CN103563458B - Uplink transmission open loop power control and device - Google Patents
Uplink transmission open loop power control and device Download PDFInfo
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- CN103563458B CN103563458B CN201280013155.8A CN201280013155A CN103563458B CN 103563458 B CN103563458 B CN 103563458B CN 201280013155 A CN201280013155 A CN 201280013155A CN 103563458 B CN103563458 B CN 103563458B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/06—TPC algorithms
- H04W52/10—Open loop power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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Abstract
A kind of uplink transmission open loop power control, including：Calculate the desired value of site STA transmission power；The transmission power of the STA is adjusted according to the desired value；Wherein, between the maximum transmission power of the basis STA, uplink transmission path loss, transmission bandwidth and basic effective bandwidth that Deictic Center access point CAP is uplink distribution the parameter of multiple proportion, the deviation adjusting of CAP, the deviation adjusting of STA and modulation coding mode are corresponding, carried out relative to receiving terminal noise and the minimum receiving power of interference.Invention additionally discloses a kind of uplink open-looped power control device.
Description
It it is on May 19th, 2011, Application No. 201110130194.3, entitled " one this application claims the applying date
The priority of the Chinese patent application of kind communication system ", the full content of the earlier application has embodied in this application.
It it is on 2 7th, 2012 this application claims the applying date, Application No. 201210026860.3 is entitled " up
The priority of the Chinese patent application of the method and device of access open Loop Power control ", the full content of the earlier application is
Embody in this application.
Technical field
The invention belongs to wireless communication field, more particularly to uplink transmission open loop power control and device.
Background technology
In recent years, wireless communication system is developed rapidly, such as wireless local area network technology WiFi, base based on 802.11 standards
Bluetooth (Bluetooth) system and the Femto towards indoor application that is derived by GSM in 802.15
Technology etc., is obtained for and is widely applied.
It is to use a kind of most wide wireless network transmission technology now based on 802.11 WiFi technology.Due to WiFi system
Employ carrier sense/conflict avoidance (CSMA/CA, Carrier Sense Multiple Access with Collision
Avoidance) mechanism, system effectiveness is relatively low, larger to waste of radio resources.The basic reason for causing this problem is CSMA/
CA mechanism is a kind of random multi-access channel mechanism based on competition, access point (AP, Access Point) and website (STA,
Station between), or between difference STA, the right to use of Radio Resource can be competed by CSMA/CA mechanism, while competing nothing
Line channel, now just collides, and causes the waste of Radio Resource.In order to avoid collision, CSMA/CA mechanism requirement AP or STA
Compete wireless channel when need random back, when all AP and STA keep out of the way, though wireless channel is available free, not by
Use, this is also the significant wastage to wireless channel.For these reasons, 802.11 system effectivenesies are relatively low.For example：802.11g
System physical layer peak rate is up to 54Mbps, but TCP layer achievable rate under big data bag downloading service is not higher than 30Mbps.
Although there is disadvantages mentioned above, 802.11 systems flexibly, are independent of centralized Control mechanism, therefore can also realize relatively low equipment
Cost.
Femto technologies based on 3GPP standards be from GSM evolution and come it is a kind of towards the new of in-door covering
Technology.Based on the data statistics to 3G systems, about 70% data service all occurs indoors, therefore indoor high-speed rate data
Access scheme is just particularly important.Femto base stations, referred to as femto base station, compact, deployment are flexible.Due to from mobile communication system
System evolution, Femto base stations almost inherit all features of GSM.Femto equipment is limited with reference to its
Coverage, the application scenarios feature such as less accessing user reduces equipment disposal ability, and then reduces equipment cost.
Consider that identical with GSM, Femto base stations can be divided into FDD (FDD, Frequency from duplex mode
Division Duplexing) and time division duplex (TDD, Time Division Duplexing) two classes duplex mechanism.On FDD
Descending carrier resource is symmetrical, and the asymmetrical service feature of data service up-downgoing data traffic causes that FDD system faces data
In the presence of certain wasting of resources during business.TDD system uplink downlink is operated on same carrier wave, is by dividing time resource
Uplink downlink distributes different Radio Resources, therefore can preferably be adapted to the asymmetrical number of up-downgoing business demand compared with FDD
According to business.However, the TDD duplex modes of GSM (including Femto systems), up-downgoing resource static allocation, face
The different Various types of data business of demand, for example：Browse webpage, mobile video, moving game etc., it is difficult to realize business demand with money
The dynamic adaptation that source divides.Compared with Wi-Fi, because Femto employs the centralized Control mechanism based on scheduling, base station or CAP
Do not exist and terminal or terminal between due to waste of radio resources caused by competition conflict and random back, therefore link efficiency
It is higher.
For the wireless communication system of TDD, for the consideration for overcoming the factors such as path loss, existing carries out uplink and opens
The demand of ring Power Control.
The content of the invention
In view of this, it is an object of the present invention to provide two kinds of uplink transmission open loop power controls.
It is a further object to provide two kinds of uplink open-looped power control devices.
