CN103369651A - Method for allocating downlink transmission power in long-term evolution system and device thereof - Google Patents
Method for allocating downlink transmission power in long-term evolution system and device thereof Download PDFInfo
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- CN103369651A CN103369651A CN2012100881005A CN201210088100A CN103369651A CN 103369651 A CN103369651 A CN 103369651A CN 2012100881005 A CN2012100881005 A CN 2012100881005A CN 201210088100 A CN201210088100 A CN 201210088100A CN 103369651 A CN103369651 A CN 103369651A
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Abstract
The invention discloses a method for allocating downlink transmission power in a long-term evolution system and a device thereof. The method comprises the following steps of: (1) according to a known narrowband interference band, determining a set u of resource elements (REs) which are corresponding to the current downlink control channel to be transmitted and are interfered by narrowband interference, and (2) when carrying out downlink transmission allocation, allocating downlink transmission total power in other REs excluding the interfered REs in the current downlink control channel to be transmitted. According to the method and the device, through the known narrowband interference band, the transmission power allocation of an LTE downlink control channel is determined. The above scheme shows that the elements in the set u are obtained through calculation, the transmission power of downlink power control is adjusted according to the elements in the set u, the power waste is avoided, and the performance of the downlink control channel is effectively improved.
Description
Technical field
The present invention relates to wireless communication system, relate in particular to method and the device of allocation of downlink transmitting power among the LTE (Long Term Evolution, Long Term Evolution).
Background technology
The LTE project is 3G (3rd-Generation, the 3G (Third Generation) Moblie technology) evolution, it improves and has strengthened the aerial access technology of 3G, adopt OFDM (Orthogonal Frequency Division Multiplexing, OFDM) and MIMO (Multiple-Input Multiple-Output, multiple-input and multiple-output) as the standard of its wireless network evolution.The peak rate of descending 326Mbit/s and up 86Mbit/s can be provided under the 20MHz spectral bandwidth, improve the performance of Cell Edge User, improve cell capacity and reduced system delay.
The downlink transfer resource particle is expressed as RE (Resource Element, resource particle) in the LTE system, and it carries out uniquely tagged by index to (k, l), is illustrated respectively in the sequence number of frequency-domain and time-domain; Wherein,
The number that represents descending RB (Resource Block, Resource Block),
Represent the number of sub carrier wave above the RB,
Represent descending OFDM symbolic number.Also define REG (Resource Element Group, resource grains subgroup) in the LTE system and be used for the expression control channel to the mapping of RE, can comprise a plurality of RE among the REG.
PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) carrying dispatching distribution and other control information, a physical control channel is at one or more CCE (Control Channel Element, the control channel particle) upper transmission, the wherein set of the corresponding RE of each CCE.In the LTE system, CCE is from 0 open numbering.
OFDM symbol numbers (1,2 or the 3) information that is used for the PDCCH transmission in subframe of PCFICH (Physical Control Format Indictor Channel, Physical Control Format Indicator Channel) carrying.LTE the PCFICH modulation intelligence according to the Sequential Mapping that increases order in the descending sub frame on 4 resource grains subgroups in first OFDM symbol.
HARQ (Hybrid Automatic Repeat Request, the mixed automatic retransfer request) ACK (affirmation)/NACK (denying) is by PHICH (Physical HARQ Indictor Channel, Physical HARQ Indicator Channel) carrying.A plurality of PHICH are mapped on the identical RE, form the PHICH group, and the PHICH that wherein is arranged in same group distinguishes by different orthogonal sequences.The PHICH resource is by the sequence number group
Represent, wherein,
Expression PHICH group sequence number,
Orthogonal sequence sequence number in the expression group.
The LTE down control channel has comprised PDCCH, PCFICH and PHICH, and its power division can be carried out above the RE at each, and the power summation of all RE can not surpass total transmitting power.
When the LTE downlink network existed fixing arrowband to disturb, this interference meeting exerted an influence to down control channel.If still distribute this time power can cause waste on the power.
Summary of the invention
The technical problem to be solved in the present invention provides method and the device of allocation of downlink transmitting power in a kind of long evolving system, to overcome to have now the problem of the descending power waste that brings when carrying out the power division of down control channel is being arranged under the arrowband interference.
