CN101895921A - Method for selecting coordinated multipoint cell - Google Patents
Method for selecting coordinated multipoint cell Download PDFInfo
- Publication number
- CN101895921A CN101895921A CN2009100846391A CN200910084639A CN101895921A CN 101895921 A CN101895921 A CN 101895921A CN 2009100846391 A CN2009100846391 A CN 2009100846391A CN 200910084639 A CN200910084639 A CN 200910084639A CN 101895921 A CN101895921 A CN 101895921A
- Authority
- CN
- China
- Prior art keywords
- enb
- threshold value
- rsrp
- time delay
- satisfies
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 40
- 125000004122 cyclic group Chemical group 0.000 claims description 6
- 238000012217 deletion Methods 0.000 claims description 5
- 230000037430 deletion Effects 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 abstract 1
- 239000013256 coordination polymer Substances 0.000 description 17
- 238000001228 spectrum Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000004891 communication Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method for selecting a coordinated multipoint CoMP cell. The method comprises the following steps of: presetting a threshold of the CoMP cell, selecting an ENB which meets the threshold of the CoMP cell as a candidate ENB from an adjacent base station ENB by user equipment (UE), and reporting the ENB to a main ENB. Through the method, the conditions of participating in the CoMP cell are definitely defined, so that the UE selects the ENB which meets the threshold of the CoMP cell from the adjacent ENBs; therefore, the receiving quality of users on the cell edge is optimized, and the spectral efficiency of the system edge is improved.
Description
Technical field
The present invention relates to the evolution version LTE-Advanced technology of long-term evolution plan (LTE, Long Term Evolved), the method for particularly a kind of selecting coordinated multiple spot (CoMP, Coordinative Multiple Point) sub-district.
Background technology
The LTE-Advanced technology is as 3rd Generation Partnership Project (3GPP, 3rdGeneration Partnership Project) technology that develops in follow-up radio communication, the integrated communications field advanced signal processing technology in the last few years, for example, OFDM (OFDM, Orthogonal Frequency Division Multiplexing) technology, many inputs and many output (MIMO, Multi-input and Multi-output) technology, adaptive techniques etc. have improved the capacity of wireless communication system greatly, spectrum efficiency and coverage.
For the intrasystem user of LTE-Advanced, in radio communication, may be in the center of sub-district (sector), also may be in the edge of sub-district.When the user is in center of housing estate, because the LTE-Advanced system does not have the inner OFDM of employing of processing gain and sub-district technology, make the user can not be subjected to the interference of this community user, in addition, interference source distance users from outer sub-district is also distant, thereby user's reception is good, and the spectrum efficiency of system is higher, and capacity is bigger; But when the user is in cell edge,, influenced user's reception, caused system ovelay range minimizing, edge spectrum efficiency to reduce owing to the interference and the transmission link mis-behave of outer sub-district.
In order to solve interference of users in cell edges, the edge spectrum efficiency of raising system and the reception of edge customer, prior art has proposed the technical scheme of CoMP cell transmission, be briefly described below: subscriber equipment (UE, User Equipment) judging under the bad situation of the quality of reception, two or three adjacent cells or base station (ENB around this UE of picked at random, Evolved Node B) as candidate CoMP sub-district, report the current affiliated main ENB of UE, main ENB is according to certain resource distribution strategy, for example, adopt the effective SIR mapping of index (EESM, Exponential Effective SIR Mapping) method, from the candidate CoMP sub-district that UE reports, choose the CoMP sub-district, utilize the unification of CoMP sub-district to be the Cell Edge User transmission signals, thereby provide service manner to Cell Edge User jointly by the CoMP sub-district, utilize space resources and improve the communication quality of Cell Edge User, realize both having eliminated interference, enhanced system coverage again improves the purpose of edge spectrum efficiency simultaneously.
By as seen above-mentioned, the technical scheme of existing C oMP cell transmission, two or three adjacent cells around this UE of UE picked at random are as candidate CoMP sub-district, though the power of adjacent cell is stronger, relative time delay is less, help improving the quality of reception of Cell Edge User, but because adjacent cell is a picked at random, may exist the better adjacent cell of channel circumstance not have the selected candidate of being CoMP sub-district, feasible adjacent cell as the CoMP sub-district is not that power is the strongest, relative time delay minimum adjacent cell, thereby influenced the quality of reception of Cell Edge User, the system edges spectrum efficiency is descended.
Summary of the invention
In view of this, a main purpose of the present invention is to provide a kind of CoMP of choosing method of sub-district, optimizes the quality of reception of Cell Edge User, the edge spectrum efficiency of raising system.
For achieving the above object, the invention provides the method for a kind of selecting coordinated multiple spot CoMP sub-district, this method comprises:
Set in advance CoMP sub-district threshold value;
User equipment (UE) from adjacent base station ENB, choose satisfy CoMP sub-district threshold value ENB as candidate ENB, report to main ENB.
Described CoMP sub-district threshold value comprises: relative time delay threshold value and Reference Signal Received Power RSRP threshold value.
