CN102811446B - Method and device for wireless relay node address selection - Google Patents
Method and device for wireless relay node address selection Download PDFInfo
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- CN102811446B CN102811446B CN201110142818.3A CN201110142818A CN102811446B CN 102811446 B CN102811446 B CN 102811446B CN 201110142818 A CN201110142818 A CN 201110142818A CN 102811446 B CN102811446 B CN 102811446B
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Abstract
The invention discloses a method for wireless relay node address selection. The method includes that wireless relay nodes are installed at positions, which can meet requirements of bandwidth required for communication of all UE (user equipment) accessing to the wireless relay nodes, and where the maximum signal to interference and noise ratio (SINR) of channels between the wireless relay nodes and macro base stations accessed with the wireless relay nodes is achieved. The invention further discloses a device for wireless relay node address selection. By means of setting multiple measurement points, communication quality and bandwidth requirement of positions of different wireless relay nodes to be installed are detected, wireless link performance of an access side and a return side of the wireless relay nodes are taken into consideration sufficiently, positions occupying smallest system resources are selected for configuring the wireless relay nodes on the premise of guaranteeing service quality of the UE on the access side, and accordingly occupation of the system resources is reduced to the utmost extent on the premise of guaranteeing local coverage performance.
Description
Technical field
The present invention relates to a kind of addressing technique of relay station, more particularly to a kind of site selecting method and dress of wireless relay nodes
Put.
Background technology
Next generation mobile communication system is required to bring the service level for being close to broadband internet, third generation cooperation for UE
Partnership projects (3GPP, 3rd Generation Partnership Project) tissue has begun to formulate (LTE-A, Long
Term Evolution Advanced) standard, in order to meet International Telecommunication Union of International Telecommunication Union Radiocommunication Sector
The forth generation (4G, 4th Generation) that (ITU-R, Radio communication Sector of ITU) is formulated is mobile
The demand of communication, 3GPP define Demand Frame for LTE-A, including support the descending 1Gbps peak values being significantly increased relative to LTE
Speed and up 500Mbps peak rates, lower UE planes and control plane postpone, and higher peak value and average frequency spectrum are imitated
Rate, and higher cell edge throughput etc..
Due to rare, the frequency ranges of the LTE-A most likely with very high frequency range such as 3.5GHz of frequency spectrum resource, but altofrequency
The path loss for causing is also bigger, and especially cell edge, can cause power system capacity and cell edge throughput not good.It is directed to this,
Can increase macro base station density reduce coverage radius of cell by way of solve, but this can be significantly increased network operation into
This.To cut operating costs, at present by introducing wireless relay nodes reducing the radius of MPS process.Wireless relay nodes
Main Function is to expand MPS process area, is that the serious area of shadow fading in cell and the dead angle for covering provide service letter
Number, there is provided the covering of hot zones and in-door covering etc..As the structure complexity of wireless relay nodes is far below base station, send out
Penetrate power again little, therefore, it is possible to providing flexible deployment way and avoiding the addressing of great number, installation cost, additionally, in wireless
It is wireless mode after the back haul link of node, saves the cost of wire-line back haul.
After wireless relay nodes are introduced in network, new connecting link is increased：Access link is (between relaying and relaying UE
Link) and relay return link (relaying and macro base station between link).When wireless relay nodes deployed position is selected, need
Via node to be made as far as possible can coverage goal region, access side ensure UE communication requirement, while backhaul side ensure have
Preferably back haul link, can carry the portfolio that relaying accesses side UE.Therefore, the addressing of wireless relay nodes is in network design
When it is particularly significant.At present, the addressing mode of wireless relay nodes is substantially the mode incorporated experience into based on Theoretical Calculation, but examines
Consider the property complicated and changeable of actual environment, the impact that these complicated geographical environments are caused to the relay return link of wireless mode
Very huge, traditional addressing mode is not particularly suited for the addressing mode of wireless relay nodes.