For addressing the above problem, the present invention also provides the method for allocation of downlink transmitting power in a kind of long evolving system, comprising:
According to known arrowband interference band, determine the set u of the corresponding resource particle of down control channel current to be sent (RE) that this arrowband interferes with;
Divide timing carrying out descending power, with the downlink gross power in described current down control channel to be sent except disturbed to RE other RE in distribute.
Further, described method also comprises:
Divide timing carrying out descending power, the down transmitting power of each RE among the set u is set to 0.
Further,
Described with the downlink gross power in described current down control channel to be sent except disturbed to RE other RE in distribute, specifically comprise:
With the downlink gross power in described current down control channel to be sent except disturbed to RE other RE in be distributed equally.
Correspondingly, the present invention also provides the device of allocation of downlink transmitting power in a kind of long evolving system, comprising:
Disturb determining unit, be used for according to known arrowband interference band, determine the set u of the corresponding resource particle of down control channel current to be sent (RE) that this arrowband interferes with;
Power distributing unit is used for dividing timing carrying out descending power, with the downlink gross power in described current down control channel to be sent except disturbed to RE other RE in distribute.
Further,
Described power distributing unit also is used for dividing timing carrying out descending power, and the down transmitting power of each RE among the set u is set to 0.
Further,
Described power distributing unit be used for the downlink gross power described current down control channel to be sent except disturbed to RE other RE in distribute, specifically comprise:
Described power distributing unit be used for the downlink gross power described current down control channel to be sent except disturbed to RE other RE in be distributed equally.
The present invention determines the transmit power allocations of LTE down control channel by known arrowband interference band.Find out from such scheme, by calculating the element among the set u, according to the transmitting power that the unit of set u usually adjusts downlink power control, avoided power dissipation, and effectively raised the performance of down control channel among the present invention.
Description of drawings
Fig. 1 is the method flow diagram of allocation of downlink transmitting power in the medium-term and long-term evolution system of the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, hereinafter in connection with accompanying drawing embodiments of the invention are elaborated.Need to prove, in the situation that do not conflict, the embodiment among the application and the feature among the embodiment be combination in any mutually.
The method that descending power distributes in a kind of long evolving system can be applicable to (such as eNB) on the network equipment, as shown in Figure 1, comprising:
1 disturbs the frequency domain position at place to obtain it according to the arrowband disturbs corresponding RE numbering, and the set of formation is b ∈ { b
1... b
j, wherein, the size of j is relevant with the bandwidth that the arrowband disturbs;
The set of the down control channel RE that 2 hypothesis current times are to be sent is s ∈ { s
1, s
2S
i, i is subcarrier number, span is i=1 ... m, m and current time control channel to be sent is relevant.The initial power allocation scheme of RE set s is
Wherein, k
iBe i the power that down control channel distributes, p is the maximum power that current sign can be launched;
The common factor of 3 Assumption set b and s is u.Judge whether set u is empty set, if it is keeps power division constant, and power division finishes; Otherwise execution in step 4;
RE power corresponding to element sets to 0 among 4 set u, will distribute between the gross power RE that other element the element is corresponding in set u in set s, and more preferably, this method of salary distribution can adopt mean allocation, that is: the power of other RE is set to
Wherein l is the number of element among the set u, and n deducts the element number that comprises among the set u for the element number that comprises among the set s.
In order to further specify the present invention, be elaborated below in conjunction with embodiment.
Suppose that the LTE system bandwidth is 5M, it is 1 RB that the arrowband disturbs, and frequency domain position is 0.
1. the RE numbering set b that calculates the correspondence of disturbing by the arrowband be 0,1 ... 11};
2. the RE set of the control channel of current downlink sub-carrier transmission is:
s∈{0，1，2，3，4，5，72，73，74，75，76，77，150，151，152，153，154，155，222，223，224，225，226，227}，
Down transmitting power p is 1 watt, and then the transmitting power of each original allocation above the subcarrier is 0.0416 watt.
The common factor of set b and s be u ∈ 0,1,2,3,4,5}, u gathers non-NULL, execution in step 4;
4. { transmitting power on 0,1,2,3,4, the 5} sets to 0, and the transmitting power on other subcarrier is 0.0416* (1+6/ (24-6))=0.0555 watt subcarrier.Then the last transmit power allocations of current time control channel is { 0,0,0,0,0,0,0.0555,0.0555,0.0555,0.0555,0.0555,0.0555,0.0555,0.0555,0.0555,0.0555,0.0555,0.0555,0.0555,0.0555,0.0555,0.0555,0.0555,0.0555} watt
In addition, in the present embodiment, the device of allocation of downlink transmitting power in a kind of long evolving system comprises:
Disturb determining unit, be used for according to known arrowband interference band, determine the set u of the corresponding resource particle of down control channel current to be sent (RE) that this arrowband interferes with;
Power distributing unit is used for dividing timing carrying out descending power, with the downlink gross power in described current down control channel to be sent except disturbed to RE other RE in distribute.
