CN101188445A - An adjusting method and device for pilot channel transmission power - Google Patents
An adjusting method and device for pilot channel transmission power Download PDFInfo
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- CN101188445A CN101188445A CNA2007101470555A CN200710147055A CN101188445A CN 101188445 A CN101188445 A CN 101188445A CN A2007101470555 A CNA2007101470555 A CN A2007101470555A CN 200710147055 A CN200710147055 A CN 200710147055A CN 101188445 A CN101188445 A CN 101188445A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- H04W52/343—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading taking into account loading or congestion level
Abstract
The utility model discloses a pilot channel transmitting power adjustment method which consists of the received signal code power RSCP value and the signal-to-interference Ec/Io value of the currently measured pilot channel, which are reported by a network profile receiving mobile platform; the transmitting power value of the pilot channel to be required is decided by the network profile according to the received RSCP value and the Ec/Io value; according to the transmitting power value of the pilot channel to be required, the transmitting power of the pilot channel is adjusted. The invention also provides a corresponding device. The method or the device of the invention can determine the transmitting power of the pilot channel of a base station with precision, thereby controlling the communication area of the control mobile platform and guaranteeing the community communication quality of the mobile platform in a mobile range.
Description
The application requires to submit on 08 26th, 2006 that Patent Office of the People's Republic of China, application number are 200610062338.5, denomination of invention is the priority of the Chinese patent application of " a kind of method of adjustment of emission power of pilot channel ", and its full content is by reference in conjunction with in this application.
Technical field
The present invention relates to wireless communication technology field, relating in particular to is the method for adjustment and the device of emission power of pilot channel in a kind of wireless communication system.
Background technology
Code division multiple access (CDMA) technology is the radio spread spectrum communication technology that is used for a kind of advanced person of digital mobile cellular telecommunication in recent years, and it can satisfy operator to big capacity, high performance-price ratio, the needs of mobile communication efficiently.Cdma network is a cellular mobile telephone network, is made up of many cellular cells, and Access Network mainly comprises base station (BS, Base Station) and base station controller (BSC, Base StationController).Transceiver is arranged in the base station, be responsible for the interior user terminal of its covering area between get in touch; Base station controller is responsible for various control functions such as network resource management, channel switch.
Cdma system is a self-interference system, when communicating between base station and the travelling carriage, except overcoming the link load, also will overcome the interference from this sub-district and neighbor cell.In order to guarantee the communication between base station and the travelling carriage, guarantee their transmitting powers separately, but transmitting power can not be excessive, otherwise can form interference other user.In cdma system, by using spread spectrum and decoding technology, obtain the spread processing gain, resist self-interference capability thereby improve communication system.
In the cdma system, the signal cover of pilot channel (Pilot Channel) has promptly been determined the size of sub-district, adopts pilot channel to come the auxiliary moving platform that other channels are carried out channel estimating usually, as synchronous channel, paging channel, Traffic Channel etc.; By certain and power bias pilot channel are set, form consistent descending covering radius, guarantee the good covering of cell downlink signal.Travelling carriage then passes through the measurement assessment to the signal receiving quality of pilot channel, carries out cell selecting, sub-district gravity treatment or switches to other sub-district, can initiate to have the business of designated communication quality to guarantee travelling carriage.
At present, system generally by link budget or coverage prediction emulation, is the fixing pilot power of cell configuration when carrying out the pilot power configuration, determine cell coverage area thus.Because the environment more complicated of radio transmission, can form this sub-district from other the pilot signal of sub-district and to disturb, available technology adopting link budget or system emulation can not be determined the power of this district pilots channel accurately, especially for indoor covering, the complexity of indoor propagation model is very high, link budget or coverage prediction emulation are difficult more for the accurate control of pilot channel power, it is excessive or too small that pilot power is provided with, thereby can not accurately control the coverage of pilot signal, also just can not the better controlled sub-district in the communication context of travelling carriage.
