WO2012146109A1 - 容量站激活的方法及无线通信装置与系统 - Google Patents

容量站激活的方法及无线通信装置与系统 Download PDF

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Publication number
WO2012146109A1
WO2012146109A1 PCT/CN2012/072995 CN2012072995W WO2012146109A1 WO 2012146109 A1 WO2012146109 A1 WO 2012146109A1 CN 2012072995 W CN2012072995 W CN 2012072995W WO 2012146109 A1 WO2012146109 A1 WO 2012146109A1
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WO
WIPO (PCT)
Prior art keywords
station
capacity
activated
stations
measurement result
Prior art date
Application number
PCT/CN2012/072995
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English (en)
French (fr)
Inventor
张舜卿
徐修强
陈雁
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP12776850.5A priority Critical patent/EP2704493B1/en
Publication of WO2012146109A1 publication Critical patent/WO2012146109A1/zh
Priority to US14/066,404 priority patent/US9042879B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave where the power saving management affects multiple terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/06—Hybrid resource partitioning, e.g. channel borrowing
    • H04W16/08—Load shedding arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/32—Hierarchical cell structures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • 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
    • H04W28/0284—Traffic management, e.g. flow control or congestion control detecting congestion or overload during communication
    • 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 embodiments of the present invention relate to communication technologies, and in particular, to a method, a device, and a wireless communication system for base station device activation and power control. Background technique
  • the operator When deploying a wireless network in an area, the operator often deploys a heterogeneous or homogeneous inter-frequency point network or deploys a capacity station in a hotspot area for service upgrade and capacity enhancement based on providing basic network coverage.
  • a base station that provides basic network coverage as a coverage station
  • a base station or hotspot station that performs service upgrade or capacity enhancement and overlaps coverage with the coverage station is a capacity station.
  • the existing capacity station activation scheme may have the following problems when applying, that is, after multiple capacity stations are activated at the same time and operate at the maximum power transmission level, the coverage station load may drop to a very low level or even at a zero load state. In fact, this is not conducive to the overall energy efficiency of the network. Summary of the invention
  • the embodiment of the invention provides a method for capacity station activation to more accurately determine a capacity station that needs to be activated, and can control the transmission power of the activated capacity station and reduce the energy consumption of the entire system.
  • a method of capacity station activation comprising: Transmitting, to the capacity station, first activation control information, wherein the first activation control information is used to cause the capacity station to send a pilot signal to a user in a linked state with the coverage station by using the first transmission power, the capacity station belongs to the Receiving a first measurement result of the pilot signal by the user, determining, according to the first measurement result, a capacity station that needs to be activated to meet a system requirement; and transmitting activation information to the capacity station that needs to be activated The capacity station that needs to be activated is activated to operate at the first transmission power;
  • the capacity station that needs to be activated to meet the system requirement cannot be selected according to the first measurement result, sending, to the capacity station, second activation control information, where the second control information is used to enable the capacity station to use the second transmission power Transmitting a pilot signal to a user in a linked state with the overlay station; receiving a second measurement result of the pilot signal by the user, determining the capacity station that needs to be activated according to the second measurement result;
  • the activated capacity station transmits activation information such that the capacity station that needs to be activated is activated to operate at the second transmission power;
  • the first control transmit power is less than the second transmit power.
  • a wireless communication system including a capacity station and a coverage station, the capacity station being attributed to the coverage station, the capacity station including at least two levels of transmit power,
  • the coverage station is configured to send a plurality of activation control information to the capacity station, the multiple activation control information causing the capacity station to transmit a pilot signal to a user in a power-increasing manner, and receiving the user-paired Deriving a measurement result of the pilot signal, determining, according to the measurement result, a capacity station that needs to be activated to meet the system requirement, and transmitting activation information to the determined capacity station that needs to be activated;
  • the capacity station is configured to receive activation control information of the coverage station, and send a pilot signal to the user in a manner of increasing transmission power until the coverage station determines a capacity station that needs to be activated to meet system requirements, and is also used to sleep. Receiving the activation information sent by the coverage station and converting to the working state, and operating the power of the pilot signal when the capacity station that needs to be activated determined by the coverage station transmits the activation information.
  • the embodiment of the present invention further provides a wireless communication base station, including: a sending unit, configured to send, to the capacity station that belongs to the base station, multiple activation control information, where the multiple activation control information is used to enable the The capacity station sends a pilot signal to the user in a power-increasing manner; the receiving unit is configured to receive the measurement result that the user sends the pilot signal;
  • a calculating unit configured to determine, according to the measurement result of the pilot signal sent by the user, a capacity station that needs to be activated to meet a system requirement, and send, by the sending unit, the activation information to the capacity station that needs to be activated, so as to be in a dormant state
  • the capacity station that needs to be activated is transformed into an active state, and the power of the pilot station is transmitted when the capacity station that needs to be activated determined by the coverage station transmits activation information.
  • the pilot station transmits the pilot signal in a power-increasing manner to perform capacity station activation, and determines a suitable transmission power according to the measurement of the pilot signal by the user, so that the capacity station may work below after activation.
  • FIG. 1 is a flow chart of a method for activating a capacity station according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a wireless communication system according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention. detailed description
  • the capacity station uses at least two pilot transmit powers, respectively, in the activation decision process.
  • w and P max where P max may be the maximum transmit power of the hotspot station pilot, &. w is a preset power level below P max .
  • P max may be the maximum transmit power of the hotspot station pilot
  • &. w is a preset power level below P max .
  • the hotspot station can adopt more grades of pilot transmission power, wherein the highest level of transmission power is preferably a hotspot.
  • the station pilot transmits the maximum power, and the implementation medium capacity station adjusts the pilot transmission power in increments of three ways until the coverage station determines the appropriate capacity station to be activated.
  • the hotspot station is a capacity station and the macro base station is an overlay station.
  • the coverage station and the capacity station can be of the same standard or different systems.
  • the load is represented by a typical factor of the number of connected users, i.e., the number of connected users indicates the change in macro base station load and the amount of load that can be absorbed after the hotspot station is activated. It should be noted that the technical solution described in the present invention is also applicable to the case where the load of the base station is represented by other factors such as the air interface resource occupancy rate, or the combination of any number of factors such as the number of connected users and the occupancy rate of the air interface resources. .
  • the capacity station group of all the capacity stations in the coverage range is S t .
  • N (N ⁇ l) of the dormant capacity stations (for example, hotspot stations) will participate in the activation decision, respectively: , 3 ⁇ 4, ..., !3 ⁇ 4, and represent these with the capacity station group S
  • S can be equal to S t .
  • Tal can also be S t .
  • the subset of tal that is, the macro base station can allow all the hotspot stations in the coverage state to participate in the activation decision, or select some hotspot stations whose coverage is in the sleep state to participate in the activation decision, for example, the macro base station is executing.
  • the hotspot station activates the decision process, refer to the long-term load statistics of each hotspot station in the dormant state. If the long-term load statistics are displayed in the next time, a hotspot station will maintain a very low load for a long time after activation. Horizontally, or only capable of maintaining a medium to high load of 4 ⁇ short time, the macro base station excludes the hot spot station from the capacity station group S.
  • a hotspot station that is in a dormant state but does not belong to the capacity station group S within the coverage of the macro base station will remain in a dormant state and will not participate in the activation decision.
  • the load here includes at least the following factors: Number of connected users.
  • FIG. 1 a flow chart of a method for activating a capacity station according to an embodiment of the present invention.
  • the method is implemented as an overlay station or OAM (Operation Management and Maintenance Module).
  • OAM Operaation Management and Maintenance Module
  • S101 Send first activation control information to the capacity station, where the first activation control information is used to enable And the capacity station sends a pilot signal to a user in a linked state with the coverage station by using the first transmit power, and the capacity station belongs to the coverage station;
  • S102 Receive a first measurement result of the pilot signal by the user, and determine, according to the first measurement result, a capacity station that needs to be activated to meet a system requirement;
  • S103 sending activation information to the capacity station that needs to be activated, so that the capacity station that needs to be activated is activated and operates at the first transmission power;
  • S104 if the capacity station that needs to be activated to meet the system requirement cannot be selected according to the first measurement result, send, to the capacity station, second activation control information, where the second control information is used to cause the capacity station to use the second transmission. Transmitting a pilot signal to a user in a linked state with the overlay station; receiving a second measurement result of the pilot signal by the user, determining, according to the second measurement result, the capacity station that needs to be activated; The capacity station that needs to be activated transmits activation information such that the capacity station that needs to be activated is activated to operate at the second transmission power;
  • the first control transmit power is less than the second transmit power.
  • the activation information is sent to all the capacity stations participating in the activation decision of the coverage station and the activated capacity station is Maximum transmit power is working.
  • the capacity station that needs to be activated may be comprehensively determined according to the first measurement result and the second measurement result, for example, calculating a difference between the first measurement result and the second measurement result, and determining, according to the difference value, the capacity station that needs to be activated The user who is in need of activation is activated and the user is located in the center of the cell.
  • the capacity station has more transmission power levels, if the coverage station does not select a suitable capacity station that needs to be activated, the transmission power of the pilot signal is sequentially adjusted, and the measurement result of the pilot signal is sequentially determined according to the user. The selection of the capacity station needs to be activated until a suitable capacity station that needs to be activated is determined. It can be considered that the above steps are repeated at different transmission powers. If the transmission power of each level fails to select a capacity station that needs to be activated to meet the system requirements, then the activation information is transmitted to all the capacity stations participating in the activation decision of the coverage station and activated. The latter capacity station operates at its maximum transmit power.
  • the pilot station transmits the pilot signal in a power-increasing manner to perform capacity station activation, and determines a suitable transmission power according to the measurement of the pilot signal by the user, so that the capacity station may work below after activation.
  • the transmission power of these capacity stations can be preferentially increased to the maximum level to further absorb the load.
  • Embodiment 1 of the present invention introduces a cell activation scheme in which both a macro base station and a hotspot station are EUTRAN base stations.
  • Step 1 When the number of connected users of the macro base station exceeds the preset threshold c teesh .
  • the macro base station When ld (first threshold), the macro base station notifies the hotspot station in the capacity station group S to &.
  • the pilot power level of w transmits the pilot signal of T time, and can also send a synchronization signal (the hotspot station stops transmitting after T time is sent, returns to the sleep state), and configures the pilot of the macro base station connected state to send the hotspot station in S. The signal is measured and reported.
  • the sum is just less than the preset threshold second threshold Cth rcsh . ld (i.e., the macro base station by subtracting the total number of users currently connected state before the M-1 corresponding to the pico station after a d- sum greater than a preset threshold C thrcsh. i), then the M alternatively hot pico station activation Station, and with the capacity station group s wake — up — ( s wake — up is a subset of the capacity station group S), go to step 3; if M is not selected, that is, the total number of users of the macro base station currently connected state minus the capacity
  • the C ⁇ and sum of all hotspot stations in station group S are still greater than the preset threshold.
  • Step 3 If the Ci_M corresponding to the Mth hotspot station of the selected M hotspot stations is greater than the preset threshold third threshold C teesh . Ld 2 , then the macro base station activates the hotspot station in the capacity station group S wake — up and Let it work at &. The pilot power transmission level of w , the other hotspot stations in the capacity station group S continue to remain in a dormant state, go to step XI; if the M hotspot stations in the selected M hotspot stations correspond to
  • Step 4 The macro base station notifies the hotspot station in the capacity station group S wake - up i to transmit the pilot signal of the T time and the synchronization signal at the pilot power level of P max (the hotspot station stops transmitting after T time is sent, and returns to the sleep state) and configure the macro base station to a user connected state Swake - up - pico station pilot signal transmitted measurement report, proceeds to step five.
  • the W hotspot stations are used as activated alternative hotspot stations, and represented by the capacity station group S wake — up — 2 (S wake — up — 2 is a subset of the capacity station group S), go to the step 6; If W is not selected (ie, the appropriate W is never selected), that is, the total number of users in the current connected state of the macro base station minus the d, 2 sum of all hotspot stations in the capacity station group S wake — up i is still greater than the pre- Set the threshold C teesh . Then go to step seven.
  • Step 6 The macro base station activates the hotspot station in the capacity station group S wake — up 2 and makes it work at the pilot power transmission level of P max , and the other hotspot stations in the capacity station group S continue to remain in the sleep state, go to step ten One.
