CN101719862B - Method and device for acquiring uplink/downlink wireless covered space in LTE system - Google Patents
Method and device for acquiring uplink/downlink wireless covered space in LTE system Download PDFInfo
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- CN101719862B CN101719862B CN2008101618595A CN200810161859A CN101719862B CN 101719862 B CN101719862 B CN 101719862B CN 2008101618595 A CN2008101618595 A CN 2008101618595A CN 200810161859 A CN200810161859 A CN 200810161859A CN 101719862 B CN101719862 B CN 101719862B
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Abstract
The invention discloses a method and a device for acquiring uplink/downlink wireless covered space in a LTE system. The method comprise the following steps of: firstly, confirming the SINR (Signal-to-Interference and Noise Ratio) of user equipment located in periphery of a district according to predetermined factors, wherein the predetermined factors comprise media access control MAN level velocity of the user equipment, resource block quantity allocated for the user equipment, and overhead of all uplink/downlink information channels; then confirming sensitivity of a receiver at a receiving side according to the resource block quantity and the SINR; confirming uplink/downlink path loss according to transmission power, a power back-off value, the receiver sensitivity, interference allowance and receiver antenna gain of a transmission terminal; finally, confirming the uplink/downlink wireless coverage distance according the path loss. The technical scheme provided by the invention is suitable for programming a large scale LTE network, and can enhance network programming efficiency.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to the acquisition methods and the device of the up/descending wireless coverage distance of a kind of LTE system.
Background technology
Long Term Evolution (Long Term Evolution abbreviates LTE as) system and existing third generation mobile gpp (3
RdGeneration Partnership Project abbreviates 3GPP as) R6, R7 system configuration on a great difference is arranged, LTE is tending towards flattening on whole system; Reduced intermediate node quantity, therefore, with existing universal land radio access web (Universal Terrestrial Radio Access Network; Abbreviate UTRAN as) compare; The interface of LTE system reduces, and has reduced cost, and has been easier to equipment is carried out maintenance management; And, on performance, can also reduce the delay of transfer of data.The purpose that LTE mainly realizes is for the user is provided: higher data rate, higher cell capacity, lower time of delay, reduce the cost of user and operator.
Descending employing OFDM (the Orthogonal Frequency DivisionMultiplexing of LTE; Abbreviating OFDM as) technology provides the spectrum efficiency and the ability of enhancing; Up based on single carrier frequency division multiplexing (Single Carrier Frequency Division MultipleAccess abbreviates SC-FDMA as).The subcarrier width of OFDM and SC-FDMA is 15kHz, adopts this parameter value, can take into account system effectiveness and mobility.The LTE system all supports orthogonal PSK (Quadrature Phase ShiftKeying in up link and down link; Abbreviate QPSK as), 16 quadrature amplitude modulation (16Quadrature AmplitudeModulation abbreviates 16QAM as) and three kinds of modulation techniques of 64QAM.And the LTE system also comprises mode of frequency division duplexing (Frequency division duplex abbreviates FDD as) and two kinds of duplex modes of TDD mode (Time division duplex abbreviates TDD as).
Other key technology in the LTE system is a multi-antenna technology.This technology is meant and adopts descending multiple-input and multiple-output (Multiple Input Multiple Output antennas abbreviates MIMO as) and transmit diversity (Tx diversity).The most basic multi-antenna technology configuration of LTE is the two 2*2 antenna configurations of sending out two receipts of descending employing; The 1*2 antenna configurations of up employing single-emission and double-receiving, the peak demand that the following stage is considered is antenna configurations or four two 4*2 antenna configurations of receiving that downlink mimo and antenna diversity are supported four four 4*4 that receive.
The basic principle of LTE wireless access is the shared channel transmission on DSCH Downlink Shared Channel (Downlink SharedChannel abbreviates DL_SCH as) and the Uplink Shared Channel (Uplink Shared Channel abbreviates UL_SCH as).Time-frequency resources is dynamically to share in the uplink and downlink direction of different user.Insert (WidebandCode Division Multiple Access with WCDMA; WCDMA) the two-forty binding inserts (HighSpeed Package Access; Abbreviating HSPA as) technology type is seemingly; When wireless network is planned, must consider the influence of resource allocation to covering design.
