CN103763777B - A kind of control method of heterogeneous network and base station - Google Patents
A kind of control method of heterogeneous network and base station Download PDFInfo
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- CN103763777B CN103763777B CN201310716593.7A CN201310716593A CN103763777B CN 103763777 B CN103763777 B CN 103763777B CN 201310716593 A CN201310716593 A CN 201310716593A CN 103763777 B CN103763777 B CN 103763777B
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Abstract
The present invention provides control method and the base station of a kind of heterogeneous network, wherein, control method includes：When terminal meets resident condition, micro-base station is sent to the terminal allows resident instruction, so that the terminal resides in the micro-base station；The micro-base station receives the service request that the terminal is sent, according to the type of the service request to the unappropriated Radio Resource of terminal distribution macro base station.Due to, macro base station user is the same Radio Resource of user occupancy of macro base station and micro-base station to the interference main cause of micro-base station, so, micro-base station is the unappropriated Radio Resource of macro base station for the Radio Resource of the terminal distribution, the problem of co-channel interference can either being avoided, will not have any impact to the resource utilization of macro base station again.
Description
Technical field
The present invention relates to communication technical field, and in particular to a kind of control method of heterogeneous network and base station.
Background technology
With the fast development of mobile communication technology, requirement more and more higher of the people to communication network, in order to meet user
Network is experienced in higher demand, cellular network and introduce heterogeneous network（Heterogeneous Network, Het
Net）To reach the purpose for improving frequency spectrum resource utilization rate.HetNet refers to covering in traditional cellular network macro base station
In cover area, then dispose several low power nodes（That is micro-base station）, form the different of the different node types with identical covering
Construction system.
Because the macro base station in HetNet networks and micro-base station take same Radio Resource, macro base station edge customer meeting
Stronger uplink interference is produced to the edge customer of micro-base station, this serious interference influences the throughput of HetNet networks.For
Uplink interference of the edge customer to micro-base station of macro base station is reduced, HetNet introduces enhancement type district interference coordination（E
Nhanced Inter-cell Interference Coordination, eICIC）Technology, by grand base
Blank subframe is set in the data frame stood（AlmostBlank Subframe, ABS）Mode so that micro-base station
By its edge customer scheduling on ABS, descending interference of the macro base station to micro-base station edge customer can be so reduced, to carry
Rise micro- station throughput.This method for reducing interference is by way of sacrificing macro base station Radio Resource, to reach reduction to micro- station
The purpose of interference, therefore, although this method can reduce interference, the resource utilization of macro base station is but a greater impact.
The content of the invention
In order to solve the above-mentioned technical problem, the embodiment of the present invention provides control method and the base station of a kind of heterogeneous network, with
Interference of the macro base station to micro-base station is reduced, and ensures that the resource utilization of macro base station is unaffected.
Therefore, the embodiment of the present invention provides following technical scheme：
In a first aspect, the embodiment of the present invention provides a kind of control method of heterogeneous network, methods described includes：
When terminal meets resident condition, micro-base station is sent to the terminal allows resident instruction, so that the terminal is stayed
Stay in the micro-base station；
The micro-base station receives the service request that the terminal is sent, according to the type of the service request to the terminal
Distribute the unappropriated Radio Resource of macro base station.
In the first possible implementation of first aspect, the type according to the service request is to the end
The end distribution unappropriated Radio Resource of macro base station, including：
The micro-base station obtains the wireless resource information shared by the macro base station, determines the unappropriated nothing of the macro base station
Line resource；
The micro-base station selects from identified Radio Resource to meet the wireless of business demand according to service request type
Resource, is the selected resource of the terminal distribution.
It is described according to the service request type in second of possible implementation of first aspect, to the end
The end distribution unappropriated Radio Resource of macro base station, including：
The micro-base station sends the wireless money shared by the access information and this micro-base station of the terminal to the macro base station
Source information, so that wireless resource information of the macro base station according to shared by the access information and the micro-base station of the terminal is
The micro-base station formulates radio resource allocation scheme；
The micro-base station receives the radio resource allocation scheme that the macro base station is sent, according to the radio resource allocation side
Case is to the terminal distribution Radio Resource.
It is described according to the service request type in the third possible implementation of first aspect, to the end
The end distribution unappropriated Radio Resource of macro base station, including：
The Radio Resource shared with macro base station is divided at least two resource collections, described at least two by the micro-base station
Resource area is corresponded with the region that Microcell is divided；It is exclusively used at least two resource collection including at least one
Dedicated resource sets to user's distributing radio resource of Microcell fringe region；
The micro-base station obtains the region belonging to the terminal, and according to service request type by the corresponding resource in the region
Radio resource allocation in set gives the terminal, wherein, the micro-base station is Microcell side from the dedicated resource sets
The Radio Resource that the wireless resource block that the user in edge region is distributed is distributed with macro base station by the user of macrocell fringe region
Block is different.
With reference to the first or second or the third possible implementation of first aspect or first aspect, the 4th
Plant in possible implementation, methods described also includes：
The micro-base station sends the wireless resource information shared by this micro-base station to the macro base station, so that the macro base station
To access the unappropriated Radio Resource of this micro-base station described in the terminal distribution of this macro base station.
With reference to the first or second or the third or the 4th kind of possible realization side of first aspect or first aspect
Formula, in the 5th kind of possible implementation, when unappropriated resource is not present in the macro base station, methods described also includes：
The micro-base station selects at least one stand-by terminal, and the distance between the stand-by terminal and the terminal are more than pre-
If threshold value；
The micro-base station is according to the service request type of the terminal, from the nothing shared by least one described stand-by terminal
Shared resource is determined in line resource, and the shared resource is distributed into the terminal.