  • Step 7 The macro base station notifies the hotspot station in the capacity station group S to transmit the pilot signal of the T time and the synchronization signal at the pilot power level of P max (the hotspot station stops transmitting after T time is sent, returns to the sleep state), and configures the macro base.
  • the station connected state user reports the pilot signal sent by the hotspot station in S, and goes to step 8.
  • the Q hotspot stations will be the activated alternative hotspot stations, and the capacity station group S wake — up — 3 (S wake _ up _ 3 is the capacity station group subset S) is represented, to step 9; Q is selected if not, i.e., the macro base station by subtracting the total number of users currently connected state capacity station set S corresponding to the station all hotspots d, 3 is still greater than the preset threshold the sum of C teesh . Ld goes to step ten.
  • Step 9 The macro base station activates the hotspot station in the capacity station group S wake — up 3 and operates it at the pilot power transmission level of P max , and the other hotspot stations in the capacity station group S continue to remain in the sleep state, go to step ten One.
  • Step 10 The macro base station activates all hotspot stations in the capacity station group S and has it operate at the pilot power transmission level of P max , and proceeds to step XI.
  • Step 11 When the number of connected users of the macro base station is further increased and exceeds the preset threshold first threshold c thrcsh .
  • the macro base station if there is a hotspot station with active but not full power transmission in the coverage area, the macro base station notifies the hotspot stations that are activated but not full power to increase the pilot power to the maximum transmission level; if all the macro base station load range has been After the activated hotspot stations all work at the maximum emission level of the pilot power, the number of connected users of the macro base station is still higher than the first threshold c teesh .
  • the macro base station repeats steps 1 to 10 to perform the hotspot activation process until all hotspot stations in the coverage of the macro base station are in an active state and operate at the maximum pilot power emission level.
  • steps 1 through 6 are repeated.
  • the macro base station selects an alternative hotspot. After the station capacity group, all the hotspot stations in the capacity station group are activated, and the hot station is not able to efficiently absorb the macro base station load for verification.
  • Embodiment 2 of the present invention discloses a cell activation scheme in which a macro base station is a UTRAN base station and a hotspot station is an EUTRAN base station.
  • the macro base station provides basic network coverage, and the hotspot station is deployed in the hotspot area within the coverage of the macro base station for capacity enhancement and is completely covered by the macro base station.
  • the hotspot station activation may be applied by applying the technical solution of the present invention.
  • the hotspot station uses two pilot transmit powers during the activation decision process, which are respectively
  • P lc3W and P max where &. w is a preset power level lower than P max , and P max may be the hot spot station pilot maximum transmission power.
  • Step 1 When the OAM detects that the number of connected users of the macro base station exceeds the preset threshold C thrcsh . When ld ,
  • the OAM notifies the hotspot station in the capacity station group S to &.
  • the pilot power level of w transmits the pilot signal of T time and the synchronization signal (the hotspot station stops transmitting after T time is sent, returns to the sleep state), and notifies the macro base station; the macro base station configures the connection of the connected state user to the hotspot station in S.
  • the frequency signal is measured and reported to go to step 2.
  • the M hotspot stations are used as the activated alternative hotspot stations, and represented by the capacity station group S wake — up — (S wake — up i is a subset of the capacity station group S), go to step 3;
  • the total number of users in the current connected state of the macro base station minus the Ci, l corresponding to all hotspot stations in the capacity station group S is still greater than the preset threshold C teesh . Then go to step seven.
  • Step 3 If the Mth hotspot station of the selected M hotspot stations corresponds to d_ is greater than a preset threshold (third threshold) Cth resh . Ld 2 , then the OAM activates the hotspot station in the capacity station group Swake_up_1 and operates it at the pilot power transmission level of P tow , and notifies the macro base station of the state transition of the hotspot station and the pilot power information, in the capacity station group S The other hotspot stations continue to sleep, and go to step 11; if the Ci_M corresponding to the Mth hotspot station of the selected M hotspot stations, l is smaller than the preset threshold C teesh . Ld 2 , then go to step four.
  • a preset threshold third threshold
  • Step 4 The OAM notifies the hotspot station in the capacity station group S wake - up i to transmit the pilot signal of the T time and the synchronization signal at the pilot power level of P max (the hotspot station stops transmitting after T time, returns to the sleep state), And the macro base station is notified; the macro base station configures the connected state user to measure and report the pilot signal sent by the hotspot station in the S wake - up , and proceeds to step 5.
  • the number of macro base station users of the event denoted as d, 2 , and sort the hotspot stations in descending order of d, 2 .
  • Step 6 OAM activates the hotspot station in the capacity station group S wake — up 2 and it works at P max
  • the pilot power transmission level is notified to the macro base station by the state transition of the hot spot station and the pilot power information, and the other hotspot stations in the capacity station group S continue to remain in the sleep state, and go to step 11.
  • Step 7 The OAM notifies the hotspot station in the capacity station group S to transmit the pilot signal of the T time and the synchronization signal at the pilot power level of P max (the hotspot station stops transmitting after the T time is sent, returns to the sleep state), and notifies the macro base station.
  • the macro base station configures the connected state user to measure and report the pilot signal sent by the hotspot station in S, and goes to step 8.
  • the number of macro base station users of the event denoted as d, 3 , and sort the hotspot stations in descending order of d, 3 .
  • the sum is just less than the preset threshold Cth rcsh .
  • Ld — i that is, the total number of users in the current connected state of the macro base station minus the Ci— m corresponding to the previous Q-1 hotspot stations, and the sum of 3 will be greater than the preset threshold C teesh .
  • the Q hotspot stations will be As an activated alternative hotspot station, and represented by the capacity station group S wake — up — 3 (S wake — up 3 is a subset of the capacity station group S), go to step IX; if Q is not selected, the macro base station The total number of currently connected users minus the Ci corresponding to all hotspots in the capacity station group S, and the total sum is still greater than the preset threshold.
  • Step 9 The OAM activates the hotspot station in the capacity station group S wake — up 3 and operates it at the pilot power transmission level of P max , and notifies the macro base station of the state transition and pilot power information of the hot spot station, the capacity station group The other hotspot stations in S continue to sleep, go to step 11.
  • Step 10 The OAM activates the hotspot station in the capacity station group S and operates it at the pilot power transmission level of P max , and notifies the macro base station of the state transition of the hotspot station and the pilot power information, and proceeds to step XI.
  • Step 11 When the number of connected users of the macro base station is further increased and exceeds the preset threshold C teesh .
  • the OAM notifies the hotspot stations that are activated but not full power to increase the pilot power to the maximum emission level, and the hotspot station The pilot power information is notified to the macro base station; if all the activated hotspot stations in the coverage of the macro base station are working at the maximum pilot power emission level, the number of connected state users of the macro base station is still higher than Then, the OAM and the macro base station repeat steps 1 to 10 to perform the hotspot activation process until all the hotspot stations in the coverage of the macro base station are in an active state and operate at the maximum pilot power emission level.
  • steps one through six are repeated.
  • the threshold C thrcsh is preset. If ld 2 is small or 0, then after OAM selects the candidate hotspot station capacity group, all the hotspot stations in the capacity station group are activated, and the hot station is not able to efficiently absorb the macro base station load.
  • the macro base station when the hotspot station only transmits the pilot signal and the synchronization signal, the macro base station does not switch the connected state user to the hotspot station.
  • the network scenario in the third embodiment of the present invention is as follows:
  • the base station A on the frequency point fl provides basic network coverage for a certain area, and the base station B/C/D on the frequency point f2 overlaps with the base station A, and the base station A and the base station B /C/D can be a heterogeneous base station or a homogeneous inter-frequency point base station. All or part of the base stations in the base station B/C/D are in a dormant state for energy saving. When the load of the base station A is high, all or part of the base station B/C/D may be in a dormant state by using the technical solution proposed by the present invention.
  • the base station is enabled to operate at the appropriate pilot transmit power level while ensuring that the load on base station A drops to an appropriate level.
  • the threshold C thresh is preset.
  • all the base station capacity stations on the frequency point f2 that overlap with the base station A and are in a dormant state are S t .
  • N (N ⁇ l) sleeping stations will participate in the activation decision, namely: HI, H2, ..., HN, with the capacity station group S indicating these frequency points f2 that will participate in the activation decision Base station on.
  • S can be equal to S t .
  • Tal can also be S t .
  • the ta subset may cause all the base stations on the frequency point f2 that overlap with the base station A to be in a dormant state to participate in the activation decision, or may only select the overlap coverage with the base station A on the frequency point f2 and be in a dormant state according to some algorithms.
  • Part of the base station participates in the activation decision, for example, before performing the base station activation decision process, the reference frequency
  • a base station that overlaps with base station A at frequency point f2 and is in a dormant state but does not belong to capacity station group S will maintain a dormant state and not participate in an activation decision.
  • the load here includes at least the following factors: Number of connected users.
  • Step 1 When the OAM detects that the number of connected users of the base station A exceeds the preset threshold Cth rcsh . At ld , the OAM notifies the base station in the capacity station group S to &.
  • the pilot power level of w transmits the pilot signal of the T time and the synchronization signal (the base station stops transmitting after T time is sent, returns to the sleep state), and notifies the base station A; the base station A configures the pilot signal sent by the connected state user to the base station in the S. Perform the measurement report and go to step 2.
  • the sum is just less than the preset threshold Cth rcsh .
  • Ld is the total number of users in the current connected state of base station A minus the sum of d- 1 corresponding to the first M-1 base stations, and will be greater than the preset threshold Cthreshold.l, then the M base stations are used as active candidate base stations, and the capacity station group S wake — up — ( Swake_up_l is a subset of the capacity station group S), go to step 3; if M is not selected, that is, the total number of users in the current connected state of base station A minus the Ci corresponding to all base stations in the capacity station group S, l After the sum is still greater than the preset threshold Cthreshold_l, go to step 4.
  • Step 3 If the Ci_M,1 corresponding to the Mth base station of the selected M base stations is greater than the preset threshold Cthreshold_2, the OAM activates the base station in the capacity station group Swake_up_1 and operates it at the pilot power transmission level of Plow, and Notifying the base station A of the state transition of the base station and the pilot power information, and the other base stations in the capacity station group S continue to remain in the dormant state, and go to step eight; If Ci_M, l corresponding to the Mth base station of the selected M base stations is smaller than the preset threshold Cthreshold_2, go to step 4.
  • Step 4 The OAM notifies the base station in the capacity station group S to transmit the pilot signal of the T time and the synchronization signal at the pilot power level of Pmax (the base station stops transmitting after the T time is sent, returns to the sleep state), and notifies the base station A; the base station A Configure the connected mode user to report the pilot signal sent by the base station in S, and go to step 5.
  • the number of users of the base station A that switches the condition and reports the handover event is denoted as Ci, 2, and the base stations in the capacity station group S are sorted in descending order of Ci, 2.
  • W is not selected, that is, the total number of users in the current connection state of base station A minus the Ci corresponding to all base stations in the capacity station group S, and the sum of 2 is still greater than the preset threshold Cthreshold_l, then go to step 7.
  • Step 6 The OAM activates the base station in the capacity station group Swake_up_2 and operates at the pilot power transmission level of P max , and notifies the base station A of the state transition of the base station and the pilot power information, and proceeds to step 8.
  • Step 7 The OAM activates the base station in the capacity station group S and operates it at the pilot power transmission level of P max , and notifies the base station A of the state transition and pilot power information of the base station, and proceeds to step 8.
  • Step 8 When the number of connected users of the base station A is further increased and exceeds the preset threshold C teesh .
  • the OAM if there is a base station that is activated but not full power transmitted in the base station overlapping with the base station A at the frequency point f2, the OAM notifies the base stations that are activated but not full power to increase the pilot power to the maximum emission level, and The base station pilot power information informs the base station A; if the frequency point f2 is equal to the base station A When all the activated base stations covered by the overlap are working at the maximum transmission power level of the pilot power, the number of connected users of the base station A is still higher than that of the C teesh .
  • the OAM repeats steps 1 through 7, and performs a base station activation process until all base stations overlapping with the base station A at the frequency point f2 are in an active state and operate at a maximum pilot power transmission level.
  • steps 1 through 3 are repeated.
  • the preset threshold Cthreshold_2 is small or zero, then after the OAM selects the candidate base station capacity station group, all the base stations in the capacity station group are activated, and the base station A cannot efficiently absorb the load of the base station A. Do the inspection.