Similar with the ascending performance of WCDMA HSPA, in the up covering design of LTE, need the influence of the back-off of the up peak-to-average force ratio generation of consideration.In addition, in the R8 stage of standard formulation at present, up multiuser MIMO (Multiple UserMIMO the abbreviates MU-MIMO as) mode that can adopt of LTE promotes throughput, therefore, also need consider the influence of this mode to ascending performance.
At present; Usually adopt system simulation method to calculate the up coverage distance of LTE; In the method, in the computer system simulation system, the no line model of LTE, user model, dispatching algorithm model, resource allocation algorithm etc. are carried out modeling, obtain the covering performance of LTE system through Computer Simulation.Though the covering result that this system emulation mode obtains is very reliable; For example; Complex space multiplex techniques such as MIMO are played good dissection, but because system emulation mode speed of service characteristics slow, that simulation modeling is complicated make this method not be suitable for extensive LTE network planning demand.
Summary of the invention
In view of this, the invention provides the acquisition methods and the device of the up/descending coverage distance of a kind of LTE FDD/TDD system,, avoid the use of system simulation method and make large-scale LTE network design in order to solve the covering design problem in the LTE network planning.
The acquisition methods of the up/descending wireless coverage distance of a kind of LTE system is provided according to an aspect of the present invention.
Acquisition methods according to the up/descending wireless coverage distance of LTE of the present invention system comprises: the Signal to Interference plus Noise Ratio of confirming to be positioned at the subscriber equipment of cell edge according to predetermined factors; Wherein, above-mentioned predetermined factors comprises: the media access control MAC layer speed of subscriber equipment, be the expense of the Resource Block quantity of user device configuration, up/descending each channel; According to Resource Block quantity and Signal to Interference plus Noise Ratio, confirm the receiver sensitivity of receiver side then; According to transmitted power, back-off value, receiver sensitivity, interference margins and the receiver antenna gain of transmitting terminal, confirm up/descending path loss again; According to path loss, confirm up/descending wireless coverage distance at last.
The deriving means of the up/descending wireless coverage distance of a kind of LTE system is provided according to another aspect of the present invention.
Deriving means according to the up/descending wireless coverage distance of LTE of the present invention system comprises: first determination module, second determination module, the 3rd determination module and the 4th determination module.Wherein, First determination module is used for confirming to be positioned at according to predetermined factors the Signal to Interference plus Noise Ratio of the subscriber equipment of cell edge; Wherein, above-mentioned predetermined factors comprises: the media access control MAC layer speed of subscriber equipment, be the expense of the Resource Block quantity of user device configuration, up/descending each channel; Second determination module is used for confirming the receiver sensitivity of receiver side according to Resource Block quantity and the definite Signal to Interference plus Noise Ratio of first determination module; The 3rd determination module is used for transmitted power, back-off value, receiver sensitivity, interference margins and the receiver antenna gain according to transmitting terminal, confirms up/descending path loss; The 4th determination module is used for the path loss definite according to the 3rd determination module, confirms up/descending wireless coverage distance.
Through technique scheme of the present invention; Medium access control system (Media Access Control abbreviates MAC as) the layer speed of the subscriber equipment through being positioned at cell edge and be the Resource Block of this user device configuration (Resource Block abbreviates RB as) number; Confirm Signal to Interference plus Noise Ratio (Signal Interference Noise Ratio; Abbreviate SINR as), and utilize this SINR and RB number to confirm the receiver sensitivity of receiver side, obtain the distance of up/descending wireless coverage at last; The huge workload and the time loss of system emulation mode have been avoided adopting; The budget flexible method is quick, is applicable to the planning of large-scale LTE network, has improved the efficient of the network planning.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the acquisition methods of the up/descending wireless coverage distance of the LTE system of the embodiment of the invention;
Fig. 2 is the implementing procedure figure of embodiment one;
Fig. 3 is the implementing procedure figure of embodiment two;
Fig. 4 is the structured flowchart according to the deriving means of the up/descending wireless coverage distance of the LTE system of the embodiment of the invention.