Described user equipment (UE) is chosen the ENB that satisfies CoMP sub-district threshold value and is comprised from adjacent base station ENB:
Described UE chooses the ENB that satisfies described RSRP threshold value from described adjacent ENB, choose the ENB that satisfies threshold value in described relative time delay again from the ENB of the described RSRP of satisfying threshold value, perhaps,
Described UE chooses the ENB that satisfies threshold value in described relative time delay from described adjacent ENB, choose the ENB that satisfies described RSRP threshold value again from the described ENB that satisfies the threshold value in relative time delay.
Described UE chooses the ENB that satisfies described RSRP threshold value and comprises from described adjacent ENB:
Measure adjacent ENB in the RSRP at UE place value;
Obtain main ENB in the RSRP at UE place value;
Calculate adjacent ENB at the RSRP at UE place value and main ENB relative mistake in the RSRP at UE place value;
Choose the adjacent ENB that relative mistake is not more than described RSRP threshold value.
The described ENB that satisfies threshold value in described relative time delay that chooses from the ENB of the described RSRP of satisfying threshold value comprises:
The relative mistake that described UE measurement is chosen is not more than the ENB of described RSRP threshold value and the timing advance TA of main ENB correspondence;
Obtaining described relative mistake, to be not more than the relative timing lead of the TA of ENB correspondence of the described RSRP threshold value TA corresponding with main ENB poor;
Choose the ENB that described relative timing lead difference is not more than threshold value in described relative time delay.
After choosing the ENB that described relative timing lead difference is not more than threshold value in described relative time delay, report to before the main ENB, this method further comprises: the ENB that satisfies the threshold value in relative time delay that will select is stored in the ENB candidate list;
Maximum TA among the ENB that preserves in A, the described candidate list of calculating and the difference of minimum TA;
B, judge maximum TA and minimum TA difference whether greater than threshold value in described relative time delay, if steps A is returned in the then less ENB deletion of RSRP value among the ENB that maximum TA is corresponding with minimum TA from candidate list; Otherwise the ENB in the described candidate list as candidate ENB, is carried out the described operation that reports to main ENB.
Described UE chooses the ENB that satisfies threshold value in described relative time delay and comprises from described adjacent ENB:
Described UE measures the timing advance TA of adjacent ENB and main ENB correspondence;
The relative timing lead that obtains the TA of the described adjacent ENB correspondence TA corresponding with main ENB is poor;
Choose the ENB that described relative timing lead difference is not more than threshold value in described relative time delay.
After choosing the ENB that described relative timing lead difference is not more than threshold value in described relative time delay, report to before the main ENB, this method further comprises: the ENB that satisfies the threshold value in relative time delay that will select is stored in the ENB candidate list;
Maximum TA among the ENB that preserves in C, the described candidate list of calculating and the difference of minimum TA;
D, judge maximum TA and minimum TA difference whether greater than threshold value in described relative time delay, if, then calculate the described maximum TA ENB corresponding respectively in the RSRP at UE place value with minimum TA, step C is returned in ENB deletion that less RSRP value is corresponding from candidate list; Otherwise the ENB in the described candidate list as candidate ENB, is carried out the described operation that reports to main ENB.
Describedly from the described ENB that satisfies the threshold value in relative time delay, choose the ENB that satisfies described RSRP threshold value and comprise:
Obtain main ENB at the RSRP at UE place value RSRP
Max
Calculate adjacent ENB at the RSRP at UE place value and main ENB relative mistake Δ RSRP in the RSRP at UE place value
i
Choose the ENB that relative mistake is not more than described RSRP threshold value.
Described relative time delay, threshold value was the time span of Cyclic Prefix, perhaps, and the time span of Cyclic Prefix and a product less than one coefficient.
As seen from the above technical solutions, the method of selecting coordinated multiple spot CoMP provided by the invention sub-district, by setting in advance CoMP sub-district threshold value, UE from adjacent ENB, choose satisfy CoMP sub-district threshold value ENB as candidate ENB, report to main ENB, because the condition of CoMP participating sub-district is carried out clear and definite definition, make UE from adjacent ENB, choose the ENB that satisfies CoMP sub-district threshold value, can be the ENB that power is the strongest, relative time delay is minimum so that choose the ENB that reports, thereby optimized the quality of reception of Cell Edge User, improved the system edges spectrum efficiency.
Description of drawings
Fig. 1 chooses the method flow schematic diagram of CoMP sub-district for the present invention;
Fig. 2 chooses the schematic flow sheet of the ENB that satisfies the RSRP threshold value from adjacent ENB for the present invention;
Fig. 3 chooses the schematic flow sheet of the ENB that satisfies the threshold value in relative time delay from the ENB that satisfies the RSRP threshold value for the present invention;
Fig. 4 chooses another schematic flow sheet of the ENB that satisfies CoMP sub-district threshold value from adjacent ENB for UE of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
The method of choosing the CoMP sub-district provided by the invention, carry out clear and definite definition by condition to the CoMP participating sub-district, UE chooses the adjacent cell (ENB) that meets CoMP sub-district condition from adjacent cell (ENB), report main ENB then, at last determining the CoMP sub-district of actual participation by main ENB according to certain resource distribution strategy, below is that example describes to choose the ENB that meets CoMP sub-district condition.
