CN107710816A

CN107710816A - A kind of load-balancing method and device

Info

Publication number: CN107710816A
Application number: CN201580081362.0A
Authority: CN
Inventors: 黄黎
Original assignee: Huawei Technologies Co Ltd
Current assignee: Zhuji Yashijie Knitting Co ltd
Priority date: 2015-07-31
Filing date: 2015-07-31
Publication date: 2018-02-16
Anticipated expiration: 2035-07-31
Also published as: CN107710816B; WO2017020192A1

Abstract

Embodiments of the present invention provide a load balancing method and device, wherein the method includes: when the user equipment UE is in the same-frequency dual connectivity area, sending a dual connectivity instruction to the UE, and the dual connectivity instruction is used to instruct the UE to simultaneously Connecting to a macro base station and a target small base station associated with the macro base station, the same-frequency dual connectivity area is an extended area obtained by extending the coverage area of the target small base station; according to the target small base station measured by the UE The signal strength of the small base station determines the location information of the UE, and assigns a serving base station to the UE according to the location information. The embodiment of the present invention can flexibly and quickly realize the load adjustment in the heterogeneous network, balance the load in the heterogeneous network, and improve the utilization rate of the small base station.

Description

A kind of load-balancing method and device

Technical field

The present invention relates to mobile communication technology field more particularly to a kind of load-balancing methods and device.

Background technique

With the fast development of mobile broadband service, the rapid growth of long term evolution (Long Term Evolution, LTE) mobile communication network flow is brought.In order to provide bigger wireless communications traffic, main solution first is that the network of deployment more crypto set, that is, increase the deployment quantity and density of wireless base station.Typical wireless cellular network is mainly made of the macro base station of same levels transmission power and coverage area, still, when the increase of macro base station deployment density to a certain extent after, installing new macro base station may be relatively difficult.At this time, some small base stations (Low Power Nodes, LPN) being more easily installed can be disposed in the coverage area of macro base station, this macro base station and the network of small base station mixing are known as heterogeneous network (HetNet, Heterogeneous Network).

HetNet network increases network capacity and coverage area, but since macro base station transmission power is big, installation site is high, and small base station transmitting power is small, installation site is short, so that the number of user equipment in small base station range is fewer than macro base station very much, it is more that small base station is in idle and low-load state time, unbalanced so as to cause macro base station and small load of base station, the utilization rate of small base station is lower.

In order to solve the problems, such as that macro base station and small load of base station are unbalanced in LTE HetNet network, third generation partner program (The 3rd Generation Partnership Project, 3GPP) tissue introduces cell range extension (Cell Range Expansion, CRE) technology.CRE technology is used for region that the overlay area progress extension appropriate of small base station is expanded, then user is switched to small base station from macro base station by switching flow by the user equipment for being connected to macro base station in extended area originally, so that the number of users serviced on macro base station and small base station is more balanced, the utilization rate of small base station is improved.But CRE technology has the disadvantage in that first, switching flow there are the user equipment handling capacities in the extended area in overhead and handoff procedure can be impacted；Second, for the user equipment of the switching base station in the extended area, further away from small base station, close to the user equipment of macro base station, interference signal is stronger, useful signal is weaker, after user equipment is more than certain distance apart from small base station, it will appear the stronger abnormal conditions of jam-to-signal useful signal, radio transmission performance so as to cause the user equipment in the extended area is excessively poor, it cannot even work, at this moment the limit of extended area has just been reached, when CRE technology reaches the extended area limit, extended area is still inadequate Greatly, the user equipment that can include is still less, though macro base station and small load of base station is unbalanced makes moderate progress, unbalanced still more serious；Third just interrupts the connection between macro base station after the user equipment in the extended area is switched to small base station, causes load dynamic adjustment cost between macro base station and small base station high, not flexible.

Summary of the invention

The embodiment of the invention provides a kind of load-balancing method and device, it can flexibly, rapidly realize that the adjusting to loading in heterogeneous network, the load in balanced heterogeneous network improve the utilization rate of small base station.

First aspect of the embodiment of the present invention provides a kind of load-balancing method, comprising:

When user equipment (UE) is in frequency dual link region, dual link instruction is sent to the UE, the dual link instruction is used to indicate the UE while being connected to macro base station and the small base station of target associated with the macro base station, and the same frequency dual link region is the extended area being extended to the overlay area of the small base station of the target；

The location information of the UE is determined according to the signal strength of the small base station of the target of UE measurement, and distributes serving BS according to the positional information for the UE.

In the first possible implementation of first aspect of the embodiment of the present invention, described when user equipment (UE) is in frequency dual link region, Xiang Suoshu UE is sent before the step of dual link instructs, further includes:

The overlay area of the small base station of target associated with macro base station is extended, so that the overlay area of the small base station of the target after extension includes original overlay area and with frequency dual link region, the signal strength of the small base station of the target on the original coverage area boundaries line is equal with the signal strength of the macro base station, and the signal strength of the small base station of the target in the same frequency dual link region is greater than preset threshold；

When knowing that user equipment (UE) is connected to the macro base station, the signal strength of the small base station of the target of the UE measurement is obtained；

Judge whether the UE is in same frequency dual link region according to the signal strength of the small base station of the target of UE measurement；

Wherein, the same frequency dual link region includes the first extended area and the second extended area, first extended area is close to the region of the original overlay area of the small base station of the target, second extended area is the region of the original overlay area far from the small base station of the target, and the offset parameter of the signal strength of the small base station of the target in first extended area is greater than the small base station of the target in second extended area The offset parameter of signal strength.

In the first possible implementation in conjunction with first aspect of the embodiment of the present invention, in second of the embodiment of the present invention possible implementation, the overlay area to the small base station of target associated with macro base station is extended, comprising:

Count the signal strength of the small base station of target associated with the macro base station of all user equipment measurements in the overlay area of macro base station；

The overlay area of the small base station of the target is extended according to the signal strength of the small base station of the target of all user equipment measurements.

In the first possible implementation in conjunction with first aspect of the embodiment of the present invention, in the embodiment of the present invention in the third possible implementation, before the step of overlay area to the small base station of target associated with macro base station is extended, further includes:

The overlay area of macro base station is obtained, and detects and whether there is small base station in the overlay area of the macro base station；

When the result of detection, which is, is, the small base station is determined as the small base station of target associated with the macro base station.

In conjunction with first aspect of the embodiment of the present invention the first to the third possible implementation, in the 4th kind of possible implementation of first aspect of the embodiment of the present invention, the signal strength of the small base station of the target according to UE measurement judges whether the UE is in same frequency dual link region, comprising:

Judge whether the signal strength of the small base station of the target of the UE measurement is greater than the preset threshold；

When the result judged is is, judge whether the signal strength of the small base station of the target of the UE measurement is less than the signal strength on the original coverage area boundaries line of the small base station of the target；

When the result judged is is, determine that the UE is in the same frequency dual link region.

In conjunction with first aspect of the embodiment of the present invention the first to the 4th kind of possible implementation, it is described to send dual link instruction to the UE in the 5th kind of possible implementation of first aspect of the embodiment of the present invention, comprising:

It is the user device configuration in the same frequency dual link region with frequency carrier wave set according to the carrier wave that the macro base station is sent, the same frequency carrier wave set includes same frequency main plot and with frequency secondary cell, the same frequency main plot is the macro base station, and the same frequency secondary cell is the small base station of the target；

Dual link instruction is sent to the same frequency carrier wave set of the UE, the dual link instruction is used to indicate the UE while being connected to the macro base station and the small base station of the target, and the company that will be connected to the macro base station It connects as main connection, be connected to the small base station of the target is connected to auxiliary connection.

In conjunction with first aspect of the embodiment of the present invention the first to the 5th kind of possible implementation, in the 6th kind of possible implementation of first aspect of the embodiment of the present invention, the signal strength of the small base station of the target according to UE measurement determines the location information of the UE, and serving BS is distributed for the UE according to the positional information, comprising:

Obtain the offset parameter of the signal strength of the small base station of the target of the UE measurement；

It when the offset parameter got is identical as the offset parameter of signal strength of the small base station of the target in first extended area, determines that the UE is located in first extended area, and distributes the small base station of target as serving BS for the UE；

When the offset parameter got is identical as the offset parameter of signal strength of the small base station of the target in second extended area, it determines that the UE is located in second extended area, and distributes the macro base station and the small base station of the target as serving BS for the UE.

It is described to distribute the small base station of target as serving BS for the UE in the 7th kind of possible implementation of first aspect of the embodiment of the present invention in conjunction with the 6th kind of possible implementation of first aspect of the embodiment of the present invention, comprising:

It controls the small base station of the target and provides control channel for the UE；

Control uplink service and downlink business that the UE is dispatched in the small base station of the target.

It is described to distribute the macro base station and the small base station of the target as serving BS for the UE in the 8th kind of possible implementation of first aspect of the embodiment of the present invention in conjunction with the 6th kind of possible implementation of first aspect of the embodiment of the present invention, comprising:

It controls the macro base station and provides control channel for the UE；

The downlink business that the macro base station dispatches the UE is controlled, the uplink service that the UE is dispatched in the small base station of the target is controlled.

In conjunction with first aspect of the embodiment of the present invention the first to the 8th kind of possible implementation, in the 9th kind of possible implementation of first aspect of the embodiment of the present invention, after described the step of distributing serving BS according to the positional information for the UE, further includes:

Monitor the load capacity of the macro base station and the small base station of the target；

It is again that the UE distributes serving BS when the load capacity of the macro base station is higher than the load capacity of the first preset threshold or the small base station of the target higher than the second preset threshold.

Second aspect of the embodiment of the present invention provides another load-balancing method, comprising:

When receiving the dual link instruction of load balancing apparatus transmission, establish and the connection between macro base station and the small base station of target associated with the macro base station；

Measure the signal strength of the small base station of the target, and the signal strength of the small base station of the target of measurement is fed back into the load balancing apparatus, so that the load balancing apparatus determines the location information of this equipment and distributes serving BS according to the positional information for this equipment；

Obtain the location information that the load balancing apparatus determines, and the serving BS distributed using the load balancing apparatus.

In the first possible implementation of second aspect of the embodiment of the present invention, the location information includes the first extended area or the second extended area；

It is described to include: using the serving BS that the load balancing apparatus distributes

When the UE is located at first extended area, the control channel provided using the small base station of the target receives the uplink service and downlink business of the small base station scheduling of the target；

When the UE is located at second extended area, the control channel provided using the macro base station receives the downlink business of the macro base station scheduling, the uplink service of the small base station scheduling of target.