  • the base station A on the frequency point fl provides basic network coverage for a certain area
  • the base station B and the base station A on the frequency point f2 share the address and overlap
  • the base stations A and B can It is a heterogeneous base station, and it can also be a homogeneous inter-frequency base station.
  • the base station B is in a dormant state for energy saving.
  • the base station B can be activated by using the technical solution proposed by the present invention, so that the base station B operates at an appropriate pilot transmit power level while ensuring that the load of the base station A falls. The right level.
  • Step 1 When the OAM detects that the base station A load exceeds the preset threshold C thrcsh .
  • the OAM activates the base station B and operates it at the pilot power transmission level of the P lQW , and notifies the base station A of the state transition and pilot power information of the base station B, and proceeds to step 2.
  • Step 2 The base station A transfers part of the load to the base station B, so that the load of the base station A is lower than the preset threshold C teesh . Ld , and the load of base station B is lower than the preset threshold C thrcsh . Ld , go to step three.
  • Step 3 If the load of the base station is further increased, and exceeds the preset threshold C teesh . Ld , and the load of base station B exceeds the preset threshold C teesh . Ld — , OAM notifies base station B to increase pilot transmit power Up to the P max level, and the base station frame's pilot power information is notified to the base station.
  • the base station ⁇ uses more than two pilot transmission powers during the activation process, repeat steps one through three.
  • the macro base station provides basic network coverage, that is, the coverage station, and the hotspot station is deployed in the hotspot station area within the coverage of the macro base station to perform capacity enhancement, that is, the capacity station, and is completely covered by the macro base station.
  • capacity enhancement that is, the capacity station
  • the hotspot station activation may be applied by applying the technical solution of the present invention.
  • the macro base station and the hotspot station here can be of the same standard or different systems.
  • S may be a capacity station group of all the capacity stations in the sleep state within the coverage of the macro base station, or may be the above-mentioned capacity station group Subset
  • initialize n l, go to step two.
  • Step 1 is optional.
  • all the capacity stations that are in the dormant state are the capacity stations that need to participate in the activation judgment, and the macro base station or the OAM can refer to the capacity of each of the sleep states before performing the capacity station activation decision process.
  • Long-term load statistics of the station If the long-term load statistics show that after a certain capacity station is activated for a long time, it will maintain a low load level of 4 ⁇ , or only maintain a medium-high load for a short time.
  • the macro base station excludes the capacity station from the capacity station group S. A capacity station that is in a dormant state but does not belong to the capacity station group S within the coverage of the macro base station will remain dormant and will not participate in the activation decision.
  • Step three OAM macro base station or receiving a measurement result transmitted from each user, selecting the candidate capacity station set S m (8 "1 is a subset of S m4) and a preset algorithm according to the measurement result reported by the user if the macro base station according to the pre
  • Step 5 The macro base station or OAM activates all the capacity stations in the capacity station group S m and allows it to operate at the pilot power transmission level of P m+n 4, and proceeds to step eight.
  • Step 6 The macro base station or the OAM notifies the capacity station in the capacity station group S m4 to transmit the pilot signal and the synchronization signal at the pilot power level of P m+n4 , and configure the pilot transmitted by the macro base station user to the capacity station in S m4 .
  • the signal is reported and returned to step 3.
  • Step 7 The macro base station or OAM notifies the capacity station group S.
  • the capacity station in the middle transmits the pilot signal and the synchronization signal at the pilot power level of P N and configures the macro base station user pair S.
  • the pilot signal sent by the medium capacity station is measured and reported.
  • OAM macro base station or group of selected candidate capacity station Si (8 1 8 is a subset) of the macro base station according to the measurement result reported by the user and a preset algorithm. If the capacity station group Si exists, the macro base station or OAM activates all the capacity stations in Si and allows it to operate at the pilot power transmission level of the PN, go to step eight; otherwise, the macro base station or OAM activates S. In all capacity stations, and let it work at the PN's pilot power transmission level, go to step eight.
  • Step 8 When the macro base station load is further increased and exceeds the preset threshold, if there is a capacity station with active but not full power transmission in the coverage area, the macro base station or OAM notifies the activated capacity stations that are not fully transmitted. Frequency power to maximum transmission level; if all activated capacity stations in the macro base station load range are operating at the maximum pilot power emission level, the macro base station load is still higher than By default, the macro base station or OAM repeats steps 1 through 7 to perform the capacity station activation process until all capacity stations within the macro base station coverage are active and operate at the maximum pilot power emission level.
  • the capacity station when the macro base station or the OAM selects the candidate capacity station group Si (Si is a subset of S 0 ) according to the measurement result reported by the macro base station user and the preset algorithm, the capacity station may not be used.
  • the efficiency of the capacity station 7 is loaded, and all the capacity stations in the capacity station group S1 are directly activated and allowed to work at the current pilot power transmission level, that is, step 4 can be removed in all the above steps.
  • Step 6 The main steps of the technical solution are as follows:
  • step one is optional.
  • all the capacity stations are the capacity stations that need to participate in the judgment, that is, all the capacity stations form the first capacity station group S 0 by default.
  • Step 2 If n ⁇ N, the macro base station or OAM notifies the capacity station group S.
  • Step 4 The macro base station or OAM activates all capacity stations in the capacity station group Si, and let it work at the P pilot power transmission level, go to step 6.
  • Step 5 The macro base station or OAM notifies the capacity station group S.
  • the capacity station in the middle transmits the pilot signal and the synchronization signal at the pilot power level of P N and configures the macro base station user pair S.
  • the pilot signal sent by the medium capacity station is measured and reported.
  • OAM macro base station or group of selected candidate capacity station Si (8 1 8 is a subset) of the macro base station according to the measurement result reported by the user and a preset algorithm.
  • Macro if the capacity station group Si exists
  • the base station or OAM activates all capacity stations in Si and allows it to operate at the Pr ⁇ pilot power transmission level, go to step six; otherwise, the macro base station or OAM activates S. In all capacity stations, and let it work at the pilot power send level, go to step six.
  • Step 6 When the macro base station load is further increased and exceeds the preset threshold, if there is a capacity station with active but not full power transmission in the coverage area, the macro base station or OAM notifies the capacity stations that activate but not full power to improve. Frequency power to maximum transmission level; If all activated capacity stations in the macro base station load range operate at the maximum pilot power level, the macro base station load is still higher than the preset threshold, then the macro base station or OAM repeats step one to step 7. Perform the capacity station activation process until all capacity stations within the coverage of the macro base station are active and operate at the maximum emission level of the pilot power.
  • the macro base station or the OAM selects a candidate capacity station group according to the measurement result reported by the macro base station user and a preset algorithm, where the preset algorithm includes:
  • the macro base station or the OAM counts the load conditions of the macro base stations that can be absorbed by the respective capacity stations when transmitting the pilots at the current power, sorts the capacity stations in descending order, and selects the first several or more capacity stations as the candidate capacity.
  • the station group makes all the capacity stations in the capacity station group bear the load and just reduces the macro base station load to an appropriate level.
  • the macro base station or OAM combines the amount of load that each capacity station can absorb when transmitting the pilot at the current power, the amount of load that can be absorbed when transmitting the pilot from the above power level, and the difference between the two, and selects the candidate capacity. Station group. For example, according to whether the load amount that can be absorbed by each capacity station when transmitting the pilot at the current power exceeds a certain threshold, the partial capacity station is roughly selected as a rough selection station group, and then according to each capacity station, the current power is transmitted.
  • the difference between the amount of load that can be absorbed at the pilot and the amount of load that can be absorbed when the pilot is transmitted at the previous power level is selected from the group of coarsely selected capacity stations, so that all capacity in the group of candidate stations After the station bears the load, it just happens to reduce the macro base station load to an appropriate level.
  • the capacity station transmits the pilot signal in a power-increasing manner according to the indication of the coverage station or the OAM, and the coverage station configures the user to report and report the pilot signal sent by the capacity station at different power levels, and each time the user reports
  • the reported measurement results are analyzed and processed, so that on the one hand, the coverage of the coverage station that can be absorbed after each capacity station is activated can be determined, and on the other hand, the possible user distribution after the activation of the capacity station can be known, and the information of the two aspects is combined to cover
  • the station or OAM can greatly improve the decision accuracy of the capacity station activation, avoiding the wrong capacity station being activated while activating the correct capacity station, thereby avoiding the waste of power and resources caused by the wrong activation of the capacity station and the user being Unnecessary mobility between the
  • the embodiment of the present invention further provides a device system for implementing the above method, which is used to complete the above method.
  • the method it can accomplish is as previously described.
  • FIG. 2 a schematic diagram of a wireless communication system includes a capacity station and a coverage station, and the capacity station belongs to the coverage station, and the capacity station includes at least two levels of transmission power.
  • (a) is a base station B/C/D of a heterogeneous or homogeneous inter-frequency point overlapping with the base station A
  • (b) is a base station E of a heterogeneous or homogeneous inter-frequency point.
  • the base station A on the frequency point fl provides a basic network coverage for the coverage area, and the base station E at the frequency point f2 is the capacity station.
  • A is the coverage station and B/C/D/E is the capacity station.
  • the macro base station in (C) provides a basic network coverage base station, which is an overlay station, and the hotspot station provides service upgrade or capacity enhancement and overlaps coverage with the coverage station as a capacity station.
  • the overlay station is configured to send a plurality of activation control information to the capacity station, the plurality of activation control information causing the capacity station to transmit a pilot signal to the user in a power incremental manner, and receiving the user to the pilot a measurement result of the frequency signal, determining, according to the measurement result, a capacity station that needs to be activated to meet the system requirement, and transmitting activation information to the determined capacity station that needs to be activated;
  • the capacity station is configured to receive activation control information of the coverage station, and send a pilot signal to the user in a manner of increasing transmission power until the coverage station determines a capacity station that needs to be activated to meet the system requirement, and is also used when in the sleep state.
  • Receiving activation information sent by the coverage station and converting to an active state, and And the power of the pilot station transmits the pilot signal when the capacity station that needs to be activated determined by the coverage station sends the activation information.
  • the embodiment of the present invention provides a base station, which is used as an overlay station, and can implement the processing of the overlay station in the foregoing method embodiment.
  • the specific processing flow is described in the foregoing method embodiment.
  • FIG. 3 a schematic structural diagram of a base station 30 according to an embodiment of the present invention is shown.
  • the sending unit 301 is configured to send, to the capacity station that belongs to the base station, a plurality of activation control information, where the multiple activation control information is used to enable the capacity station to send a pilot signal to the user in a power increasing manner; 303.
  • the receiving unit is configured to receive, by the user, a measurement result that is sent to the pilot signal, where the calculating unit is configured to determine, according to the measurement result of the pilot signal by the user, a capacity station that needs to be activated to meet the system requirement, and send the
  • the unit 301 sends activation information to the capacity station that needs to be activated, so that the capacity station that needs to be activated in the sleep state is converted into an active state, and works when the capacity station that needs to be activated determined by the coverage station sends the activation information.
  • the power of the pilot station to transmit the pilot signal.
  • the further sending unit 301 is further configured to send, to the capacity station, first activation control information, where the first activation control information is used to enable the capacity station to send a pilot signal to the user at a first transmit power; 303 is further configured to receive a first measurement result of the pilot signal by the user, where the calculating unit 305 determines, according to the first measurement result, a capacity station that needs to be activated to meet a system requirement, where the sending unit 301 is The capacity station that needs to be activated transmits activation information such that the capacity station that needs to be activated is activated to operate at the first transmission power.
  • the sending unit 301 is further configured to send second activation control information to the capacity station, where the second control information is used to make the The capacity station transmits a pilot signal to the user in the link state with the coverage station by using the second transmission power; the receiving unit 303 is further configured to receive the second measurement result of the pilot signal by the user, where the calculation unit 305 is Determining the need to be stimulated according to the second measurement result
  • the transmitting unit 301 transmits activation information to the capacity station that needs to be activated such that the capacity station that needs to be activated is activated and operates at the second transmission power.
  • the sending unit 301 is further configured to send configuration information to the home user, where the configuration information is used to enable the user to measure the received pilot signal and send back the measurement result.
  • the calculating unit 305 when determining, according to the first measurement result, the capacity station that needs to be activated to meet the system requirement, may include:
  • the M capacity stations are the capacity stations that need to be activated; otherwise, the capacity stations that need to be activated to meet the system requirements cannot be selected.