In order to some aspects to the embodiment for disclosing have a basic understanding, simple summary is shown below is.Should
Summarized section is not extensive overview, nor to determine key/critical component or describe the protection domain of these embodiments.
Its sole purpose is that some concepts are presented with simple form, in this, as the preamble of following detailed description.
The technical scheme is that be achieved in that：
A kind of uplink transmission open loop power control, the method includes：
Calculate the desired value of site STA transmission power；
The transmission power of the STA is adjusted according to the desired value；
Wherein, the calculating is carried out based on equation below：
PSTA=min { PSTA_MAX,PLOL+C/N+10log10(BW)+offsetCAP+offsetSTA}；Wherein PSTA_MAXFor institute
State the maximum transmission power of STA, PLOLBe uplink transmission path loss, C/N be modulation coding mode it is corresponding, relative to reception
End noise and the minimum receiving power of interference, BW are the transmission bandwidth and base that Deictic Center access point CAP is uplink distribution
The parameter of the multiple proportion between this effective bandwidth, offsetCAPIt is the deviation adjusting of the CAP, offsetSTAIt is the STA
Deviation adjusting.
As optional implementation method, by parsing the message that the CAP is broadcasted, the deviation adjusting of the CAP is obtained.
As optional implementation method, do not receive what the CAP was properly received after the STA is in a uplink
During feedback, increase the value of the deviation adjusting of STA, the desired value for calculating the STA transmission powers next time；When described
When STA receives the feedback that the CAP is properly received after continuous setting time uplink, reduce the deviation adjusting of STA
Value, the desired value for calculating the STA transmission powers next time.
A kind of uplink transmission open loop power control, the method includes：
Calculate the desired value of site STA transmission power；
The transmission power of the STA is adjusted according to the desired value；
Wherein, the calculating is carried out based on equation below：
PSTA=min { PSTA_MAX,PLOL+C/N+10log10(BW)}；Wherein PSTA_MAXIt is the emission maximum work(of the STA
Rate, PLOLIt is uplink transmission path loss, C/N is corresponding, minimum relative to receiving terminal noise and interference modulation coding mode
Receiving power, BW is the ginseng of the multiple proportion between the transmission bandwidth and basic effective bandwidth for indicating CAP to be uplink distribution
Number.
In the above described two methods, as optional implementation method, according to the STA received signal powers and the CAP
Transmission power estimate uplink transmission path loss.
Optionally, by parsing the message that the CAP is broadcasted, the transmission power of the CAP is obtained.
In the above described two methods, as optional implementation method, by the control for parsing the physical frame that the CAP sends
Channel CCH, it is the transmission bandwidth of uplink distribution to obtain the CAP, and it is the biography of uplink distribution then to calculate the CAP
Multiple of the defeated bandwidth compared with basic effective bandwidth, as the instruction CAP be uplink distribute transmission bandwidth with it is basic
The parameter of the relation between effective bandwidth.
In the above described two methods, as optional implementation method, by parsing the CCH of the physical frame that the CAP sends,
Multiple of transmission bandwidths of the CAP for uplink distribution compared with basic effective bandwidth is obtained, is as the instruction CAP
The parameter of the relation between the transmission bandwidth and basic effective bandwidth of uplink distribution.
In the above described two methods, as optional implementation method, by parsing the CCH of the physical frame that the CAP sends,
Determine modulation coding mode, then by searching the mapping table of default modulation coding mode and minimum receiving power, really
The corresponding minimum receiving power of settled preceding modulation coding mode.
A kind of uplink open-looped power control device, the device includes：
First module, the desired value for calculating site STA transmission power；
Second unit, the transmission power for adjusting the STA according to the desired value；
Wherein, the calculating of the first module is carried out based on equation below：
PSTA=min { PSTA_MAX,PLOL+C/N+10log10(BW)+offsetCAP+offsetSTA}；Wherein PSTA_MAXFor institute
State the maximum transmission power of STA, PLOLBe uplink transmission path loss, C/N be modulation coding mode it is corresponding, relative to reception
End noise and the minimum receiving power of interference, BW are the transmission bandwidth and basic effective bandwidth for indicating CAP to be uplink distribution
Between multiple proportion parameter, offsetCAPIt is the deviation adjusting of the CAP, offsetSTAIt is the deviation adjusting of the STA.
Used as optional implementation method, the device also includes：Unit the 3rd, for by parsing disappearing for the CAP broadcast
Breath, obtains the deviation adjusting of the CAP.
Used as optional implementation method, the device also includes：Unit the 4th, for when the STA is in a uplink
When not receiving the feedback that the CAP is properly received afterwards, increase the value of the deviation adjusting of STA, it is described for calculating next time
The desired value of STA transmission powers；All receive what the CAP was properly received after the STA is in continuous setting time uplink
During feedback, reduce the value of the deviation adjusting of STA, the desired value for calculating the STA transmission powers next time.