The third aspect of the embodiment of the present invention provides a kind of load balancing apparatus, comprising:

Instruction sending unit, for when user equipment (UE) is in frequency dual link region, dual link instruction is sent to the UE, the dual link instruction is used to indicate the UE while being connected to macro base station and the small base station of target associated with the macro base station, and the same frequency dual link region is the extended area being extended to the overlay area of the small base station of the target；

The signal strength of base station allocation unit, the small base station of the target for being measured according to the UE determines the location information of the UE, and distributes serving BS according to the positional information for the UE.

In the first possible implementation of the third aspect of the embodiment of the present invention, further includes:

Region expanding element, it is extended for the overlay area to the small base station of target associated with macro base station, so that the overlay area of the small base station of the target after extension includes original overlay area and with frequency dual link region, the signal strength of the small base station of the target on the original coverage area boundaries line is equal with the signal strength of the macro base station, and the signal strength of the small base station of the target in the same frequency dual link region is greater than preset threshold；

Intensity acquiring unit, for when knowing that user equipment (UE) is connected to the macro base station, described in acquisition The signal strength of the small base station of the target of UE measurement；

The signal strength of region decision unit, the small base station of the target for being measured according to the UE judges whether the UE is in same frequency dual link region；

Wherein, the same frequency dual link region includes the first extended area and the second extended area, first extended area is close to the region of the original overlay area of the small base station of the target, second extended area is the region of the original overlay area far from the small base station of the target, and the offset parameter of the signal strength of the small base station of the target in first extended area is greater than the offset parameter of the signal strength of the small base station of the target in second extended area.

In conjunction with the first possible implementation of the third aspect of the embodiment of the present invention, in second of possible implementation of the third aspect of the embodiment of the present invention, the region expanding element is specifically used for the signal strength for the small base station of the target that all user equipmenies measure in the overlay area of statistics macro base station, and is extended according to the signal strength of the small base station of the target of all user equipment measurements to the overlay area of the small base station of the target.

In conjunction with the first and second of possible implementation of the third aspect of the embodiment of the present invention, in the third possible implementation of the third aspect of the embodiment of the present invention, the region decision unit includes:

First judging unit, for judging whether the signal strength of the small base station of the target of the UE measurement is greater than the preset threshold；

Second judgment unit when result for judging when first judging unit is is, judges whether the signal strength of the small base station of the target of the UE measurement is less than the signal strength on the original coverage area boundaries line of the small base station of the target；

Relation determination unit determines that the UE is in the same frequency dual link region when result for judging when the second judgment unit is is.

In conjunction with the third aspect of the embodiment of the present invention the first to the third possible implementation, the instruction sending unit described in the 4th kind of possible implementation of the third aspect of the embodiment of the present invention includes:

With frequency configuration unit, carrier wave for being sent according to the macro base station is the user device configuration in the same frequency dual link region with frequency carrier wave set, the same frequency carrier wave set includes same frequency main plot and with frequency secondary cell, the same frequency main plot is the macro base station, and the same frequency secondary cell is the small base station of the target；

Indicating unit is connected, for sending dual link instruction to the same frequency carrier wave set of the UE, the dual link instruction is used to indicate the UE while being connected to the macro base station and the small base station of the target, and will even Be connected to the macro base station is connected to main connection, and be connected to the small base station of the target is connected to auxiliary connection.

In conjunction with the third aspect of the embodiment of the present invention the first to the 4th kind of possible implementation, in the 5th kind of possible implementation of the third aspect of the embodiment of the present invention, the base station allocation unit includes:

Parameter acquiring unit, the offset parameter of the signal strength of the small base station of the target for obtaining the UE measurement；

First allocation unit, for when the offset parameter got is identical as the offset parameter of signal strength of the small base station of the target in first extended area, it determines that the UE is located in first extended area, and distributes the small base station of target as serving BS for the UE；

Second allocation unit, for when the offset parameter got is identical as the offset parameter of signal strength of the small base station of the target in second extended area, it determines that the UE is located in second extended area, and distributes the macro base station and the small base station of the target as serving BS for the UE.

In conjunction with the 5th kind of possible implementation of the third aspect of the embodiment of the present invention, in the 6th kind of possible implementation of the third aspect of the embodiment of the present invention, first allocation unit includes:

First control unit provides control channel for controlling the small base station of the target for the UE；

Second control unit dispatches the uplink service and downlink business of the UE for controlling the small base station of the target.

In conjunction with the 6th kind of possible implementation of the third aspect of the embodiment of the present invention, in the 7th kind of possible implementation of the third aspect of the embodiment of the present invention, second allocation unit includes:

Third control unit provides control channel for controlling the macro base station for the UE；

4th control unit dispatches the downlink business of the UE for controlling the macro base station, controls the uplink service that the UE is dispatched in the small base station of the target.

In conjunction with the third aspect of the embodiment of the present invention the first to the 7th kind of possible implementation, in the 8th kind of possible implementation of the third aspect of the embodiment of the present invention, further includes:

Load capacity monitoring unit, for monitoring the load capacity of the macro base station and the small base station of the target；

Unit being redistributed, being again that the UE distributes serving BS when for being higher than the load capacity of the first preset threshold or the small base station of the target when the load capacity of the macro base station higher than the second preset threshold.

Fourth aspect of the embodiment of the present invention provides a kind of user equipment, comprising:

Connection unit, for establishing and the connection between macro base station and the small base station of target associated with the macro base station when receiving the dual link instruction of load balancing apparatus transmission；

Measuring unit, for measuring the signal strength of the small base station of the target, and the signal strength of the small base station of the target of measurement is fed back into the load balancing apparatus, so that the load balancing apparatus determines the location information of this equipment and distributes serving BS according to the positional information for this equipment；

Using unit, the location information determined for obtaining the load balancing apparatus, and the serving BS distributed using the load balancing apparatus.

In the first possible implementation of first aspect of the embodiment of the present invention, the location information includes the first extended area or the second extended area；The control channel that is described to be specifically used for using unit when the UE is located at first extended area, being provided using the small base station of the target receives the uplink service and downlink business of the small base station scheduling of the target；When the UE is located at second extended area, the control channel provided using the macro base station receives the downlink business of the macro base station scheduling, the uplink service of the small base station scheduling of target.

In embodiments of the present invention, by when user equipment (UE) is in frequency dual link region, dual link instruction is sent to the UE, the dual link instruction is used to indicate the UE while being connected to macro base station and the small base station of target associated with the macro base station, the same frequency dual link region is the extended area being extended to the overlay area of the small base station of the target, then the location information of the UE is determined according to the signal strength of the small base station of the target of UE measurement, and serving BS is distributed for the UE according to the positional information, to flexibly, rapidly realize the adjusting to loading in heterogeneous network, load in balanced heterogeneous network, further expand the overlay area of small base station, improve the utilization rate of small base station.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, the drawings to be used in the embodiments are briefly described below, apparently, drawings in the following description are only some embodiments of the invention, for those of ordinary skill in the art, without creative efforts, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is a kind of network topology figure of load-balancing method provided in an embodiment of the present invention；

Fig. 2 is a kind of flow diagram of load-balancing method provided in an embodiment of the present invention；

Fig. 3 is the flow diagram of another load-balancing method provided in an embodiment of the present invention；

Fig. 4 is the flow diagram that the step S204 in embodiment illustrated in fig. 3 is realized；

Fig. 5 is the flow diagram of another load-balancing method provided in an embodiment of the present invention；

Fig. 6 is a kind of structural schematic diagram of load balancing apparatus provided in an embodiment of the present invention；

Fig. 7 is the structural schematic diagram for the instruction sending unit that embodiment illustrated in fig. 6 provides；

Fig. 8 is the structural schematic diagram for the base station allocation unit that embodiment illustrated in fig. 6 provides；

Fig. 9 is the structural schematic diagram of another load balancing apparatus provided in an embodiment of the present invention；

Figure 10 is a kind of structural schematic diagram of user equipment provided in an embodiment of the present invention；

Figure 11 is the structural schematic diagram of another load balancing apparatus provided in an embodiment of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, shall fall within the protection scope of the present invention.

The embodiment of the present invention provides a kind of load-balancing method and device, it can be applied in heterogeneous network in the scene of load regulation, such as, when load balancing apparatus judgement show that user equipment (UE) is in frequency dual link region, dual link instruction is sent to the UE, the dual link instruction is used to indicate the UE while being connected to macro base station and the small base station of target associated with the macro base station, the same frequency dual link region is the extended area being extended to the overlay area of the small base station of the target, then the signal strength for the small base station of the target that the load balancing apparatus is measured according to the UE determines the location information of the UE, and serving BS is distributed for the UE according to the positional information.The embodiment of the present invention can make full use of the macro base station in heterogeneous network and the resource of small base station, flexibly, rapidly realize the adjusting to loading in heterogeneous network, so that the load in heterogeneous network reaches equilibrium state, improve the utilization rate of small base station.

Load balancing apparatus in the embodiment of the present invention can be deployed in some position between macro base station and small base station, facilitate load balancing apparatus that the load in heterogeneous network is adjusted.The load balancing apparatus can also be deployed in the macro base station of heterogeneous network, be the distribution serving BS of the user equipment service in the overlay area by macro base station, so that the load in heterogeneous network reaches equilibrium state.The load balancing apparatus can also be deployed in the small base station of heterogeneous network, serving BS be distributed by the user equipment that small base station is assigned as in association macro base station coverage area, so that the load in heterogeneous network reaches equilibrium state.The load in heterogeneous network is adjusted for the ease of load balancing apparatus, preferably the load balancing apparatus is deployed in the macro base station of heterogeneous network.

User equipment in the embodiment of the present invention can include but is not limited to mobile phone, PAD (tablet computer), Intelligent wearable device etc. has the mobile terminal of mobile communication function.It should be noted that the user equipment in the embodiment of the present invention needs to configure same frequency carrier wave, doubly-linked connection function is realized, so that in that can be connected to simultaneously on macro base station and small base station associated with the macro base station with the user equipment in frequency dual link region.

It describes in detail below in conjunction with attached drawing 1- attached drawing 4 to load-balancing method provided in an embodiment of the present invention.

