WO2012174824A1 - Procédé de synchronisation, procédé d'accès et dispositifs pour obtenir des informations de charge relatives à des cellules ayant la même couverture - Google Patents

Procédé de synchronisation, procédé d'accès et dispositifs pour obtenir des informations de charge relatives à des cellules ayant la même couverture Download PDF

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Publication number
WO2012174824A1
WO2012174824A1 PCT/CN2011/082589 CN2011082589W WO2012174824A1 WO 2012174824 A1 WO2012174824 A1 WO 2012174824A1 CN 2011082589 W CN2011082589 W CN 2011082589W WO 2012174824 A1 WO2012174824 A1 WO 2012174824A1
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Prior art keywords
cell
base station
load value
integrated load
access
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PCT/CN2011/082589
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English (en)
Chinese (zh)
Inventor
赵毅敏
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中兴通讯股份有限公司
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Publication of WO2012174824A1 publication Critical patent/WO2012174824A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a synchronization method, an access method, and a device for overlaying cell load information. Background technique
  • the environment of wireless networks is becoming more and more complex, and the same area may be covered by multiple wireless networks, that is, existing coverage areas, especially in urban areas and hotspot areas.
  • the wireless coverage of the same coverage area (referred to as the coverage area) in the same area is often unbalanced, resulting in waste of network resources and a decline in user experience.
  • the embodiment of the invention provides a synchronization method and an access method for the same coverage cell load information, so as to solve the problem that the radio resources in the existing coverage cell are not balanced.
  • the embodiment of the present invention further provides a synchronization device and an access device that cover the cell load information.
  • a method for synchronizing load information of a covered cell includes: The radio network controller acquires radio resource load, base station interference parameter, and base station transmit power parameter of each cell under the jurisdiction of the coverage cell, and calculates its own according to the acquired radio resource load, base station interference parameter, and base station transmit power parameter.
  • the comprehensive load value of each cell under the jurisdiction is stored;
  • the radio network controller determines that there is a cell under the jurisdiction of another radio network controller in the same coverage cell, it synchronizes the calculated integrated load value of each cell under its jurisdiction to other radio network controllers, and receives and stores other cells.
  • the integrated load value of the wireless network controller synchronization.
  • the radio network controller selects to access the first UE or the other second cell in the same coverage cell according to the integrated load value of each cell in the same coverage cell;
  • the integrated load value of each cell in the same coverage cell is obtained by:
  • the radio network controller acquires radio resource load, base station interference parameter, and base station transmit power parameter of each cell under the jurisdiction of the coverage cell, and calculates its own according to the acquired radio resource load, base station interference parameter, and base station transmit power parameter.
  • the comprehensive load value of each cell under the jurisdiction is stored;
  • the radio network controller determines that there is a cell under the jurisdiction of another radio network controller in the same coverage cell, it synchronizes the calculated integrated load value of each cell under its jurisdiction to other radio network controllers, and receives and stores other cells.
  • the integrated load value of the wireless network controller synchronization.
  • the embodiment of the present invention further provides a synchronization device that covers the cell load information, and includes: a calculation unit, configured to acquire radio resource load, base station interference parameter, and base station of each cell managed by the radio network controller in the coverage cell Transmitting power parameters, and calculating comprehensive load values of each cell according to the obtained radio resource load, base station interference parameters, and base station transmit power parameters, and storing; a synchronization unit, configured to: when it is determined that there is a cell under the jurisdiction of another radio network controller in the same coverage cell, synchronize the integrated load value of each cell calculated by the calculation unit to another radio network controller, and receive and store other cells.
  • the integrated load value of the wireless network controller synchronization.
  • An embodiment of the present invention further provides an access device for a coverage cell, including:
  • a receiving unit configured to receive a request that the first UE sends an access to the first cell in the coverage cell
  • An access unit configured to select to access the first UE or another second cell in the same coverage cell according to the integrated load value of each cell in the same coverage cell;
  • the integrated load value of each cell in the same coverage cell is obtained by:
  • the access device of the coverage cell acquires the radio resource load, the base station interference parameter, and the base station transmit power parameter of each cell in the same coverage cell, and according to the acquired radio resource load, the base station interference parameter, and the base station transmit power parameter, Calculate the comprehensive load value of each cell under its jurisdiction and store it;
  • the calculated integrated load value of each cell under its jurisdiction is synchronized to other radio network controllers, and other radio network controllers are received and stored. Synchronized integrated load value.
