WO2017020192A1 - Procédé et dispositif d'équilibrage de charge - Google Patents

Procédé et dispositif d'équilibrage de charge Download PDF

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Publication number
WO2017020192A1
WO2017020192A1 PCT/CN2015/085777 CN2015085777W WO2017020192A1 WO 2017020192 A1 WO2017020192 A1 WO 2017020192A1 CN 2015085777 W CN2015085777 W CN 2015085777W WO 2017020192 A1 WO2017020192 A1 WO 2017020192A1
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WIPO (PCT)
Prior art keywords
base station
small base
target small
area
signal strength
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PCT/CN2015/085777
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English (en)
Chinese (zh)
Inventor
黄黎
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/085777 priority Critical patent/WO2017020192A1/fr
Priority to CN201580081362.0A priority patent/CN107710816B/zh
Publication of WO2017020192A1 publication Critical patent/WO2017020192A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/086—Load balancing or load distribution among access entities
    • H04W28/0861—Load balancing or load distribution among access entities between base stations
    • H04W28/0864—Load balancing or load distribution among access entities between base stations of different hierarchy levels, e.g. Master Evolved Node B [MeNB] or Secondary Evolved node B [SeNB]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of mobile communications technologies, and in particular, to a load balancing method and apparatus.
  • LTE Long Term Evolution
  • HetNet Heterogeneous Network
  • the HetNet network increases the network capacity and coverage.
  • the small base station due to the large transmit power of the macro base station and the high installation location, the small base station has small transmit power and short installation position, so that the number of user equipments in the coverage of the small base station is much smaller than that of the macro base station.
  • the base station is in an idle and low-load state for a longer period of time, resulting in unbalanced load between the macro base station and the small base station, and lower utilization of the small base station.
  • the 3rd Generation Partnership Project (3GPP) organization introduced Cell Range Expansion (CRE) technology.
  • CRE Cell Range Expansion
  • the CRE technology is used to appropriately extend the coverage area of the small base station to obtain an extended area, and then the user equipment originally connected to the macro base station in the extended area switches the user from the macro base station to the small base station through a handover procedure, thereby making the macro base station and the small base station small.
  • the number of users serving on the base station is more balanced, and the utilization rate of the small base station is improved.
  • the CRE technology has the following disadvantages: first, there is an overhead in the handover procedure and the user equipment throughput in the extension area is affected during the handover process; second, the user equipment of the handover base station in the extension area, The farther away from the small base station and the user equipment close to the macro base station, the stronger the interference signal and the weaker the useful signal.
  • the user equipment exceeds a certain distance from the small base station, an abnormal situation that the interference signal is stronger than the useful signal may occur, thereby causing the extension.
  • the wireless transmission performance of the user equipment in the area is very poor, even unable to work.
  • the limit of the extended area is reached.
  • the CRE technology reaches the limit of the extended area, the extended area is still insufficient.
  • the number of user equipments that can be included is still small. Although the load imbalance of the macro base station and the small base station is improved, the imbalance is still serious. Third, when the user equipment in the extended area is switched to the small base station, The connection between the macro base station and the macro base station is interrupted, so that the dynamic adjustment of the load between the macro base station and the small base station is costly and inflexible.
  • the embodiment of the invention provides a load balancing method and device, which can flexibly and quickly adjust the load in the heterogeneous network, balance the load in the heterogeneous network, and improve the utilization of the small base station.
  • a first aspect of the embodiments of the present invention provides a load balancing method, including:
  • the same-frequency dual-connection area is an extended area obtained by expanding a coverage area of the target small base station;
  • the method before the step of sending the dual connectivity command to the UE when the user equipment UE is in the same-frequency dual-connection area, the method further includes:
  • the target small base station And extending a coverage area of the target small base station associated with the macro base station, so that the extended coverage area of the target small base station includes an original coverage area and an intra-frequency dual connection area, where the original coverage area boundary line
  • the signal strength of the target small base station is equal to the signal strength of the macro base station, and the signal strength of the target small base station in the same-frequency dual-connection area is greater than a preset threshold;
  • the same-frequency dual-connection area includes a first extended area and a second extended area, where the first extended area is an area close to an original coverage area of the target small base station, and the second extended area is far from the An area of the original coverage area of the target small base station, where a bias parameter of the signal strength of the target small base station in the first extended area is greater than that of the target small base station in the second extended area Offset parameters for signal strength.
  • the coverage area of the target small base station associated with the macro base station is expanded, include:
  • the coverage area of the target small base station associated with the macro base station is expanded. Before the steps, it also includes:
  • the small base station is determined as a target small base station associated with the macro base station.
  • the target that is measured according to the UE determines whether the UE is in the same-frequency dual-connection area, including:
  • the intra-frequency carrier group includes an intra-frequency primary cell and an intra-frequency secondary cell, where the same-frequency primary cell is The macro base station, the same-frequency secondary cell is the target small base station;
  • the dual connectivity instruction is used to indicate that the UE is simultaneously connected to the macro base station and the target small base station, and to connect to the macro base station Connected as the primary connection, the connection to the target small base station acts as a secondary connection.
  • the target that is measured according to the UE The signal strength of the small base station determines location information of the UE, and allocates a serving base station to the UE according to the location information, including:
  • the target small base station is allocated to the UE as a serving base station ,include:
  • the small base station includes:
  • the method further includes:
  • the serving base station is re-allocated to the UE.
  • a second aspect of the embodiments of the present invention provides another load balancing method, including:
  • the device allocates a serving base station
  • the location information includes a first extended area or a second extended area
  • the serving base station allocated by using the load balancing device includes:
  • the downlink service scheduled by the macro base station and the uplink service scheduled by the target small base station are received by using a control channel provided by the macro base station.
  • a third aspect of the embodiments of the present invention provides a load balancing apparatus, including:
  • An instruction sending unit configured to send, when the user equipment UE is in the same-frequency dual-connection area, a dual-connection instruction, where the dual-connection instruction is used to indicate that the UE is simultaneously connected to the macro base station and is related to the macro base station a target small base station, where the same-frequency dual-connection area is an extended area obtained by expanding a coverage area of the target small base station;
  • a base station allocation unit configured to determine location information of the UE according to the signal strength of the target small base station measured by the UE, and allocate a serving base station to the UE according to the location information.
  • the method further includes:
  • a region extension unit configured to extend a coverage area of the target small base station associated with the macro base station, so that the extended coverage area of the target small base station includes an original coverage area and an intra-frequency dual connection area, where the original coverage
  • the signal strength of the target small base station on the regional boundary line is equal to the signal strength of the macro base station, and the signal strength of the target small base station in the same frequency dual connection area is greater than a preset threshold;
  • an intensity acquiring unit configured to acquire, when the user equipment UE is connected to the macro base station, The signal strength of the target small base station measured by the UE;
  • An area determining unit configured to determine, according to a signal strength of the target small base station measured by the UE, whether the UE is in an intra-frequency dual connectivity area;
  • the same-frequency dual-connection area includes a first extended area and a second extended area, where the first extended area is an area close to an original coverage area of the target small base station, and the second extended area is far from the An area of the original coverage area of the target small base station, the offset parameter of the signal strength of the target small base station in the first extended area is greater than the offset of the signal strength of the target small base station in the second extended area parameter.
  • the area expansion unit is specifically configured to be used in the coverage area of the macro base station.
  • the signal strength of the target small base station measured by all the user equipments, and the coverage area of the target small base station is expanded according to the signal strength of the target small base station measured by the all user equipments.
  • the area determining unit includes:
  • a first determining unit configured to determine whether a signal strength of the target small base station measured by the UE is greater than the preset threshold
  • a second determining unit configured to determine, when the result of the determining by the first determining unit is YES, whether the signal strength of the target small base station measured by the UE is smaller than a boundary line of an original coverage area of the target small base station Signal strength
  • the relationship determining unit is configured to determine that the UE is in the same-frequency dual-connection area when the result of the second determining unit determines yes.
  • the instruction sending unit includes:
  • the same-frequency configuration unit is configured to configure a same-frequency carrier group for the user equipment in the same-frequency dual-connection area according to the carrier that is sent by the macro-base station, where the same-frequency carrier group includes the same-frequency primary cell and the same-frequency secondary cell.
  • the intra-frequency primary cell is the macro base station, and the same-frequency secondary cell is the target small base station;
  • connection indication unit configured to send a dual connectivity instruction to the same frequency carrier group of the UE, where the dual connectivity instruction is used to indicate that the UE is simultaneously connected to the macro base station and the target small base station, and The connection to the macro base station is used as a primary connection, and the connection to the target small base station is used as a secondary connection.
  • the base station allocation unit includes:
  • a parameter obtaining unit configured to acquire an offset parameter of a signal strength of the target small base station measured by the UE
  • a first allocation unit configured to determine that the UE is located in the first extension when the obtained offset parameter is the same as an offset parameter of a signal strength of the target small base station in the first extended area And allocating, by the UE, the target small base station as a serving base station;
  • a second allocation unit configured to determine that the UE is located in the second extension when the obtained offset parameter is the same as an offset parameter of a signal strength of the target small base station in the second extended area Within the area, the macro base station and the target small base station are allocated to the UE as a serving base station.
  • the first allocation unit includes:
  • a first control unit configured to control the target small base station to provide a control channel for the UE
  • a second control unit configured to control the target small base station to schedule an uplink service and a downlink service of the UE.
  • the second allocation unit includes:
  • a third control unit configured to control the macro base station to provide a control channel for the UE
  • a fourth control unit configured to control the macro base station to schedule downlink services of the UE, and control the target small base station to schedule uplink services of the UE.