With reference to the first or second or the third or the 4th kind or the 5th kind of possibility of first aspect or first aspect
Implementation, in the 6th kind of possible implementation, the micro-base station determines that the terminal is met and stayed in the following manner
Condition is stayed, including：
The micro-base station measures the uplink loss LLup1 of the terminal；
The micro-base station obtains the uplink loss LLup2 of the terminal of the macro base station measurement；
The micro-base station judges whether the uplink loss LLup1 is less than uplink loss LLup2；
When the uplink loss LLup1 is less than uplink loss LLup2, the micro-base station determines institute
State terminal and meet resident condition.
With reference to the 6th kind of possible implementation of first aspect, in the 7th kind of possible implementation, micro- base
The uplink loss LLup1 for measuring terminals of standing, including：
The micro-base station receives the measurement report that the terminal is reported, according to the information on path loss in the measurement report
Calculate uplink loss LLup1；Or,
The micro-base station calculates the radio transmission distance between the terminal and this micro-base station, according to the distance meter calculated
Calculate uplink loss LLup1.
Second aspect includes the embodiments of the invention provide a kind of base station, the base station：
Transmitting element, for when terminal meets resident condition, being sent to the terminal to allow resident instruction, so that described
Terminal resides in the micro-base station；
Receiving unit, for receiving the service request that the terminal is sent；
Allocation unit, for the type according to the service request to the unappropriated wireless money of the terminal distribution macro base station
Source.
In the first possible implementation of second aspect, the allocation unit includes：
First acquisition module, for obtaining the wireless resource information shared by the macro base station, determines the macro base station not
The Radio Resource of occupancy；
First distribute module, for being selected to meet business demand from identified Radio Resource according to service request type
Radio Resource, be the selected resource of the terminal distribution.
In second of possible implementation of second aspect, the allocation unit includes：
First sending module, for being sent to the macro base station shared by the access information and this micro-base station of the terminal
Wireless resource information, so that wireless money of the macro base station according to shared by the access information and described micro-base station of the terminal
Source information is that described micro-base station formulates radio resource allocation scheme；
First receiving module, for receiving the radio resource allocation scheme that the macro base station is sent；
Second distribute module, for according to the radio resource allocation scheme to the terminal distribution Radio Resource.
In the third possible implementation of second aspect, the allocation unit includes：
Division module, for the Radio Resource shared with macro base station to be divided into at least two resource collections, it is described at least
Two resource areas are corresponded with the region that Microcell is divided；One is comprised at least at least two resource collection specially
Dedicated resource sets for user's distributing radio resource to Microcell fringe region；
3rd distribute module, for obtaining the region belonging to the terminal, and according to service request type by the region pair
Radio resource allocation in the resource collection answered gives the terminal, is Microcell fringe region from the dedicated resource sets
The wireless resource block that user is distributed is different from the wireless resource block that macro base station is distributed by the user of macrocell fringe region.
With reference to the first or second or the third possible implementation of second aspect or second aspect, the 4th
Plant in possible implementation, the base station also includes：
Resource information transmitting element, for sending the wireless resource information shared by this micro-base station to the macro base station, with
Make the macro base station to access the unappropriated Radio Resource of this micro-base station described in the terminal distribution of this macro base station.
With reference to the first or second or the third or the 4th kind of possible realization side of second aspect or second aspect
Formula, in the 5th kind of possible implementation, when unappropriated resource is not present in the macro base station, the base station also includes：
Selecting unit, for selecting at least one stand-by terminal, the stand-by terminal and the distance between the terminal are big
In predetermined threshold value；
Shared cell, for the type of the service request according to the terminal, from shared by least one described stand-by terminal
Shared resource is determined in Radio Resource, and the shared resource is distributed into the terminal.
With reference to the first or second or the third or the 4th kind or the 5th kind of possibility of second aspect or second aspect
Implementation, in the 6th kind of possible implementation, the base station also includes：
Loss measurement unit, the uplink loss LLup1 for measuring the terminal；
Acquiring unit is lost, the uplink loss LLup2 of the terminal for obtaining the macro base station measurement；
Judging unit, for judging whether the uplink loss LLup1 is less than uplink loss LLup
2；
Determining unit, for when uplink loss LLup1 is less than uplink loss LLup2, determining institute
State terminal and meet resident condition.
With reference to the 6th kind of possible implementation of second aspect, in the 7th kind of possible implementation, the loss
Measuring unit, specifically for receiving the measurement report that the terminal is reported, according to the information on path loss in the measurement report
Calculate uplink loss LLup1；Or,
The loss measurement unit, specifically for calculating the radio transmission distance between the terminal and this micro-base station, root
Uplink loss LLup1 is calculated according to the distance calculated.
A kind of control method of heterogeneous network of the embodiment of the present invention and base station, macro base station can either be reduced to micro- to reach
The interference of base station, improves the throughput of micro-base station, and does not influence the purpose of the resource utilization of macro base station.It is to work as the end first
When end meets resident condition, the micro-base station is sent to the terminal allows resident instruction so that the terminal reside in it is described
Micro-base station；The terminal is resided in after base station, when terminal has business demand, and terminal can send business to be resident base station
Request, therefore, the micro-base station receive the service request that the terminal is sent, then, according to the type of service request to described
The unappropriated Radio Resource of terminal distribution macro base station, because macro base station user is macro base station to the interference main cause of micro-base station
The same Radio Resource with the user occupancy of micro-base station, so, micro-base station is macro base station for the Radio Resource of the terminal distribution
Unappropriated Radio Resource, the problem of can either avoiding co-channel interference will not cause to appoint to the resource utilization of macro base station again
What influences.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments described in application, for those of ordinary skill in the art, can also obtain other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the flow chart of the control method embodiment 1 of heterogeneous network of the embodiment of the present invention；
Fig. 2 is the flow chart of the resource allocation methods embodiment 1 shown in the embodiment of the present invention；
Fig. 3 is the flow chart of the resource allocation methods embodiment 2 shown in the embodiment of the present invention；
Fig. 4 is the flow chart of the resource allocation methods embodiment 3 shown in the embodiment of the present invention；
Fig. 5 is the schematic diagram of HetNet of embodiment of the present invention local resources distribution；
Fig. 6 is the flow chart of the control method embodiment 2 of heterogeneous network of the embodiment of the present invention；
Fig. 7 is the flow chart of terminal staying method of the embodiment of the present invention；
Fig. 8 is the structure chart of base station embodiment of the embodiment of the present invention 1；
Fig. 9 is the structure chart of base station embodiment of the embodiment of the present invention 2；
Figure 10 is the hardware structure diagram of base station of the embodiment of the present invention.
Embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the accompanying drawings with embodiment to this
Inventive embodiments are described in further detail.
Refering to Fig. 1, the flow chart of the control method embodiment 1 of the heterogeneous network of the embodiment of the present invention shown, this method can
Including：
Step 101, when terminal meets resident condition, micro-base station is sent to the terminal allows resident instruction, so that institute
State terminal and reside in the micro-base station.
Heterogeneous network（Heterogeneous Network, HetNet）The terminal type that middle base station is serviced is more
Plant various, such as：Mobile phone, notebook, vehicle-mounted computer etc., the service that these terminals will obtain heterogeneous network have to first reside in
Under some base station in heterogeneous network, allow the base station to provide service for it, enter below by taking mobile phone terminal in heterogeneous network as an example
Row is illustrated.
It is first begin to measure a range of base station in HetNet, after mobile phone power-on（Macro base station and micro-base station）
The signal launched, and according to signal intensity（Such as：Received signal code power（Received Signal Code Po
Wer, RSCP）, or, received signal strength indicator（Received Signal Strength Indicato
R, RSSI）, or, downlink reference signal receiving power（Reference Signal Received Power,
RSRP））Size be compared, or, can also be according to received signal quality（Ec/No signal to noise ratio）Quality progress
Compare.Then, which base station strength is big or received signal quality is good, and which base station mobile phone just belongs to, that is, resides in
Which base station.Such as：When mobile phone is in the center of micro-base station overlay area, the descending ginseng for the micro-base station that mobile phone for measuring is arrived
Examine signal intensity be more than macro base station downlink reference signal intensity when, mobile phone just selects to reside in micro-base station, then to micro-base station
Resident request is sent, when micro-base station confirms that mobile phone meets resident condition, being sent to mobile phone allows resident instruction, and then mobile phone is just stayed
Micro-base station is stayed in, service is provided for mobile phone by micro-base station.
Step 102, the micro-base station receives the service request that the terminal is sent, according to the service request type to institute
State the unappropriated Radio Resource of terminal distribution macro base station.
Mobile phone is resided in after micro-base station, and to send business to be resident micro-base station when mobile phone has business demand please
Ask, the service request at least includes type of service, the type of service may include ip voice, web page browsing, data transfer, file
Download, video calling and streaming media service etc. any one, the resource size needed for different types of service is different, and base station will
According to type of service for needed for terminal distribution resource.
Micro-base station is received after the service request of mobile phone transmission, and the service request is passed through into last layer wireless network control
Device（Radio Network Controller, RNC）, then, the whether available free resource in base station is inquired by RNC,
If so, then base station reports the available free resources of RNC, and the signaling for carrying resource allocation information is sent to terminal, then eventually
Hold the channel according to specified by the resource information access base station distributed.It should be noted that in long evolving system（Long
Term Evolution, LTE）It is middle to concentrate on RNC functions in base station or core net, so above-mentioned RN
The operation that C is performed all is operated by base station or core net.
Macro base station and micro-base station are disposed with frequency in HetNet, that is to say, that macro base station and micro-base station possess equally
Frequency spectrum resource, interference of the embodiment of the present invention in order to avoid macro base station to the user of micro-base station specifically refer to macro base station
Co-channel interference between the edge termination of micro-base station.This is primarily due to, the center that macro base station and micro-base station are each covered
Terminal is produced even if macro base station and the respective center terminal of micro-base station take same resource block in itself at a distance of distant
Co-channel interference also can be neglected, therefore, the co-channel interference of macro base station of interest and micro-base station in current HetNet networks
Generally refer to the co-channel interference between macro base station and the edge termination of micro-base station.
After the present invention program, no matter edge termination or center terminal, can avoid between macro base station and micro-base station
Co-channel interference.Certainly, the embodiment of the present invention can also apply the scene in the edge termination for only focusing on macro base station and micro-base station
Under, it is not specifically limited herein.
When the terminal that micro-base station is serviced needs Radio Resource, micro-base station will consider the wireless money that macro base station currently takes
The situation in source, finally, selected from the unappropriated Radio Resource of macro base station some meet the radio resource allocation of business demand to
Terminal.So so that the terminal that micro-base station the is serviced Radio Resource different with the terminal occupancy that macro base station is serviced, it becomes possible to
The problem of avoiding co-channel interference between macro base station and micro-base station, will not also have any impact to the resource utilization of macro base station.
The control method of embodiments of the present invention heterogeneous network, be substantially exactly, after terminal resides in micro-base station,
When terminal has business demand, terminal can send service request to be resident base station, and the micro-base station receives the terminal hair
The service request sent, according to service request type to the unappropriated Radio Resource of terminal distribution macro base station.Due to macro base station
User be to the interference main cause of micro-base station macro base station and micro-base station the same Radio Resource of user occupancy caused by with frequency
Interference, so, micro-base station is the unappropriated Radio Resource of macro base station for the Radio Resource of the terminal distribution, can either be avoided same
The problem of frequency is disturbed, will not have any impact to the resource utilization of macro base station again.
Need explanation when, the control method of heterogeneous network of the embodiment of the present invention can apply to any one using orthogonal
Frequency division multiplexing（OrthogonalFrequency Division Multiplexing, OFDM）Technology
In heterogeneous network system, only it is explained below by taking LTE heterogeneous network systems as an example.
For above-mentioned micro-base station according to the service request type to the unappropriated wireless money of the terminal distribution macro base station
The mode in source, the embodiment of the present invention additionally provides following three kinds of implementations.
