CN103763777A - Heterogeneous network control method and base station - Google Patents
Heterogeneous network control method and base station Download PDFInfo
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- CN103763777A CN103763777A CN201310716593.7A CN201310716593A CN103763777A CN 103763777 A CN103763777 A CN 103763777A CN 201310716593 A CN201310716593 A CN 201310716593A CN 103763777 A CN103763777 A CN 103763777A
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Abstract
The invention provides a heterogeneous network control method and a base station. The control method includes the steps that when terminals meet resident conditions, a micro base station sends resident permission instructions to the terminals so as to enable the terminals to reside in the micro base station; the micro base station receives service requests sent by the terminals and distributes wireless resources unoccupied by a macro base station to the terminals according to the types of the service requests. The main reason that users of the macro base station interfere the micro base station is that the users of the macro base station and users of the micro base station occupy the same wireless resources, and therefore the wireless resources distributed to the terminals by the micro base station are the wireless resources unoccupied by the macro base station, the problem of co-channel interference is avoided, and the resource utilization rate of the macro base station will not be influenced.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of control method and base station of heterogeneous network.
Background technology
Along with the fast development of mobile communication technology, people are more and more higher to the requirement of communication network, in order to meet user, network is experienced to higher demand, in cellular network, introduced heterogeneous network (Heterogeneous Network, HetNet) to reach the object that improves frequency spectrum resource utilization rate.HetNet refers in the overlay area of macro base station in traditional cellular network, then disposes several low power nodes (being micro-base station), forms the heterogeneous system of the different node types with identical covering.
Because the macro base station in HetNet network and micro-base station take same Radio Resource, macro base station edge customer can produce stronger uplink interference to the edge customer of micro-base station, and this serious interference affects the throughput of HetNet network.In order to reduce the edge customer of macro base station to the uplink interference of micro-base station, HetNet has introduced (the enhanced Inter-cell Interference Coordination of interference coordination between enhancement type district, eICIC) technology, by blank subframe (AlmostBlank Subframe is set in the Frame of macro base station, ABS) mode, so that micro-base station by its edge customer scheduling on ABS, can reduce so the descending interference of macro base station to micro-base station edge customer, to promote micro-station throughput.The method that this minimizing is disturbed is the mode by sacrificing macro base station Radio Resource, reaches and reduces the object that micro-station is disturbed, and therefore, although the method can reduce interference, the resource utilization of macro base station is but a greater impact.
Summary of the invention
In order to solve the problems of the technologies described above, the embodiment of the present invention provides a kind of control method and base station of heterogeneous network, to reduce the interference of macro base station to micro-base station, and guarantees that the resource utilization of macro base station is unaffected.
For this reason, the embodiment of the present invention provides following technical scheme:
First aspect, the embodiment of the present invention provides a kind of control method of heterogeneous network, and described method comprises:
When terminal meets resident condition, micro-base station sends and allows resident instruction to described terminal, so that described terminal resides in described micro-base station;
Described micro-base station receives the service request that described terminal sends, according to the type of described service request to the unappropriated Radio Resource of described terminal distribution macro base station.
In the possible implementation of the first of first aspect, described according to the type of described service request to the unappropriated Radio Resource of described terminal distribution macro base station, comprising:
Described micro-base station obtains the shared wireless resource information of described macro base station, determines the unappropriated Radio Resource of described macro base station;
The Radio Resource of business demand is selected to meet in described micro-base station from determined Radio Resource according to service request type, be the selected resource of described terminal distribution.
In the possible implementation of the second of first aspect, described according to described service request type, to the unappropriated Radio Resource of described terminal distribution macro base station, comprising:
Described micro-base station sends access information and this shared wireless resource information in micro-base station of described terminal to described macro base station, so that described macro base station is that allocation of radio resources scheme is formulated in described micro-base station according to the shared wireless resource information of the access information of described terminal and described micro-base station;
Described micro-base station receives the allocation of radio resources scheme that described macro base station sends, and the described allocation of radio resources scheme of foundation is to described terminal distribution Radio Resource.
In the third possible implementation of first aspect, described according to described service request type, to the unappropriated Radio Resource of described terminal distribution macro base station, comprising:
Described micro-base station will be divided at least two resource collections with the shared Radio Resource of macro base station, and the region that described at least two resource area are divided with Microcell is corresponding one by one; In described at least two resource collections, at least comprise a dedicated resource sets being exclusively used in to the user assignment Radio Resource of Microcell fringe region;
Described micro-base station obtains the region under described terminal, and by the allocation of radio resources in resource collection corresponding this region, give described terminal according to service request type, wherein, the wireless resource block that described micro-base station is distributed for the user of Microcell fringe region from described dedicated resource sets and macro base station for the wireless resource block that the user of macrocell fringe region distributes different.
In conjunction with the first or the second or the third possible implementation of first aspect or first aspect, in the 4th kind of possible implementation, described method also comprises:
Described micro-base station sends the shared wireless resource information in this micro-base station to described macro base station, so that described macro base station is unappropriated Radio Resource in this micro-base station described in the terminal distribution of this macro base station of access.