A kind of uplink open-looped power control device, the device includes：
First module, the desired value for calculating site STA transmission power；
Second unit, the transmission power for adjusting the STA according to the desired value；
Wherein, the calculating of the first module is carried out based on equation below：
PSTA=min { PSTA_MAX,PLOL+C/N+10log10(BW)}；Wherein PSTA_MAXIt is the emission maximum work(of the STA
Rate, PLOLIt is uplink transmission path loss, C/N is corresponding, minimum relative to receiving terminal noise and interference modulation coding mode
Receiving power, BW is the ginseng of the multiple proportion between the transmission bandwidth and basic effective bandwidth for indicating CAP to be uplink distribution
Number.
In above two device, used as optional implementation method, the device also includes：Computing unit, for according to institute
State the transmission power estimation uplink transmission path loss of STA received signal powers and the CAP.
Optionally, the transmission power of the CAP is parsed in the message that the computing unit is broadcasted from CAP.
In above two device, used as optional implementation method, the device also includes：First determining unit, for leading to
The CCH for parsing the physical frame that the CAP sends is crossed, determines that the CAP is the transmission bandwidth of uplink distribution, calculate described
CAP is multiple of the transmission bandwidth of uplink distribution compared with basic effective bandwidth, is uplink as the instruction CAP
The parameter of the relation between the transmission bandwidth of distribution and basic effective bandwidth.
In above two device, used as optional implementation method, the device also includes：First determining unit, for leading to
Cross the CCH for parsing the physical frame that the CAP sends, obtain the CAP for uplink distribution transmission bandwidth with it is substantially effective
The multiple that bandwidth is compared, is the pass between the transmission bandwidth and basic effective bandwidth that uplink is distributed as the instruction CAP
The parameter of system.
In above two device, used as optional implementation method, the device also includes：Second determining unit, for leading to
Cross the CCH for parsing the physical frame that the CAP sends, determine modulation coding mode, by search default modulation coding mode with
The mapping table of minimum receiving power, determines the corresponding minimum receiving power of modulation coding mode.
For above-mentioned and related purpose, one or more embodiments include will be explained in below and in claim
In the feature that particularly points out.Following explanation and accompanying drawing describes some illustrative aspects in detail, and its indicate be only
Some modes in the utilizable various modes of principle of each embodiment.Other benefits and novel features will be under
The detailed description in face is considered in conjunction with the accompanying and becomes obvious, the disclosed embodiments be will include all these aspects and they
Be equal to.
Brief description of the drawings
Fig. 1 is the first uplink transmission open loop power control flow chart in the embodiment of the present invention；
Fig. 2 is the reference model of EUHT systems；
Fig. 3 is the access system composition of EUHT systems；
Fig. 4 is the process schematic for sending and receiving of protocol data between STA and CAP；
Fig. 5 is the structural representation of the first uplink open-looped power control device in the embodiment of the present invention；
Fig. 6 be the embodiment of the present invention optional embodiment in the first uplink open-looped power control device structure
Schematic diagram；
Fig. 7 be the embodiment of the present invention optional embodiment in second structure of uplink open-looped power control device
Schematic diagram.
Specific embodiment
The following description and drawings fully represent specific embodiments of the present invention, so that those skilled in the art's energy
Enough realize them.Other embodiments can include structure, logic, it is electric, process and it is other changes.Implement
Example only represents possible change.Unless explicitly requested, otherwise single component and function are optional, and the order for operating can
To change.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This
The scope of the embodiment of invention includes the gamut of claims, and all obtainable of claims is equal to
Thing.Herein, these embodiments of the invention can individually or generally be represented that this is only with term " invention "
For convenience, and if in fact disclosing the invention more than, it is not meant to automatically limit the scope of the application to appoint
What single invention or inventive concept.
Fig. 1 is the first uplink transmission open loop power control flow chart in the embodiment of the present invention, and the flow includes：
Step 11：Calculate the desired value of STA transmission powers.
Step 12：The transmission power of the STA is adjusted according to the desired value.
Wherein, the calculating in step 11 is carried out based on equation below：
PSTA=min { PSTA_MAX,PLOL+C/N+10log10(BW)+offsetCAP+offsetSTA}；Wherein PSTA_MAXFor institute
State the maximum transmission power of STA, PLOLBe uplink transmission path loss, C/N be modulation coding mode it is corresponding, relative to reception
End noise and the minimum receiving power of interference, BW are the transmission bandwidth and base that Deictic Center access point CAP is uplink distribution
The parameter of the multiple proportion between this effective bandwidth, offsetCAPIt is the deviation adjusting of the CAP, offsetSTAIt is the STA
Deviation adjusting.
Second uplink transmission open loop power control in the embodiment of the present invention, its flow and the step 11 shown in Fig. 1
~step 12 is similar, simply calculates the desired value of adjustment STA transmission powers using equation below in a step 11：
PSTA=min { PSTA_MAX,PLOL+C/N+10log10(BW)}；Wherein PSTA_MAXIt is the emission maximum work(of the STA
Rate, PLOLIt is uplink transmission path loss, C/N is corresponding, minimum relative to receiving terminal noise and interference modulation coding mode
Receiving power, BW is the ginseng of the multiple proportion between the transmission bandwidth and basic effective bandwidth for indicating CAP to be uplink distribution
Number, min refers to the minimum value of the maximum transmission power and Part II addition result for taking STA.The unit of the formula is dBm.