The first implementation, refering to Fig. 2, the flow chart of the resource allocation methods embodiment 1 shown, this method includes：
Step 201, the micro-base station obtains the wireless resource information shared by the macro base station, determines the macro base station not
The Radio Resource of occupancy.
It is described micro- after micro-base station receives the service request that the terminal is sent in LTE heterogeneous network systems
Base station needs to obtain the wireless resource information shared by the macro base station, that is to say, that the micro-base station needs to know described grand
Which Radio Resource base station currently takes, and the micro-base station can be in communication with each other with the macro base station by X2 interface, directly be obtained
Take the resource information shared by the macro base station.When LTE heterogeneous networks are disposed, it has been determined that workable for the network
Radio Resource, that is to say, that Radio Resource workable for macro base station and micro-base station in LTE heterogeneous networks.Taken when knowing
Radio Resource, it is natural it is known which Radio Resource is unoccupied.
Step 202, the micro-base station selects from identified Radio Resource to meet business need according to service request type
The Radio Resource asked, is the selected resource of the terminal distribution.Because the type of service needed for terminal is varied, inhomogeneity
Service rate needed for the business of type is of different sizes, such as voice service rate demand is 5.6k~12.2kbps（Kilobit section is every
Second）, downstream data traffic rate requirement is greater than 384kbps, the Radio Resource size that different types of business needs also not phase
Together, therefore, the micro-base station needs the type of service asked according to terminal, determines to give terminal distribution how many resource blocks（Re
Source Block, RB）To meet the demand of the terminal.Micro-base station can send incoming instruction to the terminal, described to connect
Enter the Radio Resource block message distributed included in instruction, that is, channel information, so that terminal connects according to the channel information
Enter the channel specified by micro-base station.
Second of implementation, refering to Fig. 3, the flow chart of the resource allocation methods embodiment 2 shown, this method includes：
Step 301, the micro-base station is sent shared by the access information and this micro-base station of the terminal to the macro base station
Wireless resource information so that the macro base station is wireless according to shared by the access information and described micro-base station of the terminal
Resource information is that described micro-base station formulates radio resource allocation scheme.
When micro-base station receives the service request of the terminal, by the resource information shared by current micro-base station and this
The access information of terminal, the access information at least includes：Service request type, is sent to macro base station in the lump, is by macro base station
The micro-base station formulates radio resource allocation scheme, and the macro base station is formulating radio resource allocation scheme for the micro-base station
When, it is necessary to consider which RB is micro-base stations currently taken, be currently accessed the service class that the terminal of micro-base station is asked
The factors such as the resource information shared by type, this macro base station, the Radio Resource that the final macro base station is formulated by the micro-base station
Allocative decision.The Resource Allocation Formula specifically refers to the micro-base station and gives the terminal distribution which wireless resource block, and should
Wireless resource block is the resource block that the macro base station does not occupy.
Step 302, the micro-base station receives the radio resource allocation scheme that the macro base station is sent, according to the wireless money
Source allocative decision is to the terminal distribution Radio Resource.
The micro-base station receives the radio resource allocation scheme that the macro base station is its formulation from X2 mouthfuls, and the program refers to
It is which resource block of the terminal distribution to show micro-base station, then the micro-base station is just which resource block of the terminal distribution, with full
The business demand of sufficient terminal.
The third implementation, refering to Fig. 4, the flow chart of the resource allocation methods embodiment 3 shown, this method includes：
Step 401, the Radio Resource shared with macro base station is divided at least two resource collections by the micro-base station, described
At least two resource areas are corresponded with the region that Microcell is divided；One is comprised at least at least two resource collection
The individual dedicated resource sets being exclusively used in user's distributing radio resource of Microcell fringe region；
Step 402, the micro-base station obtains the region belonging to the terminal, and according to service request type by the region pair
Radio resource allocation in the resource collection answered gives the terminal, wherein, the micro-base station is from the dedicated resource sets
What the wireless resource block that the user of Microcell fringe region is distributed was distributed with macro base station by the user of macrocell fringe region
Wireless resource block is different.
When being disposed in HetNet base stations with frequency, macro base station and the sharable Radio Resource of micro-base station have just been planned,
So, the Radio Resource shared with macro base station can be divided at least two resource collections, the area that micro-base station is covered by micro-base station
Domain is referred to as Microcell, while very small cell is divided into at least two regions, at least two resource collection and Microcell institute
At least two regions divided are corresponded.It is exclusively used in giving Microcell side including at least one at least two resource collection
The dedicated resource sets of user's distributing radio resource in edge region, in order to reduce the interference of fringe region user, micro-base station is from institute
State in dedicated resource sets for Microcell fringe region user institute distributing radio resource block be macro base station fringe region use
The wireless resource block that family is not occupied, that is to say, that to reduce the interference to Microcell fringe region user, macro base station should be as far as possible
It is not the wireless resource block that the user of user's distribution Microcell fringe region of macrocell fringe region has taken.Therefore, belong to
When the terminal of micro-base station has business demand, service request is sent to micro-base station, micro-base station is just according to the business demand of the terminal
Size, is its distribution and the Radio Resource in the resource collection corresponding to the region.Wherein, the micro-base station is from the special money
The wireless resource block that source is distributed in gathering by the user of Microcell fringe region and the use that macro base station is macrocell fringe region
The wireless resource block that family is distributed is different.
Certainly, the purpose of interference is reduced in order to preferably reach, macro base station can also draw itself workable Radio Resource
It is divided at least two resource collections, and at least two regions divided with macrocell are corresponded.At least two resource set
The dedicated resource sets being exclusively used in user's distributing radio resource of macrocell fringe region, the set are comprised at least in conjunction
In the wireless resource block dedicated resource sets that can be divided by the user of Microcell fringe region comprising micro-base station included
Wireless resource block.