In conjunction with the first of first aspect or first aspect or the second or the third or the 4th kind of possible implementation, in the 5th kind of possible implementation, when described macro base station does not exist unappropriated resource, described method also comprises:
Described micro-base station selected at least one stand-by terminal, the distance between described stand-by terminal and described terminal is greater than predetermined threshold value;
Described micro-base station, according to the service request type of described terminal, is determined shared resource, and described shared resource is distributed to described terminal from the shared Radio Resource of described at least one stand-by terminal.
In conjunction with the first of first aspect or first aspect or the second or the third or the 4th kind or the 5th kind of possible implementation, in the 6th kind of possible implementation, described micro-base station determines that described terminal meets resident condition, comprising in the following manner:
The up link loss LLup1 of terminal described in described micro-base station measurement;
Described micro-base station obtains the up link loss LLup2 of the described terminal of described macro base station measurement;
Described micro-base station judges whether described up link loss LLup1 is less than up link loss LLup2;
When described up link loss LLup1 is less than up link loss LLup2, described micro-base station determines that described terminal meets resident condition.
In conjunction with the 6th kind of possible implementation of first aspect, in the 7th kind of possible implementation, the up link loss LLup1 of described micro-base station measurement terminal, comprising:
Described micro-base station receives the measurement report of described terminal to report, according to the information on path loss in described measurement report, calculates up link loss LLup1; Or,
The radio transmission distance between described terminal and this micro-base station is calculated in described micro-base station, according to calculated distance, calculates up link loss LLup1.
The second aspect embodiment of the present invention provides a kind of base station, and described base station comprises:
Transmitting element, for when terminal meets resident condition, sends and allows resident instruction to described terminal, so that described terminal resides in described micro-base station;
Receiving element, the service request sending for receiving described terminal;
Allocation units, for according to the type of described service request to the unappropriated Radio Resource of described terminal distribution macro base station.
In the possible implementation of the first of second aspect,, described allocation units comprise:
The first acquisition module, for obtaining the shared wireless resource information of described macro base station, determines the unappropriated Radio Resource of described macro base station;
The first distribution module, for select to meet the Radio Resource of business demand from determined Radio Resource according to service request type, is the selected resource of described terminal distribution.
In the possible implementation of the second of second aspect,, described allocation units comprise:
The first sending module, for send access information and this shared wireless resource information in micro-base station of described terminal to described macro base station, so that described macro base station is that allocation of radio resources scheme is formulated in described micro-base station according to the access information of described terminal and described the shared wireless resource information in micro-base station;
The first receiver module, the allocation of radio resources scheme sending for receiving described macro base station;
The second distribution module, for according to described allocation of radio resources scheme to described terminal distribution Radio Resource.
In the third possible implementation of second aspect, described allocation units comprise:
Divide module, for being divided at least two resource collections with the shared Radio Resource of macro base station, the region that described at least two resource area are divided with Microcell is corresponding one by one; In described at least two resource collections, at least comprise a dedicated resource sets being exclusively used in to the user assignment Radio Resource of Microcell fringe region;
The 3rd distribution module, for obtaining the region under described terminal, and according to service request type, by the allocation of radio resources in resource collection corresponding this region, give described terminal, the wireless resource block distributing for the user of Microcell fringe region from described dedicated resource sets and macro base station for the wireless resource block that the user of macrocell fringe region distributes different.
In conjunction with the first or the second or the third possible implementation of second aspect or second aspect, in the 4th kind of possible implementation, described base station also comprises:
Resource information transmitting element, for send the shared wireless resource information in this micro-base station to described macro base station, so that described macro base station is unappropriated Radio Resource in this micro-base station described in the terminal distribution of this macro base station of access.
In conjunction with the first of second aspect or second aspect or the second or the third or the 4th kind of possible implementation, in the 5th kind of possible implementation, when described macro base station does not exist unappropriated resource, described base station also comprises:
Selected cell, for selecting at least one stand-by terminal, the distance between described stand-by terminal and described terminal is greater than predetermined threshold value;
Shared cell for according to the type of the service request of described terminal, is determined shared resource, and described shared resource is distributed to described terminal from the shared Radio Resource of described at least one stand-by terminal.
In conjunction with the first of second aspect or second aspect or the second or the third or the 4th kind or the 5th kind of possible implementation, in the 6th kind of possible implementation, described base station also comprises:
Loss measurement unit, for measuring the up link loss LLup1 of described terminal;
Loss acquiring unit, for obtaining the up link loss LLup2 of the described terminal that described macro base station measures;
Judging unit, for judging whether described up link loss LLup1 is less than up link loss LLup2;
Determining unit, for when up link loss LLup1 is less than up link loss LLup2, determines that described terminal meets resident condition.
In conjunction with the 6th kind of possible implementation of second aspect, in the 7th kind of possible implementation, described loss measurement unit, specifically for receiving the measurement report of described terminal to report, calculates up link loss LLup1 according to the information on path loss in described measurement report; Or,
Described loss measurement unit, specifically for calculating the radio transmission distance between described terminal and this micro-base station, calculates up link loss LLup1 according to calculated distance.
