CN101192879B - An antenna rate control method and system - Google Patents

An antenna rate control method and system Download PDF

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CN101192879B
CN101192879B CN2006101467933A CN200610146793A CN101192879B CN 101192879 B CN101192879 B CN 101192879B CN 2006101467933 A CN2006101467933 A CN 2006101467933A CN 200610146793 A CN200610146793 A CN 200610146793A CN 101192879 B CN101192879 B CN 101192879B
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transmitting
noise ratio
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CN101192879A (en
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刘云辉
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Lenovo Beijing Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0426—Power distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/24—Monitoring; Testing of receivers with feedback of measurements to the transmitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Signal Processing (AREA)
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  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a per-antenna rate control method and a system; wherein, the method comprises the steps that: a base station acquires the signal-to-interference-and-noise ratios of different transmitting antenna according to the feedback information of a mobile station and determines the modulation and coding modes adopted for each transmitting antenna according to the signal-to-interference-and-noise ratio; the balancing of the transmit power is carried out between different transmitting antennas according to the signal-to-interference-and-noise ratio of each antenna, the modulation and coding modes adopted for each transmitting antenna and the corresponding relation ensured by the target QoS. The invention can implement the balancing of the transmit power between different transmitting antennas so as to strive as much as possible to ensure that the transmission on each link meets the QoS requirement of the system without wasting the transmit power and causing the interference or strive as much as possible to ensure that each antenna uses the minimum transmit power required for acquiring the target QoS to carry out the transmitting according to the result of the adaptive modulation coding and QoS requirement of the system.

Description

A kind of every day wire rate control method and system
Technical field
The present invention relates to the MIMO technique in the communication field, particularly relate to a kind of every day of wire rate control method and system.
Background technology
In the 3G (Third Generation) Moblie broadband CDMA system, in order further to improve message transmission rate, the researcher has proposed high-speed downlink grouped data access technology, i.e. HSDPA.Recently, MIMO technique (MIMO) is applied to back 3G system, with further raising message transmission rate.Wherein, A kind ofly be called PARC (wire rate control every day; Per-antenna-rate-control) MIMO transmission technology is suggested, and (sees: 3GPP25.876 V1.8.0 (2005.10)-Multiple-Input Multiple Output in UTRA) as one of candidate technologies of 3GPP WCDMAR7 standard.Its basic thought is exactly the feedback information according to travelling carriage, and Node B (base station) adopts different modulation and coding techniques, i.e. Adaptive Modulation and Coding (AMC) for transmitting of distinct transmit antenna.To be the base station select the table of distinct transmit data rate according to the difference of every antenna SINR (Signal to Interference plus Noise Ratio) to following table, assumes base stations as two transmit antennas, representes with antenna A and antenna B.
Figure G061E6793320061201D000011
Can find out that by last table parc technology is according to the SINR of the different transmit antennas of travelling carriage feedback, for every transmit antennas is selected different data-modulated mode and coding.But parc technology does not carry out self adaptation to transmitting power and distributes, and every antenna such as has still adopted at transmitting power.
In order further to improve performance, transmitter is according to the different modulation modes of feedback information and transmitter employing, and it is necessary carrying out the adaptive power distribution.Its reason has: at first, the decline that signal met with of launching on every transmit antennas is different with interference, and this is embodied in different received Signal to Interference plus Noise Ratio (SINR); But then, the signal from different transmission antennas transmit can be very not big in the SINR of receiving terminal difference; Secondly, suppose that transmitter only selects on QPSK (quadriphase PSK) and two kinds of modulation systems of 16QAM (quadrature amplitude modulation), as above shown in the table options 3, promptly the A transmitting antenna adopts the QPSK modulation, and B transmitting antenna employing 16QAM modulates.Under the situation of QPSK modulation, receiver only needs the phase information promptly can demodulated received signal, still; If 16QAM modulation; Receiver not only need carry out signal amplitude estimation distinguishing constellation point, but also needs phase information with constellation point separately, thus restituted signal.It is thus clear that the 16QAM modulation signal is higher to the requirement of signal power than qpsk modulation signal, in other words, under the condition that obtains identical decoding performance, the 16QAM modulation signal needs higher SINR than qpsk modulation signal, otherwise demodulation performance can descend.On the other hand; If according to the launching technique that it is as shown in the table,, adopt the required SINR of the signal demodulation of A transmitting antenna of QPSK modulation saturated so at receiver; And the required SINR of the signal demodulation of the B transmitting antenna of employing 16QAM modulation maybe be also enough high; On this meaning, also be necessary to carry out power division, make the every transmit antennas that adopts the different modulating mode in the approaching ideal value separately of the corresponding SINR of receiving terminal.