Because CDMA is the self-interference system, too small if pilot power is provided with, then the coverage of sub-district is less, what travelling carriage can communicate is regional limited, and in addition, also the possibility corresponding setting is too small for the power of other channels, the downlink quality of travelling carriage descends, and has influenced communication quality.If being provided with of pilot power is excessive, then can cause interference to adjacent base station, travelling carriage, influence other user's communication, also brought extra power loss simultaneously, wasted system resource.In addition, if wireless network environment changes, the amount of calculation that the power adjustment is carried out in link budget or system emulation again is bigger, consuming time longer.Wireless network can not reach the optimization state very soon like this, and inappropriate power setting will cause the reduction of systematic function.
Summary of the invention
The embodiment of the invention provides a kind of method of adjustment and device of wireless communication system pilot power, thereby accurately controls the power of pilot channel in the sub-district, to reach the purpose of accurate control travelling carriage communications zone.
The embodiment of the invention provides a kind of method of adjustment of emission power of pilot channel, comprising:
The receiving code power RSCP value of the current measured pilot channel that the network side receiving mobile reports and signal interference ratio Ec/Io value;
Network side is determined the transmission power level of the pilot channel of current needs according to RSCP that is received and Ec/Io value;
According to the transmission power level of determined current needs pilot channel, the transmitting power of pilot channel is adjusted.
The embodiment of the invention also provides a kind of device of adjusting emission power of pilot channel, comprising:
The receiving code power RSCP of the current measured pilot channel that receiving element, receiving mobile report and signal interference ratio Ec/Io value;
Calculate and adjustment unit,, determine the transmission power level of the pilot channel of current needs, according to the transmission power level of the pilot channel of determining, the transmitting power of pilot channel is adjusted again according to described RSCP and the Ec/Io value that described receiving element receives.
In the scheme of the adjustment pilot power that the embodiment of the invention provides, received signal code power RSCP value and Ec/Io value by measurement pilot, and according to RSCP value that measures and Ec/Io value, calculate the transmission power level of pilot channel, adjust the transmitting power of pilot channel according to the transmission power level that calculates resulting pilot channel.Can determine the transmitting power of base station pilot channels so accurately, thereby the communications zone of control travelling carriage strengthens the antijamming capability of communicating by letter between base station and the travelling carriage, guarantees travelling carriage determined sub-district communication quality in moving range; Can adjust the pilot channel power setting more timely and accurately.In addition, the employing embodiments of the invention can be easily along with readjusting of power carried out in the variation of wireless network environment.
Description of drawings
Fig. 1 is the method for adjustment flow chart of pilot power in the wireless communication system of the embodiment of the invention;
Fig. 2 is that the pilot power adjusting device of the embodiment of the invention constitutes schematic diagram.
Embodiment
In the system of employing code division multiple access (CDMA) technology, (WCDMA) is example with Wideband Code Division Multiple Access (WCDMA), in conjunction with embodiment, the present invention is further detailed.In the WCDMA system, base station controller is called RNC, and the base station is called Node B, and RNC and Node B can close and belong to network side, and in this system, pilot channel is called Common Pilot Channel (CPICH, Common Pilot Channel).Its flow process can be with reference to figure 1:
Step 101, the Mobile Origination call testing;
During the Mobile Origination call testing, call out a test number, carry out and being connected of network side.After network side detected the test number, automatic-answering back device also sent descending common frequency measurement control command to travelling carriage.Above-mentionedly can provide the automatic-answering back device service, perhaps transfer to some servers (as the call center) automatic-answering back device by network side itself.In the present embodiment, comprise the indication information that the requirement travelling carriage reports Common Pilot Channel CPICH received signal code power (RSCP, Receiving SignalCode Power) value and Common Pilot Channel CPICH signal interference ratio (Ec/Io) value in the described descending common frequency measurement control command;
In the process of test, travelling carriage can move within the specific limits, and network side periodically sends descending common frequency measurement control command to travelling carriage; Described scope is the coverage of wishing definite sub-district.