  • the method further includes:
  • a load monitoring unit configured to monitor a load of the macro base station and the target small base station
  • a reallocation unit configured to re-allocate the serving base station to the UE when the load of the macro base station is higher than a first preset threshold or the load of the target small base station is higher than a second preset threshold.
  • a fourth aspect of the embodiments of the present invention provides a user equipment, including:
  • a connecting unit configured to establish a connection with the macro base station and the target small base station associated with the macro base station when receiving the dual connectivity command sent by the load balancing device;
  • a measuring unit configured to measure a signal strength of the target small base station, and feed back the measured signal strength of the target small base station to the load balancing device, so that the load balancing device determines location information of the device and according to The location information is a service base station allocated to the device;
  • a usage unit configured to acquire location information determined by the load balancing device, and use the serving base station allocated by the load balancing device.
  • the location information includes a first extended area or a second extended area
  • the used unit is specifically configured to: when the UE is located in the first extended And receiving, by the control channel provided by the target small base station, an uplink service and a downlink service scheduled by the target small base station; and when the UE is located in the second extended area, using a control channel provided by the macro base station And receiving, by the macro base station, a downlink service, and an uplink service scheduled by the target small base station.
  • the dual-connection instruction is sent to the UE, where the dual-connection instruction is used to indicate that the UE is simultaneously connected to the macro base station and the macro base.
  • a target small base station associated with the station the same-frequency dual-connection area is an extended area obtained by expanding a coverage area of the target small base station, and then determining the signal strength according to the signal strength of the target small base station measured by the UE.
  • FIG. 1 is a network layout diagram of a load balancing method according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a load balancing method according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of another load balancing method according to an embodiment of the present invention.
  • step S204 is a schematic flowchart of the implementation of step S204 in the embodiment shown in FIG. 3;
  • FIG. 5 is a schematic flowchart of still another load balancing method according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a load balancing apparatus according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of an instruction sending unit provided in the embodiment shown in FIG. 6; FIG.
  • FIG. 8 is a schematic structural diagram of a base station allocation unit according to the embodiment shown in FIG. 6; FIG.
  • FIG. 9 is a schematic structural diagram of another load balancing apparatus according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of still another load balancing apparatus according to an embodiment of the present invention.
  • the embodiment of the present invention provides a load balancing method and device, which can be applied to a load adjustment scenario in a heterogeneous network. For example, when the load balancing device determines that the user equipment UE is in the same-frequency dual-connection region, the method is applied to the UE.
  • the dual connectivity command is used to indicate that the UE is simultaneously connected to a macro base station and a target small base station associated with the macro base station, where the same frequency dual connectivity area is an coverage of the target small base station
  • the area is extended to obtain an extended area, and then the load balancing device determines location information of the UE according to the signal strength of the target small base station measured by the UE, and allocates a serving base station to the UE according to the location information.
  • the embodiments of the present invention can fully utilize the resources of the macro base station and the small base station in the heterogeneous network to flexibly and quickly adjust the load in the heterogeneous network, so that the load in the heterogeneous network reaches an equilibrium state, and the small base station is improved. Utilization rate.
  • the load balancing device in the embodiment of the present invention may be deployed at a certain location between the macro base station and the small base station, so that the load balancing device can adjust the load in the heterogeneous network.
  • the load balancing device may also be deployed in a macro base station of a heterogeneous network, and the macro base station allocates a serving base station for the user equipment in the coverage area to balance the load in the heterogeneous network.
  • the load balancing device may be deployed in a small base station of the heterogeneous network, and the small base station is allocated to the user equipment in the coverage area of the associated macro base station to allocate the serving base station, so that the load in the heterogeneous network reaches an equilibrium state.
  • the load balancing device is preferably deployed in a macro base station of the heterogeneous network.
  • the user equipment in the embodiment of the present invention may include, but is not limited to, a mobile phone, a PAD (tablet computer), A mobile terminal having a mobile communication function such as an intelligent wearable device. It should be noted that the user equipment in the embodiment of the present invention needs to configure a co-frequency carrier to implement a dual connectivity function, so that user equipments in the same-frequency dual-connection area can be simultaneously connected to the macro base station and associated with the macro base station. On the small base station.
  • FIG. 1 is a network layout diagram of a load balancing method according to an embodiment of the present invention.
  • the figure includes a macro base station, a small base station, an area A, an area B, an area C, and an area D.
  • the network layout diagram shown in FIG. 1 is a part of a heterogeneous network, and the heterogeneous network includes at least one macro base station and at least one small base station, wherein each macro base station in at least one macro base station The coverage area includes at least one small base station.
  • the coverage area of the small base station is much smaller than the coverage area of the macro base station, and the small base station is located in the coverage area of the associated macro base station, but the user equipment in the coverage area of the small base station is usually controlled by the small base station and is not controlled by the macro base station.
  • the small base station may include, but is not limited to, a base station with a small coverage area such as a micro base station, a pico base station, a home base station, and an enterprise base station.
  • the B area in FIG. 1 is the original coverage area of the small base station
  • the C area and the D area are the extended area of the small base station
  • the C area is close to the small base station
  • the D area is outside the C area
  • the A area is the small base station extension.
  • the area covered by the macro base station, and the A area is far from the small base station.
  • the macro base station and the small base station in the heterogeneous network both transmit signals or data in the form of carriers, so that the coverage areas of the macro base station and the small base station can be ideally regarded as a circular or elliptical shape, but in practical applications, The presence of high buildings may affect the signal strength of macro base stations and small base stations.
  • the signal strength of the small base station is equal to the signal strength of the macro base station.
  • the user equipment in the area C and the area D can detect the signal strength of the small base station, but the signal strength of the small base station detected by the user equipment in the B area is weak, and the user equipment in the area A may not detect. The signal strength of the small base station.
  • the area other than the B area belongs to the coverage area of the macro base station.
  • the extended area of the small base station corresponds to the C area in the figure, and as the coverage of the small base station expands, it is farther and farther away from the small base station, and is closer to the macro base station, and the C area
  • the wireless transmission performance of the user equipment in the user equipment becomes very poor, so that the extended area of the small base station is limited and cannot be extended, resulting in the coverage of the small base station is still too small, and can be included.
  • User equipment is still few, although the macro base station and small base station load imbalance is improved, but the load imbalance is still serious.
  • the embodiment of the present invention further expands the extended area of the small base station, so that the extended area of the small base station includes the C area and the D area, and the user equipments in the two areas can simultaneously connect to the macro base station and With this small base station, wireless transmission performance will not be affected.
  • the specific range of the C area and the D area is determined by the small base station signal strength offset parameter that is sent by the operator that manages the macro base station and the small base station.
  • the offset parameter is a reference of the small base station.
  • RSRP Reference Signal Received Power
  • the offset parameter of the C area is -10 dB
  • the offset parameter of the D area is -20 dB, indicating that the RSRP of the small base station continues to expand outward by -10 dB and -20 dB from the boundary line of the B area, that is, in the C area.
  • the RSRP is 10 dB smaller than the B region
  • the RSRP in the D region is 20 dB smaller than the B region.
  • the signal strength of the small base station is different from the signal strength offset parameter of the small base station, and the signal strength of the small base station detected by the user equipment in the C area may be different, but the signal strength of the small base station in the area is offset.
  • the parameters are the same.
  • FIG. 2 is a schematic flowchart of a load balancing method according to an embodiment of the present invention.
  • the method may include step S101 and step S102.
  • the load balancing apparatus sends a dual-connection instruction to the UE, where the dual-connection instruction is used to indicate that the UE is simultaneously connected to the macro base station and the macro base station
  • the associated target small base station is an extended area obtained by expanding a coverage area of the target small base station.
  • the load balancing device configures a co-frequency carrier group for the user equipment in the same-frequency dual-connection area according to the carrier sent by the macro base station, and when the UE is located in the same-frequency dual-connection area, the load balancing device And transmitting a dual connectivity instruction to the intra-frequency carrier group of the UE, indicating that the UE is simultaneously connected to the macro base station and the target small base station.
  • the user equipment in the same-frequency dual-connection area is simultaneously connected to the macro base station and the target small base station according to the dual-connection instruction sent by the load balancing device. It can be understood that the same-frequency carrier group is configured.
  • the user equipment uses the carrier transmitted by the macro base station to connect to the macro base station and the target small base station at the same time, so that the interference signal of the macro base station in the prior art can affect the useful signal of the target small base station. .
  • the intra-frequency dual-connection area is regarded as an intra-frequency cell
  • the user equipment in the same-frequency cell can be simultaneously connected to the macro base station and the target small base station
  • the macro base station is used as the The primary cell in the same-frequency cell
  • the target small-cell base station is the secondary cell of the same-frequency cell
  • the connection connected to the macro base station is the primary connection
  • the connection connected to the target small base station is the secondary connection.
  • the dual connectivity command uses the 3rd Generation Partnership Project (3GPP) to organize an existing carrier aggregation command, that is, the carrier aggregation existing command is also applied to the load balancing device.
  • 3GPP 3rd Generation Partnership Project
  • the target small base station is a small base station in a coverage area of the macro base station.
  • the small base station included in the coverage area of the macro base station is used as a small base station associated with the macro base station, due to coverage of the macro base station
  • An area may include more than one small base station.
  • the embodiment of the present invention selects one of the small base stations in the coverage area of the macro base station as the target small base station, and the multiple small base stations may be used according to the present disclosure.
  • the embodiments of the invention are analogous.