It referring to Figure 1, is a kind of network topology figure of load-balancing method provided in an embodiment of the present invention, which includes macro base station, small base station, region A, region B, region C and region D.It should be noted that, network topology figure shown in FIG. 1 is a part in heterogeneous network, it include at least one macro base station and at least one small base station in shown heterogeneous network, wherein include at least one small base station in the overlay area of each macro base station at least one macro base station.The overlay area of small base station is much smaller than the overlay area of macro base station, and small base station is located in the overlay area of association macro base station, but the user equipment in small base station coverage area is usually controlled by small base station, is not controlled by macro base station.Wherein, small base station can include but is not limited to the lesser base station of area coverages such as micro-base station, femto base station, Home eNodeB, enterprise base station.

B area in Fig. 1 is the original overlay area of small base station, the region C and the region D are the region of the small base station extension, and the region C, close to the small base station, the region D is except the region C, the region that a-quadrant is covered for macro base station after the small base station extension, and a-quadrant is farther out from the small base station.Macro base station and small base station in heterogeneous network are all sent out signal or data in the form of a carrier, therefore can the Utopian overlay area by macro base station and small base station regard round or ellipse as, but in practical application, since the presence of high building may will affect the signal strength of macro base station and small base station.It should be noted that the signal strength of the small base station and the signal strength of the macro base station are equal on B area boundary.User equipment in region C and region D is able to detect that the signal strength of the small base station, but weaker than the signal strength of the small base station of the user equipment detection in B area, and the user equipment in a-quadrant may can't detect the signal strength of the small base station.

When not using the CRE technology of the embodiment of the present invention and background technique, B area belongs to the overlay area of the macro base station with exterior domain.In CRE technology, the extended area of the small base station corresponds to the region C in figure, due to the expansion with the small base station range, it is increasingly remoter, more and more closer from the macro base station from the small base station, user equipment radio transmission performance in the region C just becomes excessively poor, so that the extended area of the small base station is limited, can not continue to extend, cause the coverage area of small base station still too small, can include User equipment is still less, though macro base station and small load of base station is unbalanced makes moderate progress, load imbalance is still more serious.Phase and CRE technology, the embodiment of the present invention is by the extended area further expansion of the small base station, so that the extended area of the small base station includes the region C and the region D, and the user equipment in the two regions can be connected to the macro base station and the small base station simultaneously, and radio transmission performance will not be impacted.It should be noted that, the specific range in the region C and the region D is determined by the small base station signal strength offset parameter that the operator for managing the macro base station and the small base station issues, optionally, the offset parameter is the Reference Signal Received Power (Reference Signal Received Power, RSRP) of small base station.Such as, the offset parameter for configuring the region C is -10dB, and the offset parameter in the region D is -20dB, indicates that the RSRP of small base station continues to extend to the outside -10dB and -20dB since the boundary line of B area, RSRP i.e. in the region C reduces 10dB than B area, and the RSRP in the region D reduces 20dB than B area.It should be noted that the signal strength of small base station is different with the signal strength offset parameter of small base station, the signal strength for the small base station that the user equipment in the region C detects may be different, but the signal strength offset parameter of the small base station in the region is identical.

Fig. 2 is referred to, is a kind of flow diagram of load-balancing method provided in an embodiment of the present invention, this method may include step S101 and step S102.

S101, when user equipment (UE) is in frequency dual link region, Xiang Suoshu UE sends dual link instruction.

Optionally, when user equipment (UE) is in frequency dual link region, load balancing apparatus sends dual link instruction to the UE, the dual link instruction is used to indicate the UE while being connected to macro base station and the small base station of target associated with the macro base station, and the same frequency dual link region is the extended area being extended to the overlay area of the small base station of the target.The carrier wave that the load balancing apparatus is sent according to the macro base station is the user device configuration in the same frequency dual link region with frequency carrier wave set, when the UE is located at the same frequency dual link region, the load balancing apparatus sends dual link instruction to the same frequency carrier wave set of the UE, indicates the UE while being connected to the macro base station and the small base station of the target.The dual link that user equipment in the same frequency dual link region is sent according to the load balancing apparatus is instructed while being connected on the macro base station and the small base station of the target, it can be understood that carrier wave that the user equipment for being configured with the same frequency carrier wave set is sent using the macro base station while being connected to the macro base station and the small base station of the target, therefore it is possible to prevente effectively from the case where interference signal of macro base station described in the prior art influences the useful signal of the small base station of the target.

Optionally, see the same frequency dual link region as a co-frequency cell, user equipment in the co-frequency cell can be connected to the macro base station and the small base station of the target simultaneously, and using the macro base station as the main plot in the co-frequency cell, secondary cell of the small base station of target as the co-frequency cell, it connects based on the connection i.e. for being so connected to the macro base station, is connected supplemented by the connection i.e. for being connected to the small base station of the target.

Wherein, the dual link instruction uses third generation partner program (The 3rd Generation Partnership Project, 3GPP) tissue carrier wave polymerize existing instruction, i.e., carrier wave is polymerize existing instruction and be also employed in the load balancing apparatus.

Wherein, the small base station of the target is a small base station in the macro base station coverage area.In heterogeneous network, including at least one macro base station and at least one small base station, using small base station included in the overlay area of the macro base station as small base station associated with the macro base station, due to may include the small base station of more than one in the overlay area of the macro base station, in order to facilitate understanding, the embodiment of the present invention selects one to be introduced as the small base station of target from the small base station in the overlay area of the macro base station, and there are the case where multiple associations small base station to be analogized according to embodiments of the present invention.

Before the load balancing apparatus sends the dual link instruction, it is thus necessary to determine that whether the UE is in the same frequency dual link region.The UE can measure the signal strength of the small base station of the target at any time in moving process or stationary state, can also measure the signal strength of the macro base station.Since the small base station of the target is also included in the coverage area of the macro base station, and the coverage area of the macro base station is larger, determine that the accuracy of the position UE is lower according to the signal strength of the macro base station, therefore the signal strength of the small base station of the target that the load balancing apparatus in the embodiment of the present invention is measured according to the UE determines which region that the UE belongs in Fig. 1.Specifically, it may be zero that the signal strength of the small base station of the target of the UE measurement is weaker when the UE belongs to a-quadrant；When the UE belongs to the region C or the region D, the signal intensity ratio a-quadrant of the small base station of the target of the UE measurement is strong, greater than preset threshold, the preset threshold is the signal strength for the small base station of the target that the user equipment in D regional edge boundary line measures, specific value is set by the network management personnel of the load balancing apparatus, and the signal strength of the small base station of the target is less than the signal strength of the macro base station；When the UE belongs to B area, the signal strength of the small base station of the target of the UE measurement is greater than or equal to the signal strength of the macro base station.

Wherein, the same frequency dual link region corresponds to the region C and the region D in Fig. 1, is the extended area of the small base station of the target.The UE can both measure the mesh in the same frequency dual link region Mark the signal strength of small base station, the signal strength of the macro base station can be measured again, the signal strength of the macro base station usually in the same frequency dual link region is higher than the signal strength of the small base station of the target, but since the user equipment in the macro base station coverage area is more, if the user equipment in the same frequency dual link region is all connected to the macro base station and uses the resource on the macro base station, the bandwidth that may cause each user equipment point in the same frequency dual link region is smaller, it is unfavorable for the transmission of data, and the small base station of target is likely to be at idle state, the load excess of the macro base station is not only resulted in, have an effect on the experience of same frequency dual link area intra domain user.Therefore, the user equipment in the same frequency dual link region in the embodiment of the present invention both may be coupled on the macro base station, it is may be coupled on the small base station of the target again, the load balancing apparatus is that user equipment distributes the macro base station and/or the small base station of the target as serving BS according to the specific location of user equipment, both the load of the macro base station will not be caused to bear, user experience will not be influenced.

Usually, the region that one macro base station is covered is considered as a cell, the user equipment into the cell provides the business such as voice, data to the macro base station in the form of a carrier, user equipment in the cell uses the identical carrier wave of carrier frequency, and there is normally only this carrier waves in the cell.Even if there is at least one small base station in the macro base station, the carrier frequency that the user equipment in these small base station coverage areas uses is also equal with the carrier frequency of macro base station transmission.The carrier frequency that neighboring community uses is different.

In embodiments of the present invention, the load balancing apparatus be in the same frequency dual link region user device configuration with frequency carrier wave set, the i.e. described load balancing apparatus, which is utilized, polymerize (Carrier Aggregation with carrier wave, CA) similar polymerization technique handles the carrier wave sent in the macro base station, so that the macro base station and the small base station of the target can be connected to simultaneously by being configured with the user equipment of the same frequency carrier wave set.CA technology is the technology for the increase transmission bandwidth that LTE system introduces, for meeting the requirement of single user peak rate and power system capacity promotion.CA technology can condense together 2~5 LTE member carriers (Component Carrier, CC), realize the transmission bandwidth of maximum 100MHz, effectively increase downstream transmission rate.In general, the carrier frequency of member carrier is not identical in CA technology.By CA technology, each user equipment uses independent hybrid automatic repeat-request (Hybrid Automatic Repeat Request, HARQ) entity on each carrier, and each transmission block can only be mapped on specific one carrier wave.Physical Downlink Control Channel (Physical Downlink Control Channel above each carrier wave, PDCCH) mutually indepedent, PDCCH using each carrier wave is Physical Downlink Shared Channel (the Physical Downlink Shared Channel of each carrier wave,) and Physical Uplink Shared Channel (Physical Uplink Shared Channel, PUSCH) channel distribution resource PDSCH.Also carrier wave instructions field can be used using on a carrier wave The uplink and downlink resource allocation of the multiple carrier waves of PDCCH channel dispatch, to realize high-speed transfer.

Polymerization technique in the embodiment of the present invention point different from CA technology is, what CA technology polymerize is the carrier wave of 2 or more different frequencies, so that user equipment obtains biggish bandwidth, and the polymerization technique in the embodiment of the present invention is 1 carrier wave sent using the macro base station while being connected to the macro base station and the small base station of the target.The macro base station and/or the small base station of the target may be implemented using the polymerization technique in the embodiment of the present invention and provide dispatch service for the user equipment in the same frequency dual link region.

S102 determines the location information of the UE according to the signal strength of the small base station of the target of UE measurement, and distributes serving BS according to the positional information for the UE.

