CN105357759A - Resource centralized allocation method for small cell, equipment and system - Google Patents
Resource centralized allocation method for small cell, equipment and system Download PDFInfo
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- CN105357759A CN105357759A CN201510621055.9A CN201510621055A CN105357759A CN 105357759 A CN105357759 A CN 105357759A CN 201510621055 A CN201510621055 A CN 201510621055A CN 105357759 A CN105357759 A CN 105357759A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000001228 spectrum Methods 0.000 claims abstract description 217
- 238000007726 management method Methods 0.000 claims description 88
- 230000011664 signaling Effects 0.000 claims description 62
- 238000013468 resource allocation Methods 0.000 claims description 59
- 238000012545 processing Methods 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 13
- 238000002372 labelling Methods 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 5
- 238000010295 mobile communication Methods 0.000 abstract description 2
- 230000023402 cell communication Effects 0.000 abstract 2
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- 230000001413 cellular effect Effects 0.000 description 2
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- 238000001514 detection method Methods 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 208000000649 small cell carcinoma Diseases 0.000 description 2
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- 238000002922 simulated annealing Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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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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Abstract
The invention relates to a resource centralized allocation method for a small cell, equipment and a system, relating to the field of mobile communication. Small cell centralized management equipment is arranged in a small cell communication system. The small cell centralized management equipment counts spectrum resources of macro users in advance and reserves the spectrum resources of the micro users, and then manages and allocates the spectrum resources of the small cell in a centralized way. The small cell and adjacent macro base stations can coexist in harmony, the internet interference can be lowered, the network can be guaranteed to run stably, and local adjacent small cells can be guaranteed to coexist in harmony. The invention also provides small cell centralized management equipment and a small cell communication system for allocating resources centrally.
Description
Technical field
The present invention relates to moving communicating field, especially relate to the method for resource allocation in a kind of little base station set, the little base station communication system of a kind of little base station centralized management equipment and centralized distribution resource.
Background technology
Along with the ultra dense degree networking that mobile broadband process is brought, subminaturization wireless base station SmallCell arises at the historic moment.Little base station SmallCell is lower powered radio access node, supports multiple wireless standard, comprises 2G, 3G, 4G and Wi-Fi, can cover the scope of 10 ~ 200m, may be used for indoor and outdoors.Little base station relies on fixed broadband access to provide mobile data services at a high speed for indoor user, can alleviate capacity pressure and the coverage requirement of macro base station with less cost.
The deployment way of little base station is different from traditional macrocell base stations, the unified network planning is carried out without the need to operator, its environment for use is determined by user completely, simultaneously as the expansion of wireless cellular network in indoor service, it and existing wireless network standards and mobile subscriber terminal compatible, operator is without the need to carrying out extra configuration effort again.Due to current cellular network rely on the network planning come distinguishing cell and control interference, when user buy voluntarily and deploy numerous without the little base station of planning and configuration after, inevitably will introduce serious interference in a network.
In the white paper " InterferenceManagementinOFDMAFemtocells " that SmallCellForum issues, summarize interference management is carried out in existing little base station technology by resource distribution, specifically can be divided into frequency domain interference coordination technique, time domain interference coordination technology and power control techniques.Wherein frequency domain interference coordination technique is with orthogonal frequency domain resource distribution for representative, and the perception of little base station is from geographical position residing in macro base station, if be in macro base station central area, just use macro base station to configure to the frequency band of macro base station fringe region, vice versa.Although this scheme can avoid the mutual interference between little base station and macro base station to a certain extent, but still there is the problem of mutually fighting for resource, interference mutually between little base station.In addition, because little base station is disposed voluntarily by user, probably deployed position is in the edges cover overlapping region of two adjacent macro base stations, and now little base station is difficult to judgement should configure this little base station available band according to the frequency band division of which macro base station.
In prior art, a kind of method carries out frequency configuration by Configuration Control Unit to Home eNodeB, and Configuration Control Unit generates the frequency configuration information of Home eNodeB according to the wireless environment detection result of Home eNodeB and bandwidth estimation information.Wherein, bandwidth estimation is predicted value, and bandwidth needed for actual user exists certain deviation, and the frequency configuration information generated thus and actual demand also can exist deviation to a certain degree, with carry out frequency configuration according to real-time bandwidth demand information and compare, accuracy is lower.And the program does not solve the problem that Home eNodeB and macro base station fight for resource.
The another kind of technical scheme of prior art is controlled by accessing control server, and this Control Server can store the mapping relations of macro station/between little base station and the local gateway of its correspondence.Although the accessing control server in this scheme has certain management role to little base station, only possess access control function, do not possess resource management function.