  • the load balancing device Before the load balancing device sends the dual connectivity command, it is required to determine whether the UE is in the same frequency dual connectivity region.
  • the UE may measure the signal strength of the target small base station at any time during the mobile process or the stationary state, and may also measure the signal strength of the macro base station. Since the target small base station is also included in the coverage of the macro base station, and the coverage of the macro base station is large, determining the accuracy of the UE location according to the signal strength of the macro base station is low, so
  • the load balancing apparatus in the embodiment of the invention determines, according to the signal strength of the target small base station measured by the UE, which area in the FIG. 1 the UE belongs to.
  • the signal strength of the target small base station measured by the UE is relatively weak, and may be a value of zero; when the UE belongs to the C area or the D area, the UE measures The signal strength of the target small base station is stronger than the A area, and is greater than a preset threshold.
  • the preset threshold is the signal strength of the target small base station measured by the user equipment on the boundary line of the D area, and the specific value is determined by the load.
  • the network administrator of the equalization device sets, and the signal strength of the target small base station is smaller than the signal strength of the macro base station; when the UE belongs to the B area, the signal strength of the target small base station measured by the UE is greater than Or equal to the signal strength of the macro base station.
  • the same-frequency dual-connection area corresponds to the C area and the D area in FIG. 1 and is an extended area of the target small base station.
  • the UE can measure the target in the same frequency double connection area
  • the signal strength of the small base station can be measured, and the signal strength of the macro base station is generally higher than the signal strength of the target small base station in the same frequency double connection area, but If the user equipment in the same-frequency dual-connection area is connected to the macro base station and uses resources on the macro base station, the macro-base station may be in the same-frequency dual-connection area.
  • the bandwidth of each user equipment is small, which is not conducive to the transmission of data, and the target small base station may be in an idle state, which not only causes the overload of the macro base station, but also affects users in the same-frequency dual-connection area.
  • the user equipment in the same-frequency dual-connection area in the embodiment of the present invention may be connected to the macro base station or to the target small base station, and the load balancing device is configured according to the specificity of the user equipment.
  • the location for the user equipment to allocate the macro base station and/or the target small base station as the serving base station does not burden the load of the macro base station nor affect the user experience.
  • an area covered by a macro base station can be regarded as a cell, and the macro base station provides services such as voice and data to user equipments in the cell in the form of carriers, and user equipments in the cell use carriers with the same carrier frequency, and This carrier is usually only present in the cell. Even if there is at least one small base station in the macro base station, the carrier frequency used by the user equipment in the coverage area of the small base station is equal to the carrier frequency transmitted by the macro base station. The carrier frequencies used by neighboring cells are different.
  • the load balancing device configures a same-frequency carrier group for the user equipment in the same-frequency dual-connection area, that is, the load balancing apparatus uses a convergence technology similar to Carrier Aggregation (CA).
  • CA Carrier Aggregation
  • CA technology introduces a technology to increase the transmission bandwidth introduced by the LTE system to meet the requirements of single-user peak rate and system capacity increase.
  • the CA technology can aggregate 2 to 5 LTE component carriers (CCs) to achieve a maximum transmission bandwidth of 100 MHz, which effectively increases the uplink and downlink transmission rates.
  • CCs component carriers
  • the carrier frequencies of component carriers are different in CA technology.
  • each user equipment uses a separate Hybrid Automatic Repeat Request (HARQ) entity on each carrier, and each transport block can only be mapped to a specific carrier.
  • the physical downlink control channel (PDCCH) of each carrier is independent of each other, and the PDCCH of each carrier is a physical downlink shared channel (PDSCH) and a physical uplink shared channel (Physical) of each carrier.
  • PDSCH physical downlink shared channel
  • Physical Physical uplink shared channel
  • Uplink Shared Channel, PUSCH Uplink Shared Channel
  • the PDCCH channel schedules uplink and downlink resource allocation of multiple carriers, thereby achieving high-speed transmission.
  • the aggregation technology in the embodiment of the present invention is different from the CA technology in that the CA technology aggregates carriers of two or more different frequencies, so that the user equipment obtains a large bandwidth, and the aggregation technology in the embodiment of the present invention utilizes One carrier transmitted by the macro base station is simultaneously connected to the macro base station and the target small base station.
  • the macro base station and/or the target small base station can be used to provide scheduling services for user equipments in the same-frequency dual-connection area by using the aggregation technology in the embodiment of the present invention.
  • S102 Determine location information of the UE according to the signal strength of the target small base station measured by the UE, and allocate a serving base station to the UE according to the location information.
  • the load balancing device determines location information of the UE according to the signal strength of the target small base station measured by the UE. Since the intra-frequency dual connectivity region includes the C region and the D region in FIG. 1, it is not clear whether the UE is in the C region or the D region, and the load balancing device is for users in the C region and the D region. The device processing manner is different, so the load balancing device needs to first determine the location information of the UE.
  • the load balancing device acquires an offset parameter of the signal strength of the target small base station measured by the UE according to the signal strength of the target small base station measured by the UE, and determines the measured location of the UE
  • the offset parameter of the signal strength of the target small base station is the same as the offset parameter of the C area or the offset parameter of the D area. Determining that the UE is located in the C region when the offset parameter of the signal strength of the target small base station measured by the UE is the same as the offset parameter of the C region; and the signal of the target small base station measured by the UE When the offset parameter of the strength is the same as the offset parameter of the D region, it is determined that the UE is located in the D region.
  • the load balancing device allocates a serving base station to the UE according to the location information.
  • the cellular communication system is to transmit different types of information, including service information and various control information, and thus arrange corresponding logical channels on the physical channel. Some of these logical channels are used for the call connection phase, some for communication, and some for the entire time of system operation. Logical channels are divided into two major categories: traffic channels and control channels. The control channel is used to transmit signaling information and channels of short packet data.
  • the UE uses the control channel provided by the target small base station because it is close to the target small base station; when the UE is located in the D area, compared to the macro base The station is far from the target small base station, so the UE uses the control channel provided by the macro base station.
  • the uplink scheduling and the downlink scheduling of the user equipment in the same-frequency dual-connection area can be performed independently according to the CA technology, because the user equipment in the same-frequency dual-connection area is connected to the macro base station and the target small base station at the same time. , not tied together.
  • the uplink and downlink services of the UE are small by the target due to the low load and low utilization of the target small base station.
  • the base station provides scheduling services.
  • the UE is located in the D area, the distance from the target small base station is relatively far from the macro base station, and the bandwidth and network speed requirements of the downlink service are generally higher than the downlink service bandwidth for the user equipment.
  • the network speed requirement is that the bandwidth of the macro base station is greater than the bandwidth of the small base station, so that the downlink service of the UE is provided by the macro base station, and the uplink service of the UE is provided by the target small base station.
  • the service can not only ensure the bandwidth requirement of the user equipment, but also balance the load in the heterogeneous network, and can also avoid the influence of the interference signal of the macro base station on the useful signal of the small base station.
  • the dual-connection instruction is sent to the UE, where the dual-connection instruction is used to indicate that the UE is simultaneously connected to the macro base station and the macro base.
  • a target small base station associated with the station the same-frequency dual-connection area is an extended area obtained by expanding a coverage area of the target small base station, and then determining the signal strength according to the signal strength of the target small base station measured by the UE.
  • FIG. 3 is a schematic flowchart diagram of another load balancing method according to an embodiment of the present invention, where the method includes steps S201 to S215.
  • the load balancing device collects a signal strength of a target small base station that is measured by the user equipment in the coverage area of the macro base station and is associated with the macro base station.
  • the load balancing device needs to first determine a coverage area of a macro base station in the heterogeneous network.
  • the macro base station covers a circle with a radius of 10 km, and detects a coverage area of the macro base station. Whether there is a small base station inside.
  • the embodiment of the present invention selects one macro base station from at least one macro base station for introduction.
  • the small base station in the coverage area of the macro base station is used as the target small base station associated with the macro base station.
  • the macro base station may have more than one small base station in the coverage area.
  • the embodiment of the present invention selects one of the small base stations in the coverage area of the macro base station as the target small base station, and there are many The case of associated small base stations can be analogized according to an embodiment of the present invention.
  • the load balancing device counts the coverage area of the macro base station except the target small base station.
  • the signal strength of the target small base station measured by all user equipments in the area outside the original coverage area, that is, the signal strength of the target small base station measured by all user equipments in the A area, the C area, and the D area in FIG.
  • the coverage area of the target small base station is extended according to the signal strength of the target small base station measured by the user equipment, so that the extended coverage area of the target small base station includes an original coverage area and an intra-frequency coverage. Double connection area.
  • the load balancing device acquires an original coverage area of the target small base station, where the original coverage area of the target small base station corresponds to the B area in FIG. 1 .
  • the signal strength of the target small base station measured by the user equipment in the original coverage area of the target small base station is higher than the signal strength of the macro base station, and on the boundary line of the original coverage area of the target small base station, The signal strength of the target small base station is equal to the signal strength of the macro base station.
  • the load balancing device expands a coverage area of the target small base station according to the limit number strength of the target small base station measured by the user equipment, so that some coverage of the macro base station is
  • the user equipment in the area can also use the information provided by the target small base station, thereby improving the utilization of the target small base station.
  • An extension area is located next to a boundary line of the original coverage area of the target small base station, outside the original coverage area of the target small base station, and the signal of the target small base station measured by the user equipment in the extended area
  • the strength is greater than a preset threshold, where the preset threshold is the signal strength of the target small base station measured by the user equipment on the boundary line of the D area, and the specific value is set by the network administrator of the load balancing device.
