CN106209181B - A method of it is reconstructed using wavelength and improves CoMP performance - Google Patents
A method of it is reconstructed using wavelength and improves CoMP performance Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
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Abstract
The present invention provides a kind of methods for being reconstructed using wavelength and improving CoMP performance, belong to wireless communication technology field.The present invention adjusts the subordinate relation of baseband processing unit BBU and remote radio head RRH, the summation for the internal user service traffics for allowing the edge customer service traffics of Inter-BBU CoMP and wavelength to be migrated reaches minimum by reconstructing to wavelength.The present invention is realizes that wavelength reconstruct provides method based on topological diagram and based on the method for wavelength weight.It is reconstructed by wavelength, it alleviates to dock in distributed wireless access network in order to provide CoMP and forms huge pressure and impact into network especially X2 link, reduce the link stress between BBU, reduce the service traffics of Inter-BBU CoMP user, to increase the handling capacity of cell, QoS of customer is improved, the bearing capacity of network is integrally improved.
Description
Technical field
The invention belongs to wireless communication technology fields, in particular to a kind of reconstructed using wavelength to improve CoMP
The method of (Coordinated Multiple Point, cooperative multi-point) performance.
Background technique
In wireless communications, since LTE (Long Term Evolution, long term evolution) system uses MIMO
(Multiple-Input Multiple-Output, multiple-input, multiple-output) and OFDM (Orthogonal Frequency Division
Multiplexing, orthogonal frequency division multiplexing) technology, interference very little in cell between corresponding user or it can ignore.But it is right
For Cell Edge User, the co-channel interference of minizone seriously reduces marginal user performance, and the technical advantage of MIMO is not
Cell edge spectrum efficiency can preferably be improved, cell-edge performance has been increasingly becoming the bottleneck of system performance.Based on above-mentioned feelings
Condition, cooperative multipoint transmission technology has been introduced into LTE-A by 3GPP tissue, for improving and improving cell edge spectrum efficiency,
The performance of even entire cell system.
The target of cooperative multi-point (Coordinated Multiple Point, CoMP) transmission is the day for combining multiple cells
Line is combined to be transmitted to user, and the handling capacity of edge customer, branch of the enhancing conventional cell for edge are improved using diversity technique
Hold and promoted mobile user data transmission performance.
It can be inside of base station cooperation (Intra-Site (eNodeB) CoMP points according to the collaboration communication mode of cooperation point
) and cooperation between base stations (Inter-Site (eNodeB) CoMP) CoMP.In Intra-Site CoMP communication, all can be assisted
The cell of work is under the jurisdiction of the same eNodeB.Therefore, user data and necessary demodulating information are only in the same eNodeB
The minizone of BBU (baseband processing unit) administration swaps.In Inter-Site CoMP communication, cooperating can be expanded
Coverage area, more communication nodes can carry out cooperative transmission and reception.However since cooperation range is larger, data and letter
Channel state information (CSI) exchanges the problems such as causing the expense and delay of backhaul link between base station, in addition, clock with it is synchronous
Control also has certain difficulty.
In actual application, the cooperative association of minizone becomes widely cooperation scene.But in distributed network,
Each cell possesses respective digital processing element, so the cooperation of minizone means that this is between several BBU
CoMP(Inter-BBU CoMP).And in cloud (centralization) wireless access network, BBU is brought together to form BBU pool.
Network connection is used up between BBU pool and RRH (Remote Radio Head, remote radio head).One BBU can be more
A RRH provides service, and the CoMP between these RRH is referred to as the CoMP (Inter-BBU CoMP) in BBU.
In CoMP technology, system needs to be related to carry out the data information of user and being total to for channel information between multiple cells
Enjoy and multiple transmission nodes between resource coordination distribution.Therefore, in LTE-A Radio Access Network CoMP technology for backhaul chain
The characteristic on road has higher requirement.
Relevant conclusion has been obtained in the discussion of 3GPP standardized process: multi-cell cooperating processing can improve significantly
The interference of minizone is effectively reduced in the performance of wireless cellular network.CoMP technology realize during, need multiple base stations into
The precoding of row joint and transmission data-signal, and serviced user is dispatched on multiple resource blocks.Association during this
The data flow for making user must be shared between all cooperation cells.Therefore it in order to realize the above-mentioned stage, generally requires between base station
The information exchange of X2 interface progress big data quantity.The processing of business has stringent time restriction simultaneously, so to X2 link
Time delay also has very high requirement.However, these limitations are huge choose for the cost of X2 link and the complexity of realization
War.