Embodiment
Functional overview
As stated; The present invention is directed to existing emulation technology and be not suitable for the demand of the extensive LTE network planning; The acquisition methods of the up/descending wireless coverage distance of a kind of LTE system has been proposed; In the method, the MAC layer speed of the subscriber equipment through being positioned at cell edge and be this user device configuration RB number is confirmed SINR; And utilize this SINR and RB number to confirm the receiver sensitivity of receiver side; Take all factors into consideration factors such as MIMO or receive diversity are made an uproar at the bottom of to the gain of Uplink/Downlink, receiver, the gain of interference coordination algorithm simultaneously, calculate up/descending path loss, the covering design budget mode through routine calculates the up coverage distance of LTE then.
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
According to the embodiment of the invention, the acquisition methods of the up/descending wireless coverage distance of a kind of LTE system is provided at first.
Fig. 1 is the flow chart according to the acquisition methods of the up/descending wireless coverage distance of the LTE system of the embodiment of the invention; As shown in Figure 1, mainly comprise following processing (step S101-step S107) according to the acquisition methods of the up/descending wireless coverage distance of the LTE system of the embodiment of the invention:
Step S101: confirm to be positioned at the SINR of the subscriber equipment of cell edge according to predetermined factors, wherein, this predetermined factors comprises: the MAC layer speed of this subscriber equipment, be the expense ratio of the RB quantity of this user device configuration and up/descending each channel;
Step S103:, confirm the receiver sensitivity of receiver side according to above-mentioned RB quantity and SINR;
Step S105:, confirm up/descending path loss according to transmitted power, back-off value, receiver sensitivity, interference margins and the receiver antenna gain of transmitting terminal;
Step S107:, confirm up/descending wireless coverage distance according to the path loss that step S105 confirms.
Below further describe above-mentioned each details of handling.
(1) step S101
In the practical implementation process, step S101 can specifically may further comprise the steps:
Step 1:, confirm to be positioned at the MAC layer speed of the subscriber equipment of cell edge according to up/descending coverage goal;
Particularly,, obtain the customer service speed of the subscriber equipment that is positioned at cell edge,, then confirmed to be positioned at the MAC layer speed of the subscriber equipment of cell edge if this customer service speed is MAC layer speed according to up/descending coverage goal; Otherwise, customer service speed conversion is MAC layer speed, for example,, then need consider the expense ratio of RLC to MAC if this customer service speed is RLC speed, the speed of deducting after this ratio is MAC layer speed.
Step 2:, be the spendable RB quantity of user device configuration according to the type of service of subscriber equipment;
Type of service particularly,, can dispose its spendable RB number, for example,, then dispose 2 RB, if can dispose maximum RB number for full buffer if type of service is Voip according to the type of service of Cell Edge User equipment.
Step 3:, obtain the expense ratio of each channel according to up/downlink system bandwidth of operation;
According to the bandwidth of operation of up/downlink system, can shine upon the expense ratio that obtains each channel, and can count the overhead ratio.And; When the RB number that distributes in the step 2 during less than preset threshold (such as 5); The overhead scale is set among reference signal (Reference Signal abbreviates RS as) expense ratio and uplink detection reference signal (Sounding RS abbreviates SRS as) the expense ratio.
Step 4:, obtain SINR according to MAC layer speed, RB quantity and expense ratio.
Particularly; Can be according to step 1 and definite MAC layer speed and the RB quantity of step 2; Calculate each RB and go up to need carry transmission block size (Transport Block Size abbreviates TBSize as), and the TBSize that the calculates up/descending expense ratio in the deduction step 3.And, need judge also whether up/uplink/downlink antenna configuration is MIMO (MU-MIMO or SU-MIMO, i.e. multiuser MIMO or Single User MIMO); If; Then can obtain the current wireless environment grade of this subscriber equipment, then, utilize this wireless environment grade that above-mentioned TBSize is revised through the mode of system emulation; Otherwise, directly utilize deduction expense percentage of T BSize to carry out subsequent operation.
