WO2011029226A1 - 一种扁平化移动通信网络的寻呼***及方法 - Google Patents

一种扁平化移动通信网络的寻呼***及方法 Download PDF

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Publication number
WO2011029226A1
WO2011029226A1 PCT/CN2009/073857 CN2009073857W WO2011029226A1 WO 2011029226 A1 WO2011029226 A1 WO 2011029226A1 CN 2009073857 W CN2009073857 W CN 2009073857W WO 2011029226 A1 WO2011029226 A1 WO 2011029226A1
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WIPO (PCT)
Prior art keywords
paging
enhanced base
base station
paging message
location area
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Application number
PCT/CN2009/073857
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English (en)
French (fr)
Inventor
王欣晖
李靖
唐雪
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to PCT/CN2009/073857 priority Critical patent/WO2011029226A1/zh
Publication of WO2011029226A1 publication Critical patent/WO2011029226A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • 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
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a paging system and method for flattening a mobile communication network.
  • FIG. 1 is a schematic diagram of a network architecture and an interface of a conventional Global System for Mobile Communications (GSM) system.
  • GSM Global System for Mobile Communications
  • the traditional GSM system mainly includes three layers: the core network, the base station controller (BSC), and the base station (Base Transceiver Station, BTS).
  • BSC base station controller
  • BTS Base Transceiver Station
  • one core network administers a plurality of base station controllers, and the base station control M and the base station controller N are shown in the figure;
  • one base station controller administers a plurality of base stations, wherein the base station controller M administers the base stations M1 and the base stations M2, and the base station controls The N is controlled by the base station N1 and the base station N2;
  • one base station further administers a plurality of mobile terminals (MSs).
  • MSs mobile terminals
  • one base station each administers an MS as an example
  • the base station M1 governs the mobile terminal Mi l
  • the base station M2 governs the mobile terminal.
  • M21 the base station N1 governs the mobile terminal N11 and the base station N2 governs the mobile terminal N211.
  • both the BSC and the BTS belong to the Base Station System (BSS).
  • BSS Base Station System
  • the interface between the core network and the BSC is called the A interface.
  • the interface between the BSC and the BTS is called the Abis interface.
  • the interface between the BTS and the MS is called the Um interface.
  • the core network, BSC and BTS work together to provide complete mobile voice service capabilities to the MS.
  • the core network has a base station controller 1, a base station controller 2, and a base station controller 3, wherein the base station controller 1 has a base station 11, a base station 12, ... and a base station lm, a total of m base stations;
  • the device 2 has a base station 21, ... and a base station 2n for a total of n base stations;
  • the base station controller 3 has a base station 31... and a base station 3k for a total of k base stations.
  • the base station 12 has a mobile terminal.
  • the core network needs to page the mobile terminal in the idle mode to complete the establishment of the voice service.
  • the core network sends a paging message to the device through the A interface based on the location area information.
  • the BSCs belonging to the same location area may be one or more.
  • the BSC After receiving the Paging message sent by the core network, the BSC sends the paging message to all the base stations it manages through the Abis interface.
  • the base station controller 1 sends the paging message to the base station 11 and the base station 12. , ... and the base station lm.
  • the base station 12 sends the paging message to the mobile terminal through the Um interface according to the processing of a certain paging group.
  • the number of paging messages that the A interface needs to transmit is equal to the number of all BSCs belonging to the same location area. In general, this number is limited, and the number of BSCs that generally belong to the same location area will not exceed 10. Therefore, the number of paging messages on the A interface generally does not have a very large load.
  • FIG. 3 is a schematic diagram of an existing flat GSM network architecture and interface.
  • the existing flattened GSM network mainly includes two layers of a core network and an enhanced base station (eBTS), wherein an interface between the core network and the enhanced base station is an A interface, and the enhanced base station and the enhanced base station are The interface between the mobile terminals is an Um interface.
  • eBTS enhanced base station
  • each enhanced base station is shown by the enhanced base station 1, the enhanced base station 2, the enhanced base station 3, and the enhanced base station 4, and each mobile terminal is shown by the mobile terminal 11, the mobile terminal 21, the mobile terminal 31, and the mobile terminal 11. .
  • the core network and the enhanced base station work together to provide the complete mobile voice service function to the MS.
  • the core network when the mobile terminal is used as the called voice service, the core network also sends the paging message to the eBTS belonging to the same location area through the A interface based on the location area information, eBTS Then, according to the processing of a certain paging group, the paging message is sent to the MS through the Um interface.
  • the number of paging messages that the A interface needs to transmit is equal to the number of all eBTSs belonging to the same location area. In general, the number of eBTSs can reach hundreds or even hundreds.
  • the core network directly sends the paging message to the eBTS. Since the number of eBTSs in the same location area is much larger than the number of BSCs in the traditional network, the core network needs to be flat after the communication network is flattened. The paging message sent will be greatly increased, resulting in an increase in the core network load. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a paging system and method for flattening a mobile communication network for flattening paging of a mobile communication network.
  • the present invention provides a paging method for a flat mobile communication network, which is used for a core network to initiate paging to an enhanced base station in a location area, the method comprising:
  • all the enhanced base stations in the location area are divided into two layers, the first layer includes at least one of the enhanced base stations, and the second layer includes at least one enhanced base station.
  • the core network sends the paging message to another enhanced base station in the first layer to complete the paging.
  • each enhanced base station in the first layer stores the affiliation relationship between all enhanced base stations in the location area and the respective jurisdictions; and the one enhanced base station according to the jurisdiction The relationship forwards the paging message to the target cell, or forwards the paging message to the remaining enhanced base stations in the location area according to the jurisdiction relationship.
  • a priority order is set for one or more enhanced base stations in the location area, and the core network sends the paging message to the enhanced base station with the highest priority order in the normal working state.
  • the paging message carries indication information indicating that the paging is for the entire location area, and the enhanced base station forwards the paging message to the location area according to the indication information. All other enhanced base stations.
  • the present invention also provides a core network of a flat mobile communication network for initiating paging to an enhanced base station in a location area, where:
  • the core network sends a paging message to one of the enhanced base stations in the location area.
  • the core network is configured to be in an abnormal working state of the one enhanced base station.
  • the paging message is sent to another enhanced base station to complete the paging.
  • the present invention also provides a paging system for a flat mobile communication network, including a core network and an enhanced base station, wherein:
  • the core network is configured to send a paging message to one of the enhanced base stations in a location area; the one enhanced base station is configured to forward the paging message directly to the target cell of the paging, or The paging message forwards the remaining enhanced base stations in the location area;
  • the remaining enhanced base stations are arranged to forward the paging message directly to the target cell.