The optional embodiment of the embodiment of the present invention is given below, these implementation methods are with the enhanced superelevation of new definition
Fast WLAN (EUHT) system is application scenarios, but this application scenarios are only specific citing.
Fig. 2 is the reference model of EUHT systems, is primarily referred to as air interface reference model, including：Medium education
(MAC) layer and physics (PHY) layer, the major function of each layer are summarized as follows：
1. MAC layer includes adaptation sublayer and media access control sublayer.
Adaptation sublayer：Mapping between external network data and MAC layer service agreement unit (MSDU) is mainly provided and is turned
The function of changing.MSDU refers to the information paid as unit between MAC service accessing points (SAP).
Media access control sublayer：In addition to taking on medium education function, also including the management and control to system and to PHY
The support of the specific function of layer.
2. PHY layer：Main offer passes the PHY that mac-layer protocol data cell (MPDU) is mapped to corresponding physical channel
Defeated mechanism, such as OFDM (OFDM) and multiple-input, multiple-output (MIMO) technology.MPDU refers to profit between two peer MAC entities
Exchanged data cell is serviced with PHY layer.
Fig. 3 is constituted for the access system of EUHT systems, including central access point (CAP) and website (STA), and wherein STA can
Think various data equipments, for example：PDA, notebook, camera, video camera, mobile phone, panel computer, pad etc..As shown in figure 3,
STA1 and STA2 accesses CAP by air interface protocol, CAP by it is wired or wirelessly with existing external network (such as IP bones
Dry net, Ethernet) set up communication.The agreement composition of wherein CAP includes MAC layer and PHY layer.STA agreements composition includes application
(Application) layer, transmission control (TCP) layer, network (IP) layer, MAC layer and PHY layer.
Based on the agreement composition shown in Fig. 3, Fig. 4 gives the mistake for sending and receiving of protocol data between STA and CAP
Journey, for example：STA wants to send data to CAP, and STA is first by application data (such as VoIP, video) by application layer, TCP/IP
Layer is processed and packed, and IP adaptation sublayers are sent in the form of IP packets, is changed and is mapped by IP adaptation sublayers, is sent to
Media access control sublayer, media access control sublayer is operated by burst, encryption, framing, polymerization etc., issues PHY layer, is finally mapped to wireless communication by PHY
Carry out data transmission on road.
In the implementation method that the method below for the embodiment of the present invention is enumerated, by the execution master of open Loop Power control
Body is directly written as STA, and actually the executive agent can also be the independent community that homonymy is located at STA, or be integrated in STA
Internal entity.
Following optional implementation method is enumerated for second uplink Poewr control method in the embodiment of the present invention.With
Down in optional implementation method, STA when there is uplink demand, request CAP be this uplink allocation of transmission bandwidth and
It is determined that needing other parameters used in the formula of the desired value of calculating transmission power, calculated further according to computing formula and launched
The desired value of power, then according to the desired value adjustment transmission power for calculating.
In some optional implementation methods, according to the transmission power estimation uplink of STA received signal powers and CAP
Path loss, for example, in the case where uplink downlink is symmetrical, can be by current leading or data division the reception work(of measurement
Rate, and estimate downlink transmission path loss with reference to CAP transmission powers, then according to the reciprocity of uplink downlink, obtain up
Transmission path loss.
The transmitting work(of the CAP the to be used when message that STA can be broadcasted by CAP obtains estimating that uplink transmission path is lost
Rate.In EUHT systems, broadcast message frame (BCF) is a kind of frame of CAP broadcast, and CAP often detects periodic broadcast BCF, STA
To a BCF, it is possible to obtain the transmission power of CAP.There can be the CAP transmission power fields of 8 bits in the frame of BCF,
The current transmission power of CAP is indicated, the decimal number of field correspondence tape symbol is n, and (negative fraction is mending for n=-128~127
Code form is represented)：CAP transmission powers are ndBm.As can be seen that carrying CAP transmission powers in BCF, STA is receiving BCF
Afterwards, CAP transmission powers can therefrom be obtained.
In some optional implementation methods, STA can determine that it is what uplink was distributed to indicate CAP by two ways
The parameter of the multiple proportion between transmission bandwidth and basic effective bandwidth.
Mode one, STA first parses the control channel (CCH) of the physical frame of CAP transmissions, and current uplink is directed to obtain
Resource indicate, determine CAP for uplink distribution transmission bandwidth, then STA calculate CAP be uplink distribution transmission
Multiple of the bandwidth compared with basic effective bandwidth, obtains the parameter.It can be seen that, in mode one, STA is up CAP is obtained
After transmitting the transmission bandwidth of distribution, need to be by being calculated the parameter.
Mode two, STA by parse CAP send physical frame CCH, obtain CAP be uplink distribution transmission belt
Multiple compared with basic effective bandwidth wide, obtains the parameter.It can be seen that, in mode two, STA directly obtains the parameter.