  • the target small base station is extended by using the CRE technology, but the area where the CRE technology is used for expansion is limited, and the embodiment of the present invention can extend the coverage area of the small base station to receive the target small.
  • the area of the base station signal maximizes the coverage area of the target small base station.
  • the load balancing device determines the extended area as an intra-frequency dual-connection area, where the same-frequency dual-connection area includes a first extended area and a second extended area.
  • the first extended area is an area close to the original coverage area, and corresponds to the C area in FIG.
  • the second extended area is an area away from the original coverage area, corresponding to the D area in FIG.
  • the offset parameter of the signal strength of the target small base station in the first extended area is greater than the offset parameter of the signal strength of the target small base station in the second extended area.
  • the offset parameter of the signal strength of the target small base station is a reference signal received power RSRP of the target small base station.
  • the offset parameter of the configuration C area is -10 dB
  • the offset parameter of the D area is -20 dB, indicating that the RSRP of the target small base station continues to expand outward by -10 dB and -20 dB from the boundary line of the B area, that is, C
  • the RSRP in the region is reduced by 10 dB compared to the B region, and the RSRP in the D region is reduced by 20 dB from the B region.
  • the signal strength of the target small base station is different from the signal strength offset parameter of the target small base station, and the signal strength of the target small base station detected by the user equipment in the C area may be different, but the area is different.
  • the signal strength offset parameters of the target small base station are the same.
  • the load balancing device monitors the connection situation of the user equipment in the coverage area of the macro base station in real time, and when the user equipment UE is connected to the macro base station, acquires the target small base station measured by the UE.
  • the signal strength is such that the load balancing device determines which region of the Figure 1 the UE is in.
  • S204 Determine, according to the signal strength of the target small base station measured by the UE, whether the UE is in an intra-frequency dual connectivity area.
  • the load balancing device determines, according to the signal strength of the target small base station measured by the UE, whether the UE belongs to an intra-frequency dual-connection area, where the same-frequency dual-connection area is for the target small base station.
  • the extended area where the coverage area is expanded.
  • the same frequency double connection area corresponds to the C area and the D area in FIG. 1 .
  • the UE may measure the signal strength of the target small base station and the signal strength of the macro base station in the same-frequency dual-connection area, usually in the same-frequency dual-connection area.
  • the signal strength of the macro base station is higher than the signal strength of the target small base station, but if the macro base station covers a large number of user equipments, if the same frequency double connection area
  • the user equipments in the same manner are connected to the macro base station to use resources on the macro base station, which may result in a smaller bandwidth of each user equipment in the same-frequency dual-connection area, which is disadvantageous for data transmission, and the target
  • the small base station may be in an idle state, which not only causes the overload of the macro base station to be excessive, but also affects the experience of the user in the same-frequency dual-connection area.
  • the user equipment in the same-frequency dual-connection area in the embodiment of the present invention may be connected to the macro base station or to the target small base station, and the load balancing device is configured according to the specificity of the user equipment.
  • the location for the user equipment to allocate the macro base station and/or the target small base station as the serving base station does not burden the load of the macro base station nor affect the user experience.
  • step S204 refer to the process diagram shown in FIG. 4.
  • Step S204 may include steps S301-S304.
  • the load balancing device first determines whether the signal strength of the target small base station measured by the UE is greater than the preset threshold.
  • the UE can measure the signal strength of the target small base station and is greater than the preset threshold;
  • the result of the determination in step S302 is no, it can be understood that The UE measures that the signal strength of the target small base station is less than the preset threshold or the UE does not measure the signal strength of the target small base station, that is, the UE is located in the A area in FIG. 1 at this time.
  • the UE can measure the signal strength of the target small base station and is greater than the preset threshold, so the load balancing device determines the Whether the signal strength of the target small base station measured by the UE is smaller than the signal strength of the original coverage area boundary line of the target small base station, and further determining whether the UE is located in the B area in FIG. 1 or an extended area outside the B area.
  • the signal strength of the target small base station measured by the UE is smaller than the signal strength of the original coverage area boundary line of the target small base station, and determining The UE belongs to the same-frequency dual-connection area, and the same-frequency dual-connection area Corresponds to the C area and the D area in FIG.
  • the signal strength of the target small base station measured by the UE is equal to or greater than the signal strength of the original coverage area boundary line of the target small base station. Determining that the UE belongs to the original coverage area of the target small base station, and corresponds to the B area in FIG.
  • the load balancing apparatus is configured to use the carrier sent by the macro base station as the intra-frequency dual-connection area.
  • the user equipment configures the same-frequency carrier group, and sends a dual-connection instruction to the same-frequency carrier group of the UE, where the dual-connection instruction is used to indicate that the UE is simultaneously connected to the macro base station and the target small base station.
  • the intra-frequency carrier group includes an intra-frequency primary cell and an intra-frequency secondary cell, the same-frequency primary cell is the macro base station, and the same-frequency secondary cell is the target small base station.
  • the user equipment in the same-frequency dual-connection area is simultaneously connected to the macro base station and the target small base station according to the dual-connection instruction sent by the load balancing device. It can be understood that the same-frequency carrier group is configured.
  • the user equipment uses the carrier transmitted by the macro base station to connect to the macro base station and the target small base station at the same time, so that the interference signal of the macro base station in the prior art can affect the useful signal of the target small base station. .
  • the intra-frequency dual-connection area is regarded as an intra-frequency cell
  • the user equipment in the same-frequency cell can be simultaneously connected to the macro base station and the target small base station
  • the macro base station is used as the The primary cell in the same-frequency cell
  • the target small-cell base station is the secondary cell of the same-frequency cell
  • the connection connected to the macro base station is the primary connection
  • the connection connected to the target small base station is the secondary connection.
  • the dual connectivity command uses an existing command of the 3GPP organization carrier aggregation, that is, the carrier aggregation existing command is also applied to the load balancing device.
  • the load balancing device acquires an offset parameter of a signal strength of the target small base station measured by the UE, so as to determine whether the UE is a C area or a D area in FIG. 1 .
  • the load balancing device may directly detect the bias parameter and the detected bias parameter and the The offset parameters of the signal strengths of the target small base stations of the first extended area and the second extended area are compared to determine which area the UE is in.
  • the obtained offset parameter is the same as the offset parameter of the signal strength of the target small base station in the first extended area, determining that the UE is located in the first extended area, corresponding to The area C in Figure 1.
  • the target small base station is allocated to the UE as a serving base station because the target small base station is located.
  • the target small base station provides a control channel, and an uplink service and a downlink service, for the user equipment in the first extended area.
  • the obtained offset parameter is the same as the offset parameter of the signal strength of the target small base station in the second extended area, determining that the UE is located in the second extended area, corresponding to The D area in Figure 1.
  • the load balancing device allocates the macro base station and the target small base station to the UE as a serving base station.
  • the second extended area is farther away from the target small base station than the first extended area, and thus the control channel of the macro base station is provided to the UE for use.
  • the bandwidth and the network speed of the downlink service are generally higher than the bandwidth and the network speed of the downlink service.
  • the bandwidth of the macro base station is greater than the bandwidth of the small base station, and therefore the second extended area.
  • the downlink service of the UE is provided by the macro base station to provide a scheduling service
  • the uplink service of the UE is provided by the target small base station to provide a scheduling service, which can ensure the bandwidth requirement of the user equipment and balance the heterogeneous network.
  • the load can also avoid the influence of the interference signal of the macro base station on the useful signal of the small base station.
  • the TTI is usually 1 ms
  • the load balancing device in the embodiment of the present invention also schedules the macro base station and the target small base station according to the TTI in the LTE system.
  • the load balancing device needs to monitor the load of the macro base station and the target small base station in real time to flexibly allocate a serving base station to the UE.
  • the load of the macro base station may be higher than a first preset threshold or the load of the target small base station is higher than the second pre- a threshold is set, according to the mechanism that the LTE system is scheduled once per TTI, the load balancing device re-allocates the serving base station to the user equipment in the same-frequency dual-connection area to balance the load of the macro base station and the target small base station, And fully utilizing resources of the macro base station and the target small base station to improve utilization of the target small base station.
  • the first preset threshold is a maximum load that ensures that the user equipment in the coverage area of the macro base station can work normally.
  • the second preset threshold is a maximum load that ensures that the user equipment in the coverage area of the target small base station can work normally. Generally, the second preset threshold is smaller than the first preset threshold.
  • the dual-connection instruction is sent to the UE, where the dual-connection instruction is used to indicate that the UE is simultaneously connected to the macro base station and the macro base.
  • a target small base station associated with the station the same-frequency dual-connection area is an extended area obtained by expanding a coverage area of the target small base station, and then determining the signal strength according to the signal strength of the target small base station measured by the UE.
  • the utilization of the small base station is improved, and the influence of the macro base station interference signal on the useful signal of the small base station can also be avoided.
  • FIG. 5 is a schematic flowchart of still another method for load balancing according to an embodiment of the present invention, where the method includes steps S401 to S403.
  • the user equipment UE can receive the load balancing device during the mobile or stationary process.
  • the user equipment is configured with the same-frequency carrier group, and when the user equipment is in the same-frequency dual-connection area, the dual-connection command sent by the load balancing device can be simultaneously connected to the macro base station and The target small base station associated with the macro base station.
  • the UE receives the dual connectivity command sent by the load balancing device, indicating that the UE is located in the same frequency dual connectivity area, the UE is established with the macro base station according to the dual connectivity instruction.
  • the connection with the target small base station is established at the same time as the connection, so that the UE can simultaneously connect to the macro base station and the target small base station.