Optionally, the signal strength for the small base station of the target that the load balancing apparatus is measured according to the UE determines the location information of the UE.Since the same frequency dual link region includes the region C and the region D in Fig. 1, but not knowing the UE on earth is in the region C or the region D, and the load balancing apparatus is different with the user equipment processing mode in the region D for the region C, therefore the load balancing apparatus needs first to determine the location information of the UE.

Optionally, the signal strength for the small base station of the target that the load balancing apparatus is measured according to the UE obtains the offset parameter of the signal strength of the small base station of the target of UE measurement, and judge the signal strength of the small base station of the target of the UE measurement offset parameter and the region C offset parameter it is identical or identical as the offset parameter in the region D.When the offset parameter of the signal strength of the small base station of the target of UE measurement is identical as the offset parameter in the region C, determine that the UE is located in the region C；When the offset parameter of the signal strength of the small base station of the target of UE measurement is identical as the offset parameter in the region D, determine that the UE is located in the region D.

Optionally, the load balancing apparatus is the UE distribution serving BS according to the positional information.Cellular communication system will transmit different types of information, including business information and various control information, thus arrange corresponding logic channel on the physical channel.These logic channel some are used for calling phase, and some is for communicating in progress, also in All Time of some for system operation.Logic channel is divided into Traffic Channel and control channel two major classes.Control channel is used to transmit the channel of signaling information and short packet data.

When the UE is located at the region C, due to the control channel provided close to the small base station of the target, the UE using the small base station of the target；When the UE is located at the region D, in comparison, closely farther out from the small base station of the target from the macro base station, therefore the control channel that the UE is provided using the macro base station.

Since the user equipment in the same frequency dual link region is connected to the macro base station and the small base station of the target simultaneously, according to CA technology, the uplink scheduling and descending scheduling of the user equipment in the same frequency dual link region can be carried out independently, without bundling.Optionally, when the UE is located at the region C, since the load close to the small base station of the target and the small base station of the target is low, utilization rate is low, the uplink service and downlink business of the UE provides dispatch service by the small base station of the target.When the UE is located at the region D, due to more closely farther out from the small base station of the target from the macro base station, and for user equipment, downlink business is to bandwidth, the requirement of network speed is usually above downlink business to bandwidth, the requirement of network speed, the band of the usual macro base station is wider than the bandwidth of the small base station, therefore the downlink business of the UE provides dispatch service by the macro base station, the uplink service of the UE provides dispatch service by the small base station of the target, both demand of the user equipment to bandwidth had been can guarantee, load in the balanced heterogeneous network of energy again, it is also avoided that the influence of the interference signal of macro base station to the useful signal of small base station simultaneously.

Fig. 3 is referred to, for the flow diagram of another load-balancing method provided in an embodiment of the present invention, the method comprising the steps of S201- step S215.

S201 counts the signal strength of the small base station of target associated with the macro base station of all user equipment measurements in the overlay area of macro base station.

Optionally, the load balancing apparatus counts the signal strength of the small base station of target associated with the macro base station of all user equipment measurements in the overlay area of the macro base station.Before load balancing apparatus executes step S201, the load balancing apparatus needs first to determine the overlay area of some macro base station in heterogeneous network, usual macro base station coverage area is the circle that radius is 10km, and detects in the overlay area of the macro base station and whether there is small base station.In heterogeneous network, including at least one macro base station and at least one small base station, the embodiment of the present invention select a macro base station to be introduced from least one macro base station.If the area of coverage of the macro base station It whether there is small base station in domain, then using the small base station in the macro base station coverage area as the small base station of target associated with the macro base station.In practical application, the small base station of possible more than one in the overlay area of the macro base station, in order to facilitate understanding, the embodiment of the present invention selects one to be introduced as the small base station of target from the small base station in the overlay area of the macro base station, and there are the case where multiple associations small base station to be analogized according to embodiments of the present invention.

Since the overlay area of the macro base station is larger, and the small base station of target also is located in the coverage area of the macro base station, therefore the load balancing apparatus counts the signal strength of the small base station of the target of all user equipment measurements in the region in the overlay area of the macro base station in addition to the original overlay area of the small base station of the target, i.e. the signal strength of the small base station of the target of all user equipment measurements in a-quadrant, the region C and the region D in Fig. 1.

S202 is extended the overlay area of the small base station of the target according to the signal strength of the small base station of the target of all user equipmenies measurement, so that the overlay area of the small base station of the target after extension includes original overlay area and with frequency dual link region.

Optionally, the load balancing apparatus just obtains the original overlay area of the small base station of the target after determining the small base station of the target, and the original overlay area of the small base station of target corresponds to the B area in Fig. 1.The signal strength of the small base station of the target of user equipment measurement in the original overlay area of the small base station of the target is higher than the signal strength of the macro base station, and on the boundary line of the original overlay area in the small base station of the target, the signal strength of the small base station of target is equal with the signal strength of the macro base station.

Optionally, the restricting the number intensity for the small base station of the target that the load balancing apparatus is measured according to all user equipmenies is extended the overlay area of the small base station of the target, so that certain user equipmenies in the overlay area of the macro base station could be used that the information that the small base station of the target provides, to improve the utilization rate of the small base station of the target.Boundary line of the extended area next to the original overlay area of the small base station of the target, except the original overlay area of the small base station of the target, and the signal strength for the small base station of the target that the user equipment in the extended area measures is all larger than preset threshold, the preset threshold is the signal strength for the small base station of the target that the user equipment in D regional edge boundary line measures, and specific value is set by the network management personnel of the load balancing apparatus.In the prior art, the small base station of the target is extended using CRE technology, but it is limited using the region that CRE technology is extended, and the overlay area of the small base station can be extended to the region that can receive the small base station signal of the target by the embodiment of the present invention, improve the area coverage of the small base station of the target to greatest extent.

Optionally, the extended area is determined as same frequency dual link region by the load balancing apparatus, and the same frequency dual link region includes the first extended area and the second extended area.Wherein, first extended area is close to the region of the original overlay area, corresponding to the region C in Fig. 1.Second extended area is the region far from the original overlay area, corresponding to the region D in Fig. 1.The offset parameter of the signal strength of the small base station of the target in first extended area is greater than the offset parameter of the signal strength of the small base station of the target in second extended area.

Optionally, the offset parameter of the signal strength of the small base station of the target is the Reference Signal Received Power RSRP of the small base station of the target.Such as, the offset parameter for configuring the region C is -10dB, the offset parameter in the region D is -20dB, indicate that the RSRP of the small base station of target continues to extend to the outside -10dB and -20dB since the boundary line of B area, RSRP i.e. in the region C reduces 10dB than B area, and the RSRP in the region D reduces 20dB than B area.It should be noted that, the signal strength of the small base station of target is different with the signal strength offset parameter of the small base station of the target, the signal strength for the small base station of the target that user equipment in the region C detects may be different, but the signal strength offset parameter of the small base station of the target in the region is identical.

S203 obtains the signal strength of the small base station of the target of the UE measurement when knowing that user equipment (UE) is connected to the macro base station.

Optionally, the load balancing apparatus monitors the connection of the user equipment in the macro base station coverage area in real time, when knowing that user equipment (UE) is connected to the macro base station, the signal strength of the small base station of the target of the UE measurement is obtained, so that the load balancing apparatus judges which region that the UE is in Fig. 1.

S204 judges whether the UE is in same frequency dual link region according to the signal strength of the small base station of the target of UE measurement.

Optionally, the signal strength for the small base station of the target that the load balancing apparatus is measured according to the UE judges whether the UE belongs to same frequency dual link region, and the same frequency dual link region is the extended area being extended to the overlay area of the small base station of the target.Wherein, the same frequency dual link region corresponds to the region C and the region D in Fig. 1.The UE can both measure the signal strength of the small base station of the target in the same frequency dual link region, the signal strength of the macro base station can be measured again, the signal strength of the macro base station usually in the same frequency dual link region is higher than the signal strength of the small base station of the target, but since the user equipment in the macro base station coverage area is more, if the same frequency dual link region Interior user equipment is all connected to the macro base station and uses the resource on the macro base station, the bandwidth that may cause each user equipment point in the same frequency dual link region is smaller, it is unfavorable for the transmission of data, and the small base station of target is likely to be at idle state, the load excess for not only resulting in the macro base station has an effect on the experience of same frequency dual link area intra domain user.Therefore, the user equipment in the same frequency dual link region in the embodiment of the present invention both may be coupled on the macro base station, it is may be coupled on the small base station of the target again, the load balancing apparatus is that user equipment distributes the macro base station and/or the small base station of the target as serving BS according to the specific location of user equipment, both the load of the macro base station will not be caused to bear, user experience will not be influenced.The specific implementation process of step S204 can be found in flow diagram shown in Fig. 4.

Fig. 4 is referred to, is the flow diagram that the step S204 in embodiment illustrated in fig. 3 is realized, step S204 may include step S301- step S304.

S301, judges whether the signal strength of the small base station of the target of the UE measurement is greater than the preset threshold.

Optionally, the load balancing apparatus first determines whether the signal strength of the small base station of the target of the UE measurement is greater than the preset threshold.When the result that step S301 judges is is, it is to be appreciated that the UE can be measured that the signal strength of the small base station of the target and be greater than the preset threshold；When the result that step S302 judges is no, it can be understood that the signal strength that the UE measures the small base station of the target is less than the preset threshold or the signal strength of the small base station of the target is not measured in the UE, i.e., the described UE is now placed in the a-quadrant in Fig. 1.

S302 judges whether the signal strength of the small base station of the target of the UE measurement is less than the signal strength on the original coverage area boundaries line of the small base station of the target when the result judged is is.

Optionally, when the result that step S301 judges is is, it can be understood that the UE can be measured that the signal strength of the small base station of the target and be greater than the preset threshold, therefore the load balancing apparatus judges whether the signal strength of the small base station of the target of the UE measurement is less than the signal strength on the original coverage area boundaries line of the small base station of the target again, further determines that the extended area other than the B area or B area that the UE is located in Fig. 1.

S303 determines that the UE belongs to the same frequency dual link region when the result judged is is.

Optionally, when the result that execution step S302 judges is is, it can be understood that the signal strength of the small base station of the target of the UE measurement is less than the signal strength on the original coverage area boundaries line of the small base station of the target, determine that the UE belongs to the same frequency dual link region, the same frequency dual link region Corresponding to the region C and the region D in Fig. 1.

S304 determines that the UE belongs to the original overlay area of the small base station of the target when the judgment result is no.