In aforesaid way one and mode two, based on the difference of the predetermined basic effective bandwidth of system, the multiple may
It is integral multiple, it is also possible to fraction times.
In some optional implementation methods, STA obtains modulating-coding side by parsing the CCH of the physical frame that CAP sends
Formula is indicated, and to determine modulation coding mode, then according to pre-setting, modulation coding mode is corresponding with minimum receiving power to close
It is table, the corresponding minimum receiving power of current modulation coding mode is determined by way of tabling look-up.
In some optional implementation methods, if STA sides and CAP sides each have the droop adjusted value of regulation,
Then STA is when the desired value of adjustment transmission power is calculated, it may be considered that add the droop adjusted value of STA sides and CAP sides
In computing formula, will STA sides and CAP sides droop adjusted value and PLOL+C/N+10log10(BW) result of calculation phase
Plus.
For the first uplink Poewr control method in the embodiment of the present invention, in alternative embodiments, it is determined that
The transmission power of CAP, the loss of estimation uplink transmission path, the transmission bandwidth for determining to indicate CAP to be uplink distribution with it is basic
The parameter of the multiple proportion between effective bandwidth and the method for determining the corresponding minimum receiving power of modulation coding mode, it is and preceding
State identical in second optional embodiment of uplink Poewr control method.
Further, for the first uplink transmission open loop power control in the embodiment of the present invention, optionally implementing
In mode, message that STA need to be broadcasted by CAP, such as foregoing BCF frames determine the deviation adjusting of CAP in computing formula.
Further, for the first uplink transmission open loop power control in the embodiment of the present invention, optionally implementing
In mode, STA need to determine the deviation adjusting of STA in computing formula, for example, not receiving CAP after STA is in a uplink
During the feedback being properly received, then can increase the value of the deviation adjusting of STA, the target for calculating STA transmission powers next time
Used during value, when STA receives the feedback that CAP is properly received after continuous setting time uplink, then can reduce STA
Deviation adjusting value, used during for the desired value for calculating STA transmission powers next time.Above-mentioned setting time is more than or equal to 2
Integer.
Optionally, can be the deviation adjusting setting initial value of STA.When the value of deviation adjusting of STA is increased, working as
Increase the step value of setting on the basis of the deviation adjusting of preceding STA, when the value of deviation adjusting of STA is reduced, current STA's
Reduce the step value of setting on the basis of deviation adjusting.As a kind of optional implementation method, if STA is up in continuous setting time
The feedback that CAP is properly received is have received after transmission, but the deviation adjusting of current STA has been initial value, then no longer reduce
The value of the deviation adjusting of STA.
Fig. 5 is the structural representation of the first uplink open-looped power control device in the embodiment of the present invention, the device
Including：First module 51 and second unit 52.
First module 51, the desired value for calculating STA transmission powers.
Second unit 52, the transmission power for adjusting the STA according to the desired value.
Wherein, the calculating that first module 51 is performed is carried out based on equation below：
PSTA=min { PSTA_MAX,PLOL+C/N+10log10(BW)+offsetCAP+offsetSTA}；Wherein PSTA_MAXFor institute
State the maximum transmission power of STA, PLOLBe uplink transmission path loss, C/N be modulation coding mode it is corresponding, relative to reception
End noise and the minimum receiving power of interference, BW are the transmission bandwidth and basic effective bandwidth for indicating CAP to be uplink distribution
Between multiple proportion parameter, offsetCAPIt is the deviation adjusting of the CAP, offsetSTAIt is the deviation adjusting of the STA.
Second uplink open-looped power control device in the embodiment of the present invention, structure is same as shown in Figure 5, simply
First module 51 in the device calculates the desired value that site STA transmission power is adjusted by equation below：
PSTA=min { PSTA_MAX,PLOL+C/N+10log10(BW)}；Wherein PSTA_MAXIt is the emission maximum work(of affiliated STA
Rate, PLOLIt is uplink transmission path loss, C/N is corresponding, minimum relative to receiving terminal noise and interference modulation coding mode
Receiving power, BW is the ginseng of the multiple proportion between the transmission bandwidth and basic effective bandwidth for indicating CAP to be uplink distribution
Number.
Two kinds of optional embodiments of uplink open-looped power control device in the embodiment of the present invention are given below.
Fig. 6 is the structure of the first uplink open-looped power control device in the optional embodiment of the embodiment of the present invention
Schematic diagram, the device includes：First module 61, second unit 62, computing unit 63, the first determining unit 64, second determine single
First 65, the 3rd unit 66 and the 4th unit 67.
First module 61, the desired value for calculating STA transmission powers.The calculating that first module 61 is performed is based on following public
Formula is carried out：
PSTA=min { PSTA_MAX,PLOL+C/N+10log10(BW)+offsetCAP+offsetSTA}；Wherein PSTA_MAXFor institute
State the maximum transmission power of STA, PLOLBe uplink transmission path loss, C/N be modulation coding mode it is corresponding, relative to reception
End noise and the minimum receiving power of interference, BW are the transmission bandwidth and basic effective bandwidth for indicating CAP to be uplink distribution
Between multiple proportion parameter, offsetCAPIt is the deviation adjusting of the CAP, offsetSTAIt is the deviation adjusting of the STA.