  • the method for synchronizing the same coverage cell load information, the access method and the device provided by the embodiment of the present invention, and calculating the comprehensive load of each cell in the same coverage cell according to the acquired radio resource load, the base station interference parameter, and the base station transmit power parameter The value, and the calculated integrated load value is synchronized to other radio network controllers that are in the same coverage area.
  • the UE is based on the integrated load value of each cell in the coverage cell and the set policy.
  • the access is selected to the cell requesting access and other cells in the same coverage cell.
  • the calculated integrated load value is obtained by comprehensively considering radio resource load, base station transmit power, base station interference and other radio resources, a unified standard quantization is implemented for the radio resource load of the same coverage cell, so that the parameter can be utilized. According to the different load conditions of the coverage cell, the UEs that are to be accessed are selected and accessed between different coverage cells, and the balance of the radio resource load is effectively realized between the coverage cells.
  • FIG. 1 is a schematic flowchart of a method for synchronizing load information of a covered cell according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a method for accessing a same coverage cell according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a first UE selecting access according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a first embodiment of the present invention
  • FIG. 6 is a schematic flowchart diagram of Embodiment 2 according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic flowchart diagram of Embodiment 3 according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a synchronization device for overlaying cell load information according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a computing unit according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of an access device of a same coverage cell according to an embodiment of the present invention
  • FIG. 11 is a schematic structural diagram of an access unit according to an embodiment of the present invention
  • FIG. 12 is a schematic structural diagram of selecting an access unit according to an embodiment of the present invention. detailed description
  • the method for synchronizing the same coverage cell load information provided by the embodiment of the present invention is as shown in FIG. 1 , and the specific process includes:
  • the radio network controller acquires radio resource load, base station interference parameter, and base station transmit power parameter of each cell in the same coverage cell, and according to the obtained radio resource.
  • the load, the base station interference parameter, and the base station transmit power parameter calculate and store the integrated load value of each cell under its jurisdiction;
  • the radio network controller determines whether there is a cell under the jurisdiction of the other radio network controller in the same coverage cell; if yes, execute S103; otherwise, execute S104;
  • the radio network controller synchronizes the calculated integrated load value of each cell under its jurisdiction to other radio network controllers, and receives and stores the integrated load value synchronized by the other radio network controllers.
  • the purpose of calculating and storing the integrated load value of each cell under its jurisdiction is to: perform unified standard quantization on the radio resource condition of the cell controlled by each radio network controller, so that the user equipment (UE) can access the same coverage.
  • UE user equipment
  • the radio network controller acquires one or more parameters of the radio resource load, the base station interference parameter, or the base station transmit power parameter of the managed cell, the following steps are performed:
  • the radio network controller acquiring the updated radio resource load, the base station interference parameter or the base station transmit power parameter of the cell in the coverage cell, recalculating the integrated load value of the cell, and using the recalculated integrated load value update The combined load value of the stored cell;
  • the radio network controller synchronizes the recalculated integrated load values to other wireless network controllers.
  • the process of obtaining the relevant parameters in the foregoing S101, and calculating the comprehensive load value of each cell specifically includes the following steps:
  • the weight values of the radio resource occupation ratio, the base station interference ratio, and the base station transmit power ratio of different cells in the same coverage cell may be different according to the network planning and network optimization results of the cell. Settings.
  • the above calculated integrated load value can be expressed in percentage form.
  • the base station transmitting radio power, the base station interference, and the radio resource occupation ratio can be integrated to obtain a value that can reflect the use of the radio resource in the same coverage cell, that is, the integrated load value, so that it is convenient to be between different coverage cells. Selecting to access the UE to be accessed or handover to the online UE effectively balances the use of radio resources in the same coverage cell.
  • the radio network controller receives a request initiated by a certain UE to access a certain cell in the coverage cell (hereinafter referred to as a first cell for convenience of discussion), then the access method of the following coverage cell is provided by the embodiment of the present invention.