The content of the invention
In view of this, present invention is primarily targeted at providing a kind of site selecting method and device of wireless relay nodes, energy
The installation site for meeting coverage requirement and more meeting communication bandwidth requirement is determined for wireless relay nodes.
To reach above-mentioned purpose, the technical scheme is that what is be achieved in that：
A kind of site selecting method of wireless relay nodes, including：
Required band when will meet all user equipmenies (UE, the User Equipment) communication for accessing wireless relay nodes
It is wide, and between the wireless relay nodes and its macro base station for being accessed channel signal to noise ratio (SINR, Signal to
Interference plus Noise Ratio) maximum position, as the installation site of the wireless relay nodes.
Preferably, desire bandwidth when all UE that can meet access wireless relay nodes communicate, be：
Determine the spectrum efficiency of channel between UE and the wireless relay nodes in each measurement point；Count each measurement point
The probability that the upper UE in connection status occurs；
Determine all UE communications desire bandwidth B in position to be installedneed, in BneedLess than or equal to the wireless relay nodes institute
During the maximum bandwidth of distribution, desire bandwidth when can meet all UE communications for accessing wireless relay nodes；Wherein,Wherein, tiFor on ith measurement point between UE and the wireless relay nodes channel spectrum efficiency, piFor
The probability that UE on ith measurement point in connection status occurs, n are measurement point sum, and c will for the average communication speed of UE
Ask.
Preferably, the spectrum efficiency for determining channel between UE and the wireless relay nodes in each measurement point, be：
Determine the transfer rate of channel between UE and the wireless relay nodes in each measurement point, by the transfer rate
Spectrum efficiency is used for the channel occupancy bandwidth；
Or, determine the signal to noise ratio of channel between UE and the wireless relay nodes, then by the signal to noise ratio that sets with
The corresponding relation of spectrum efficiency finds out corresponding spectrum efficiency.
Preferably, the probability that the UE counted in each measurement point in connection status occurs, be：
In each measurement point, statistics sets UE in period T and is in the time span of connection status as T1, in connection shape
The probability that the UE of state occurs is T1/T.
Preferably, the position to be installed of the wireless relay nodes is located at the center in region to be configured, and/or is located at
Wireless signal can cover the position in whole region to be configured.
A kind of addressing device of wireless relay nodes, including：
Determining unit will be for meeting desire bandwidth when all UE for accessing wireless relay nodes communicate and described
The SINR of channel maximum position between wireless relay nodes and its macro base station for being accessed, as the wireless relay nodes
Installation site.
Preferably, the determining unit is further used for, determine in each measurement point UE and the wireless relay nodes it
Between channel spectrum efficiency；Count the probability that the UE in each measurement point in connection status occurs；And, determine position to be installed
Put all UE communications desire bandwidth Bneed, in BneedDuring the maximum bandwidth distributed less than or equal to the wireless relay nodes, meet
Desire bandwidth when accessing all UE communications of wireless relay nodes；Wherein,Wherein, tiFor ith measurement point
The spectrum efficiency of channel, p between upper UE and the wireless relay nodesiGo out for the UE on ith measurement point in connection status
Existing probability, n are measurement point sum, and c is the average communication rate requirement of UE.
Preferably, the determining unit is further used for,
Determine the transfer rate of channel between UE and the wireless relay nodes in each measurement point, by the transfer rate
Spectrum efficiency is used for the channel occupancy bandwidth；
Or, determine the signal to noise ratio of channel between UE and the wireless relay nodes, then by the signal to noise ratio that sets with
The corresponding relation of spectrum efficiency finds out corresponding spectrum efficiency.
Preferably, the determining unit is further used for,
In each measurement point, statistics sets UE in period T and is in the time span of connection status as T1, in connection shape
The probability that the UE of state occurs is T1/T.
Preferably, the position to be installed of the wireless relay nodes is located at the center in region to be configured, and/or is located at
Wireless signal can cover the position in whole region to be configured.