Above-mentioned resource allocation methods are explained in more detail by taking specific Radio Resource dividing mode as an example below
It is bright.Refering to Fig. 5, the schematic diagram of HetNet of the embodiment of the present invention local resources distribution shown.
For micro-base station, micro-base station by partition of available resources into two resource collections, RB1 and RB2, wherein,
RB1, RB2 refer to the RB logical subsets in LTE subframes, and it not necessarily concentrates arrangement on a physical layer, and having can
Can be variable arranged evenly in position, and RB1, RB2 are not necessarily meant to refer to a resource block, it is also possible to the collection of resource block
Close.Micro-base station according to terminal apart from micro-base station apart from size, very small cell is divided into inner circle region and cylindrical region, cylindrical area
Domain is exactly fringe region, and inner circle region is exactly central area, and cylindrical region is corresponding with RB1, inner circle region with RB2 pairs
Should.That is, for the terminal that micro-base station fringe region is covered, the resource block that micro-base station is distributed in RB1 for it is right
For the terminal that central area is covered, the resource block that micro-base station is distributed in RB2 for it.
For macrocell, macro base station is also by partition of available resources into two resource collections, RB3 and RB4, RB
3rd, RB4 refers to the RB logical subsets in LTE subframes, and it not necessarily concentrates arrangement on a physical layer, it may be possible to
Variable arranged evenly in position, and RB3, RB4 are not necessarily meant to refer to a resource block, it is also possible to the set of resource block.
Macro base station is also, apart from size, macrocell to be divided into inner circle region and cylindrical region according to terminal apart from macro base station, and outside
Circle region is corresponding with RB3, and inner circle region is corresponding with RB4.That is, the terminal for the cylindrical region overlay of macro base station is come
Say, the resource block that macro base station is distributed in RB3 for it, for the terminal of inner circle region overlay, macro base station distributes R for it
Resource block in B4.
Because the RB1 of micro-base station and the RB4 of macro base station stagger in time domain, the RB2 of micro-base station and macro base station
RB4 is the different terminals for being spatially separated by the cylindrical region of micro-base station for distributing to, and macro base station can be by R
The distribution of resource block in B3, it is ensured that the resource block taken in its resource block and micro-base station RB1 and RB2 for distributing when
Domain or frequency domain non-overlapping copies, therefore, if the micro-base station and macro base station in heterogeneous network are partitioned in the above resource and covered
Cover area, and be terminal distribution resource according to overlay area and the one-to-one relation of resource collection, macro base station can either be reduced
To the co-channel interference of micro-base station edge customer, and the resource utilization of macro base station is not influenceed.
The ratio of RB1 and RB2 in Fig. 5, RB3 and RB4 ratio are all can be with micro-base station and Hong Ji
The distribution situation of serviced terminal of standing and being adjusted for loading condition adaptability.Therefore, this resource distribution mode can be with
So that HetNet has the frequency of the adaptivity for following service dynamic to change and good application flexibility, fully lifting network
Compose utilization rate.
It is from the point of view of the resource allocation of micro-base station, in order to which more flexible realization is provided in above-mentioned HetNet
Source is distributed, and can also be macro base station in the terminal distribution resource to be linked into this macro base station, it is considered to the nothing of micro-base station in network
Line occupation condition, based on above-mentioned technical problem, the embodiment of the present invention additionally provides a kind of preferred scheme, is specifically above-mentioned
On the basis of the control method of the embodiment of the present invention 1, methods described also includes：The micro-base station sends this micro- base to the macro base station
Wireless resource information shared by standing, so that the macro base station is vacant to access micro-base station described in the terminal distribution of this macro base station
Radio Resource.
Due to the terminal quantity in HetNet it is more when, it may appear that the load of macro base station and micro-base station all may be higher
Situation, so, when macro base station terminal has occupied all Radio Resources, that is to say, that the macro base station is not present
During unappropriated resource, in order to reduce interference of the macro base station to micro-base station, the embodiment of the present invention additionally provides preferred scheme, ginseng
Fig. 6 is read, the flow chart of the control method embodiment 2 of the heterogeneous network of the embodiment of the present invention shown, this method includes：
Step 601, when the terminal meets resident condition, the micro-base station is sent to the terminal allows resident finger
Order, so that the terminal resides in the micro-base station；
Step 602, the micro-base station receives the service request that the terminal is sent；
The implementation process of step 601~602 can be found in the description of step 101~102, and here is omitted.
Step 603, when unappropriated Radio Resource is not present in the macro base station, the micro-base station selects at least one to treat
With terminal, the distance between the stand-by terminal and the terminal are more than predetermined threshold value；
Step 604, the micro-base station is according to the service request type of the terminal, from least one described stand-by terminal institute
Shared resource is determined in the Radio Resource of occupancy, and the shared resource is distributed into the terminal.
In the present embodiment, when macro base station is by all radio resource allocations to the terminal for accessing this macro base station,
The unappropriated Radio Resource of macro base station is not present in network, in this case, micro-base station resides in this micro-base station by allowing
The terminal and the mode of macro base station terminal common source apart from each other, to reduce the same frequency between macro base station and micro-base station
Interference.Two terminals are apart farther out, even if what the two terminals took is same resource block, interference
Also can be smaller.
Further, since HetNet is different according to footprint size, the overlay area of macro base station and micro-base station is distinguished
Referred to as macrocell and Microcell, wherein, the size of Microcell directly affects the height of HetNet frequency spectrum resource utilization rates, small
The bigger frequency spectrum resource utilization rate of scope in area is higher, on the contrary, the smaller frequency spectrum resource utilization rate of the scope of Microcell is lower, this
Be due to Microcell scope it is smaller, the terminal that it is serviced is fewer, and the utilization rate of frequency spectrum resource is just relatively low, therefore, in order to
Frequency spectrum resource rate rate is improved, just necessarily requires the overlay area of low power nodes as big as possible, that is, require low-power section
The serviced terminal of point is as more as possible.