  • the UE usually establishes a connection with the macro base station, and if it is connected to the target small base station, disconnects the connection with the macro base station, and connects to the target small base station.
  • the interference signal of the macro base station affects the useful signal of the target small base station, thereby affecting the normal communication of the user equipment.
  • the same-frequency dual-connection area is obtained by expanding the coverage of the target small base station, and includes a first extended area and a second extended area, which respectively correspond to the C area and the D area in FIG.
  • S402. Measure a signal strength of the target small base station, and feed back the measured signal strength of the target small base station to the load balancing device, so that the load balancing device determines location information of the device and according to the location.
  • the information is assigned to the serving base station for the device.
  • the UE measures a signal strength of the target small base station, and feeds back the measured signal strength of the target small base station to the load balancing device, so that the load balancing device determines the location of the UE. And assigning a serving base station to the UE according to the location information.
  • the serving base station may be the target small base station, or may be the target small base station and the macro base station, according to the location information of the UE.
  • the load balancing device only determines that the UE is in the same-frequency dual-connection area, but it is not clear whether the UE is located in the C area or the D area in FIG. 1, and therefore the load balancing apparatus needs to be based on
  • the signal strength of the target small base station measured by the UE is used to determine specific location information of the UE.
  • the UE acquires location information determined by the load balancing device, and uses the serving base station allocated by the load balancing device. Specifically, when the UE is located in the first extended area, that is, the C area in FIG. 1, the serving base station is the target small base station, and the UE uses the control channel provided by the target small base station. And receiving the uplink service scheduled by the target small base station and Downlink service; when the UE is located in the second extended area, that is, the D area in FIG. 1, the serving base station is the macro base station and the target small base station, and the UE uses the macro base station to provide The control channel receives the downlink service scheduled by the macro base station, and the uplink service scheduled by the target small base station.
  • the load balancing device when receiving the dual connectivity command sent by the load balancing device, establishing a connection with the macro base station and the target small base station associated with the macro base station, and measuring the target small base station Signal strength, then feeding back the measured signal strength of the target small base station to the load balancing device, finally acquiring location information determined by the load balancing device, and using the serving base station allocated by the load balancing device, thereby The impact of the handover base station on the user equipment is reduced, and the utilization of the small base station is improved.
  • the load balancing device and the user equipment provided by the embodiments of the present invention are described in detail below with reference to FIG. It should be noted that the load balancing device shown in FIG. 6 to FIG. 9 and FIG. 11 is used to execute the method of the embodiment shown in FIG. 2 and FIG. 3, and the user equipment shown in FIG. 10 is used for The method of the embodiment shown in FIG. 5 of the present invention is performed. For the convenience of description, only parts related to the embodiment of the present invention are shown. Without specific details, please refer to FIG. 2, FIG. 3 and FIG. An embodiment.
  • FIG. 6 is a schematic structural diagram of a load balancing apparatus according to the present disclosure.
  • the load balancing apparatus 10 may include an instruction sending unit 101 and a base station allocating unit 102.
  • the instruction sending unit 101 is configured to send a dual connectivity instruction to the UE when the user equipment UE is in the same frequency dual connectivity area.
  • the command sending unit 101 sends a dual-connection instruction to the UE, where the dual-connection instruction is used to indicate that the UE is simultaneously connected to the macro base station and the The target small base station associated with the macro base station, wherein the same-frequency dual-connection area is an extended area obtained by expanding a coverage area of the target small base station.
  • the load balancing device 10 configures a same-frequency carrier group for the user equipment in the same-frequency dual-connection area according to the carrier sent by the macro base station, and when the UE is located in the same-frequency dual-connection area, the command sending unit 101 And transmitting a dual connectivity instruction to the intra-frequency carrier group of the UE, indicating that the UE is simultaneously connected to the macro base station and the target small base station.
  • the user equipment in the same-frequency dual-connection area is simultaneously connected to the macro base station and the target small base station according to the dual-connection instruction sent by the load balancing device, and it can be understood that the same frequency carrier is configured.
  • the user equipment of the wave group is connected to the macro base station and the target small base station by using the carrier transmitted by the macro base station, so that the interference signal of the macro base station in the prior art can be effectively prevented from affecting the target small base station.
  • the condition of the signal is not limited to the following aspects.
  • the target small base station is a small base station in a coverage area of the macro base station.
  • the small base station included in the coverage area of the macro base station is used as a small base station associated with the macro base station, due to coverage of the macro base station
  • An area may include more than one small base station.
  • the embodiment of the present invention selects one of the small base stations in the coverage area of the macro base station as the target small base station, and the multiple small base stations may be used according to the present disclosure.
  • the embodiments of the invention are analogous.
  • the load balancing apparatus 10 Before the instruction sending unit 101 sends the dual connectivity instruction, the load balancing apparatus 10 needs to determine whether the UE is in the same frequency dual connectivity area.
  • the UE may measure the signal strength of the target small base station at any time during the mobile process or the stationary state, and may also measure the signal strength of the macro base station. Since the target small base station is also included in the coverage of the macro base station, and the coverage of the macro base station is large, determining the accuracy of the UE location according to the signal strength of the macro base station is low, so
  • the load balancing apparatus 10 in the embodiment of the invention determines, according to the signal strength of the target small base station measured by the UE, which area in the FIG. 1 the UE belongs to.
  • the signal strength of the target small base station measured by the UE is relatively weak, and may be a value of zero; when the UE belongs to the C area or the D area, the UE measures The signal strength of the target small base station is stronger than the A area, and is greater than a preset threshold.
  • the preset threshold is the signal strength of the target small base station measured by the user equipment on the boundary line of the D area, and the specific value is determined by the load.
  • the network administrator of the equalization device sets, and the signal strength of the target small base station is smaller than the signal strength of the macro base station; when the UE belongs to the B area, the signal strength of the target small base station measured by the UE is greater than Or equal to the signal strength of the macro base station.
  • the same-frequency dual-connection area corresponds to the C area and the D area in FIG. 1 and is an extended area of the target small base station.
  • the UE may measure the signal strength of the target small base station and the signal strength of the macro base station in the same-frequency dual-connection area, usually in the same-frequency dual-connection area.
  • the signal strength of the macro base station is higher than the signal strength of the target small base station, but because the user equipment in the coverage area of the macro base station is large, if the user equipment in the same frequency double connection area is connected to the macro base station, The resources on the macro base station may cause the same frequency double connection area
  • the bandwidth of each user equipment in the domain is small, which is not conducive to the transmission of data, and the target small base station may be in an idle state, which not only causes the overload of the macro base station to be excessive, but also affects users in the same-frequency dual-connection area. Experience.
  • the user equipment in the same-frequency dual-connection area in the embodiment of the present invention may be connected to the macro base station or to the target small base station, and the load balancing apparatus 10 is configured according to the user equipment.
  • the specific location for the user equipment to allocate the macro base station and/or the target small base station as the serving base station does not burden the load of the macro base station nor affect the user experience.
  • the instruction transmitting unit 101 may include an intra-frequency configuration unit 1011 and a connection instructing unit 1012.
  • the same-frequency configuration unit 1011 is configured to configure a same-frequency carrier group for the user equipment in the same-frequency dual-connection area according to the carrier that is sent by the macro-base station, where the same-frequency carrier group includes the same-frequency primary cell and the same-frequency secondary cell.
  • the intra-frequency primary cell is the macro base station
  • the same-frequency secondary cell is the target small base station.
  • the intra-frequency configuration unit 1011 configures a same-frequency carrier group for the user equipment in the same-frequency dual-connection area according to the carrier sent by the macro base station, where the same-frequency carrier group includes the same-frequency primary cell and the same The frequency secondary cell, the same frequency primary cell is the macro base station, and the same frequency secondary cell is the target small base station.
  • the carrier that is sent by the macro base station is used to cover the same-frequency carrier group, that is, the same-frequency primary cell and the same-frequency secondary cell are simultaneously covered, so that the same frequency is configured.
  • the user equipment of the carrier group can be simultaneously connected to the macro base station and the target small base station.
  • an area covered by a macro base station can be regarded as a cell, and the macro base station provides services such as voice and data to user equipments in the cell in the form of carriers, and user equipments in the cell use carriers with the same carrier frequency, and This carrier is usually only present in the cell. Even if there is at least one small base station in the macro base station, the carrier frequency used by the user equipment in the coverage area of the small base station is equal to the carrier frequency transmitted by the macro base station. The carrier frequencies used by neighboring cells are different.
  • the load balancing device 10 configures a same-frequency carrier group for the user equipment in the same-frequency dual-connection area, that is, the load balancing apparatus uses the aggregation technology similar to carrier aggregation CA to the macro base.
  • the carrier transmitted in the station is processed, so that the user equipment configured with the same-frequency carrier group can be simultaneously connected to the macro base station and the target small base station.
  • CA technology introduces a technology to increase the transmission bandwidth introduced by the LTE system to meet the requirements of single-user peak rate and system capacity increase.
  • the CA technology can aggregate 2 to 5 LTE component carriers to achieve a maximum transmission bandwidth of 100 MHz, which effectively improves the uplink and downlink transmission rates.
  • the carrier of a member carrier in CA technology The wave frequencies are not the same.
  • each user equipment uses independent HARQ entities on each carrier, and each transport block can only be mapped to a specific carrier.
  • the PDCCHs above each carrier are independent of each other, and resources are allocated to the PDSCH and PUSCH channels of each carrier using the PDCCH of each carrier.
  • the carrier indication field may also be used to schedule uplink and downlink resource allocation of multiple carriers by using a PDCCH channel on one carrier, thereby achieving high-speed transmission.