  • the UE that initiates the access request is referred to as a first UE, and the cell that the first UE requests to access is referred to as a first.
  • a cell, other than the first cell in the same coverage cell, is referred to as a second cell.
  • the method may include the following steps:
  • the radio network controller receives, by the first UE, a request that the first UE sends an access to the first cell in the coverage cell.
  • the radio network controller in accordance with the comprehensive coverage cell stored load value of each cell, selecting a first cell to the first UE or the access cover with a second cell in the other cells.
  • the integrated load value of each cell of the same coverage cell that is stored by the radio network controller is obtained by using the synchronization method of the coverage cell load information provided in the embodiment of the present invention.
  • the first UE is selected to access the first cell or the other second cell in the same coverage cell, as shown in FIG. 3, by using the following process:
  • the first UE is connected to the first cell or the other second cell in the same coverage cell according to the preset policy.
  • the first type of policy is as shown in FIG. 4, and includes the following steps:
  • S401 Determine whether the integrated load value of each second cell in the same coverage cell reaches the resource early warning threshold of the corresponding d and the area. If the integrated load value of the at least one second cell is smaller than the corresponding resource early warning threshold, perform S402; Exist, execute S407 or S410;
  • the first UE is connected to the second cell with the lowest integrated load value or accesses the first cell.
  • the first UE is accessed to the first cell.
  • S409 The first UE is connected to the first cell or the first UE is decelerated and then accesses the first cell.
  • the determining whether the online UE or the first UE can access the cell at a reduced speed may be determined according to factors such as the multi-band capability, the multi-standard capability, the service type, the service priority, and the rate of the online UE or the first UE.
  • the second policy of the preset policy in S302 is similar to the first policy, and includes the following processes:
  • the sum of the integrated load value of the at least one second cell and the resource early warning offset is less than the corresponding resource early warning threshold, the sum of the combined load value and the resource early warning offset is less than the resource early warning threshold.
  • the second cell is sorted according to the sum of the integrated load value and the resource early warning offset, and the first UE is connected to the second cell with the lowest sum of the integrated load value and the resource early warning offset; or
  • the first UE is connected to the first cell, and if not, the first UE is connected to the first cell or the first UE is decelerated and then accesses the first cell; or
  • the determining whether the online UE or the first UE can access the cell at a reduced speed may be determined according to factors such as the multi-band capability, the multi-standard capability, the service type, the service priority, and the rate of the online UE or the first UE.
  • the setting of the resource early warning offset can avoid the ping-pong handover problem between the same coverage cells, and set the resource early warning offset of each cell in the coverage cell according to the wireless network planning and the result of the wireless network optimization, in the same coverage area.
  • the resource early warning offsets set by different cells may be different, so that the radio resource allocation has certain flexibility while sufficiently equalizing the radio resource load of the cells in the coverage cell.
  • the flow of the first example is as shown in FIG. 5.
  • the present example is an access method of the same coverage cell under the condition that the UE that requests the access cannot reduce the rate, and the specific process includes the following steps:
  • RRC radio resource control
  • RAB radio access bearer
  • S502 The radio resource management device determines whether the current cell integrated load value has reached or exceeded a preset resource early warning threshold. If the result is yes, execute S503, if the result is no, execute S508; S503: The radio resource management apparatus determines whether the sum of the integrated load value of the other cells in the same coverage cell and the resource early warning offset is greater than the resource early warning threshold; if the result is yes, execute S504, if the result is no, execute S506;
  • S504 judging whether there is an online UE that can reduce the rate according to the online UE service type, the service priority, and the rate in the current cell; if there is an online UE that can be decelerated, executing S505, if not, executing S508;
  • S507 The UE accesses the other cell with the smallest sum of the integrated load value and the resource early warning offset in the coverage cell, and exits the process;
  • S508 Access the UE to the current cell.
  • the access method of the same coverage cell includes the following steps:
  • S601 The UE initiates an RRC connection request or sends a RAB assignment message to the core network.