The control method of a kind of heterogeneous network of the embodiment of the present invention and base station, can either reduce the interference of macro base station to micro-base station in order to reach, and improves the throughput of micro-base station, do not affect again the object of the resource utilization of macro base station.First be when described terminal meets resident condition, described micro-base station sends and allows resident instruction to described terminal, so that described terminal resides in described micro-base station, after described terminal resides in base station, when terminal has business demand, terminal can send service request to resident base station, therefore, described micro-base station receives the service request that described terminal sends, then, according to the type of service request to the unappropriated Radio Resource of described terminal distribution macro base station, due to, macro base station user is the same Radio Resource of CU of macro base station and micro-base station to the interference main cause of micro-base station, so, micro-base station is that the Radio Resource of described terminal distribution is the unappropriated Radio Resource of macro base station, can either avoid the problem of co-channel interference, can not have any impact to the resource utilization of macro base station again.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, the accompanying drawing the following describes is only some embodiment that record in the application, for those of ordinary skills, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the flow chart of the control method embodiment 1 of embodiment of the present invention heterogeneous network;
Fig. 2 is the flow chart of the resource allocation methods embodiment 1 that exemplifies of the invention process;
Fig. 3 is the flow chart of the resource allocation methods embodiment 2 that exemplifies of the invention process;
Fig. 4 is the flow chart of the resource allocation methods embodiment 3 that exemplifies of the invention process;
Fig. 5 is the schematic diagram that embodiment of the present invention HetNet local resource distributes;
Fig. 6 is the flow chart of the control method embodiment 2 of embodiment of the present invention heterogeneous network;
Fig. 7 is the flow chart of embodiment of the present invention terminal staying method;
Fig. 8 is the structure chart of embodiment of the present invention base station embodiment 1;
Fig. 9 is the structure chart of embodiment of the present invention base station embodiment 2;
Figure 10 is the hardware structure diagram of embodiment of the present invention base station.
Embodiment
In order to make those skilled in the art person understand better the present invention program, below in conjunction with drawings and embodiments, the embodiment of the present invention is described in further detail.
Consult Fig. 1, the flow chart of the control method embodiment 1 of the embodiment of the present invention heterogeneous network illustrating, the method can comprise:
Heterogeneous network (Heterogeneous Network, HetNet) terminal type that in, base station is served is varied, such as: mobile phone, notebook, vehicle-mounted computer etc., the service that these terminals will obtain heterogeneous network must first reside under the some base stations in heterogeneous network, allow this base station provide service for it, as an example of mobile phone terminal in heterogeneous network example, explain below.
In HetNet, after mobile phone power-on, first start to measure the signal that launch the base station (macro base station and micro-base station) in certain limit, and according to signal strength signal intensity (such as received signal code power (Received Signal Code Power, RSCP), or, received signal strength indicator (Received Signal Strength Indicator, RSSI), or, downlink reference signal received power (Reference Signal Received Power, RSRP)) size compares, or, also can compare according to the quality of received signal quality (Ec/No signal to noise ratio).Then, which base station strength is large or received signal quality good, and which base station mobile phone just belongs to, and namely resides in which base station.Such as: when the center of mobile phone in micro-base station coverage area, mobile phone for measuring to the downlink reference signal intensity of micro-base station while being greater than the downlink reference signal intensity of macro base station, mobile phone just selects to reside in micro-base station, then to micro-base station, send resident request, when micro-base station confirms that mobile phone meets resident condition, to mobile phone, send and allow resident instruction, then mobile phone just resides in micro-base station, by micro-base station, provides service for mobile phone.
After mobile phone resides in micro-base station, when having business demand, mobile phone to send service request to resident micro-base station, this service request at least comprises type of service, this type of service can comprise ip voice, web page browsing, transfer of data, file download,, video calling and streaming media service etc. any one, the resource size difference that different types of service is required, base station will be terminal distribution resource requirement according to type of service.
Micro-base station receives after the service request of mobile phone transmission, this service request is passed through to last layer radio network controller (Radio Network Controller, RNC), then, by the whether available free resource in RNC inquiry base station, if having, base station reports the available free resource of RNC, and the signaling that carries resource allocation information is sent to terminal, then terminal is according to the specified channel of distributed resource information access base station.It should be noted that, at long evolving system (Long Term Evolution, LTE) in, RNC function is concentrated in base station or core net, so the operation that above-mentioned RNC carries out is all operated by base station or core net.
In HetNet, macro base station and micro-base station are with frequently disposing, that is to say, macro base station and micro-base station have same frequency spectrum resource, embodiment of the present invention user's to micro-base station for fear of macro base station interference, refers to the co-channel interference between macro base station and the edge termination of micro-base station particularly.This be mainly because, the center terminal itself that macro base station and micro-base station covered is separately at a distance of distant, even if macro base station and micro-base station center terminal separately take same Resource Block, the co-channel interference producing also can be ignored, therefore the macro base station of, paying close attention in current HetNet network and the co-channel interference of micro-base station mainly refer to the co-channel interference between macro base station and the edge termination of micro-base station.
Adopt after the present invention program, no matter edge termination or center terminal, all can avoid the co-channel interference between macro base station and micro-base station.Certainly, the embodiment of the present invention also can be applied under the scene of the edge termination of only paying close attention to macro base station and micro-base station, at this, is not specifically limited.