The method be configured by the available frequency of femto gateway to Home eNodeB in addition in prior art.In real network is disposed, gateway device quantity is far smaller than household base station device quantity, only there are several gateway devices in a general area, along with popularizing of Home eNodeB, during the situation of particularly ultra dense degree networking, the signaling pressure that dependence gateway management household equipment can give gateway serious and administrative loads, and in the program, do not consider that Home eNodeB and macro base station fight for the problem of resource yet.
Summary of the invention
Fight for the deficiency of resource problem for unresolved little base station and macro base station in existing little BTS management technology, the first object of the present invention is the method providing resource allocation in a kind of little base station set.
The second object of the present invention is to provide a kind of little base station centralized management equipment.
The third object of the present invention is the little base station communication system providing centralized distribution resource.
The method of resource allocation in described a kind of little base station set, little base station centralized management equipment is configured in little base station communication system, at least one adjacent little base station is made to be connected to little base station centralized management equipment by passback net, and managed by this little base station centralized management equipment, each adjacent little base station is only connected to a little base station centralized management equipment, and this little base station centralized management equipment implements following steps:
1) receive the Signal to Interference plus Noise Ratio of each frequency spectrum resource that each adjacent little base station terminal detects in real time, by Signal to Interference plus Noise Ratio lower than predetermined threshold value and the frequency spectrum resource of interference source other little base stations non-, be labeled as macro base station user and use frequency spectrum resource;
2) in preset period of time, adding up each period internal labeling is macro base station user frequency spectrum resource number;
3) according to the statistics of last time same preset period of time, predict the macro base station user frequency spectrum resource number in each adjacent little base station range in next same preset period of time, and be labeled as down state; And the statistics of preserving in each preset period of time;
4) frequency spectrum resource receiving each adjacent little base station distributes request, and the frequency spectrum resource service condition according to each adjacent little base station calculates frequency spectrum resource allocation result, and generates frequency spectrum resource assignment signalling, is sent to each adjacent little base station.
Preferably, step 4) comprise the following steps:
41) judge whether available spectrum resources meets resource allocation request, if meet, then enter step 42), otherwise, enter step 43);
42) be each adjacent little base station user terminal distribution available spectrum resources, and generate frequency spectrum resource assignment signalling, send to each adjacent little base station;
43) redistribute the frequency spectrum resource of each adjacent little base station, and generate frequency spectrum resource assignment signalling, send to each adjacent little base station.
In step 42) in, described available spectrum resources can be: in total frequency spectrum resource, the frequency spectrum resource of remainder except the grand user's frequency spectrum resource distributed to each adjacent little base station and be labeled as down state.
The method of resource allocation in a kind of little base station set of the present invention, carries out centralized management and configuration by the available resources of little base station centralized management equipment to little base station, this locality, ensures the harmonious coexistence between local adjacent little base station.Meanwhile, by predicting the traffic carrying capacity of the grand user in little base station range, for grand user reserves resource, reaching the target with adjacent macro base station harmonious coexistence, reducing network interferences, Logistics networks stable operation.
Based on same object, the present invention also provides a kind of little base station centralized management equipment of the method for implementing resource allocation in described a kind of little base station set, and described little base station centralized management equipment comprises message processing module, statistical module, computing module and Signalling exchange module;
Message processing module: the Signal to Interference plus Noise Ratio of each frequency spectrum resource that each adjacent little base station terminal for receiving Signalling exchange module forwards detects in real time, by Signal to Interference plus Noise Ratio lower than predetermined threshold value and the frequency spectrum resource of interference source other little base stations non-, be labeled as macro base station user and use frequency spectrum resource; Preserve mark result, and preserve the statistics of statistical module and computing module to the frequency spectrum resource allocation result of each adjacent little base station;
Statistical module: in preset period of time, adding up each period internal labeling is macro base station user frequency spectrum resource number;
Computing module: for the statistics according to last time same preset period of time, predicts the macro base station user frequency spectrum resource number in each adjacent little base station range in next same preset period of time, and is labeled as down state; The frequency spectrum resource receiving each adjacent little base station of Signalling exchange module forwards distributes request, and the frequency spectrum resource service condition according to each adjacent little base station calculates frequency spectrum resource allocation result and is sent to Signalling exchange module;
Signalling exchange module: the Signal to Interference plus Noise Ratio of each frequency spectrum resource that each adjacent little base station terminal sent for receiving each adjacent little base station detects in real time, and be forwarded to message processing module; The frequency spectrum resource receiving each adjacent little base station distributes request, and described request is sent to computing module, receives the frequency spectrum resource allocation result of computing module and generates frequency spectrum resource assignment signalling, being sent to each adjacent little base station.