Prior art is by judging the model split macro base station of UE received signal power sizes and the covering of micro-base station
Scope, because the transmission power of macro base station is several times to tens times of micro-base station transmission power, such as：Generally macro base station
Transmission power be usually 46dBm, the transmission power of micro-base station is usually 30dBm, and the transmission power of macro base station is typically
40 times of micro-base station, therefore, the coverage that Microcell is divided in this way can very little.It can be seen that：Draw in this manner
The macrocell scope separated will be far longer than Microcell scope, and the terminal that micro-base station is serviced is fewer, cause frequency resource profit
It is relatively low with rate, it is impossible to meet network demand.
Based on above-mentioned technical problem, the embodiment of the present invention additionally provides a kind of preferred scheme, can be specifically at above-mentioned
On the basis of a kind of control method embodiment of heterogeneous network, determine that terminal meets resident condition in the following manner, refer to
Fig. 7, the flow chart of the terminal staying method of the embodiment of the present invention shown, this method includes：
Step 701, the micro-base station measures the uplink loss LLup1 of the terminal；
Step 702, the micro-base station obtains the uplink loss LLup2 of the terminal of the macro base station measurement；
Step 703, the micro-base station judges whether the uplink loss LLup1 is less than uplink loss L
Lup2；
Step 704, when the uplink loss LLup1 is less than uplink loss LLup2, micro- base
The determination terminal of standing meets resident condition.
It is preferred that, the uplink loss LLup1 of the micro-base station measuring terminals, including：
The micro-base station receives the measurement report that the terminal is reported, according to the information on path loss in the measurement report
Calculate uplink loss LLup1；Or,
The micro-base station calculates the radio transmission distance between the terminal and this micro-base station, according to the distance meter calculated
Calculate uplink loss LLup1.
Because the link load border such as up of, macrocell and Microcell is more than their descending constant power border, therefore,
The coverage of macro base station and micro-base station is divided by uplink loss, the coverage of Microcell can be extended so that
More terminal attachings add Microcell and are resident termination capacity, pointed out the handling capacity of system in micro-base station.
Further, since the link load border such as up of macrocell and Microcell is more than their descending constant power border,
Therefore, the UE in the two borders can be eventually resulted in Microcell by the strong interference from macro base station downstream signal
Fringe region throughput is reduced, in order to overcome above-mentioned deficiency, is to reside in the up of this micro-base station to wait link load in micro-base station
During UE distributing radio resources in border and descending constant power border, any of above-mentioned three kinds of implementations side can be passed through
Formula, for the Radio Resource needed for UE is distributed, to avoid strong interference of the macro base station to it.
Furthermore, it is contemplated that although some terminals meet above-mentioned uplink loss LLup1 less than uplink loss L
Lup2 condition, but these terminals are possible to not be located in the actual coverage of micro-base station, even if these terminals are returned
Belong to micro-base station, can not also obtain the service of micro-base station, therefore in order to avoid by these terminal attachings, in micro-base station, the present invention is real
Apply example and a kind of preferred scheme is provided, specifically on the basis of the judgement terminal staying method described in above-mentioned Fig. 7, this method is also wrapped
Include：
When the uplink loss LLup1 is less than uplink loss LLup2, in the micro-base station judgement
Whether line link loss LLup1 is less than the maximum uplink loss threshold value of this micro-base station；If being less than, the micro-base station is true
The fixed terminal meets resident condition.Using the above-mentioned preferred scheme of the embodiment of the present invention, micro-base station can be by more accurately sentencing
Whether disconnected terminal meets resident condition.
Control method with embodiments of the present invention heterogeneous network is corresponding, and the embodiments of the invention provide heterogeneous network
Micro-base station in network, refering to Fig. 8, the structure chart of the base station embodiment of the embodiment of the present invention 1 shown, the base station may include：Send
Unit 801, receiving unit 802 and allocation unit 803, with reference to the operation principle of the base station to its inside each unit and inside
Connection is further explained.
Transmitting element 801, for when terminal meets resident condition, allowing resident instruction to terminal transmission, so that
The terminal resides in the micro-base station；
Receiving unit 802, for receiving the service request that the terminal is sent；
Allocation unit 803, for unappropriated wireless to the terminal distribution macro base station according to the service request type
Resource.
It is preferred that, the allocation unit may include：
First acquisition module, for obtaining the wireless resource information shared by the macro base station；
First distribute module, for the unappropriated wireless money of the macro base station according to business demand to the terminal distribution
Source.
It is preferred that, the allocation unit may include：
First sending module, for being sent to the macro base station shared by the access information and this micro-base station of the terminal
Wireless resource information, so that wireless money of the macro base station according to shared by the access information and described micro-base station of the terminal
Source information is that described micro-base station formulates radio resource allocation scheme；
First receiving module, for receiving the radio resource allocation scheme that the macro base station is sent；
Second distribute module, for according to the radio resource allocation scheme to the terminal distribution Radio Resource.
It is preferred that, the allocation unit may include：
Division module, for the Radio Resource shared with macro base station to be divided into at least two resource collections, it is described at least
Two resource areas are corresponded with the region that Microcell is divided；One is comprised at least at least two resource collection specially
Dedicated resource sets for user's distributing radio resource to Microcell fringe region；
3rd distribute module, for obtaining the region belonging to the terminal, and according to service request type by the region pair
Radio resource allocation in the resource collection answered gives the terminal, is Microcell fringe region from the dedicated resource sets
The wireless resource block that user is distributed is different from the wireless resource block that macro base station is distributed by the user of macrocell fringe region.
It is preferred that, the base station may also include：
Resource information transmitting element, for sending the wireless resource information shared by this micro-base station to the macro base station, with
Make the macro base station to access the unappropriated Radio Resource of this micro-base station described in the terminal distribution of this macro base station.
It is preferred that, when unappropriated resource is not present in the macro base station, the base station may also include：
Selecting unit, for selecting at least one stand-by terminal, the stand-by terminal and the distance between the terminal are big
In predetermined threshold value；
Shared cell, for the business demand according to the terminal, from the nothing shared by least one described stand-by terminal
Shared resource is determined in line resource, and the shared resource is distributed into the terminal.