  • all enhanced base stations in the location area are set to two layers, the first layer includes at least one of the enhanced base stations, and the second layer includes at least one enhanced base station.
  • the core network is configured to send the paging message to another enhanced base station in the first layer to complete the paging when the enhanced base station is in an abnormal working state.
  • each enhanced base station in the first layer stores the affiliation relationship between all enhanced base stations in the location area and the respective jurisdictions; and the one enhanced base station according to the jurisdiction The relationship forwards the paging message to the target cell, or forwards the paging message to the remaining enhanced base stations in the location area according to the jurisdiction relationship.
  • one or more enhanced base stations in the location area are set in a priority order, and the core network is arranged to send the paging message to the highest priority and enhanced base station in a normal working state.
  • the paging message is provided with indication information indicating that the paging is for the entire location area, and the enhanced base station is configured to forward the paging message to the All other enhanced base stations in the location area.
  • the core network sends a paging message to an eBTS in the location area, and then forwards the paging message between the eBTS and all other eBTSs in the location area to complete the purpose of the core network to page the target cell in the location area.
  • the eBTS in the first layer uses the active/standby working mechanism to improve the success rate of paging.
  • the technical solution of the present invention is applicable to a network in which eBTS is divided into two layers, which greatly simplifies the calculation amount of the paging forwarding module and improves work efficiency.
  • the paging system and method in a flat mobile communication network provided by the invention substantially reduces the core compared to the existing non-flat communication network Heart network A port signaling load.
  • Figure 1 is a schematic diagram of the architecture and interface of a conventional GSM network
  • FIG. 2 is a schematic diagram of paging in a location area in a conventional GSM network
  • FIG. 3 is a schematic diagram of a conventional flat GSM network architecture, interface, and location area paging;
  • FIG. 4 is a schematic diagram of an eBTS layered network in the same location area after the GSM network is flattened;
  • FIG. 5 is a paging in the first embodiment of the present invention. Schematic diagram of the dissemination rules;
  • FIG. 7 is a schematic diagram of another layer of eBTS in the same location area after the GSM network is flattened;
  • FIG. 8 is a schematic diagram of a paging propagation rule in the second embodiment of the present invention.
  • FIG. 10 is a schematic diagram of another paging propagation rule according to a second embodiment of the present invention.
  • FIG. 11 is another signaling flowchart of a second embodiment of the present invention. Preferred embodiment of the invention
  • the core idea of the present invention is that when the core network in the flat mobile communication network initiates paging for a certain location area, only the paging message is sent to an eBTS in the location area, and then the eBTS of the paging message is received.
  • the paging message is forwarded to all eBTSs in the location area that do not receive the paging message directly from the core network.
  • all the eBTSs in the location area can receive the paging message sent by the core network, and finally the eBTS forwards the paging message to each cell under the jurisdiction of each eBTS. At this time, each cell is a target cell.
  • the eBTS to which the single target cell belongs can also receive the paging message and complete the paging of the target cell.
  • the core network sends a paging message to an eBTS, for example, eBTS1, and the eBTS1 forwards the paging message to the remaining eBTSs.
  • the eBTS (here, eBTS1) that directly receives the paging message sent by the core network
  • the eBTS can be adjusted according to the specific situation. For example, when the eBTS1 fails, the core network can send the paging message to another eBTS, for example. eBTS2, and then the eBTS2 forwards the paging message to all eBTSs in the location area that do not receive the paging message directly from the core network.
  • the network element in the mobile communication system (for example, flat GSM, etc.) in which the paging mode can be implemented in the embodiment of the present invention mainly includes a core network and an eBTS.
  • the connection relationship (including the message interaction relationship) of each network element entity will be described in detail later when the method of the present invention is described.
  • a paging propagation rule for paging in a location area is first provided, that is, when the core network needs to perform paging on a certain location area, the core network is in the location area.
  • One of the eBTSs sends a paging message; after receiving the paging message, the eBTS forwards the paging message to the remaining eBTSs in the location area.
  • all eBTSs in the same location area in the network can be divided into two layers, a first layer and a second layer, wherein the first layer has only one eBTS, except for the eBTS of the first layer.
  • the remaining eBTSs in the location area are the second layer.
  • the location area has a total of 19 eBTSs, wherein one eBTS is one eBTS1 l, and the second eBTS is 18 eBTS 201 and eBTS 202 eBTS 218.
  • a paging message is sent to the eBTS of the first layer through the A port.
  • the core network sends a paging message to a layer of eBTSl.
  • the paging message may be accompanied by indication information to indicate that the paging is for the entire location area.
  • the eBTS 11 After receiving the paging message, the eBTS 11 needs to send a paging request (Paging Request) message on the Um interface to page the cell under its jurisdiction according to the prior art, and also needs to follow the defined paging propagation rule.
  • the enhanced inter-base station interface between the eBTS and the eBTS forwards the paging message to the layer 2 eBTS, that is, the eBTS1 needs to forward the paging message to the eBTS 201, the eBTS 202 eBTS 217 and the eBTS 218, respectively.
  • the port sends a paging request (Paging Request) message to page the cell under its jurisdiction.
  • the enhanced inter-base station interface can be used for interaction between the enhanced base station and the enhanced base station.
  • the paging request (Paging Request) message may be sent only on the Um interface; if the eBTS1 l determines that the target terminal of the paging is not in its own location In the cell of the jurisdiction, it is also possible to forward only the paging message to the Layer 2 eBTS without sending a Paging Request message on the Um interface.
  • Each enhanced base station includes an enhanced inter-base station interface function module, which is used to implement signaling interaction between the enhanced base stations; wherein the signaling includes the resource occupancy rate of the enhanced base station, and the enhanced base station
  • the information of each cell such as the cell identification number, the frequency, and the type of voice codec currently used, and the paging signaling that is forwarded between the base stations.
  • each enhanced base station can grasp the resource occupancy status and cell related information of the adjacent enhanced base station in time, and facilitates the use of finding a suitable target enhanced base station during handover.
  • the forwarding of the paging message through the enhanced inter-base station interface is implemented by the enhanced inter-base station interface function module on each enhanced base station.
  • the enhanced inter-base station interface function module on the enhanced base station implements forwarding paging signaling in multiple ways. The following two methods are listed:
  • the enhanced base station After receiving the paging signaling sent by the core network through the A interface, the enhanced base station directly forwards the paging signaling to other enhanced base stations based on the set paging forwarding rule. During the forwarding process, ⁇ Forwarding in a non-response manner, that is, when the forwarding enhanced base station transfers the paging command to other enhanced base stations, the other enhanced base stations are not required to give a response message after receiving the paging command to indicate that the paging message has been received. .