Summary of the invention
The present invention proposes a kind of side for reconstructing using wavelength and improving CoMP performance based on cloud (centralization) wireless access network
Method enables more CoMP users that can provide CoMP service (Intra-BBU CoMP) by the same BBU by the reconstruct of wavelength.
A kind of method reconstructing raising CoMP performance using wavelength provided by the invention adjusts BBU by reconstructing to wavelength
With the subordinate relation of RRH, the internal user business for allowing the edge customer service traffics of Inter-BBU CoMP and wavelength to be migrated
The summation of flow reaches minimum.Wherein, carrying out wavelength reconstruct, there are two types of methods, illustrate separately below.
Firstly, the present invention is based on topological diagrams to carry out wavelength reconstruct, realize that steps are as follows:
Step 1, non-directed graph G=(V, E) is established, wherein node V includes two kinds of nodes of BBU and RRH in access net, side E
Comprising two kinds, one is the side between two RRH nodes, the weight on side is the user for requesting CoMP to service to two RRH simultaneously
Service traffics, another kind are the sides between RRH node and BBU node, and the weight on side is that the inside that RRH is being serviced by BBU is used
Family service traffics.
Step 2, the quantity of the BBU node in figure G is judged whether less than 2, if so, executing step 4；Otherwise, it establishes virtual
Topology chooses the BBU that business load is most heavy in BBU, is set as node BBUs, and merge remaining BBU to form a virtual section
Point BBUt。
Step 3, using asking max-flow method to acquire node BBUsAnd BBUtBetween minimal cut, according to the division of minimal cut
Determination is subordinated to BBUsRRH；From figure, by BBUsAll remove with the RRH for being subordinated to it, while removing and BBUsAnd subordinate
The connected side of RRH node, by dummy node BBUtSplit into reset condition；Then step 2 is executed.
Step 4, remaining RRH and the BBU are established subordinate relation, terminate this method by 1 BBU of residue in network.
Secondly, the present invention also provides a kind of wavelength reconstructing method based on wavelength weight, realizes that steps are as follows:
Step 2.1, all cells are traversed, the optimization weight OW, expectation wavelength EW and co-wavelength for obtaining each cell are adjacent
Meet cell ACs。
If current area is Vi, the service traffics of the current wavelength of Vi and the internal user of Vi are recorded；Searching has with Vi
All cell Vj of CoMP relationship are recorded and are applied for CoMP service between the current wavelength of each cell Vj and cell Vj and Vi
User service traffics；Then Vi will be added with the user traffic that Vj is recorded according to the wavelength of cell, will be had
There is the user traffic of identical base band to be added；The maximum wavelength of user traffic is as cell after finding out addition
The optimization weight OW of Vi, corresponding wavelength is desired wavelength EW, and all cell Vj with desired wavelength co-wavelength are defined
For co-wavelength abutting subdistrict ACs。
Step 2.2, a list L, selection optimization are established according to the sequence of the optimization weight OW of each cell from big to small
The wavelength of the cell is reconstructed into the expectation wavelength EW of the cell by the maximum cell of weight, then by the cell and the cell
ACsCell is removed from list L.
By step 2.2, the RRH with equating expections wavelength is made to be subordinated to the corresponding BBU of the expectation wavelength.
Step 2.3, it if list L non-empty, continues to execute step 2.2, otherwise, is finished, terminates this method.
It advantages of the present invention and has the active effect that the method for the present invention reduces inter-cell interference, improves cell edge
Handling capacity and service quality.It alleviates and is docked to provide CoMP into network especially X2 link in distributed wireless access network
Huge pressure and impact are formed, the link stress between BBU is reduced, reduces the Business Stream of Inter-BBU CoMP user
Amount, to increase the handling capacity of cell, improves QoS of customer, is integrally improved the bearing capacity of network.
Detailed description of the invention
Fig. 1 is that the present invention reconstructs the schematic diagram for improving CoMP performance by wavelength；
Fig. 2 is the flow diagram of the wavelength reconstructing method provided by the invention based on topological diagram；
Fig. 3 is the non-directed graph of the description BBU and RRH constructed in the embodiment of the present invention；
Fig. 4 is to divide subordinate BBU according to minimal cut to the non-directed graph of Fig. 3sRRH schematic diagram；
Fig. 5 is the flow diagram of the wavelength reconstructing method provided by the invention based on wavelength weight；
Fig. 6 is one embodiment, and (a) is the optimization weight of each cell；It (b) is the column comprising all optimizing cells weights
Table.