In addition, the coverage in order to expand micro-base station in heterogeneous network, so that micro-base station is more multiple terminals in the network
Service is provided, micro-base station frequency resource utilization rate is improved, to meet growing network demand.The embodiments of the invention provide
Another micro-base station of heterogeneous network, refering to Fig. 9, the structure chart of the base station embodiment of the embodiment of the present invention 2 shown, the base station can
Including：Loss measurement unit 901, loss acquiring unit 902, judging unit 903, determining unit 904, transmitting element 905, reception
Unit 906 and allocation unit 907, are further solved with reference to the operation principle of the base station to its inside each unit and internal connection
Release explanation.
Loss measurement unit 901, the uplink loss LLup1 for measuring the terminal；
Acquiring unit 902 is lost, the uplink loss LLup of the terminal for obtaining the macro base station measurement
2；
Judging unit 903, for judging whether the uplink loss LLup1 is less than uplink loss LL
Up2；
Determining unit 904, for when uplink loss LLup1 be less than uplink loss LLup2 when, it is determined that
The terminal meets resident condition.
Transmitting element 905, for when terminal meets resident condition, allowing resident instruction to terminal transmission, so that
The terminal resides in the micro-base station；
Receiving unit 906, for receiving the service request that the terminal is sent；
Allocation unit 907, for unappropriated wireless to the terminal distribution macro base station according to the service request type
Resource.
It is preferred that, the loss measurement unit, specifically for receiving the measurement report that the terminal is reported, is surveyed according to described
Information on path loss in amount report calculates uplink loss LLup1；Or,
The loss measurement unit, specifically for calculating the radio transmission distance between the terminal and this micro-base station, root
Uplink loss LLup1 is calculated according to the distance calculated.
The coverage of macro base station and micro-base station is divided by uplink loss, the covering model of Microcell can be extended
Enclose so that more terminal attachings add the capacity of the resident terminal of Microcell, pointed out handling up for system in micro-base station
Amount.
Further, the embodiments of the invention provide the hardware composition of micro-base station in above-mentioned heterogeneous network, the micro-base station can
Including at least one processor（Such as CPU）, at least one network interface or other communication interfaces, memory, and at least
One communication bus, for realizing the connection communication between these devices.What processor was stored for performing in memory holds
Row module, such as computer program.Memory may include high-speed random access memory（RAM：Random Acce
Ss Memory）, it is also possible to also including non-labile memory（Non-volatilememory）, for example, at least one
Individual magnetic disk storage.Pass through at least one network interface（Can be wired or wireless）Realize the system gateway and at least one
Communication connection between other network elements.
Referring to Figure 10, in some embodiments, programmed instruction is stored in memory, programmed instruction can be by processor
Perform, wherein, programmed instruction includes transmitting element 801, receiving unit 802 and allocation unit 803, and implementing for each unit can
Referring to the corresponding units disclosed in Fig. 8.Or programmed instruction may also include other units in above-described embodiment, reference can be made to Fig. 9, this
In repeat no more.
The present invention program can be described in the general context of computer executable instructions, such as
Program unit.Usually, program unit include performing particular task or realize the routine of particular abstract data type, it is program, right
As, component, data structure etc..The present invention program can also be put into practice in a distributed computing environment, in these Distributed Calculations
In environment, task is performed by the remote processing devices connected by communication network.In a distributed computing environment, program
Unit can be located at including in the local and remote computer-readable storage medium including storage device.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Divide mutually referring to what each embodiment was stressed is the difference with other embodiment.It is real especially for device
Apply for example, because it is substantially similar to embodiment of the method, so describing fairly simple, related part is referring to embodiment of the method
Part explanation.Device embodiment described above is only schematical, wherein described illustrate as separating component
Unit can be or may not be physically separate, the part shown as unit can be or may not be
Physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Can be according to the actual needs
Some or all of module therein is selected to realize the purpose of this embodiment scheme.Those of ordinary skill in the art are not paying
In the case of creative work, you can to understand and implement.
The control method and base station to a kind of heterogeneous network of the embodiment of the present invention are described in detail above, herein should
The present invention is set forth with embodiment, the explanation of above example is only intended to the side for helping to understand the present invention
Method and equipment；Simultaneously for those of ordinary skill in the art, according to the thought of the present invention, in embodiment and application
It will change in scope, in summary, this specification content should not be construed as limiting the invention.
Claims (16)
1. a kind of control method of heterogeneous network, it is characterised in that including：
When terminal meets resident condition, micro-base station is sent to the terminal allows resident instruction, so that the terminal is resided in
The micro-base station；
The micro-base station receives the service request that the terminal is sent, when the service request is that the terminal has business demand
The request of transmission；
The situation for the Radio Resource that the micro-base station currently takes according to macro base station, and according to the type of the service request to institute
State the unappropriated Radio Resource of terminal distribution macro base station.
2. according to the method described in claim 1, it is characterised in that the type according to the service request is to the terminal
The unappropriated Radio Resource of macro base station is distributed, including：
The micro-base station obtains the wireless resource information shared by the macro base station, determines the unappropriated wireless money of the macro base station
Source；
The micro-base station selects from identified Radio Resource to meet the Radio Resource of business demand according to service request type,
For the selected resource of the terminal distribution.
3. according to the method described in claim 1, it is characterised in that described according to the service request type, to the terminal
The unappropriated Radio Resource of macro base station is distributed, including：
The Radio Resource that the micro-base station sends shared by the access information and this micro-base station of the terminal to the macro base station is believed
Breath, so that wireless resource information of the macro base station according to shared by the access information and the micro-base station of the terminal is described
Micro-base station formulates radio resource allocation scheme；
The micro-base station receives the radio resource allocation scheme that the macro base station is sent, according to the radio resource allocation scheme to
The terminal distribution Radio Resource.