Summary of the invention
The object of the present invention is to provide a kind of every day of wire rate control method and system; Wire rate control method every day that solves prior art is only carried out simple constant power distribution, the technical problem that can not carry out simple and effective power adjustments according to the modulation and the coding of transmitting antenna.
To achieve these goals, the invention provides a kind of every day of wire rate control method, wherein, comprise the steps:
Step 1, the base station obtains the Signal to Interference plus Noise Ratio of different transmit antennas according to the feedback information of travelling carriage, and confirms modulation and the coded system that every transmit antennas adopts according to said Signal to Interference plus Noise Ratio;
Step 2 according to the corresponding relation of the Signal to Interference plus Noise Ratio of every antenna, the modulation of being adopted and coded system and destination service quality assurance, is carried out the balance of transmitting power between the distinct transmit antenna.
Above-mentioned method; Wherein, In said step 2; Realize the balance of said transmitting power through following mode: under the constraints of total transmitting power, the transmitting antenna that obtains the destination service quality assurance is adopted to obtain the minimum emissive power of said destination service quality assurance, and the transmit power allocations that will have more than needed out is given the transmitting antenna that does not also obtain the destination service quality assurance.
Above-mentioned method, wherein, said step 1 comprises:
Step a, the mode that the base station adopts constant power to distribute is launched one group of antenna orthogonal pilot signal, and receiver is measured the Signal to Interference plus Noise Ratio of the reception signal of corresponding transmitting antenna, and feeds back to the base station;
Step b, adaptive modulation and coding is carried out according to the Signal to Interference plus Noise Ratio of different transmit antennas in the base station, is the high emitting antenna selecting high order modulation of Signal to Interference plus Noise Ratio, is the low emitting antenna selecting low-order-modulated of Signal to Interference plus Noise Ratio.
Above-mentioned method, wherein, said step 2 comprises:
Step c according to the selected modulation system of transmitting antenna, confirms that transmitting antenna will obtain the required minimum Signal to Interference plus Noise Ratio of destination service quality assurance;
Steps d is if the current Signal to Interference plus Noise Ratio of transmitting antenna, confirms then that said transmitting antenna is operated in the saturation emission power district greater than said minimum Signal to Interference plus Noise Ratio, if be not operated in the transmitting antenna in the saturation emission power district, then process ends;
Step e is if the current Signal to Interference plus Noise Ratio of transmitting antenna, confirms then that said transmitting antenna is operated in the unsaturation transmitting power district less than said minimum Signal to Interference plus Noise Ratio, if be not operated in the transmitting antenna in the unsaturation transmitting power district, then process ends;
Step f, the transmitting power that will be in all transmitting antennas in the saturation emission power district is adjusted a downward modulation step pitch separately downwards;
Step g; The transmitting power that will be in all transmitting antennas in the unsaturation transmitting power district adjusts upward one separately and raises step pitch; Said rise step pitch is calculated through following formula: k=Nu*&p/Nd, and wherein k is for raising step pitch, and Nu is the number that is in all transmitting antennas in the saturation emission power district; &p is the downward modulation step pitch, and Nd is in the number of all transmitting antennas in the unsaturation transmitting power district;
Step g is that every transmit antennas is measured the Signal to Interference plus Noise Ratio that receives signal again, and feeds back to the base station, returns step e.
In order to realize the object of the invention, the present invention also provide a kind of every day the wire rate control system, comprise the base station, wherein, also comprise the control device of transmitting power; Said base station obtains the Signal to Interference plus Noise Ratio of different transmit antennas according to the feedback information of travelling carriage, and confirms modulation and the coded system that every transmit antennas adopts according to said Signal to Interference plus Noise Ratio; Said control device is used for, and according to the corresponding relation of the Signal to Interference plus Noise Ratio of every antenna, the modulation of being adopted and coded system and destination service quality assurance, between the distinct transmit antenna, carries out the balance of transmitting power.