Fig. 1 chooses the method flow schematic diagram of CoMP sub-district for the present invention, and referring to Fig. 1, this flow process comprises:
In this step, the CoMP sub-district threshold value that sets in advance can be each adjacent ENB of reflection the relative time delay at UE place threshold value and ENB at the Reference Signal Received Power (RSRP at UE place, Reference Signal Received Power) threshold value, also can be relative time delay threshold value and ENB at the Reference Signal Received Quality (RSRQ at UE place, Reference Signal Received Quality) threshold value can also be ENB other reception index at the UE place.
In the practical application, CoMP sub-district threshold value can set in advance in UE, also can be provided with by network center, is issued among the corresponding UE by main ENB then, and in follow-up flow process, can upgrades the CoMP sub-district threshold value that is provided with.
In describing below, with CoMP sub-district threshold value be relative time delay threshold value and the RSRP threshold value be that example describes.For CoMP sub-district threshold value is threshold value and the situation of RSRQ threshold value in relative time delay, because the RSRQ threshold value just is different threshold value indexs with the RSRP threshold value, it is identical with the flow process of choosing the CoMP sub-district from the adjacent ENB that satisfies the RSRP threshold value to choose the flow process of CoMP sub-district from the adjacent ENB that satisfies the RSRQ threshold value, follow-up repeating no more.
For the LTE-Advanced system that adopts the OFDM technology, because OFDM is divided into many orthogonal sub-channels at frequency domain with channel, the intercarrier of each subchannel keeps quadrature, and frequency spectrum is overlapped, has so just reduced the interference between subchannel, has improved the availability of frequency spectrum.Thereby the LTE-Advanced system is very responsive to frequency shift (FS), and very little frequency shift (FS) all may destroy the orthogonality between subcarrier, thereby produces inter-carrier interference (ICI, Inter-Carrier Interference); In addition, when the multipath signal time delay is big, the time delay diffusion of last symbol will constitute intersymbol interference (ISI, Inter-symbol Interference) to next symbol, for fear of ICI and ISI, by serial data stream being modulated on the parallel subcarrier, insert simultaneously Cyclic Prefix (CP, Cycle Prefix) in the data flow transmitted code word, i.e. protection at interval, by adding Cyclic Prefix, can prevent that a subcarrier and another subcarrier from obscuring the ICI of generation mutually; Simultaneously, when the time span of the CP that is inserted greater than multipath in during the maximum delay expansion, because the buffer action of CP, the multipath signal time delay is during less than the time span of CP, the time delay of last symbol is diffused in the time span of a CP by complete attenuation, thereby can not constitute intersymbol interference, eliminate ISI effectively next symbol.
In the present embodiment, for fear of the destroyed ICI that causes of orthogonality between the ISI that causes owing to the CP multipath delay and each subcarrier, can relative time delay threshold value be set to the time span τ of CP
CPWith a product smaller or equal to 1 positive coefficient, promptly relative time delay threshold value=α τ
CP, 0＜α≤1.Wherein, the time span τ of CP
CPCan be referring to related protocol, for example, for the CP that does not have expansion, τ
CP=4.6875 (us) are for the CP of expansion, τ
CP=16.67 (us).
When the ENB that chooses satisfies relative time delay during threshold value, can be so that the ENB minimum of choosing in relative time delay, thus more effectively eliminate the problem of ISI and ICI.
The signal power of RSRP threshold value reflection ENB, when the ENB that chooses satisfied the RSRP threshold value that is provided with, can guarantee to choose the ENB that reports was the stronger ENB of power among the adjacent ENB, thereby can optimize the quality of reception of Cell Edge User.
In this step, if CoMP sub-district threshold value is a threshold value and RSRP threshold value in aforesaid relative time delay, then UE at first chooses the ENB that satisfies the threshold value in relative time delay from adjacent ENB, from the ENB that satisfies the threshold value in relative time delay, choose the ENB that satisfies the RSRP threshold value again, the ENB that satisfies the RSRP threshold value that will choose then reports to main ENB as candidate ENB; Perhaps, UE at first chooses the ENB that satisfies the RSRP threshold value from adjacent ENB, chooses the ENB that satisfies the threshold value in relative time delay again from the ENB that satisfies the RSRP threshold value, and the ENB that satisfies the threshold value in relative time delay that will choose then reports to main ENB as candidate ENB.
UE chooses the ENB that satisfies CoMP sub-district threshold value from adjacent ENB schematic flow sheet as shown in Figures 2 and 3.
Specifically, Fig. 2 is the present invention chooses the ENB that satisfies the RSRP threshold value from adjacent ENB a schematic flow sheet, and referring to Fig. 2, this flow process comprises:
In this step, i ENB is designated as RSRP in the RSRP at UE place value
i, concrete method of measurement can not repeat them here referring to pertinent literature.