  • the aggregation technology in the embodiment of the present invention is different from the CA technology in that the CA technology aggregates carriers of two or more different frequencies, so that the user equipment obtains a large bandwidth, and the aggregation technology in the embodiment of the present invention utilizes One carrier transmitted by the macro base station is simultaneously connected to the macro base station and the target small base station.
  • the macro base station and/or the target small base station can be used to provide scheduling services for user equipments in the same-frequency dual-connection area by using the aggregation technology in the embodiment of the present invention.
  • the dual connectivity command uses an existing command of the 3GPP organization carrier aggregation, that is, the carrier aggregation existing command is also applied to the load balancing device.
  • connection indication unit 1012 configured to send a dual connectivity instruction to the same frequency carrier group of the UE, where the dual connectivity instruction is used to indicate that the UE is simultaneously connected to the macro base station and the target small base station, and is connected to The connection of the macro base station serves as a primary connection, and the connection connected to the target small base station serves as a secondary connection.
  • connection indication unit 1012 sends a dual connectivity instruction to the intra-frequency carrier group of the UE, where the dual connectivity instruction is used to indicate that the UE is simultaneously connected to the macro base station and the target small base station, and the connection is to be
  • the connection to the macro base station serves as a primary connection
  • the connection to the target small base station serves as a secondary connection.
  • the user equipment in the same-frequency dual-connection area does not switch the user equipment from the macro base station to the target small base station as in the CRE technology, but simultaneously connects to the macro base station and the target. Small base station.
  • the base station allocation unit 102 is configured to determine location information of the UE according to the signal strength of the target small base station measured by the UE, and allocate a serving base station to the UE according to the location information.
  • the base station allocation unit 102 determines location information of the UE according to the signal strength of the target small base station measured by the UE. Since the intra-frequency dual connectivity region includes the C region and the D region in FIG. 1, it is not clear whether the UE is in the C region or the D region, and the load balancing device 10 is directed to the C region and the D region. The user equipments are processed differently, so the base station allocation unit 102 needs to first determine the location information of the UE. Take the C area in Figure 1 as the first An extended area, the D area serves as a second extended area. The first extended area is an area close to the original coverage area, and the second extended area is an area away from the original coverage area.
  • the offset parameter of the signal strength of the target small base station in the first extended area is greater than the offset parameter of the signal strength of the target small base station in the second extended area.
  • the base station allocation unit 102 may include a parameter acquisition unit 1021, a first allocation unit 1022, and a second allocation unit 1023.
  • the first allocating unit 1022 includes a first control unit 1122 and a second control unit 1222
  • the second allocating unit 1023 includes a third control unit 1123 and a fourth control unit 1223.
  • the parameter obtaining unit 1021 is configured to acquire an offset parameter of a signal strength of the target small base station measured by the UE.
  • the parameter obtaining unit 1021 acquires, according to the signal strength of the target small base station measured by the UE, an offset parameter of a signal strength of the target small base station measured by the UE, so as to determine whether the UE is
  • the C area in Fig. 1 is also the D area.
  • the parameter obtaining unit 1021 may directly detect the offset parameter, and offset the detected offset parameter from the signal strength of the target small base station of the first extended area and the second extended area. The parameters are compared to determine which region the UE is in.
  • the first allocating unit 1022 is configured to determine that the UE is located in the first when the obtained offset parameter is the same as the offset parameter of the signal strength of the target small base station in the first extended area. Within the extended area, the target small base station is allocated to the UE as a serving base station.
  • the first allocating unit 1022 It is determined that the UE is located in the first extended area, corresponding to the C area in FIG.
  • the first allocating unit 1022 allocates the target small base station to the UE as a serving base station, but does not disconnect the connection with the macro base station,
  • the target small base station provides a control channel and a traffic channel for the UE to improve utilization of the target small base station.
  • the first allocating unit 1022 includes a first control unit 1122 and The second control unit 1222.
  • the first control unit 1122 is configured to control the target small base station to provide a control channel for the UE.
  • the first control unit 1122 controls the target small base station to provide a control channel for the UE.
  • the second control unit 1222 is configured to control the target small base station to schedule uplink services and downlink services of the UE.
  • the second control unit 1222 controls the target small base station to schedule an uplink service and a downlink service of the UE. Since the UE is located in the first extended area and is closer to the original coverage area of the target base station, the UE can obtain better bandwidth by using the service provided by the target small base station.
  • a second allocating unit 1023 configured to determine, when the obtained offset parameter is the same as an offset parameter of a signal strength of the target small base station in the second extended area, that the UE is located in the second Within the extended area, the macro base station and the target small base station are allocated to the UE as a serving base station.
  • the second allocating unit 1023 It is determined that the UE is located in the second extended area, corresponding to the D area in FIG.
  • the second allocating unit 1023 allocates the macro base station and the target small base station to the UE as a serving base station. Since the second extended area is far from the target small base station and is closer to the macro base station, the macro base station and the target small base station are all allocated to the UE as a serving base station. At this time, the serving base station can be flexibly allocated to the UE according to the load condition of the macro base station and the target small base station.
  • the second distribution unit 1023 includes a first control unit 1123 and a second control unit 1223.
  • the third control unit 1123 is configured to control the macro base station to provide a control channel for the UE.
  • the third control unit 1123 controls the macro base station to provide a control channel for the UE, so that the CRE technology may be avoided due to the target small base station control.
  • the problem that the channel is strongly interfered by the macro base station and the extended range is limited.
  • the fourth control unit 1223 is configured to control the macro base station to schedule downlink services of the UE, and control the target small base station to schedule uplink services of the UE.
  • the fourth control unit 1223 controls the macro base station to schedule the next industry of the UE. And controlling the target small base station to schedule uplink services of the UE.
  • the bandwidth and the network speed of the downlink service are generally higher than the bandwidth and the network speed of the downlink service.
  • the bandwidth of the macro base station is greater than the bandwidth of the small base station, and therefore the second extended area.
  • the downlink service of the UE is provided by the macro base station to provide a scheduling service
  • the uplink service of the UE is provided by the target small base station to provide a scheduling service, which can ensure the bandwidth requirement of the user equipment and balance the heterogeneous network.
  • the load can also avoid the influence of the interference signal of the macro base station on the useful signal of the small base station.
  • the dual-connection instruction is sent to the UE, where the dual-connection instruction is used to indicate that the UE is simultaneously connected to the macro base station and the macro base.
  • a target small base station associated with the station the same-frequency dual-connection area is an extended area obtained by expanding a coverage area of the target small base station, and then determining the signal strength according to the signal strength of the target small base station measured by the UE.
  • FIG. 9 is a schematic structural diagram of another load balancing apparatus according to an embodiment of the present invention.
  • the load balancing apparatus 20 may include a region extending unit 201, an intensity acquiring unit 202, an area determining unit 203, and an instruction sending unit 204.
  • Base station allocation unit 205 includes a first judging unit 2031, a second judging unit 2032, and a relationship determining unit 2033.
  • the specific structure of the command sending unit 204 and the base station allocating unit 205 can be referred to the specific structures of the command sending unit 101 and the base station allocating unit 102 in the embodiment shown in FIG. 6, and details are not described herein again.
  • the area extension unit 201 is configured to expand a coverage area of the target small base station associated with the macro base station, so that the extended coverage area of the target small base station includes an original coverage area and an intra-frequency dual connection area, where the original The signal strength of the target small base station on the boundary line of the coverage area is equal to the signal strength of the macro base station, and the signal strength of the target small base station in the same frequency dual connection area is greater than a preset threshold.
  • the area extension unit 201 expands a coverage area of the target small base station associated with the macro base station, so that the extended coverage area of the target small base station includes an original coverage area and an intra-frequency dual connection area. Signal strength and location of the target small base station on the boundary line of the original coverage area The signal strength of the macro base station is equal, and the signal strength of the target small base station in the same-frequency dual-connection area is greater than a preset threshold. Specifically, the area extension unit 201 counts the signal strength of the target small base station that is measured by all the user equipments in the coverage area of the macro base station, and the target small base station is measured according to the all user equipments. The signal strength extends the coverage area of the target small base station.
  • the area extension unit 201 counts the signal strength of the target small base station associated with the macro base station measured by all user equipments in the coverage area of the macro base station. Before the area extension unit 201 performs statistics, the load balancing apparatus 20 needs to first determine a coverage area of a macro base station in the heterogeneous network. Generally, the macro base station covers a circle with a radius of 10 km, and detects the coverage of the macro base station. Whether there is a small base station in the area. In the heterogeneous network, including at least one macro base station and at least one small base station, the embodiment of the present invention selects one macro base station from at least one macro base station for introduction.
  • the small base station in the coverage area of the macro base station is used as the target small base station associated with the macro base station.
  • the macro base station may have more than one small base station in the coverage area.
  • the embodiment of the present invention selects one of the small base stations in the coverage area of the macro base station as the target small base station, and there are many The case of associated small base stations can be analogized according to an embodiment of the present invention.
  • the area extension unit 201 counts the target small base station in the coverage area of the macro base station.
  • the signal strength of the target small base station measured by all user equipments in the area outside the original coverage area, that is, the signal strength of the target small base station measured by all user equipments in the A area, the C area, and the D area in FIG. .
  • the load balancing device 20 After determining the target small base station, acquires an original coverage area of the target small base station, where the original coverage area of the target small base station corresponds to the B area in FIG.
  • the signal strength of the target small base station measured by the user equipment in the original coverage area of the target small base station is higher than the signal strength of the macro base station, and on the boundary line of the original coverage area of the target small base station, The signal strength of the target small base station is equal to the signal strength of the macro base station.