Preferably, described computing module calculates frequency spectrum resource allocation result according to the frequency spectrum resource service condition of each adjacent little base station, is specially:
Judge whether available spectrum resources meets resource allocation request, if meet, be then each adjacent little base station user terminal distribution available spectrum resources, distribution frequency spectrum resource result is sent to Signalling exchange module; Otherwise redistribute the frequency spectrum resource of each adjacent little base station, and distribution frequency spectrum resource result is sent to Signalling exchange module;
Described available spectrum resources is: in total frequency spectrum resource, the frequency spectrum resource of remainder except the grand user's frequency spectrum resource distributed to each adjacent little base station and be labeled as down state.
Simultaneously, based on common object, the present invention also provides a kind of little base station communication system utilizing a kind of centralized distribution resource of described little base station centralized management equipment and little base station composition, the little base station communication system of described centralized distribution resource comprises little base station and little base station centralized management equipment, by configuring little BTS management equipment, at least one adjacent little base station is made to be connected to a little base station centralized management equipment by passback net, and managed by this little base station centralized management equipment, each adjacent little base station is only connected to a little base station centralized management equipment, described little base station centralized management equipment connects gateway,
The Signal to Interference plus Noise Ratio of each frequency spectrum resource of described little base station for receiving user terminal and detecting in real time, and this testing result is sent to little base station centralized management equipment, also for the request according to user terminal, send frequency spectrum resource and distribute request to little base station centralized management equipment, and receive the frequency spectrum resource assignment signalling of little base station centralized management equipment, provide frequency spectrum resource to the user terminal in coverage;
Described little base station centralized management equipment comprises message processing module, statistical module, computing module and Signalling exchange module:
Message processing module: the Signal to Interference plus Noise Ratio of each frequency spectrum resource that each adjacent little base station terminal for receiving Signalling exchange module forwards detects in real time, by Signal to Interference plus Noise Ratio lower than predetermined threshold value and the frequency spectrum resource of interference source other little base stations non-, be labeled as macro base station user and use frequency spectrum resource; Preserve mark result, and preserve the statistics of statistical module and computing module to the frequency spectrum resource allocation result of each adjacent little base station;
Statistical module: in preset period of time, adding up each period internal labeling is macro base station user frequency spectrum resource number;
Computing module: for the statistics according to last time same preset period of time, predicts the macro base station user frequency spectrum resource number in each adjacent little base station range in next same preset period of time, and is labeled as down state; The frequency spectrum resource receiving each adjacent little base station of Signalling exchange module forwards distributes request, and the frequency spectrum resource service condition according to each adjacent little base station calculates frequency spectrum resource allocation result and is sent to Signalling exchange module;
Signalling exchange module: the Signal to Interference plus Noise Ratio of each frequency spectrum resource that each adjacent little base station terminal sent for receiving each adjacent little base station detects in real time, and be forwarded to message processing module; The frequency spectrum resource receiving each adjacent little base station distributes request, and described request is sent to computing module, receives the frequency spectrum resource allocation result of computing module and generates frequency spectrum resource assignment signalling, being sent to each adjacent little base station.
Preferably, described computing module calculates frequency spectrum resource allocation result according to the frequency spectrum resource service condition of each adjacent little base station, is specially:
Judge whether available spectrum resources meets resource allocation request, if meet, be then each adjacent little base station user terminal distribution available spectrum resources, distribution frequency spectrum resource result is sent to Signalling exchange module; Otherwise redistribute the frequency spectrum resource of each adjacent little base station, and distribution frequency spectrum resource result is sent to Signalling exchange module;
Described available spectrum resources is: in total frequency spectrum resource, the frequency spectrum resource of remainder except the grand user's frequency spectrum resource distributed to each adjacent little base station and be labeled as down state.
The little base station communication system of a kind of little base station centralized management equipment provided by the invention and centralized distribution resource, propose a kind of equipment that can carry out global administration to little base station, the problem that little base station and macro base station fight for resource is solved by prediction and the means of resource reservation, while the local macro base station user priority access of guarantee, abundant coordinated allocation residual spectrum resource between adjacent little base station, improve frequency resource utilance, reach the object of effective Suppression network interference.
Accompanying drawing explanation
Fig. 1 is the method flow schematic diagram of resource allocation in the little base station set of the present invention;
Fig. 2 is the method one preferred embodiment schematic flow sheet of resource allocation in the little base station set of the present invention;
Fig. 3 is the structural representation of a kind of little base station of the present invention centralized management equipment embodiment;
Fig. 4 is the network architecture diagram deploying little base station centralized management equipment embodiment;
Fig. 5 is the operative scenario figure of the embodiment of the present invention;
Fig. 6 is little base station centralized management equipment is the schematic diagram that each little base station reconfigures resource.