When the terminal of serving when micro-base station needs Radio Resource, the situation of the current Radio Resource taking of macro base station will be considered in micro-base station, final, selects some allocation of radio resources that meet business demand to terminal from the unappropriated Radio Resource of macro base station.Like this, the terminal that terminal that micro-base station serves and macro base station are served takies different Radio Resources, just can avoid the problem of co-channel interference between macro base station and micro-base station, also can not have any impact to the resource utilization of macro base station.
The control method of the invention described above embodiment heterogeneous network, be exactly in fact, after terminal resides in micro-base station, when terminal has business demand, terminal can send service request to resident base station, described micro-base station receives the service request that described terminal sends, according to service request type to the unappropriated Radio Resource of described terminal distribution macro base station.Due to, the co-channel interference that the same Radio Resource of CU that macro base station user is macro base station and micro-base station to the interference main cause of micro-base station causes, so, micro-base station is that the Radio Resource of described terminal distribution is the unappropriated Radio Resource of macro base station, can either avoid the problem of co-channel interference, can not have any impact to the resource utilization of macro base station again.
Need explanation time, the control method of embodiment of the present invention heterogeneous network can be applied to any one and adopt OFDM (OrthogonalFrequency Division Multiplexing, OFDM) in the heterogeneous network system of technology, only as an example of LTE heterogeneous network system example, explain below.
For above-mentioned micro-base station according to described service request type the mode to the unappropriated Radio Resource of described terminal distribution macro base station, the embodiment of the present invention also provides following three kinds of implementations.
The first implementation, consults Fig. 2, the flow chart of the resource allocation methods embodiment 1 illustrating, and the method comprises:
In LTE heterogeneous network system, after micro-base station receives the service request of described terminal transmission, described micro-base station need to obtain the shared wireless resource information of described macro base station, that is to say, described micro-base station need to be known current which Radio Resource that takies of described macro base station, described micro-base station can intercom mutually by X2 interface and described macro base station, directly obtains the shared resource information of described macro base station.When LTE heterogeneous network is disposed, determined the spendable Radio Resource of this network, that is to say the spendable Radio Resource of macro base station and micro-base station in LTE heterogeneous network.When knowing the Radio Resource having taken, naturally just can know which Radio Resource is unoccupied.
The second implementation, consults Fig. 3, the flow chart of the resource allocation methods embodiment 2 illustrating, and the method comprises:
When micro-base station receives the service request of described terminal, by the access information of the shared resource information of current micro-base station and this terminal, described access information at least comprises: service request type, send in the lump macro base station, by macro base station, be that allocation of radio resources scheme is formulated in described micro-base station, described macro base station is when being described micro-base station formulation allocation of radio resources scheme, need to consider current which RB that taken in micro-base station, the type of service that the current described terminal that is linked into micro-base station is asked, the factors such as the resource information that this macro base station is shared, the allocation of radio resources scheme that final described macro base station is formulated for described micro-base station.Described Resource Allocation Formula specifically refers to described micro-base station is to which wireless resource block of described terminal distribution, and this wireless resource block is the Resource Block that described macro base station does not occupy.
Described micro-base station receives from X2 mouth the allocation of radio resources scheme that described macro base station is its formulation, it is which Resource Block of described terminal distribution that this scheme is indicated micro-base station, described micro-base station is just which Resource Block of described terminal distribution, to meet the business demand of terminal.
The third implementation, consults Fig. 4, the flow chart of the resource allocation methods embodiment 3 illustrating, and the method comprises:
While disposing with frequency in HetNet base station, just planned the sharable Radio Resource of macro base station and micro-base station, so, micro-base station can will be divided at least two resource collections with the shared Radio Resource of macro base station, the region that micro-base station covers is referred to as Microcell, very small cell is divided into at least two regions, at least two regions that described at least two resource collections are divided with Microcell are corresponding one by one simultaneously.In described at least two resource collections, at least comprise a dedicated resource sets being exclusively used in to the user assignment Radio Resource of Microcell fringe region, in order to reduce fringe region user's interference, the wireless resource block that the user that micro-base station is the fringe region of macro base station for the user institute distributing radio resource piece of Microcell fringe region from described dedicated resource sets does not occupy, that is to say, for reducing the interference to Microcell fringe region user, macro base station should not be the wireless resource block that the user of the user assignment Microcell fringe region of macrocell fringe region has taken as far as possible.Therefore, when the terminal that belongs to micro-base station has business demand, to micro-base station, send service request, micro-base station is just according to the business demand size of this terminal, be its distribute and the corresponding resource collection in this region in Radio Resource.Wherein, the wireless resource block that described micro-base station is distributed for the user of Microcell fringe region from described dedicated resource sets and macro base station for the wireless resource block that the user of macrocell fringe region distributes different.
Certainly, in order to reach better, reduce the object of disturbing, macro base station also can be divided at least two resource collections by self spendable Radio Resource, and at least two regions dividing with macrocell are corresponding one by one.In described at least two resource collections, at least comprise a dedicated resource sets being exclusively used in to the user assignment Radio Resource of macrocell fringe region, the wireless resource block in this set can comprise the wireless resource block that the dedicated resource sets of dividing for the user of Microcell fringe region micro-base station comprises.
As an example of concrete Radio Resource dividing mode example, above-mentioned resource allocation methods is explained in more detail to explanation below.Consult Fig. 5, the schematic diagram that the embodiment of the present invention HetNet local resource illustrating distributes.