  • the method further includes: if there are M capacity stations, the current load amount of the coverage station is subtracted from the M-1 After the load of the capacity station is integrated to be greater than or equal to the second threshold and the current load amount of the capacity station is less than or equal to the second threshold after subtracting all the load amounts of the M capacity stations, the M capacity The station is the capacity station that needs to be activated.
  • Determining, by the calculating unit 305, the capacity station that needs to be activated according to the second measurement result includes: determining, according to the second measurement result sent by a user covered by each capacity station, a load amount borne by each capacity station; If there are Q capacity stations, the current load amount of the coverage station is subtracted from which the load of the Q-1 capacity stations is greater than or equal to the second threshold, or the current load amount of the capacity station is subtracted.
  • the Q load stations of the Q capacity stations are less than or equal to the second threshold, and the Q capacity stations are capacity stations that need to be activated; otherwise, they cannot be selected to be full. The capacity station that the system needs to activate.
  • the capacity station transmits the pilot signal in a power-increasing manner according to the indication of the coverage station, and the coverage station configures the user to perform measurement reporting on the pilot signal transmitted by the capacity station at different power levels, and performs measurement on the user.
  • the measurement results of each report are analyzed and processed, so that on the one hand, the coverage of the coverage station that can be absorbed after each capacity station is activated can be determined, and on the other hand, the possible user distribution after the activation of the capacity station can be known, and the information of the two aspects is combined.
  • the coverage station can greatly improve the decision accuracy of the capacity station activation, and activate the correct capacity station while avoiding the wrong capacity station being activated, thereby avoiding the waste of power and resources caused by the wrong activation of the capacity station and the user being Unnecessary mobility between the capacity station and the coverage station improves the overall energy savings of the network.
  • a person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本发明实施例提供了一种容量站激活，覆盖站向所述容量站发送激活控制信息，所述激活控制信息使得所述容量站以功率递增的方式向用户发送导频信号，并接收所述用户对所述导频信号的测量结果，根据所述测量结果确定满足系统需求所需要激活的容量站，并向所确定的需要激活的容量站发送激活信息,激活容量站。本发明实施例的容量站激活的方法与系统能够更准确的确定需要激活的容量站，并且能够控制激活的容量站的发送功率，降低整个系统的能耗。

Description

容量站激活的方法及无线通信装置与系统 技术领域
本发明实施例涉及通信技术， 尤其涉及基站设备激活与功率控制的方 法， 装置及无线通信系统。 背景技术
伴随着容量和数据率的飞速增长， 无线通信在能量消耗中扮演了越来越 重要的角色。 运营商为了解决高容量和高数据需求问题， 会在同一个区域内 部署多种接入技术的无线网络（ GERAN/UTRAN/EUTRAN ) 以及多种发送 功率等级的基站（ Macro/Micro/LPN ) , 使得实际的网络结构变得极为复杂。 高容量高数据率本身就要求基站具备较高的发送功率， 而大量存在的热点站 等低功耗节点无疑又加剧了能量消耗问题的严重性。 运营商在某一区域进行无线网络部署时，往往会在提供基本的网络覆盖 基础上，部署异制式或同制式异频点网络或者在热点区域部署容量站进行服 务升级和容量增强。 这里为便于描述， 我们统称提供基本网络覆盖的基站为 覆盖站， 而进行服务升级或容量增强且与覆盖站重叠覆盖的基站或热点站为 容量站。 当容量站负载较低时， 进入休眠状态进行节能， 而当覆盖站负载较 高时， 再将部分或全部处于休眠状态的容量站激活以分担负载。 实际上， 发 明人发现当覆盖站负载较高时， 其负载往往不是均勾分布在覆盖范围内的， 而是集中在某些区域， 此时只需要激活相应区域的容量站并让其工作在合适 的功率发送水平就可以迁出足够的负载， 使负载下降的合适的水平。 现有的 容量站激活方案在应用时可能会出现以下问题， 即多个容量站同时被激活并 工作在最大功率发送水平后，覆盖站负载可能会下降到极低的水平甚至处于 零负载状态， 实际上这不利于网络整体能效的提升。 发明内容
本发明实施例提供一种容量站激活的方法能够更准确的确定需要激活 的容量站， 并且能够控制激活的容量站的发送功率， 降低整个系统的能耗。
一种容量站激活的方法， 包括： 向容量站发送第一激活控制信息， 所述第一激活控制信息用于使得所述 容量站以第一发射功率向与覆盖站处于链接状态的用户发送导频信号，所述 容量站归属所述覆盖站； 接收所述用户对所述导频信号的第一测量结果，根据所述第一测量结果 确定满足系统需求所需要激活的容量站； 向所述需要激活的容量站发送激活信息使得所述需要激活的容量站被 激活后以所述第一发送功率工作；
如果根据所述第一测量结果不能选择出满足系统需求所需要激活的容 量站， 则向容量站发送第二激活控制信息， 所述第二控制信息用于使得所述 容量站以第二发射功率向与覆盖站处于链接状态的用户发送导频信号；接收 所述用户对所述导频信号的第二测量结果，根据所述第二测量结果确定所述 需要激活的容量站； 向所述需要激活的容量站发送激活信息使得所述需要激 活的容量站被激活后以所述第二发送功率工作；
其中所述第一控发送功率小于所述第二发送功率。 同时还进一步，提供了一种无线通信系统， 包括容量站和覆盖站,容量站 归属于覆盖站，所述容量站包括至少两级发送功率，
所述覆盖站用于用向所述容量站发送多个激活控制信息,所述多个激活 控制信息使得所述容量站以功率递增的方式向用户发送导频信号,并接收所 述用户对所述导频信号的测量结果，根据所述测量结果确定满足系统需求所 需要激活的容量站，并向所确定的需要激活的容量站发送激活信息；
所述容量站用于接收所述覆盖站的激活控制信息,以发送功率递增的方 式向用户发送导频信号,直到所述覆盖站确定满足系统需求所需要激活的容 量站,还用于在休眠状态时接收所述覆盖站发送的激活信息并变换为工作状 态,并且工作在所述覆盖站确定的需要激活的容量站发送激活信息时所述容 量站发送导频信号的功率。 进一步， 本发明实施例还给出一种无线通信基站， 包括: 发送单元， 用于能够向归属于该基站的容量站发送多个激活控制信息， 所述多个激活控制信息用于使得所述容量站以功率递增的方式向用户发送 导频信号； 接收单元， 用于接收所述用户发送对导频信号的测量结果；
计算单元， 用于根据所述用户发送对导频信号的测量结果确定满足系统 需求所需要激活的容量站， 并所述发送单元向所述需要激活的容量站发送激 活信息使得在休眠状态的所述需要激活的容量站变换为工作状态,并且工作 在所述覆盖站确定的需要激活的容量站发送激活信息时所述容量站发送导 频信号的功率。 在本发明的实施例中通过容量站以功率递增的方式发送导频信号进行 容量站激活， 并根据用户对导频信号的测量确定合适的发送功率， 使得容量 站在激活后可能工作在低于最大功率水平的某一合适的功率发射水平， 并保 证覆盖站负载下降到合适的水平。 同时， 这些激活但未满功率发送的容量站 还可以覆盖站负载进一步提高时，可以优先提升这些容量站的发射功率至最 大水平以进一步吸收负载。 附图说明 图 1为本发明实施例容量站激活的方法流程图。
图 2为本发明实施例无线通信系统示意图。 图 3为本发明实施例的基站结构示意图。 具体实施方式
在整个实施例中， 容量站在激活判决过程中采用至少两档导频发送功 率， 分别是 &。w和 Pmax, 其中 Pmax可以是热点站导频最大发送功率， &。w是 预设的低于 Pmax的某一功率水平。 应当注意的是， 在实际应用本方案时， 热 点站可以采用更多档次的导频发送功率， 其中最高等级的发送功率优选热点 站导频最大发送功率， 实施中容量站依次以递增的方三式调整导频发送功率 直到覆盖站确定合适的需要激活的容量站。
在下面的具体实施方式中,热点站为容量站,宏基站为覆盖站。 覆盖站和 容量站可以同制式也可以不同制式。
在实施例中， 负载是以连接态用户数这一典型因素来表示的， 即以连接 态用户数的多少来表示宏基站负载的变化情况以及热点站激活后可以吸收 的负载量。 应当注意的是， 本发明所述的技术方案同样适用于用空口资源占 用率等其他因素表示基站负载、 或者用连接态用户数、 空口资源占用率等任 意几种因素的组合共同表示负载的情形。