Optionally, when the result that execution step S302 judges is no, it can be understood that the signal strength of the small base station of the target of the UE measurement is equal to or more than the signal strength on the original coverage area boundaries line of the small base station of the target, determine that the UE belongs to the original overlay area of the small base station of the target, corresponding to the B area in Fig. 1.

S205, when the UE is in the same frequency dual link region, Xiang Suoshu UE sends dual link instruction.

Optionally, when the result that execution step S204 judges is is, the i.e. described UE belongs to the same frequency dual link region, the carrier wave that the load balancing apparatus is sent according to the macro base station is the user device configuration in the same frequency dual link region with frequency carrier wave set, and dual link instruction is sent to the same frequency carrier wave set of the UE, the dual link instruction is used to indicate the UE while being connected to the macro base station and the small base station of the target.The same frequency carrier wave set includes same frequency main plot and with frequency secondary cell, and the same frequency main plot is the macro base station, and the same frequency secondary cell is the small base station of the target.The dual link that user equipment in the same frequency dual link region is sent according to the load balancing apparatus is instructed while being connected on the macro base station and the small base station of the target, it can be understood that carrier wave that the user equipment for being configured with the same frequency carrier wave set is sent using the macro base station while being connected to the macro base station and the small base station of the target, therefore it is possible to prevente effectively from the case where interference signal of macro base station described in the prior art influences the useful signal of the small base station of the target.

Wherein, the dual link instruction organizes carrier wave to polymerize existing instruction using 3GPP, i.e., carrier wave is polymerize existing instruction and be also employed in the load balancing apparatus.

S206 obtains the offset parameter of the signal strength of the small base station of the target of the UE measurement.

Optionally, the load balancing apparatus obtains the offset parameter of the signal strength of the small base station of the target of the UE measurement, is the region C or the region D in Fig. 1 to determine the UE on earth.The load balancing apparatus can directly detect the offset parameter, and the offset parameter that will test with it is described The offset parameter of the signal strength of the small base station of the target of first extended area and second extended area sits comparison, determines the UE in which region.

S207, when the offset parameter got is identical as the offset parameter of signal strength of the small base station of the target in first extended area, it determines that the UE is located in first extended area, and distributes the small base station of target as serving BS for the UE.

Optionally, when the offset parameter got is identical as the offset parameter of signal strength of the small base station of the target in first extended area, determine that the UE is located in first extended area, corresponding to the region C in Fig. 1.

Optionally, when the UE is located in first extended area, due to distributing the small base station of target as serving BS for the UE close to the small base station of the target.The small base station of target provides control channel and uplink service and downlink business for user equipment interior in first extended area.

S208, when the offset parameter got is identical as the offset parameter of signal strength of the small base station of the target in second extended area, it determines that the UE is located in second extended area, and distributes the macro base station and the small base station of the target as serving BS for the UE.

Optionally, when the offset parameter got is identical as the offset parameter of signal strength of the small base station of the target in second extended area, determine that the UE is located in second extended area, corresponding to the region D in Fig. 1.

Optionally, when the UE is located in second extended area, the load balancing apparatus is that the UE distributes the macro base station and the small base station of the target as serving BS.In comparison the control channel of the macro base station closely farther out from the small base station of the target from the macro base station, therefore is supplied to the UE and used by second extended area and first extended area.For user equipment, requirement of the downlink business to bandwidth, network speed is usually above requirement of the downlink business to bandwidth, network speed, the band of the usual macro base station is wider than the bandwidth of the small base station, therefore the downlink business of the UE in second extended area provides dispatch service by the macro base station, the uplink service of the UE provides dispatch service by the small base station of the target, both demand of the user equipment to bandwidth had been can guarantee, again can load in balanced heterogeneous network, while being also avoided that the influence of the interference signal of macro base station to the useful signal of small base station.

S209 monitors the load capacity of the macro base station and the small base station of the target.

Optionally, due in LTE system according to specific Transmission Time Interval (Transmission Time Interval, TTI) in heterogeneous network macro base station and small base station be scheduled, usual TTI be 1ms, because The load balancing apparatus in this embodiment of the present invention is also scheduled the macro base station and the small base station of the target according to the TTI in LTE system.During scheduling, the load balancing apparatus needs the load capacity of macro base station described in real-time monitoring and the small base station of the target, to be neatly that the UE distributes serving BS.

S210 is that the UE distributes serving BS when the load capacity of the macro base station is higher than the load capacity of the first preset threshold or the small base station of the target higher than the second preset threshold again.

Optionally, when the user equipment in the same frequency dual link region is excessive, the load capacity that may result in the macro base station is higher than the first preset threshold or the load capacity of the small base station of the target is higher than the second preset threshold, primary mechanism is dispatched according to the every TTI of LTE system, the load balancing apparatus is that the user equipment in the same frequency dual link region redistributes serving BS, with the load of the balanced macro base station and the small base station of the target, and the resource of the macro base station and the small base station of the target is made full use of, improve the utilization rate of the small base station of the target.Wherein, first preset threshold is the ultimate load that guarantees the user equipment in the macro base station coverage area and can work normally, and the experience of user may be influenced when higher than first preset threshold.Second preset threshold is the ultimate load that guarantees the user equipment in the small base station coverage area of target and can work normally, and usual second preset threshold is less than first preset threshold.

In embodiments of the present invention, by when user equipment (UE) is in frequency dual link region, dual link instruction is sent to the UE, the dual link instruction is used to indicate the UE while being connected to macro base station and the small base station of target associated with the macro base station, the same frequency dual link region is the extended area being extended to the overlay area of the small base station of the target, then the location information of the UE is determined according to the signal strength of the small base station of the target of UE measurement, and serving BS is distributed for the UE according to the positional information, to flexibly, rapidly realize the adjusting to loading in heterogeneous network, load in balanced heterogeneous network, further expand the overlay area of small base station, improve the utilization rate of small base station, it is also avoided that influence of the macro base station interference signal to small base station useful signal simultaneously.

Fig. 5 is referred to, is the flow diagram of another load-balancing method provided in an embodiment of the present invention, the method comprising the steps of S401- step S403.

S401 is established and the connection between macro base station and the small base station of target associated with the macro base station when receiving the dual link instruction of load balancing apparatus transmission.

Optionally, user equipment (UE) can receive load balancing apparatus and send during mobile or static Instruction.It should be noted that, user device configuration in the embodiment of the present invention is the same as frequency carrier wave set, when user equipment is in frequency dual link region, the dual link that can be sent according to the load balancing apparatus instructs while being connected to macro base station and the small base station of target associated with the macro base station.When the UE receives the dual link instruction that the load balancing apparatus is sent, show that the UE is located at in frequency dual link region at this time, the UE just instructs the connection established between the small base station of the target while establishing and connecting between the macro base station according to the dual link, so that the UE can be connected to the macro base station and the small base station of the target simultaneously.In the prior art, the UE typically sets up the connection between the macro base station, if the small base station of the target need to be connected to, then disconnect the connection between the macro base station, it is connected to the small base station of the target, the interference signal of the macro base station will be made to influence the useful signal of the small base station of the target in this way, to influence the normal communication of user equipment.Wherein, the same frequency dual link region is to be extended to the coverage area of the small base station of the target, including the first extended area and the second extended area correspond respectively to the region C in Fig. 1 and the region D.

S402, measure the signal strength of the small base station of the target, and the signal strength of the small base station of the target of measurement is fed back into the load balancing apparatus, so that the load balancing apparatus determines the location information of this equipment and distributes serving BS according to the positional information for this equipment.

Optionally, the UE measures the signal strength of the small base station of the target, and the signal strength of the small base station of the target of measurement is fed back into the load balancing apparatus, so that the load balancing apparatus determines the location information of the UE and distributes serving BS according to the positional information for the UE.Wherein, the serving BS may be the small base station of the target, it is also possible to the small base station of target and the macro base station, depending on the location information of the UE.At this time, the load balancing apparatus only determines that the UE is in the same frequency dual link region, but the region C or the region D that the UE is located in Fig. 1 are not known, therefore the load balancing apparatus needs the signal strength of the small base station of the target measured according to the UE to determine the more specific location information of the UE.

S403 obtains the location information that the load balancing apparatus determines, and the serving BS distributed using the load balancing apparatus.

Optionally, the UE obtains the location information that the load balancing apparatus determines, and the serving BS distributed using the load balancing apparatus.Specifically, when the UE is located at first extended area, i.e. the region C in Fig. 1, the serving BS is the small base station of the target, the control channel that the UE is provided using the small base station of the target at this time, and receive the small base station scheduling of the target uplink service and Downlink business；When the UE is located at second extended area, that is the region D in Fig. 1, the serving BS are the macro base station and the small base station of the target, the control channel that the UE is provided using the macro base station, receive the downlink business of the macro base station scheduling, the uplink service of the small base station scheduling of target.

In embodiments of the present invention, by when receiving the dual link instruction of load balancing apparatus transmission, it establishes and the connection between macro base station and the small base station of target associated with the macro base station, and measure the signal strength of the small base station of the target, then the signal strength of the small base station of the target of measurement is fed back into the load balancing apparatus, finally obtain the location information that the load balancing apparatus determines, and the serving BS distributed using the load balancing apparatus, to reduce influence of the switching base station to user equipment, the utilization rate of small base station is improved.

It describes in detail below in conjunction with attached drawing 6- attached drawing 11 to load balancing apparatus provided in an embodiment of the present invention, user equipment.It should be noted that, load balancing apparatus shown in attached drawing 6- attached drawing 9 and attached drawing 11, method for executing Fig. 2 of the present invention and embodiment illustrated in fig. 3, the method that attached user equipment shown in Fig. 10 is used to execute embodiment illustrated in fig. 5 of the present invention, for ease of description, only parts related to embodiments of the present invention are shown, disclosed by specific technical details, please refers to Fig. 2, Fig. 3 of the present invention and embodiment shown in fig. 5.

Fig. 6 is referred to, is a kind of structural schematic diagram of load balancing apparatus provided by the invention, the load balancing apparatus 10 can include: instruction sending unit 101 and base station allocation unit 102.

Instruction sending unit 101, for when user equipment (UE) is in frequency dual link region, Xiang Suoshu UE to send dual link instruction.

