CN105578581B - A kind of method and device of resource allocation - Google Patents
A kind of method and device of resource allocation Download PDFInfo
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- CN105578581B CN105578581B CN201510977612.0A CN201510977612A CN105578581B CN 105578581 B CN105578581 B CN 105578581B CN 201510977612 A CN201510977612 A CN 201510977612A CN 105578581 B CN105578581 B CN 105578581B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
- H04W52/244—Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of methods of resource allocation, are related to field of communication technology, can be effectively reduced the same layer interference that CRE user is subject to.The method include that determining connection relationship of the small minizone of every two in interference figure according to the interference parameter of each cell pair;It according to fixed connection relationship, is painted by the color of predetermined quantity to the cell in interference figure, and the cell with same color is determined as same small cell cluster;One of them small cell cluster is selected in fixed small cell cluster to interfere cluster, remaining small cell cluster is protection cluster;In protection cluster, all RB are distributed in a manner of poll all users, and, in interference cluster, ordinary user will be sequentially assigned to by SINR descending by the RB of all CRE user occupancies in protection cluster.The embodiment of the present invention is suitable for during heterogeneous network interference coordination.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of method and devices of resource allocation.
Background technique
LTE-A has introduced many advanced technologies, such as CA (Carrier Aggregation, carrier wave polymerization), MIMO
(Multi-input Multi-output, mimo antennas), CoMP (Coordinated Multiple Points, multiple spot
Cooperation) etc..But due to power system capacity approximation theory value, so effect is not obvious.Therefore, heterogeneous network comes into being.
Heterogeneous network is to joined some low power nodes, including femto base station under the traditional macro base station (macro) covering
(Picocell), Home eNodeB (Femtocell), relaying (Relay) etc..These nodes are small in size, are convenient for flexible deployment, reduce
Network overhead and operation cost are to solve indoor and hot spot scene capacity problem effective means.On the whole, they can be with
The load for mitigating the base station macro, improves the performance of edge customer.
In order to allow user reasonably to access the base station macro or small cell, 3GPP proposition CRE (Cell Range
Expansion, cell range extension) technology solves the problems, such as this, that is, allow the RSRP of the low power nodes that receive plus certain
Bias, be then compared again with the RSRP of the base station macro received, if the former is big, force part macro
User accesses low power nodes, this certain customers is also CRE user.Since a large amount of deployment of small cell are so that GRE user
It is interfered by same layer extremely serious.
Summary of the invention
The embodiment of the present invention provides a kind of method and device of resource allocation, can be effectively reduced what CRE user was subject to
Same layer interference.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
The embodiment of the invention provides a kind of methods of resource allocation, comprising:
Determine the interference sensor in each cell;
According to the interference information that the interference sensor is got, the interference parameter of each cell pair is determined;
According to the interference parameter of each cell pair, connection relationship of the small minizone of every two in interference figure is determined;
According to fixed connection relationship, painted by the color of predetermined quantity to the cell in interference figure, and
Cell with same color is determined as same small cell cluster;Wherein, there is connection relationship in the interference figure after colouring
Two cells have different colours;
One of them small cell cluster is selected in fixed small cell cluster to interfere cluster, remaining small cell cluster is protection
Cluster;
In protection cluster, all RB are distributed in a manner of poll all users, and, it, will in interference cluster
Ordinary user is sequentially assigned to by SINR descending by the RB of all CRE user occupancies in protection cluster.
The embodiment of the invention also provides a kind of devices of resource allocation, comprising:
First determination unit, for determining the interference sensor in each cell;
Second determination unit, the interference information for being got according to the interference sensor, determines each cell pair
Interference parameter;
Third determination unit determines that the small minizone of every two is being interfered for the interference parameter according to each cell pair
Connection relationship in figure;
Upper color element is used for according to fixed connection relationship, by the color of predetermined quantity to slight in interference figure
It paints in area;
4th determination unit, for the cell with same color to be determined as same small cell cluster;Wherein, after colouring
Interference figure in two cells with connection relationship have different colours;
Selecting unit, for selecting one of them small cell cluster to interfere cluster in fixed small cell cluster, remaining is small
Cell cluster is protection cluster;
Allocation unit is used in protection cluster, all RB is distributed in a manner of poll all users, and,
In interference cluster, ordinary user will be sequentially assigned to by SINR descending by the RB of all CRE user occupancies in protection cluster.