After obtaining final TBSize,, obtain the SINR value corresponding with the TBSize that revises according to TBSize that is provided with in advance and the corresponding relation of SINR.Particularly, TBSize that is provided with in advance and the corresponding relation of SINR can be expressed by link curve.
(2) step S103
The receiver sensitivity of receiver side is by two parameter determining, promptly make an uproar at the bottom of the receiver size and SINR, and therefore, step S103 can specifically comprise following two steps:
Step 1:, obtain this subscriber equipment size of at the bottom of the receiver of receiver side, making an uproar according to the RB number that is above-mentioned user device configuration.
Form because each RB of LTE system is 12 number of sub-carrier, each subcarrier is 15KHz, so each RB is the 180KHz bandwidth.If this user equipment allocation N RB, the thermal noise that then in the receiver of receiver side, produces can obtain through the bandwidth integrates at 180KHz * N.
Step 2: through the size of making an uproar at the bottom of the above-mentioned receiver is deducted above-mentioned SINR, obtain receiver sensitivity, promptly make an uproar at the bottom of receiver sensitivity=receiver-the SINR value.
(3) step S105
Particularly, the transmitted power of path loss Pathloss=transmitting terminal-back-off value-receiver sensitivity-interference margins+receiver antenna gain+other decay or gain.Wherein, the transmitted power of transmitting terminal can directly be obtained; For up, can confirm that single carrier orthogonal frequency division multiplexing (Single CarrierOrthogonal Frequency Division Multiple Access abbreviates SC-OFDMA as) sends the back-off value that peak-to-average force ratio causes through system emulation; And receiver antenna gain can be confirmed according to the type (such as MIMO or receive diversity) of up/uplink/downlink antenna configuration; And, confirm the numerical value of the gain or the decay of each link of up link, thereby the path loss of calculating through conventional link budget mode.
(4) step S107
The processing of step S107 can be adopted conventional budget method, path loss is changed into up/descending wireless coverage distance.
Through the said method that the embodiment of the invention provides, can flexibly and fast and guarantee calculating of certain accuracy up/descending wireless coverage distance.
Below respectively with two kinds of situation of uplink and downlink, the practical implementation process of the said method that the embodiment of the invention is provided is described in detail.
Embodiment one
The above behavior of present embodiment example is calculated the up-link wireless coverage distance of LTE system and is described to the acquisition methods that utilizes the wireless coverage distance that the embodiment of the invention provides.
Fig. 2 is the implementing procedure figure of present embodiment, and is as shown in Figure 2, mainly may further comprise the steps:
Step S201: according to the up coverage goal of LTE, confirm to be positioned at the uplink service speed of the subscriber equipment of cell edge, judge whether this uplink service speed is MAC layer speed, if execution in step S203 then, otherwise execution in step S202;
Step S202: the conversion of uplink service speed is MAC layer speed.For example; If step S201 is a RLC speed, then need consider RLC to MAC expense ratio, the speed of deducting after this ratio is MAC layer speed; Can convert according to MAC layer speed and to obtain the TBsize size within every time slot (Transmission Time Interval abbreviates TTI as);
Step S203: according to its available RB number of type of service configuration of edge customer equipment, for example, and 2 RB of Voip business configuration, full buffer business can dispose maximum RB number;
Step S204: calculate LTE up channel expense ratios such as RS/SRS/RACH/PUCCH according to the system works band bandwidth, and statistics overhead ratio;
Step S205: whether the RB number that determining step S203 confirms less than given threshold value (for example 5 RB), if, execution in step S206 then, otherwise execution in step S207;
Step S206: the overhead scale among the step S204 is set to RS expense ratio and SRS expense ratio sum, does not promptly consider the take situation of up channel expenses such as RACH/PUCCH to resource;
Step S207: judge whether system adopts the MU-MIMO double-stream mode to carry out uplink, if, execution in step S208 then, otherwise execution in step S209;