  • the enhanced base station After receiving the paging signaling sent by the core network through the A interface, the enhanced base station directly forwards the paging signaling to other enhanced base stations based on the set paging forwarding rule. In the forwarding process, the forwarding is performed in a acknowledgment manner, that is, when the forwarding enhanced base station transfers the paging command to other enhanced base stations, the other enhanced base station is required to give a response message after receiving the paging command to indicate that it has received To the paging message. When the paging signaling is forwarded, the forwarding enhanced base station starts a timer.
  • the paging signaling is considered as the paging signaling. If the transmission fails, the forwarding enhanced base station will send the paging signaling again until the maximum number of attempts is exceeded or a response message is received.
  • the Layer 2 eBTS After receiving the paging message, the Layer 2 eBTS needs to send a Paging Request message on the Um port according to the existing technical requirements. After the Layer 2 eBTS receives the paging message, all eBTSs in the location area have received the paging message.
  • FIG. 6 is a flow chart of paging propagation rule signaling for a certain location area in a flattened mobile network system according to an embodiment of the present invention, where the process mainly includes the following steps:
  • Step S610 The core network sends a paging (Paging) message to the eBTS, that is, the eBTS 11, to notify the layer eBTS to perform paging in the location area.
  • a paging (Paging) message to the eBTS, that is, the eBTS 11, to notify the layer eBTS to perform paging in the location area.
  • step S620 the layer eBTS forwards the paging message to the layer 2 eBTS through the enhanced inter-base station interface between the eBTS and the eBTS according to the defined paging propagation rule, and notifies the layer 2 eBTS to perform paging in the location area.
  • the paging message is transmitted to a fixed eBTS, and the paging message is forwarded to the remaining eBTSs.
  • the eBTS fails to forward the paging message, etc., it will affect the paging of the entire location area.
  • the second embodiment provides an optimized paging propagation rule based on the first embodiment.
  • the paging of the location area is implemented by setting a layer of the primary eBTS and a layer of the alternate eBTS.
  • all eBTSs of the location area are divided into two layers, i.e., the first layer and the second layer, in the network.
  • the location area has a total of 19 eBTSs, - 2 eBTSs and 17 eBTSs, and one eBTS is a primary eBTS, ie eBTS1 l and a spare eBTS. That is, eBTS12, the second layer eBTS are eBTS201, eBTS202 eBTS216 and BTS217, respectively.
  • Manner 1 The active eBTS performs continuous heartbeat detection on the inter-base station interface between the eBTS and the standby eBTS. If the standby eBTS does not check the heartbeat of the active eBTS, the primary eBTS is considered to be in the normal working state. The standby eBTS will send a message to the core network to inform the core network that the active eBTS is not working properly at this time, and the paging message should be sent to itself.
  • Manner 2 The core network performs continuous heartbeat detection on the A interface between the primary eBTS and the standby eBTS. If the core network does not check the heartbeat of the primary eBTS, the primary eBTS is considered to be in a normal working state. The call message is sent to the primary eBTS, and based on the heartbeat detection result of the standby eBTS, it is checked whether the paging message can be sent to the standby eBTS.
  • the core network when a primary eBTS, that is, eBTS1, is in a normal working state, when a certain user in the location area needs to be paged, the core network sends a paging (Paging) message to the layer through the A port.
  • the main uses eBTS.
  • the core network sends a paging message to a primary eBTS.
  • the paging message may be accompanied by indication information to indicate that the paging is for the entire location area.
  • the primary eBTS of the primary layer After receiving the paging message, the primary eBTS of the primary layer needs to send a paging request (Paging Request) message on the Um interface to page the cell under its jurisdiction according to the prior art, and also needs to follow the definition.
  • the paging propagation rule forwards the paging message to the layer 2 eBTS and the layer of the standby eBTS through the enhanced inter-base station interface between the eBTS and the eBTS, so that the layer 2 eBTS and the layer of the standby eBTS respectively complete the paging
  • the paging of the cell under the jurisdiction namely:
  • the primary eBTS ie eBTS1
  • the primary eBTS needs to forward the paging message to the Layer 2 eBTS 201, the Layer 2 eBTS 202 Layer 2 eBTS 17 and the Layer 2 eBTS 12, ie the eBTS 12 .
  • the Layer 2 eBTS and the Layer 2 standby eBTS need to send a Paging Request message on the Um port according to the technical requirements.
  • the paging message is received by the Layer 2 eBTS and the layer of the standby eBTS, all eBTSs in the location area have received the paging message.
  • FIG. 9 is a flow chart of paging propagation rule signaling for a certain location area in a flattened mobile network system according to an embodiment of the present invention, where the process mainly includes the following steps:
  • Step S910 The core network sends a paging (Paging) message to the primary eBTS through the A interface, and notifies the layer eBTS to perform paging in the location area.
  • Paging paging
  • Step S920 the layer-level eBTS sends the paging message to the layer 2 eBTS and the layer of the standby eBTS through the enhanced inter-base station interface between the eBTS and the eBTS according to the defined paging propagation rule, to notify the layer 2 eBTS and the layer.
  • the alternate eBTS performs paging of the location area.
  • the core network when a primary eBTS, that is, eBTS1, is in an abnormal working state, when a user in the location area needs to be paged, the core network sends a paging (Paging) message to the A through the A port.
  • the alternate eBTS of the layer As illustrated in Figure 10, the core network sends a paging message to a layer of alternate eBTS.
  • the paging message may be accompanied by indication information to indicate that the paging is for a paging of the entire location area.
  • a layer of the standby eBTS needs to send a paging request (Paging Request) message on the Um port according to the prior art, and also needs to enhance the eBTS and the eBTS according to the defined paging propagation rule.
  • the inter-base station interface forwards the paging (Paging) message to the layer 2 eBTS and the layer 1 eBTS, that is, the layer 1 eBTS needs to forward the paging message to the layer 2 eBTS1, the layer 2 eBTS2 layer 2 eBTS17 and the layer 1 main Use eBTS.
  • the Layer 2 eBTS and the primary eBTS need to send a Paging Request message on the Um interface according to the technical requirements. After both the Layer 2 eBTS and the primary eBTS receive the paging message, all eBTSs in the location area have received the paging message.