当覆盖站（例如， 宏基站）的负载大于第一阈值， 比如连接态用户数超 过预设门限第一阈值 cthrcsh。ld时， 其覆盖范围内所有处于休眠状态的容量站 的容量站组为 St。tal, 而其中有 N(N^ l)个处于休眠状态的容量站（比如， 热 点站）将参与激活判决， 分别为： ,¾,...,!¾, 并且以容量站组 S表示这些 将参与激活判决的热点站。 应当注意的是， S可以等于 St。tal, 也可以是 St。tal 的子集， 即宏基站可以让其覆盖范围内所有处于休眠状态的热点站都参与激 活判决， 也可以选择其覆盖范围内部分处于休眠状态的热点站参与激活判 决， 例如， 宏基站在执行热点站激活判决过程之前， 参考每个处于休眠状态 的热点站的长期负载统计信息，如果长期负载统计信息显示在接下来的时间 内， 某个热点站激活后将长时间的维持很低的负载水平， 或者仅能维持 4艮短 时间的中高负载， 那么宏基站将该热点站排除在容量站组 S之外。 宏基站覆 盖范围内处于休眠状态但不属于容量站组 S的热点站将维持休眠状态，不参 与激活判决。 这里的负载至少包含以下因素： 连接态用户数。 参阅图 1 , 本发明实施例容量站激活的方法流程图。 执行该方法的为覆 盖站或者 OAM (操作管理和维护模块)。下面以覆盖站或者 OAM处理为例进 行介绍。
S101 , 向容量站发送第一激活控制信息， 所述第一激活控制信息用于使 得所述容量站以第一发射功率向与覆盖站处于链接状态的用户发送导频信 号， 所述容量站归属所述覆盖站；
S102, 接收所述用户对所述导频信号的第一测量结果， 根据所述第一测 量结果确定满足系统需求所需要激活的容量站；
S103 向所述需要激活的容量站发送激活信息使得所述需要激活的容量 站被激活后以所述第一发送功率工作；
S104如果根据所述第一测量结果不能选择出满足系统需求所需要激活 的容量站， 则向容量站发送第二激活控制信息， 所述第二控制信息用于使得 所述容量站以第二发射功率向与覆盖站处于链接状态的用户发送导频信号； 接收所述用户对所述导频信号的第二测量结果，根据所述第二测量结果确定 所述需要激活的容量站； 向所述需要激活的容量站发送激活信息使得所述需 要激活的容量站被激活后以所述第二发送功率工作；
其中所述第一控发送功率小于所述第二发送功率。
进一步，如果根据所述第二测量结果不能选择出满足系统需求所需要激 活的容量站， 则向归属所述覆盖站的所有参与激活判决的容量站发送激活信 息并使激活后的容量站以其最大发送功率工作。
进一步可以根据第一测量结果和第二测量结果综合确定需要激活的容 量站,例如计算第一测量结果与第二测量结果的差值,根据所述差值确定所述 需要激活的容量站使得所述需要激活的容量站激活后用户位于小区中心。
进一步， 如果容量站有更多的发送功率等级， 则在覆盖站没有选择出合 适的需要激活的容量站的情况下， 依次调整导频信号的发送功率， 依次根据 用户对导频信号的测量结果进行需要激活容量站的选择直到确定出合适的 需要激活的容量站。 可以认为是在不同发送功率下对上述步骤的重复。 如果 各等级的发送功率均尝试后不能选择出满足系统需求所需要激活的容量站， 则向归属所述覆盖站的所有参与激活判决的容量站发送激活信息并使激活 后的容量站以其最大发送功率工作。
在本发明的实施例中通过容量站以功率递增的方式发送导频信号进行 容量站激活， 并根据用户对导频信号的测量确定合适的发送功率， 使得容量 站在激活后可能工作在低于最大功率水平的某一合适的功率发射水平， 并保 证覆盖站负载下降到合适的水平。 同时， 这些激活但未满功率发送的容量站 还可以覆盖站负载进一步提高时，可以优先提升这些容量站的发射功率至最 大水平以进一步吸收负载。
本发明实施例一介绍一种宏基站和热点站都是 EUTRAN基站的小区激 活方案。
步骤一： 当宏基站连接态用户数超过预设门限 cteesh。ld (第一阈值） 时， 宏基站通知容量站组 S中的热点站以 &。w的导频功率水平发送 T时间的导频 信号，还可以发送同步信号（热点站发送 T时间后停止发送，返回休眠状态 ), 并配置宏基站连接态用户对 S中热点站发送的导频信号进行测量上报。
步骤二： 宏基站根据用户上报的测量结果执行以下操作： 针对每个热点 站 , (i=l,2, .. .,N), 统计以该热点站为目标基站时， 满足切换条件并上报切 换事件的宏基站用户数目， 记为 cu, 并按照 cu由大到小的顺序对热点站 进行排序。 对于排序之后的热点站， 如果存在前 M(1≤M≤N)个热点站， 使得 宏基站当前连接态用户总数减去这 M个热点站对应的
Figure imgf000007_0001
. , .,Μ)总 和后刚好小于预设门限第二阈值 Cthrcsh。ld (即宏基站当前连接态用户总数减 去前 M-1个热点站对应的 d— 1总和后将大于预设门限 Cthrcsh。 i ),则将这 M 个热点站作为激活的备选热点站， 并以容量站组 swake— up— ( swake— up 是容量 站组 S的子集）表示， 转到步骤三； 如果 M选不出， 即宏基站当前连接态 用户总数减去容量站组 S 中所有热点站对应的 C^、和后仍大于预设门限
Cthreshoid_i , 则转到步骤七。
步骤三： 如果所选的 M个热点站中第 M个热点站对应的 Ci_M,l大于 预设门限第三阈值 Cteesh。ld 2, 则宏基站激活容量站组 Swake— up 中的热点站并 让其工作在 &。w的导频功率发射水平， 容量站组 S中的其他热点站继续保持 休眠状态， 转到步骤十一； 如果所选的 M个热点站中第 M个热点站对应的
C^M,!小于预设门限 Cthresh。ld 2, 则转到步骤四。
步骤四： 宏基站通知容量站组 Swake— up i中的热点站以 Pmax的导频功率水 平发送 T时间的导频信号以及同步信号（热点站发送 T时间后停止发送，返 回休眠状态 ),并配置宏基站连接态用户对 Swake— up— 中热点站发送的导频信号 进行测量上报， 转到步骤五。
步骤五： 宏基站根据用户上报的测量结果执行以下操作： 针对容量站组 Swake— up 中的每个热点站 , (i=l,2,...,M), 统计以该热点站为目标基站时， 满足切换条件并上报切换事件的宏基站用户数目， 记为 d,2, 并按照 d,2由 大到小的顺序对热点站进行排序。 对于排序之后的热点站， 如果存在前
W( 1≤W≤M)个热点站， 使得宏基站当前连接态用户总数减去这 W个热点站 对应的 —！！！^！^^ … ^总和后刚好小于预设门限第二阈值 Cthrcsh。ld ^即 宏基站当前连接态用户总数减去前 W-1个热点站对应的 m,,2总和后将大于 预设门限第二阈值 Cteesh。ld ) , 则将这 W个热点站作为激活的备选热点站， 并以容量站组 Swake— up— 2 ( Swake— up— 2是容量站组 S的子集 )表示， 转到步骤六； 如果 W选不出（即选从不出合适的 W ), 即宏基站当前连接态用户总数减去 容量站组 Swake— up i中所有热点站对应的 d,2总和后仍大于预设门限 Cteesh。 则转到步骤七。
步骤六： 宏基站激活容量站组 Swake— up 2中的热点站并让其工作在 Pmax的 导频功率发射水平， 容量站组 S中的其他热点站继续保持休眠状态， 转到步 骤十一。
步骤七：宏基站通知容量站组 S中的热点站以 Pmax的导频功率水平发送 T时间的导频信号以及同步信号（热点站发送 T时间后停止发送， 返回休眠 状态）， 并配置宏基站连接态用户对 S 中热点站发送的导频信号进行测量上 报， 转到步骤八。 步骤八： 宏基站根据用户上报的测量结果执行以下操作： 针对每个热点 站 , (i=l,2,...,N), 统计以该热点站为目标基站时， 满足切换条件并上报切 换事件的宏基站用户数目， 记为 d,3, 并按照 d,3由大到小的顺序对热点站 进行排序。 对于排序之后的热点站， 如果存在前 Q (1≤Q≤N)个热点站， 使得 宏基站当前连接态用户总数减去这 Q 个热点站对应的 m,,,3(m"=l,2,...,Q) 总和后刚好小于预设门限第二阈值 Cthrcsh。ld (即宏基站当前连接态用户总数 减去前 Q-1个热点站对应的 Ci— m",3总和后将大于预设门限 Cthrcsh。ld— i ) , 则 将这 Q个热点站作为激活的备选热点站， 并以容量站组 Swake— up— 3 ( Swake_up_3 是容量站组 S的子集）表示， 转到步骤九； 如果 Q选不出， 即宏基站当前连 接态用户总数减去容量站组 S中所有热点站对应的 d,3总和后仍大于预设门 限 Cteesh。ld 则转到步骤十。
步骤九： 宏基站激活容量站组 Swake— up 3中的热点站并让其工作在 Pmax的 导频功率发射水平， 容量站组 S中的其他热点站继续保持休眠状态， 转到步 骤十一。
步骤十：宏基站激活容量站组 S中的所有热点站并让其工作在 Pmax的导 频功率发射水平， 转到步骤十一。
步骤十一： 当宏基站连接态用户数进一步提高并超过预设门限第一阈值 cthrcsh。ld时，如果其覆盖范围内存在激活但未满功率发射的热点站， 则宏基站 通知这些激活但未满功率发射的热点站提高导频功率至最大发射水平； 如果 宏基站负载范围内所有已激活的热点站都工作在导频功率最大发射水平后， 宏基站连接态用户数仍高于第一阈值 cteesh。ld, 则宏基站重复步骤一到步骤 十， 执行热点站激活过程， 直到宏基站覆盖范围内所有热点站都处于激活状 态且工作在导频功率最大发射水平。
进一步， 如果热点站在激活判决过程中采用超过两档的导频发送功率， 则重复步骤一到步骤六。
进一步， 如果预设门限 Cthrcsh。ld 2很小或者为 0, 则宏基站选出备选热点 站容量站组后， 即激活容量站组中的所有热点站， 而不对热点站是否能够高 效吸收宏基站负载做检验。
进一步，在整个方案实施过程中，热点站仅发送导频信号和同步信号时， 宏基站不会将连接态用户切换到该热点站。 本发明实施例二公开了一种宏基站是 UTRAN基站、热点站是 EUTRAN 基站的小区激活方案。 宏基站提供基本的网络覆盖， 热点站部署在宏基站覆 盖范围内的热点站区域进行容量增强， 并完全被宏基站覆盖。 当部分或全部 热点站处于休眠状态且宏基站负载较高时， 可应用本发明所述技术方案进行 热点站激活。
本实施例中， 热点站在激活判决过程中采用两档导频发送功率， 分别是
Plc3W和 Pmax, 其中 &。w是预设的低于 Pmax的某一功率水平， Pmax可以是热点 站导频最大发送功率。
本实施例二方案主要步骤如下：
步骤一： 当 OAM检测到宏基站连接态用户数超过预设门限 Cthrcsh。ld时，
OAM通知容量站组 S中的热点站以 &。w的导频功率水平发送 T时间的导频 信号以及同步信号（热点站发送 T时间后停止发送， 返回休眠状态）， 并通 知宏基站；宏基站配置连接态用户对 S中热点站发送的导频信号进行测量上 报， 转到步骤二。
步骤二： OAM根据宏基站用户上报的测量结果执行以下操作： 针对每 个热点站 , (i=l,2,...,N), 统计以该热点站为目标基站时， 满足切换条件并 上报切换事件的宏基站用户数目， 记为 Cu, 并按照 Cu由大到小的顺序对 热点站进行排序。对于排序之后的热点站，如果存在前 M(1≤M≤N)个热点站， 使得宏基站当前连接态用户总数减去这 M个热点站对应的 d— ^(!!1=1,2,...,Μ) 总和后刚好小于预设门限（第二阈值 ) Cteesh。ld (即宏基站当前连接态用户 总数减去前 M-1个热点站对应的 d— 1总和后将大于预设门限 Cthrcsh。 i ),则 将这 M个热点站作为激活的备选热点站， 并以容量站组 Swake— up— ( Swake— up i 是容量站组 S的子集）表示， 转到步骤三； 如果 M选不出， 即宏基站当前 连接态用户总数减去容量站组 S中所有热点站对应的 Ci,l总和后仍大于预设 门限 Cteesh。 则转到步骤七。
步骤三： 如果所选的 M个热点站中第 M个热点站对应的 d— 大于预 设门限（第三阈值 ) Cthresh。ld 2, 则 OAM激活容量站组 Swake_up_l中的热点 站且让其工作在 Ptow的导频功率发射水平， 并将热点站的状态转换以及导频 功率信息通知宏基站， 容量站组 S中的其他热点站继续保持休眠状态， 转到 步骤十一； 如果所选的 M个热点站中第 M个热点站对应的 Ci_M,l小于预 设门限 Cteesh。ld 2, 则转到步骤四。
步骤四： OAM通知容量站组 Swake— up i中的热点站以 Pmax的导频功率水 平发送 T时间的导频信号以及同步信号（热点站发送 T时间后停止发送，返 回休眠状态）， 并通知宏基站； 宏基站配置连接态用户对 Swake— up 中热点站 发送的导频信号进行测量上报， 转到步骤五。