Above-mentioned system; Wherein, Under the constraints of total transmitting power; Said control device adopts the transmitting antenna that obtains the destination service quality assurance can obtain the minimum emissive power of said destination service quality assurance, and the transmit power allocations that will have more than needed out is given the transmitting antenna that does not also obtain the destination service quality assurance.
In order to realize the object of the invention; The present invention also provide a kind of every day the wire rate control device; Wherein, comprising: minimum Signal to Interference plus Noise Ratio determination module is used for: the base station obtains the Signal to Interference plus Noise Ratio of different transmit antennas and confirmed modulation that every transmit antennas adopted and coded system according to the feedback information of travelling carriage after; According to the selected modulation system of transmitting antenna, confirm that transmitting antenna will obtain the required minimum Signal to Interference plus Noise Ratio of destination service quality assurance; Saturation emission power judge module; Be used to carry out: if the current Signal to Interference plus Noise Ratio of transmitting antenna is greater than said minimum Signal to Interference plus Noise Ratio as judging; Confirm that then said transmitting antenna is operated in the saturation emission power district; If be not operated in the transmitting antenna in the saturation emission power district, then finish power control; Unsaturation transmitting power judge module; Be used to carry out: if the current Signal to Interference plus Noise Ratio of transmitting antenna is less than said minimum Signal to Interference plus Noise Ratio as judging; Confirm that then said transmitting antenna is operated in the unsaturation transmitting power district; If be not operated in the transmitting antenna in the unsaturation transmitting power district, then finish power control; The saturation emission power regulation module is used for: the transmitting power that will be in all transmitting antennas in the saturation emission power district is adjusted a downward modulation step pitch separately downwards; Unsaturation transmitting power adjusting module; Be used for: the transmitting power that will be in all transmitting antennas in the unsaturation transmitting power district adjusts upward one separately and raises step pitch; Said rise step pitch is calculated through following formula: k=Nu*&p/Nd, and wherein k is for raising step pitch, and Nu is the number that is in all transmitting antennas in the saturation emission power district; &p is the downward modulation step pitch, and Nd is in the number of all transmitting antennas in the unsaturation transmitting power district; The circulation module is used for: obtain the Signal to Interference plus Noise Ratio of the every transmit antennas that remeasures, and send to said saturation emission power judge module and said unsaturation transmitting power judge module.
The invention has the advantages that:
1) on the basis that former PARC constant power distributes, increased power reallocation according to modulation system;
2) a kind of reassignment method of dump power has been proposed;
3) with the comparison of former PARC: do not influence the message transmission rate that PARC obtains, but had increased access to the raising of transmission performance, reduced interference with rational complexity.
In a word; The present invention can be according to the result of Adaptive Modulation and Coding; And the system QoS demand, and the corresponding relation of different modulating mode and target QoS, SINR demand carries out the balance of transmitting power between the transmitting power of different transmit antennas; Make the transmission of every link satisfy the system QoS demand as possible, and don't the waste transmitting power is disturbed with producing.In other words, make every antenna all use the minimum emissive power that obtains target QoS and need to launch as possible.
Description of drawings
Fig. 1 is the flow chart of steps of the inventive method;
Fig. 2 is the basic physical layer architecture of the HS-DSCH channel of use the inventive method;
Fig. 3 is the detail flowchart of the inventive method.
Embodiment
The present invention has proposed to carry out for different antennae wire rate control technology every day of power division on the basis of existing parc technology, narration for ease, and this technology can be abbreviated as P 2ARC (PowerPer-Antenna Rate Control).Among the present invention, distinct transmit power is distributed according to the feedback signal of travelling carriage and the result of adaptive modulation and coding in the base station on every transmit antennas.Say that roughly the present invention is the more transmitting power of signal allocation for 16QAM modulation, and to the less transmitting power of signal allocation of QPSK modulation.
Fig. 1 is the flow chart of steps of the inventive method, and like figure, the inventive method comprises the steps:
Step 101, the base station obtains the Signal to Interference plus Noise Ratio of different transmit antennas according to the feedback information of travelling carriage, and confirms modulation and the coded system that every transmit antennas adopted according to said Signal to Interference plus Noise Ratio;
Step 102 according to the corresponding relation of the Signal to Interference plus Noise Ratio of every antenna, the modulation of being adopted and coded system and target QoS (service quality assurance), is carried out the balance of transmitting power between the distinct transmit antenna.