For micro-base station, micro-base station becomes two resource collections by partition of available resources, RB1 and RB2, wherein, RB1, RB2 refer to the RB logical subsets in LTE subframe, and it might not be to concentrate to arrange in physical layer, is likely the arranged evenly of position changeable, and RB1, RB2 might not refer to a Resource Block, it may be also the set of Resource Block.Micro-base station, according to the distance size of the micro-base station of terminal distance, is divided into inner circle region and cylindrical region by very small cell, and cylindrical region is exactly fringe region, and inner circle region is exactly central area, and cylindrical region is corresponding with RB1, and inner circle region is corresponding with RB2.That is to say, the terminal covering for micro-base station fringe region, micro-base station is that it distributes the Resource Block in RB1, the terminal covering for central area, micro-base station is that it distributes the Resource Block in RB2.
For macrocell, macro base station also becomes partition of available resources two resource collections, RB3 and RB4, RB3, RB4 refer to the RB logical subsets in LTE subframe, it might not be to concentrate to arrange in physical layer, be likely the arranged evenly of position changeable, and RB3, RB4 might not refer to a Resource Block, may be also the set of Resource Block.Macro base station is also the distance size apart from macro base station according to terminal, and macrocell is divided into inner circle region and cylindrical region, and cylindrical region is corresponding with RB3, and inner circle region is corresponding with RB4.That is to say, the terminal covering for macro base station cylindrical region, macro base station is that it distributes the Resource Block in RB3, the terminal covering for inner circle region, macro base station is that it distributes the Resource Block in RB4.
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 the RB4 of macro base station are the different terminals for distributing to the cylindrical region, micro-base station that is spatially separated by, and macro base station can pass through the distribution to Resource Block in RB3, guarantee that the Resource Block having taken in the Resource Block of its distribution and micro-base station RB1 and RB2 is at time domain or frequency domain non-overlapping copies, therefore, if the micro-base station in heterogeneous network and macro base station are divided resource and overlay area in the manner described above, and according to overlay area and resource collection, to close be one to one terminal distribution resource, can either reduce the co-channel interference of macro base station to micro-base station edge customer, do not affect again the resource utilization of macro base station.
RB1 in Fig. 5 and the ratio of RB2, the ratio of RB3 and RB4 is all the distribution situation of the terminal that can serve along with micro-base station and macro base station and loading condition is adaptive adjusts.Therefore, this resource distribution mode can make HetNet have the adaptivity of the service dynamic of following variation and good application flexibility, fully promotes the availability of frequency spectrum of network.
In above-mentioned HetNet, all that the angle of distributing from the resource of micro-base station is considered, in order to realize more flexibly resource, distribute, can also be macro base station when being linked into the terminal distribution resource of this macro base station, the Radio Resource of considering micro-base station in network takies situation, based on above-mentioned technical problem, the embodiment of the present invention also provides a kind of preferred version, specifically on the basis of the invention described above embodiment 1 control method, described method also comprises: described micro-base station sends the shared wireless resource information in this micro-base station to described macro base station, so that described macro base station be access this macro base station terminal distribution described in the unappropriated Radio Resource in micro-base station.
Because the terminal quantity in HetNet is when more, there will be the situation that the load of macro base station and micro-base station all may be higher, so, when macro base station terminal has taken all Radio Resources, that is to say, while there is not unappropriated resource in described macro base station, in order to reduce the interference of macro base station to micro-base station, the embodiment of the present invention also provides preferred scheme, consults Fig. 6, the flow chart of the control method embodiment 2 of the embodiment of the present invention heterogeneous network illustrating, the method comprises:
Step 601～602 implementation procedure can, referring to the description of step 101～102, repeat no more herein.
In the present embodiment, when macro base station is given all allocation of radio resources the terminal of this macro base station of access, in network, there is not the unappropriated Radio Resource of macro base station, in this case, micro-base station resides in the mode of the described terminal of this micro-base station and the macro base station terminal common source of apart from each other by allowing, to reduce the co-channel interference between macro base station and micro-base station.Two terminals apart from each other each other, even if what these two terminals took is same Resource Block, interference also can be less.
In addition, because HetNet is according to footprint size difference, the overlay area of macro base station and micro-base station is called to macrocell and Microcell, wherein, the size of Microcell directly affects the height of HetNet frequency spectrum resource utilization rate, the larger frequency spectrum resource utilization rate of scope of Microcell is just higher, on the contrary, the less frequency spectrum resource utilization rate of scope of Microcell is just lower, this is because the scope of Microcell is less, its terminal of serving is just fewer, the utilance of frequency spectrum resource is just lower, therefore, in order to improve frequency spectrum resource rate rate, just necessarily require the overlay area of low power nodes large as far as possible, the terminal that namely requires low power nodes to serve is many as far as possible.
Prior art is the coverage that the mode by judging UE received signal power size is divided macro base station and micro-base station, because the transmitting power of macro base station is several times to tens times of micro-base station transmitting power, such as: generally the transmitting power of macro base station is generally 46dBm, the transmitting power of micro-base station is generally 30dBm, normally 40 times of micro-base station of the transmitting power of macro base station, therefore, adopt divide in this way the coverage of Microcell can be very little.Visible: the macrocell scope marking off in this manner will be far longer than Microcell scope, and the terminal that micro-base station is served is fewer, cause frequency resource utilance lower, cannot meet network demand.