Step S208: the MAC layer rate requirement of confirming among the step S201/202 reduced, confirm that through the wireless environment of system emulation this subscriber equipment is in empty the branch on the lower tributary of channel grade, on the perhaps higher tributary.Grade reduces the MAC layer rate requirement of confirming among the step S201/202 in view of the above, promptly converts the MAC layer Tbsize target requirement on single user's single current to the MAC layer speed on the double fluid.If the user is in high-grade situation Tbsize weighting more greatly, on the contrary inferior grade, execution in step S210 afterwards;
Step S209: in link gain, increase Tx Diversity gain 2～3dB (reference value being provided), execution in step S210 afterwards by simulation result;
Step S210: according to the MAC layer speed of confirming among the step S201/202/208 (initial TBsize size); Divided by the expense ratio of confirming among the step S204 (being MAC layer speed/(1-expense ratio)); Obtain the RB number of distribution again divided by this subscriber equipment under confirming among the step S203, promptly obtain each RB and go up the TBsize size that to carry;
Step S211: confirm TBsize value down according to step S210, after the various common signal channels that calculate in deduction step S204～206, the overhead of control channel, look into link-simulation curve, the SINR value of acquisition correspondence, and modulating-coding form.This SINR value is and satisfies up user MAC layer speed, considers that expense takies, considered after the resource allocation, corresponding SINR desired value.Execution in step S212 afterwards;
Above-mentioned steps S201-step S211 is equivalent to the step S101 among Fig. 1.
Step S212: according to the link simulation result, the modulating-coding form that the RB piece that step S203 confirms, step S211 confirm confirms that the rollback value of user uplink transmitted power is big or small, afterwards execution in step S213;
Step S213: the RB number according to step S203 confirms, calculate the thermal noise in these RB resources;
Step S214: confirm the conventional loss (like feeder loss, human body loss, antenna gain, noise factor etc.) on uplink transmission power, the link, calculate the call parameter of up covering link budget designs such as receiver sensitivity;
Above-mentioned steps S212-step S214 is equivalent to the step S103 among Fig. 1.
Step S215: through conventional link budget mode; Confirm the numerical value of the gain or the decay of each link of up link; Utilize the computing formula of above-mentioned path loss; Obtain aerial greatest path loss value, last calculating according to the greatest path loss value of obtaining obtains up coverage distance, and this step is equivalent to step S105 and the step S107 among Fig. 1.
Utilize present embodiment, can obtain the up-link wireless coverage distance of LTE system.
Embodiment two
The following behavior of present embodiment example is calculated the descending wireless coverage distance of LTE system and is described to the acquisition methods that utilizes the wireless coverage distance that the embodiment of the invention provides.
Fig. 3 is the implementing procedure figure of present embodiment, and is as shown in Figure 3, mainly may further comprise the steps:
Step S301: according to the descending coverage goal of LTE, confirm to be positioned at the downlink business speed of the subscriber equipment of cell edge, if this downlink business speed is MAC layer speed, execution in step S303 then, otherwise execution in step S302;
Step S302: the conversion of downlink business speed is MAC layer speed.For example; If step S301 is a RLC speed, then need consider RLC to MAC expense ratio, the speed of deducting after this ratio is MAC layer speed; Can convert according to MAC layer speed and to obtain the TBsize size within every time slot (Transmission Time Interval abbreviates TTI as);
Step S303: according to its available RB number of type of service configuration of edge customer equipment, for example, and 2 RB of Voip business configuration, full buffer business can dispose maximum RB number;
Step S304: calculate LTE down channel expense ratios such as RS/BCH/PDCCH according to the system works band bandwidth, and statistics overhead ratio;
Step S305: whether the RB number that determining step S303 confirms less than given threshold value (for example 5 RB), if, execution in step S306 then, otherwise execution in step S307;
Step S306: the overhead scale among the step S304 be set to RS expense ratio with, promptly do not consider the take situation of down channel expense such as BCH/PDCCH to resource;
Step S307: judge whether system adopts MIMO (comprising MU-MIMO and SU-MIMO) double-stream mode to carry out downlink transfer, if, execution in step S308 then, otherwise execution in step S309;