  • the area extension unit 201 expands a coverage area of the target small base station according to the limit number strength of the target small base station measured by all user equipments, so that some of the macro base stations are located.
  • the user equipment in the coverage area can also use the information provided by the target small base station, thereby High utilization of the target small base station.
  • An extension area is located next to a boundary line of the original coverage area of the target small base station, outside the original coverage area of the target small base station, and the signal of the target small base station measured by the user equipment in the extended area
  • the strength is greater than a preset threshold, where the preset threshold is the signal strength of the target small base station measured by the user equipment on the boundary line of the D area, and the specific value is set by the network administrator of the load balancing device.
  • the target small base station is extended by using the CRE technology, but the area where the CRE technology is used for expansion is limited, and the embodiment of the present invention can extend the coverage area of the small base station to receive the target small.
  • the area of the base station signal maximizes the coverage area of the target small base station.
  • the same frequency dual connection area includes a first extended area and a second extended area.
  • the first extended area is an area close to the original coverage area, and corresponds to the C area in FIG.
  • the second extended area is an area away from the original coverage area, corresponding to the D area in FIG.
  • the offset parameter of the signal strength of the target small base station in the first extended area is greater than the offset parameter of the signal strength of the target small base station in the second extended area.
  • the offset parameter of the signal strength of the target small base station is a reference signal received power RSRP of the target small base station.
  • the offset parameter of the configuration C area is -10 dB
  • the offset parameter of the D area is -20 dB, indicating that the RSRP of the target small base station continues to expand outward by -10 dB and -20 dB from the boundary line of the B area, that is, C
  • the RSRP in the region is reduced by 10 dB compared to the B region, and the RSRP in the D region is reduced by 20 dB from the B region.
  • the signal strength of the target small base station is different from the signal strength offset parameter of the target small base station, and the signal strength of the target small base station detected by the user equipment in the C area may be different, but the area is different.
  • the signal strength offset parameters of the target small base station are the same.
  • the strength obtaining unit 202 is configured to acquire, when the user equipment UE is connected to the macro base station, the signal strength of the target small base station measured by the UE.
  • the load balancing device 20 monitors the connection situation of the user equipment in the coverage area of the macro base station in real time, and when the user equipment UE is connected to the macro base station, the strength acquiring unit 202 acquires the UE measurement. The signal strength of the target small base station, so that the load balancing device determines which region in the FIG. 1 the UE is in.
  • the area determining unit 203 is configured to determine, according to the signal strength of the target small base station measured by the UE, whether the UE is in an intra-frequency dual connectivity area.
  • the area determining unit 203 determines, according to the signal strength of the target small base station measured by the UE acquired by the strength acquiring unit 202, whether the UE belongs to an intra-frequency dual-connection area, and the same frequency double
  • the connection area is an extended area obtained by expanding a coverage area of the target small base station.
  • the same-frequency dual-connection area corresponds to the C area and the D area in FIG. 1 and is an extended area of the target small base station.
  • the UE may measure the signal strength of the target small base station and the signal strength of the macro base station in the same-frequency dual-connection area, usually in the same-frequency dual-connection area.
  • the signal strength of the macro base station is higher than the signal strength of the target small base station, but because the user equipment in the coverage area of the macro base station is large, if the user equipment in the same frequency double connection area is connected to the macro base station,
  • the resources on the macro base station may cause a smaller bandwidth for each user equipment in the same-frequency dual-connection area, which is disadvantageous for data transmission, and the target small base station may be in an idle state, which not only causes the macro base.
  • the overload of the station also affects the user experience in the same frequency dual connectivity area. Therefore, the user equipment in the same-frequency dual-connection area in the embodiment of the present invention may be connected to the macro base station or to the target small base station, and the load balancing device 20 is configured according to the user equipment.
  • the specific location for the user equipment to allocate the macro base station and/or the target small base station as the serving base station does not burden the load of the macro base station nor affect the user experience.
  • an area covered by a macro base station can be regarded as a cell, and the macro base station provides services such as voice and data to user equipments in the cell in the form of carriers, and user equipments in the cell use carriers with the same carrier frequency, and This carrier is usually only present in the cell. Even if there is at least one small base station in the macro base station, the carrier frequency used by the user equipment in the coverage area of the small base station is equal to the carrier frequency transmitted by the macro base station. The carrier frequencies used by neighboring cells are different.
  • the load balancing device 20 configures a co-frequency carrier group for the user equipment in the same-frequency dual-connection area, that is, the load balancing device 20 uses the aggregation technology similar to carrier aggregation to the macro base.
  • the carrier transmitted in the station is processed, so that the user equipment configured with the same-frequency carrier group can be simultaneously connected to the macro base station and the target small base station.
  • CA technology introduces a technology to increase the transmission bandwidth introduced by the LTE system to meet the requirements of single-user peak rate and system capacity increase.
  • the CA technology can aggregate 2 to 5 LTE component carriers to achieve a maximum transmission bandwidth of 100 MHz, which effectively improves the uplink and downlink transmission rates.
  • the carrier frequencies of component carriers are different in CA technology.
  • each user equipment uses a separate hybrid automatic repeat request entity on each carrier, and each transport block can only be mapped to a specific carrier.
  • the PDCCHs are independent of each other, and resources are allocated to the PDSCH and PUSCH channels of each carrier using the PDCCH of each carrier.
  • the carrier indication field may also be used to schedule uplink and downlink resource allocation of multiple carriers by using a PDCCH channel on one carrier, thereby achieving high-speed transmission.
  • the aggregation technology in the embodiment of the present invention is different from the CA technology in that the CA technology aggregates carriers of two or more different frequencies, so that the user equipment obtains a large bandwidth, and the aggregation technology in the embodiment of the present invention utilizes One carrier transmitted by the macro base station is simultaneously connected to the macro base station and the target small base station.
  • the macro base station and/or the target small base station can be used to provide scheduling services for user equipments in the same-frequency dual-connection area by using the aggregation technology in the embodiment of the present invention.
  • the area judging unit 203 may include a first judging unit 2031, a second judging unit 2032, and a relationship determining unit 2033.
  • the first determining unit 2031 is configured to determine whether the signal strength of the target small base station measured by the UE is greater than the preset threshold.
  • the first determining unit 2031 first determines whether the signal strength of the target small base station measured by the UE is greater than the preset threshold.
  • the result of the first determining unit 2031 is YES, it can be understood that the UE can measure the signal strength of the target small base station and is greater than the preset threshold; when the first determining unit 2031 determines the result If not, it is understood that the UE measures that the signal strength of the target small base station is less than the preset threshold, or that the UE does not measure the signal strength of the target small base station, that is, the UE is located at this time.
  • a second determining unit 2032 configured to determine, when the result of the first determining unit is YES, whether the signal strength of the target small base station measured by the UE is smaller than an original coverage area boundary line of the target small base station Signal strength.
  • the UE can measure the signal strength of the target small base station and is greater than the preset threshold, and therefore the second The determining unit 2032 determines whether the signal strength of the target small base station measured by the UE is smaller than the signal strength of the original coverage area boundary line of the target small base station, and further determines whether the UE is located in the B area or the B area in FIG. Extended area other than .
  • the relationship determining unit 2033 is configured to determine that the UE belongs to the intra-frequency dual connectivity area when the result of the second determination unit determines yes.
  • the result of the second determining unit 2032 determines that it is YES
  • the signal strength of the target small base station measured by the UE is smaller than the signal strength of the original coverage area boundary line of the target small base station
  • the relationship determining unit 2033 determines that the UE belongs to the same-frequency dual-connection area
  • the same frequency double connection area corresponds to the C area and the D area in FIG.
  • the signal strength of the target small base station measured by the UE is equal to or greater than the signal strength of the original coverage area boundary line of the target small base station. Determining that the UE belongs to the original coverage area of the target small base station, and corresponds to the B area in FIG.
  • the instruction sending unit 204 is configured to send, when the user equipment UE is in the same-frequency dual-connection area, a dual-connection instruction, where the dual-connection instruction is used to indicate that the UE is simultaneously connected to the macro base station and the macro base station
  • the associated target small base station is an extended area obtained by expanding a coverage area of the target small base station.
  • the base station allocation unit 205 is configured to determine location information of the UE according to the signal strength of the target small base station measured by the UE, and allocate a serving base station to the UE according to the location information.
  • the load monitoring unit 206 is configured to monitor the load of the macro base station and the target small base station.
  • the TTI is usually 1 ms, so the method in the embodiment of the present invention is
  • the load balancing device 20 also schedules the macro base station and the target small base station according to the TTI in the LTE system.
  • the load monitoring unit 206 needs to monitor the load of the macro base station and the target small base station in real time to flexibly allocate the serving base station to the UE.
  • the reallocation unit 207 is configured to re-allocate the serving base station to the UE when the load of the macro base station is higher than a first preset threshold or the load of the target small base station is higher than a second preset threshold.
  • the load of the macro base station may be higher than a first preset threshold or the load of the target small base station is higher than the second pre-
  • the threshold is set, according to the mechanism that the LTE system schedules once every TTI, the re-allocation unit 207 re-allocates the serving base station for the user equipment in the same-frequency dual-connection area to balance the load of the macro base station and the target small base station. And fully utilizing resources of the macro base station and the target small base station to improve utilization of the target small base station.
  • the first preset threshold is a maximum load that ensures that the user equipment in the coverage area of the macro base station can work normally, and may be affected when the first preset threshold is higher than the first preset threshold.