步骤五： OAM根据用户上报的测量结果执行以下操作： 针对每个热点 站 , (i=l,2,...,M), 统计以该热点站为目标基站时， 满足切换条件并上报切 换事件的宏基站用户数目， 记为 d,2, 并按照 d,2由大到小的顺序对热点站 进行排序。 对于排序之后的热点站， 如果存在前 W (1≤W≤M)个热点站， 使 得宏基站当前连接态用户总数减去这 W个热点站对应的 d— m,,2(m，=l,2，...,W) 总和后刚好小于预设门限 Cthrcsh。ld— i (即宏基站当前连接态用户总数减去前 W-1个热点站对应的 Ci— m,,2总和后将大于预设门限 Cteesh。ld 则将这 W个 热点站作为激活的备选热点站， 并以容量站组 Swake— up— 2 ( Swake— up 2是容量站 组 S的子集）表示， 转到步骤六； 如果 W选不出， 即宏基站当前连接态用 户总数减去容量站组 Swake— up i中所有热点站对应的 d,2总和后仍大于预设门 限 Cteesh。 则转到步骤七。
步骤六： OAM激活容量站组 Swake— up 2中的热点站并且其工作在 Pmax的 导频功率发射水平， 并将热点站的状态转换以及导频功率信息通知宏基站， 容量站组 S中的其他热点站继续保持休眠状态， 转到步骤十一。
步骤七： OAM通知容量站组 S中的热点站以 Pmax的导频功率水平发送 T时间的导频信号以及同步信号（热点站发送 T时间后停止发送， 返回休眠 状态）， 并通知宏基站； 宏基站配置连接态用户对 S 中热点站发送的导频信 号进行测量上报， 转到步骤八。
步骤八： OAM根据用户上报的测量结果执行以下操作： 针对每个热点 站 , (i=l,2,...,N), 统计以该热点站为目标基站时， 满足切换条件并上报切 换事件的宏基站用户数目， 记为 d,3, 并按照 d,3由大到小的顺序对热点站 进行排序。 对于排序之后的热点站， 如果存在前 Q (1≤Q≤N)个热点站， 使得 宏基站当前连接态用户总数减去这 Q个热点站对应的 Ci— m",3(m"=l,2, ...,Q) 总和后刚好小于预设门限 Cthrcsh。ld— i (即宏基站当前连接态用户总数减去前 Q-1个热点站对应的 Ci— m,,,3总和后将大于预设门限 Cteesh。ld ), 则将这 Q个 热点站作为激活的备选热点站， 并以容量站组 Swake— up— 3 ( Swake— up 3是容量站 组 S的子集）表示， 转到步骤九； 如果 Q选不出， 即宏基站当前连接态用户 总数减去容量站组 S 中所有热点站对应的 Ci,3 总和后仍大于预设门限
Cthreshoid_i , 则转到步骤十。
步骤九： OAM激活容量站组 Swake— up 3中的热点站且让其工作在 Pmax的 导频功率发射水平， 并将热点站的状态转换以及导频功率信息通知宏基站， 容量站组 S中的其他热点站继续保持休眠状态， 转到步骤十一。
步骤十： OAM激活容量站组 S中的热点站且让其工作在 Pmax的导频功 率发射水平， 并将热点站的状态转换以及导频功率信息通知宏基站， 转到步 骤十一。
步骤十一： 当宏基站连接态用户数进一步提高并超过预设门限 Cteesh。ld 时， 如果其覆盖范围内存在激活但未满功率发射的热点站， 则 OAM通知这 些激活但未满功率发射的热点站提高导频功率至最大发射水平， 并将热点站 导频功率信息通知宏基站； 如果宏基站覆盖范围内所有已激活的热点站都工 作在导频功率最大发射水平后， 宏基站的连接态用户数仍高于
Figure imgf000013_0001
则 OAM和宏基站重复步骤一到步骤十， 执行热点站激活过程， 直到宏基站覆 盖范围内所有热点站都处于激活状态且工作在导频功率最大发射水平。
应当注意的是，如果热点站在激活判决过程中采用超过两档的导频发送 功率， 则重复步骤一到步骤六。
还应当注意的是， 如果预设门限 Cthrcsh。ld 2很小或者为 0, 则 OAM选出 备选热点站容量站组后， 即激活容量站组中的所有热点站， 而不对热点站是 否能够高效吸收宏基站负载做检验。
还应当注意的是， 在整个方案实施过程中， 热点站仅发送导频信号和同 步信号时， 宏基站不会将连接态用户切换到该热点站。
本发明实施例三的网络场景如下： 频点 fl上的基站 A为某一区域提供 基本的网络覆盖， 频点 f2上的基站 B/C/D均与基站 A重叠覆盖， 基站 A和 基站 B/C/D可以是异制式基站，也可以是同制式异频点基站。基站 B/C/D中 的全部或部分基站为了节能而处于休眠状态， 当基站 A的负载较高时，可以 利用本发明所提技术方案激活基站 B/C/D 中全部或部分处于休眠状态的基 站，并使其工作在合适的导频发送功率水平同时保证基站 A的负载下降到合 适的水平。
假设当频点 fl 上的基站 A 的连接态用户数超过第一阈值， 预设门限 Cthresh。ld时， 频点 f2上所有与基站 A重叠覆盖且处于休眠状态的基站容量站 组为 St。tal, 而其中有 N(N^ l)个处于休眠状态的基站将参与激活判决， 分别 为： HI , H2,...,HN, 以容量站组 S表示这些将参与激活判决的频点 f2上的 基站。 应当注意的是， S可以等于 St。tal, 也可以是 St。ta 子集， 即 OAM可 以让频点 f2上所有与基站 A重叠覆盖且处于休眠状态的基站参与激活判决， 也可以预先根据某些算法仅选择频点 f2上与基站 A重叠覆盖且处于休眠状 态的部分基站参与激活判决， 例如， 在执行基站激活判决过程之前， 参考频 点 f2上每个与基站 A重叠覆盖且处于休眠状态的基站与基站 A重叠覆盖区 域的大小和位置，如果重叠覆盖的区域很小而且位于基站 A的边缘，那么将 该基站排除在容量站组 S之外。 频点 f2上与基站 A重叠覆盖且处于休眠状 态但不属于容量站组 S的基站将维持休眠状态， 不参与激活判决。 这里的负 载至少包含以下因素： 连接态用户数。
本实施例三主要步骤如下：
步骤一： 当 OAM检测到基站 A连接态用户数超过预设门限 Cthrcsh。ld时， OAM通知容量站组 S中的基站以 &。w的导频功率水平发送 T时间的导频信 号以及同步信号 （基站发送 T时间后停止发送， 返回休眠状态）， 并通知基 站 A;基站 A配置连接态用户对 S中基站发送的导频信号进行测量上报，转 到步骤二。
步骤二： OAM根据基站 A的用户上报的测量结果执行以下操作： 针对 容量站组 S中每个基站 , (i=l,2,...,N), 统计以该基站为目标基站时， 满足 切换条件并上报切换事件的基站 A的用户数目， 记为 Cu, 并按照 由大 到小的顺序对容量站组 S中的基站进行排序。 对于排序之后的基站， 如果存 在前 M(1≤M≤N)个基站， 使得基站 A当前连接态用户总数减去这 M个基站 对应的
Figure imgf000014_0001
, .,Μ)总和后刚好小于预设门限 Cthrcsh。ld 即基站 A当前 连接态用户总数减去前 M-1 个基站对应的 d— 1总和后将大于预设门限 Cthreshold.l 则将这 M个基站作为激活的备选基站， 并以容量站组 Swake— up— ( Swake_up_l是容量站组 S的子集 )表示， 转到步骤三； 如果 M选不出， 即基站 A当前连接态用户总数减去容量站组 S中所有基站对应的 Ci,l总和 后仍大于预设门限 Cthreshold_l , 则转到步骤四。
步骤三： 如果所选的 M个基站中第 M个基站对应的 Ci_M,l大于预设 门限 Cthreshold_2,则 OAM激活容量站组 Swake_up_l中的基站且让其工作 在 Plow的导频功率发射水平， 并将基站的状态转换以及导频功率信息通知 基站 A, 容量站组 S中的其他基站继续保持休眠状态， 转到步骤八； 如果所 选的 M个基站中第 M个基站对应的 Ci_M,l小于预设门限 Cthreshold_2, 则 转到步骤四。
步骤四： OAM通知容量站组 S中的基站以 Pmax的导频功率水平发送 T 时间的导频信号以及同步信号 （基站发送 T 时间后停止发送， 返回休眠状 态 ), 并通知基站 A; 基站 A配置连接态用户对 S中的基站发送的导频信号 进行测量上报， 转到步骤五。
步骤五： OAM根据用户上报的测量结果执行以下操作： 针对容量站组 S中的每个基站 Hi, (i=l,2,.. .,N), 统计以该基站为目标基站时， 满足切换条 件并上报切换事件的基站 A的用户数目， 记为 Ci,2, 并按照 Ci,2由大到小 的顺序对容量站组 S中的基站进行排序。 对于排序之后的基站， 如果存在前 W(1<W<N )个基站， 使得基站 A当前连接态用户总数减去这 W个基站站对 应的（ 1—111,,2(111，=1 ,2, .. .,\¥)总和后刚好小于预设门限( ^^。1(1—1 (即基站 A当前 连接态用户总数减去前 W-1 个基站对应的 m,,2总和后将大于预设门限 CteeshoMj ),则将这 W个基站作为激活的备选基站，并以容量站组 Swake_up_2 ( Swake— up 2是容量站组 S的子集）表示， 转到步骤六； 如果 W选不出， 即基 站 A当前连接态用户总数减去容量站组 S中所有基站对应的 Ci,2总和后仍 大于预设门限 Cthreshold_l , 则转到步骤七。
步骤六： OAM激活容量站组 Swake_up_2 中的基站并且其工作在 Pmax 的导频功率发射水平， 并将基站的状态转换以及导频功率信息通知基站 A, 转到步骤八。
步骤七： OAM激活容量站组 S中的基站且让其工作在 Pmax的导频功率 发射水平，并将基站的状态转换以及导频功率信息通知基站 A,转到步骤八。
步骤八： 当基站 A的连接态用户数进一步提高并超过预设门限 Cteesh。ld 时， 如果频点 f2上与基站 A重叠覆盖的基站中存在已激活但未满功率发送 的基站， 则 OAM通知这些激活但未满功率发射的基站提高导频功率至最大 发射水平， 并将基站导频功率信息通知基站 A; 如果频点 f2上与基站 A重 叠覆盖的所有已激活的基站均工作在导频功率最大发送水平时，基站 A的连 接态用户数仍高于 Cteesh。ld, 则 OAM重复步骤一到步骤七， 执行基站激活过 程， 直到频点 f2上与基站 A重叠覆盖的所有基站都处于激活状态且工作在 导频功率最大发送水平。
应当注意的是，如果基站在激活判决过程中采用超过两档的导频发送功 率， 则重复步骤一到步骤三。
还应当注意的是， 如果预设门限 Cthreshold_2很小或者为 0, 则 OAM 选出备选基站容量站组后， 即激活容量站组中的所有基站， 而不对基站是否 能够高效吸收基站 A的负载做检验。
还应当注意的是， 在整个方案实施过程中， 频点 f2上的基站仅发送导 频信号和同步信号时， 基站 A不会将连接态用户切换到该基站。 本发明所述技术方案适用于网络场景： 频点 fl上的基站 A为某一区域 提供基本的网络覆盖， 频点 f2上的基站 B与基站 A共站址且重叠覆盖， 基 站 A和 B可以是异制式基站， 也可以是同制式异频点基站。 基站 B为了节 能而处于休眠状态， 当基站 A的负载较高时， 可以利用本发明所提技术方案 激活基站 B, 使基站 B工作在合适的导频发送功率水平同时保证基站 A的 负载下降到合适的水平。
本发明技术方案主要步骤如下：
步骤一： 当 OAM检测到基站 A负载超过预设门限 Cthrcsh。ld时， OAM激 活基站 B且让其工作在 PlQW的导频功率发送水平，并将基站 B的状态转换和 导频功率信息通知基站 A, 转到步骤二。
步骤二： 基站 A转移部分负载到基站 B, 使基站 A的负载低于预设门 限 Cteesh。ld , 且基站 B的负载低于预设门限 Cthrcsh。ld , 转到步骤三。
步骤三： 如果基站 Α的负载进一步上升， 并超过预设门限 Cteesh。ld, 且 基站 B的负载超过预设门限 Cteesh。ld— , OAM通知基站 B提升导频发送功率 至 Pmax水平， 并将基站 Β的导频功率信息通知基站 Α。
应当注意的是， 如果基站 Β 在激活过程中采用超过两档的导频发送功 率， 则重复步骤一到步骤三。 本发明实施例五的网络场景， 宏基站提供基本的网络覆盖， 即覆盖站， 热点站部署在宏基站覆盖范围内的热点站区域进行容量增强， 即为容量站， 并完全被宏基站覆盖。 当部分或全部热点站处于休眠状态且宏基站负载较高 时， 可应用本发明所述技术方案进行热点站激活。 这里的宏基站和热点站可 以同制式也可以不同制式。