Optionally, when user equipment (UE) is in frequency dual link region, described instruction transmission unit 101 sends dual link instruction to the UE, the dual link instruction is used to indicate the UE while being connected to macro base station and the small base station of target associated with the macro base station, and the same frequency dual link region is the extended area being extended to the overlay area of the small base station of the target.The carrier wave that the load balancing apparatus 10 is sent according to the macro base station is the user device configuration in the same frequency dual link region with frequency carrier wave set, when the UE is located at the same frequency dual link region, instruction sending unit 101 sends dual link instruction to the same frequency carrier wave set of the UE, indicates the UE while being connected to the macro base station and the small base station of the target.The dual link that user equipment in the same frequency dual link region is sent according to the load balancing apparatus is instructed while being connected on the macro base station and the small base station of the target, it is to be appreciated that is configured with described with frequency load The carrier wave that the user equipment of wave group is sent using the macro base station is connected to the macro base station and the small base station of the target, therefore it is possible to prevente effectively from the case where interference signal of macro base station described in the prior art influences the useful signal of the small base station of the target simultaneously.

Before described instruction transmission unit 101 sends the dual link instruction, the load balancing apparatus 10 is it needs to be determined that whether the UE is in the same frequency dual link region.The UE can measure the signal strength of the small base station of the target at any time in moving process or stationary state, can also measure the signal strength of the macro base station.Since the small base station of the target is also included in the coverage area of the macro base station, and the coverage area of the macro base station is larger, determine that the accuracy of the position UE is lower according to the signal strength of the macro base station, therefore the signal strength of the small base station of the target that the load balancing apparatus 10 in the embodiment of the present invention is measured according to the UE determines which region that the UE belongs in Fig. 1.Specifically, it may be zero that the signal strength of the small base station of the target of the UE measurement is weaker when the UE belongs to a-quadrant；When the UE belongs to the region C or the region D, the signal intensity ratio a-quadrant of the small base station of the target of the UE measurement is strong, greater than preset threshold, the preset threshold is the signal strength for the small base station of the target that the user equipment in D regional edge boundary line measures, specific value is set by the network management personnel of the load balancing apparatus, and the signal strength of the small base station of the target is less than the signal strength of the macro base station；When the UE belongs to B area, the signal strength of the small base station of the target of the UE measurement is greater than or equal to the signal strength of the macro base station.

Wherein, the same frequency dual link region corresponds to the region C and the region D in Fig. 1, is the extended area of the small base station of the target.The UE can both measure the signal strength of the small base station of the target in the same frequency dual link region, the signal strength of the macro base station can be measured again, the signal strength of the macro base station usually in the same frequency dual link region is higher than the signal strength of the small base station of the target, but since the user equipment in the macro base station coverage area is more, if the user equipment in the same frequency dual link region is all connected to the macro base station using the resource on the macro base station, the same frequency dual link area may cause The bandwidth of each user equipment point is smaller in domain, is unfavorable for the transmission of data, and the small base station of the target is likely to be at idle state, does not only result in the load excess of the macro base station, has an effect on the experience of same frequency dual link area intra domain user.Therefore, the user equipment in the same frequency dual link region in the embodiment of the present invention both may be coupled on the macro base station, it is may be coupled on the small base station of the target again, the load balancing apparatus 10 is that user equipment distributes the macro base station and/or the small base station of the target as serving BS according to the specific location of user equipment, both the load of the macro base station will not be caused to bear, user experience will not be influenced.

Fig. 7 is referred to, for the structural schematic diagram for the instruction sending unit that embodiment illustrated in fig. 6 provides.Described instruction transmission unit 101 may include same frequency configuration unit 1011 and connection indicating unit 1012.

With frequency configuration unit 1011, carrier wave for being sent according to the macro base station is the user device configuration in the same frequency dual link region with frequency carrier wave set, the same frequency carrier wave set includes same frequency main plot and with frequency secondary cell, the same frequency main plot is the macro base station, and the same frequency secondary cell is the small base station of the target.

Optionally, the carrier wave that the same frequency configuration unit 1011 is sent according to the macro base station is the user device configuration in the same frequency dual link region with frequency carrier wave set, the same frequency carrier wave set includes same frequency main plot and with frequency secondary cell, the same frequency main plot is the macro base station, and the same frequency secondary cell is the small base station of the target.It is realized in the embodiment of the present invention using the carrier wave that the macro base station is sent twice and covers the same frequency carrier wave set, it realizes while covering the same frequency main plot and the same frequency secondary cell, so that the macro base station and the small base station of the target can be connected to simultaneously by being configured with the user equipment of the same frequency carrier wave set.

In embodiments of the present invention, the load balancing apparatus 10 be in the same frequency dual link region user device configuration with frequency carrier wave set, the i.e. described load balancing apparatus is handled the carrier wave sent in the macro base station using the polymerization technique similar with carrier wave polymerization CA, so that the macro base station and the small base station of the target can be connected to simultaneously by being configured with the user equipment of the same frequency carrier wave set.CA technology is the technology for the increase transmission bandwidth that LTE system introduces, for meeting the requirement of single user peak rate and power system capacity promotion.CA technology can condense together 2~5 LTE member carriers, realize the transmission bandwidth of maximum 100MHz, effectively increase downstream transmission rate.In general, in CA technology member carrier load Wave frequency rate is not identical.By CA technology, each user equipment uses independent HARQ entity on each carrier, and each transmission block can only be mapped on specific one carrier wave.PDCCH above each carrier wave is mutually indepedent, and the PDCCH using each carrier wave is PDSCH the and PUSCH channel distribution resource of each carrier wave.Also carrier wave instructions field can be used using the uplink and downlink resource allocation of the multiple carrier waves of PDCCH channel dispatch on a carrier wave, to realize high-speed transfer.

Connect indicating unit 1012, for sending dual link instruction to the same frequency carrier wave set of the UE, the dual link instruction is used to indicate the UE while being connected to the macro base station and the small base station of the target, and it is connected to main connection by be connected to the macro base station, be connected to the small base station of the target is connected to auxiliary connection.

Optionally, it connects indicating unit 1012 and sends dual link instruction to the same frequency carrier wave set of the UE, the dual link instruction is used to indicate the UE while being connected to the macro base station and the small base station of the target, and it is connected to main connection by be connected to the macro base station, be connected to the small base station of the target is connected to auxiliary connection.It should be noted that user equipment is switched to the small base station of the target from the macro base station unlike CRE technology by the user equipment in the same frequency dual link region, but it is connected to the macro base station and the small base station of the target simultaneously.

The signal strength of base station allocation unit 102, the small base station of the target for being measured according to the UE determines the location information of the UE, and distributes serving BS according to the positional information for the UE.

Optionally, the signal strength for the small base station of the target that the base station allocation unit 102 is measured according to the UE determines the location information of the UE.Since the same frequency dual link region includes the region C and the region D in Fig. 1, but not knowing the UE on earth is in the region C or the region D, and the load balancing apparatus 10 is different with the user equipment processing mode in the region D for the region C, therefore the base station allocation unit 102 needs first to determine the location information of the UE.Using the region C in Fig. 1 as One extended area, the region D is as the second extended area.First extended area is close to the region of the original overlay area, and second extended area is the region far from the original overlay area.The offset parameter of the signal strength of the small base station of the target in first extended area is greater than the offset parameter of the signal strength of the small base station of the target in second extended area.After the location information of the UE determines, the base station allocation unit 102 distributes serving BS according to the positional information for the UE.The specific structure of the base station allocation unit 102 refers to Fig. 8.

Fig. 8 is referred to, for the structural schematic diagram for the base station allocation unit that embodiment illustrated in fig. 6 provides.The base station allocation unit 102 may include parameter acquiring unit 1021, the first allocation unit 1022 and the second allocation unit 1023.Wherein, first allocation unit 1022 includes first control unit 1122 and the second control unit 1222, and second allocation unit 1023 includes third control unit 1123 and the 4th control unit 1223.

Parameter acquiring unit 1021, the offset parameter of the signal strength of the small base station of the target for obtaining the UE measurement.

Optionally, the signal strength for the small base station of the target that the parameter acquiring unit 1021 is measured according to the UE obtains the offset parameter of the signal strength of the small base station of the target of the UE measurement, is the region C or the region D in Fig. 1 to determine the UE on earth.The parameter acquiring unit 1021 can directly detect the offset parameter, and the offset parameter of the signal strength of the small base station of the target of the offset parameter that will test and first extended area and second extended area is sat and is compared, and determines the UE in which region.

First allocation unit 1022, for when the offset parameter got is identical as the offset parameter of signal strength of the small base station of the target in first extended area, it determines that the UE is located in first extended area, and distributes the small base station of target as serving BS for the UE.

Optionally, when the offset parameter that the parameter acquiring unit 1021 is got is identical as the offset parameter of signal strength of the small base station of the target in first extended area, first allocation unit 1022 determines that the UE is located in first extended area, corresponding to the region C in Fig. 1.

When the UE is located in first extended area, first allocation unit 1022 is that the UE distributes the small base station of target as serving BS, but and do not turn off the connection between the macro base station, control channel and Traffic Channel are provided for the UE by the small base station of the target, to improve the utilization rate of the small base station of the target.Specifically, first allocation unit 1022 includes 1122 He of first control unit Second control unit 1222.

First control unit 1122 provides control channel for controlling the small base station of the target for the UE.

Optionally, the first control unit 1122 controls the small base station of the target and provides control channel for the UE.

Second control unit 1222 dispatches the uplink service and downlink business of the UE for controlling the small base station of the target.

Optionally, second control unit 1222 controls the uplink service and downlink business that the UE is dispatched in the small base station of the target.It is closer from the original overlay area of the target BS since the UE is located at first extended area, therefore the UE can obtain preferable bandwidth using the business that the small base station of the target provides.

Second allocation unit 1023, for when the offset parameter got is identical as the offset parameter of signal strength of the small base station of the target in second extended area, it determines that the UE is located in second extended area, and distributes the macro base station and the small base station of the target as serving BS for the UE.

Optionally, when the offset parameter that the parameter acquiring unit 1021 is got is identical as the offset parameter of signal strength of the small base station of the target in second extended area, second allocation unit 1023 determines that the UE is located in second extended area, corresponding to the region D in Fig. 1.

Second allocation unit 1023 is that the UE distributes the macro base station and the small base station of the target as serving BS.Farther out from the small base station of the target due to second extended area, closer from the macro base station, therefore the macro base station and the small base station of the target are distributed into the UE as serving BS.At this point, serving BS flexibly can be distributed for the UE according to the loading condition of the macro base station and the small base station of the target.Specifically, second allocation unit 1023 includes first control unit 1123 and the second control unit 1223.