Second unit 62, for the desired value drawn according to first module 61, adjusts the transmission power of STA.
Computing unit 63, the transmission power for parsing the CAP from the message that CAP is broadcasted, and received according to STA
The estimate of the transmission power estimation uplink transmission path loss of signal power and the CAP.
First determining unit 64 has two kinds of working methods.
Mode one, the first determining unit 64 determines that CAP is uplink point by parsing the CCH of the physical frame that CAP sends
The transmission bandwidth matched somebody with somebody, calculates multiple of transmission bandwidths of the CAP for uplink distribution compared with basic effective bandwidth, is indicated
CAP is the parameter of the relation between the transmission bandwidth and basic effective bandwidth of uplink distribution.
Mode two, the first determining unit 64 by parse CAP send physical frame CCH, obtain indicate CAP be up biography
Multiple of the transmission bandwidth of defeated distribution compared with basic effective bandwidth, obtains the transmission bandwidth for indicating CAP to be uplink distribution
With the parameter of the relation between basic effective bandwidth.
In aforesaid way one and mode two, based on the difference of the predetermined basic effective bandwidth of system, the multiple may
It is integral multiple, it is also possible to fraction times.
Second determining unit 65, for determining modulation coding mode by parsing the CCH of the physical frame that CAP sends, passes through
The mapping table of default modulation coding mode and minimum receiving power is searched, is determined that modulation coding mode is corresponding and minimum is connect
Receive power.
3rd unit 66, for by parsing the message that the CAP is broadcasted, obtaining the deviation adjusting of CAP.
4th unit 67, for when STA does not receive the feedback that CAP is properly received after a uplink, increasing
The deviation adjusting of STA, the desired value for calculating STA transmission powers next time, after STA is in continuous setting time uplink all
When receiving the feedback that CAP is properly received, reduce the value of the deviation adjusting of STA, for calculating STA transmission powers next time
Desired value.
Fig. 7 is second structure of uplink open-looped power control device in the optional embodiment of the embodiment of the present invention
Schematic diagram, the device includes：First module 71, second unit 72, computing unit 73, the first determining unit 74 and second determine list
Unit 75.
The function of second unit 72, computing unit 73, the first determining unit 74 and the second determining unit 75, respectively with Fig. 6
The function phase of shown second unit 62, computing unit 63, the first determining unit 64 and the second determining unit 65 is same, here not
Repeat again.
First module 71, the desired value for calculating STA transmission powers.The calculating that first module 71 is performed is based on following public
Formula is carried out：
PSTA=min { PSTA_MAX,PLOL+C/N+10log10(BW)}；Wherein PSTA_MAXIt is the emission maximum work(of the STA
Rate, PLOLIt is uplink transmission path loss, C/N is corresponding, minimum relative to receiving terminal noise and interference modulation coding mode
Receiving power, BW is the ginseng of the multiple proportion between the transmission bandwidth and basic effective bandwidth for indicating CAP to be uplink distribution
Number.
Uplink open-looped power control device provided in an embodiment of the present invention, may be located in STA, or with
The corpus separatum of STA homonymies.
It should be understood that the particular order or level the step of during disclosed are the examples of illustrative methods.Based on setting
Meter preference, it should be appreciated that during the step of particular order or level can be in the feelings of the protection domain for not departing from the disclosure
Rearranged under condition.Appended claim to a method gives the key element of various steps with exemplary order, and not
It is to be limited to described particular order or level.
In above-mentioned detailed description, various features are combined in single embodiment together, to simplify the disclosure.No
This open method should be construed to reflect such intention, i.e. the embodiment of theme required for protection needs clear
The more features of feature stated in each claim to Chu.Conversely, that reflected such as appending claims
Sample, the present invention is in the state fewer than whole features of disclosed single embodiment.Therefore, appending claims is special
This is expressly incorporated into detailed description, and wherein each claim is alone as the single preferred embodiment of the present invention.
Described above includes the citing of one or more embodiments.Certainly, in order to above-described embodiment is described and description portion
The all possible combination of part or method is impossible, but it will be appreciated by one of ordinary skill in the art that each is implemented
Example can do further combinations and permutations.Therefore, embodiment described herein is intended to fall into appended claims
Protection domain in all such changes, modifications and variations.Additionally, with regard to the term used in specification or claims
"comprising", the word cover mode similar to term " including ", solved as link word in the claims just as " including, "
As releasing.Additionally, the use of any one term "or" in the specification of claims being to represent " non-exclusionism
Or ".