  • the call propagation rule signaling flow chart the process mainly includes the following steps:
  • Step S11A The core network sends a paging (Paging) message to the layer eBTS through the A interface, and notifies a layer of the standby eBTS to perform paging in the location area;
  • Paging paging
  • Step S11B The layer-by-layer eBTS sends a paging message to the attached Layer 2 eBTS and the layer 1 eBTS to notify the Layer 2 eBTS and the enhanced inter-base station interface between the eBTS and the eBTS according to the defined paging propagation rule.
  • the primary layer uses the eBTS to page the location area.
  • more than one layer of spare eBTSs such as eBTS 13, eBTS 14, and eBTS 15, may be provided in the second embodiment described above.
  • the core network sends a paging message to the eBTS12, and the eBTS12 forwards the message to the eBTS, including all the Layer 2 eBTSs and the remaining layer of the standby eBTS, and the remaining layer of the standby eBTS.
  • eBTS13, eBTS14, and eBTS15 when both eBTS1 and eBTS12 are in an abnormal working state, the core network sends a paging message to eBTS 13, which is forwarded by eBTS 13 to the remaining eBTSs; when eBTS1, eBTS12, and eBTS13 are both in non- In the normal working state, the core network sends a paging message to the eBTS 14, and the eBTS 14 forwards the paging message to the remaining eBTSs. It can be seen that when multiple standby eBTSs are set, it is more advantageous to ensure that all eBTSs can receive paging messages sent by the core network and reduce the load of the core network A signaling.
  • the priority order can be pre-set for all eBTSs.
  • the core network sends the paging message to the eBTS with the highest priority in the normal state, that is, the eBTS is the priority sequence of all the eBTSs in the normal working state. highest. Therefore, the foregoing second embodiment also sets a priority order of a primary eBTS and a standby eBTS in advance, and the primary eBTS of the one layer has a higher priority than the spare eBTS of the first layer.
  • the priority sequence may be pre-set by the primary eBTS and the one or more standby eBTSs, and the paging message is sent by the core network when the paging message is sent.
  • a priority order (one or more eBTSs in one layer) is pre-set for all eBTSs in a layer, which essentially sets a priority order for more than one enhanced base station in the same location area.
  • the foregoing first embodiment and the second embodiment are all pages of the core network for the entire location area, and the technical solution of the present invention is not limited thereto.
  • the technical solution of the present invention can also be implemented for paging for individual cells.
  • the core network is paging for all cells in the jurisdiction, in which all cells are the target cells of the paging; for the paging of the individual cells, the core network passes the eBTS to which the individual cell belongs.
  • a paging for the individual cell is implemented, at which point the individual cell is the target cell for paging.
  • the target cell in the present invention indicates the cell where the target terminal that the core network wants to page is located.
  • the eBTS in the same location area is divided into two layers, each layer has at least one eBTS, and each eBTS in the first layer stores all eBTSs in the location area and the jurisdictions of the respective jurisdictions.
  • the relationship includes the relationship between itself and the jurisdiction of the cell under its jurisdiction. Since the eBTSs in the first layer store the affiliation relationship between all eBTSs and the respective jurisdictions, any eBTS in the first layer can accurately find the jurisdictional target after receiving the paging message sent by the core network.
  • the eBTS of the cell The eBTS in the second layer may store its own affiliation with the cell under its jurisdiction, or may not store its own affiliation with the cell under its jurisdiction.
  • each eBTS in the first layer is set with a priority order.
  • the core network sends the paging message, the paging message is sent to the eBTS with the highest priority in the normal working state in the first layer.
  • the eBTS with the highest priority in the normal working state of the first layer When the eBTS with the highest priority in the normal working state of the first layer is in the target cell, it finds that the target cell belongs to its own jurisdiction according to the affiliation relationship stored in the first layer, and sends a paging request (Paging Request) on the Um interface. The message will complete the paging of the core network to the target cell.
  • Paging Request a paging request
  • the eBTS with the highest priority in the normal working state in the first layer determines that the target cell belongs to other eBTS jurisdictions according to the eBTS and the affiliation relationship of the cell, and then enhances the target cell.
  • the inter-base station interface forwards the paging message to the eBTS to which the target cell belongs (which may be another eBTS of one layer, or may be a layer 2 eBTS), and then sends a paging request on the Um interface by the eBTS to which the target cell belongs (Paging Request)
  • the message will complete the paging of the core network to the target cell.
  • modules or steps of the present invention described above can be implemented with a general purpose computing device, which can be centralized on a single computing device, or distributed. Alternatively, on a network of computing devices, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately Each integrated circuit module, or a plurality of modules or steps thereof, are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.
  • the core network sends a paging message to an eBTS in the location area during paging of the location area, and then forwards the paging between the eBTS and all other eBTSs in the location area.
  • the message can reach the purpose of receiving a paging message by some or some target cells in the location area.
  • the present invention provides a paging system and method in a flat mobile communication network, which substantially reduces the load of the core network A port signaling compared to the existing non-flat communication network.