In the present invention, by way of multiple measurement points are set, the position to be installed of different wireless relay nodes is entered
Row communication quality and bandwidth demand detected, has taken into full account that wireless relay nodes access the wireless link of side and backhaul side
Can, on the premise of ensureing to access side UE service quality, the position deployment wireless relay nodes for selecting occupying system resources minimum,
Lack the occupancy of system resource on the premise of ensureing region overlay performance as far as possible.
Description of the drawings
Fig. 1 is application scenarios schematic diagram of the present invention；
Site selecting method flow charts of the Fig. 2 for the wireless relay nodes of the embodiment of the present invention；
Fig. 3 is to estimate in the embodiment of the present invention that wireless relay nodes meet the flow process of the bandwidth needed for accessing side communication requirement
Figure.
Specific embodiment
The basic thought of the present invention is, based on the measurement result of measurement point in wireless relay nodes target coverage area, to estimate
Meter wireless relay nodes service the service quality of UE in position candidate (position to be installed), and wireless relay nodes are based on back haul link
SINR selects serving macro base station, and considers wireless relay nodes in the service quality for accessing side service UE and account in backhaul side
System resource, selects the optimal location of deployment wireless relay nodes.
It is to make the object, technical solutions and advantages of the present invention become more apparent, by the following examples and referring to the drawings, right
The present invention is further described.
Fig. 1 is application scenarios schematic diagram of the present invention, as shown in Figure 1, it is assumed that the region A in figure is due to being in macrocell edge
Or the reason such as have building to stop, the signal quality that its internal UE receives macrocell is poor, need by wireless relay nodes come
Improve communication quality.When the present invention determines the installation site of wireless relay nodes in region a, considered in the A of region first
Wireless relay nodes are installed to cover whole region A in heart position, or, it is arranged at other positions that can cover whole region A
Put (such as the other positions of deflected areas A centers, the such as higher building of height is first-class).Selecting wireless relay nodes
Behind position to be installed, in addition it is also necessary to select around which containing multiple measurement points, to measure wireless relay section in these measurement points
Point accesses the signal quality of side.Certainly, the present invention is equally also required to carry out access side in the position to be installed of wireless relay nodes
With the measurement of correlation of backhaul side.
Site selecting method flow charts of the Fig. 2 for the wireless relay nodes of the embodiment of the present invention, as shown in Fig. 2 the nothing of this example
The site selecting method of line via node specifically includes following steps：
Step 201, chooses measurement point in the region for needing to dispose wireless relay nodes；
With reference to the application scenarios of Fig. 1, if needing by disposing wireless relay nodes the region to improve communication quality to be Fig. 1
In region A, multiple measurement points are chosen in the A of region, the principle of selection is that measurement point position UE can reach, survey
Amount point as far as possible spread all over overlay area A and can comprehensively in reflecting regional A wireless environment, if the common n of these measurement points is individual, use M1,
M2..., MnRepresent.In the present invention, measurement point is more disperseed, and the quantity of selected measurement point is more, and the measurement effect for being reached is got over
It is good, be more conducive to determining preferably installation site for wireless relay nodes.
Step 202, chooses wireless relay nodes position to be installed；
Choose being specially for wireless relay nodes position to be installed：According to the specific environment in the A of region, it is selected to install
The position candidate of wireless relay nodes, selection principle are the center close proximity to region A, or ensure the covering of region A as far as possible, if
These position candidates are common m, use R1, R2..., RmRepresent.