Step S308: the MAC layer rate requirement of confirming among the step S301/302 reduced,, confirm that through the wireless environment of system emulation this subscriber equipment is in empty the branch on the lower tributary of channel grade, on the perhaps higher tributary.Grade reduces the MAC layer rate requirement of confirming among the step S301/302 in view of the above, promptly converts the MAC layer TBsize target requirement on single user's single current to the MAC layer speed on the double fluid.If the user is in high-grade situation TBsize weighting more greatly, on the contrary inferior grade, execution in step S310 afterwards;
Step S309: in link gain, increase Tx Diversity gain 2～3Db (reference value being provided), execution in step S310 afterwards by simulation result;
Step S310: according to the MAC layer speed of confirming among the step S301/302/308 (initial TBsize size); Divided by the expense ratio of confirming among the step S304 (being MAC layer speed/(1-expense ratio)); Obtain the RB number of distribution again divided by this subscriber equipment under confirming among the step S303, promptly obtain each RB and go up the TBsize size that to carry;
Step S311: confirm TBsize value down according to step S310, after the various common signal channels that calculate in deduction step S304～306, the overhead of control channel, look into link-simulation curve, the SINR value of acquisition correspondence, and modulating-coding form.This SINR value is and satisfies downlink user MAC layer speed, considers that expense takies, considered after the resource allocation, corresponding SINR desired value.Execution in step S312 afterwards;
Above-mentioned steps S301-step S311 is equivalent to the middle step S101 of Fig. 1.
Step S312: according to the link simulation result, the modulating-coding form that the RB piece that step S303 confirms, step S311 confirm confirms that the rollback value of base station down transmitted power is big or small, afterwards execution in step S313;
Step S313: the RB number according to step S303 confirms, calculate the thermal noise in these RB resources;
Step S314: confirm the conventional loss (like feeder loss, human body loss, antenna gain, noise factor etc.) on downlink transmission power, the link, calculate the call parameter of descending covering link budget designs such as receiver sensitivity;
Above-mentioned steps S312-step S314 is equivalent to the step S103 among Fig. 1.
Step S315: through conventional link budget mode, confirm the numerical value of the gain or the decay of each link of down link, obtain aerial greatest path loss value, calculate at last and obtain descending coverage distance, this step is equivalent to step S105 and the step S107 among Fig. 1.
Through present embodiment, can obtain the descending wireless coverage distance of LTE system.
According to the embodiment of the invention, the deriving means of the up/descending wireless coverage distance of a kind of LTE system is provided also.
Fig. 4 is the structured flowchart according to the deriving means of the up/descending wireless coverage distance of the LTE system of the embodiment of the invention; As shown in Figure 4, comprise according to the deriving means of the up/descending wireless coverage distance of the LTE system of the embodiment of the invention: first determination module 41, second determination module 43, the 3rd determination module 45 and the 4th determination module 47.Wherein, First determination module 41; Be used for confirming to be positioned at according to predetermined factors the Signal to Interference plus Noise Ratio of the subscriber equipment of cell edge, wherein, predetermined factors comprises: the media access control MAC layer speed of subscriber equipment, be the expense of the Resource Block quantity of user device configuration, up/descending each channel; Second determination module 43 is connected with first determination module 41, is used for confirming the receiver sensitivity of receiver side according to being the Resource Block quantity of above-mentioned user equipment allocation and the definite Signal to Interference plus Noise Ratio of first determination module 41; The 3rd determination module 45 is connected with second determination module 43, is used for transmitted power, back-off value, receiver sensitivity, interference margins and receiver antenna gain according to transmitting terminal, confirms up/descending path loss; The 4th determination module 47 is connected with the 3rd determination module 45, is used for the path loss confirmed according to the 3rd determination module 45, confirms up/descending wireless coverage distance.
According to the said apparatus of the embodiment of the invention, can flexibly and fast confirm the up/descending wireless coverage distance of LTE system.