Step 202 is obtained main ENB at the RSRP at UE place value RSRP
Max
In this step, the main ENB that obtains is generally maximum in all RSRP values in the RSRP at UE place value, is designated as RSRP
Max
Step 203 is calculated adjacent each ENB at the RSRP at UE place value and the main ENB relative mistake Δ RSRP in the RSRP at UE place value
i
In this step, calculate i ENB at UE place and RSRP
MaxThe relative mistake formula be:
ΔRSRP
i＝RSRP
max-RSRP
i
Step 204 is chosen the ENB that satisfies the RSRP threshold value.
In this step, if Δ RSRP
i＜RSRP
Threshold, then this ENB is the ENB that satisfies the RSRP threshold value, in the formula, and RSRP
ThresholdBe the RSRP threshold value that sets in advance.
In the practical application, RSRP
ThresholdSetting and diversity gain, algorithm design are relevant, for example, and for existing LTE-Advanced system, RSRP
ThresholdValue can be set to below the 8dB.
Fig. 3 is the present invention chooses the ENB that satisfies the threshold value in relative time delay from the ENB that satisfies the RSRP threshold value a schematic flow sheet, and referring to Fig. 3, this flow process comprises:
In this step, the TA that UE measures ENB belongs to prior art, does not repeat them here, and the Timing Advance of i adjacent ENB correspondence is designated as TA
iThe Timing Advance of self the owner ENB of institute correspondence is designated as TA
Base
Step 302 is obtained the relative timing lead difference Δ TA of the Timing Advance of each the adjacent ENB correspondence Timing Advance corresponding with main ENB
i
In this step, relative timing lead difference Δ TA
iComputing formula be:
ΔTA
i＝TA
i-TA
base。
Step 303 is chosen the ENB that satisfies the threshold value in relative time delay;
In this step, the formula of choosing the ENB that satisfies the threshold value in relative time delay is:
ΔTA
i≤τ
CP
In the formula, τ
CPBe the threshold value in relative time delay.
In the practical application, UE chooses the ENB that satisfies the threshold value in relative time delay from the ENB that satisfies the RSRP threshold value after, promptly after the execution in step 303, the ENB that satisfies the threshold value in relative time delay that this can be chosen reports to main ENB as candidate ENB; Perhaps, for making the CoMP sub-district that reports can be more accurate, guarantee less overhead, the ENB that satisfies the threshold value in relative time delay can also be stored in the ENB candidate list and and do further to select, be i.e. execution in step 304～step 305 ENB that satisfies the threshold value in relative time delay that this is chosen.Particularly,
In this step, among the ENB that preserves in the candidate list, maximum Timing Advance is designated as Δ TA
Max, the minimum timing lead is designated as Δ TA
Min
In follow-up, main ENB receives the CoMP sub-district that reports, and determines the CoMP sub-district of actual participation according to certain resource distribution strategy, and is same as the prior art, do not repeat them here.
Fig. 4 is UE of the present invention chooses the ENB that satisfies CoMP sub-district threshold value from adjacent ENB another schematic flow sheet, and referring to Fig. 4, this flow process comprises:
Step 402 is obtained the relative timing lead difference Δ TA of the Timing Advance of each the adjacent ENB correspondence Timing Advance corresponding with main ENB
i
Step 403 is chosen the ENB that satisfies the threshold value in relative time delay;
In the practical application, after UE chooses the ENB that satisfies the threshold value in relative time delay, can from satisfying the ENB of threshold value in relative time delay, this choose the ENB that satisfies the RSRP threshold value, execution in step 405; Perhaps, for making the CoMP sub-district that reports can be more accurate, guarantee less overhead, the ENB that satisfies the threshold value in relative time delay can also be stored in the ENB candidate list, and this ENB that satisfies the threshold value in relative time delay made further to select i.e. execution in step 404a～step 404b.Particularly,
Step 405 among the ENB from the candidate list that step 403 or step 404b obtain, is measured adjacent each ENB in the RSRP at UE place value;
Step 406 is obtained main ENB at the RSRP at UE place value RSRP
Max
Step 407 is calculated adjacent each ENB at the RSRP at UE place value and the main ENB relative mistake Δ RSRP in the RSRP at UE place value
i
Step 408 is chosen the ENB that satisfies the RSRP threshold value.
In this step, if Δ RSRP
i＜RSRP
Threshold, then this ENB is the ENB that satisfies the RSRP threshold value, and all ENB of satisfying the RSRP threshold value in the candidate list as candidate ENB, are reported to main ENB, in the formula, and RSRP
ThresholdBe the RSRP threshold value that sets in advance.
As seen from the above-described embodiment, the method of choosing the CoMP sub-district provided by the invention, by setting in advance CoMP sub-district threshold value, UE chooses the ENB that satisfies CoMP sub-district threshold value from adjacent ENB, report to main ENB, determine the CoMP sub-district of actual participation according to certain resource distribution strategy by main ENB, because the condition of CoMP participating sub-district is carried out clear and definite definition, make UE from adjacent ENB, choose the ENB that satisfies CoMP sub-district threshold value, choosing the ENB that reports is that power is the strongest, relative time delay minimum ENB, thereby guarantee under the prerequisite of less overhead, to have optimized the quality of reception of Cell Edge User, improved the system edges spectrum efficiency.