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Description

一种扁平化移动通信网络的寻呼***及方法
技术领域
本发明涉及移动通信领域， 尤其涉及一种扁平化移动通信网络的寻呼系 统及方法。
背景技术
图 1为传统全球移动通信***（ Global System for Mobile Communications, GSM ) 的网络构架及接口示意图。 如图 1所示， 传统的 GSM***主要包括 核心网、基站控制器（ Base Station Controller, BSC )和基站（ Base Transceiver Station, BTS )三层。 其中， 一个核心网管辖若干基站控制器， 图中以基站控 制 M和基站控制器 N示出； 一个基站控制器管辖若干基站 , 图中以基站控制 器 M管辖基站 Ml和基站 M2,以及基站控制器 N管辖基站 N1和基站 N2示 出； 一个基站又管辖若干移动终端（Mobile Station, MS ) , 图中以一个基站 各管辖一个 MS为例， 基站 Ml管辖移动终端 Mi l , 基站 M2管辖移动终端 M21 , 基站 N1管辖移动终端 Nl 1以及基站 N2管辖移动终端 N211。
在传统的 GSM***的网络架构中， BSC和 BTS都属于基站***（ Base Station System, BSS )。 核心网和 BSC之间的接口称为 A接口， BSC与 BTS 间的接口称为 Abis接口， BTS与 MS间的接口称为 Um接口。 核心网、 BSC 和 BTS协同工作， 向 MS提供完整的移动话音服务功能。
图 2为传统 GSM网络中位置区寻呼示意图。如图 2所示，核心网辖有基 站控制器 1、基站控制器 2以及基站控制器 3 ,其中基站控制器 1辖有基站 11、 基站 12、 …以及基站 lm共 m个基站； ， 基站控制器 2辖有基站 21、 …以及 基站 2n共 n个基站； 基站控制器 3辖有基站 31...以及基站 3k共 k个基站。 基站 12辖有一移动终端。
在三层构架的 GSM网络中， 当进行移动终端作为被叫的话音业务时，核 心网需要寻呼处于空闲模式下的移动终端以完成话音业务的建立。 一般情况 下， 核心网会基于位置区信息将寻呼（Paging ) 消息通过 A接口下发给属于 同一位置区的所有 BSC (即图 2中的基站控制器 1、 基站控制器 2及基站控 制器 3 ) , 属于同一位置区的 BSC可以是一个也可以是多个。 BSC收到核心 网下发的寻呼（ Paging ) 消息后， 会通过 Abis接口将寻呼消息下发给其管理 的所有基站， 比如基站控制器 1将寻呼消息下发给基站 11、 基站 12、 …以及 基站 lm。 其中的基站 12再按照一定的寻呼组的处理， 将寻呼消息通过 Um 接口发送给移动终端。
由此可以看出，三层构架的传统 GSM网络中，对于每一个移动终端作为 被叫的话音业务来说， A接口需要发送的寻呼消息数目等于属于同一位置区 的所有 BSC的数目。 一般情况下， 这个数目是有限的， 一般属于同一个位置 区的 BSC数目不会超过 10个。 因此， A接口的寻呼消息数量一般不会有非 常大的负荷。
图 3为现有的扁平化 GSM网络构架及接口示意图。如图 3所示，现有的 扁平化 GSM 网络主要包括核心网和增强型基站 （ Enhanced Base Station , eBTS )两层， 其中核心网与增强型基站之间的接口为 A接口， 增强型基站与 移动终端之间的接口为 Um接口。 图中以增强型基站 1、 增强型基站 2、 增强 型基站 3及增强型基站 4示出各增强型基站， 以移动终端 11、 移动终端 21、 移动终端 31及移动终端 11示出各移动终端。
核心网和增强型基站协同工作， 向 MS提供完整的移动话音服务功能。 继续参考图 3 , 在扁平化的 GSM网络中， 当进行移动终端作为被叫的话音业 务时， 核心网也会基于位置区信息将寻呼消息通过 A接口发送给属于同一位 置区的 eBTS, eBTS再按照一定的寻呼组的处理， 将寻呼消息通过 Um接口 发送给 MS。
由此可以看出，在扁平化的 GSM网络中，对于每一个移动终端作为被叫 的话音业务来说， A接口需要发送的寻呼消息数等于属于同一位置区的所有 eBTS的数目。 一般情况下， eBTS的数目会达到上百个甚至几百个之多。
因此， 在通信网络扁平化以后， 核心网直接将寻呼消息发送给 eBTS, 由 于同一位置区内 eBTS数量较多， 远远多于传统网络中 BSC的数量， 因此通 信网络扁平化以后核心网需要发送的寻呼消息会大大地增加， 导致核心网负 荷的增加。 发明内容
本发明所要解决的技术问题， 在于需要提供一种扁平化移动通信网络的 寻呼***及方法， 用于扁平化移动通信网络的寻呼。
为了解决上述技术问题， 本发明提供了一种扁平化移动通信网络的寻呼 方法， 用于核心网向一位置区中的增强型基站发起寻呼， 该方法包括：
所述核心网将寻呼消息发送给所述位置区中的某一个增强型基站； 所述某一个增强型基站将所述寻呼消息直接转发给所述寻呼的目标小 区， 或者将所述寻呼消息转发所述位置区中其余增强型基站， 由其余增强型 基站将所述寻呼消息转发给所述目标小区。
优选地， 将所述位置区中的所有增强型基站分为两层， 第一层至少包含 所述某一个增强型基站， 第二层至少包含一个增强型基站。
优选地， 所述某一个增强型基站处于非正常工作状态时， 所述核心网将 所述寻呼消息发送给所述第一层中另一个增强型基站， 以完成所述寻呼。
优选地， 所述第一层中的每个增强型基站都存储有所述位置区内中所有 增强型基站与各自所辖小区的辖属关系； 所述某一个增强型基站根据所述辖 属关系将所述寻呼消息转发给所述目标小区， 或者根据所述辖属关系将所述 寻呼消息转发给所述位置区中其余增强型基站。
优选地， 为所述位置区中一个以上的增强型基站设置优先级顺序， 所述 核心网将所述寻呼消息发送给处于正常工作状态中的优先级顺序最高的增强 型基站。
优选地， 所述寻呼消息中带有指示所述寻呼针对整个所述位置区的指示 信息， 所述某一个增强型基站根据所述指示信息将所述寻呼消息转发给所述 位置区中其余所有的增强型基站。
为了解决上述技术问题， 本发明还提供过了一种扁平化移动通信网络的 核心网， 用于向一位置区中的增强型基站发起寻呼， 其中：
所述核心网将寻呼消息发送给所述位置区中的某一个增强型基站。