4. according to the method described in claim 1, it is characterised in that described according to the service request type, to the terminal
The unappropriated Radio Resource of macro base station is distributed, including：
The Radio Resource shared with macro base station is divided at least two resource collections, at least two resource by the micro-base station
Set is corresponded with the region that Microcell is divided；It is exclusively used at least two resource collection including at least one to micro-
The dedicated resource sets of user's distributing radio resource of cell edge region；
The micro-base station obtains the region belonging to the terminal, and according to service request type by the corresponding resource collection in the region
In radio resource allocation give the terminal, wherein, the micro-base station from the dedicated resource sets be Microcell marginal zone
The wireless resource block that wireless resource block that the user in domain is distributed and macro base station are distributed by the user of macrocell fringe region is not
Together.
5. method according to any one of claim 1 to 4, it is characterised in that methods described also includes：
The micro-base station sends the wireless resource information shared by this micro-base station to the macro base station, so that the macro base station is to connect
Enter the unappropriated Radio Resource of this micro-base station described in the terminal distribution of this macro base station.
6. method according to any one of claim 1 to 4, it is characterised in that when the macro base station is in the absence of vacant
Resource when, methods described also includes：
The micro-base station selects at least one stand-by terminal, and the distance between the stand-by terminal and the terminal are more than default threshold
Value；
The micro-base station is according to the service request type of the terminal, from the wireless money shared by least one described stand-by terminal
Shared resource is determined in source, and the shared resource is distributed into the terminal.
7. method according to any one of claim 1 to 4, it is characterised in that the micro-base station is true in the following manner
The fixed terminal meets resident condition, including：
The micro-base station measures the uplink loss LLup1 of the terminal；
The micro-base station obtains the uplink loss LLup2 of the terminal of the macro base station measurement；
The micro-base station judges whether the uplink loss LLup1 is less than uplink loss LLup2；
When the uplink loss LLup1 is less than uplink loss LLup2, the micro-base station determines that the terminal is met
Resident condition.
8. method according to claim 7, it is characterised in that the uplink loss of the micro-base station measuring terminals
LLup1, including：
The micro-base station receives the measurement report that the terminal is reported, and the information on path loss in the measurement report is calculated
Uplink loss LLup1；Or,
The micro-base station calculates the radio transmission distance between the terminal and this micro-base station, is calculated according to the distance calculated
LLup1 is lost in line link.
9. a kind of base station, it is characterised in that including：
Transmitting element, for when terminal meets resident condition, being sent to the terminal to allow resident instruction, so that the terminal
Reside in the micro-base station；
Receiving unit, for receiving the service request that the terminal is sent, the service request is that there is the terminal business to need
The request sent when asking；
Allocation unit, for the situation of the Radio Resource currently taken according to macro base station, and according to the type of the service request
To the unappropriated Radio Resource of terminal distribution macro base station.
10. base station according to claim 9, it is characterised in that the allocation unit includes：
First acquisition module, for obtaining the wireless resource information shared by the macro base station, determines that the macro base station is vacant
Radio Resource；
First distribute module, for being selected to meet the nothing of business demand from identified Radio Resource according to service request type
Line resource, is the selected resource of the terminal distribution.
11. base station according to claim 9, it is characterised in that the allocation unit includes：
First sending module, for sending wireless shared by the access information and this micro-base station of the terminal to the macro base station
Resource information, so that Radio Resource letter of the macro base station according to shared by the access information and described micro-base station of the terminal
Cease and formulate radio resource allocation scheme for described micro-base station；
First receiving module, for receiving the radio resource allocation scheme that the macro base station is sent；
Second distribute module, for according to the radio resource allocation scheme to the terminal distribution Radio Resource.
12. base station according to claim 9, it is characterised in that the allocation unit includes：
Division module, for the Radio Resource shared with macro base station to be divided into at least two resource collections, described at least two
Resource collection is corresponded with the region that Microcell is divided；It is exclusively used at least two resource collection including at least one
Dedicated resource sets to user's distributing radio resource of Microcell fringe region；
3rd distribute module, for obtaining the region belonging to the terminal, and it is according to service request type that the region is corresponding
Radio resource allocation in resource collection gives the terminal, is the user of Microcell fringe region from the dedicated resource sets
The wireless resource block distributed is different from the wireless resource block that macro base station is distributed by the user of macrocell fringe region.
13. the base station according to any one of claim 9 to 12, it is characterised in that the base station also includes：
Resource information transmitting element, for sending the wireless resource information shared by this micro-base station to the macro base station, so that institute
Macro base station is stated to access the unappropriated Radio Resource of this micro-base station described in the terminal distribution of this macro base station.
14. the base station according to any one of claim 9 to 12, it is characterised in that do not accounted for when the macro base station is not present
During resource, the base station also includes：
Selecting unit, for selecting at least one stand-by terminal, the distance between the stand-by terminal and the terminal are more than pre-
If threshold value；
Shared cell, for the type of the service request according to the terminal, from shared by least one described stand-by terminal
Shared resource is determined in Radio Resource, and the shared resource is distributed into the terminal.
15. the base station according to any one of claim 9 to 12, it is characterised in that the base station also includes：
Loss measurement unit, the uplink loss LLup1 for measuring the terminal；
Acquiring unit is lost, the uplink loss LLup2 of the terminal for obtaining the macro base station measurement；
Judging unit, for judging whether the uplink loss LLup1 is less than uplink loss LLup2；
Determining unit, for when uplink loss LLup1 is less than uplink loss LLup2, determining that the terminal is met
Resident condition.
16. base station according to claim 15, it is characterised in that
The loss measurement unit, specifically for receiving the measurement report that the terminal is reported, according in the measurement report
Information on path loss calculates uplink loss LLup1；Or,
The loss measurement unit, specifically for calculating the radio transmission distance between the terminal and this micro-base station, according to institute
The distance of calculating calculates uplink loss LLup1.
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