Fig. 2 is the basic physical layer architecture of the HS-DSCH channel (downlink sharied signal channel) that uses the inventive method, and as shown in Figure 2, the present invention adds power division on the basis of former PARC scheme, i.e. p1 ..., pT, but receive total transmitting power P tConstraint.It is thus clear that; Among the present invention, according to the travelling carriage feedack, Node B at first confirms the modulation and the coded system of every transmit antennas; Then; According to the modulation and the coded system of feedback information and selection, confirm the transmitting power of every transmit antennas again, make receiver equal or approaching the demodulation performance that every transmit antennas sends signal.
Fig. 3 is the detail flowchart of the inventive method, below in conjunction with the detailed implementation step that specifies invention like Fig. 3 (N wherein tNumber for transmit antenna elements):
Step 301:NodeB adopts constant power to distribute, i.e. P t/ N t, launch one group of antenna orthogonal pilot signal;
Step 302: receiver is measured the reception signal Signal to Interference plus Noise Ratio SINR of corresponding transmitting antenna i, 1＜=i＜=N t,, feed back SINR then for the SINR sum that records on all reception antennas iInformation is given NodeB;
Step 303: according to the feedback information that receives, NodeB carries out adaptive modulation and coding according to the Signal to Interference plus Noise Ratio information of receiver feedback, is high SINR link selection high order modulation, is low SINR link selection low-order-modulated;
Step 304: judged whether that transmitting antenna is operated in the saturation emission power district.Determination methods: to every kind of modulation system, NodeB knows in advance and obtains the required minimum Signal to Interference plus Noise Ratio SINR of target QoS t, NodeB is according to the result of AMC so, and the feedback information of UE (travelling carriage), if the SINR of feedback c＞SINR t, judge that so this transmitting antenna is operated in saturation emission power district.If there is transmitting antenna to be operated in saturation emission power district, then execution in step 305; If do not have, then withdraw from;
Step 305: the number of transmit antennas that is operated in saturation emission power district is Nu;
Step 306: judged whether that transmitting antenna is operated in unsaturation transmitting power district.Determination methods: to every kind of modulation system, NodeB knows in advance and obtains the required minimum Signal to Interference plus Noise Ratio SINR of target QoS t, NodeB is according to the result of AMC so, and the feedback information of UE, if the SINR of feedback c＜SINR t, judge that so this transmitting antenna is operated in unsaturation transmitting power district.If there is transmitting antenna to be operated in unsaturation transmitting power district, then execution in step 307; If do not have, then withdraw from;
Step 307: the number of transmit antennas that is operated in unsaturation transmitting power district is Nd;
Step 308: the transmitting power that will be in all transmitting antennas in the saturation emission power district is downwards &p (power adjustment step pitch) downwards separately;
Step 309: for the transmitting power that is in all transmitting antennas in the unsaturation transmitting power district increases Nu*&p/Nd separately;
Step 310:UE is that every transmit antennas is measured the SINR that receives signal again, and feeds back to NodeB; Get back to step 304, up to EP (end of program).
By on can know that the present invention has following advantage:
1) on the basis that former PARC constant power distributes, increased power reallocation according to modulation system;
2) a kind of reassignment method of dump power has been proposed;
3) with the comparison of former PARC: do not influence the message transmission rate that PARC obtains, but had increased access to the raising of transmission performance, reduced interference with rational complexity.
Below, set forth the employing effect that the present invention brought in detail in conjunction with instantiation to advantage of the present invention:
1, at first, power distribution method can be a lot, and different application scenes has diverse ways.The present invention has proposed a kind of saturation power distribution method of carrying out according to different modulation coding modes on the basis of prior art " every day wire rate control (PARC) " so, and this is a kind of saturated or method that dump power is distributed.Core is the reallocation of dump power " saturated or ".