Based on above-mentioned technical problem, the embodiment of the present invention also provides a kind of preferred version, can be specifically on the basis of the control method execution mode of above-mentioned any heterogeneous network, determine that in the following manner terminal meets resident condition, consult Fig. 7, the flow chart of the embodiment of the present invention terminal staying method illustrating, the method comprises:
Preferably, the up link loss LLup1 of described micro-base station measurement terminal, comprising:
Described micro-base station receives the measurement report of described terminal to report, according to the information on path loss in described measurement report, calculates up link loss LLup1; Or,
The radio transmission distance between described terminal and this micro-base station is calculated in described micro-base station, according to calculated distance, calculates up link loss LLup1.
Due to, the link load border such as up of macrocell and Microcell is greater than their descending constant power border, therefore, by up link loss, divide the coverage of macro base station and micro-base station, can expand the coverage of Microcell, make more terminal attaching in micro-base station, increased the resident termination capacity in Microcell, pointed out the throughput of system.
In addition, because the link load border such as up of macrocell and Microcell is greater than their descending constant power border, therefore, UE in these two borders can be subject to the strong interference from macro base station downstream signal, finally can cause Microcell fringe region throughput to reduce, in order to overcome above-mentioned deficiency, in micro-base station, be while residing in the up UE distributing radio resource waiting in link load border and descending constant power border of this micro-base station, can be by any mode in above-mentioned three kinds of implementations, for UE distributes required Radio Resource, to avoid the strong interference of macro base station to it.
Moreover, although consider that some terminal meets the condition that above-mentioned up link loss LLup1 is less than up link loss LLup2, but these terminals are not likely positioned at the actual coverage of micro-base station, even by these terminal attachings in micro-base station, also cannot obtain the service of micro-base station, therefore for fear of by these terminal attachings in micro-base station, the embodiment of the present invention provides a kind of preferred version, specifically, on the basis of the judgement terminal staying method described in above-mentioned Fig. 7, the method also comprises:
When described up link loss LLup1 is less than up link loss LLup2, described micro-base station judges whether up link loss LLup1 is less than the maximum uplink loss threshold value of this micro-base station; If be less than, described micro-base station determines that described terminal meets resident condition.Utilize the above-mentioned preferred version of the embodiment of the present invention, micro-base station can be by judging whether terminal meets resident condition more accurately.
Corresponding with the control method of the invention described above embodiment heterogeneous network, the embodiment of the present invention provides the micro-base station in heterogeneous network, consult Fig. 8, the structure chart of the embodiment of the present invention base station embodiment 1 illustrating, this base station can comprise: transmitting element 801, receiving element 802 and allocation units 803, below in conjunction with the operation principle of this base station, further explained in each unit, its inside and inner connection.
Transmitting element 801, for when terminal meets resident condition, sends and allows resident instruction to described terminal, so that described terminal resides in described micro-base station;
Receiving element 802, the service request sending for receiving described terminal;
Preferably, described allocation units can comprise:
The first acquisition module, for obtaining the shared wireless resource information of described macro base station;
The first distribution module, for according to business demand to the unappropriated Radio Resource of macro base station described in described terminal distribution.
Preferably, described allocation units can comprise:
The first sending module, for send access information and this shared wireless resource information in micro-base station of described terminal to described macro base station, so that described macro base station is that allocation of radio resources scheme is formulated in described micro-base station according to the access information of described terminal and described the shared wireless resource information in micro-base station;
The first receiver module, the allocation of radio resources scheme sending for receiving described macro base station;
The second distribution module, for according to described allocation of radio resources scheme to described terminal distribution Radio Resource.
Preferably, described allocation units can comprise:
Divide module, for being divided at least two resource collections with the shared Radio Resource of macro base station, the region that described at least two resource area are divided with Microcell is corresponding one by one; In described at least two resource collections, at least comprise a dedicated resource sets being exclusively used in to the user assignment Radio Resource of Microcell fringe region;
The 3rd distribution module, for obtaining the region under described terminal, and according to service request type, by the allocation of radio resources in resource collection corresponding this region, give described terminal, the wireless resource block distributing for the user of Microcell fringe region from described dedicated resource sets and macro base station for the wireless resource block that the user of macrocell fringe region distributes different.
Preferably, described base station also can comprise:
Resource information transmitting element, for send the shared wireless resource information in this micro-base station to described macro base station, so that described macro base station is unappropriated Radio Resource in this micro-base station described in the terminal distribution of this macro base station of access.
Preferably, when described macro base station does not exist unappropriated resource, described base station also can comprise:
Selected cell, for selecting at least one stand-by terminal, the distance between described stand-by terminal and described terminal is greater than predetermined threshold value;
Shared cell for according to the business demand of described terminal, is determined shared resource, and described shared resource is distributed to described terminal from the shared Radio Resource of described at least one stand-by terminal.