本实施例中， 热点站在激活判决过程中采用 Ν(Ν>1)个等级的导频发射 功率（或者表述为 Ν档的导频发射功率，一个发射功率为一档的发射功率）： 0<P1<P2< -.. <PN=Pmax, 其中 Pmax是热点站导频最大发送功率。
本发明所述技术方案主要步骤如下：
步骤一： 宏基站或 OAM 确定参与激活判决的容量站， 以容量站组 S0 表示（ S可以是宏基站覆盖范围内所有处于休眠状态的容量站的容量站组， 也可以是上述容量站组的子集）， 初始化 n = l , 转到步骤二。
其中步骤一是可选的， 例如默认所有处于休眠状态的容量站为需要参与 激活判断的容量站， 还可以是宏基站或 OAM在执行容量站激活判决过程之 前， 参考每个处于休眠状态的容量站的长期负载统计信息， 如果长期负载统 计信息显示在接下来的时间内， 某个容量站激活后将长时间的维持 4艮低的负 载水平， 或者仅能维持很短时间的中高负载， 那么宏基站将该容量站排除在 容量站组 S之外。宏基站覆盖范围内处于休眠状态但不属于容量站组 S的容 量站将维持休眠状态， 不参与激活判决。
步骤二： 如果 n < N, 则初始化 m = l , 宏基站或 OAM通知容量站组 S0 中的容量站以 Pn的导频功率水平发送导频信号以及同步信号，并配置宏基站 用户对 S。中容量站发送的导频信号进行测量，并上报测量结果，转到步骤三； 如果 n=N, 转到步骤七。
步骤三： 宏基站或 OAM接收各用户发送的测量结果， 根据宏基站用户 上报的测量结果和预设算法选出候选容量站组 Sm ( 8„1是 Sm4的子集）。 如果 根据预设算法选不出候选容量站组 Sm, 则 n = n+l , 返回步骤二； 如果容量 站组 Sm存在且 m < N, 转到步骤四； 如果容量站组 Sm存在且 m = N, 转到 步骤五。
步骤四：如果容量站组 Sm中的每个容量站工作在 Pm+n4的导频功率水平 都能高效的承担宏基站负载， 即满足系统优化需求， 合理吸收宏基站负载， 则宏基站或 OAM激活容量站组 Sm中的所有容量站， 并让其工作在 的 导频功率发送水平， 转到步骤八； 否则 m = m+l , 转到步骤六：
步骤五：宏基站或 OAM激活容量站组 Sm中的所有容量站，并让其工作 在 Pm+n4的导频功率发送水平， 转到步骤八。
步骤六： 宏基站或 OAM通知容量站组 Sm4中的容量站以 Pm+n4的导频 功率水平发送导频信号以及同步信号， 并配置宏基站用户对 Sm4中容量站发 送的导频信号进行测量上报， 返回步骤三。
步骤七： 宏基站或 OAM通知容量站组 S。中的容量站以 PN的导频功率 水平发送导频信号以及同步信号，并配置宏基站用户对 S。中容量站发送的导 频信号进行测量上报。 宏基站或 OAM根据宏基站用户上报的测量结果和预 设算法选出候选容量站组 Si ( 81是8。的子集）。 如果容量站组 Si存在， 则宏 基站或 OAM激活中 Si中的所有容量站， 并让其工作在 PN的导频功率发送 水平， 转到步骤八； 否则， 宏基站或 OAM激活中 S。中的所有容量站， 并让 其工作在 PN的导频功率发送水平， 转到步骤八。
步骤八： 当宏基站负载进一步提高并超过预设门限时， 如果其覆盖范围 内存在激活但未满功率发射的容量站， 则宏基站或 OAM通知这些激活但未 满功率发射的容量站提高导频功率至最大发射水平； 如果宏基站负载范围内 所有已激活的容量站都工作在导频功率最大发射水平后，宏基站负载仍高于 预设门限， 则宏基站或 OAM重复步骤一到步骤七， 执行容量站激活过程， 直到宏基站覆盖范围内所有容量站都处于激活状态且工作在导频功率最大 发射水平。
应当注意的是， 在上述过程中， 当宏基站或 OAM根据宏基站用户上报 的测量结果和预设算法选出候选容量站组 Si ( Si是 S0的子集 )后， 也可以 不对容量站组 S1 中容量站 7 担负载的高效性#文检验， 而直接激活容量站组 S1 中所有的容量站并让其工作在当前导频功率发送水平， 即可以在上述所 有步骤中去掉步骤四和步骤六， 使该技术方案的主要步骤筒化如下：
步骤一： 宏基站或 OAM 筛选参与激活判决的容量站， 以容量站组 S0 表示（ S。可以是宏基站覆盖范围内所有处于休眠状态的容量站的容量站组， 也可以是上述容量站组的子集）， 初始化 n = l , 转到步骤二。 在具体实施中， 步骤一是可选的， 比如默认所有的容量站为需要参与判决的容量站， 则即默 认所有的容量站组成第一容量站组 S0
步骤二： 如果 n < N, 则宏基站或 OAM通知容量站组 S。中的容量站以 Pn的导频功率水平发送导频信号以及同步信号， 并配置宏基站用户对 S0中 容量站发送的导频信号进行测量上报，转到步骤三；如果 n=N,转到步骤五。
步骤三： 宏基站或 OAM根据宏基站用户上报的测量结果和预设算法选 出候选容量站组 Si ( 81是80的子集）。 如果根据预设算法选不出候选容量站 组 Sl 则 n = n+l , 返回步骤二； 如果根据预设算法选出满足系统需求的候 选容量站组 Sl 转到步骤四。
步骤四： 宏基站或 OAM激活容量站组 Si中的所有容量站， 并让其工作 在 P 导频功率发送水平， 转到步骤六。
步骤五： 宏基站或 OAM通知容量站组 S。中的容量站以 PN的导频功率 水平发送导频信号以及同步信号，并配置宏基站用户对 S。中容量站发送的导 频信号进行测量上报。 宏基站或 OAM根据宏基站用户上报的测量结果和预 设算法选出候选容量站组 Si ( 81是8。的子集）。 如果容量站组 Si存在， 则宏 基站或 OAM激活中 Si中的所有容量站， 并让其工作在 Pr^ 导频功率发送 水平， 转到步骤六； 否则， 宏基站或 OAM激活中 S。中的所有容量站， 并让 其工作在 的导频功率发送水平， 转到步骤六。
步骤六： 当宏基站负载进一步提高并超过预设门限时， 如果其覆盖范围 内存在激活但未满功率发射的容量站， 则宏基站或 OAM通知这些激活但未 满功率发射的容量站提高导频功率至最大发射水平； 如果宏基站负载范围内 所有已激活的容量站都工作在导频功率最大发射水平后，宏基站负载仍高于 预设门限， 则宏基站或 OAM重复步骤一到步骤七， 执行容量站激活过程， 直到宏基站覆盖范围内所有容量站都处于激活状态且工作在导频功率最大 发射水平。
上述两个完整步骤中， 宏基站或 OAM根据宏基站用户上报的测量结果 和预设算法选出候选容量站组， 这里的预设算法包括：
宏基站或 OAM统计各容量站以当前功率发送导频时可吸收的宏基站负 载情况， 按照从大到小的顺序对容量站进行排序， 并选出前几个或多个容量 站作为候选容量站组，使得该容量站组中所有容量站承担负载后刚好使宏基 站负载下降到合适的水平。
或者， 宏基站或 OAM结合每个容量站以当前功率发送导频时可吸收的 负载量、 以上一功率等级发送导频时可吸收的负载量以及两者之间的差值， 选出候选容量站组。 例如， 根据每个容量站以当前功率发送导频时可吸收的 负载量是否超过某一预设门限粗选出部分容量站， 作为粗选容量站组， 再根 据每个容量站以当前功率发送导频时可吸收的负载量与以上一功率等级发 送导频时可吸收的负载量之间的差值从粗选容量站组中精选出候选容量站 组，使得候选容量站组中所有容量站承担负载后刚好使宏基站负载下降到合 适的水平。
应当注意的是， 在整个方案实施过程中， 容量站仅发送导频信号和同步 信号时， 宏基站不会将连接态用户切换到该容量站。 上述各实施例中， 容量站按照覆盖站或 OAM的指示以功率递增的方式 发送导频信号，覆盖站配置用户对容量站以不同功率水平发送的导频信号进 行测量上报， 并对用户每次上报的测量结果进行分析处理， 这样一方面可以 确定每个容量站激活后能够吸收的覆盖站负载量， 另一方面可以获知容量站 激活后可能的用户分布情况， 结合这两方面的信息， 覆盖站或 OAM可以在 很大程度上提高容量站激活的判决精度，在激活正确容量站的同时避免错误 的容量站被激活，从而避免了容量站因错误激活造成的功率和资源的浪费以 及用户在容量站和覆盖站之间不必要的移动性， 提高了网络的整体节能效 果。
同时本发明实施例还提供实现上述方法的装置系统， 用于完成上述方 法。 在装置与系统的实施例中， 其可以完成的方法如前所述。 如图 2所示， 一种无线通信系统示意图， 包括容量站和覆盖站，容量站归 属于覆盖站,所述容量站包括至少两级发送功率。 图 2中， （a)所示的为异制 式或同制式异频点的基站 B/C/D与基站 A重叠覆盖， （b)所示的为异制式或 同制式异频点的基站 E与基站 A共站址， 频点 fl上的基站 A为某一区域提 供基本的网络覆盖即为覆盖站， 频点 f2上的基站 E则为容量站。 对于图 2 中 （a ) ( b ), A为覆盖站， B/C/D/E各为容量站。 （C ) 中的宏基站提供基本 网络覆盖的基站， 为覆盖站， 而热点站提供服务升级或容量增强且与覆盖站 重叠覆盖， 为容量站。 覆盖站用于用向所述容量站发送多个激活控制信息,所述多个激活控制 信息使得所述容量站以功率递增的方式向用户发送导频信号,并接收所述用 户对所述导频信号的测量结果,根据所述测量结果确定满足系统需求所需要 激活的容量站，并向所确定的需要激活的容量站发送激活信息；
容量站用于接收所述覆盖站的激活控制信息 ,以发送功率递增的方式向 用户发送导频信号,直到所述覆盖站确定满足系统需求所需要激活的容量站, 还用于在休眠状态时接收所述覆盖站发送的激活信息并变换为工作状态,并 且工作在所述覆盖站确定的需要激活的容量站发送激活信息时所述容量站 发送导频信号的功率。
进一步， 本发明实施例提供一种基站， 该基站作为覆盖站， 其能够实施 上述方法实施例中的覆盖站的处理，具体的处理流程则为上述方法实施例中 的描述。 参阅图 3 , 本发明实施例的基站 30结构示意图。 发送单元 301 , 用于能够向归属于该基站的容量站发送多个激活控制信 息， 所述多个激活控制信息用于使得所述容量站以功率递增的方式向用户发 送导频信号； 接收单元 303 , 用于接收所述用户发送对导频信号的测量结果； 计算单元 305 , 用于根据所述用户发送对导频信号的测量结果确定满足 系统需求所需要激活的容量站， 并所述发送单元 301向所述需要激活的容量 站发送激活信息使得在休眠状态的所述需要激活的容量站变换为工作状态, 并且工作在所述覆盖站确定的需要激活的容量站发送激活信息时所述容量 站发送导频信号的功率。 进一步发送单元 301还用于向容量站发送第一激活控制信息，所述第一 激活控制信息用于使得所述容量站以第一发射功率向所述用户发送导频信 号； 则所述接收单元 303还用于接收所述用户对所述导频信号的第一测量结 果， 所述计算单元 305根据所述第一测量结果确定满足系统需求所需要激活 的容量站， 所述发送单元 301向所述需要激活的容量站发送激活信息使得所 述需要激活的容量站被激活后以所述第一发送功率工作。
如果根据所述第一测量结果不能选择出满足系统需求所需要激活的容 量站， 则所述发送单元 301还用于向容量站发送第二激活控制信息， 所述第 二控制信息用于使得所述容量站以第二发射功率向与覆盖站处于链接状态 的用户发送导频信号；接收单元 303还用于接收所述用户对所述导频信号的 第二测量结果，所述计算单元 305则根据所述第二测量结果确定所述需要激 活的容量站； 所述发送单元 301向所述需要激活的容量站发送激活信息使得 所述需要激活的容量站被激活后以所述第二发送功率工作。
进一步， 发送单元 301还用于向归属用户发送配置信息， 所述配置信息 用于使得所述用户能够对接收到的导频信号进行测量并发送回测量结果。
其中，计算单元 305根据所述第一测量结果确定满足系统需求所需要激 活的容量站时可以包括：
根据每一个容量站覆盖的用户发送的所述第一测量结果，确定每一个容 量站所承担的负载量； 如果存在 M个容量站， 使得所述容量站当前的负载量减去所述 M个容 量站的所有负载量后小于或等于所述第二阈值， 则所述 M 个容量站为所需 要激活的容量站； 否则为不能选择出满足系统需求所需要激活的容量站。