More than lift preferred embodiment; the purpose, technical solutions and advantages of the present invention are further described; institute is understood that; the above only is preferred embodiment of the present invention; not in order to restriction the present invention; within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method for a selecting coordinated multiple spot CoMP sub-district is characterized in that this method comprises:
Set in advance CoMP sub-district threshold value;
User equipment (UE) from adjacent base station ENB, choose satisfy CoMP sub-district threshold value ENB as candidate ENB, report to main ENB.
2. the method for claim 1 is characterized in that, described CoMP sub-district threshold value comprises: relative time delay threshold value and Reference Signal Received Power RSRP threshold value.
3. method as claimed in claim 2 is characterized in that, described user equipment (UE) is chosen the ENB that satisfies CoMP sub-district threshold value and comprised from adjacent base station ENB:
Described UE chooses the ENB that satisfies described RSRP threshold value from described adjacent ENB, choose the ENB that satisfies threshold value in described relative time delay again from the ENB of the described RSRP of satisfying threshold value, perhaps,
Described UE chooses the ENB that satisfies threshold value in described relative time delay from described adjacent ENB, choose the ENB that satisfies described RSRP threshold value again from the described ENB that satisfies the threshold value in relative time delay.
4. method as claimed in claim 3 is characterized in that, described UE chooses the ENB that satisfies described RSRP threshold value and comprises from described adjacent ENB:
Measure adjacent ENB in the RSRP at UE place value;
Obtain main ENB in the RSRP at UE place value;
Calculate adjacent ENB at the RSRP at UE place value and main ENB relative mistake in the RSRP at UE place value;
Choose the adjacent ENB that relative mistake is not more than described RSRP threshold value.
5. method as claimed in claim 4 is characterized in that, the described ENB that satisfies threshold value in described relative time delay that chooses from the ENB of the described RSRP of satisfying threshold value comprises:
The relative mistake that described UE measurement is chosen is not more than the ENB of described RSRP threshold value and the timing advance TA of main ENB correspondence;
Obtaining described relative mistake, to be not more than the relative timing lead of the TA of ENB correspondence of the described RSRP threshold value TA corresponding with main ENB poor;
Choose the ENB that described relative timing lead difference is not more than threshold value in described relative time delay.
6. method as claimed in claim 5, it is characterized in that, after choosing the ENB that described relative timing lead difference is not more than threshold value in described relative time delay, report to before the main ENB, this method further comprises: the ENB that satisfies the threshold value in relative time delay that will select is stored in the ENB candidate list;
Maximum TA among the ENB that preserves in A, the described candidate list of calculating and the difference of minimum TA;
B, judge maximum TA and minimum TA difference whether greater than threshold value in described relative time delay, if steps A is returned in the then less ENB deletion of RSRP value among the ENB that maximum TA is corresponding with minimum TA from candidate list; Otherwise the ENB in the described candidate list as candidate ENB, is carried out the described operation that reports to main ENB.
7. method as claimed in claim 3 is characterized in that, described UE chooses the ENB that satisfies threshold value in described relative time delay and comprises from described adjacent ENB:
Described UE measures the timing advance TA of adjacent ENB and main ENB correspondence;
The relative timing lead that obtains the TA of the described adjacent ENB correspondence TA corresponding with main ENB is poor;
Choose the ENB that described relative timing lead difference is not more than threshold value in described relative time delay.
8. method as claimed in claim 7, it is characterized in that, after choosing the ENB that described relative timing lead difference is not more than threshold value in described relative time delay, report to before the main ENB, this method further comprises: the ENB that satisfies the threshold value in relative time delay that will select is stored in the ENB candidate list;
Maximum TA among the ENB that preserves in C, the described candidate list of calculating and the difference of minimum TA;
D, judge maximum TA and minimum TA difference whether greater than threshold value in described relative time delay, if, then calculate the described maximum TA ENB corresponding respectively in the RSRP at UE place value with minimum TA, step C is returned in ENB deletion that less RSRP value is corresponding from candidate list; Otherwise the ENB in the described candidate list as candidate ENB, is carried out the described operation that reports to main ENB.
9. as claim 7 or 8 described methods, it is characterized in that, describedly from the described ENB that satisfies the threshold value in relative time delay, choose the ENB that satisfies described RSRP threshold value and comprise:
Obtain main ENB at the RSRP at UE place value RSRP
Max
Calculate adjacent ENB at the RSRP at UE place value and main ENB relative mistake Δ RSRP in the RSRP at UE place value
i
Choose the ENB that relative mistake is not more than described RSRP threshold value.