Claims (18)
1. a kind of uplink transmission open loop power control, it is characterised in that the method includes：
Calculate the desired value of site STA transmission power；
The transmission power of the STA is adjusted according to the desired value；
Wherein, the calculating is carried out based on equation below：
PSTA=min { PSTA_MAX,PLOL+C/N+10log10(BW)+offsetCAP+offsetSTA}；Wherein PSTA_MAXIt is the STA
Maximum transmission power, PLOLBe uplink transmission path loss, C/N be modulation coding mode it is corresponding, relative to receiving terminal noise
With interference minimum receiving power, BW be Deictic Center access point CAP be uplink distribution transmission bandwidth with it is substantially effective
The parameter of the multiple proportion between bandwidth, offsetCAPIt is the deviation adjusting of the CAP, offsetSTAIt is the deviation of the STA
Adjustment.
2. the method for claim 1, it is characterised in that by parsing the message that the CAP is broadcasted, obtain the CAP
Deviation adjusting.
3. the method for claim 1, it is characterised in that do not received after the STA is in a uplink described
During the feedback that CAP is properly received, increase the value of the deviation adjusting of STA, the mesh for calculating the STA transmission powers next time
Scale value；
When the STA receives the feedback that the CAP is properly received after continuous setting time uplink, reduce STA's
The value of deviation adjusting, the desired value for calculating the STA transmission powers next time.
4. a kind of uplink transmission open loop power control, it is characterised in that the method includes：
Calculate the desired value of site STA transmission power；
The transmission power of the STA is adjusted according to the desired value；
Wherein, the calculating is carried out based on equation below：
PSTA=min { PSTA_MAX,PLOL+C/N+10log10(BW)}；Wherein PSTA_MAXIt is the maximum transmission power of the STA,
PLOLFor uplink transmission path is lost, C/N is that modulation coding mode is corresponding, is connect relative to receiving terminal noise and the minimum of interference
Power is received, BW is the parameter of the multiple proportion between the transmission bandwidth and basic effective bandwidth for indicating CAP to be uplink distribution.
5. the method as described in claim 1 or 4, it is characterised in that according to the STA received signal powers and the CAP
Transmission power estimates the uplink transmission path loss.
6. method as claimed in claim 5, it is characterised in that by parsing the message that the CAP is broadcasted, obtain the CAP
Transmission power.
7. the method as described in claim 1 or 4, it is characterised in that believed by the control for parsing the physical frame that the CAP sends
Road CCH, it is the transmission bandwidth of uplink distribution to obtain the CAP, and it is the transmission of uplink distribution then to calculate the CAP
Multiple of the bandwidth compared with basic effective bandwidth, as the instruction CAP be uplink distribute transmission bandwidth with have substantially
The parameter of the relation between effect bandwidth.
8. the method as described in claim 1 or 4, it is characterised in that by parsing the CCH of the physical frame that the CAP sends, obtain
Multiple of transmission bandwidths of the CAP for uplink distribution compared with basic effective bandwidth is taken, is upper as the instruction CAP
The parameter of the relation between the transmission bandwidth and basic effective bandwidth of row transmission distribution.
9. the method as described in claim 1 or 4, it is characterised in that by parsing the CCH of the physical frame that the CAP sends, really
Determine modulation coding mode, then by searching the mapping table of default modulation coding mode and minimum receiving power, it is determined that
The corresponding minimum receiving power of current modulation coding mode.
10. a kind of uplink open-looped power control device, it is characterised in that the device includes：
First module, the desired value for calculating site STA transmission power；
Second unit, the transmission power for adjusting the STA according to the desired value；
Wherein, the calculating of the first module is carried out based on equation below：
PSTA=min { PSTA_MAX,PLOL+C/N+10log10(BW)+offsetCAP+offsetSTA}；Wherein PSTA_MAXIt is the STA
Maximum transmission power, PLOLBe uplink transmission path loss, C/N be modulation coding mode it is corresponding, relative to receiving terminal noise
With the minimum receiving power of interference, BW is to indicate CAP between the transmission bandwidth and basic effective bandwidth of uplink distribution
The parameter of multiple proportion, offsetCAPIt is the deviation adjusting of the CAP, offsetSTAIt is the deviation adjusting of the STA.
11. devices as claimed in claim 10, it is characterised in that the device also includes：Unit the 3rd, for by parsing
The message of CAP broadcast is stated, the deviation adjusting of the CAP is obtained.
12. devices as claimed in claim 10, it is characterised in that the device also includes：Unit the 4th, for when STA is one
When the feedback that CAP is properly received is not received after secondary uplink, increase the deviation adjusting of STA, for calculating STA hairs next time
The desired value of power is penetrated, when STA receives the feedback that CAP is properly received after continuous setting time uplink, reduces STA
Deviation adjusting value, the desired value for calculating STA transmission powers next time.
13. a kind of uplink open-looped power control devices, it is characterised in that the device includes：
First module, the desired value for calculating site STA transmission power；
Second unit, the transmission power for adjusting the STA according to the desired value；
Wherein, the calculating of the first module is carried out based on equation below：
PSTA=min { PSTA_MAX,PLOL+C/N+10log10(BW)}；Wherein PSTA_MAXIt is the maximum transmission power of the STA,
PLOLFor uplink transmission path is lost, C/N is that modulation coding mode is corresponding, is connect relative to receiving terminal noise and the minimum of interference
Power is received, BW is the parameter of the multiple proportion between the transmission bandwidth and basic effective bandwidth for indicating CAP to be uplink distribution.