进一步，计算单元 305根据所述第一测量结果确定满足系统需求所需要 激活的容量站时还包括 如果存在 M个容量站，使得所述覆盖站的当前负载量减去其中 M-1个 所述容量站的负载综合后大于或等于第二阈值并且使得所述容量站当前的 负载量减去所述 M 个容量站的所有负载量后小于或等于所述第二阈值， 则 所述 M个容量站为所需要激活的容量站。 计算单元 305根据所述第二测量结果确定所述需要激活的容量站包括时 包括： 根据每一个容量站覆盖的用户发送的所述第二测量结果， 确定每一个 容量站所承担的负载量； 如果存在 Q个容量站，使得所述覆盖站的当前负载 量减去其中 Q-1 个所述容量站的负载综合后大于或等于第二阈值，或者使得 所述容量站当前的负载量减去所述 Q 个容量站的所有负载量后小于或等于 所述第二阈值所述 Q个容量站为所需要激活的容量站;否则为不能选择出满 足系统需求所需要激活的容量站。
上述实施例中，在无线通信系统中容量站按照覆盖站的指示以功率递增 的方式发送导频信号，覆盖站配置用户对容量站以不同功率水平发送的导频 信号进行测量上报， 并对用户每次上报的测量结果进行分析处理， 这样一方 面可以确定每个容量站激活后能够吸收的覆盖站负载量， 另一方面可以获知 容量站激活后可能的用户分布情况， 结合这两方面的信息， 覆盖站可以在很 大程度上提高容量站激活的判决精度，在激活正确容量站的同时避免错误的 容量站被激活，从而避免了容量站因错误激活造成的功率和资源的浪费以及 用户在容量站和覆盖站之间不必要的移动性， 提高了网络的整体节能效果。 本领域普通技术人员可以理解： 实现上述方法实施例的全部或部分步骤 可以通过程序指令相关的硬件来完成， 前述的程序可以存储于一计算机可读 取存储介质中， 该程序在执行时， 执行包括上述方法实施例的步骤； 而前述 的存储介质包括： ROM、 RAM, 磁碟或者光盘等各种可以存储程序代码的 介质。

Claims

权利要求
1、 一种容量站激活的方法， 其特征在于， 所述方法包括： 向容量站发送第一激活控制信息， 所述第一激活控制信息用于使得所述 容量站以第一发射功率向与覆盖站处于链接状态的用户发送导频信号，所述 容量站归属所述覆盖站；
接收所述用户对所述导频信号的第一测量结果，根据所述第一测量结果 确定满足系统需求所需要激活的容量站； 向所述需要激活的容量站发送激活信息使得所述需要激活的容量站被 激活后以所述第一发送功率工作； 如果根据所述第一测量结果不能选择出满足系统需求所需要激活的容 量站， 则向容量站发送第二激活控制信息， 所述第二控制信息用于使得所述 容量站以第二发射功率向与覆盖站处于链接状态的用户发送导频信号；接收 所述用户对所述导频信号的第二测量结果，根据所述第二测量结果确定所述 需要激活的容量站； 向所述需要激活的容量站发送激活信息使得所述需要激 活的容量站被激活后以所述第二发送功率工作； 其中所述第一发送功率小于所述第二发送功率。
2、 根据权利要求 1所述的方法， 其特征在于， 还包括： 判断所述覆盖 站的负载量， 当所述覆盖站的负载量大于一阈值时， 则向所述容量站发送第 一激活控制信息，其中所述容量站为归属所述覆盖站且处于休眠状态的容量 站。
3、 根据权利要求 1所述的方法， 其特征在于， 向容量站发送第一激活 控制信息还包括： 在归属所述覆盖站的容量站中，根据历史负载信息选择参与激活判断的 候选容量站； 则所述向容量站发送第一激活控制信息中所述容量站为参与激活判断 的候选容量站。
4、 根据权利要求 1或 2或 3所述的方法， 其特征在于， 如果根据所述 第二测量结果不能选择出满足系统需求所需要激活的容量站， 则向归属所述 覆盖站的容量站发送激活信息并使激活后的容量站以其最大发送功率工作。
5、 根据权利要求 1或 2或 3所述的方法， 其特征在于， 所述向归属所 述覆盖站或者通过所述容量站归属所述覆盖站用户发送配置信息， 所述配置 信息用于使得所述用户能够对接收到的导频信号进行测量及向所述覆盖站 发送测量结果。
6、 根据权利要求 1或 2或 3所述的方法， 其特征在于， 所述第二发送 功率为所述容量站的最大发送功率。
7、 根据权利要求 2或 3所述的方法， 其特征在于， 接收所述用户对所 述导频信号的第一测量结果，根据所述第一测量结果确定满足系统需求所需 要激活的容量站： 接收每一个容量站覆盖的用户发送的所述第一测量结果，确定每一个容 量站所承担的负载量； 如果存在 M个容量站， 使得所述容量站当前的负载量减去所述 M个容 量站的所有负载量后小于或等于所述第二阈值， 则所述 M 个容量站为所需 要激活的容量站； 否则为不能选择出满足系统需求所需要激活的容量站。
8、 根据权利要求 7所述的方法,其特征在于,所述所述方法还包括 如果存在 M个容量站，使得所述覆盖站的当前负载量减去其中 M-1个 所述容量站的负载综合后大于或等于第二阈值并且使得所述容量站当前的 负载量减去所述 M 个容量站的所有负载量后小于或等于所述第二阈值， 则 所述 M个容量站为所需要激活的容量站。
9、 根据权利要求 7所述的方法， 其特征在于， 所述方法还进一步包括： 如果所述 M个容量站中， 负载量最小的所述容量站的负载量小于第三阈值 时， 则向需要激活的容量站发送所述第二激活控制信息， 所述第二控制信息 用于使得所述需要激活的容量站以第二发射功率向与覆盖站处于链接状态 的用户发送导频信号； 接收所述用户对所述导频信号的第二测量结果， 如果 在 M个所述需要激活的容量站中存在 W个容量站， 使得使得所述覆盖站的 当前负载量减去其中 W-1 个所述容量站的负载综合后大于或等于所述第二 阈值， 则所述 W个容量站为最终所需要激活的容量站， 其中 1 ^W^M。
10、 根据权利要求 1或 2或 3的方法， 其特征在于， 所述接收所述用户 对所述导频信号的第二测量结果，根据所述第二测量结果确定所述需要激活 的容量站包括：
接收每一个容量站覆盖的用户发送的所述第二测量结果，确定每一个容 量站所承担的负载量； 如果存在 Q个容量站，使得所述覆盖站的当前负载量减去其中 Q-1个所 述容量站的负载综合后大于或等于第二阈值,或者使得所述容量站当前的负 载量减去所述 Q个容量站的所有负载量后小于或等于所述第二阈值所述 Q 个容量站为所需要激活的容量站； 否则为不能选择出满足系统需求所需要激活的容量站。
11、 根据权利要求 1或 2或 3所述的方法,其特征在于,根据所述第二测 量结果确定所述需要激活的容量站还包括： 根据所述第一测量结果和第二测量结果确定需要激活的容量站； 则根据所述第一测量结果和第二测量结果确定需要激活的容量站具体 包括:计算第一测量结果与第二测量结果的差值,根据所述差值确定所述需要 激活的容量站使得所述需要激活的容量站激活后用户位于小区中心.
12、 根据权利要求 2所述的方法,其特征在于,所述负载量包括通过计算 连接状态用户数， 或者计算空口资源占用率确定。
13、 根据权利要求 1所述的方法,其特征在于,确定所需要激活的容量站 之后还包括：
操作管理和维护模块向所述覆盖站发送所述需要激活的容量站的状态 转换信息及导频功率信息。
14、一种无线通信系统， 包括容量站和覆盖站,其特征在于,所述容量站归 属于所述覆盖站,所述容量站包括至少两级发送功率， 所述覆盖站用于向所述容量站发送多个激活控制信息,所述多个激活控 制信息使得所述容量站以功率递增的方式向用户发送导频信号，并接收所述 用户对所述导频信号的测量结果,根据所述测量结果确定满足系统需求所需 要激活的容量站,并向所确定的需要激活的容量站发送激活信息； 所述容量站用于接收所述覆盖站的激活控制信息,以发送功率递增的方 式向用户发送导频信号,直到所述覆盖站确定满足系统需求所需要激活的容 量站,还用于在休眠状态时接收所述覆盖站发送的激活信息并变换为工作状 态,并且工作在所述覆盖站确定的需要激活的容量站发送激活信息时所述容 量站发送导频信号的功率。
15、根据权利要求 14所述的系统,其特征在于,所述覆盖站用于向所述容 量站发送激活控制信息,并接收所述用户对所述导频信号的测量结果,根据所 述测量结果确定满足系统需求所需要激活的容量站时， 所述覆盖站向容量站发送第一激活控制信息，所述第一激活控制信息用 于使得所述容量站以第一发射功率向与覆盖站处于链接状态的用户发送导 频信号， 所述容量站归属所述覆盖站； 所述覆盖站接收所述用户对所述导频信号的第一测量结果，根据所述第 一测量结果确定满足系统需求所需要激活的容量站； 所述覆盖站向所述需要激活的容量站发送激活信息使得所述需要激活 的容量站被激活后以所述第一发送功率工作；
如果根据所述第一测量结果不能选择出满足系统需求所需要激活的容 量站， 则所述覆盖站向容量站发送第二激活控制信息， 所述第二控制信息用 于使得所述容量站以第二发射功率向与覆盖站处于链接状态的用户发送导 频信号； 所述覆盖站接收所述用户对所述导频信号的第二测量结果， 所述覆 盖站根据所述第二测量结果确定所述需要激活的容量站； 所述覆盖站向所述 需要激活的容量站发送激活信息使得所述需要激活的容量站被激活后以所 述第二发送功率工作；
其中所述第一发送功率小于所述第二发送功率。
16、 一种无线通信基站， 其特征在于， 所述基站包括： 发送单元， 用于能够向归属于该基站的容量站发送多个激活控制信息， 所述多个激活控制信息用于使得所述容量站以功率递增的方式向用户发送 导频信号；
接收单元， 用于接收所述用户发送对导频信号的测量结果； 计算单元， 用于根据所述用户发送对导频信号的测量结果确定满足系统 需求所需要激活的容量站， 并所述发送单元向所述需要激活的容量站发送激 活信息使得在休眠状态的所述需要激活的容量站变换为工作状态,并且工作 在所述覆盖站确定的需要激活的容量站发送激活信息时所述容量站发送导 频信号的功率。
17、 根据权利要求 16所述的基站， 其特征在于所述发送单元具体用于 向容量站发送第一激活控制信息，所述第一激活控制信息用于使得所述容量 站以第一发射功率向所述用户发送导频信号； 则所述接收单元还用于接收所述用户对所述导频信号的第一测量结果， 所述计算单元根据所述第一测量结果确定满足系统需求所需要激活的容量 站， 所述发送单元向所述需要激活的容量站发送激活信息使得所述需要激活 的容量站被激活后以所述第一发送功率工作。
18、 根据权利要求 17所述的基站， 其特征在于， 如果根据所述第一测 量结果不能选择出满足系统需求所需要激活的容量站， 则所述发送单元还用于向容量站发送第二激活控制信息， 所述第二控制 信息用于使得所述容量站以第二发射功率向与覆盖站处于链接状态的用户 发送导频信号； 所述接收单元还用于接收所述用户对所述导频信号的第二测量结果， 所 述计算单元则根据所述第二测量结果确定所述需要激活的容量站； 所述发送 单元向所述需要激活的容量站发送激活信息使得所述需要激活的容量站被 激活后以所述第二发送功率工作。
19、 根据权利要求 18所述的方法， 其特征在于， 所述发送单元还用于 向归属用户发送配置信息，所述配置信息用于使得所述用户能够对接收到的 导频信号进行测量并发送回测量结果。
20、 根据权利要求 17所述的基站， 其特征在于， 所述计算单元根据所 述第一测量结果确定满足系统需求所需要激活的容量站时包括： 根据每一个容量站覆盖的用户发送的所述第一测量结果，确定每一个容 量站所承担的负载量； 如果存在 M个容量站， 使得所述容量站当前的负载量减去所述 M个容 量站的所有负载量后小于或等于所述第二阈值， 则所述 M 个容量站为所需 要激活的容量站； 否则为不能选择出满足系统需求所需要激活的容量站。
21、 根据权利要求 20所述的基站， 其特征在于， 所述计算单元根据所 述第一测量结果确定满足系统需求所需要激活的容量站时还包括
如果存在 M个容量站，使得所述覆盖站的当前负载量减去其中 M-1个 所述容量站的负载综合后大于或等于第二阈值并且使得所述容量站当前的 负载量减去所述 M 个容量站的所有负载量后小于或等于所述第二阈值， 则 所述 M个容量站为所需要激活的容量站。
22、 根据权利要求 18所述的基站， 其特征在于， 所述计算单元根据所 述第二测量结果确定所述需要激活的容量站包括时包括： 根据每一个容量站覆盖的用户发送的所述第二测量结果，确定每一个容 量站所承担的负载量；
如果存在 Q个容量站，使得所述覆盖站的当前负载量减去其中 Q-1个所 述容量站的负载综合后大于或等于第二阈值,或者使得所述容量站当前的负 载量减去所述 Q个容量站的所有负载量后小于或等于所述第二阈值所述 Q 个容量站为所需要激活的容量站；
否则为不能选择出满足系统需求所需要激活的容量站。
PCT/CN2012/072995 2011-04-29 2012-03-26 容量站激活的方法及无线通信装置与系统 WO2012146109A1 (zh)

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