优选地， 所述核心网设置为所述某一个增强型基站处于非正常工作状态 时， 将所述寻呼消息发送给另一个增强型基站， 以完成所述寻呼。
为了解决上述技术问题， 本发明还提供了一种扁平化移动通信网络的寻 呼***， 包括核心网及增强型基站， 其中：
所述核心网设置为向一位置区中的某一个增强型基站发送寻呼消息； 所述某一个增强型基站设置为将所述寻呼消息直接转发给所述寻呼的目 标小区， 或者将所述寻呼消息转发所述位置区中其余增强型基站；
所述其余增强型基站设置为将所述寻呼消息直接转发给所述目标小区。 优选地， 所述位置区中的所有增强型基站被设置为两层， 第一层至少包 含所述某一个增强型基站， 第二层至少包含一个增强型基站。
优选地， 所述核心网设置为所述某一个增强型基站处于非正常工作状态 时， 将所述寻呼消息发送给所述第一层中另一个增强型基站， 以完成所述寻 呼。
优选地， 所述第一层中的每个增强型基站都存储有所述位置区内中所有 增强型基站与各自所辖小区的辖属关系； 所述某一个增强型基站根据所述辖 属关系将所述寻呼消息转发给所述目标小区， 或者根据所述辖属关系将所述 寻呼消息转发给所述位置区中其余增强型基站。
优选地， 所述位置区中一个以上的增强型基站被设置优先级顺序， 所述 核心网被设置为将所述寻呼消息发送给处于正常工作状态中的优先级顺序最 高且增强型基站。
优选地， 所述寻呼消息中设置有指示所述寻呼针对整个所述位置区的指 示信息， 所述某一个增强型基站设置为根据所述指示信息将所述寻呼消息转 发给所述位置区中其余所有的增强型基站。
本发明中核心网向位置区内某个 eBTS发送寻呼消息，再通过该 eBTS与 该位置区中其余所有 eBTS之间转发寻呼消息， 完成核心网对位置区内目标 小区寻呼的目的。 并且， 第一层中的 eBTS釆用主备工作机制， 提高了寻呼 的成功率。 本发明的技术方案适用于将 eBTS分为两层的网络， 大大简化了 寻呼转发模块的计算量， 提高了工作效率。 本发明提供的一种扁平化移动通 信网络中的寻呼***及方法， 相比于现有的非扁平化通信网络大量地减少核 心网 A口信令的负荷。
本发明的其它特征和优点将在随后的说明书中阐述， 并且， 部分地从说 明书中变得显而易见， 或者通过实施本发明而了解。 本发明的目的和其他优 点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。 附图概述
附图用来提供对本发明的进一步理解， 并且构成说明书的一部分， 与本 发明的第一实施例起用于解释本发明， 并不构成对本发明的限制。 在附图中： 图 1为传统 GSM网络的架构及接口示意图；
图 2为传统 GSM网络中位置区寻呼示意图；
图 3为现有扁平化 GSM网络架构、 接口及位置区寻呼示意图； 图 4为 GSM网络扁平化后同一位置区中 eBTS分层的网络示意图； 图 5为本发明第一实施例中寻呼传播规则示意图；
图 6为本发明第一实施例的信令流程图；
图 7为 GSM网络扁平化后同一位置区中 eBTS另一分层的网络示意图； 图 8为本发明第二实施例中寻呼传播规则示意图；
图 9为本发明第二实施例的信令流程图；
图 10为本发明第二实施例中另一寻呼传播规则示意图；
图 11为本发明第二实施例的另一信令流程图。 本发明的较佳实施方式
以下将结合附图及实施例来详细说明本发明的实施方式， 借此对本发明 如何应用技术手段来解决技术问题， 并达成技术效果的实现过程能充分理解 并据以实施。
需要说明的是， 如果不冲突， 本发明实施例以及实施例中的各个特征可 以相互结合， 均在本发明的保护范围之内。 另外， 在附图的流程图示出的步 骤可以在诸如一组计算机可执行指令的计算机***中执行， 并且， 虽然在流 程图中示出了逻辑顺序， 但是在某些情况下， 可以以不同于此处的顺序执行 所示出或描述的步骤。
本发明的核心思想是， 扁平化移动通信网络中的核心网对某个位置区发 起寻呼时， 仅把寻呼消息发送给该位置区中的某个 eBTS , 然后收到寻呼消息 的 eBTS将该寻呼消息转发给该位置区内没有直接从核心网收到该寻呼消息 的所有 eBTS。 经过 eBTS与 eBTS之间的转发， 使位置区内所有的 eBTS都 能收到核心网下发的该寻呼消息， 最后由每个 eBTS将该寻呼消息转发给各 eBTS 自身所辖的各小区， 此时各小区均为目标小区。 通过 eBTS与 eBTS之 间的转发， 也可以使得单个目标小区所属的 eBTS 收到该寻呼消息并完成目 标小区的寻呼。
在上述技术方案中， 核心网将寻呼消息发送给某个 eBTS 比如称之为 eBTSl , 再由该 eBTSl将寻呼消息转发给其余 eBTS。作为直接接收核心网下 发的寻呼消息的 eBTS (此处为 eBTSl ) , 可以根据具体情况进行调整， 比如 该 eBTSl发生故障时， 核心网可以将寻呼消息发送给另外一个 eBTS比如称 之为 eBTS2, 再由该 eBTS2将寻呼消息转发给位置区内没有直接从核心网收 到该寻呼消息的所有 eBTS。
本发明实施例可实现该寻呼方式的移动通信***（例如扁平化的 GSM 等）中的网元主要包括核心网及 eBTS。 各网元实体的连接关系 （包括消息交 互关系 )将在后续对本发明方法进行说明时详细描述。
以下结合附图对本发明的优选实施例进行说明， 应当理解， 此处所描述 的优选实施例仅用于说明和解释本发明， 并不用于限定本发明。
第一实施例
根据本发明实施例， 首先提供了一种对位置区寻呼的寻呼传播规则， 该 寻呼传播规则也即当核心网需要进行对某一位置区进行寻呼时， 核心网对该 位置区中的某个 eBTS发送寻呼消息； 该 eBTS在收到该寻呼消息以后， 将该 寻呼消息转发给位置区内其余 eBTS。
具体地说， 可以将网络（以 GSM网络为例 ) 中同一位置区的所有 eBTS 分为两层，第一层和第二层，其中第一层只有一个 eBTS,除该第一层的 eBTS 之外， 该位置区内其余 eBTS均为第二层。 如图 4举例说明所示， 该位置区 一共有 19个 eBTS, 其中一层 eBTS为 1个即 eBTSl l、 二层 eBTS为 18个即 eBTS201、 eBTS202 eBTS218。
当核心网对该位置区下的某个用户进行寻呼时 ,通过 A口将寻呼（ Paging ) 消息发送给一层的 eBTS。 如图 5说明所示， 核心网将寻呼消息发送给一层 eBTSl l。 优选的， 该寻呼消息中可以带有指示信息以指示该寻呼是针对整个 位置区的寻呼。