More preferably,
Described power distributing unit also is used for dividing timing carrying out descending power, and the down transmitting power of each RE among the set u is set to 0.
More preferably,
Described power distributing unit be used for the downlink gross power described current down control channel to be sent except disturbed to RE other RE in distribute, specifically comprise:
Described power distributing unit be used for the downlink gross power described current down control channel to be sent except disturbed to RE other RE in be distributed equally.
One of ordinary skill in the art will appreciate that all or part of step in the said method can come the instruction related hardware to finish by program, described program can be stored in the computer-readable recording medium, such as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can realize with one or more integrated circuits.Correspondingly, each the module/unit in above-described embodiment can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
The above is the preferred embodiments of the present invention only, is not for limiting protection scope of the present invention.According to summary of the invention of the present invention; also other various embodiments can be arranged; in the situation that do not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion; within the spirit and principles in the present invention all; any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the method for allocation of downlink transmitting power in the long evolving system comprises:
According to known arrowband interference band, determine the set u of the corresponding resource particle of down control channel current to be sent (RE) that this arrowband interferes with;
Divide timing carrying out descending power, with the downlink gross power in described current down control channel to be sent except disturbed to RE other RE in distribute.
2. the method for claim 1 is characterized in that, also comprises:
Divide timing carrying out descending power, the down transmitting power of each RE among the set u is set to 0.
3. method as claimed in claim 1 or 2 is characterized in that:
Described with the downlink gross power in described current down control channel to be sent except disturbed to RE other RE in distribute, specifically comprise:
With the downlink gross power in described current down control channel to be sent except disturbed to RE other RE in be distributed equally.
4. the device of allocation of downlink transmitting power in the long evolving system comprises:
Disturb determining unit, be used for according to known arrowband interference band, determine the set u of the corresponding resource particle of down control channel current to be sent (RE) that this arrowband interferes with;
Power distributing unit is used for dividing timing carrying out descending power, with the downlink gross power in described current down control channel to be sent except disturbed to RE other RE in distribute.
5. device as claimed in claim 4 is characterized in that:
Described power distributing unit also is used for dividing timing carrying out descending power, and the down transmitting power of each RE among the set u is set to 0.
6. such as claim 4 or 5 described devices, it is characterized in that:
Described power distributing unit be used for the downlink gross power described current down control channel to be sent except disturbed to RE other RE in distribute, specifically comprise:
Described power distributing unit be used for the downlink gross power described current down control channel to be sent except disturbed to RE other RE in be distributed equally.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104411005A (en) * | 2014-11-05 | 2015-03-11 | 大唐移动通信设备有限公司 | Uplink transmission power control method, device and base station |
| WO2016134525A1 (en) * | 2015-02-27 | 2016-09-01 | 富士通株式会社 | Information transmission method and apparatus, and communication system |
| CN106792924A (en) * | 2015-11-23 | 2017-05-31 | 大唐移动通信设备有限公司 | A kind of resource allocation methods and equipment |
| CN111162884A (en) * | 2018-11-07 | 2020-05-15 | 中国电信股份有限公司 | Channel optimization method and device |
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| CN101472323A (en) * | 2007-12-26 | 2009-07-01 | 华为技术有限公司 | Method, system and device for distributing down control channel |
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| CN101179285A (en) * | 2007-11-27 | 2008-05-14 | 哈尔滨工程大学 | Sideband related replacement method for inhibiting narrow-band interference |
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| CN104411005A (en) * | 2014-11-05 | 2015-03-11 | 大唐移动通信设备有限公司 | Uplink transmission power control method, device and base station |
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| WO2016134525A1 (en) * | 2015-02-27 | 2016-09-01 | 富士通株式会社 | Information transmission method and apparatus, and communication system |
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| CN111162884A (en) * | 2018-11-07 | 2020-05-15 | 中国电信股份有限公司 | Channel optimization method and device |
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