10. as each described method of claim 2 to 8, it is characterized in that described relative time delay, threshold value was the time span of Cyclic Prefix, perhaps, the time span of Cyclic Prefix and a product less than one coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910084639A CN101895921B (en) | 2009-05-18 | 2009-05-18 | Method for selecting coordinated multipoint cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910084639A CN101895921B (en) | 2009-05-18 | 2009-05-18 | Method for selecting coordinated multipoint cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101895921A true CN101895921A (en) | 2010-11-24 |
| CN101895921B CN101895921B (en) | 2012-10-10 |
Family
ID=43104950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910084639A Expired - Fee Related CN101895921B (en) | 2009-05-18 | 2009-05-18 | Method for selecting coordinated multipoint cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101895921B (en) |
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118759A (en) * | 2011-03-02 | 2011-07-06 | 北京邮电大学 | Downlink transmission frequency division method for cooperating multipoint transmission system on the basis of service quality |
| CN102142889A (en) * | 2011-03-11 | 2011-08-03 | 无锡物联网产业研究院 | Multi-base-station cooperative receiving method and communication system |
| CN102625356A (en) * | 2011-02-01 | 2012-08-01 | 中兴通讯股份有限公司 | CoMP-based method for accessing multiple cells by terminal and system |
| WO2012106924A1 (en) * | 2011-07-25 | 2012-08-16 | 华为技术有限公司 | Method, equipment and system for coordinated multi-point transmission/reception |
| CN102651879A (en) * | 2011-02-28 | 2012-08-29 | 中兴通讯股份有限公司 | Method for selecting cooperative cells based on UE intelligent association and cooperative user equipment |
| WO2012155695A1 (en) * | 2011-07-29 | 2012-11-22 | 中兴通讯股份有限公司 | Evolved nodeb, system and method for selecting cooperating node |
| GB2491367A (en) * | 2011-05-31 | 2012-12-05 | Renesas Mobile Corp | Selecting base stations which can participate in a cooperative multipoint joint transmission on the basis of propagation delay variation |
| CN102970706A (en) * | 2011-08-29 | 2013-03-13 | 株式会社Ntt都科摩 | Selection method and base station for collaborative feedback set |
| WO2013034110A1 (en) * | 2011-09-09 | 2013-03-14 | 华为技术有限公司 | Joint scheduling method and device |
| CN103249160A (en) * | 2012-02-06 | 2013-08-14 | 工业和信息化部电信传输研究所 | Resource allocation method under CoMP transfer mode in LTE-A system |
| CN103297981A (en) * | 2012-03-05 | 2013-09-11 | 华为技术有限公司 | Method and device for interference coordination between base stations |
| CN103517288A (en) * | 2012-06-21 | 2014-01-15 | 华为技术有限公司 | Data transmission information acquisition method and device |
| US8731001B2 (en) | 2011-05-31 | 2014-05-20 | Broadcom Corporation | Methods and apparatus for determining participants in coordinated multi-point transmission |
| CN103906120A (en) * | 2012-12-27 | 2014-07-02 | 上海贝尔股份有限公司 | Method and device for configuring coordinated multi-point measurement set |
| WO2014101191A1 (en) * | 2012-12-31 | 2014-07-03 | 华为技术有限公司 | Method and device for determining comp user |
| CN104067538A (en) * | 2012-01-27 | 2014-09-24 | 三星电子株式会社 | Method and system for providing service in a wireless communication system |
| CN104602279A (en) * | 2015-01-08 | 2015-05-06 | 华北电力大学（保定） | Threshold value based collaboration base station clustering method and device in heterogeneous network |
| CN106105050A (en) * | 2014-03-19 | 2016-11-09 | 日本电气株式会社 | For working in coordination with multicast communication and receiving the signaling of (CoMP) |
| WO2017117776A1 (en) * | 2016-01-07 | 2017-07-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and devices for downlink flow control in wireless communication systems |
| CN107607908A (en) * | 2017-08-15 | 2018-01-19 | 中国科学院光电研究院 | A kind of localization method based on signal time delay feature spatial and temporal distributions |
| CN109168170A (en) * | 2017-06-29 | 2019-01-08 | ***通信集团陕西有限公司 | Cloud Radio Access Network dispatching method and relevant device, medium |
| CN109691051A (en) * | 2016-08-24 | 2019-04-26 | 高通股份有限公司 | A technique for for the wireless communication in cooperative multi-point operates |
| CN110072277A (en) * | 2011-04-01 | 2019-07-30 | 三菱电机株式会社 | Mobile terminal |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100690778B1 (en) * | 2005-04-19 | 2007-03-09 | 엘지전자 주식회사 | Idle handoff method for cellular mobile communication system |
| CN1694565A (en) * | 2005-05-20 | 2005-11-09 | 上海贝豪通讯电子有限公司 | Method of switching in TD-SCDMA communication system |
| US7924775B2 (en) * | 2006-03-17 | 2011-04-12 | Samsung Electronics Co., Ltd. | Apparatus and method for selecting modulation and filter roll-off to meet power and bandwidth requirements |
-
2009