Embodiment
Following examples will the present invention is further illustrated by reference to the accompanying drawings.It should be noted that following specific embodiment just in order to the realization of more detailed description technical solution of the present invention, and be not considered a disclaimer of those alternate embodiments.Any not through the use to technical scheme of the present invention of creative work, combination etc. all should be thought in technical scheme of the present invention.
A kind of method of resource allocation in little base station set, little base station centralized management equipment is configured in little base station communication system, at least one adjacent little base station is made to be connected to a little base station centralized management equipment by passback net, and managed by this little base station centralized management equipment, each adjacent little base station is only connected to a little base station centralized management equipment; This little base station centralized management equipment implements following steps as shown in Figure 1:
1) receive the Signal to Interference plus Noise Ratio of each frequency spectrum resource that each adjacent little base station terminal detects in real time, by Signal to Interference plus Noise Ratio lower than predetermined threshold value and the frequency spectrum resource of interference source other little base stations non-, be labeled as macro base station user and use frequency spectrum resource.
The Signal to Interference plus Noise Ratio situation of the frequency domain resource that the adjacent little base station in the centralized management equipment of same little base station detects according to user terminal, regularly report little base station centralized management equipment, the resource allocation conditions of each little base station of testing result and storage is compared by little base station centralized management equipment, wherein Signal to Interference plus Noise Ratio is lower than certain thresholding and the resource of interference source other little base stations non-, marks it and is used by macro base station user.
2) in preset period of time, adding up each period internal labeling is macro base station user frequency spectrum resource number.
3) according to the statistics of last time same preset period of time, predict the macro base station user frequency spectrum resource number in each adjacent little base station range in next same preset period of time, and be labeled as down state; And the statistics of preserving in each preset period of time;
Little base station centralized management equipment was added up the resource usage quantity of macro base station user in each period according to the period pre-set, at the end of a period, according in the past to the statistics of the next period of this period, predict the frequency spectrum resource quantity required for macro base station user in each little base station range interior of the next period of this period, kept for by the frequency spectrum resource of respective numbers the macro base station user in little base station range to use.
4) frequency spectrum resource receiving each adjacent little base station distributes request, and the frequency spectrum resource service condition according to each adjacent little base station calculates frequency spectrum resource allocation result, and generates frequency spectrum resource assignment signalling, is sent to each adjacent little base station.
When the user terminal of adjacent little base station initiates new service request, adjacent little base station forms resource allocation request signaling according to new service request and sends to little base station centralized management equipment, little base station centralized management equipment according to the resource service condition of the signaling received and current each little base station, computational resource allocation result.
A preferred embodiment of the embodiment of the present invention, step 4) comprise the following steps:
41) judge whether available spectrum resources meets resource allocation request, if meet, then enter step 42), otherwise, enter step 43);
42) be each adjacent little base station user terminal distribution available spectrum resources, and generate frequency spectrum resource assignment signalling, send to each adjacent little base station;
43) redistribute the frequency spectrum resource of each adjacent little base station, and generate frequency spectrum resource assignment signalling, send to each adjacent little base station.
In step 42) in, described available spectrum resources is: in total frequency spectrum resource, the frequency spectrum resource of remainder except the grand user's frequency spectrum resource distributed to each adjacent little base station and be labeled as down state.
The schematic flow sheet of preferred embodiment as shown in Figure 2, comprises the following steps:
1) receive the Signal to Interference plus Noise Ratio of each frequency spectrum resource that each adjacent little base station terminal detects in real time, by Signal to Interference plus Noise Ratio lower than predetermined threshold value and the frequency spectrum resource of interference source other little base stations non-, be labeled as macro base station user and use frequency spectrum resource;
2) in preset period of time, adding up each period internal labeling is macro base station user frequency spectrum resource number;
3) according to the statistics of last time same preset period of time, predict the macro base station user frequency spectrum resource number in each adjacent little base station range in next same preset period of time, and be labeled as down state; And the statistics of preserving in each preset period of time;
4) frequency spectrum resource receiving each adjacent little base station distributes request, and the frequency spectrum resource service condition according to each adjacent little base station calculates frequency spectrum resource allocation result, and generates frequency spectrum resource assignment signalling, is sent to each adjacent little base station.