The method and device of resource allocation provided in an embodiment of the present invention, by determining interference according to same layer disturbed condition
Cluster and protection cluster, and the transimission power of SBSs in interference cluster is reduced, it normal can be used in having little influence on interference cluster in this way
In the case where family, effectively mitigate the same layer interference to CRE user in protection cluster.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of method flow diagram of resource allocation provided in an embodiment of the present invention;
Fig. 2 is the method flow diagram of another resource allocation provided in an embodiment of the present invention;
Fig. 3 is a kind of composition block diagram of the device of resource allocation provided in an embodiment of the present invention;
Fig. 4 is the composition block diagram of the device of another resource allocation provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention provides a kind of method of resource allocation, it is applied to small cell cell and macro is macro
In cell and the heterogeneous network deposited, as shown in Figure 1, comprising:
101, the interference sensor in each cell is determined.
In embodiments of the present invention, the CRE user for generally selecting channel quality best in each cell is as interference
Sensor.
102, the interference information got according to the interference sensor, determines the interference parameter of each cell pair.
The concrete methods of realizing of the step 102 is as shown in Figure 2, comprising:
1021, in the same cell pair, respectively determine the first cell interference sensor and the second small cell it
Between the first interference parameter, and, the second cell interference sensor and the first cell between the second interference parameter.
Wherein, the first and second cell belongs to the same cell pair;
1022, interference parameter of the greater of the first interference parameter and the second interference parameter as cell pair is selected.
103, according to the interference parameter of each cell pair, determine that connection of the small minizone of every two in interference figure is closed
System.
Wherein, interference figure is to provide the instruction figure of cell interference relationships between any two,
In view of the internal small area interference of different cells has strong and weak difference, some needs to consider more by force, simultaneously
Yet have some negligible interference.Therefore, the embodiment of the present invention provides a kind of determination side of connection relationship herein
Method, specific as follows:
The size relation of step 1, the interference parameter for determining each cell pair and interference threshold.Be greater than when interference parameter or
When equal to the interference threshold, 2 are thened follow the steps, it is no to then follow the steps 3.
Step 2, the cell for determining that the corresponding cell centering of interference parameter for being greater than interference threshold includes have connection
Relationship.
Step 3, the cell for determining that the corresponding cell centering of interference parameter for being less than interference threshold includes do not have company
Connect relationship.
104, according to fixed connection relationship, the cell in interference figure is carried out by the color of predetermined quantity
Color, and the cell with same color is determined as same small cell cluster;Wherein, in the interference figure after colouring there is connection to close
Two cells of system have different colours.
In embodiments of the present invention, it is painted, be can refer to the cell in interference figure by the color of predetermined quantity
Four chromogens reason is indicated, therefore can produce four small cell clusters, and more face also can be set according to actual needs certainly
Color indicates more small cell clusters.
105, one of them small cell cluster is selected in fixed small cell cluster to interfere cluster, remaining small cell cluster is to protect
Protect cluster.
106, in protection cluster, all RB (resource block, resource block) are distributed to institute in a manner of poll
Some users.
Wherein, all users may include CRE user and normal ordinary user, while require in different cells
CRE user is not multiplexed identical user as far as possible.
107, it in interference cluster, will protect in cluster by RB being sequentially assigned to by SINR descending of all CRE user occupancies
Ordinary user.
Simultaneously in order to be further reduced same layer interference, cell tune is carried out in the time domain the embodiment of the invention also provides a kind of
The method of degree, specifically includes:
In the first subframe, small cell cluster A is selected to interfere cluster, remaining small cell cluster is protection cluster;
In the second subframe, small cell cluster B is selected to interfere cluster, remaining small cell cluster is protection cluster;
Wherein, the first subframe and the second subframe are two adjacent subframes, and small cell cluster A and small cell cluster B are different each other
Small cell cluster.
For example, if small cell cluster 1 is set in the 1st and the 5th subframe time as interference using 8 subframes as a cycle
Cluster;Small cell cluster 2 is set in the 2nd and the 6th subframe time to interfere cluster;It is set in the 3rd and the 5th 7 subframe time small
Cell cluster 3 is interference cluster;Small cell cluster 4 is set in the 4th and the 8th subframe time to interfere cluster.In different subframes not by
The small cell cluster for being selected as interference cluster is protection cluster.Meanwhile the small-cell base station in cluster being interfered to drop on the RB that CRE user uses
Power protects the small-cell base station in cluster then to keep maximum transmission power on all holding resource blocks.By this flexible
Scheduling scheme effectively mitigates same layer interference.
Based on the above-mentioned technical proposal, by determining that interference cluster and protection are thick according to same layer disturbed condition, and interference is reduced
The transimission power of SBSs in cluster can effectively mitigate in having little influence on interference cluster in the case where normal user in this way
Same layer interference to CRE user in protection cluster.