- 2009-05-18 CN CN200910084639A patent/CN101895921B/en not_active Expired - Fee Related
Cited By (43)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625356A (en) * | 2011-02-01 | 2012-08-01 | 中兴通讯股份有限公司 | CoMP-based method for accessing multiple cells by terminal and system |
| WO2012103772A1 (en) * | 2011-02-01 | 2012-08-09 | 中兴通讯股份有限公司 | Comp-based method and system for ue to access multiple cells |
| CN102651879B (en) * | 2011-02-28 | 2017-02-08 | 中兴通讯股份有限公司 | Method for selecting cooperative cells based on UE intelligent association and cooperative user equipment |
| CN102651879A (en) * | 2011-02-28 | 2012-08-29 | 中兴通讯股份有限公司 | Method for selecting cooperative cells based on UE intelligent association and cooperative user equipment |
| CN102118759B (en) * | 2011-03-02 | 2014-01-29 | 北京邮电大学 | Downlink transmission frequency division method for cooperating multipoint transmission system on the basis of service quality |
| CN102118759A (en) * | 2011-03-02 | 2011-07-06 | 北京邮电大学 | Downlink transmission frequency division method for cooperating multipoint transmission system on the basis of service quality |
| CN102142889A (en) * | 2011-03-11 | 2011-08-03 | 无锡物联网产业研究院 | Multi-base-station cooperative receiving method and communication system |
| CN110072277A (en) * | 2011-04-01 | 2019-07-30 | 三菱电机株式会社 | Mobile terminal |
| CN110072277B (en) * | 2011-04-01 | 2021-10-12 | 三菱电机株式会社 | Mobile terminal |
| GB2491367A (en) * | 2011-05-31 | 2012-12-05 | Renesas Mobile Corp | Selecting base stations which can participate in a cooperative multipoint joint transmission on the basis of propagation delay variation |
| US8731001B2 (en) | 2011-05-31 | 2014-05-20 | Broadcom Corporation | Methods and apparatus for determining participants in coordinated multi-point transmission |
| GB2491367B (en) * | 2011-05-31 | 2013-05-08 | Renesas Mobile Corp | Methods and apparatus for determining participants in coordinated multi-point transmission |
| WO2012106924A1 (en) * | 2011-07-25 | 2012-08-16 | 华为技术有限公司 | Method, equipment and system for coordinated multi-point transmission/reception |
| WO2012155695A1 (en) * | 2011-07-29 | 2012-11-22 | 中兴通讯股份有限公司 | Evolved nodeb, system and method for selecting cooperating node |
| CN102905277B (en) * | 2011-07-29 | 2017-07-11 | 中兴通讯股份有限公司 | A kind of base station, the system and method for selection cooperative node |
| CN102905277A (en) * | 2011-07-29 | 2013-01-30 | 中兴通讯股份有限公司 | Base station, system and method for selecting cooperative nodes |
| CN102970706B (en) * | 2011-08-29 | 2018-05-29 | 株式会社Ntt都科摩 | The selection method of collaborative feedback collection and base station |
| CN102970706A (en) * | 2011-08-29 | 2013-03-13 | 株式会社Ntt都科摩 | Selection method and base station for collaborative feedback set |
| US9621309B2 (en) | 2011-09-09 | 2017-04-11 | Huawei Technologies Co., Ltd. | Joint scheduling method and apparatus |
| WO2013034110A1 (en) * | 2011-09-09 | 2013-03-14 | 华为技术有限公司 | Joint scheduling method and device |
| CN104067538A (en) * | 2012-01-27 | 2014-09-24 | 三星电子株式会社 | Method and system for providing service in a wireless communication system |
| US9860905B2 (en) | 2012-01-27 | 2018-01-02 | Samsung Electronics Co., Ltd. | Method and system for providing service in a wireless communication system |
| CN103249160A (en) * | 2012-02-06 | 2013-08-14 | 工业和信息化部电信传输研究所 | Resource allocation method under CoMP transfer mode in LTE-A system |
| CN103249160B (en) * | 2012-02-06 | 2018-11-20 | 工业和信息化部电信传输研究所 | A kind of resource allocation methods in lte-a system under CoMP |
| CN103297981B (en) * | 2012-03-05 | 2016-03-02 | 华为技术有限公司 | The method and apparatus of inter-station interference coordinating |
| CN103297981A (en) * | 2012-03-05 | 2013-09-11 | 华为技术有限公司 | Method and device for interference coordination between base stations |
| CN103517288A (en) * | 2012-06-21 | 2014-01-15 | 华为技术有限公司 | Data transmission information acquisition method and device |
| CN103517288B (en) * | 2012-06-21 | 2017-08-11 | 华为技术有限公司 | The acquisition methods and device of data transmission information |
| CN103906120A (en) * | 2012-12-27 | 2014-07-02 | 上海贝尔股份有限公司 | Method and device for configuring coordinated multi-point measurement set |
| CN104247287A (en) * | 2012-12-31 | 2014-12-24 | 华为技术有限公司 | Method and device for determining CoMP user |
| WO2014101191A1 (en) * | 2012-12-31 | 2014-07-03 | 华为技术有限公司 | Method and device for determining comp user |
| US10616880B2 (en) | 2014-03-19 | 2020-04-07 | Nec Corporation | Signalling for coordinated multi-point transmission and reception (CoMP) |
| CN106105050A (en) * | 2014-03-19 | 2016-11-09 | 日本电气株式会社 | For working in coordination with multicast communication and receiving the signaling of (CoMP) |
| CN106105050B (en) * | 2014-03-19 | 2019-10-18 | 日本电气株式会社 | For cooperateing with multicast communication and receiving the signaling of (CoMP) |