14. device as described in claim 10 or 13, it is characterised in that the device also includes：Computing unit, for according to institute
State the transmission power estimation uplink transmission path loss of STA received signal powers and the CAP.
15. devices as claimed in claim 14, it is characterised in that parsed in the message that the computing unit is broadcasted from CAP
The transmission power of the CAP.
16. device as described in claim 10 or 13, it is characterised in that the device also includes：First determining unit, for leading to
The CCH for parsing the physical frame that the CAP sends is crossed, determines that the CAP is the transmission bandwidth of uplink distribution, calculate described
CAP is multiple of the transmission bandwidth of uplink distribution compared with basic effective bandwidth, is uplink as the instruction CAP
The parameter of the relation between the transmission bandwidth of distribution and basic effective bandwidth.
17. device as described in claim 10 or 13, it is characterised in that the device also includes：First determining unit, for leading to
Cross the CCH for parsing the physical frame that the CAP sends, obtain the CAP for uplink distribution transmission bandwidth with it is substantially effective
The multiple that bandwidth is compared, is the pass between the transmission bandwidth and basic effective bandwidth that uplink is distributed as the instruction CAP
The parameter of system.
18. device as described in claim 10 or 13, it is characterised in that the device also includes：Second determining unit, for leading to
Cross the CCH for parsing the physical frame that the CAP sends, determine modulation coding mode, by search default modulation coding mode with
The mapping table of minimum receiving power, determines the corresponding minimum receiving power of modulation coding mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201280013155.8A CN103563458B (en) | 2011-05-19 | 2012-04-27 | Uplink transmission open loop power control and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101301943 | 2011-05-19 | ||
| CN201110130194.3 | 2011-05-19 | ||
| CN201110130194 | 2011-05-19 | ||
| CN2012100268603 | 2012-02-07 | ||
| CN201210026860 | 2012-02-07 | ||
| CN201210026860.3 | 2012-02-07 | ||
| CN201280013155.8A CN103563458B (en) | 2011-05-19 | 2012-04-27 | Uplink transmission open loop power control and device |
| PCT/CN2012/074831 WO2012155785A1 (en) | 2011-05-19 | 2012-04-27 | Method and apparatus for controlling uplink transmission open-loop power |
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| Publication Number | Publication Date |
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| CN103563458A CN103563458A (en) | 2014-02-05 |
| CN103563458B true CN103563458B (en) | 2017-06-16 |
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| CN201280013155.8A Active CN103563458B (en) | 2011-05-19 | 2012-04-27 | Uplink transmission open loop power control and device |
| CN2012101296969A Pending CN102883421A (en) | 2011-05-19 | 2012-04-27 | Uplink transmission open loop power control method and device |
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| CN110149691A (en) | 2013-08-13 | 2019-08-20 | 华为技术有限公司 | A kind of method and user equipment sending leader sequence |
| WO2016058155A1 (en) * | 2014-10-16 | 2016-04-21 | 华为技术有限公司 | Communication method for wireless local area network, station point and communication system |
| CN108260195B (en) * | 2016-12-28 | 2021-06-25 | 上海朗帛通信技术有限公司 | Method and device for adjusting transmission power in UE (user equipment) and base station |
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| CN1823480A (en) * | 2003-07-18 | 2006-08-23 | 日本电气株式会社 | Mobile communication system with improved trackability of transmission power control |
| CN1617479A (en) * | 2003-11-14 | 2005-05-18 | 北京三星通信技术研究有限公司 | Method for supporting pilot frequency enhancement in up line special channel enhancement in broad band CDMA |
| WO2006104208A1 (en) * | 2005-03-29 | 2006-10-05 | Ntt Docomo, Inc. | Transmission power control method and mobile station |
| CN101388699A (en) * | 2007-09-12 | 2009-03-18 | 夏普株式会社 | Information feedback method and system based on space, time and frequency domain, customer equipment and base station |
| CN101741437B (en) * | 2008-11-19 | 2013-05-22 | 中国移动通信集团公司 | A method, system and device for uplink power control |
| KR101701262B1 (en) * | 2009-03-17 | 2017-02-02 | 삼성전자 주식회사 | Method and apparatus for uplink transmission power control in multi-carrier communication systems |
| CN101778465B (en) * | 2010-03-09 | 2012-07-11 | 山东大学 | Proportional Power Control Method Based on Error Estimation in CDMA Cellular System |
| CN101977431B (en) * | 2010-10-22 | 2013-06-12 | 上海华为技术有限公司 | Method, device and system for controlling terminal power based on HSUPA |
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| Optional Open Loop Power Control in OFDM Implementation;Dorin Viorel etc;《IEEE C802.16e-05_312》;20050718;第2-4页 * |
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| Publication number | Publication date |
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| CN103563458A (en) | 2014-02-05 |
| CN102883421A (en) | 2013-01-16 |
| WO2012155785A1 (en) | 2012-11-22 |
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