What 2, in fact this saturation power distribution method was accomplished is the distribution to dump power.The background that saturation power occurs (is the example explanation with 2 transmit antennas): suppose that constant power distributes under the emission situation; The SINR=10.2dB of transmitting antenna A, the SINR=11.9dB of transmitting antenna B is so according to PARC; NodeB can select the QPSK modulation for transmitting antenna A, for B selects the 16QAM modulation.Suppose that receiver needs BER=10 -4Transmission performance; The QPSK modulation transmissions only needs SINR=8.2dB just to satisfy the QoS demand of system so; And the link of 16QAM modulation needs SINR=14.3dB could satisfy the QoS transmission demand of system; Like this, the transmitting power of link A just has residue or occurs saturatedly, is reflected on the SINR residue; And the transmitting power of link B is not enough, is reflected on the deficiency of SINR; The basic reason that this problem occurs is: the exponent number of modulation disperses, and transmitting power or performance are continuous or granularity is very little.Therefore, here residue or saturation power are meant that those are in the unnecessary transmitting power on the minimum emissive power that obtains target QoS and need.To this problem; The present invention can be according to the result of Adaptive Modulation and Coding; And the system QoS demand, and the corresponding relation of different modulating mode and target QoS, SINR demand carries out the balance of transmitting power between the transmitting power of different transmit antennas; Make the transmission of every link satisfy the system QoS demand as possible, and don't the waste transmitting power is disturbed with producing.In other words, make every antenna all use the minimum emissive power that obtains target QoS and need to launch as possible.
In addition; Say from optimized angle; The purpose that reaches PARC or the inventive method can adopt link circuit self-adapting lift-off technologies such as self adaptation AMC, emission precoding fully, but these technology in best performance, high complexity has temporarily stoped its use with time-delay.But this paper proposes method or parc technology on complexity and performance, more meets the requirement of present stage real system.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.

Claims (7)

  1. One kind every day the wire rate control method, it is characterized in that, comprise the steps:
    Step 1, the base station obtains the Signal to Interference plus Noise Ratio of different transmit antennas according to the feedback information of travelling carriage, and confirms modulation and the coded system that every transmit antennas adopts according to said Signal to Interference plus Noise Ratio;
    Step 2, according to the corresponding relation of the Signal to Interference plus Noise Ratio of every antenna, the modulation of being adopted and coded system and destination service quality assurance, between the distinct transmit antenna, carry out the balance of transmitting power: concrete grammar is following:
    Step c according to the selected modulation system of transmitting antenna, confirms that transmitting antenna will obtain the required minimum Signal to Interference plus Noise Ratio of destination service quality assurance;
    Steps d is if the current Signal to Interference plus Noise Ratio of transmitting antenna, confirms then that said transmitting antenna is operated in the saturation emission power district greater than said minimum Signal to Interference plus Noise Ratio, if be not operated in the transmitting antenna in the saturation emission power district, then process ends;
    Step e is if the current Signal to Interference plus Noise Ratio of transmitting antenna, confirms then that said transmitting antenna is operated in the unsaturation transmitting power district less than said minimum Signal to Interference plus Noise Ratio, if be not operated in the transmitting antenna in the unsaturation transmitting power district, then process ends.
  2. 2. method according to claim 1; It is characterized in that; In said step 2; The balance of carrying out transmitting power between said distinct transmit antenna comprises: the balance that realizes said transmitting power through following mode: under the constraints of total transmitting power; The transmitting antenna that obtains the destination service quality assurance is adopted to obtain the minimum emissive power of said destination service quality assurance, and the transmit power allocations that will have more than needed out is given the transmitting antenna that does not also obtain the destination service quality assurance.
  3. 3. method according to claim 1 is characterized in that, said step 1 comprises:
    Step a, the mode that the base station adopts constant power to distribute is launched one group of antenna orthogonal pilot signal, and receiver is measured the Signal to Interference plus Noise Ratio of the reception signal of corresponding transmitting antenna, and feeds back to the base station;
    Step b, adaptive modulation and coding is carried out according to the Signal to Interference plus Noise Ratio of different transmit antennas in the base station, is the high emitting antenna selecting high order modulation of Signal to Interference plus Noise Ratio, is the low emitting antenna selecting low-order-modulated of Signal to Interference plus Noise Ratio.
  4. 4. according to claim 2 or 3 described methods, it is characterized in that after said step e, said step 2 also comprises:
    Step f, the transmitting power that will be in all transmitting antennas in the saturation emission power district is adjusted a downward modulation step pitch separately downwards;
    Step g; The transmitting power that will be in all transmitting antennas in the unsaturation transmitting power district adjusts upward one separately and raises step pitch; Said rise step pitch is calculated through following formula: k=Nu*&p/Nd, and wherein k is for raising step pitch, and Nu is the number that is in all transmitting antennas in the saturation emission power district; &p is the downward modulation step pitch, and Nd is in the number of all transmitting antennas in the unsaturation transmitting power district;
    Step g is that every transmit antennas is measured the Signal to Interference plus Noise Ratio that receives signal again, and feeds back to the base station, returns step e.