eBTS 11在收到寻呼消息后，除了按照现有技术要求在 Um口发送寻呼请 求（ Paging Request ) 消息以对自身所辖小区进行寻呼外， 还需要按照定义的 寻呼传播规则， 通过 eBTS 与 eBTS 之间的增强型基站间接口将该寻呼 ( Paging )消息转发给二层 eBTS,即 eBTSl 1需要将寻呼消息转发给 eBTS201、 eBTS202 eBTS217和 eBTS218, 该些二层 eBTS分别在 Um口发送寻呼 请求（Paging Request ) 消息以对自身所辖小区进行寻呼。 其中的增强型基站 间接口，可以用于增强型基站与增强型基站之间进行交互。当然，如果 eBTSl l 判断出寻呼的目标终端位于自身所辖的小区中， 则也可以只在 Um口发送寻 呼请求（ Paging Request ) 消息； 如果 eBTSl l判断出寻呼的目标终端不在自 身所辖的小区中，则也可以只转发寻呼消息给二层 eBTS而不在 Um口发送寻 呼请求 ( Paging Request ) 消息。
每个增强型基站都包含有增强型基站间接口功能模块， 该功能模块用于 实现增强型基站之间的信令交互； 其中， 该信令包括增强型基站的资源占有 率， 增强型基站下各小区的信息， 如小区标识号、 频率和当前使用的语音编 解码类型等， 以及增强基站间转发的寻呼信令。 这样， 每个增强型基站即可 以及时掌握相邻增强型基站的资源占有状况和小区相关信息， 方便切换时寻 找合适的目标增强基站等使用。 上述通过增强型基站间接口转发该寻呼 ( Paging ) 消息， 即是通过每个增强型基站上的增强型基站间接口功能模块 实现的。 增强型基站上的增强型基站间接口功能模块实现转发寻呼信令可以 通过多种方式来实现， 如下列举两种方式：
方式一： 增强型基站通过 A接口收到核心网发来的寻呼信令后， 基于设 定的寻呼转发规则， 直接将寻呼信令转发给其他增强型基站。 在转发过程中， 釆用无应答的方式进行转发， 即转发增强型基站将寻呼命令转给其他增强型 基站时， 不要求其他增强型基站在收到寻呼命令后给予回应信息以表明已经 收到寻呼消息。
方式二： 增强型基站通过 A接口收到核心网发来的寻呼信令后， 基于设 定的寻呼转发规则， 直接将寻呼信令转发给其他增强型基站。 在转发过程中， 釆用有应答的方式进行转发， 即转发增强型基站将寻呼命令转给其他增强型 基站时， 要求其他增强型基站在收到寻呼命令后给予回应消息以表明已经收 到寻呼消息。 在转发寻呼信令时， 转发增强型基站启动定时器， 如果在定时 器超时时 ,依然没有收到其他增强型基站在收到寻呼命令后给予的回应消息 , 则认为该寻呼信令发送失败， 转发增强型基站将再次发送一遍寻呼信令， 直 到超过最大尝试次数或者收到回应消息。
二层 eBTS在收到寻呼消息后， 需要按照现有技术要求在 Um口发送寻 呼请求（ Paging Request ) 消息。 在二层 eBTS收到该寻呼消息后， 该位置区 内所有的 eBTS都已经收到了寻呼消息。
下面将结合附图和实施例对本发明的方法以及上述各网元之间的消息交 互关系进行详细描述。
图 6是本发明实施例扁平化后的移动网络***中的对某个位置区的寻呼 传播规则信令流程图， 该流程主要包括如下步骤：
步骤 S610,核心网通过 A接口向一层 eBTS即 eBTS 11发送寻呼（Paging ) 消息， 通知一层 eBTS进行位置区的寻呼；
步骤 S620, —层 eBTS按照定义的寻呼传播规则， 通过 eBTS与 eBTS之 间的增强型基站间接口向二层 eBTS转发该寻呼消息，通知二层 eBTS进行位 置区的寻呼。
第二实施例
通过上述第一实施例中的描述可以看出， 第一实施例中是通过将寻呼消 息发送给某个固定的 eBTS, 再由其将寻呼消息转发给其余 eBTS。 但是当该 eBTS发生故障等无法转发该寻呼消息时， 将会对整个位置区的寻呼产生影 响。 第二实施例在第一实施例的基础上， 提供了一种优化的寻呼传播规则， 通过设定一层主用 eBTS和一层备用 eBTS的方式， 实现位置区的寻呼。
具体地说， 在网络中将位置区的所有 eBTS分为两层， 即第一层和第二 层。如图 7举例说明所示， 该位置区一共有 19个 eBTS, —层 eBTS为 2个和 二层 eBTS为 17个，其中一层 eBTS分别为一层主用 eBTS即 eBTSl l和一层 备用 eBTS即 eBTS12, 二层 eBTS分别为 eBTS201、 eBTS202 eBTS216 和 BTS217。
确定 eBTS是否处于正常的工作状态， 现有技术中有较多的实现方式， 比 ^口：
方式一：主用 eBTS和备用 eBTS间在增强型基站间接口上进行持续的心 跳检测， 如果备用 eBTS检查不到主用 eBTS的心跳， 那么就认为主用 eBTS 不在正常工作状态。 该备用 eBTS会主动给核心网发送一个消息以告知核心 网此时主用 eBTS工作状态不正常， 应该把寻呼消息发给自己。
方式二：核心网分别与主用 eBTS和备用 eBTS间在 A接口上进行持续的 心跳检测， 如果核心网检查不到主用 eBTS的心跳， 那么就认为主用 eBTS不 在正常工作状态， 不能把寻呼消息发送给主用 eBTS, 并根据对备用 eBTS的 心跳检测结果， 检验是否可以把寻呼消息发给备用 eBTS。
本实施例在一层主用 eBTS即 eBTSl l处于正常工作状态时，在需要对该 位置区下的某个用户进行寻呼时， 核心网通过 A口将寻呼（Paging ) 消息发 送给一层的主用 eBTS。 如图 8说明所示， 核心网将寻呼消息发送给一层主用 eBTS。 优选的， 该寻呼消息中可以带有指示信息以指示该寻呼是针对整个位 置区的寻呼。
一层主用 eBTS在收到该寻呼消息后， 除了按照现有技术要求在 Um口 发送寻呼请求（ Paging Request ) 消息以对自身所辖的小区进行寻呼外外， 还 需要按照定义的寻呼传播规则，通过 eBTS与 eBTS之间的增强型基站间接口 将该寻呼（ Paging )消息转发给二层 eBTS和一层备用 eBTS,以使该二层 eBTS 和一层备用 eBTS分别完成自身所辖小区的寻呼， 也即：
一层主用 eBTS即 eBTSl l需要将该寻呼消息转发给二层 eBTS201、二层 eBTS202 二层 eBTS17及一层备用 eBTS即 eBTS12。 二层 eBTS和一层备用 eBTS在收到寻呼消息后， 需要按照技术要求在 Um口发送寻呼请求（ Paging Request ) 消息。 在二层 eBTS和一层备用 eBTS 收到寻呼消息后， 该位置区内所有的 eBTS都已经收到了寻呼消息。