Preferably, step 4) comprise the following steps:
41) frequency spectrum resource receiving each adjacent little base station distributes request, judges whether available spectrum resources meets resource allocation request, if meet, then enters step 42), otherwise, enter step 43);
42) be each adjacent little base station user terminal distribution available spectrum resources, and generate frequency spectrum resource assignment signalling, send to each adjacent little base station;
43) redistribute the frequency spectrum resource of each adjacent little base station, and generate frequency spectrum resource assignment signalling, send to each adjacent little base station.
As shown in Figure 3, for implement said method a kind of little base station set in the embodiment of device of resource allocation, comprise message processing module 11, statistical module 12, computing module 13 and Signalling exchange module 14:
Message processing module 11: the Signal to Interference plus Noise Ratio of each frequency spectrum resource that each adjacent little base station 2 terminal forwarded for receiving Signalling exchange module 14 detects in real time, by Signal to Interference plus Noise Ratio lower than predetermined threshold value and the frequency spectrum resource of interference source other little base stations non-, be labeled as macro base station user and use frequency spectrum resource; Preserve mark result, and preserve the statistics of statistical module 12 and computing module 13 to the frequency spectrum resource allocation result of each adjacent little base station;
Statistical module 12: in preset period of time, adding up each period internal labeling is macro base station user frequency spectrum resource number;
Computing module 13: for the statistics according to last time same preset period of time, predicts the macro base station user frequency spectrum resource number in each adjacent little base station 2 coverage in next same preset period of time, and is labeled as down state; The frequency spectrum resource receiving each adjacent little base station 2 that Signalling exchange module 14 forwards distributes request, and the frequency spectrum resource service condition according to each adjacent little base station 2 calculates frequency spectrum resource allocation result and is sent to Signalling exchange module 14;
Signalling exchange module 14: the Signal to Interference plus Noise Ratio of each frequency spectrum resource that each adjacent little base station terminal sent for receiving each adjacent little base station 2 detects in real time, and be forwarded to message processing module 11; The frequency spectrum resource receiving each adjacent little base station 2 distributes request, and described request is sent to computing module 13, receives the frequency spectrum resource allocation result of computing module 13 and generates frequency spectrum resource assignment signalling, being sent to each adjacent little base station 2.
Preferably, described computing module 13 calculates frequency spectrum resource allocation result according to the frequency spectrum resource service condition of each adjacent little base station 2, is specially:
Judge whether available spectrum resources meets resource allocation request, if meet, be then each adjacent little base station user terminal distribution available spectrum resources, distribution frequency spectrum resource result is sent to Signalling exchange module 14; Otherwise redistribute the frequency spectrum resource of each adjacent little base station, and distribution frequency spectrum resource result is sent to Signalling exchange module 14;
Described available spectrum resources is: in total frequency spectrum resource, the frequency spectrum resource of remainder except the grand user's frequency spectrum resource distributed to each adjacent little base station and be labeled as down state.
In actual deployment, the frequency spectrum resource of little base station centralized management equipment to the multiple adjacent little base station under access device same in local return network or convergence device is managed concentratedly, equipment room Signalling exchange can be made more timely, and therefore the concrete enforcement of the program is for the centralized management to the multiple adjacent little base station of enterprises.Deploy the network architecture of little base station centralized management equipment as shown in Figure 4, little base station centralized management equipment 1 is connected with 22 with adjacent little base station 21 by return network P, and through too small base-station gateway A accessing Internet.A little base station centralized management equipment can be connected with Multiple Small Cell Sites, and a little base station is only connected with a little base station centralized management equipment, namely a little base station centralized management equipment can manage Multiple Small Cell Sites simultaneously, is in the adjacent little base station each other, all little base station under same little BTS management equipment.
The little base station number of maximum ALARA Principle of a little base station centralized management equipment determines according to the memory capacity of little base station centralized management equipment and arithmetic speed.
Described message processing module 11 is for collecting and storing each adjacent little base station frequency spectrum resource distribution condition, the Signal to Interference plus Noise Ratio of the frequency spectrum resource detected in real time with each little base station is compared, for Signal to Interference plus Noise Ratio lower than certain thresholding (as getting SINR<2dB) and the resource of interference source other little base stations non-, mark it to be used by macro base station user, storage mark result, and be supplied to statistical module 12.
The lower explanation of Signal to Interference plus Noise Ratio of a certain sub-band its used by multiple user, therefore the interference be subject to is comparatively serious, little base station centralized management equipment is according to the adjacent little base station resource distribution condition stored, can differentiate which resource is used by little base station user, all the other Signal to Interference plus Noise Ratio are lower and cannot judge again the resource of its interference source, can rationally estimate its use by macro base station user.
Statistics, for being labeled as by what receive in the period statistics each period pre-set the resource quantity used by macro base station user, is supplied to computing module 13 by described statistical module 12.
