (201f, 501f), described method includes:
Obtain (801) described near end radio link node (201n, 501n) with described Remote Radio link nodes (201f,
The granted rate of the business on described radio link (202) between 501f)；
Obtain (802) described near end radio link node (201n, 501n) with described Remote Radio link nodes (201f,
The requirement speed of the described business on described radio link (202) between 501f)；And
The requirement speed of granted rate based on described business and described business controls (808) described radio link system
The power consumption of (200,500),
Wherein, the power consumption controlling described radio link system includes:
Determine whether the requirement speed of described business is less than the granted rate of described business or determines the requirement speed of described business
Whether rate is more than the granted rate of described business；
In response to determining that the requirement speed of described business is less than the granted rate of described business, reduce described near end radio link
The output of node；And
In response to determining that the requirement speed of described business is more than the granted rate of described business, increase described near end radio link
The output of node.
Method the most according to claim 1, wherein, it is thus achieved that require that speed also includes:
Obtain (802a) described near end radio link node (201n, 501n) with described Remote Radio link nodes (201f,
The free rate of the described business on described radio link (202) between 501f)；And
Obtain (802b) described near end radio link node (201n, 501n) with described Remote Radio link nodes (201f,
The refusal speed of the described business on described radio link (202) between 501f)；
And wherein, described require that speed is based on described granted rate, described free rate and described refusal speed.
Method the most according to claim 1, also includes:
Obtain the signal to noise ratio of the business that (806) receive at receiver (205f) place of Remote Radio link nodes.
Method the most according to claim 3, wherein, is based further on described signal to noise ratio to control power consumption.
Method the most according to claim 1, also includes:
Control (807) described near end radio link node (201n, 501n) with described Remote Radio link nodes (201f,
The modulation of the described business on described radio link (202) between 501f) and code rate.
Method the most according to claim 3, wherein, based on described signal to noise ratio, described granted rate with described require speed
In at least one control modulation and code rate.
Method the most according to claim 1, wherein, described method also includes:
Service rate based on described requirement, at least two radio carrier in described radio link (202)
The power rating of the transmitter (203n) of one change (803) near end radio link node.
Method the most according to claim 1, wherein, described method also includes:
Identify the power rating of the transmitter (203f) of (804) Remote Radio link nodes；And
Transmitter (203f) based on the described Remote Radio link nodes identified enable/disabled status, for described
Connecing of change (805) near end radio link node at least two radio carrier in radio link (202)
The power rating of receipts machine (205n).
9. the near end radio link node being used for controlling the power consumption in radio link system (200,500) (201n,
501n), described near end radio link node (201n, 501n) is connected to Remote Radio chain via radio link (202)
Circuit node (201f, 501f), described near end radio link node (201n, 501n) including:
Obtain unit (901), be configured to:
Obtain described near end radio link node (201n, 501n) and described Remote Radio link nodes (201f, 501f)
Between described radio link (202) on the granted rate of business；And
Obtain described near end radio link node (201n, 501n) and described Remote Radio link nodes (201f, 501f)
Between described radio link (202) on the requirement speed of described business；
And
Control unit (908), the requirement speed being configured to granted rate based on described business and described business controls institute
State the power consumption of radio link system (200,500),
Wherein, described control unit is configured to following operation to control the power consumption of described radio link system:
Determine whether the requirement speed of described business is less than the granted rate of described business or determines the requirement speed of described business
Whether rate is more than the granted rate of described business；
In response to determining that the requirement speed of described business is less than the granted rate of described business, reduce described near end radio link
The output of node；And
In response to determining that the requirement speed of described business is more than the granted rate of described business, increase described near end radio link
The output of node.
Near end radio link node the most according to claim 9 (201n, 501n), wherein, described acquisition unit
(901) it is further configured to:
Obtain described near end radio link node (201n, 501n) and described Remote Radio link nodes (201f, 501f)
Between described radio link (202) on the free rate of described business；And
Obtain described near end radio link node (201n, 501n) and described Remote Radio link nodes (201f, 501f)
Between described radio link (202) on the refusal speed of described business；
And wherein, described require that speed is based on described granted rate, described free rate and described refusal speed.
11. near end radio link node according to claim 9 (201n, 501n), wherein, described acquisition unit
(901) it is further configured to obtain the noise of the business received at receiver (205f) place of Remote Radio link nodes
Ratio.
12. near end radio link node according to claim 11 (201n, 501n), wherein, are based further on described
Signal to noise ratio controls power consumption.
13. near end radio link node according to claim 12 (201n, 501n), wherein, described control unit
(908) it is further configured to control described near end radio link node (201n, 501n) and described Remote Radio link
The modulation of the described business on described radio link (202) between node (201f, 501f) and code rate.
14. near end radio link node according to claim 13 (201n, 501n), wherein, based on described signal to noise ratio,
Described granted rate and at least one required in speed described control modulation and code rate.
15. near end radio link node according to claim 9 (201n, 501n), also include:
Change unit (903), be configured to service rate based on described requirement, in described radio link (202)
The power shape of the transmitter (203n) of change (803) near end radio link node at least two radio carrier
State.
16. near end radio link node according to claim 9 (201n, 501n), also include:
Recognition unit (904), is configured to identify the power rating of the transmitter (203f) of Remote Radio link nodes；And
Change unit (903), be configured to transmitter (203f) based on the described Remote Radio link nodes identified
Enable/disabled status, at least two radio carrier in described radio link (202) one change near-end without
The power rating of the receiver (205n) of line current source circuit node.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2010/070869 WO2012089252A1 (en) | 2010-12-29 | 2010-12-29 | Rate optimized power consumption in micro wave radio links |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103299689A CN103299689A (en) | 2013-09-11 |
| CN103299689B true CN103299689B (en) | 2016-11-30 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1723676A (en) * | 2002-12-10 | 2006-01-18 | 京瓷株式会社 | Communication system, radio communication terminal, and radio base station |
| CN101035175A (en) * | 2006-03-09 | 2007-09-12 | 华为技术有限公司 | Method and device for saving the power of the digital user line |
| EP2023558A1 (en) * | 2006-05-26 | 2009-02-11 | NEC Corporation | Wireless communication devce, wireless communication system and wireless communication method |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1723676A (en) * | 2002-12-10 | 2006-01-18 | 京瓷株式会社 | Communication system, radio communication terminal, and radio base station |
| CN101035175A (en) * | 2006-03-09 | 2007-09-12 | 华为技术有限公司 | Method and device for saving the power of the digital user line |
| EP2023558A1 (en) * | 2006-05-26 | 2009-02-11 | NEC Corporation | Wireless communication devce, wireless communication system and wireless communication method |
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