In addition, in order to expand the coverage of micro-base station in heterogeneous network so that micro-base station in this network more multiple terminals service is provided, improve micro-base station frequency resource utilization, to meet growing network demand.The embodiment of the present invention provides the another kind of heterogeneous network micro-base station, consult Fig. 9, the structure chart of the embodiment of the present invention base station embodiment 2 illustrating, this base station can comprise: loss measurement unit 901, loss acquiring unit 902, judging unit 903, determining unit 904, transmitting element 905, receiving element 906 and allocation units 907, below in conjunction with the operation principle of this base station, further explained in each unit, its inside and inner connection.
Judging unit 903, for judging whether described up link loss LLup1 is less than up link loss LLup2;
Determining unit 904, for when up link loss LLup1 is less than up link loss LLup2, determines that described terminal meets resident condition.
Transmitting element 905, for when terminal meets resident condition, sends and allows resident instruction to described terminal, so that described terminal resides in described micro-base station;
Receiving element 906, the service request sending for receiving described terminal;
Preferably, described loss measurement unit, specifically for receiving the measurement report of described terminal to report, calculates up link loss LLup1 according to the information on path loss in described measurement report; Or,
Described loss measurement unit, specifically for calculating the radio transmission distance between described terminal and this micro-base station, calculates up link loss LLup1 according to calculated distance.
By up link loss, divide the coverage of macro base station and micro-base station, can expand the coverage of Microcell, make more terminal attaching in micro-base station, increased the capacity of the resident terminal of Microcell, pointed out the throughput of system.
Further, the embodiment of the present invention provides the hardware of micro-base station in above-mentioned heterogeneous network to form, this micro-base station can comprise at least one processor (for example CPU), at least one network interface or other communication interfaces, memory, with at least one communication bus, for realizing the connection communication between these devices.The executable module that processor is stored for execute store, for example computer program.Memory may comprise high-speed random access memory (RAM:Random Access Memory), also may also comprise non-unsettled memory (non-volatilememory), for example at least one magnetic disc store.By at least one network interface (can be wired or wireless), realize the communication connection between this system gateway and at least one other network element.
Referring to Figure 10, in some embodiments, in memory, stored program command, program command can be executed by processor, wherein, program command comprises transmitting element 801, receiving element 802 and allocation units 803, the corresponding units that the specific implementation of each unit can disclose referring to Fig. 8.Or program command also can comprise other unit in above-described embodiment, can, referring to Fig. 9, repeat no more here.
The present invention program can describe in the general context of the computer executable instructions of being carried out by computer, for example program unit.Usually, program unit comprises and carries out particular task or realize routine, program, object, assembly, data structure of particular abstract data type etc.Also can in distributed computing environment (DCE), put into practice the present invention program, in these distributed computing environment (DCE), by the teleprocessing equipment being connected by communication network, be executed the task.In distributed computing environment (DCE), program unit can be arranged in the local and remote computer-readable storage medium including memory device.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, between each embodiment identical similar part mutually referring to, each embodiment stresses is and the difference of other embodiment.Especially, for device embodiment, because it is substantially similar in appearance to embodiment of the method, so describe fairly simplely, relevant part is referring to the part explanation of embodiment of the method.Device embodiment described above is only schematic, the wherein said unit as separating component explanation can or can not be also physically to separate, the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in multiple network element.Can select according to the actual needs some or all of module wherein to realize the object of the present embodiment scheme.Those of ordinary skills, in the situation that not paying creative work, are appreciated that and implement.
Control method to a kind of heterogeneous network of the embodiment of the present invention and base station are described in detail above, applied embodiment herein the present invention is set forth, and the explanation of above embodiment is just for helping to understand method and apparatus of the present invention; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (16)
1. a control method for heterogeneous network, is characterized in that, comprising:
When terminal meets resident condition, micro-base station sends and allows resident instruction to described terminal, so that described terminal resides in described micro-base station;
Described micro-base station receives the service request that described terminal sends, according to the type of described service request to the unappropriated Radio Resource of described terminal distribution macro base station.
2. method according to claim 1, is characterized in that, described according to the type of described service request to the unappropriated Radio Resource of described terminal distribution macro base station, comprising:
Described micro-base station obtains the shared wireless resource information of described macro base station, determines the unappropriated Radio Resource of described macro base station;
The Radio Resource of business demand is selected to meet in described micro-base station from determined Radio Resource according to service request type, be the selected resource of described terminal distribution.
3. method according to claim 1, is characterized in that, described according to described service request type, to the unappropriated Radio Resource of described terminal distribution macro base station, comprising:
Described micro-base station sends access information and this shared wireless resource information in micro-base station of described terminal to described macro base station, so that described macro base station is that allocation of radio resources scheme is formulated in described micro-base station according to the shared wireless resource information of the access information of described terminal and described micro-base station;
Described micro-base station receives the allocation of radio resources scheme that described macro base station sends, and the described allocation of radio resources scheme of foundation is to described terminal distribution Radio Resource.
4. method according to claim 1, is characterized in that, described according to described service request type, to the unappropriated Radio Resource of described terminal distribution macro base station, comprising:
Described micro-base station will be divided at least two resource collections with the shared Radio Resource of macro base station, and the region that described at least two resource area are divided with Microcell is corresponding one by one; In described at least two resource collections, at least comprise a dedicated resource sets being exclusively used in to the user assignment Radio Resource of Microcell fringe region;
Described micro-base station obtains the region under described terminal, and by the allocation of radio resources in resource collection corresponding this region, give described terminal according to service request type, wherein, the wireless resource block that described micro-base station is distributed for the user of Microcell fringe region from described dedicated resource sets and macro base station for the wireless resource block that the user of macrocell fringe region distributes different.