As stated; The technical scheme that provides by the embodiment of the invention; The MAC layer speed of the subscriber equipment through being positioned at cell edge and be this user device configuration RB number is confirmed SINR, and is utilized this SINR and RB number to confirm the receiver sensitivity of receiver side; Take all factors into consideration factors such as MIMO or receive diversity are made an uproar at the bottom of to the gain of Uplink/Downlink, receiver, the gain of interference coordination algorithm simultaneously; Calculate up/descending path loss, the covering design budget mode through routine calculates the up coverage distance of LTE then, and a kind of budget method flexibly and fast can be provided; The speed and the efficient of the LTE network planning can be improved, and certain accuracy can be guaranteed.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a LTE system is up/acquisition methods of descending wireless coverage distance, it is characterized in that, and comprising:
Confirm to be positioned at the Signal to Interference plus Noise Ratio of the subscriber equipment of cell edge according to predetermined factors; Wherein, said predetermined factors comprises: the media access control MAC layer speed of said subscriber equipment, be the expense of the Resource Block quantity of said user device configuration, up/descending each channel;
According to said Resource Block quantity and said Signal to Interference plus Noise Ratio, confirm the receiver sensitivity of receiver side;
According to transmitted power, back-off value, said receiver sensitivity, interference margins and the receiver antenna gain of transmitting terminal, confirm up/descending path loss;
According to said path loss, confirm said up/descending wireless coverage distance.
2. method according to claim 1 is characterized in that, said definite Signal to Interference plus Noise Ratio specifically comprises:
According to up/descending coverage goal, confirm the MAC layer speed of said subscriber equipment;
According to the type of service of said subscriber equipment, be the spendable Resource Block quantity of said user device configuration;
According to up/downlink system bandwidth of operation, obtain the expense ratio of each channel;
According to said MAC layer speed, said Resource Block quantity and said expense ratio, obtain said Signal to Interference plus Noise Ratio.
3. method according to claim 2 is characterized in that, the MAC layer speed of said definite said subscriber equipment specifically comprises:
According to up/descending coverage goal, obtain the customer service speed of said subscriber equipment, and if said customer service speed be not MAC layer speed, be MAC layer speed with said customer service rate transition.
4. according to claim 2 or 3 described methods, it is characterized in that,, obtain said Signal to Interference plus Noise Ratio and specifically comprise according to said MAC layer speed, said Resource Block quantity and said expense ratio:
According to said MAC layer speed, said Resource Block quantity and said expense ratio, confirm the transmission block size that each Resource Block carries;
If up/uplink/downlink antenna is configured to multi-user's multiple-input and multiple-output, confirms the wireless environment grade that said subscriber equipment is current, and utilize said wireless environment grade that said transmission block size is revised;
According to the corresponding relation of the transmission block size that is provided with in advance, obtain and the corresponding Signal to Interference plus Noise Ratio of revised said transmission block size with Signal to Interference plus Noise Ratio;
If up/uplink/downlink antenna configuration is not multi-user's multiple-input and multiple-output,, obtain and the corresponding Signal to Interference plus Noise Ratio of confirming of said transmission block size then according to the corresponding relation of the transmission block size that is provided with in advance with Signal to Interference plus Noise Ratio.
5. method according to claim 4 is characterized in that, said definite current wireless environment grade of said subscriber equipment specifically comprises:
System is carried out emulation, confirm the wireless environment grade that said subscriber equipment is current according to simulation result.
6. method according to claim 1 is characterized in that, and is said according to said Resource Block quantity and said Signal to Interference plus Noise Ratio, confirms that the receiver sensitivity of receiver side specifically comprises:
According to said Resource Block quantity, obtain the said subscriber equipment size of at the bottom of the receiver of receiver side, making an uproar;
Through the size of making an uproar at the bottom of the said receiver is deducted said Signal to Interference plus Noise Ratio, obtain said receiver sensitivity.
7. method according to claim 1 is characterized in that, saidly confirms that up/descending path loss specifically comprises:
Confirm that through system emulation single carrier orthogonal frequency division multiplexing sends the said back-off value that peak-to-average force ratio causes;
According to the type of up/uplink/downlink antenna configuration, confirm said receiver antenna gain;
Obtain the transmitted power of said transmitting terminal, confirm said path loss through following formula:
The transmitted power of path loss Pathloss=transmitting terminal-back-off value-receiver sensitivity-interference margins+receiver antenna gain+other decay or gain, wherein, said other decay or gain are the gain or the decay of each link of up link.