In addition, proposing the resource allocation optimization scheme of power domain to mitigate the cross-layer interference that CRE user is subject to.
When the transmission power of the base station macro is higher, the handling capacity of macro user is big, but be subject to due to CRE user
Cross-layer serious interference, influences throughput of system;Conversely, when the transmission power of the base station macro is lower, the handling capacity of macro user
It is smaller, but the cross-layer interference mitigation that CRE user is subject to, help to improve throughput of system.In order in macro user throughput
A compromise point is obtained between the annoyance level that is subject to of CRE user, has introduced the design of game theory in embodiments of the present invention
Thinking, to optimize the transmission power of each base station macro.
When carrying out the adjustment of macro base station power, can be used utility function as follows:The former is the reward function in relation to macro user throughput, and the latter is related CRE user
The penalty of annoyance level.This is one using macro base station transmitting power as the optimization problem of independent variable, it is intended to be guaranteed
It is taken into account while macro user throughput and reduces the cross-layer interference that CRE user is subject to, it, can be with by differential evolution optimization algorithm
The transmission power of the base station macro optimized.
The embodiment of the invention also provides a kind of devices of resource allocation, as shown in Figure 3, comprising:
First determination unit 21, for determining the interference sensor in each cell.
Second determination unit 22, the interference information for being got according to the interference sensor, determines each cell
Pair interference parameter.
Third determination unit 23 determines the small minizone of every two dry for the interference parameter according to each cell pair
Disturb the connection relationship in figure.
Upper color element 24 is used for according to fixed connection relationship, by the color of predetermined quantity to small in interference figure
Cell is painted.
4th determination unit 25, for the cell with same color to be determined as same small cell cluster;Wherein, it paints
Two cells in interference figure afterwards with connection relationship have different colours.
Selecting unit 26, for selecting one of them small cell cluster to interfere cluster in fixed small cell cluster, remaining
Small cell cluster is protection cluster.
Allocation unit 27, for all RB being distributed in a manner of poll all users in protection cluster, with
And in interference cluster, ordinary user will be sequentially assigned to by SINR descending by the RB of all CRE user occupancies in protection cluster.
Optionally, first determination unit 21, the CRE for selecting channel quality best in each cell are used
Family is as interference sensor.
Optionally, as shown in figure 4, second determination unit 22 includes:
First determining module 221, for determining the interference sensor of the first cell respectively in the same cell pair
The first interference parameter between the second cell, and, between the interference sensor and the first cell of the second cell
Second interference parameter;Wherein, the first and second cell belongs to the same cell pair;
Selecting module 222, for selecting the greater of the first interference parameter and the second interference parameter as cell pair
Interference parameter.
Optionally, the third determination unit 23, for determining the interference parameter and interference threshold of each cell pair
Size relation;When interference parameter is greater than or equal to the interference threshold, determine that the interference parameter for being greater than interference threshold is corresponding
Cell centering include cell have connection relationship;When interference parameter is less than the interference threshold, determines to be less than and do
It disturbs the cell that the corresponding cell centering of interference parameter of threshold value includes and does not have connection relationship.
Optionally, the 4th determination unit 25, in the first subframe, selecting small cell cluster A to interfere cluster,
Remaining small cell cluster is protection cluster;In the second subframe, small cell cluster B is selected to interfere cluster, remaining small cell cluster is protection cluster.
Wherein, the first subframe and the second subframe are two adjacent subframes, and small cell cluster A and small cell cluster B are different each other
Small cell cluster.
Based on the method flow that above-mentioned apparatus is realized, by determining that interference cluster and protection are thick according to same layer disturbed condition,
And reduce interference cluster in SBSs transimission power, in this way can have little influence on interference cluster in normal user in the case where,
Effectively mitigate the same layer interference to CRE user in protection cluster.
Through the above description of the embodiments, it is apparent to those skilled in the art that the present invention can borrow
Help software that the mode of required common hardware is added to realize, naturally it is also possible to which the former is more preferably by hardware, but in many cases
Embodiment.Based on this understanding, the portion that technical solution of the present invention substantially in other words contributes to the prior art
Dividing can be embodied in the form of software products, which stores in a readable storage medium, such as count
The floppy disk of calculation machine, hard disk or CD etc., including some instructions are used so that computer equipment (it can be personal computer,
Server or the network equipment etc.) execute method described in each embodiment of the present invention.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
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Energy-efficient time-power domain resources allocation for macro-pico heterogeneous networks;Hao Zhou,Hailun Xia etc.;《Wireless Personal Multimedia Communication(WPMC),2014 International Symposioum on》;20150122;526-530 |
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