Specific embodiment
Below in conjunction with drawings and examples, the present invention is described in further detail.
The present invention is had found by analysis, in distributed wireless access network, due to the separation layout of BBU physically, is added
On be difficult to BBU the and RRH subordinate relation changed.Biggish network cost and calculating will be paid by resulting in minizone CoMP service
Cost.And in centralized wireless access network, weaken the fixation subordinate relation between BBU and RRH, that is to say, that pass through light net
The reconstruct of network can easily adjust the subordinate relation of BBU and RRH.A large amount of Inter-site CoMP would be possible to be converted into
Intra-BBU CoMP, the communication overhead between BBU greatly reduces in this, reduces the requirement to network capacity and time delay.
As shown in Figure 1, user U1 is converted into Intra-BBU CoMP from Inter-BBU CoMP by the reconstruct to wavelength.In addition
It should be noted that since the wavelength that the reconstruct of wavelength may cause partial interior user changes, user U3 as shown in figure 1
It is serviced before reconstruct by BBU2, and is serviced after reconstructing by BBU1.So should both consider when carrying out wavelength reconstruct
The purpose of edge customer also considers internal user simultaneously, the method for the present invention is to allow the edge customer service traffics of Inter-BBU CoMP
The summation for the internal user service traffics being migrated with wavelength reaches minimum.In Fig. 1, λ 1, λ 2, λ 3 indicate the wavelength of BBU.
The present invention provides a kind of wavelength reconstructing method based on topological diagram, Lai Tigao CoMP performance, process such as Fig. 2 institute
Show.
Step 1) establishes a non-directed graph G=(V, E), to describe BBU and RRH in access net.Wherein, if set VRRH
The set for representing RRH in access net, is the subset of V, if node therein is RRH1,RRH2,…,RRHk, k is RRH in access net
Number；Set VBBUThe set of BBU and the subset of V in access net are indicated, if node therein is BBU1,BBU2,…,
BBUp, p is the number of BBU in access net.E is the set on side, and each edge has a weight.Scheme to include two kinds of sides in G, one kind two
Side between a RRH, the weight on side are the user traffic for requesting CoMP to service to two RRH simultaneously.Such as (RRH1,
RRH2), weight is the user traffic for requesting CoMP to service to RRH1 and RRH2 simultaneously on side.Another side is RRH and BBU
Between side, the weight on side indicates the internal user service traffics that RRH is being serviced by BBU.Such as: (RRH1,BBU1), the side
Weight indicate RRH1By BBU1The service traffics of the internal user of service.
As shown in figure 3, in the exemplary access net, including two BBU include 7 RRH, mark marked as BBU1 and BBU2
Number be RRH1~RRH7.
Step 2) judges that the quantity for scheming the BBU node in G whether less than 2, if so, executing step 4, is otherwise established and virtually opened up
It flutters, chooses the BBU that business load is most heavy in BBU, be set as node BBUs, and merge remaining BBU to form a dummy node
BBUt。
Step 3) acquires node BBU using the method for seeking max-flowsAnd BBUtBetween minimal cut.According to drawing for minimal cut
It point can determine and to be subordinated to BBUsRRH.Then by BBU from figuresAll remove with the RRH for being subordinated to it, while removing and institute
The BBU statedsAnd the side that subordinate RRH node is connected.Then dummy node is split into reset condition.Carry out step 2.
As shown in figure 4, determining BBU according to minimal cutsSubordinate RRH node be RRH2, RRH3 and RRH6, by BBUsAnd from
The RRH node of category is removed, and the side being connected with these nodes is all removed.
Remaining 1 BBU and several RRH, establishes corresponding subordinate relation and terminates this method in step 4) network.
By by the foundation of RRH and BBU relationship, changing the wavelength of RRH again, reducing the link stress between BBU,
Reduce the service traffics of Inter-BBU CoMP user.
The present invention also provides a kind of wavelength reconstructing method based on wavelength weight, Lai Tigao CoMP performance, process such as Fig. 5
It is shown.In the method, the optimization weight of each cell is first defined.Then one is established according to the optimization weight of each cell
A list.Then it is optimized according to list.
The specific implementation steps are as follows:
Step 2.1, it if current area is Vi, records the current wavelength of Vi and Vi does not apply for the total business stream of CoMP user
Amount；Finding has all cell Vj of CoMP relationship with Vi, and record the current wavelength of each cell Vj and cell Vj and Vi it
Between application CoMP service user traffic.Then by the user traffic recorded in Vi and Vj according to the wave of cell
It is long to be added, the user traffic of base band having the same is added.