  • the radio resource management device determines whether the current cell comprehensive load value has reached or exceeds a preset resource early warning threshold. If the result is yes, execute S603, if the result is no, execute S609;
  • the radio resource management apparatus determines whether the sum of the integrated load value and the resource early warning offset of the other cells in the same coverage cell is greater than the resource early warning threshold; if the result is yes, execute S604, if the result is no, execute S606;
  • S604 According to factors such as an online UE service type, a service priority, and a rate in the current cell. Determining whether there is an online UE that can reduce the rate; if there is an online UE that can slow down, execute S605, if not, execute S609;
  • S607 Determine, according to factors such as whether the online UE of the current cell supports multiple standards, whether the multi-band is supported, the service type, the service priority, and the rate, determine whether there is an online connection to another cell that can access the same coverage cell.
  • UE if yes, execute S608, if not, execute S609;
  • S609 Access the UE to the current cell.
  • the process of the third embodiment is as shown in FIG. 7.
  • the present example is an access method of the same coverage cell when the UEs in the cell that the UE requests to access are not considered.
  • the specific process includes the following steps: S701: The UE initiates an RRC connection. Sending a RAB assignment message to the request or the core network;
  • S702 The RRC device determines whether the current cell comprehensive load value has reached or exceeded a preset resource early warning threshold. If the result is yes, execute S703. If the result is no, execute S708.
  • the radio resource management apparatus determines whether the sum of the integrated load value and the resource early warning offset of the other cells in the same coverage cell is greater than the resource early warning threshold; if the result is yes, execute S704, if the result is no, execute S706;
  • S704 determining, according to the service type, service priority, and rate of the requesting access to the UE, whether the rate can be decreased; if yes, executing S705, if not, executing S708; S705: After the UE is degraded by the radio bearer reconfiguration process in the prior art, executing S708;
  • S707 The UE accesses another cell in which the sum of the integrated load value and the resource early warning offset in the coverage cell is the smallest;
  • S708 Access the UE to the current cell.
  • the embodiment of the invention further provides a synchronization device for covering the cell load information, as shown in FIG. 8, which includes:
  • the calculating unit 801 is configured to acquire radio resource load, base station interference parameter, and base station transmit power parameter of each cell managed by the radio network controller in the coverage cell, and transmit the radio resource load, the base station interference parameter, and the base station according to the acquired radio resource load Power parameters, calculate the comprehensive load value of each cell and store it;
  • the synchronization unit 802 is configured to: when it is determined whether there is a cell that is controlled by another radio network controller in the same coverage cell, synchronize the integrated load value of each cell calculated by the calculation unit 801 to another radio network controller, and receive The combined load value that is synchronized with other wireless network controllers.
  • the obtaining sub-unit 8011 is configured to obtain a radio resource occupied by the UE and a radio resource configured for the cell, and a sum of radio resources configured for the cell;
  • the transmitting subunit 8012 is configured to send, by the base station that transmits the signal to the cell, a common measurement control command, where the common measurement control command indicates a base station interference value of the measurement cell and a base station transmit power.
  • the receiving subunit 8013 is configured to receive a public measurement report sent by the base station with the base station interference value of the cell and the base station transmit power.
  • the calculating sub-unit 8014 is configured to calculate a radio resource occupation ratio of the cell according to the radio resource occupied by the accessed UE of the cell and the sum of radio resources configured for the cell, and calculate a ratio of the interference value of the base station to the maximum interference value of the normal working of the base station.
  • Obtaining a base station interference ratio calculating a ratio of a base station transmit power to a base station maximum transmit power to obtain a base station transmit power ratio; according to each cell, a radio resource occupancy ratio, a base station interference ratio, a base station transmit power ratio, and a preset radio resource occupancy ratio, base station interference Calculating a comprehensive load value of the cell according to a weight value corresponding to a base station transmit power ratio;
  • the storage subunit 8015 is configured to store a radio resource occupation ratio, a base station interference ratio, a base station transmit power ratio, and an integrated load value.
  • the calculating unit 801 in the foregoing apparatus is further configured to: when acquiring the updated radio resource load, the base station interference parameter, and the base station transmit power parameter of the cell under the jurisdiction of the radio network controller in the coverage cell, according to the update The radio resource load, the base station interference parameter, and the base station transmit power parameter, recalculate the integrated load value of the cell, and update the stored integrated load value of the cell by using the recalculated integrated load value;
  • the synchronization unit 802 is also used to synchronize the recalculated integrated load values of the computing unit 801 to other radio network controllers.
  • the embodiment of the present invention further provides an access device of the same coverage cell, as shown in FIG. 10, including:
  • the receiving unit 1001 is configured to receive, by the first UE, a request for accessing the first cell in the coverage cell;
  • Access unit 1002 according to the integrated value with the load cell coverage of each cell stored, selecting a first cell to the first UE or the access cover with a second cell in the other cells.
  • the integrated load value of each cell in the same coverage cell is obtained by:
  • the access device of the coverage cell acquires the radio resource load, the base station interference parameter, and the base station transmit power parameter of each cell in the same coverage cell, and according to the acquired radio resource load, the base station interference parameter, and the base station transmit power parameter, Calculate the comprehensiveness of each cell under its jurisdiction Load value and store;
  • the calculated integrated load value of each cell under its jurisdiction is synchronized to other radio network controllers, and other radio network controllers are received and stored. Synchronized integrated load value
  • the access unit 1002 in the foregoing apparatus specifically includes: a determining unit 1101, configured to determine whether the integrated load value of the first cell reaches a preset resource early warning threshold of the first cell;
  • the determining access unit 1102 is configured to: when the determining unit 1101 determines that the result is yes, access the first UE to the first cell or the other second cell in the same coverage cell according to the preset policy; and the determining unit 1101 determines whether the result is NO. And accessing the first UE to the first cell.
  • the selective access unit 1102 specifically includes: a determining subunit 1201, a first selecting access subunit 1202, and a second selecting access subunit 1203;
  • the determining sub-unit 1201 is configured to determine whether the comprehensive load value of each second cell in the same coverage cell reaches the corresponding resource early warning threshold;
  • the first selection access sub-unit 1202 is configured to sort, according to the comprehensive load value, the second cells in the same coverage cell whose integrated load value is smaller than the resource early warning threshold, when the determination result of the determination sub-unit 1201 is negative.
  • the first UE is connected to another cell with the lowest integrated load value; or it is determined whether the online UE in the first cell can be switched to another cell, and if so, the online UE is switched to access the second cell with the lowest integrated load value. And accessing the first UE to the first cell; if not, accessing the first UE to the second cell with the lowest integrated load value or accessing the first cell;
  • the second selection access sub-unit 1203 is configured to determine, if the determination result of the sub-unit 1201 is YES, whether there is an online UE that can be decelerated in the first cell, and if yes, after decelerating the online UE that can be decelerated, The first UE is connected to the first cell, and if not, the first UE is connected to the first cell or the first UE is decelerated and then accesses the first cell; or whether the first UE can be slowed down to access the first cell. a cell, if yes, the first UE is decelerated to access the first cell, and if not, the first UE is accessed to the first small Area.
  • the determining subunit 1201 is configured to determine whether the sum of the integrated load value of each second cell in the same coverage cell and the corresponding resource early warning offset reaches a corresponding resource early warning threshold;
  • the first selection access sub-unit 1202 is further configured to: when the determining sub-unit 1201 determines that the result is no, the second cell in the same coverage cell whose sum of the integrated load value and the resource early warning offset is less than the resource early warning threshold. And sorting according to the sum of the integrated load value and the resource early warning offset, and connecting the first UE to another cell with the lowest sum of the integrated load value and the resource early warning offset; or determining whether the online in the first cell can be The UE switches to access other cells, and if yes, switches the online UE to the second cell with the lowest sum of the integrated load value and the resource early warning offset, and accesses the first UE to the first cell; if not, the first cell The UE accesses the second cell with the lowest sum of the integrated load value and the resource early warning offset or accesses the first cell;
  • the second selection access sub-unit 1203 is configured to determine, if the determination result of the sub-unit 1201 is YES, whether there is an online UE that can be decelerated in the first cell, and if yes, after decelerating the online UE that can be decelerated.
  • the first UE is connected to the first cell, and if not, the first UE is connected to the first cell or the first UE is decelerated and then accesses the first cell; or whether the first UE can be slowed down.
  • a cell if applicable, deactivates the first UE to access the first cell, and if not, accesses the first UE to the first cell.
  • the method for synchronizing the same coverage cell load information, the access method and the device provided by the embodiment of the present invention, and calculating the comprehensive load of each cell in the same coverage cell according to the acquired radio resource load, the base station interference parameter, and the base station transmit power parameter The value, and the calculated integrated load value is synchronized to other radio network controllers that are in the same coverage area.
  • the UE is based on the integrated load value of each cell in the coverage cell and the set policy.
  • the access is selected to the cell requesting access and other cells in the same coverage cell.
  • the radio resource load situation of the coverage cell is uniformly quantized, so that the parameter can be used to select the UE to be accessed between different coverage cells according to the different load conditions of the coverage cell.
  • the balance of radio resource load is effectively realized between cells.
  • the method for synchronizing the same coverage cell load information, the access method and the device provided by the embodiment of the present invention, and calculating the comprehensive load of each cell in the same coverage cell according to the acquired radio resource load, the base station interference parameter, and the base station transmit power parameter The value, and the calculated integrated load value is synchronized to other radio network controllers that are in the same coverage area.
  • the UE is based on the integrated load value of each cell in the coverage cell and the set policy.
  • the access is selected to the cell requesting access and other cells in the same coverage cell.
  • the calculated integrated load value is obtained by comprehensively considering radio resource load, base station transmit power, base station interference and other radio resources, a unified standard quantization is implemented for the radio resource load condition of the same coverage cell, so that the parameter can be utilized according to With different load conditions of the coverage cell, the UEs that are to be accessed are selected and accessed between different coverage cells, and the balance of the radio resource load is effectively realized between the coverage cells.

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Abstract

La présente invention se rapporte à un procédé de synchronisation, à un procédé d'accès et à des dispositifs adaptés pour obtenir des informations de charge relatives à des cellules ayant la même couverture. Le procédé selon l'invention consiste : à calculer, sur la base de l'acquisition d'informations de charge sur les ressources radio, de paramètres de brouillage d'une station de base et de paramètres de puissance de transmission d'une station de base, une valeur de charge intégrée de chaque cellule dans les cellules ayant la même couverture ; à synchroniser les valeurs de charge intégrée calculées par rapport à d'autres contrôleurs de réseau radio qui gèrent les cellules ayant la même couverture ; et, quand un UE demande l'autorisation d'accéder à une cellule, sur la base de la valeur de charge intégrée de chaque cellule dans les cellules ayant la même couverture et d'une politique définie, à autoriser l'UE à accéder sélectivement à la cellule requise ainsi qu'à d'autres cellules dans les cellules ayant la même couverture. Comme la valeur de charge intégrée calculée est obtenue en prenant globalement en compte les conditions de ressources radio au nombre desquelles les informations de charge sur les ressources radio, la puissance de transmission de la station de base et le brouillage de la station de base, il est possible de quantifier les conditions de charge sur les ressources radio des cellules ayant la même couverture sur la base de normes unifiées. D'autre part, les UE qui demandent l'autorisation d'accéder aux cellules sont autorisés à accéder sélectivement à des cellules parmi les différentes cellules ayant la même couverture. De cette manière, la solution technique décrite dans la présente invention est apte à équilibrer de façon efficace les charges sur les ressources radio parmi les cellules ayant la même couverture.
PCT/CN2011/082589 2011-06-22 2011-11-22 Procédé de synchronisation, procédé d'accès et dispositifs pour obtenir des informations de charge relatives à des cellules ayant la même couverture WO2012174824A1 (fr)

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CN106341853A (zh) * 2015-07-10 2017-01-18 中兴通讯股份有限公司 一种实现切换的方法、装置和基站
CN107318124B (zh) * 2016-04-26 2019-11-05 南京中兴软件有限责任公司 一种小区切换方法及装置
CN107708177A (zh) * 2016-08-09 2018-02-16 北京信威通信技术股份有限公司 一种移动终端接入的方法及装置
CN110210693B (zh) * 2019-02-18 2021-10-12 德州新动能铁塔发电有限公司 一种水氢发电移动供电车智能调配系统及其方法
CN111010725B (zh) * 2019-12-12 2023-04-11 中国移动通信集团内蒙古有限公司 小区的节能控制方法、装置、设备及介质

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