  5. One kind every day the wire rate control system, comprise the base station, it is characterized in that, also comprise the control device of transmitting power;
    Said base station obtains the Signal to Interference plus Noise Ratio of different transmit antennas according to the feedback information of travelling carriage, and confirms modulation and the coded system that every transmit antennas adopts according to said Signal to Interference plus Noise Ratio;
    Said control device is used for, and according to the corresponding relation of the Signal to Interference plus Noise Ratio of every antenna, the modulation of being adopted and coded system and destination service quality assurance, between the distinct transmit antenna, carries out the balance of transmitting power; And
    Said control device also is used for: according to the selected modulation system of transmitting antenna, confirm that transmitting antenna will obtain the required minimum Signal to Interference plus Noise Ratio of destination service quality assurance; If the current Signal to Interference plus Noise Ratio of transmitting antenna, confirms then that said transmitting antenna is operated in the saturation emission power district greater than said minimum Signal to Interference plus Noise Ratio, if be not operated in the transmitting antenna in the saturation emission power district, then process ends; If the current Signal to Interference plus Noise Ratio of transmitting antenna, confirms then that said transmitting antenna is operated in the unsaturation transmitting power district less than said minimum Signal to Interference plus Noise Ratio, if be not operated in the transmitting antenna in the unsaturation transmitting power district, then process ends.
  6. 6. system according to claim 5; It is characterized in that; Under the constraints of total transmitting power; Said control device adopts the transmitting antenna that obtains the destination service quality assurance can obtain the minimum emissive power of said destination service quality assurance, and the transmit power allocations that will have more than needed out is given the transmitting antenna that does not also obtain the destination service quality assurance.
  7. One kind every day the wire rate control device, it is characterized in that, comprising:
    Minimum Signal to Interference plus Noise Ratio determination module; Be used for: the base station obtains the Signal to Interference plus Noise Ratio of different transmit antennas and confirmed modulation that every transmit antennas adopted and coded system according to the feedback information of travelling carriage after; According to the selected modulation system of transmitting antenna, confirm that transmitting antenna will obtain the required minimum Signal to Interference plus Noise Ratio of destination service quality assurance;
    Saturation emission power judge module; Be used to carry out: if the current Signal to Interference plus Noise Ratio of transmitting antenna is greater than said minimum Signal to Interference plus Noise Ratio as judging; Confirm that then said transmitting antenna is operated in the saturation emission power district; If be not operated in the transmitting antenna in the saturation emission power district, then finish power control;
    Unsaturation transmitting power judge module; Be used to carry out: if the current Signal to Interference plus Noise Ratio of transmitting antenna is less than said minimum Signal to Interference plus Noise Ratio as judging; Confirm that then said transmitting antenna is operated in the unsaturation transmitting power district; If be not operated in the transmitting antenna in the unsaturation transmitting power district, then finish power control;
    The saturation emission power regulation module is used for: the transmitting power that will be in all transmitting antennas in the saturation emission power district is adjusted a downward modulation step pitch separately downwards;
    Unsaturation transmitting power adjusting module; Be used for: the transmitting power that will be in all transmitting antennas in the unsaturation transmitting power district adjusts upward one separately and raises step pitch; Said rise step pitch is calculated through following formula: k=Nu*&p/Nd, and wherein k is for raising step pitch, and Nu is the number that is in all transmitting antennas in the saturation emission power district; &p is the downward modulation step pitch, and Nd is in the number of all transmitting antennas in the unsaturation transmitting power district;
    The circulation module is used for: obtain the Signal to Interference plus Noise Ratio of the every transmit antennas that remeasures, and send to said saturation emission power judge module and said unsaturation transmitting power judge module.
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CN101741488B (en) * 2010-01-29 2014-05-07 华为技术有限公司 Time-division system-based link adaptive method and device
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CN103634839B (en) * 2012-08-24 2017-06-20 ***通信集团公司 Metrical information reports, adjusts method, the apparatus and system of multichannel imbalance passage

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