Step 102, travelling carriage sends measurement report to network side;
After travelling carriage receives the descending common frequency measurement control command of network side transmission, measure current C PICH RSCP and CPICH Ec/Io, and send same-frequency measure reporting, comprise current CPICH RSCP that measures and CPICH Ec/Io value in the described report to network side;
In this process, because network side periodically sends descending common frequency measurement control command to travelling carriage, travelling carriage is periodically measured CPICH RSCP and CPICH Ec/Io value, and measurement result is periodically reported.
Step 103, network side obtains measurement report, and according to the current transmit power of measurement report content and base station, calculates the transmitting power of the pilot channel of current needs;
In this process, network side then can obtain current C PICH RSCP and CPICH Ec/Io value that moving table measuring arrives after receiving the measurement report of travelling carriage transmission, and the transmitting power current according to Node B, calculate the transmitting power of the pilot channel of current needs, process is as follows:
1) network side writes down CPICH RSCP and the CPICH Ec/Io value that current mobile station reports.
2) network side obtains the current total transmitting power of Node B and the transmitting power of downlink pilot frequency channel.
In this step, also can obtain base station current transmit power load level percentage, and pilot channel power account for the base station can be with the ratio of total transmitting power.
3) the downlink pilot frequency channel transmitting power of the current needs of calculating, the CPICHRSCP that travelling carriage is reported exceeds enough levels than other interference except that downlink power of this sub-district, satisfies the CPICH Ec/Io requirement that travelling carriage reports thus.Introduce a kind of computational methods below:
Total interference power: Io=CPICH RSCP measured value/(CPICH Ec/Io measured value)
This area interference: Ior=CPICH RSCP measured value * (the current total transmitting power of Node B/downlink pilot frequency channel transmitting power)
If step 2) in obtain be base station current transmit power load level percentage, and pilot channel power account for the base station can be with the ratio of total transmitting power, then this area interference is:
This area interference: Ior=CPICH RSCP measured value * (base station current transmit power load level percentage/pilot channel power account for base station can with the ratio of total transmitting power)
Other interference except that downlink power: this area interference of the total interference power Io-of Iouw=Ior
The CPICH RSCP value of current needs=other disturb Iouw* pilot tone protection surplus M
Described pilot tone protection surplus M is a set point, and it is provided with according to being physical isolation degree between this sub-district and the neighbor cell, such as indoor to outdoor exterior wall penetration loss; And the fading margin size of current wireless channel circumstance; The concrete environment of propagating according to current wireless is provided with.
The emission power of pilot channel of current needs=current downlink pilot frequency channel transmitting power * (the CPICH RSCP value of current needs/CPICH RSCP measured value)
Then can obtain the emission power of pilot channel of current needs according to the aforementioned calculation method.
Step 104, the emission power of pilot channel of the current needs that step 103 is obtained carries out level and smooth or Filtering Processing, and the emission power of pilot channel value of the current needs that draw after the recording processing.
Carry out level and smooth or Filtering Processing mainly is in order to remove signal fadeout influence in short-term to the emission power of pilot channel of current needs, as carry out following level and smooth scheme:
Network side writes down in nearest a period of time or the emission power of pilot channel of the current needs that obtain several times recently, and gets the emission power of pilot channel value that wherein minimum value needs after as smoothing processing; And the emission power of pilot channel value of the current needs that drawn after treatment of record.
In the call testing process, travelling carriage carries out descending common frequency measurement and can periodically carry out, after network side is whenever received the measurement report that travelling carriage reports, can calculate the emission power of pilot channel value of current needs, the emission power of pilot channel value of each current needs that measure with several times compares then, as in desirable nearest a period of time or the preceding performance number that obtains several times, get the emission power of pilot channel value that wherein minimum value needs after as smoothing processing.Time period in this step or number of times can be set according to the test case of reality, generally get 3-10 time or 3-10 second; As: get current measured value and each emission power of pilot channel value of measuring within preceding 5 seconds compares, get the emission power of pilot channel value that minimum value needs after as smoothing processing; Or get current measured value and preceding each emission power of pilot channel value of measuring for 5 times compares, get the emission power of pilot channel value that minimum value needs after as smoothing processing.