In the present invention, strict execution sequence between above-mentioned steps 201 and step 202, is had no, it is also possible to first in FIG
Region A chooses the position to be installed of wireless relay nodes, around these positions to be installed again chooses measurement point.Consider
Step 203, measurement point measurement wireless relay nodes access sidelinks performance, estimate that wireless relay nodes meet and access
Bandwidth needed for the communication requirement of side；
Fig. 3 is to estimate in the embodiment of the present invention that wireless relay nodes meet the flow process of the bandwidth needed for accessing side communication requirement
Figure, as shown in figure 3, estimating that wireless relay nodes meet the bandwidth accessed needed for the communication requirement of side and specifically include following steps：
Step 2031, in R1, R2..., RmIn select an installation site for wireless relay nodes, and by wireless relay section
Point is installed in the installation site of selection, the transmission signal on full bandwidth, and communication system side is the total of wireless relay nodes distribution
With a width of B；
Step 2032, in all measurement points M1, M2..., Mn, measured in this measurement point is received wirelessly using measuring apparatus
After the SINR of node signal, γ is designated as respectively1, γ2..., γn, and UE and wireless relay section are calculated according to measured SINR
The corresponding spectrum efficiency of channel between point, is designated as t1, t2..., tn.In the present invention, spectrum efficiency is channel transmission rate and institute
The ratio of occupied bandwidth.Specifically, calculating for spectrum efficiency can use the shannon formula of amendment to determine, also can be by arranging channel
The corresponding table of SINR value and spectrum efficiency, (different SINR values corresponding obtained by spectrum efficiency) obtaining as tabling look-up,
The present invention repeats no more the other modes for obtaining spectrum efficiency；Above-mentioned measuring apparatus can be the equipment of similar mobile phone, but only
There is the function of the relevant parameters such as measurement link SINR.
Count in each measurement point, the probability that the UE in connection status occurs, respectively p1, p2..., pn.System
Meter mode can be, one section of setting T observing time, if the region A in Fig. 1 is Office Area, T can be one section in the working time
Time, if region A is residential block, T can be non-working time and a period of time in the length of one's sleep, if region A is shopping
Center, T can be the weekend volume of the flow of passengers larger a period of time etc..For some measurement point, in time period T, have and be in company
The time span for meeting the UE of state is T1, then, in the measurement point, have the probability that the UE in connection status occurs to be p=T1/
T.That is, the period that wireless relay nodes are accessed to occurring UE in certain time period counts, and the counting statistics period
Take the ratio of whole period, i.e., the probability for occurring as the UE having in connection status.
Step 2033, calculates wireless relay nodes and is accessing side to meet all UE communications desire bandwidth Bneed, calculate public
Formula is：Wherein c is the average communication rate requirement of each UE.
Step 2034, wireless relay nodes select other positions to be installed successively, it is determined that needed for different positions to be installed
Access side bandwidth.
Step 204, wireless relay nodes measurement backhaul link performance, selects serving macro base station；
For a position to be installed, if Bneed≤ B, wireless relay nodes close on macro base station letter around this position measurement
Number quality, used as backhaul side serving macro base station, this SINR value is represented the macro base station for selecting SINR value best with β；If Bneed＞ B,
This position to be installed is abandoned then.
Step 205, estimates bandwidth and backhaul link performance according to side is accessed, selects wireless relay nodes deployed position.
The position to be installed of test wireless relay nodes, the position to be installed for selecting the back haul link β value for wherein measuring maximum
Put wireless relay nodes are installed.In other words, B is met allneedIn the position to be installed of≤B, treating for β value maximum is selected
Installation site is installing wireless relay nodes.
The present invention is led to the position to be installed of different wireless relay nodes by way of arranging multiple measurement points
Believe that quality and bandwidth demand are detected, taken into full account that wireless relay nodes access the radio link performance of side and backhaul side,
On the premise of ensureing to access side UE service quality, the position deployment wireless relay nodes for selecting occupying system resources minimum are protected
Lack the occupancy of system resource on the premise of card region overlay performance as far as possible.
The present invention describes a kind of addressing device of wireless relay nodes simultaneously, including：
Determining unit will be for meeting desire bandwidth when all UE for accessing wireless relay nodes communicate and described
The SINR of channel maximum position between wireless relay nodes and its macro base station for being accessed, as the wireless relay nodes
Installation site.