| CN104602279A (en) * | 2015-01-08 | 2015-05-06 | 华北电力大学（保定） | Threshold value based collaboration base station clustering method and device in heterogeneous network |
| CN104602279B (en) * | 2015-01-08 | 2018-03-09 | 华北电力大学（保定） | Cooperative base station cluster-dividing method and device based on threshold value in a kind of heterogeneous network |
| CN108432324A (en) * | 2016-01-07 | 2018-08-21 | 瑞典爱立信有限公司 | Method and apparatus for the downlink flow control in wireless communication system |
| US10694417B2 (en) | 2016-01-07 | 2020-06-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and devices for downlink flow control in wireless communication systems |
| WO2017117776A1 (en) * | 2016-01-07 | 2017-07-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and devices for downlink flow control in wireless communication systems |
| CN109691051A (en) * | 2016-08-24 | 2019-04-26 | 高通股份有限公司 | A technique for for the wireless communication in cooperative multi-point operates |
| CN109168170A (en) * | 2017-06-29 | 2019-01-08 | ***通信集团陕西有限公司 | Cloud Radio Access Network dispatching method and relevant device, medium |
| CN107607908A (en) * | 2017-08-15 | 2018-01-19 | 中国科学院光电研究院 | A kind of localization method based on signal time delay feature spatial and temporal distributions |
| CN107607908B (en) * | 2017-08-15 | 2020-06-05 | 中国科学院光电研究院 | Positioning method based on signal time delay characteristic space-time distribution |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101895921B (en) | 2012-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101895921B (en) | Method for selecting coordinated multipoint cell | |
| EP3029875B1 (en) | Method and device for interference control | |
| US9843942B2 (en) | Device and method of enhancing downlink UE-specific demodulation reference signal to facilitate inter-cell interference cancellation and suppression | |
| KR102397997B1 (en) | Methods and apparatus for discovery signals for lte advanced | |
| US8855005B2 (en) | Co-channel operation systems, methods, and devices | |
| AU2012348404B2 (en) | Initializing reference signal generation in wireless networks | |
| KR101612302B1 (en) | Method and apparatus for performing coordinated multiple point transmission/reception in wireless communication | |
| EP2962502B1 (en) | System and method for determining a pilot signal | |
| KR101633495B1 (en) | Method for multi-point cooperation that consider delay in wireless communication system | |
| WO2018113739A1 (en) | Resource configuration method, information sending method, base station and terminal | |
| US20140334320A1 (en) | Systems and Methods for Network Adaptation Support in Wireless Network | |
| TW201342839A (en) | Connected mode gap measurement for LTE TDD | |
| JP2014161073A (en) | Time shifting of co-channel data transmissions to reduce co-channel interference | |
| TW201728142A (en) | Narrow band ACK / NACK transmissions | |
| US9204400B2 (en) | Method and device for resource configuration | |
| JP2016536835A (en) | Measurement and signaling for network support to enable data ICs in small cell clusters | |
| EP4133833A1 (en) | Method and apparatus for parameter setting | |
| US20130331138A1 (en) | Method and apparatus for transmitting and receiving signal in wireless communication system | |
| JP5451827B2 (en) | Mobile station equipment | |
| EP3504816B1 (en) | Tiered control of iterative mimo receivers | |
| CN101795148A (en) | Mapping method and device based on channel quality indication calculation pilot frequency | |
| CN115278652A (en) | Interference cancellation receiver capability reporting method, terminal, base station and medium | |
| CN105282859A (en) | Method and device for transmission of active antenna system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA POTEVIO CO., LTD. Free format text: FORMER OWNER: PUTIAN IT TECH INST CO., LTD. Effective date: 20130906 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130906 Address after: 100080, No. two, 2 street, Zhongguancun science and Technology Park, Beijing, Haidian District Patentee after: China Potevio Information Industry Co., Ltd. Address before: 100080 Beijing, Haidian, North Street, No. two, No. 6, No. Patentee before: Putian IT Tech Inst Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: PUTIAN IT TECH INST CO., LTD. Free format text: FORMER OWNER: CHINA POTEVIO CO., LTD. Effective date: 20131202 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131202 Address after: 100080 Beijing, Haidian, North Street, No. two, No. 6, No. Patentee after: Putian IT Tech Inst Co., Ltd. Address before: 100080, No. two, 2 street, Zhongguancun science and Technology Park, Beijing, Haidian District Patentee before: China Potevio Information Industry Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20210518 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |