WO2012019556A1 - 一种节能补偿方法及基站 - Google Patents

一种节能补偿方法及基站 Download PDF

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Publication number
WO2012019556A1
WO2012019556A1 PCT/CN2011/078321 CN2011078321W WO2012019556A1 WO 2012019556 A1 WO2012019556 A1 WO 2012019556A1 CN 2011078321 W CN2011078321 W CN 2011078321W WO 2012019556 A1 WO2012019556 A1 WO 2012019556A1
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WO
WIPO (PCT)
Prior art keywords
energy
saving
base station
cell
activation
Prior art date
Application number
PCT/CN2011/078321
Other languages
English (en)
French (fr)
Inventor
张大钧
谌丽
Original Assignee
电信科学技术研究院
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.)
Filing date
Publication date
Application filed by 电信科学技术研究院 filed Critical 电信科学技术研究院
Priority to US13/700,717 priority Critical patent/US8543116B2/en
Priority to EP11816114.0A priority patent/EP2566258A4/en
Publication of WO2012019556A1 publication Critical patent/WO2012019556A1/zh
Priority to US13/973,702 priority patent/US9503972B2/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
    • H04W52/0203—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
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • 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
    • 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
    • H04W52/0251—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity
    • H04W52/0258—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity controlling an operation mode according to history or models of usage information, e.g. activity schedule or time of day
    • 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
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • 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
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • 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 wireless communication technologies, and in particular, to an energy saving compensation method and a base station. Background technique
  • Energy-saving technologies help improve our environment while conserving resources and bringing cost gains.
  • there are several ways to save energy in a mobile communication network 1) Optimize the number of base station sites under the premise of ensuring that coverage, capacity, and service shield are not affected; 2) Find effective energy utilization and reduce equipment. The method of power consumption; 3) Research and development of sustainable energy sources such as wind energy and solar energy.
  • ESM Energy Savings Management
  • energy-saving entities can be roughly divided into three structures: Distributed architecture, network elements collect necessary information for self-optimization, and do not require OAM (Operation Administration and Maintenance) participation; In the architecture, the OAM collects information from the network element to trigger the energy-saving algorithm, and then determines the subsequent actions of the network element.
  • OAM Operaation Administration and Maintenance
  • the hybrid structure uses the above two methods in combination.
  • Energy-saving actions include: turning off/on the cell; turning off/on the carrier; turning the transceiver on/off; turning off/on He B and others.
  • FIG. 1 is a structural diagram of a different system network in which an LTE system and an LTE-A system coexist, and a user equipment UE, a radio access network, and a CN (Core Network) constitute an entire heterogeneous system network structure, and the UE supports LTE.
  • LTE Long Term Evolution, Long Term Evolution
  • - Uu interface communicates with the evolved base station eNB, and communicates with the base station NodeB through the UTRAN-Uu interface, and through the GERAN (GSM EDGE Radio Access Network, enhanced data rate GSM) Evolved Radio Access Network) -
  • the Um interface communicates with a BTS (Base Transceiver Station).
  • BTS Base Transceiver Station
  • e B (Evolved Base Station) accesses the MME (Mobility Management Entity, Mobile Management Entity) in the CN through the S1 interface, the NodeB communicates with the RNC (Radio Network Subsystem) through the Iub interface, and the BTS passes the Abis interface and the BSC.
  • RNC Radio Network Subsystem
  • BTS passes the Abis interface and the BSC.
  • Base Station Controller Base Station Controller
  • RNC connects to BSC through Iur-g interface
  • RNC and BSC respectively access SGSN (Serving GPRS Support Node) in CN through Iu interface.
  • the SGSN and the MME in the CN interact with the ESM control message.
  • the LTE system uses a distributed architecture to achieve energy saving, that is, the basic base station with a relatively wide coverage area determines whether to activate the energy-saving cell in the coverage area of the basic base station according to the current load condition, and when the energy-saving cell is under a low load condition, Turn off the transmitter yourself and enter the power saving state.
  • RAN Radio Access
  • the radio access network On the side of the Network, the radio access network, for the peak demand, 12 transceivers are always active during peak traffic hours, but this is not required during low peak periods (such as late night). Therefore, an energy control mechanism is introduced, each sector has a transceiver capable of covering the sector, and only needs to keep the transceiver in a standby state during the low peak period of the service to meet the service requirement, if all the eNBs can use this An energy-saving strategy can save a lot of energy without affecting the service shield.
  • the above-mentioned energy-saving mechanism needs to set a basic base station with a relatively large coverage area, and a large coverage area of the basic base station causes waste of resources. Moreover, after the other energy-saving cells turn off the transceiver in the energy-saving state, if the coverage area of the basic base station is insufficient, the service loss of other energy-saving cells is caused.
  • the LTE energy-saving scheme lacks an energy-saving compensation technology to compensate for the service loss of the energy-saving cell, and the current distributed architecture cannot be flexibly applied to different application scenarios.
  • Embodiments of the present invention provide an energy-saving compensation method and a base station, which are used to optimize an existing energy-saving mechanism and provide a solution capable of compensating for a service loss of an energy-saving cell.
  • the invention provides an energy saving compensation method, comprising:
  • the base station expands the signal coverage area to form a new cell, so that the energy-saving cell managed by the base station switches the user to the new cell and activates the energy-saving state;
  • the base station switches the user to the energy-saving cell and reduces the signal coverage area.
  • the invention also provides a base station for performing energy saving compensation operation, comprising:
  • the energy-saving compensation unit is configured to expand a signal coverage area of the base station to form a new cell when the energy-saving activation requirement is met,
  • the energy-saving cell managed by the base station can switch the user to the new cell and activate the energy-saving state;
  • the energy-saving de-compensation unit is configured to meet the energy-saving deactivation requirement, and the energy-saving cell managed by the base station deactivates the energy-saving state Switching the user to the energy-saving cell and reducing the signal coverage area of the base station.
  • the energy-saving compensation method and the base station provided by the invention have the following beneficial effects: When some energy-saving cells are in a power-saving state, in order to ensure continuity of service or coverage, compensation operations can be provided through other cells, and energy-saving compensation can be exited when the service is busy. It is guaranteed to provide compensation for the normal operation of the operating cell business.
  • Figure 1 is a structural diagram of a network of a different heterogeneous system
  • FIG. 2 is a schematic diagram of a state in which a coverage base station does not enter an energy-saving compensation according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a state in which a coverage base station enters an energy-saving compensation according to an embodiment of the present invention
  • FIG. 5 is a flowchart of energy-saving compensation deactivation according to a preferred embodiment of the present invention.
  • FIG. 6 is a flowchart of energy saving compensation activation in a preferred embodiment 2 of the present invention.
  • FIG. 8 is a structural diagram of a first preferred embodiment of a base station according to the present invention.
  • FIG. 9 is a structural diagram of a second preferred embodiment of a base station according to the present invention. detailed description
  • the energy-saving compensation method provided by the present invention includes: when the energy-saving activation requirement is met, the base station expands the signal coverage area to form a new cell, and the energy-saving cell managed by the base station switches the user to the new cell and activates the energy-saving state; When required, the energy-saving cell managed by the base station deactivates the energy-saving state, and the base station switches the user to the energy-saving cell and reduces the signal coverage area.
  • the network element that is in normal working environment enters the energy-saving compensation activation state, and compensates the energy-saving service loss of the ESM cell by expanding the signal coverage area and the like.
  • the compensation operation method proposed by the invention is an important link in the energy-saving technology, and different strategies are adopted according to different scenarios. To improve current energy-saving technologies. When some energy-saving cells are in a power-saving state, in order to ensure the continuity of services or coverage, other cells are required to provide compensation operations. This mode of operation may be automatically performed by the network device, or may be centralized by OAM. The compensation mode may be Omnidirectional expansion may also be directed. Different energy saving strategies and parameter configurations are adopted according to different modes. The compensation operation method suitable for different application scenarios is given below.
  • the energy-saving compensation method provided by the network device can use the compensation operation mode automatically performed by the network device to perform energy-saving compensation, and is suitable for an application scenario with a large change in service load and a certain regularity, such as a stadium or
  • the centralized office area, as shown in Figure 2 corresponds to the working status of each base station when the service peaks.
  • Each cell is in the deactivated energy-saving state, and the base stations corresponding to the energy-saving cells have signal transmission.
  • the base station works in the low-peak period of the service, and the base station configured with the energy-saving cell management function expands the signal coverage area, and the base station closes the signal corresponding to the energy-saving cell to enable the energy-saving cell to activate the energy-saving state.
  • the energy-saving compensation operation method in this embodiment includes:
  • Step S401 The base station acquires cell coverage information and load information of the energy-saving cell managed by the base station;
  • the base station having the function of managing the energy-saving cell is configured by the OAM, and is usually configured in the intermediate entity of the centralized area.
  • the coverage base station is the base station with the energy-saving cell management function, and the existing base station. The technical difference is that the coverage base station in this embodiment does not need to always maintain high power signal transmission.
  • the energy-saving cells managed by the base station are also configured by OAM.
  • the base station obtains the cell coverage information and the load information of the energy-saving cell managed by the base station, and specifically adopts the following methods:
  • the base station may obtain the cell coverage information of the energy-saving cell that it manages from the OAM, or obtain the cell coverage information of the energy-saving cell by using the X2 interface with the neighboring base station; the neighboring base stations are specifically the base stations corresponding to the energy-saving cells.
  • the cell coverage information may specifically include a service coverage area or a similar similar information such as: cell type, size, and the like.
  • the base station obtains the load information of the energy-saving cell through the X2 interface between the base station and the neighboring base station, and specifically sets the load information sampling frequency. In this way, the base station can obtain real-time load information of the energy-saving cell.
  • Step S402 The base station determines, according to the obtained load information, that the energy-saving activation requirement is met, and according to the coverage information of the cell, the transmit power is increased according to the pre-configured power and the tilt angle to expand the signal coverage area to form a new cell.
  • the base station determines whether to enter the energy-saving compensation state according to the obtained load information according to a certain policy, and the specific policy may be that the OAM is configured in advance on the base station.
  • Step S403 The base station sends an activation energy-saving indication to the energy-saving cell, and indicates that the energy-saving cell activates the energy-saving state.
  • the step further includes: the base station updating the neighboring cell of the new cell and its corresponding parameter;
  • the new base station Since the base station expands the original signal coverage area to form a new cell when it determines that the energy-saving activation requirement is met, the new base The surrounding cells of the cell have changed, so it is necessary to update the neighboring cells of the new cell and their corresponding parameters.
  • the foregoing process of updating the neighboring cell specifically has a prior art process, which will not be described in detail herein.
  • Step S404 When the energy-saving cell managed by the base station receives the activation energy-saving indication, the user switches to the new cell and activates the energy-saving state.
  • the base station communicates with the energy-saving cell, specifically, the base station corresponding to the energy-saving cell.
  • the base station corresponding to the energy-saving cell receives the activated energy-saving indication sent by the coverage base station, the base station enters or limits the resources used by the energy-saving cell to enable the energy-saving cell to enter. Energy saving status. If the base station corresponding to the energy-saving cell is closed and transmits a signal to the user, it is equivalent to turning off the energy-saving area. Therefore, the user in the energy-saving cell needs to switch to the new cell with signal coverage. The user is allowed to communicate with the overlay base station.
  • the energy-saving cell may send a response to send a message to notify the base station that the energy-saving cell receives the response after the activation of the energy-saving indication.
  • Step S405 The base station optimizes the expanded coverage area by adjusting the transmission function according to the received RLF (Radio Link Failure) and handover related information of the updated neighboring cell.
  • RLF Radio Link Failure
  • the coverage area expanded by the base station according to the configured power and tilt angle is not necessarily the optimal coverage area. Therefore, it is necessary to save energy.
  • the RLF and handover related information of the new neighboring area after the coverage area is expanded to further optimize the expanded coverage area.
  • the energy saving policies implemented by the base station in step S402 in this embodiment may be the following two types:
  • the base station determines, according to the acquired load information, the energy-saving cell that meets the energy-saving activation requirement according to the local setting, for example, according to the implemented load information of each energy-saving cell collected, determining that the energy-saving cell with a relatively low load meets the energy-saving activation requirement; where the local setting refers to covering the base station itself
  • the parameter setting and communication method also include its own load information.
  • the base station increases the transmit power according to the pre-configured power and the tilt angle according to the cell coverage information of the energy-saving cell that meets the energy-saving activation requirement, so as to expand the signal coverage area to form a new cell, so that the new cell can cover the energy-saving cell that meets the energy-saving activation requirement. , thus a directional extension of the transmitted signal;
  • the base station sends an activation energy-saving indication to the energy-saving cell, specifically, the energy-saving indication is sent to the energy-saving cell that meets the energy-saving activation requirement, that is, only the energy-saving cells that meet the energy-saving activation requirement are energy-saving activated, and other cells may not perform energy-saving activation.
  • the directional expansion scheme affects a part of the energy-saving cell, and may also be all energy-saving cells managed by the base station. 2) Omnidirectional expansion plan
  • the base station determines the first energy-saving activation time period according to the time variation rule of the load information of the energy-saving cell managed by the base station, that is, determining the time period suitable for applying the energy-saving compensation according to the energy-saving cell load information of the collected time period;
  • the base station determines that the energy-saving activation requirement is met when the start time of the first energy-saving activation period is reached;
  • the transmission power is increased according to the pre-configured power and the omnidirectional angle to expand the signal coverage.
  • the cover area forms a new cell, and the base station uniformly omnidirectionally covers all energy-saving cells;
  • the base station sends an activation energy saving indication to the energy saving cell, specifically, sending an activation energy saving indication to all the energy saving cells managed by the base station.
  • the omnidirectional expansion scheme is to implement unified energy-saving operation by all the energy-saving cells managed by the base station.
  • the manner in which the energy saving policy is implemented by the base station is not limited to the two implementation manners provided by the present invention, and may be other energy saving strategies, which are all within the protection scope of the present invention.
  • the cell deactivation request CELL DEACTIVATION signaling process is added on the X2 interface, and after receiving the deactivation request, the energy-saving cell activates the energy-saving state and passes the result.
  • the activation response is returned to the overlay base station, and the message format of the deactivation request and the deactivation response is as shown in Table 1 and Table 2, Table 1 Deactivation Request
  • the base station sends an energy-saving message to the MME through the S1 interface with the mobility management entity MME, and the MME sends an activation energy-saving indication to the energy-saving cell according to the energy-saving message, as shown in Table 3.
  • the energy-saving message format is:
  • the energy-saving state is considered to be deactivated, as shown in FIG. 5, the deactivation is implemented by the base station.
  • the process is:
  • Step S501 The base station sends a deactivation energy-saving indication to the energy-saving cell managed by the base station, and indicates that the energy-saving cell deactivates the energy-saving state when determining that the energy-saving deactivation request is met according to the load information of the base station;
  • the coverage base station can decide whether to activate the energy-saving compensation according to its own load situation.
  • Step S502 After receiving the energy-saving deactivation command, the energy-saving cell managed by the base station deactivates the energy-saving state. Specifically, the base station may send the cell activation request by using the S1 interface or the X2 interface with the neighboring base station. The energy-saving cell receiving the cell activation request deactivates the power-saving state and returns a cell activation response to the base station.
  • the coverage is based on communication with the energy-saving cell and the base station corresponding to the energy-saving cell, and the base station activates the energy-saving state by restoring the energy-saving cell resource, such as turning on the transmitter.
  • the base station activates the energy-saving state by restoring the energy-saving cell resource, such as turning on the transmitter.
  • these basics remain in communication with the overlay base station when the energy efficient cell is in a power saving state.
  • Step S503 The base station switches the user to the energy-saving cell, and reduces the signal coverage area by adjusting the tilt angle and reducing the transmit power.
  • the coverage base station no longer supplements the energy-saving area and restores the original coverage area.
  • Step S504 The base station updates the neighboring cell of the reduced coverage area and its corresponding parameters.
  • the base station Since the coverage area is reduced, the surrounding cells change, and the base station updates the neighboring cells of the reduced coverage area and their corresponding parameters after the coverage area is reduced.
  • Step S505 The base station optimizes the reduced coverage area by adjusting the transmission function according to the received radio link failure and handover related information of the updated neighboring cell.
  • the base station performs optimization of the reduced coverage area according to the updated TLR and handover related information of the neighboring cell.
  • the energy saving compensation method provided is implemented by the OAM centralized control base station and the energy-saving cell managed by the OAM, and the method is suitable for use in a highly regular scene such as a residential area.
  • the energy-saving strategy each community operates according to a certain time rule, such as performing energy-saving state during daytime working hours, and can return to normal state after work in the evening.
  • the energy-saving compensation operation method in this embodiment includes:
  • Step S601 The base station determines, according to the extended coverage time period of the OAM configuration, that the start time of the extended coverage time period is met, and the energy saving activation requirement is met; That is, when the base station starts to perform energy-saving compensation operation, it is configured by OAM, and it does not need to be judged by itself.
  • Step S602 The base station increases the transmit power according to the power and the tilt angle configured by the OAM, so as to expand the signal coverage area to form a new cell.
  • How the base station expands the coverage area is also configured by OAM.
  • the OAM determines the time period for performing the energy-saving compensation operation according to the energy-saving policy
  • the coverage base station starts to save energy compensation
  • the coverage base station is configured, and the coverage base station that assumes the coverage role first enters the compensation operation mode, that is, according to the pre-configured Power and dip angle gradually increase the transmission power and increase the coverage area.
  • the OAM configures the energy-saving cell managed by the base station as an energy-saving role, and then enters an energy-saving preparation state, such as forming a new cell in the extended signal coverage area to update some parameters, so as to be able to communicate with the user in a new cell coverage manner.
  • Step S603 The energy-saving cell managed by the base station determines, according to the second energy-saving activation time period configured by the OAM, that the energy-saving activation requirement is met when the start time of the second energy-saving activation time period is reached;
  • the energy-saving cell managed by the base station is also configured by the OAM to start energy-saving activation.
  • Step S604 determining that the energy-saving cell that meets the energy-saving activation requirement switches the user to the new cell and activates the energy-saving state; the step is a cell handover process, which is specifically a prior art process, and is not detailed herein.
  • Step S605 The base station updates the neighboring cell of the new cell formed by the extended signal coverage area and corresponding parameters thereof;
  • Step S605 The base station optimizes the expanded coverage area by adjusting the transmission function according to the received RLF of the neighboring cell and the handover related information.
  • the corresponding time of the OAM configuration starts to perform corresponding actions.
  • the OAM configuration configures the start time of each time period according to the above steps.
  • the OAM also configures the role of each cell, specifically, the coverage base station and the energy-saving cell managed by the OAM. For the cell that bears the coverage role, information such as possible compensation power needs to be pre-configured.
  • the configuration of leaving the energy-saving compensation operation is also implemented.
  • the corresponding departure compensation state flow is as follows:
  • Step S701 The energy-saving cell managed by the base station determines, according to the energy-saving deactivation period of the OAM configuration, that the energy-saving activation request is met when the start time of the energy-saving deactivation time period is reached;
  • Step S702 determining an energy-saving cell that meets the energy-saving deactivation requirement, and deactivating the energy-saving state
  • the coverage base station that covers the role is then entered to deactivate the energy-saving compensation preparation state. If the base station corresponding to the energy-saving cell starts to transmit signals, it will cover the energy-saving cell, and some energy-saving cell parameters are updated to be able to communicate with users in the energy-saving cell. Step S703, the base station determines, according to the reduced coverage area time period configured by the OAM, that the energy-saving deactivation requirement is met when the start time of the reduced coverage area time period is reached;
  • Step S704 The base station switches the user to the energy-saving cell, and after completing the handover, reduces the signal coverage area according to the configuration of the OAM.
  • Step S705 The base station updates the neighboring cell of the reduced coverage area and its corresponding parameters.
  • Step S706 The base station optimizes the reduced coverage area by adjusting the transmission function according to the received radio link failure and handover related information of the updated neighboring cell.
  • the foregoing energy-saving compensation method provided by the present invention when some energy-saving cells are in an energy-saving state, in order to ensure continuity of service or coverage, other cells are required to provide compensation operations, which may be automatically performed by the network device, or may be OAM.
  • the compensation method can be omnidirectional or directional. Different energy saving strategies and parameter configurations are adopted according to different modes.
  • the following steps are performed for the coverage base station: collecting cell load information of the relevant energy-saving cell, obtaining information about the coverage area of the energy-saving cell, and determining to enter the energy-saving compensation state according to the setting policy;
  • the configured power and dip angle gradually increase the transmission power and increase the coverage area; send the energy-saving indication to the relevant energy-saving cell through S 1/X2 transmission; collect the RLF from the neighboring area and switch related information, and adjust the transmission power according to this, optimize and expand After the coverage area; decide to leave the energy-saving compensation state according to the current load; send the deactivation energy-saving command to the relevant energy-saving cell through S 1/X2; switch the UE to the energy-saving cell; gradually reduce the transmission power, adjust the dip angle to narrow the coverage area; The RLF of the area and the related information are switched, and the transmission power is adjusted accordingly, and the reduced coverage area is optimized.
  • the energy-saving role and the energy-saving cell attribute of each cell need to be configured to cover the coverage base of the cell; the energy-saving policy and the load threshold are configured to cover the base station.
  • the following steps are required: receiving an activated energy-saving indication from the coverage cell by using S 1/X2, performing an energy-saving operation; starting to switch the new cell formed by the user to the extended area; X2 receives the deactivation energy saving indication from the coverage cell, and performs power transmission to deactivate the power saving state.
  • the following steps are performed:
  • the OAM pre-configuration strategy it is determined to enter the energy-saving compensation state; the transmission power is gradually expanded according to the pre-configured power and the inclination angle, and the coverage area is expanded; Update the neighbor relationship and corresponding parameters, collect the RLF from the new neighbor and switch the related information, and adjust the transmit power according to this to optimize the expanded coverage area.
  • the OAM pre-configuration policy enter the deactivation energy-saving compensation preparation state.
  • the following steps are performed for the base station device corresponding to the energy-saving cell: according to the OAM pre-configured policy, the cell serving as the energy-saving role enters the energy-saving preparation state; and the new cell formed after the user is switched to the coverage base station to expand the coverage area; After the handover is completed, the transmitter will be turned off according to the local policy, or other energy-saving operations will be taken; according to the pre-configured policy, it is decided to deactivate the energy-saving compensation state, that is, the transmitter is turned on, and the transmission is performed according to the pre-configured power and inclination.
  • the OAM device completes the configuration of the base station device corresponding to the coverage base station and the energy-saving cell, and includes: configuring each cell role, mainly configuring the coverage base station corresponding to the coverage cell, and configuring the energy-saving cell; configuring the energy-saving policy, etc. For each cell.
  • a base station that performs an energy-saving compensation operation.
  • the method includes: an energy-saving compensation unit 10, configured to expand a signal coverage area of a base station to form a new cell when the energy-saving activation requirement is met, Enabling the energy-saving cell managed by the base station to switch the user to the new cell and activate the energy-saving state;
  • the energy-saving compensation unit 10 includes: an information acquiring unit 101a, configured to acquire cell coverage information and load information of the energy-saving cell managed by the base station; and a first expansion unit 102a, configured to acquire according to the And determining, by the load information, that the energy-saving activation requirement is met, increasing the transmission power according to the pre-configured power and the tilt angle according to the cell coverage information, to expand the signal coverage area of the base station to form a new cell; and indicating the activation unit 103a, Sending an activation energy saving indication, instructing the energy saving cell to switch the user to the new cell and activate the power saving state.
  • the information acquiring unit 101a acquires cell coverage information of the energy-saving cell from the OAM, or through an interface between the base station and the neighboring base station, and acquires load information of the energy-saving cell by using an interface between the base station and the neighboring base station.
  • the first enlarging unit 102a specifically includes: an energy-saving cell determining unit, configured to determine the load information acquired by the resident, and determine an energy-saving cell that meets the energy-saving activation requirement according to the local setting; and the partial coverage unit is configured to satisfy The cell coverage information of the energy-saving cell required for the energy-saving activation is increased according to the pre-configured power and the tilt angle to expand the base station signal coverage area to form a new cell; the indication activation unit specifically sends an activation to the energy-saving cell that meets the energy-saving activation requirement. Energy saving instructions.
  • the first enlarging unit 102a specifically includes: a first time period determining unit, configured to determine a first energy saving activation time period according to a time variation rule of load information of the energy saving cell managed by the base station; a unit, configured to determine a power saving activation requirement when the start time of the first energy saving activation time period is reached; an omnidirectional coverage unit, configured to use the pre-configured power and the omnidirectional according to the cell coverage information of all the energy saving cells The angle increases the transmission power to expand the signal coverage area of the base station to form a new cell.
  • the indication activation unit specifically sends an activation energy saving indication to all the energy-saving cells managed by the base station.
  • the energy-saving de-compensation unit 20 includes: an indication de-activation unit 201a, configured to send a de-energy-saving indication to the energy-saving cell managed by the base station when the energy-saving deactivation request is met according to the load information of the base station, indicating that the energy-saving indication is The cell deactivates the energy-saving state; the first reducing unit 202a is configured to: after the energy-saving cell deactivates the energy-saving state, switch the user to the energy-saving cell, and reduce the signal coverage area of the base station by adjusting the tilt angle and reducing the transmit power.
  • an indication de-activation unit 201a configured to send a de-energy-saving indication to the energy-saving cell managed by the base station when the energy-saving deactivation request is met according to the load information of the base station, indicating that the energy-saving indication is The cell deactivates the energy-saving state
  • the first reducing unit 202a is configured to: after the energy-saving cell deactivates the energy-saving state, switch the user to
  • the energy-saving compensation unit 10 includes: a second satisfaction requirement determining unit 101b, configured to determine the arrival of the expansion according to an extended coverage period of the OAM configuration. At the start time of the coverage period, the energy-saving activation requirement is met; the second expansion unit 102b is configured to increase the transmission power according to the power and inclination of the OAM configuration, to expand the signal coverage area of the base station to form a new cell, so that the base station manages The energy efficient cell is capable of switching the user to the new cell and activating the power saving state.
  • the energy-saving de-compensation unit 20 includes: a third-satisfying requirement determining unit 201b, configured to determine, according to the reduced coverage time period of the OAM configuration, when the start time of the reduced coverage time period is reached, the energy-saving deactivation is satisfied.
  • the second reduction unit 202b is configured to switch the user to the energy-saving cell, and reduce the signal coverage area according to the configuration of the OAM after the handover is completed.
  • the base station further includes: a first neighboring area updating unit 30, configured to: after the signal coverage area of the base station is expanded to form a new cell, update the neighboring cell of the new cell and corresponding
  • the first optimization unit 40 is configured to optimize the expanded coverage area by adjusting the transmission function according to the received radio link failure and handover related information of the updated neighboring cell
  • the second neighboring area updating unit 50 is configured to After the signal coverage area is reduced, the neighboring cell of the reduced coverage area and its corresponding parameters are updated
  • the second optimization unit 60 is configured to adjust the transmission function according to the received radio link failure and handover related information of the updated neighboring cell. Optimize the reduced coverage area.
  • the above-mentioned energy-saving compensation operation scheme provided by the present invention mainly includes two mechanisms of automatic network equipment and centralized control of OAM, and can exchange information through interfaces such as SI and X2, and can use different strategies according to different scenarios to save energy utilization of the entire network. .
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • computer-usable storage interfaces including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Description

一种节能补偿方法及基站 本申请要求在 2011年 8月 13日提交中国专利局、 申请号为 201010253982.7、 发明名称为
"一种节能补偿方法及基站 "的中国专利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及无线通信技术领域， 尤其涉及一种节能补偿方法及基站。 背景技术
节能技术有助于改善我们的环境， 同时节约资源和带来成本增益。 目前， 移动通信网 络的节能有以下几种途径： 1 )在保证覆盖、 容量、 服务盾量不受影响的前提下， 优化基 站站址的数量； 2 )寻找有效的提高能源利用率和降低设备功耗的方法； 3 )研究开发可持 续能源如风能、 太阳能等。
对于通过途径 2 )的节能技术， 提出了 ESM ( Energy Savings Management, 节能管理 ) 概念， ESM是指优化整个或部分网络的资源利用率。 ESM通过从网络收集和评估相关信 息， 发起适当的动作来调整网络配置， 从而在节能的同时满足服务需求。
对于自优化网络而言， 节能实体大致可分为三种结构： 分布式架构， 网元收集必要的 信息进行自优化过程， 不需 OAM ( Operation Administration and Maintenance, 操作管理与 维护） 的参与； 集中式架构， OAM从网元收集信息触发节能算法， 然后决定网元的后续 动作； 混合式结构， 以上两种方法混合使用。
节能方案的实施中包含两个基本过程：
1 ) 节能激活， 通过关闭演进基站 e B的小区或限制使用部分物力资源达到节省能源 的目的， 相应的 eNB进入节能状态；
2 ) 节能去激活， 开启被关闭的小区或恢复被限制的物力资源的使用， 来满足增长的 业务需求和 Q0S需求， 相应的 eNB小区从节能激活状态恢复至正常状态。
节能的动作包含： 关闭 /打开小区； 关闭 /打开载波； 关闭 /打开收发机； 关闭 /打开 He B 及其它。
如图 1所示为 LTE系统和 LTE-A系统共存的异系统网络结构图， 用户设备 UE、 无线 接入网和 CN( Core Network,核心网）构成了整个异系统网络结构， UE支持通过 LTE( Long Term Evolution, 长期演进 ) -Uu接口和演进基站 eNB通信， 及通过 UTRAN-Uu接口与基 站 NodeB通信，及通过 GERAN( GSM EDGE Radio Access Network,增强型数据速率 GSM 演进无线接入网 ) -Um接口与 BTS ( Base Transceiver Station, 基站收发信机）通信。
e B (演进基站）通过 S 1接口接入 CN中的 MME ( Mobility Management Entity, 移 动管理实体）， NodeB通过 Iub接口与 RNC ( Radio Network Subsystem, 无线网络控制器 ) 通信， BTS通过 Abis接口与 BSC ( Base Station Controller, 基站控制器）通信， RNC通过 Iur-g接口连接 BSC , RNC和 BSC分别通过 Iu接口接入 CN中的 SGSN ( Serving GPRS Support Node, 服务 GPRS支持节点）。 CN中的 SGSN和 MME交互 ESM控制消息。
目前 LTE系统釆用分布式架构实现节能， 即覆盖区域比较广的基本基站根据当前的负 荷状况， 决定是否激活在该基本基站覆盖区域内的节能小区， 节能小区处于负荷很低情况 下时， 可以自己关闭发射机进入节能状态。
例如对于一个三扇区的小区来说， 每个扇区有 4 个收发机， RAN ( Radio Access
Network, 无线接入网）侧的设备针对高峰期的需求， 在业务高峰期时有 12个收发机始终 处于激活状态， 但在业务低峰期 （比如深夜）并不需要这样。 因此引入能源控制机制， 每 一个扇区具有一个能够覆盖该扇区的收发机， 在业务低峰期只需要保持该收发机处于待机 状态就可以满足业务需求了， 如果所有的 eNB都能够使用这种节能策略， 可以在不影响服 务盾量的前提下节省大量的能源。
但是上述节能机制需要设置覆盖区域比较大的基本基站， 基本基站覆盖区域太大会造 成资源浪费。 而且在节能状态下其它节能小区关闭收发机后， 如果基本基站的覆盖区域不 够大会造成其它节能小区的业务损失。
目前 LTE的节能方案， 缺乏一种节能补偿技术来补偿节能小区的业务损失， 且釆用当 前的分布式架构不能灵活的适用不同应用场景。 发明内容
本发明实施例提供一种节能补偿方法及基站， 用以优化现有节能机制， 提供一种能够 补偿节能小区的业务损失的方案。
本发明提供一种节能补偿方法， 包括：
在满足节能激活要求时， 基站扩大信号覆盖区域形成新小区， 以使所述基站管理的节 能小区将用户切换到所述新小区并激活节能状态；
在满足节能去激活要求时， 若所述基站管理的节能小区去激活节能状态， 则所述基站 将用户切换到所述节能小区并缩小信号覆盖区域。
本发明还提供一种进行节能补偿操作的基站， 包括：
节能补偿单元， 用于在满足节能激活要求时， 扩大基站的信号覆盖区域形成新小区， 以使所述基站管理的节能小区能够将用户切换到所述新小区并激活节能状态； 节能去补偿单元， 用于在满足节能去激活要求， 且所述基站管理的节能小区去激活节 能状态时， 将用户切换到所述节能小区并缩小基站的信号覆盖区域。
利用本发明提供的节能补偿方法及基站具有以下有益效果： 当某些节能小区处于节能 状态， 为了确保业务或者覆盖的连续性， 能够通过其它小区提供补偿操作， 且在业务繁忙 时能够退出节能补偿保证提供补偿操作小区业务的正常进行。 附图说明
图 1为现有异系统网络结构图；
图 2为依照本发明实施例中覆盖基站未进入节能补偿状态示意图；
图 3为依照本发明实施例中覆盖基站进入节能补偿状态示意图；
图 4为依照本发明优选实施方式一中节能补偿激活流程图；
图 5为依照本发明优选实施方式一中节能补偿去激活流程图；
图 6为依照本发明优选实施方式二中节能补偿激活流程图；
图 7为依照本发明优选实施方式二中节能补偿去激活流程图；
图 8为依照本发明提供的基站优选实施方式一中的结构图；
图 9为依照本发明提供的基站优选实施方式二中的结构图。 具体实施方式
下面结合附图和实施例对本发明提出的节能补偿方法及基站进行更详细的说明。 鉴于现有节能机制需要设置覆盖区域比较大的基本基站， 基本基站覆盖区域太大会造 成资源浪费， 而且在节能状态下其它节能小区关闭收发机后， 如果基本基站的覆盖区域不 够大会造成其它节能小区的业务损失。 本发明提出的节能补偿方法包括： 在满足节能激活 要求时， 基站扩大信号覆盖区域形成新小区， 所述基站管理的节能小区将用户切换到所述 新小区并激活节能状态； 在满足节能去激活要求时， 所述基站管理的节能小区去激活节能 状态， 所述基站将用户切换到所述节能小区并缩小信号覆盖区域。
本发明提出的上述节能补偿方法， 当某个网元进入 ESM状态后， 周围处于正常工作 的网元就会进入节能补偿激活状态， 通过扩大信号覆盖区域等方法补偿 ESM小区的节能 业务损失。
本发明提出的补偿操作方法是节能技术中的重要环节， 根据不同场景， 釆用不同策略 来完善当前的节能技术。 当某些节能小区处于节能状态，为了确保业务或者覆盖的连续性， 需要其它小区提供补偿操作， 这种操作模式可以是网络设备自动进行的， 也可以是 OAM 集中控制的， 补偿的方式可以是全向扩展的， 也可能是定向的。 根据不同的模式釆取不同 的节能策略及参数配置。 下面给出适于不同应用场景的补偿操作方法。
依照本发明的优选实施一中， 提供的节能补偿方法， 可以釆用网络设备自动进行的补 偿操作模式来进行节能补偿， 适于应用于业务负荷变化大且有一定规律的应用场景， 如体 育场或集中的办公区， 如图 2所示， 对应业务高峰时各基站工作状态， 各小区处于去激活 节能状态， 节能小区对应的基站均有信号发射。 如图 3所示， 对应业务低峰期时各基站工 作， 配置有节能小区管理功能的基站扩大信号覆盖区域， 节能小区对应的基站关闭信号发 射， 从而使节能小区激活节能状态。
如图 4所示， 本实施例中节能补偿操作方法， 包括：
步骤 S401 , 基站获取其管理的节能小区的小区覆盖信息和负荷信息；
本实施中具有管理节能小区功能的基站是由 OAM配置的， 通常配置在集中区域的中 间实体上， 本实施例中下面所称的覆盖基站即为该具有节能小区管理功能的基站， 与现有 技术不同的是， 本实施例中覆盖基站不需始终保持大功率信号发射。 所述基站管理的节能 小区也是由 OAM配置的。
本实施例中基站获取其管理的节能小区的小区覆盖信息和负荷信息， 具体可釆用如下 方式：
基站可以从 OAM获取其管理的节能小区的小区覆盖信息，也可以通过与邻基站间 X2 接口获取节能小区的小区覆盖信息； 这些邻基站具体为对应上述节能小区的基站。 小区覆 盖信息具体可以包括业务覆盖区 Service Coverage Area或相当的类似信息如： 小区类型、 大小等。
基站通过与邻基站间 X2接口获取节能小区的负荷信息， 具体可以设置负荷信息釆样 频率。 这样， 基站可以获取节能小区的实时负荷信息。
步骤 S402 , 基站根据获取的所述负荷信息， 确定满足节能激活要求时， 根据所述小区 覆盖信息按预配置的功率及倾角提高发射功率， 来扩大信号覆盖区域形成新小区；
本实施例中基站根据获取的所述负荷信息， 依据一定策略， 决定是否进入节能补偿状 态， 具体策略可以是 OAM事先配置在基站上的。
步骤 S403 ,基站向节能小区发送激活节能指示，指示节能小区激活节能状态；优选地， 该步骤还包括： 基站更新所述新小区的邻小区及其相应参数；
由于基站在确定满足节能激活要求时扩大了原有的信号覆盖区域形成新小区， 因此新 小区的周围小区发生了变化， 因此需要更新上述新小区的邻小区及其相应参数。 上述更新 邻小区的过程中具体有现有技术过程， 这里不再详述。
步骤 S404,基站管理的节能小区接收到激活节能指示时， 将用户切换到新小区并激活 节能状态；
本实施例中基站与节能小区通信， 具体为与节能小区对应的基站通信， 节能小区对应 的基站接收到覆盖基站发送的激活节能指示时， 通过关闭或限制节能小区使用的资源， 使 节能小区进入节能状态。 如节能小区对应的基站关闭向用户发射信号， 相当于关闭节能小 区， 因此需要将节能小区中用户切换到上述有信号覆盖的新小区。使用户与覆盖基站通信。
本实施中， 节能小区完成用户切换后可以发响应送消息通知基站该节能小区接收上述 激活节能指示后作出的响应。
步骤 S405 , 基站根据接收的更新后的邻小区的 RLF ( Radio Link failure, 无线链路失 败）及切换相关信息， 通过调整发射功能优化扩大后的覆盖区域。
基站按配置的功率和倾角扩大的覆盖区域并不一定是最优的覆盖区域， 因此需要节能 扩大覆盖区域后新邻区的 RLF及切换相关信息进一步优化扩大后覆盖区域。
本实施例步骤 S402中基站实施的节能策略可以是以下两种：
1 )定向扩展方案
基站根据获取的负荷信息， 结合本地设置确定满足节能激活要求的节能小区， 如根据 收集的各节能小区的实施负荷信息， 确定负荷比较低的节能小区满足节能激活要求； 这里 本地设置指覆盖基站本身的参数设置及通信方式， 也包括本身的负荷信息等。
基站根据满足节能激活要求的节能小区的小区覆盖信息， 按预配置的功率及倾角提高 发射功率， 来扩大信号覆盖区域形成新小区， 这样新小区主要覆盖到上述满足节能激活要 求的节能小区即可， 因此是发射信号的定向扩展；
基站向节能小区发送激活节能指示， 具体为向满足节能激活要求的节能小区发送激活 节能指示， 即只对哪些满足节能激活要求的节能小区进行节能激活， 而其它小区可以不进 行节能激活。
定向扩展方案影响到可能是一部分节能小区， 也可能是基站管理的全部的节能小区。 2 )全向扩展方案
基站根据其管理的节能小区的负荷信息的时间变化规律确定第一节能激活时间段， 即 根据其收集的一段时间内的节能小区负荷信息， 确定出适于应用节能补偿的时间段；
基站确定到达第一节能激活时间段的开始时间时， 满足节能激活要求；
基站在确定满足激活要求时， 按预配置的功率及全向角提高发射功率， 来扩大信号覆 盖区域形成新小区， 基站统一向所有节能小区全向覆盖；
基站向节能小区发送激活节能指示， 具体为向其管理的所有节能小区发送激活节能指 示。
全向扩展方案是由基站对其管理的所有节能小区实施统一节能操作。
当然， 上述由基站实施节能策略的方式不限于本发明给出的两种实施方式， 还可以是 其它节能策略， 均应落在本发明保护范围之内。
为了让覆盖基站发送激活节能指示通知节能小区激活节能状态， 本实施例中在 X2接 口增加小区去激活请求 CELL DEACTIVATION信令过程， 节能小区接收到去激活请求后， 激活节能状态并将结果通过去激活响应返回给覆盖基站， 去激活请求和去激活响应的消息 格式如表 1和表 2所示， 表 1 去激活请求
Figure imgf000008_0001
表 2 去激活响应
Figure imgf000008_0002
此外在 Inter _ RAT场景即异系统结构下， 基站通过与移动管理实体 MME间的 S 1接 口向 MME发送节能消息，由所述 MME根据所述节能消息向节能小区发送激活节能指示， 如表 3所示， 节能消息格式为：
表 3 节能消息
Figure imgf000008_0003
下面给出本实施例中在基站扩大覆盖区域进入节能补偿状态后， 当提供补偿操作的覆 盖基站的业务负荷显著上升将考虑去激活节能状态， 如图 5所示， 由基站控制的去激活实 现流程为：
步骤 S501 ,基站根据自身的负荷信息确定满足节能去激活要求时， 向基站管理的节能 小区发送去激活节能指示， 指示节能小区去激活节能状态；
之前将节能小区均切换到新小区，在业务高峰期时覆盖基站的负荷会明显增多， 因此， 覆盖基站可以根据自身的负荷情况决定是否去激活节能补偿。
步骤 S502 , 基站管理的节能小区接收到节能去激活指令后， 去激活节能状态； 具体地，基站可以通过 S 1接口或与邻基站间的 X2接口发送小区激活请求。接收小区 激活请求的节能小区去激活节能状态并向基站返回小区激活响应。
具体地， 覆盖基于与节能小区通信与该节能小区对应的基站通信， 这些基站通过恢复 节能小区资源如打开发射机， 去激活节能状态。 当然， 在节能小区处于节能状态时， 这些 基本还保持与覆盖基站通信。
步骤 S503 ,基站将用户切换到节能小区上， 并通过调整倾角和降低发射功率缩小信号 覆盖区域。
由于节能小区的资源已恢复， 因此为了满足当前高负荷要求， 覆盖基站不再对节能小 区进行业务补充， 恢复到原来的覆盖区域。
步骤 S504 , 基站更新缩小后的覆盖区域的邻小区及其相应参数；
由于缩小覆盖区域， 因此周围小区发生了变化， 基站在缩小覆盖区域后更新缩小后的 覆盖区域的邻小区及其相应参数。
步骤 S505 ,基站根据接收的更新后的邻小区的无线链路失败及切换相关信息， 通过调 整发射功能优化缩小后的覆盖区域。
为了实现最优的覆盖区域，基站根据更新后的邻小区的 TLR及切换相关信息进行缩小 后覆盖区域的优化。
依照本发明另一实施中， 提供的节能补偿方法由 OAM集中控制基站及其管理的节能 小区来进行节能操作，该方法适于应用于规律性很强的场景如住宅区等。此时的节能策略， 各小区按照一定时间规律进行操作， 如在白天工作时间执行节能状态， 晚间下班后可以回 复正常状态。
如图 6所示， 本实施例中节能补偿操作方法， 包括：
步骤 S601 , 基站根据 OAM配置的扩大覆盖区时间段， 确定到达扩大覆盖区时间段的 开始时间时， 满足节能激活要求； 即基站什么时候开始进行节能补偿操作是由 OAM配置好的， 不需要自行判断。
步骤 S602 , 基站按 OAM配置的功率及倾角提高发射功率， 来扩大信号覆盖区域形成 新小区；
基站以怎样的方式进行覆盖区域扩大也是 OAM配置好的。
本实施例中 OAM根据节能策略确定进行节能补偿操作的时间段时， 将覆盖基站什么 时候开始节能补偿在覆盖基站配置好， 这样承担覆盖角色的覆盖基站率先进入补偿操作模 式， 即按照预配置的功率和倾角逐渐扩大发射功率， 提高覆盖区域。
而 OAM配置该基站管理的担任节能角色的节能小区， 随后进入节能准备状态， 如在 扩大信号覆盖区域形成新小区进行一些参数的更新， 以能够以新小区覆盖方式与用户通 信。
步骤 S603 , 基站管理的节能小区根据 OAM配置的第二节能激活时间段， 确定到达所 述第二节能激活时间段的开始时间时， 满足节能激活要求；
即基站管理的节能小区也是由 OAM配置好什么时候开始进行节能激活。
步骤 S604 , 确定满足节能激活要求的节能小区将用户切换到新小区并激活节能状态； 该步骤为小区切换过程， 具体为现有技术过程， 这里不再详述。
本发明实施例中基站在扩大信号覆盖区域后， 还包括： 步骤 S605 , 基站更新扩大信号 覆盖区域后形成的新小区的邻小区及其相应参数；
步骤 S605 , 基站根据接收的更新后的邻小区的 RLF及切换相关信息， 通过调整发射 功能优化扩大后的覆盖区域。
由 OAM 集中控制的节能策略中， 基站和节能小区之间不需要信令交互， 各自根据
OAM配置的相应时间开始进行相应的动作， 优选地， OAM配置按上述步骤配置各时间段 的开始时间。 本实施例中 OAM还配置了各小区的角色， 具体为配置覆盖基站及其管理的 节能小区， 对于承担覆盖角色的小区还需要预配置可能的补偿功率等信息。
由 OAM集中控制的节能策略中， 还实现离开节能补偿操作的配置， 如图 7所示， 相 应的离开补偿状态流程如下：
步骤 S701 , 基站管理的节能小区根据 OAM配置的节能去激活时间段， 确定到达所述 节能去激活时间段的开始时间时， 满足节能激去活要求；
步骤 S702 , 确定满足节能去激活要求的节能小区， 去激活节能状态；
承担覆盖角色的覆盖基站， 随后进入去激活节能补偿准备状态。 如节能小区对应的基 站开始发射信号后会覆盖到节能小区， 进行一些节能小区参数更新， 以能够与节能小区中 用户通信。 步骤 S703 , 基站根据 OAM配置的缩小覆盖区时间段， 确定到达所述缩小覆盖区时间 段的开始时间时， 满足节能去激活要求；
步骤 S704 , 基站将用户切换到所述节能小区， 完成切换后根据 OAM的配置缩小信号 覆盖区域；
步骤 S705 , 基站更新缩小后的覆盖区域的邻小区及其相应参数；
步骤 S706 ,基站根据接收的更新后的邻小区的无线链路失败及切换相关信息， 通过调 整发射功能优化缩小后的覆盖区域。
本发明提供的上述节能补偿方法， 由当某些节能小区处于节能状态， 为了确保业务或 者覆盖的连续性，需要其它小区提供补偿操作，这种操作模式可以是网络设备自动进行的， 也可以 OAM集中控制的， 补偿的方式可以是全向扩展的， 也可能是定向的。 根据不同的 模式釆取不同的节能策略及参数配置。
在依照本发明优选实施方式一中， 对于覆盖基站， 需要执行以下几个步骤： 收集相关 节能小区的小区负荷信息， 获取节能小区覆盖区域等信息， 依据设定策略决定进入节能补 偿状态； 按照预配置的功率和倾角逐渐扩大发射功率， 提高覆盖区域； 通过 S 1/X2发送激 活节能指示给相关的节能小区； 收集来自邻区的 RLF以及切换相关信息， 并据此调整发射 功率等， 优化扩大后的覆盖区； 根据当前负荷决定离开节能补偿状态； 通过 S 1/X2发送去 激活节能命令给相关的节能小区； 切换 UE至节能小区； 逐渐减少发射功率， 调整倾角缩 小覆盖区域； 收集来自邻区的 RLF以及切换相关信息， 并据此调整发射功率等， 优化缩小 后的覆盖区。
对于 OAM设备， 需要配置每个小区的节能角色及节能小区属性给覆盖小区的覆盖基 站； 配置节能策略及负荷门限等给覆盖基站。
对于节能小区对应的基站设备， 需要执行以下几个步骤： 通过 S 1/X2接收来自覆盖小 区的激活节能指示， 进行节能操作； 开始切换用户至上述扩大区域后形成的新小区； 通过 S 1/X2接收来自覆盖小区的去激活节能指示， 进行功率发射从而去激活节能状态。
依照本发明的优先实施方式二中，对于覆盖基站， 需要执行以下几个步骤： 按照 OAM 预配置的策略， 决定进入节能补偿状态； 按照预配置的功率和倾角逐渐扩大发射功率， 扩 大覆盖区域； 更新邻区关系及相应参数等， 收集来自新邻区的 RLF以及切换相关信息， 并 据此调整发射功率等， 优化扩大后的覆盖区； 按照 OAM预配置的策略， 进入去激活节能 补偿准备状态； 开始切换用户到离开节能状态的小区； 逐渐减少发射功率和调整倾角， 缩 小自己的覆盖区域； 收集来自邻区的 RLF以及切换相关信息， 并据此调整发射功率等， 优 化缩小后的覆盖区域。 本实施例中对于节能小区对应的基站设备， 需要执行以下步骤： 按照 OAM预配置的 策略， 担任节能角色的小区， 进入节能准备状态； 开始切换用户到覆盖基站扩大覆盖区域 后形成的新小区； 切换完成， 将根据本地策略关闭发射机， 或釆取其它节能操作； 根据预 先配置的策略， 决定去激活节能补偿状态， 即打开发射机， 根据按照预配置的功率和倾角 进行发射。
本实施例中 OAM设备完成了上述覆盖基站和节能小区对应的基站设备的各个配置， 主要包括： 配置每个小区角色， 主要为配置覆盖小区对应的覆盖基站， 及配置节能小区； 配置节能策略等给各小区。
依照本发明实施例中， 提供一种进行节能补偿操作的基站， 如图 8所示， 包括： 节能 补偿单元 10, 用于在满足节能激活要求时， 扩大基站的信号覆盖区域形成新小区， 以使所 述基站管理的节能小区能够将用户切换到所述新小区并激活节能状态； 节能去补偿单元
20, 用于在满足节能去激活要求， 且所述基站管理的节能小区去激活节能状态时， 将用户 切换到所述节能小区并缩小基站的信号覆盖区域。
依照本发明基站优选实施方式一中， 所述节能补偿单元 10包括： 信息获取单元 101a, 用于获取基站管理的节能小区的小区覆盖信息和负荷信息； 第一扩大单元 102a, 用于根据 获取的所述负荷信息， 确定满足节能激活要求时， 根据所述小区覆盖信息按预配置的功率 及倾角提高发射功率， 来扩大基站的信号覆盖区域形成新小区； 指示激活单元 103a, 用于 向节能小区发送激活节能指示， 指示节能小区将用户切换到新小区并激活节能状态。
优选地， 所述信息获取单元 101a, 从 OAM, 或通过所述基站与邻基站间接口获取节 能小区的小区覆盖信息； 通过所述基站与邻基站间接口获取节能小区的负荷信息。
优选地， 所述第一扩大单元 102a, 具体包括： 节能小区确定单元， 用于才 居获取的所 述负荷信息， 结合本地设置确定满足节能激活要求的节能小区； 部分覆盖单元， 用于根据 满足节能激活要求的节能小区的小区覆盖信息， 按预配置的功率及倾角提高发射功率， 来 扩大基站信号覆盖区域形成新小区； 所述指示激活单元， 具体为向满足节能激活要求的节 能小区发送激活节能指示。
或者， 所述第一扩大单元 102a, 具体包括： 第一时间段确定单元， 用于根据所述基站 管理的节能小区的负荷信息的时间变化规律确定第一节能激活时间段； 第一满足要求确定 单元， 用于确定到达所述第一节能激活时间段的开始时间时， 满足节能激活要求； 全向覆 盖单元， 用于根据所有节能小区的所述小区覆盖信息， 按预配置的功率及全向角提高发射 功率， 来扩大基站的信号覆盖区域形成新小区； 所述指示激活单元， 具体为向所述基站管 理的所有节能小区发送激活节能指示。 优选地， 所述节能去补偿单元 20 , 包括： 指示去激活单元 201a, 用于根据基站的负荷 信息确定满足节能去激活要求时， 向所述基站管理的节能小区发送去激活节能指示， 指示 节能小区去激活节能状态； 第一缩小单元 202a, 用于在所述节能小区去激活节能状态后， 将用户切换到所述节能小区上， 并通过调整倾角和降低发射功率缩小基站的信号覆盖区 域。
依照本发明基站的优选实施方式二中， 如图 9所示， 所述节能补偿单元 10包括： 第 二满足要求确定单元 101b , 用于根据 OAM配置的扩大覆盖区时间段， 确定到达所述扩大 覆盖区时间段的开始时间时， 满足节能激活要求； 第二扩大单元 102b , 用于按 OAM配置 的功率及倾角提高发射功率， 来扩大基站的信号覆盖区域形成新小区， 以使所述基站管理 的节能小区能够将用户切换到所述新小区并激活节能状态。
优选地， 所述节能去补偿单元 20包括： 第三满足要求确定单元 201b , 用于根据 OAM 配置的缩小覆盖区时间段， 确定到达所述缩小覆盖区时间段的开始时间时， 满足节能去激 活要求； 第二缩小单元 202b , 用于将用户切换到所述节能小区， 完成切换后根据 OAM的 配置缩小信号覆盖区域。
优选地， 如图 8、 图 9所示， 该基站还包括： 第一邻区更新单元 30 , 用于在扩大基站 的信号覆盖区域形成新小区之后， 更新所述新小区的邻小区及其相应参数； 第一优化单元 40 , 用于根据接收的更新后的邻小区的无线链路失败及切换相关信息， 通过调整发射功能 优化扩大后的覆盖区域； 第二邻区更新单元 50 , 用于在缩小信号覆盖区域之后， 更新缩小 后的覆盖区域的邻小区及其相应参数； 第二优化单元 60 , 用于根据接收的更新后的邻小区 的无线链路失败及切换相关信息， 通过调整发射功能优化缩小后的覆盖区域。
本发明提供的上述节能补偿操作的方案， 主要包括网络设备自动进行和 OAM集中控 制两种机制， 能够通过 S I , X2等接口交互信息， 可以根据不同场景， 釆用不同策略节省 整个网络的能量利用。
本领域内的技术人员应明白， 本发明的实施例可提供为方法、 系统、 或计算机程序产 品。 因此， 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实 施例的形式。 而且， 本发明可釆用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介盾 （包括但不限于磁盘存储器、 CD-ROM、 光学存储器等）上实施的计算机程 序产品的形式。
本发明是参照根据本发明实施例的方法、 设备（系统）、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器， 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中， 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品， 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上， 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理， 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例， 但本领域内的技术人员一旦得知了基本创造性概 念， 则可对这些实施例作出另外的变更和修改。 所以， 所附权利要求意欲解释为包括优选 实施例以及落入本发明范围的所有变更和修改。
显然， 本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实 施例的精神和范围。 这样， 倘若本发明实施例的这些修改和变型属于本发明权利要求及其 等同技术的范围之内， 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种节能补偿方法， 其特征在于， 包括：
在满足节能激活要求时， 基站扩大信号覆盖区域形成新小区， 以使所述基站管理的节 能小区将用户切换到所述新小区并激活节能状态；
在满足节能去激活要求时， 若所述基站管理的节能小区去激活节能状态， 则所述基站 将用户切换到所述节能小区并缩小信号覆盖区域。
2、 如权利要求 1 所述的方法， 其特征在于， 在满足节能激活要求时， 基站扩大信号 覆盖区域形成新小区， 以使所述基站管理的节能小区将用户切换到所述新小区并激活节能 状态， 具体包括：
基站获取其管理的节能小区的小区覆盖信息和负荷信息；
所述基站根据获取的负荷信息， 确定满足节能激活要求时， 根据所述小区覆盖信息按 预配置的功率及倾角提高发射功率， 来扩大信号覆盖区域形成新小区；
所述基站向节能小区发送激活节能指示， 指示节能小区激活节能状态， 以使所述基站 管理的节能小区接收到激活节能指示时， 将用户切换到新小区并激活节能状态。
3、 如权利要求 2 所述的方法， 其特征在于， 所述基站获取其管理的节能小区的小区 覆盖信息和负荷信息， 具体包括：
所述基站从操作管理与维护 OAM, 或通过与邻基站间接口获取节能小区的小区覆盖 信息；
所述基站通过与邻基站间接口获取节能小区的负荷信息。
4、 如权利要求 2 所述的方法， 其特征在于， 所述基站根据获取的所述负荷信息， 确 定满足节能激活要求时， 按预配置的功率及倾角提高发射功率， 来扩大信号覆盖区域形成 新小区， 具体包括：
所述基站根据获取的负荷信息， 结合本地设置确定满足节能激活要求的节能小区； 所述基站根据满足节能激活要求的节能小区的小区覆盖信息， 按预配置的功率及倾角 提高发射功率， 来扩大信号覆盖区域形成新小区；
其中， 所述基站向节能小区发送激活节能指示， 具体为向满足节能激活要求的节能小 区发送激活节能指示。
5、 如权利要求 2 所述的方法， 其特征在于， 所述基站根据获取的所述负荷信息， 确 定满足节能激活要求时， 根据所述小区覆盖信息按预配置的功率及倾角提高发射功率， 来 扩大信号覆盖区域形成新小区， 具体包括： 所述基站根据其管理的节能小区的负荷信息的时间变化规律确定第一节能激活时间 段；
所述基站确定到达所述第一节能激活时间段的开始时间时， 满足节能激活要求； 所述基站根据所有节能小区的小区覆盖信息， 按预配置的功率及全向角提高发射功 率， 来扩大信号覆盖区域形成新小区；
其中， 所述基站向节能小区发送激活节能指示， 具体为向其管理的所有节能小区发送 激活节能指示。
6、 如权利要求 2 所述的方法， 其特征在于， 在满足节能去激活要求时， 若所述基站 管理的节能小区去激活节能状态， 所述基站将用户切换到所述节能小区并缩小信号覆盖区 域， 具体包括：
所述基站根据自身的负荷信息确定满足节能去激活要求时， 向所述基站管理的节能小 区发送去激活节能指示， 指示节能小区去激活节能状态；
在所述基站管理的节能小区接收到节能去激活指令并去激活节能状态后， 所述基站将 用户切换到节能小区上， 并通过调整倾角和降低发射功率缩小信号覆盖区域。
7、 如权利要求 1 所述的方法， 其特征在于， 在满足节能激活要求时， 基站扩大信号 覆盖区域形成新小区， 以使所述基站管理的节能小区将用户切换到所述新小区并激活节能 状态， 具体包括：
所述基站根据操作管理与维护 OAM配置的扩大覆盖区时间段， 确定到达所述扩大覆 盖区时间段的开始时间时， 满足节能激活要求， 并按 OAM配置的功率及倾角提高发射功 率， 来扩大信号覆盖区域形成新小区； 以使所述基站管理的节能小区根据 OAM配置的第 二节能激活时间段，确定到达所述第二节能激活时间段的开始时间时，满足节能激活要求， 并由满足节能激活要求的节能小区将用户切换到新小区并激活节能状态。
8、 如权利要求 7 所述的方法， 其特征在于， 在满足节能去激活要求时， 若所述基站 管理的节能小区去激活节能状态， 所述基站将用户切换到所述节能小区并缩小信号覆盖区 域， 具体包括：
若所述基站管理的节能小区根据 OAM配置的节能去激活时间段， 确定到达所述节能 去激活时间段的开始时间时，满足节能激去活要求，且由满足节能去激活要求的节能小区， 去激活节能状态； 则所述基站根据 OAM配置的缩小覆盖区时间段， 确定到达所述缩小覆 盖区时间段的开始时间时， 满足节能去激活要求， 并将用户切换到所述节能小区， 完成切 换后根据 OAM的配置缩小信号覆盖区域。
9、 如权利要求 1~8任一所述的方法， 其特征在于， 所述基站扩大信号覆盖区域形成 新小区之后， 还包括：
所述基站更新所述新小区的邻小区及其相应参数；
所述基站根据接收的更新后的邻小区的无线链路失败及切换相关信息， 通过调整发射 功能优化扩大后的覆盖区域；
所述基站在缩小信号覆盖区域之后， 还包括：
所述基站更新缩小后的覆盖区域的邻小区及其相应参数；
所述基站根据接收的更新后的邻小区的无线链路失败及切换相关信息， 通过调整发射 功能优化缩小后的覆盖区域。
10、 如权利要求 2~6任一所述的方法， 其特征在于， 所述基站向节能小区发送激活节 能指示， 具体包括：
通过与邻基站间的 X2接口发送小区去激活请求信令， 向节能小区发送激活节能指示， 或
通过与移动管理实体 MME间的 S1接口向 MME发送节能消息， 由所述 MME根据所 述节能消息向节能小区发送激活节能指示。
11、 一种进行节能补偿操作的基站， 其特征在于， 包括：
节能补偿单元， 用于在满足节能激活要求时， 扩大基站的信号覆盖区域形成新小区， 以使所述基站管理的节能小区能够将用户切换到所述新小区并激活节能状态；
节能去补偿单元， 用于在满足节能去激活要求， 且所述基站管理的节能小区去激活节 能状态时， 将用户切换到所述节能小区并缩小基站的信号覆盖区域。
12、 如权利要求 11所述的基站， 其特征在于， 所述节能补偿单元包括：
信息获取单元， 用于获取基站管理的节能小区的小区覆盖信息和负荷信息； 第一扩大单元， 用于根据获取的所述负荷信息， 确定满足节能激活要求时， 根据所述 小区覆盖信息按预配置的功率及倾角提高发射功率， 来扩大基站的信号覆盖区域形成新小 区；
指示激活单元， 用于向节能小区发送激活节能指示， 指示节能小区将用户切换到新小 区并激活节能状态。
13、 如权利要求 12 所述的基站， 其特征在于， 所述信息获取单元， 具体用于从操作 管理与维护 OAM, 或通过所述基站与邻基站间接口获取节能小区的小区覆盖信息； 通过 所述基站与邻基站间接口获取节能小区的负荷信息。
14、 如权利要求 12所述的基站， 其特征在于， 所述第一扩大单元， 具体包括： 节能小区确定单元， 用于根据获取的所述负荷信息， 结合本地设置确定满足节能激活 要求的节能小区；
部分覆盖单元， 用于根据满足节能激活要求的节能小区的小区覆盖信息， 按预配置的 功率及倾角提高发射功率， 来扩大基站信号覆盖区域形成新小区；
所述指示激活单元， 具体为向满足节能激活要求的节能小区发送激活节能指示。
15、 如权利要求 12所述的基站， 其特征在于， 所述第一扩大单元， 具体包括： 第一时间段确定单元， 用于根据所述基站管理的节能小区的负荷信息的时间变化规律 确定第一节能激活时间段；
第一满足要求确定单元， 用于确定到达所述第一节能激活时间段的开始时间时， 满足 节能激活要求；
全向覆盖单元， 用于根据所有节能小区的小区覆盖信息， 按预配置的功率及全向角提 高发射功率， 来扩大基站的信号覆盖区域形成新小区；
所述指示激活单元， 具体为向所述基站管理的所有节能小区发送激活节能指示。
16、 如权利要求 12所述的基站， 其特征在于， 所述节能去补偿单元， 具体包括： 指示去激活单元， 用于根据基站的负荷信息确定满足节能去激活要求时， 向所述基站 管理的节能小区发送去激活节能指示， 指示节能小区去激活节能状态；
第一缩小单元， 用于在所述节能小区去激活节能状态后， 将用户切换到所述节能小区 上， 并通过调整倾角和降低发射功率缩小基站的信号覆盖区域。
17、 如权利要求 11所述的基站， 其特征在于， 所述节能补偿单元， 具体包括： 第二满足要求确定单元， 用于根据操作管理与维护 OAM配置的扩大覆盖区时间段， 确定到达所述扩大覆盖区时间段的开始时间时， 满足节能激活要求；
第二扩大单元， 用于按 OAM配置的功率及倾角提高发射功率， 来扩大基站的信号覆 盖区域形成新小区，以使所述基站管理的节能小区根据 OAM配置的第二节能激活时间段， 确定到达所述第二节能激活时间段的开始时间时， 满足节能激活要求， 并由满足节能激活 要求的节能小区将用户切换到新小区并激活节能状态。
18、 如权利要求 17所述的基站， 其特征在于， 所述节能去补偿单元， 具体包括： 第三满足要求确定单元， 用于根据 OAM配置的缩小覆盖区时间段， 确定到达所述缩 小覆盖区时间段的开始时间时， 满足节能去激活要求；
第二缩小单元， 用于将用户切换到所述节能小区， 完成切换后才 居 OAM的配置缩小 信号覆盖区域。
19、 如权利要求 11 18任一所述的基站， 其特征在于， 还包括：
第一邻区更新单元， 用于在扩大基站的信号覆盖区域形成新小区之后， 更新所述新小 区的邻小区及其相应参数；
第一优化单元， 用于根据接收的更新后的邻小区的无线链路失败及切换相关信息， 通 过调整发射功能优化扩大后的覆盖区域；
第二邻区更新单元， 用于在缩小信号覆盖区域之后， 更新缩小后的覆盖区域的邻小区 及其相应参数；
第二优化单元， 用于根据接收的更新后的邻小区的无线链路失败及切换相关信息， 通 过调整发射功能优化缩小后的覆盖区域。
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US8543116B2 (en) 2013-09-24
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