Preferably, timing statistics section can be arranged according to the functional area characteristic of little base station deployment position, and such as the building such as office building, factory can be divided into working hour and next period; Market, amusement park can be divided into working day and two periods of festivals or holidays; Residential quarter can be divided into daytime and night two statistical time ranges, etc.
The division methods of time period be not limited to above-mentioned list several, can need to carry out other with handling characteristics according to user and arrange.The division of period is also not limited to and is divided into two periods, for the little base station centralized management equipment having good computing ability, suggestion carries out more careful division to the period, adds up more accurately, will contribute to the accuracy promoting subsequent prediction result.
Described computing module 13 is for completing following two functions: Section 1, in the finish time of a period, according to the frequency spectrum resource use amount to the macro base station user in each adjacent little base station range in the statistics prediction next period of next period in statistics period in past one, the frequency spectrum resource of respective numbers is labeled as down state, keeps for the grand user in little base station range to use.Section 2, according to the resource allocation request of little base station and the resource service condition computational resource allocation result of current each little base station, is supplied to Signalling exchange module 14 and forms resource allocation signal by allocation result, and is sent to message processing module 11 and stores.
Signalling exchange module 14 for receiving the resource allocation request of base station 21,22 from childhood, and submits to computing module 13 to process; And the result receiving computing module 13 forms resource allocation signal, sends to little base station 21,22.
Preferably, the setting in described statistics period should match with the division of statistical time range, such as the building such as office building, factory, the Mon-Fri that can arrange weekly is statistics period, be divided into working hour and two statistical time ranges of next period, according in the working day in past to grand user's statistical information of working hour or next period, the frequency spectrum resource use amount for the grand user of next working hour or next period is predicted.
The length in statistics period should be arranged according to statistics needs, and for the little base station centralized management equipment having larger memory capacity, suggestion arranges longer statistics period, can reduce the predicated error that sporadic traffic fluctuation brings, and improves the accuracy of prediction.
Fig. 5 provides the operative scenario figure of the apparatus and method of resource allocation in a kind of little base station set, and concrete steps are as follows:
(1) mobile communication network operator or household equipment manufacturer arrange little base station centralized management equipment 1 in little base station communication system network, and little base station centralized management equipment is connected with little base station 21, little base station 22 through return network P.
(2) little base station 21 and little base station 22 are deployed in residential quarter 31 and 32 respectively, little base station centralized management equipment pre-set daytime and night two statistical time ranges, statistics period is 7 days.The total available band of supposing the system is divided into 3 sections, is expressed as sub-band F1, F2, F3.Little base station centralized management equipment 1 is that the user of little base station 21 distributes sub-band F1, for the user of little base station 22 distributes sub-band F2.
(3) the Signal to Interference plus Noise Ratio situation of little base station 21 periodic detection frequency domain resource, testing result, all lower than the thresholding preset, is reported little base station centralized management equipment 1 by the Signal to Interference plus Noise Ratio of testing result display F2, F3.
(4) little base station centralized management equipment 1 is according to the resource allocation conditions stored, and judge that the interference source of F2 is the user of little base station 22, interference source other little base stations non-of F3, judge that F3 is used by the user 51 of macro base station 5.
(5) little base station centralized management equipment 1 was added up the resource usage quantity of macro base station user in each period according to the period pre-set, frequency spectrum resource quantity at the end of a period required for the macro base station user in each little base station range in the statistics prediction next period of period next in one period of past, the frequency spectrum resource of respective numbers is labeled as down state, keeps for the macro base station user in little base station range to use.
Preferably, frequency spectrum resource use amount can be considered as a kind of time series with obvious periodic characteristic, the methods such as autoregressive moving-average model (AutoregressiveMovingAverageModel, ARMA), neural network model can be adopted to predict.Time series analysis method also has a lot, only enumerates herein but is not limited to the above several method enumerated.
(6) little base station user terminal 41 initiates new service request, little base station 21 forms resource allocation request signaling according to this request and sends to little base station centralized management equipment 1, little base station centralized management equipment 1 according to the resource service condition of the described signaling received and current each little base station, computational resource allocation result.
If there is available spectrum resources and can meet resource allocation request, then little base station centralized management equipment 1 distributes available spectrum resources for little base station user terminal 41, and forms resource allocation signal and send to little base station 21.If do not have available spectrum resources or available spectrum resources deficiency, then little base station centralized management equipment 1 is for redistributing resource in managed each little base station.
In Figure 5, mark H is core net, and B is macro base station gateway.