8. a LTE system is up/deriving means of descending wireless coverage distance, it is characterized in that, and comprising:
First determination module; Be used for confirming to be positioned at the Signal to Interference plus Noise Ratio of the subscriber equipment of cell edge according to predetermined factors; Wherein, said predetermined factors comprises: the media access control MAC layer speed of said subscriber equipment, be the expense of the Resource Block quantity of said user device configuration, up/descending each channel;
Second determination module is used for confirming the receiver sensitivity of receiver side according to said Resource Block quantity and the definite said Signal to Interference plus Noise Ratio of said first determination module;
The 3rd determination module is used for transmitted power, back-off value, said receiver sensitivity, interference margins and receiver antenna gain according to transmitting terminal, confirms up/descending path loss;
The 4th determination module is used for the said path loss confirmed according to said the 3rd determination module, confirm said up/descending wireless coverage distance.
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| CN2008101618595A CN101719862B (en) | 2008-10-09 | 2008-10-09 | Method and device for acquiring uplink/downlink wireless covered space in LTE system |
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| CN2008101618595A CN101719862B (en) | 2008-10-09 | 2008-10-09 | Method and device for acquiring uplink/downlink wireless covered space in LTE system |
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| CN2008101618595A Expired - Fee Related CN101719862B (en) | 2008-10-09 | 2008-10-09 | Method and device for acquiring uplink/downlink wireless covered space in LTE system |
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| CN102857977B (en) * | 2011-06-27 | 2015-01-28 | 普天信息技术研究院有限公司 | RNTP (relative narrowband transmission power)-based interference coordinating method in LTE (long term evolution) system |
| CN102438254B (en) * | 2012-01-12 | 2014-07-23 | 电信科学技术研究院 | Method and device for confirming covered radius of PRACH (Physical Random Access Channel) |
| US9300431B2 (en) * | 2012-06-04 | 2016-03-29 | Alcatel Lucent | Apparatus, method and computer readable medium for payload segmentation of wireless packet data transmissions |
| WO2014026337A1 (en) * | 2012-08-15 | 2014-02-20 | 华为技术有限公司 | Power control method, base station and user equipment |
| CN103813455B (en) * | 2012-11-07 | 2017-09-29 | 中国电信股份有限公司 | Long evolving system parameter optimization distribution method and base station |
| CN105228247B (en) * | 2014-06-04 | 2019-03-05 | 中国移动通信集团公司 | Ascending resource distribution effects determines method and device |
| CN111542082B (en) * | 2020-05-22 | 2023-06-30 | 中国联合网络通信集团有限公司 | Method and device for determining coverage rate of downlink edge |
| CN111669773B (en) * | 2020-05-22 | 2022-06-21 | 中国联合网络通信集团有限公司 | Method and device for calculating edge rate |
| CN113115218B (en) * | 2021-03-16 | 2022-07-12 | 中国联合网络通信集团有限公司 | Method and device for determining coverage capability and storage medium |
| CN113115220B (en) * | 2021-03-16 | 2022-07-08 | 中国联合网络通信集团有限公司 | Coverage distance determination method and device and storage medium |
| CN113115221B (en) * | 2021-03-16 | 2022-09-02 | 中国联合网络通信集团有限公司 | Method, device and equipment for determining coverage distance and storage medium |
| CN112969186B (en) * | 2021-03-16 | 2022-08-12 | 中国联合网络通信集团有限公司 | Coverage distance determination method and device and storage medium |
| CN113068209B (en) * | 2021-03-16 | 2022-07-12 | 中国联合网络通信集团有限公司 | Method and device for determining coverage capability and storage medium |
| CN113115219A (en) * | 2021-03-16 | 2021-07-13 | 中国联合网络通信集团有限公司 | Coverage distance determination method and device |
| CN113709893B (en) * | 2021-09-22 | 2023-10-31 | 杭州红岭通信息科技有限公司 | Scheduling method of uplink service |
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| CN1400829A (en) * | 2001-07-27 | 2003-03-05 | 华为技术有限公司 | Method for implementing base station covering distance increment in mobile communication system |
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