The wavelength of cell refers to the wavelength of the RRH of cell.It is connected between RRH and BBU by optical-fiber network, is connected to the light of RRH
Fibre has a wavelength, this wavelength is exactly the wavelength of RRH, that is, the wavelength of cell.Cell does not apply for the total of CoMP user
The internal user service traffics of service traffics i.e. cell.
As shown in fig. 6, cell indicates cell in figure, λ 1, λ 2, λ 3 respectively indicate the wavelength of cell.For example, the wave of cell 10
A length of 1, internal user service traffics are 8.The cell that surrounding has CoMP relationship with cell 10 has cell 2,3,4,5,6,7, and this 6
It is marked in the respective wavelength of cell and application CoMP is serviced between cell 10 user traffic such as figure.By this 7 cells
The user traffic recorded is added according to wavelength.For wavelength 1, user traffic 14；For wavelength 2, user
Service traffics are 15；For wavelength 3, user traffic 10.The corresponding user traffic sum of wavelength 2 is maximum, so
Wavelength 2 is desired wavelength (EW), and 15 this value are exactly to optimize weight (OW).
Find out the maximum wavelength of user traffic as cell Vi optimization weight (Optimized-weighted:
OW)；Corresponding wavelength is it is expected wavelength (Expect wavelength:EW)；And it is all small with desired wavelength co-wavelength
Area Vj is defined as co-wavelength abutting subdistrict (Adjacent cells with same wavelength:ACs).
As shown in fig. 6, the optimization weight of cell 10 is 15, it is expected that wavelength is wavelength 2, the cell 3 and 4 that wavelength is 2 is same
Wavelength abutting subdistrict.
All cells are traversed according to the above method, obtain OW, EW and the AC of each cells。
Step 2.2, a list L is established according to the sequence of the optimization weight (OW) of each cell from big to small, such as Fig. 6
(b) shown in.The selection optimization maximum cell of weight, is reconstructed into corresponding expectation wavelength (EW) for the wavelength of the cell, then will
The cell removes from list and by the AC of the cellsCell is also removed from list.
As shown in (b) of Fig. 6, the wavelength of cell 3 is reconstructed into wavelength 1 by the selection optimization maximum cell 3 of weight, then
Exactly the RRH of cell 3 is reconfigured on the BBU that wavelength is 1, to change the connection relationship between BBU and RRH.Then
Cell 3 and the corresponding co-wavelength abutting subdistrict-cell 1 of cell 3 are deleted from table.RRH with equating expections wavelength is subordinated to
The BBU of the expectation wavelength is reconstructed the subordinate relation between RRH and BBU by this step.Such as the cell 3 of Fig. 6, cell 3 is right
The RRH of the RRH and co-wavelength that answer are subordinated to the BBU that wavelength is λ 1.
Step 2.3, it if list L non-empty, continues to execute step 2.2, otherwise, is finished, terminates this method.
Claims (1)
1. a kind of reconstruct the method for improving CoMP performance using wavelength, which is characterized in that by being reconstructed to wavelength, adjustment BBU and
The subordinate relation of RRH；BBU represents baseband processing unit, and RRH represents remote radio head；Wherein, carrying out wavelength reconstruct, there are two types of sides
Method illustrates separately below: firstly, wavelength reconstruct is carried out based on topological diagram,
The wavelength reconstruct, is realized using the method based on topological diagram, realizes that steps are as follows:
Step 1, non-directed graph G=(V, E) is established, wherein node V includes two kinds of nodes of BBU and RRH in access net, and side E includes
Two kinds, one is the side between two RRH nodes, the weight on side is the customer service for requesting CoMP to service to two RRH simultaneously
Flow, another kind are the sides between RRH node and BBU node, and the weight on side is the internal user industry that RRH is being serviced by BBU
Business flow；
Step 2, the quantity of the BBU node in figure G is judged whether less than 2, if so, executing step 4；Otherwise, virtual topology is established,
The BBU that business load is most heavy in BBU is chosen, is set as node BBUs, and merge remaining BBU to form a dummy node
BBUt；
Step 3, it using asking max-flow method to acquire the minimal cut between node BBUs and BBUt, is determined according to the division of minimal cut
It is subordinated to the RRH of BBUs；It from figure, by BBUs and is subordinated to its RRH and all removes, while removing and BBUs and subordinate