Step 105, judge whether the call testing process finishes, if the call testing process finishes, then execution in step 106, if the call testing process does not finish, then network side continues to send descending common frequency measurement control command to travelling carriage, continue execution in step 102 with and subsequent step, measure current C PICHRSCP and CPICH Ec/Io value and also report same-frequency measure reporting.
Step 106, the emission power of pilot channel of the current needs that obtain according to step 104 is determined the transmitting power of the pilot channel that finally need adjust to.
In this step, travelling carriage call testing process finishes, because test process is periodic, travelling carriage whenever reports the one-shot measurement report, network side all can obtain behind the measurement report and carry out corresponding calculated, obtain the emission power of pilot channel of current needs, after the level and smooth or Filtering Processing through step 104, network side can write down the emission power of pilot channel value of a series of current needs that drawn after treatment, in the travelling carriage moving process, testing location may be away from the base station, and needed transmitting power also increases gradually, therefore, can in these values, get a maximum as the emission power of pilot channel value that finally need adjust to.
Step 107 is adjusted the transmitting power of pilot channel, and adjusts other channel transmitting power according to emission power of pilot channel.
In this step, the emission power of pilot channel value that Node B adjusts to according to the final needs that obtained in the step 106, adjust the transmitting power of pilot channel, then according to adjusted emission power of pilot channel, power to other channel is adjusted accordingly, guarantees the good covering of cell downlink.
From top embodiment as can be seen, the method for adjustment of emission power of pilot channel can be realized by following steps:
The receiving code power RSCP value of the current measured pilot channel that the network side receiving mobile reports and signal interference ratio Ec/Io value;
Network side is determined the transmission power level of the pilot channel of current needs according to RSCP that is received and Ec/Io value;
According to the transmission power level of the pilot channel of determined current needs, the transmitting power of pilot channel is adjusted.
Those of ordinary skills can rule of thumb directly draw, above-mentioned travelling carriage reports the receiving code power RSCP value and the signal interference ratio Ec/Io value of current measured pilot channel, can be by the Mobile Origination call testing, network side detects and sends descending common frequency measurement control command to travelling carriage behind the call testing and trigger; Also can initiatively send descending common frequency measurement control command, require travelling carriage to report the receiving code power RSCP value and the signal interference ratio Ec/Io value of current measured pilot channel by network side to travelling carriage.
Those of ordinary skill in the art can go out in direct derivation, and the method for adjustment of emission power of pilot channel also can be realized by the following examples:
A) Mobile Origination call testing.After network side detects Mobile Originated call testing, send descending common frequency measurement control command.
Network side can repeatedly send descending common frequency measurement control command to travelling carriage, requires travelling carriage to receive that this control command is promptly measured and report to the network side return measurement.Descending common frequency measurement control command specifically can periodicity or randomness transmission in the call testing time-continuing process.
B) travelling carriage sends measurement report to network side, comprises information such as Common Pilot Channel CPICH received signal code power (RSCP, Receiving Signal Code Power) value and Common Pilot Channel CPICH signal interference ratio (Ec/Io) value in the measurement report.
C) network side obtains measurement report, and according to the current transmit power of measurement report content and base station, calculates the transmitting power of the pilot channel of current needs.
D) judge whether call testing finishes.When call testing was still continuing, network side continued to send descending common frequency measurement control command, received the transmitting power of calculating the pilot channel of current needs behind the measurement report.
When call testing finishes, stop to send descending common frequency measurement control command, and according to the transmitting power of the pilot channel that repeatedly calculates the current needs of gained, determine the transmitting power of the pilot channel that finally need adjust to.The transmitting power of the pilot channel that calculates current needs is carried out level and smooth or is filtered into more excellent scheme.Level and smooth or filtering is carried out at the transmitting power of the pilot channel of the current needs that calculate, and is placed on before the transmitting power of the definite pilot channel that finally need adjust to, all can before or after determining step.
E) transmitting power of the pilot channel of adjusting to according to final needs is adjusted the transmitting power of pilot channel, and is adjusted other channel transmitting power according to emission power of pilot channel.
In the such scheme, in the step a), network side also can be only sends once descending common frequency measurement control command to travelling carriage, requires travelling carriage to receive that this control command is promptly measured and report to the network side return measurement.Execution in step b afterwards) c), the transmitting power of the pilot channel of adjusting to according to current needs is adjusted the transmitting power of pilot channel, and is adjusted other channel transmitting power according to emission power of pilot channel again.
Those of ordinary skill in the art can go out equally in direct derivation, and the method for adjustment of emission power of pilot channel also can be realized by the following examples:
A) network side sends descending common frequency measurement control command to travelling carriage.
Network side sends once descending common frequency measurement control command to travelling carriage, takes multiple measurements and reports to the network side return measurement after requiring travelling carriage to receive this control command.The transmission of descending common frequency measurement and measurement report can be indicated as periodically or randomness ground is carried out.
B) travelling carriage sends measurement report to network side, carries information such as Common Pilot Channel CPICH received signal code power (RSCP, Receiving Signal Code Power) value and Common Pilot Channel CPICH signal interference ratio (Ec/Io) value.
C) network side obtains measurement report, and according to the current transmit power of measurement report content and base station, calculates the transmitting power of the pilot channel of current needs.
D) judge whether call testing finishes.When call testing was still continuing, network side continued the measurement report that receiving mobile sends, and calculated the transmitting power of the pilot channel of current needs.
When call testing finishes, according to the transmitting power of the pilot channel that repeatedly calculates the current needs of gained, the transmitting power of the definite pilot channel that finally need adjust to.Travelling carriage stops to carry out descending common frequency measurement can be notified by network side, or travelling carriage stops voluntarily according to the setting in call testing cycle.Level and smooth or filtering can be carried out equally to the transmitting power of the pilot channel that calculates current needs, more excellent result can be obtained.Level and smooth or filtering is carried out at the transmitting power of the pilot channel of the current needs that calculate, and is placed on before the transmitting power of the definite pilot channel that finally need adjust to, all can before or after determining step.
E) transmitting power of adjustment pilot channel, and other channel transmitting power guarantees descending good covering.
Those of ordinary skill in the art can direct derivation goes out to adjust the device embodiment of emission power of pilot channel.With reference to Fig. 2, a kind of device 200 of adjusting emission power of pilot channel comprises:
Receiving element 210 is used for the received signal code power RSCP and the signal interference ratio Ec/Io value of the current measured pilot channel that receiving mobile reports;
Calculate and adjustment unit 220,, calculate the transmission power level of the pilot channel of current needs, according to the transmission power level of the pilot channel of determining, the transmitting power of pilot channel is adjusted again according to described RSCP and the Ec/Io value that described receiving element 210 receives.
This device can also comprise:
Only sending once descending common frequency measurement control command a call testing process indicates travelling carriage repeatedly among the embodiment of reporting measurement reports, when the call testing process finishes, can send the control command that stops descending common frequency measurement to travelling carriage by control unit and stop the descending common frequency measurement of travelling carriage and send measurement report.
This device also can comprise:
Transmitting power acquiring unit 240 links to each other with calculating and adjustment unit 220, is used to obtain the current total transmitting power of base station and the transmitting power of downlink pilot frequency channel; Perhaps obtain base station current transmit power load level percentage, and pilot channel power account for the base station can be with the ratio of total transmitting power, and the value that will obtain sends to and calculates and adjustment unit 220.