Above-mentioned determining unit is further used for, and determines in each measurement point channel between UE and the wireless relay nodes
Spectrum efficiency；Count the probability that the UE in each measurement point in connection status occurs；And, determine all UE in position to be installed
Communication desire bandwidth Bneed, in BneedDuring the maximum bandwidth distributed less than or equal to the wireless relay nodes, meet access it is wireless
Desire bandwidth when all UE of via node communicate；Wherein,Wherein, tiFor UE and institute on ith measurement point
State the spectrum efficiency of channel between wireless relay nodes, piFor the probability of the UE appearance of connection status is on ith measurement point,
N is measurement point sum, and c is the average communication rate requirement of UE.
Above-mentioned determining unit is further used for,
Determine the transfer rate of channel between UE and the wireless relay nodes in each measurement point, by the transfer rate
Spectrum efficiency is used for the channel occupancy bandwidth；
Or, determine the signal to noise ratio of channel between UE and the wireless relay nodes, then by the signal to noise ratio that sets with
The corresponding relation of spectrum efficiency finds out corresponding spectrum efficiency.
Above-mentioned determining unit is further used for,
In each measurement point, statistics sets UE in period T and is in the time span of connection status as T1, in connection shape
The probability that the UE of state occurs is T1/T.
The position to be installed of above-mentioned wireless relay nodes is located at the center in region to be configured, and/or is located at wireless communication
Number can cover the position in whole region to be configured.
The determining unit of the addressing device of the wireless relay nodes of the present invention, specifically by the process with data-handling capacity
Device and corresponding software are realized, or combine the measuring unit with corresponding measurement function to realize.The concrete function of determining unit and
Realization rate, specifically can be found in the associated description of the site selecting method of the wireless relay nodes of the present invention and understands.
The above, only presently preferred embodiments of the present invention is not intended to limit protection scope of the present invention.
Claims (8)
1. a kind of site selecting method of wireless relay nodes, it is characterised in that methods described includes：
Desire bandwidth when will meet all user equipment (UE)s communications for accessing wireless relay nodes, and the wireless relay section
The maximum position of signal to noise ratio SINR of channel between point and its macro base station for being accessed, as the installation of the wireless relay nodes
Position；
Wherein, it is determined that before the installation site of the wireless relay nodes, needing to dispose the area of the wireless relay nodes
Measurement point is set in domain；Or,
It is determined that after the installation site of the wireless relay nodes, it is determined that the installation site around measurement point is set；
Desire bandwidth when all UE that access wireless relay nodes can be met communicate, be：
Determine the spectrum efficiency of channel between UE and the wireless relay nodes in each measurement point；Count
In the probability that the UE of connection status occurs；
Determine all UE communications desire bandwidth B in position to be installedneed, in BneedDistributed less than or equal to the wireless relay nodes
Maximum bandwidth when, can meet and access desire bandwidth when all UE of wireless relay nodes communicate；Wherein,Its
In, tiFor on ith measurement point between UE and the wireless relay nodes channel spectrum efficiency, piTo locate on ith measurement point
In the probability that the UE of connection status occurs, n is measurement point sum, and c is the average communication rate requirement of UE.
2. method according to claim 1, it is characterised in that UE and the wireless relay in the determination each measurement point
The spectrum efficiency of channel between node, be：
Determine the transfer rate of channel between UE and the wireless relay nodes in each measurement point, by the transfer rate and institute
That states channel occupancy bandwidth is used for spectrum efficiency；
Or, determine the signal to noise ratio of channel between UE and the wireless relay nodes, then the signal to noise ratio and frequency spectrum by setting
The corresponding relation of efficiency finds out corresponding spectrum efficiency.
3. method according to claim 1, it is characterised in that the UE in the statistics each measurement point in connection status
The probability of appearance, be：
In each measurement point, statistics sets UE in period T and is in the time span of connection status as T1, in connection status
The probability that UE occurs is T1/T.
4. method according to claim 1, it is characterised in that the position to be installed of the wireless relay nodes is located at and waits to match somebody with somebody
Put the center in region, and/or the position that whole region to be configured can be covered positioned at wireless signal.