Third control unit 1123 provides control channel for controlling the macro base station for the UE.

Optionally, when the UE is located in second extended area, the third control unit 1123 controls the macro base station and provides control channel for the UE, in this way can to avoid CRE technology due to the small base station control channel of the target is by the macro base station strong jamming and problem that spreading range is limited.

4th control unit 1223 dispatches the downlink business of the UE for controlling the macro base station, controls the uplink service that the UE is dispatched in the small base station of the target.

Optionally, the 4th control unit 1223 controls the lower industry that the macro base station dispatches the UE Business, controls the uplink service that the UE is dispatched in the small base station of the target.For user equipment, requirement of the downlink business to bandwidth, network speed is usually above requirement of the downlink business to bandwidth, network speed, the band of the usual macro base station is wider than the bandwidth of the small base station, therefore the downlink business of the UE in second extended area provides dispatch service by the macro base station, the uplink service of the UE provides dispatch service by the small base station of the target, both demand of the user equipment to bandwidth had been can guarantee, again can load in balanced heterogeneous network, while being also avoided that the influence of the interference signal of macro base station to the useful signal of small base station.

Refer to Fig. 9, for the structural schematic diagram of another load balancing apparatus provided in an embodiment of the present invention, the load balancing apparatus 20 may include region expanding element 201, intensity acquiring unit 202, region decision unit 203, instruction sending unit 204, base station allocation unit 205, load capacity monitoring unit 206 and redistribute unit 207.Wherein, region decision unit 203 includes the first judging unit 2031, second judgment unit 2032 and relation determination unit 2033.Wherein, instruction sending unit 204 and the specific structure of base station allocation unit 205 can be found in the instruction sending unit 101 in embodiment illustrated in fig. 6 and the specific structure with base station allocation unit 102, and details are not described herein.

Region expanding element 201, it is extended for the overlay area to the small base station of target associated with macro base station, so that the overlay area of the small base station of the target after extension includes original overlay area and with frequency dual link region, the signal strength of the small base station of the target on the original coverage area boundaries line is equal with the signal strength of the macro base station, and the signal strength of the small base station of the target in the same frequency dual link region is greater than preset threshold.

Optionally, the region expanding element 201 is extended the overlay area of the small base station of target associated with macro base station, so that the overlay area of the small base station of the target after extension includes original overlay area and with frequency dual link region, the signal strength of the small base station of the target on the original coverage area boundaries line and institute The signal strength for stating macro base station is equal, and the signal strength of the small base station of the target in the same frequency dual link region is greater than preset threshold.Specifically, the region expanding element 201 counts the signal strength of the small base station of target associated with the macro base station of all user equipment measurements in the overlay area of macro base station, and is extended according to the signal strength of the small base station of the target of all user equipment measurements to the overlay area of the small base station of the target.

The region expanding element 201 counts the signal strength of the small base station of target associated with the macro base station of all user equipment measurements in the overlay area of the macro base station.Before region expanding element 201 is counted, the load balancing apparatus 20 needs first to determine the overlay area of some macro base station in heterogeneous network, usual macro base station coverage area is the circle that radius is 10km, and detects in the overlay area of the macro base station and whether there is small base station.In heterogeneous network, including at least one macro base station and at least one small base station, the embodiment of the present invention select a macro base station to be introduced from least one macro base station.If whether there is small base station in the overlay area of the macro base station, using the small base station in the macro base station coverage area as the small base station of target associated with the macro base station.In practical application, the small base station of possible more than one in the overlay area of the macro base station, in order to facilitate understanding, the embodiment of the present invention selects one to be introduced as the small base station of target from the small base station in the overlay area of the macro base station, and there are the case where multiple associations small base station to be analogized according to embodiments of the present invention.

Since the overlay area of the macro base station is larger, and the small base station of target also is located in the coverage area of the macro base station, therefore the region expanding element 201 counts the signal strength of the small base station of the target of all user equipment measurements in the region in the overlay area of the macro base station in addition to the original overlay area of the small base station of the target, i.e. the signal strength of the small base station of the target of all user equipment measurements in a-quadrant, the region C and the region D in Fig. 1.

The load balancing apparatus 20 just obtains the original overlay area of the small base station of the target after determining the small base station of the target, and the original overlay area of the small base station of target corresponds to the B area in Fig. 1.The signal strength of the small base station of the target of user equipment measurement in the original overlay area of the small base station of the target is higher than the signal strength of the macro base station, and on the boundary line of the original overlay area in the small base station of the target, the signal strength of the small base station of target is equal with the signal strength of the macro base station.

Optionally, the restricting the number intensity for the small base station of the target that the region expanding element 201 is measured according to all user equipmenies is extended the overlay area of the small base station of the target, so that certain user equipmenies in the overlay area of the macro base station could be used that the information that the small base station of the target provides, to mention The utilization rate of the high small base station of target.Boundary line of the extended area next to the original overlay area of the small base station of the target, except the original overlay area of the small base station of the target, and the signal strength for the small base station of the target that the user equipment in the extended area measures is all larger than preset threshold, the preset threshold is the signal strength for the small base station of the target that the user equipment in D regional edge boundary line measures, and specific value is set by the network management personnel of the load balancing apparatus.In the prior art, the small base station of the target is extended using CRE technology, but it is limited using the region that CRE technology is extended, and the overlay area of the small base station can be extended to the region that can receive the small base station signal of the target by the embodiment of the present invention, improve the area coverage of the small base station of the target to greatest extent.

Wherein, the same frequency dual link region includes the first extended area and the second extended area.Wherein, first extended area is close to the region of the original overlay area, corresponding to the region C in Fig. 1.Second extended area is the region far from the original overlay area, corresponding to the region D in Fig. 1.The offset parameter of the signal strength of the small base station of the target in first extended area is greater than the offset parameter of the signal strength of the small base station of the target in second extended area.

Intensity acquiring unit 202, the signal strength of the small base station of the target for when knowing that user equipment (UE) is connected to the macro base station, obtaining the UE measurement.

Optionally, the load balancing apparatus 20 monitors the connection of the user equipment in the macro base station coverage area in real time, when knowing that user equipment (UE) is connected to the macro base station, the intensity acquiring unit 202 obtains the signal strength of the small base station of the target of the UE measurement, so that the load balancing apparatus judges which region that the UE is in Fig. 1.

The signal strength of region decision unit 203, the small base station of the target for being measured according to the UE judges whether the UE is in same frequency dual link region.

Optionally, the signal strength of the small base station of the target for the UE measurement that the region decision unit 203 is got according to the intensity acquiring unit 202 judges whether the UE belongs to same frequency dual link region, and the same frequency dual link region is the extended area being extended to the overlay area of the small base station of the target.Wherein, the same frequency dual link region corresponds to the region C and the region D in Fig. 1, is the extended area of the small base station of the target.The UE can both measure the signal strength of the small base station of the target in the same frequency dual link region, the signal strength of the macro base station can be measured again, the signal strength of the macro base station usually in the same frequency dual link region is higher than the signal strength of the small base station of the target, but since the user equipment in the macro base station coverage area is more, if the user equipment in the same frequency dual link region is all connected to the macro base station and uses the resource on the macro base station, the bandwidth that may cause each user equipment point in the same frequency dual link region is smaller, it is unfavorable for the transmission of data, and the small base station of target is likely to be at idle state, the load excess of the macro base station is not only resulted in, have an effect on the experience of same frequency dual link area intra domain user.Therefore, the user equipment in the same frequency dual link region in the embodiment of the present invention both may be coupled on the macro base station, it is may be coupled on the small base station of the target again, the load balancing apparatus 20 is that user equipment distributes the macro base station and/or the small base station of the target as serving BS according to the specific location of user equipment, both the load of the macro base station will not be caused to bear, user experience will not be influenced.

In embodiments of the present invention, the load balancing apparatus 20 be in the same frequency dual link region user device configuration with frequency carrier wave set, the i.e. described load balancing apparatus 20 is handled the carrier wave sent in the macro base station using with polymerization technique as carrier wave polymeric type, so that the macro base station and the small base station of the target can be connected to simultaneously by being configured with the user equipment of the same frequency carrier wave set.CA technology is the technology for the increase transmission bandwidth that LTE system introduces, for meeting the requirement of single user peak rate and power system capacity promotion.CA technology can condense together 2~5 LTE member carriers, realize the transmission bandwidth of maximum 100MHz, effectively increase downstream transmission rate.In general, the carrier frequency of member carrier is not identical in CA technology.By CA technology, each user equipment uses independent hybrid automatic repeat-request entity on each carrier, and each transmission block can only be mapped on specific one carrier wave.Above each carrier wave PDCCH is mutually indepedent, and the PDCCH using each carrier wave is PDSCH the and PUSCH channel distribution resource of each carrier wave.Also carrier wave instructions field can be used using the uplink and downlink resource allocation of the multiple carrier waves of PDCCH channel dispatch on a carrier wave, to realize high-speed transfer.

The region decision unit 203 may include the first judging unit 2031, second judgment unit 2032 and relation determination unit 2033.

First judging unit 2031, for judging whether the signal strength of the small base station of the target of the UE measurement is greater than the preset threshold.

Optionally, first judging unit 2031 first determines whether the signal strength of the small base station of the target of the UE measurement is greater than the preset threshold.When the result that first judging unit 2031 judges is is, it is to be appreciated that the UE can be measured that the signal strength of the small base station of the target and be greater than the preset threshold；When the result that the first judging unit 2031 judges is no, it can be understood that the signal strength that the UE measures the small base station of the target is less than the preset threshold or the signal strength of the small base station of the target is not measured in the UE, i.e., the described UE is now placed in the a-quadrant in Fig. 1.

Second judgment unit 2032 when result for judging when first judging unit is is, judges whether the signal strength of the small base station of the target of the UE measurement is less than the signal strength on the original coverage area boundaries line of the small base station of the target.

Optionally, when the result that first judging unit 2031 judges is is, it can be understood that the UE can be measured that the signal strength of the small base station of the target and be greater than the preset threshold, therefore the second judgment unit 2032 judges whether the signal strength of the small base station of the target of the UE measurement is less than the signal strength on the original coverage area boundaries line of the small base station of the target, further determines that the extended area other than the B area or B area that the UE is located in Fig. 1.