Calculate and adjustment unit 220 in conjunction with above-mentioned value and RSCP and the Ec/Io value obtained from receiving element 210, calculate the transmission power level of the pilot channel of current needs, according to the transmission power level of the pilot channel of determining, the transmitting power of pilot channel is adjusted again.
This device also can comprise:
Judging unit 250 after calculating and adjustment unit 220 calculates the transmitting power of pilot channel of current needs, judges whether this call testing is finished.
Only sending once descending common frequency measurement control command a call testing process indicates travelling carriage repeatedly among the embodiment of reporting measurement reports, when judging call testing and not finishing, judging unit 250 can notify calculating and adjustment unit 220 to continue to handle the measurement report that receiving elements 210 send, and calculate the current transmission power level that needs pilot channel, also can not notify and calculate and adjustment unit 220, or only judge next time that then calculating and adjustment unit 220 acquiescences continue to handle the measurement report that receiving elements 210 send; When judging the call testing process and finish, notice is calculated and adjustment unit 220, according to the transmission power level of the pilot channel of the current needs of determining, the transmitting power of pilot channel is adjusted, and can be notified control unit 230 call testings to finish.
Sending repeatedly descending common frequency measurement control command a call testing process indicates among the embodiment of travelling carriage reporting measurement reports, when judging call testing and not finishing, judging unit 250 notices are calculated and adjustment unit 220 continues to handle the measurement report that receiving element 210 sends, and calculate the transmission power level of the pilot channel of current needs, perhaps do not notify, calculate and end of adjustment unit 220 default call test, continue to handle the measurement report that receiving element 210 sends; When judging the end of call testing process, notice is calculated and adjustment unit 220 and control unit 230, calculating and adjustment unit 220 are according to the transmission power level of the pilot channel of the current needs of determining, transmitting power to pilot channel is adjusted, 230 of control units can stop to send descending common frequency measurement control command to travelling carriage after the notice of receiving judging unit 250.
In this device, calculating and adjustment unit can also be further used for:
According to the transmission power level of the pilot channel of a series of current needs that in test process, obtain, determine the transmitting power of the pilot channel that finally need adjust to.
This device can also comprise:
Comprise among the embodiment of processing unit, calculate and adjustment unit 220 can calculate and the transmission power level of the pilot channel of the current needs of adjustment unit 220 according to being returned to by processing unit 260, the transmitting power of the definite pilot channel that finally need adjust to is adjusted.By the foregoing description as can be seen, the down-bound pilot frequency signal that the base station is sent can be accomplished good covering, and the communication quality of determined sub-district each point can be guaranteed in the travelling carriage moving range; Can determine the transmitting power of base station pilot channels accurately by embodiment of the present invention, thereby control the communications zone of travelling carriage; When avoiding adopting conventional link budget or coverage prediction emulation, pilot power is provided with too small, influences communication quality, or pilot power is provided with excessively, causes extra power loss, and other travelling carriage is caused problems such as interference.
It will be appreciated by those skilled in the art that, all or part of functional module in the foregoing description and each step can instruct related hardware to realize by program, described program can be stored in the computer read/write memory medium, and described storage medium is as ROM/RAM, disk, laser disc etc.Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
By the foregoing description as can be known, can determine the transmitting power of base station pilot channels accurately according to the present invention, thereby the communications zone of control travelling carriage strengthens the antijamming capability of communicating by letter between base station and the travelling carriage, guarantees travelling carriage determined sub-district communication quality in moving range; Can adjust the pilot channel power setting more timely and accurately.In addition, along with the variation of wireless network environment, adopt method of the present invention can carry out readjusting of power easily.