5. the addressing device of a kind of wireless relay nodes, it is characterised in that described device includes：
Determining unit will be for meeting desire bandwidth when all UE for accessing wireless relay nodes communicate and described wireless
The SINR of channel maximum position between via node and its macro base station for being accessed, as the installation of the wireless relay nodes
Position；
The determining unit, is additionally operable to it is determined that before the installation site of the wireless relay nodes, needing to dispose the nothing
Measurement point is set in the region of line via node；Or,
It is determined that after the installation site of the wireless relay nodes, it is determined that the installation site around measurement point is set；
The determining unit is further used for, and determines the frequency spectrum of channel between UE and the wireless relay nodes in each measurement point
Efficiency；Count the probability that the UE in each measurement point in connection status occurs；And, determine all UE communications in position to be installed
Desire bandwidth Bneed, in BneedDuring the maximum bandwidth distributed less than or equal to the wireless relay nodes, meet and access wireless relay
Desire bandwidth when all UE of node communicate；Wherein,Wherein, tiFor UE on ith measurement point and the nothing
The spectrum efficiency of channel, p between line via nodeiFor the probability of the UE appearance of connection status is on ith measurement point, n is
Measurement point sum, average communication rate requirements of the c for UE.
6. device according to claim 5, it is characterised in that the determining unit is further used for,
Determine the transfer rate of channel between UE and the wireless relay nodes in each measurement point, by the transfer rate and institute
That states channel occupancy bandwidth is used for spectrum efficiency；
Or, determine the signal to noise ratio of channel between UE and the wireless relay nodes, then the signal to noise ratio and frequency spectrum by setting
The corresponding relation of efficiency finds out corresponding spectrum efficiency.
7. device according to claim 5, it is characterised in that the determining unit is further used for,
In each measurement point, statistics sets UE in period T and is in the time span of connection status as T1, in connection status
The probability that UE occurs is T1/T.
8. device according to claim 5, it is characterised in that the position to be installed of the wireless relay nodes is located at and waits to match somebody with somebody
Put the center in region, and/or the position that whole region to be configured can be covered positioned at wireless signal.
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| CN103916886B (en) * | 2012-12-30 | 2017-08-04 | 重庆重邮信科通信技术有限公司 | Virtual measuring method, system, anolog base station and test terminal |
| US9461729B2 (en) * | 2013-12-13 | 2016-10-04 | Huawei Technologies Co., Ltd. | Software-defined network infrastructure having virtual range extenders |
| CN106162817A (en) * | 2015-04-03 | 2016-11-23 | 北京佰才邦技术有限公司 | The method for building up of wireless backhaul links, device and communication system |
| CN105491637B (en) * | 2015-12-08 | 2018-08-24 | 深圳大学 | Mobile relay best relay position searching method based on fixed step size and system |
| CN105554841B (en) * | 2015-12-08 | 2018-10-12 | 深圳大学 | A kind of best relay position searching method and system based on step-length threshold mechanism |
| CN105554842B (en) * | 2015-12-08 | 2018-10-12 | 深圳大学 | A kind of method for searching and hunting system of more mobile relay optimal communications position |
| CN105554840B (en) * | 2015-12-08 | 2018-10-12 | 深圳大学 | The method for searching and system of best relay position based on Contrary compensation mechanism |
| CN105828325B (en) * | 2016-05-24 | 2019-01-08 | 中国联合网络通信集团有限公司 | The location determining method and system of newly-increased relay station |
| CN106507377B (en) * | 2016-10-25 | 2019-04-05 | 北京航空航天大学 | A kind of optimal site selecting method of communication network relay |
| WO2018166579A1 (en) * | 2017-03-13 | 2018-09-20 | Huawei Technologies Co., Ltd. | Apparatus and method for nomadic relay node deployment |
| TW201919403A (en) * | 2017-11-14 | 2019-05-16 | 移動商務股份有限公司 | Streaming video management system, method, and computer program product thereof |
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