  • the experience of the household is a maximum load that ensures that the user equipment in the coverage area of the target small base station can work normally. Generally, the second preset threshold is smaller than the first preset threshold.
  • the dual-connection instruction is sent to the UE, where the dual-connection instruction is used to indicate that the UE is simultaneously connected to the macro base station and the macro base.
  • a target small base station associated with the station the same-frequency dual-connection area is an extended area obtained by expanding a coverage area of the target small base station, and then determining the signal strength according to the signal strength of the target small base station measured by the UE.
  • the utilization of the small base station is improved, and the influence of the macro base station interference signal on the useful signal of the small base station can also be avoided.
  • FIG. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • the user equipment 30 includes a connection unit 301, a measurement unit 302, and a usage unit 303.
  • the connecting unit 301 is configured to establish a connection with the macro base station and the target small base station associated with the macro base station when receiving the dual connectivity command sent by the load balancing device.
  • the user equipment UE30 may receive an instruction sent by the load balancing device during the mobile or stationary process.
  • the user equipment 30 in the embodiment of the present invention is configured with the same frequency carrier group.
  • the dual connectivity instruction sent by the load balancing device can be simultaneously connected to the macro base station and A target small base station associated with the macro base station.
  • the UE 30 receives the dual connectivity command sent by the load balancing device, it indicates that the UE 30 is located in the same frequency double connection area, and the connection unit 301 establishes the macro base according to the dual connectivity instruction.
  • a connection with the target small base station is established while the stations are connected, so that the UE can simultaneously connect to the macro base station and the target small base station.
  • the user equipment usually establishes a connection with the macro base station, and if it is connected to the target small base station, disconnects the connection with the macro base station, and connects to the target small base station.
  • the interference signal of the macro base station affects the useful signal of the target small base station, thereby affecting the normal communication of the user equipment.
  • the same-frequency dual-connection area is obtained by expanding the coverage of the target small base station, and includes a first extended area and a second extended area, which respectively correspond to the C area and the D area in FIG.
  • a measuring unit 302 configured to measure a signal strength of the target small base station, and measure the target The signal strength of the standard small base station is fed back to the load balancing device, so that the load balancing device determines location information of the local device and allocates a serving base station to the device according to the location information.
  • the measuring unit 302 measures a signal strength of the target small base station, and feeds back the measured signal strength of the target small base station to the load balancing device, so that the load balancing device determines the UE 30.
  • the location information is used to allocate a serving base station to the UE 30 according to the location information.
  • the serving base station may be the target small base station, or may be the target small base station and the macro base station, according to the location information of the UE 30.
  • the load balancing device only determines that the UE 30 is in the same-frequency dual-connection area, but it is not clear whether the UE is located in the C area or the D area in FIG. 1, and therefore the load balancing apparatus needs to be based on
  • the signal strength of the target small base station measured by the measuring unit 302 is used to determine specific location information of the UE.
  • the using unit 303 is configured to acquire location information determined by the load balancing device, and use the serving base station allocated by the load balancing device.
  • the using unit 303 acquires location information determined by the load balancing device, and uses the serving base station allocated by the load balancing device. Specifically, when the UE 30 is located in the first extended area, that is, the C area in FIG. 1 , the serving base station is the target small base station, and the using unit 303 is provided by using the target small base station. a control channel, and receiving an uplink service and a downlink service scheduled by the target small base station; when the UE is located in the second extended area, that is, a D area in FIG. 1, the serving base station is the macro base station and the For the target small base station, the use unit 303 receives the downlink service scheduled by the macro base station and the uplink service scheduled by the target small base station by using the control channel provided by the macro base station.
  • the load balancing device when receiving the dual connectivity command sent by the load balancing device, establishing a connection with the macro base station and the target small base station associated with the macro base station, and measuring the target small base station Signal strength, then feeding back the measured signal strength of the target small base station to the load balancing device, finally acquiring location information determined by the load balancing device, and using the serving base station allocated by the load balancing device, thereby The impact of the handover base station on the user equipment is reduced, and the utilization of the small base station is improved.
  • FIG. 11 is a schematic structural diagram of still another load balancing apparatus according to an embodiment of the present invention.
  • the load balancing device is deployed in a macro base station in a heterogeneous network, and is a software of the macro base station. Module.
  • the load balancing apparatus includes: at least one processor 1001, such as a CPU, an input device 1003, an output device 1004, a memory 1005, and at least one communication bus 1002.
  • the communication bus 1002 is used to implement connection communication between these components.
  • the memory 1005 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory.
  • the processor 1001 can be combined with the load balancing device described in FIG. 6 to FIG. 9.
  • a set of program codes is stored in the memory 1005, and the processor 1001 calls the program code stored in the memory 1005 for performing the following operations:
  • the output device 1004 sends a dual-connection instruction to the UE, where the dual-connection instruction is used to indicate that the UE is simultaneously connected to the macro base station and the target associated with the macro base station.
  • a small base station where the same-frequency dual-connection area is an extended area obtained by expanding a coverage area of the target small base station;
  • the processor 1001 invokes the program code stored in the memory 1005 to perform the following steps before the user equipment UE is in the same-frequency dual-connection area, before transmitting the dual-connection instruction to the UE:
  • the target small base station And extending a coverage area of the target small base station associated with the macro base station, so that the extended coverage area of the target small base station includes an original coverage area and an intra-frequency dual connection area, where the original coverage area boundary line
  • the signal strength of the target small base station is equal to the signal strength of the macro base station, and the signal strength of the target small base station in the same-frequency dual-connection area is greater than a preset threshold;
  • the control input device 1003 acquires the signal strength of the target small base station measured by the UE;
  • the same-frequency dual-connection area includes a first extended area and a second extended area, where the first extended area is an area close to an original coverage area of the target small base station, and the second extended area is far from the An area of the original coverage area of the target small base station, the offset parameter of the signal strength of the target small base station in the first extended area is greater than the offset of the signal strength of the target small base station in the second extended area parameter.
  • processor 1001 invokes the program code stored in the memory 1005 to perform the expansion of the coverage area of the target small base station associated with the macro base station, the following steps are specifically performed:
  • the control input device 1003 counts the signal strength of the target small base station associated with the macro base station measured by all user equipments in the coverage area of the macro base station;
  • the processor 1001 calls the program code stored in the memory 1005 to determine whether the UE is in the same-frequency dual-connection area according to the signal strength of the target small base station measured by the UE, specifically executing the following step:
  • the processor 1001 invokes the program code stored in the memory 1005 to perform a dual connection instruction to the UE, and specifically performs the following steps:
  • the intra-frequency carrier group includes an intra-frequency primary cell and an intra-frequency secondary cell, where the same-frequency primary cell is The macro base station, the same-frequency secondary cell is the target small base station;
  • the dual connectivity instruction is used to indicate that the UE is simultaneously connected to the macro base station and the target small base station, and will connect to the The connection of the macro base station is used as a primary connection, and the connection to the target small base station is used as a secondary connection.
  • the processor 1001 calls the program code stored in the memory 1005 to perform determining the location information of the UE according to the signal strength of the target small base station measured by the UE, and according to the location information,
  • the UE allocates a serving base station, and specifically performs the following steps:
  • the processor 1001 calls the program code stored in the memory 1005 to perform the allocation of the target small base station to the UE as the serving base station, the following steps are specifically performed:
  • the output device 1004 is controlled to control the target small base station to schedule uplink services and downlink services of the UE.
  • the processor 1001 calls the program code stored in the memory 1005 to perform the allocation of the macro base station and the target small base station to the UE as the serving base station, the following steps are specifically performed:
  • the output device 1004 controls the macro base station to schedule downlink services of the UE, and controls the target small base station to schedule uplink services of the UE.
  • the processor 1001 calls the program code stored in the memory 1005 to perform allocation of the serving base station to the UE according to the location information, the following steps are also performed:
  • the output device 1004 is controlled to re-allocate the serving base station to the UE.
  • the dual-connection instruction is sent to the UE, where the dual-connection instruction is used to indicate that the UE is simultaneously connected to the macro base station and the macro base.
  • a target small base station associated with the station the same-frequency dual-connection area is an extended area obtained by expanding a coverage area of the target small base station, and then determining the signal strength according to the signal strength of the target small base station measured by the UE.
  • the embodiment of the present invention further provides a load balancing system, where the load balancing system includes a macro base station, a target small base station, and a load balancing device and user equipment in the embodiment of the present invention.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

Les modes de réalisation de l'invention concernent un procédé et un dispositif d'équilibrage de charge. Le procédé consiste : à transmettre, à un équipement utilisateur, une instruction de double connectivité lorsque l'UE est situé dans une zone à double connectivité intra-fréquence, l'instruction étant configurée pour donner instruction à l'UE de se connecter à une station de base macro et un nœud de basse puissance (LPN) associé à la station de base macro intra-fréquence, la zone à intra-fréquence double connectivité étant une zone d'expansion de la plage de cellules (CRE) après l'expansion d'une zone de couverture de la cible LPN ; à déterminer, conformément à une intensité de signal de la cible LPN et mesurée par l'UE, des informations de localisation de l'UE, et à attribuer, en fonction des informations de localisation, une station de base de desserte à l'UE. Les modes de réalisation de la présente invention peuvent réaliser de manière souple et rapide le réglage de charges dans un réseau hétérogène (HetNet), équilibrant les charges dans le HetNet, et augmentant un taux d'utilisation de LPNs.
PCT/CN2015/085777 2015-07-31 2015-07-31 Procédé et dispositif d'équilibrage de charge WO2017020192A1 (fr)

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