The method of adjustment of pilot power and device in the wireless communication system provided by the invention can be widely used in adopting the wireless telecommunication system of CDMA (Code Division Multiple Access), as CDMA, WCDMA, CDMA2000 etc.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. the method for adjustment of an emission power of pilot channel is characterized in that, comprising:
The receiving code power RSCP value of the current measured pilot channel that the network side receiving mobile reports and signal interference ratio Ec/Io value;
Network side is determined the transmission power level of the pilot channel of current needs according to RSCP that is received and Ec/Io value;
According to the transmission power level of determined pilot channel, the transmitting power of pilot channel is adjusted.
2. method according to claim 1 is characterized in that, before the RSCP value and Ec/Io value that described network side receiving mobile reports, further comprises:
After network side detects Mobile Originated test call, send descending common frequency measurement control command, comprise the indication information that the requirement travelling carriage reports downlink pilot frequency channel RSCP value and Ec/Io value in the described descending common frequency measurement control command to travelling carriage.
3. method according to claim 2 is characterized in that,
Sending descending common frequency measurement control command to travelling carriage is, sends once descending common frequency measurement control command, requires travelling carriage periodically to report the indication information of downlink pilot frequency channel RSCP value and Ec/Io value.
4. according to claim 1,2 or 3 described methods, it is characterized in that, after the transmission power level of the pilot channel of determining current needs, if call testing does not finish, then continue the RSCP and the Ec/Io value of the current measured pilot channel that receiving mobile reports, and determine the transmission power level of the pilot channel of current needs according to the RSCP that is received and Ec/Io; If call testing finishes, then, the transmitting power of pilot channel is adjusted according to the transmission power level of determined pilot channel.
5. method according to claim 2 is characterized in that,
Sending descending common frequency measurement control command to travelling carriage is, periodically sends descending common frequency measurement control command, requires travelling carriage to report the indication information of downlink pilot frequency channel RSCP value and Ec/Io value.
6. according to claim 2 or 5 described methods, it is characterized in that, after the transmission power level of the pilot channel of determining current needs, if call testing does not finish, then continue to send descending common frequency measurement control command, the RSCP of the current measured pilot channel that receiving mobile reports and Ec/Io value, and determine the transmission power level of the pilot channel of current needs according to the RSCP that is received and Ec/Io; If call testing finishes, then, the transmitting power of pilot channel is adjusted according to the transmission power level of determined pilot channel.
7. according to claim 3 or 5 described methods, it is characterized in that described transmission power level according to determined pilot channel comprises the transmitting power adjustment of pilot channel:
According to the emission power of pilot channel value of a series of current needs that obtained, in these values, get maximum as the emission power of pilot channel value that finally need adjust to;
The emission power of pilot channel value that the base station is adjusted to according to final needs is adjusted the transmitting power of pilot channel.
8. according to claim 1,2,3 or 5 described methods, it is characterized in that, after the transmission power level of the described pilot channel of determining current needs, further comprise before the transmitting power of pilot channel adjusted:
Network side carries out level and smooth or Filtering Processing to the transmitting power of the pilot channel of described definite current needs.
9. method according to claim 8 is characterized in that, described smoothing processing specifically comprises:
With in the emission power of pilot channel of current record and a period of time recently or the emission power of pilot channel of each current needs that obtain several times recently compare, and get the emission power of pilot channel value that wherein minimum value needs after as smoothing processing.
10. according to each described method in the claim 1,2,3 or 5, it is characterized in that, described according to RSCP that is received and Ec/Io value, determine that the step of the transmission power level of pilot channel specifically comprises:
The RSCP and the Ec/Io value of the downlink pilot frequency channel that network side acquisition current mobile station reports;
Obtain the total transmitting power of current base station and the transmitting power of downlink pilot frequency channel, perhaps obtain current base station transmitting power load level percentage, and pilot channel power account for the base station can be with the ratio of total transmitting power;
Calculate according to the parameter of being obtained, determine the emission power of pilot channel of current needs.