5. according to the method described in any one in claim 1 to 4, it is characterized in that, described method also comprises:
Described micro-base station sends the shared wireless resource information in this micro-base station to described macro base station, so that described macro base station is unappropriated Radio Resource in this micro-base station described in the terminal distribution of this macro base station of access.
6. according to the method described in any one in claim 1 to 5, it is characterized in that, when described macro base station does not exist unappropriated resource, described method also comprises:
Described micro-base station selected at least one stand-by terminal, the distance between described stand-by terminal and described terminal is greater than predetermined threshold value;
Described micro-base station, according to the service request type of described terminal, is determined shared resource, and described shared resource is distributed to described terminal from the shared Radio Resource of described at least one stand-by terminal.
7. according to the method described in any one in claim 1 to 6, it is characterized in that, described micro-base station determines that described terminal meets resident condition, comprising in the following manner:
The up link loss LLup1 of terminal described in described micro-base station measurement;
Described micro-base station obtains the up link loss LLup2 of the described terminal of described macro base station measurement;
Described micro-base station judges whether described up link loss LLup1 is less than up link loss LLup2;
When described up link loss LLup1 is less than up link loss LLup2, described micro-base station determines that described terminal meets resident condition.
8. method according to claim 7, is characterized in that, the up link loss LLup1 of described micro-base station measurement terminal, comprising:
Described micro-base station receives the measurement report of described terminal to report, according to the information on path loss in described measurement report, calculates up link loss LLup1; Or,
The radio transmission distance between described terminal and this micro-base station is calculated in described micro-base station, according to calculated distance, calculates up link loss LLup1.
9. a base station, is characterized in that, comprising:
Transmitting element, for when terminal meets resident condition, sends and allows resident instruction to described terminal, so that described terminal resides in described micro-base station;
Receiving element, the service request sending for receiving described terminal;
Allocation units, for according to the type of described service request to the unappropriated Radio Resource of described terminal distribution macro base station.
10. base station according to claim 9, is characterized in that, described allocation units comprise:
The first acquisition module, for obtaining the shared wireless resource information of described macro base station, determines the unappropriated Radio Resource of described macro base station;
The first distribution module, for select to meet the Radio Resource of business demand from determined Radio Resource according to service request type, is the selected resource of described terminal distribution.
11. base stations according to claim 9, is characterized in that, described allocation units comprise:
The first sending module, for send access information and this shared wireless resource information in micro-base station of described terminal to described macro base station, so that described macro base station is that allocation of radio resources scheme is formulated in described micro-base station according to the access information of described terminal and described the shared wireless resource information in micro-base station;
The first receiver module, the allocation of radio resources scheme sending for receiving described macro base station;
The second distribution module, for according to described allocation of radio resources scheme to described terminal distribution Radio Resource.
12. base stations according to claim 9, is characterized in that, described allocation units comprise:
Divide module, for being divided at least two resource collections with the shared Radio Resource of macro base station, the region that described at least two resource area are divided with Microcell is corresponding one by one; In described at least two resource collections, at least comprise a dedicated resource sets being exclusively used in to the user assignment Radio Resource of Microcell fringe region;
The 3rd distribution module, for obtaining the region under described terminal, and according to service request type, by the allocation of radio resources in resource collection corresponding this region, give described terminal, the wireless resource block distributing for the user of Microcell fringe region from described dedicated resource sets and macro base station for the wireless resource block that the user of macrocell fringe region distributes different.
13. according to the base station described in any one in claim 9 to 12, it is characterized in that, described base station also comprises:
Resource information transmitting element, for send the shared wireless resource information in this micro-base station to described macro base station, so that described macro base station is unappropriated Radio Resource in this micro-base station described in the terminal distribution of this macro base station of access.
14. according to the base station described in any one in claim 9 to 13, it is characterized in that, when described macro base station does not exist unappropriated resource, described base station also comprises:
Selected cell, for selecting at least one stand-by terminal, the distance between described stand-by terminal and described terminal is greater than predetermined threshold value;
Shared cell for according to the type of the service request of described terminal, is determined shared resource, and described shared resource is distributed to described terminal from the shared Radio Resource of described at least one stand-by terminal.
15. according to the base station described in any one in claim 9 to 14, it is characterized in that, described base station also comprises:
Loss measurement unit, for measuring the up link loss LLup1 of described terminal;
Loss acquiring unit, for obtaining the up link loss LLup2 of the described terminal that described macro base station measures;
Judging unit, for judging whether described up link loss LLup1 is less than up link loss LLup2;
Determining unit, for when up link loss LLup1 is less than up link loss LLup2, determines that described terminal meets resident condition.
16. base stations according to claim 15, is characterized in that,
Described loss measurement unit, specifically for receiving the measurement report of described terminal to report, calculates up link loss LLup1 according to the information on path loss in described measurement report; Or,
Described loss measurement unit, specifically for calculating the radio transmission distance between described terminal and this micro-base station, calculates up link loss LLup1 according to calculated distance.
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