The connected side of RRH node, splits into reset condition for dummy node BBUt；Then step 2 is executed；
Step 4, remaining RRH and the BBU are established subordinate relation, terminate this method by 1 BBU of residue in network；
Secondly, the wavelength reconstructing method based on wavelength weight,
The wavelength reconstruct, is realized using the method based on wavelength weight, realizes that steps are as follows:
Step 2.1, all cells are traversed, according to following method obtain each cell optimization weight OW, expectation wavelength EW and
Co-wavelength abutting subdistrict ACs；
If current area is Vi, the service traffics of the current wavelength of Vi and the internal user of Vi are recorded；Finding has CoMP with Vi
All cell Vj of relationship record the use for applying for CoMP service between the current wavelength of each cell Vj and cell Vj and Vi
The service traffics at family；Then Vi will be added with the user traffic that Vj is recorded according to the wavelength of cell, there will be phase
The user traffic of same base band is added；The maximum wavelength of user traffic is as cell Vi's after finding out addition
Optimize weight OW, corresponding wavelength is desired wavelength EW, and all and desired wavelength co-wavelength cell Vj is defined as together
Wavelength abutting subdistrict ACs；
Step 2.2, a list L, selection optimization weight are established according to the sequence of the optimization weight OW of each cell from big to small
The wavelength of the cell is reconstructed into the expectation wavelength EW of the cell, then by the ACs of the cell and the cell by maximum cell
Cell is removed from list L；
By step 2.2, the RRH with equating expections wavelength is made to be subordinated to the corresponding BBU of the expectation wavelength；
Step 2.3, it if list L non-empty, continues to execute step 2.2, otherwise, is finished, terminates this method.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102014408A (en) * | 2010-12-16 | 2011-04-13 | 北京拓明科技有限公司 | Data service flow and cell reelection-based mobile network analysis method |
| CN102076024A (en) * | 2009-11-24 | 2011-05-25 | 华为技术有限公司 | Base station, network system and implementation method |
| CN103297986A (en) * | 2013-06-09 | 2013-09-11 | 北京邮电大学 | Networking method for intelligent adaption wireless communication networks |
| CN103428705A (en) * | 2013-08-02 | 2013-12-04 | 北京邮电大学 | Method and device for allocating cell carrier frequency quantity |
| CN103947145A (en) * | 2011-11-04 | 2014-07-23 | 英特尔公司 | User equipment (UE)-specific assignment of demodulation reference signal (DMRS) sequences to support uplink (UL) coordinated multipoint (CoMP) |
| CN104717756A (en) * | 2013-12-13 | 2015-06-17 | 中国移动通信集团公司 | CoMP implementation method and system based on baseband pool |
| CN105323850A (en) * | 2014-07-15 | 2016-02-10 | 普天信息技术有限公司 | Uplink CoMP (Coordinated Multi-Point) resource allocation method |
-
2016
- 2016-07-27 CN CN201610602760.9A patent/CN106209181B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102076024A (en) * | 2009-11-24 | 2011-05-25 | 华为技术有限公司 | Base station, network system and implementation method |
| CN102014408A (en) * | 2010-12-16 | 2011-04-13 | 北京拓明科技有限公司 | Data service flow and cell reelection-based mobile network analysis method |
| CN103947145A (en) * | 2011-11-04 | 2014-07-23 | 英特尔公司 | User equipment (UE)-specific assignment of demodulation reference signal (DMRS) sequences to support uplink (UL) coordinated multipoint (CoMP) |
| CN103297986A (en) * | 2013-06-09 | 2013-09-11 | 北京邮电大学 | Networking method for intelligent adaption wireless communication networks |
| CN103428705A (en) * | 2013-08-02 | 2013-12-04 | 北京邮电大学 | Method and device for allocating cell carrier frequency quantity |
| CN104717756A (en) * | 2013-12-13 | 2015-06-17 | 中国移动通信集团公司 | CoMP implementation method and system based on baseband pool |
| CN105323850A (en) * | 2014-07-15 | 2016-02-10 | 普天信息技术有限公司 | Uplink CoMP (Coordinated Multi-Point) resource allocation method |
Non-Patent Citations (2)
| Title |
|---|
| Baseband unit cloud interconnection enabled by flexible grid optical networks with software defined elasticity;Jiawei Zhang等;《IEEE Communications Magazine》;20150930;第53卷(第9期);第90-98页 |
| Cooperating Base Station Set Selection and Network Reconfiguration in Limited Backhaul Networks;Martin Draxler等;《2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications - (PIMRC)》;20121231;第1383-1389页 |
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