Below provide a little base station centralized management equipment for redistributing the embodiment of resource in managed each little base station.Centralized management equipment ordinary priority when access customer number is less in little base station is the best resource of user's allocated channel condition, band resource multiplex distance is far away, along with increasing of access customer number, the band resource that channel condition is good has been divided gradually, the available spectrum resources that now just there will be new access user is not enough, needs to redistribute resource to each little base station with nearer band resource multiplex distance.
As shown in Figure 6, the total available band of supposing the system is divided into 3 sections, is expressed as sub-band F1, F2 and F3.Each user needs to take a sub-band and carries out service communication.1 ~ No. 4 little base station cell 61 ~ 64 is had in region, a user is respectively had in 1 ~ No. 3 community 61 ~ 63, little base station centralized management equipment is assigned with F1 ~ F3 sub-band for user, do not have user in No. 4 communities 64, therefore little base station centralized management equipment distributes special service communication frequency band to No. 4 communities 64.
When there being new user to access in No. 4 communities 64, now do not have remaining sub-band resource can carry out service communication for new user in system, therefore little base station centralized management equipment is that sub-band is redistributed in each little base station, shorten frequency band multiplex distance, be that No. 1 user distributes sub-band F1, being that No. 2 users distribute sub-band F2, is that No. 3 users distribute sub-band F3, is that No. 4 users distribute sub-band F4.
The resource allocation problem of practical application scene is comparatively complicated, and preferably, the method that little base station centralized management equipment redistributes resource for managed each little base station can adopt graph theory or heuritic approach as genetic algorithm, simulated annealing etc.Only enumerate herein but be not limited to the above several method enumerated.
The above is only the preferred embodiment of the present invention; it should be pointed out that the technical staff for technology neighborhood, under the premise without departing from the principles of the invention; can also make some changes and retouching, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. the method for resource allocation in little base station set, is characterized in that:
Little base station centralized management equipment is configured in little base station communication system, at least one adjacent little base station is made to be connected to little base station centralized management equipment by passback net, and managed by this little base station centralized management equipment, each adjacent little base station is only connected to a little base station centralized management equipment, and this little base station centralized management equipment implements following steps:
1) receive the Signal to Interference plus Noise Ratio of each frequency spectrum resource that each adjacent little base station terminal detects in real time, by Signal to Interference plus Noise Ratio lower than predetermined threshold value and the frequency spectrum resource of interference source other little base stations non-, be labeled as macro base station user and use frequency spectrum resource;
2) in preset period of time, adding up each period internal labeling is macro base station user frequency spectrum resource number;
3) according to the statistics of last time same preset period of time, predict the macro base station user frequency spectrum resource number in each adjacent little base station range in next same preset period of time, and be labeled as down state; And the statistics of preserving in each preset period of time;
4) frequency spectrum resource receiving each adjacent little base station distributes request, and the frequency spectrum resource service condition according to each adjacent little base station calculates frequency spectrum resource allocation result, and generates frequency spectrum resource assignment signalling, is sent to each adjacent little base station.
2. method as claimed in claim 1, is characterized in that:
Step 4) comprise the following steps:
41) judge whether available spectrum resources meets resource allocation request, if meet, then enter step 42), otherwise, enter step 43);
42) be each adjacent little base station user terminal distribution available spectrum resources, and generate frequency spectrum resource assignment signalling, send to each adjacent little base station;
43) redistribute the frequency spectrum resource of each adjacent little base station, and generate frequency spectrum resource assignment signalling, send to each adjacent little base station.
3. method as claimed in claim 2, it is characterized in that: in step 42) in, described available spectrum resources is: in total frequency spectrum resource, the frequency spectrum resource of remainder except the grand user's frequency spectrum resource distributed to each adjacent little base station and be labeled as down state.
4. a little base station centralized management equipment, is characterized in that: comprise message processing module, statistical module, computing module and Signalling exchange module:
Message processing module: the Signal to Interference plus Noise Ratio of each frequency spectrum resource that each adjacent little base station terminal for receiving Signalling exchange module forwards detects in real time, by Signal to Interference plus Noise Ratio lower than predetermined threshold value and the frequency spectrum resource of interference source other little base stations non-, be labeled as macro base station user and use frequency spectrum resource; Preserve mark result, and preserve the statistics of statistical module and computing module to the frequency spectrum resource allocation result of each adjacent little base station;
Statistical module: in preset period of time, adding up each period internal labeling is macro base station user frequency spectrum resource number;
Computing module: for the statistics according to last time same preset period of time, predicts the macro base station user frequency spectrum resource number in each adjacent little base station range in next same preset period of time, and is labeled as down state; The frequency spectrum resource receiving each adjacent little base station of Signalling exchange module forwards distributes request, and the frequency spectrum resource service condition according to each adjacent little base station calculates frequency spectrum resource allocation result and is sent to Signalling exchange module;
Signalling exchange module: the Signal to Interference plus Noise Ratio of each frequency spectrum resource that each adjacent little base station terminal sent for receiving each adjacent little base station detects in real time, and be forwarded to message processing module; The frequency spectrum resource receiving each adjacent little base station distributes request, and described request is sent to computing module, receives the frequency spectrum resource allocation result of computing module and generates frequency spectrum resource assignment signalling, being sent to each adjacent little base station.