11. method according to claim 10 is characterized in that, describedly calculates the emission power of pilot channel of determining current needs according to the parameter of being obtained, and specifically comprises:
Total interference power: Io=RSCP measured value/(Ec/Io measured value)
This area interference: Ior=RSCP measured value * (the total transmitting power of current base station/downlink pilot frequency channel transmitting power) or
This area interference: Ior=RSCP measured value * (current base station transmitting power load level percentage/pilot channel power account for base station can with the ratio of total transmitting power)
Other interference: this area interference of the total interference power Io-of Iouw=Ior
The RSCP value of current needs=other disturb Iouw
*Pilot tone protection surplus M
The emission power of pilot channel of current needs=current downlink pilot frequency channel transmitting power * (the RSCP value/RSCP measured values of current needs).
12. a device of adjusting emission power of pilot channel is characterized in that, comprising:
Receiving element is used for the receiving code power RSCP and the signal interference ratio Ec/Io value of the current measured pilot channel that receiving mobile reports;
Calculate and adjustment unit, be used for described RSCP and Ec/Io value, determine the transmission power level of the pilot channel of current needs, according to the transmission power level of the pilot channel of determining, the transmitting power of pilot channel is adjusted again according to described receiving element reception.
13. device according to claim 12 is characterized in that, this device also comprises:
Control unit is used for sending descending common frequency measurement control command to travelling carriage;
The transmitting power acquiring unit links to each other with calculating and adjustment unit, is used to obtain the current total transmitting power of base station and the transmitting power of downlink pilot frequency channel; Or base station current transmit power load level percentage, and pilot channel power account for the base station can be with the ratio of total transmitting power, and the value that will obtain sends to and calculates and adjustment unit;
Calculate and adjustment unit is further used for: the described RSCP and the Ec/Io value that receive according to described receiving element, and the value obtained of described transmitting power acquiring unit, determine the transmission power level of the pilot channel of current needs.
14. device according to claim 12 is characterized in that,
Described device also comprises: judging unit, after calculating and adjustment unit calculate the transmitting power of pilot channel of current needs, judge whether this call testing is finished, when this call testing is finished, notice is calculated and the transmission power level of the pilot channel that the adjustment unit basis is determined, the transmitting power of pilot channel is adjusted;
Described calculating and adjustment unit are further used for, and according to the notice of described judging unit, the transmitting power of pilot channel are adjusted.
15. device according to claim 12 is characterized in that, described calculating and adjustment unit are further used for:
Transmission power level according to the pilot channel of a series of current needs that in test process, obtain, the transmitting power of the definite pilot channel that finally need adjust to, the transmission power level of the pilot channel of adjusting to according to determined final needs is adjusted the transmitting power of pilot channel.
16. device according to claim 12 is characterized in that, this device also comprises:
Processing unit is used for the transmitting power of calculating and adjustment unit calculates the pilot channel of the current needs of gained is carried out level and smooth or Filtering Processing, and will be level and smooth or the filtering result return to and calculate and adjustment unit;
Described calculating and adjustment unit are further used for:
Determine the transmitting power of the pilot channel that final needs are adjusted to according to level and smooth or filtering result, and the transmission power level of the pilot channel of adjusting to according to the final needs of determining, the transmitting power of pilot channel is adjusted.。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| WO2010078790A1 (en) * | 2008-12-29 | 2010-07-15 | 华为技术有限公司 | Transmission power adjusting method, apparatus and system |
| WO2010083707A1 (en) * | 2009-01-22 | 2010-07-29 | 中共通祝股份有限公司 | Method and system for controlling pilot power of home nodeb |
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| US5771461A (en) * | 1996-06-28 | 1998-06-23 | Motorola, Inc. | Method and apparatus for power control of a first channel based on a signal quality of a second channel |
| JP2005328525A (en) * | 2004-05-04 | 2005-11-24 | Samsung Electronics Co Ltd | Method and apparatus for selecting optimal scheduling cells for soft handover terminal in uplink packet transmission system |
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