Relation determination unit 2033 determines that the UE belongs to the same frequency dual link region when result for judging when the second judgment unit is is.

Optionally, when the result that the second judgment unit 2032 judges is is, it is to be appreciated that institute The signal strength of the small base station of the target of UE measurement is stated less than the signal strength on the original coverage area boundaries line of the small base station of the target, the relation determination unit 2033 determines that the UE belongs to the same frequency dual link region, and the same frequency dual link region corresponds to the region C and the region D in Fig. 1.When the result that the second judgment unit 2032 judges is is, it can be understood that the signal strength of the small base station of the target of the UE measurement is equal to or more than the signal strength on the original coverage area boundaries line of the small base station of the target, determine that the UE belongs to the original overlay area of the small base station of the target, corresponding to the B area in Fig. 1.

Instruction sending unit 204, for when user equipment (UE) is in frequency dual link region, dual link instruction is sent to the UE, the dual link instruction is used to indicate the UE while being connected to macro base station and the small base station of target associated with the macro base station, and the same frequency dual link region is the extended area being extended to the overlay area of the small base station of the target.

The signal strength of base station allocation unit 205, the small base station of the target for being measured according to the UE determines the location information of the UE, and distributes serving BS according to the positional information for the UE.

Load capacity monitoring unit 206, for monitoring the load capacity of the macro base station and the small base station of the target.

Optionally, due in LTE system according to specific Transmission Time Interval (Transmission Time Interval, TTI) in heterogeneous network macro base station and small base station be scheduled, usual TTI is 1ms, therefore the load balancing apparatus 20 in the embodiment of the present invention is also scheduled the macro base station and the small base station of the target according to the TTI in LTE system.During scheduling, the load capacity monitoring unit 206 needs the load capacity of macro base station described in real-time monitoring and the small base station of the target, to be neatly that the UE distributes serving BS.

Unit 207 being redistributed, being again that the UE distributes serving BS when for being higher than the load capacity of the first preset threshold or the small base station of the target when the load capacity of the macro base station higher than the second preset threshold.

Optionally, when the user equipment in the same frequency dual link region is excessive, the load capacity that may result in the macro base station is higher than the first preset threshold or the load capacity of the small base station of the target is higher than the second preset threshold, primary mechanism is dispatched according to the every TTI of LTE system, the unit 207 of redistributing is that the user equipment in the same frequency dual link region redistributes serving BS, with the load of the balanced macro base station and the small base station of the target, and the resource of the macro base station and the small base station of the target is made full use of, improve the utilization rate of the small base station of the target.Wherein, first preset threshold is the ultimate load that guarantees the user equipment in the macro base station coverage area and can work normally, and may influence to use when higher than first preset threshold The experience at family.Second preset threshold is the ultimate load that guarantees the user equipment in the small base station coverage area of target and can work normally, and usual second preset threshold is less than first preset threshold.

Referring to Figure 10, it is a kind of structural schematic diagram of user equipment provided in an embodiment of the present invention.The user equipment 30 is including connection unit 301, measuring unit 302 and uses unit 303.

Connection unit 301, for establishing and the connection between macro base station and the small base station of target associated with the macro base station when receiving the dual link instruction of load balancing apparatus transmission.

Optionally, user equipment (UE) 30 can receive the instruction that load balancing apparatus is sent during mobile or static.It should be noted that, user equipment 30 in the embodiment of the present invention is configured with same frequency carrier wave set, when user equipment is in frequency dual link region, the dual link that can be sent according to the load balancing apparatus instructs while being connected to macro base station and the small base station of target associated with the macro base station.When the UE30 receives the dual link instruction that the load balancing apparatus is sent, show that the UE30 is located at in frequency dual link region at this time, the connection unit 301 just instructs the connection established between the small base station of the target while establishing and connecting between the macro base station according to the dual link, so that the UE can be connected to the macro base station and the small base station of the target simultaneously.In the prior art, user equipment typically sets up the connection between the macro base station, if the small base station of the target need to be connected to, then disconnect the connection between the macro base station, it is connected to the small base station of the target, the interference signal of the macro base station will be made to influence the useful signal of the small base station of the target in this way, to influence the normal communication of user equipment.Wherein, the same frequency dual link region is to be extended to the coverage area of the small base station of the target, including the first extended area and the second extended area correspond respectively to the region C in Fig. 1 and the region D.

Measuring unit 302, for measuring the signal strength of the small base station of the target, and by the mesh of measurement The signal strength for marking small base station feeds back to the load balancing apparatus, so that the load balancing apparatus determines the location information of this equipment and distributes serving BS according to the positional information for this equipment.

Optionally, the measuring unit 302 measures the signal strength of the small base station of the target, and the signal strength of the small base station of the target of measurement is fed back into the load balancing apparatus, so that the load balancing apparatus determines the location information of the UE30 and distributes serving BS according to the positional information for the UE30.Wherein, the serving BS may be the small base station of the target, it is also possible to the small base station of target and the macro base station, depending on the location information of the UE30.At this time, the load balancing apparatus only determines that the UE30 is in the same frequency dual link region, but the region C or the region D that the UE is located in Fig. 1 are not known, therefore the load balancing apparatus needs the signal strength of the small base station of the target measured according to the measuring unit 302 to determine the more specific location information of the UE.

Using unit 303, the location information determined for obtaining the load balancing apparatus, and the serving BS distributed using the load balancing apparatus.

Optionally, described that the location information that the load balancing apparatus determines, and the serving BS distributed using the load balancing apparatus are obtained using unit 303.Specifically, when the UE30 is located at first extended area, that is the region C in Fig. 1, the serving BS is the small base station of the target, the control channel provided using unit 303 using the small base station of the target described at this time, and receive the uplink service and downlink business of the small base station scheduling of the target；When the UE is located at second extended area, that is the region D in Fig. 1, the serving BS is the macro base station and the small base station of the target, the control channel provided using unit 303 using the macro base station, receive the downlink business of the macro base station scheduling, the uplink service of the small base station scheduling of target.

Referring to Figure 11, it is the structural schematic diagram of another load balancing apparatus provided in an embodiment of the present invention.Preferably, the load balancing apparatus is deployed in the macro base station in heterogeneous network, is a software of macro base station Module.As shown in figure 11, which includes: at least one processor 1001, such as CPU, input equipment 1003, output equipment 1004, memory 1005, at least one communication bus 1002.Wherein, communication bus 1002 is for realizing the connection communication between these components.Wherein, memory 1005 can be high speed RAM memory, be also possible to non-labile memory (non-volatile memory), for example, at least a magnetic disk storage.Wherein processor 1001 can combine load balancing apparatus described in Fig. 6-Fig. 9, batch processing code be stored in memory 1005, and processor 1001 calls the program code stored in memory 1005, for performing the following operations:

When user equipment (UE) is in frequency dual link region, output equipment 1004 sends dual link instruction to the UE, the dual link instruction is used to indicate the UE while being connected to macro base station and the small base station of target associated with the macro base station, and the same frequency dual link region is the extended area being extended to the overlay area of the small base station of the target；

The location information of the UE is determined according to the signal strength of the small base station of the target of UE measurement, and output equipment 1004 distributes serving BS according to the positional information for the UE.

In an alternate embodiment of the invention, the program code stored in the calling of processor 1001 memory 1005 is executed when user equipment (UE) is in frequency dual link region, before Xiang Suoshu UE sends dual link instruction, also executes following steps:

When knowing that user equipment (UE) is connected to the macro base station, control input equipment 1003 obtains the signal strength of the small base station of the target of the UE measurement；

In an alternate embodiment of the invention, when processor 1001 calls the program code stored in memory 1005 execution to be extended the overlay area of the small base station of target associated with macro base station, following steps are specifically executed:

Control the signal strength that input equipment 1003 counts the small base station of target associated with the macro base station of all user equipment measurements in the overlay area of macro base station；

In an alternate embodiment of the invention, when the signal strength for the small base station of the target that processor 1001 calls the program code stored in memory 1005 execution to measure according to the UE judges whether the UE is in same frequency dual link region, following steps are specifically executed:

In an alternate embodiment of the invention, processor 1001 calls the program code stored in memory 1005 to execute to the UE and sends dual link instruction, specifically executes following steps:

It controls the output equipment 1004 and sends dual link instruction to the same frequency carrier wave set of the UE, the dual link instruction is used to indicate the UE while being connected to the macro base station and the small base station of the target, and it is connected to main connection by be connected to the macro base station, be connected to the small base station of the target is connected to auxiliary connection.

In an alternate embodiment of the invention, when the signal strength for the small base station of the target that processor 1001 calls the program code stored in memory 1005 execution to be measured according to the UE determines the location information of the UE, and serving BS is distributed for the UE according to the positional information, specifically execute following steps:

In an alternate embodiment of the invention, when processor 1001 calls the program code stored in memory 1005 execution to distribute the small base station of target as serving BS for the UE, following steps are specifically executed:

It controls the output equipment 1004 and controls the small base station of the target and provide control channel for the UE；

It controls the output equipment 1004 and controls uplink service and downlink business that the UE is dispatched in the small base station of the target.

In an alternate embodiment of the invention, when processor 1001 calls the program code stored in memory 1005 execution to distribute the macro base station and the small base station of the target as serving BS for the UE, following steps are specifically executed:

It controls the output equipment 1004 and controls the macro base station and provide control channel for the UE；

It controls the output equipment 1004 and controls the downlink business that the macro base station dispatches the UE, control the uplink service that the UE is dispatched in the small base station of the target.

In an alternate embodiment of the invention, it is that the UE is distributed after serving BS that processor 1001 calls the program code stored in memory 1005 to execute according to the positional information, also execution following steps:

Control the load capacity that the input equipment 1003 monitors the macro base station and the small base station of the target；

When the load capacity of the macro base station is higher than the load capacity of the first preset threshold or the small base station of the target higher than the second preset threshold, controls the output equipment 1004 and distribute serving BS again for the UE.

The embodiment of the present invention also provides a kind of SiteServer LBS, and the SiteServer LBS includes macro base station in heterogeneous network, the small base station of target and load balancing apparatus and user equipment in the embodiment of the present invention.

Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, it is that relevant hardware can be instructed to complete by computer program, the program can be stored in a computer-readable storage medium, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic disk, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access Memory, RAM) etc..

The above disclosure is only the preferred embodiments of the present invention, and of course, the scope of rights of the present invention cannot be limited by this, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.

Claims

PCT domestic application, the claims have been published.