5. equipment as claimed in claim 4, is characterized in that:
Described computing module calculates frequency spectrum resource allocation result according to the frequency spectrum resource service condition of each adjacent little base station, is specially:
Judge whether available spectrum resources meets resource allocation request, if meet, be then each adjacent little base station user terminal distribution available spectrum resources, distribution frequency spectrum resource result is sent to Signalling exchange module; Otherwise redistribute the frequency spectrum resource of each adjacent little base station, and distribution frequency spectrum resource result is sent to Signalling exchange module;
Described available spectrum resources is: in total frequency spectrum resource, the frequency spectrum resource of remainder except the grand user's frequency spectrum resource distributed to each adjacent little base station and be labeled as down state.
6. a little base station communication system for centralized distribution resource, is characterized in that:
Comprise little base station, little base station centralized management equipment, by configuring little BTS management equipment, at least one adjacent little base station is made to be connected to a little base station centralized management equipment by passback net, and managed by this little base station centralized management equipment, each adjacent little base station is only connected to a little base station centralized management equipment, and described little base station centralized management equipment connects gateway;
The Signal to Interference plus Noise Ratio of each frequency spectrum resource of described little base station for receiving user terminal and detecting in real time, and this testing result is sent to little base station centralized management equipment, also for the request according to user terminal, send frequency spectrum resource and distribute request to little base station centralized management equipment, and receive the frequency spectrum resource assignment signalling of little base station centralized management equipment, provide frequency spectrum resource to the user terminal in coverage;
Described little base station centralized management equipment comprises message processing module, statistical module, computing module and Signalling exchange module:
Message processing module: the Signal to Interference plus Noise Ratio of each frequency spectrum resource that each adjacent little base station terminal for receiving Signalling exchange module forwards detects in real time, by Signal to Interference plus Noise Ratio lower than predetermined threshold value and the frequency spectrum resource of interference source other little base stations non-, be labeled as macro base station user and use frequency spectrum resource; Preserve mark result, and preserve the statistics of statistical module and computing module to the frequency spectrum resource allocation result of each adjacent little base station;
Statistical module: in preset period of time, adding up each period internal labeling is macro base station user frequency spectrum resource number;
Computing module: for the statistics according to last time same preset period of time, predicts the macro base station user frequency spectrum resource number in each adjacent little base station range in next same preset period of time, and is labeled as down state; The frequency spectrum resource receiving each adjacent little base station of Signalling exchange module forwards distributes request, and the frequency spectrum resource service condition according to each adjacent little base station calculates frequency spectrum resource allocation result and is sent to Signalling exchange module;
Signalling exchange module: the Signal to Interference plus Noise Ratio of each frequency spectrum resource that each adjacent little base station terminal sent for receiving each adjacent little base station detects in real time, and be forwarded to message processing module; The frequency spectrum resource receiving each adjacent little base station distributes request, and described request is sent to computing module, receives the frequency spectrum resource allocation result of computing module and generates frequency spectrum resource assignment signalling, being sent to each adjacent little base station.
7. equipment as claimed in claim 6, is characterized in that:
Described computing module calculates frequency spectrum resource allocation result according to the frequency spectrum resource service condition of each adjacent little base station, is specially:
Judge whether available spectrum resources meets resource allocation request, if meet, be then each adjacent little base station user terminal distribution available spectrum resources, distribution frequency spectrum resource result is sent to Signalling exchange module; Otherwise redistribute the frequency spectrum resource of each adjacent little base station, and distribution frequency spectrum resource result is sent to Signalling exchange module;
Described available spectrum resources is: in total frequency spectrum resource, the frequency spectrum resource of remainder except the grand user's frequency spectrum resource distributed to each adjacent little base station and be labeled as down state.
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Effective date of registration: 20210902 Address after: Siming District of Xiamen city in Fujian Province, 361000 South Siming Road No. 422 Patentee after: XIAMEN University Patentee after: Jingxin Network System Co.,Ltd. Address before: Xiamen City, Fujian Province, 361005 South Siming Road No. 422 Patentee before: XIAMEN University Patentee before: COMBA TELECOM SYSTEMS (GUANGZHOU) Ltd. |