下面将结合附图和实施例对本发明的方法以及上述各网元之间的消息交 互关系进行详细描述。
图 9是本发明实施例扁平化后的移动网络***中的对某个位置区的寻呼 传播规则信令流程图， 该流程主要包括如下步骤：
步骤 S910, 核心网通过 A接口向一层主用 eBTS发送寻呼（Paging ) 消 息， 通知一层 eBTS进行位置区的寻呼；
步骤 S920,—层主用 eBTS按照定义的寻呼传播规则，通过 eBTS与 eBTS 之间的增强型基站间接口向二层 eBTS和一层备用 eBTS发送该寻呼消息，通 知二层 eBTS和一层备用 eBTS进行位置区的寻呼。
本实施例在一层主用 eBTS即 eBTSl l处于非正常工作状态时，在需要对 该位置区下的某个用户进行寻呼时， 核心网通过 A口将寻呼（Paging ) 消息 发送给一层的备用 eBTS。 如图 10说明所示， 核心网将寻呼消息发送给一层 备用 eBTS。优选的， 该寻呼消息中可以带有指示信息以指示该寻呼是针对整 个位置区的寻呼。
一层备用 eBTS在收到寻呼消息后， 除了按照现有技术要求在 Um口发 送寻呼请求（Paging Request ) 消息外， 还需要按照定义的寻呼传播规则， 通 过 eBTS与 eBTS之间的增强型基站间接口将该寻呼（Paging ) 消息转发给二 层 eBTS 和一层主用 eBTS, 即一层备用 eBTS 需要将寻呼消息转发给二层 eBTSl、 二层 eBTS2 二层 eBTS17和一层主用 eBTS。
二层 eBTS和一层主用 eBTS在收到寻呼消息后， 需要按照技术要求在 Um口发送寻呼请求（ Paging Request ) 消息。 在二层 eBTS和一层主用 eBTS 都收到寻呼消息后， 该位置区内所有的 eBTS都已经收到了寻呼消息。
下面将结合附图和实施例对本发明的方法以及上述各网元之间的消息交 互关系进行详细描述。
图 11 是本发明实施例扁平化后的移动网络***中的对某个位置区的寻 呼传播规则信令流程图， 该流程主要包括如下步骤：
步骤 S11A, 核心网通过 A接口给一层 eBTS发送寻呼（Paging ) 消息， 通知一层备用 eBTS进行位置区的寻呼；
步骤 S11B,—层备用 eBTS按照定义的寻呼传播规则，通过 eBTS与 eBTS 之间的增强型基站间接口给其附属的二层 eBTS和一层主用 eBTS发送寻呼消 息， 通知二层 eBTS和一层主用 eBTS进行位置区的寻呼。
需要说明的是， 在不背离所附权利要求阐明的精神和范围的情况下， 可 以对元件或模块的功能和布置进行各种改变。 例如， 作为一种实现方式， 可 以将上述第二实施例中设置一个以上的一层备用 eBTS, 如 eBTS13、 eBTS14 以及 eBTS15。 当主用 eBTS即 eBTSl l处于非正常工作状态时， 核心网将寻 呼消息发送给 eBTS12, 由 eBTS12转发给其余 eBTS, 包括所有二层 eBTS和 其余的一层备用 eBTS, 该其余的一层备用 eBTS也即 eBTS13、 eBTS14以及 eBTS15; 当 eBTSl l与 eBTS12都处于非正常工作状态时， 核心网将寻呼消 息发送给 eBTS 13 ,由 eBTS 13转发给其余 eBTS;当 eBTSl l、eBTS12和 eBTS13 都处于非正常工作状态时， 核心网将寻呼消息发送给 eBTS14, 由 eBTS14将 该寻呼消息转发给其余 eBTS。 由此可见， 在设置多个备用 eBTS时， 更有利 于保证所有 eBTS都能收到核心网下发的寻呼消息， 减少核心网 A口信令的 负荷。
在一层设置一个或一个以上的备用 eBTS时，可以为所有的 eBTS预先设 置优先级顺序。 核心网在下发寻呼消息时， 将该寻呼消息下发给处于正常状 态中的优先级最高的那一个 eBTS, 也即首先该 eBTS为一层中处于正常工作 状态的所有 eBTS 中优先级顺序最高。 因此， 前述第二实施例也即预先设置 一层主用 eBTS和一层备用 eBTS的优先级顺序， 且该一层主用 eBTS的优先 级高于该一层备用 eBTS。在前述的一个主用 eBTS以及一个以上的备用 eBTS 时，同样可以为主用 eBTS以及该一个以上的备用 eBTS预先设置优先级顺序， 核心网在下发寻呼消息时， 将该寻呼消息下发给处于正常状态中的优先级最 高的一个 eBTS。为一层中的所有 eBTS预先设置优先级顺序（一层中的 eBTS 数量为一个以上） ， 其实质为同一位置区中的一个以上的增强型基站设置优 先级顺序。 前述第一实施例和第二实施例， 均是核心网针对整个位置区的寻呼， 本 发明技术方案并不限于此。 对于针对个别小区的寻呼本发明技术方案同样可 以实现。 对于位置区的寻呼， 是核心网针对管辖范围内的所有小区的寻呼， 此时所有小区都是寻呼的目标小区； 针对个别小区的寻呼， 是核心网通过该 个别小区所属的 eBTS 实现针对该个别小区的寻呼， 此时该个别小区是寻呼 的目标小区。 需要注意的是， 本发明中的目标小区如未特别说明， 均表示核 心网欲要寻呼的目标终端所在的小区。
具体地说，将同一位置区的 eBTS分为 2层，每一层都至少有一个 eBTS, 且第一层中的每个 eBTS都存储有该位置区内所有 eBTS与各自所辖小区的辖 属关系， 包括自身存储的自身与自身所辖小区的辖属关系。 由于第一层中的 eBTS都存储有所有 eBTS与各自所辖小区的辖属关系， 因此第一层中的任意 一个 eBTS在收到核心网下发的寻呼消息后， 都能准确找到管辖目标小区的 eBTS。 第二层中的 eBTS , 可以存储自身与自身所辖小区的辖属关系， 也可 以不存储自身与自身所辖小区的辖属关系。 当然， 在实际应用中， 包括一层 eBTS和二层 eBTS, 都会优选存储自身与自身所辖小区的辖属关系。
第一层有一个以上的 eBTS时， 第一层中的各 eBTS设置有优先级顺序。 核心网在下发寻呼消息时， 将寻呼消息发送给第一层中处于正常工作状态中 的优先级最高的那一个 eBTS。
当该第一层中处于正常工作状态中的优先级最高的 eBTS 管辖目标小区 时， 其根据自身存储的辖属关系， 发现目标小区属于自身管辖， 则在 Um口 发送寻呼请求（ Paging Request ) 消息以将完成核心网对目标小区的寻呼。 当 该目标小区属于其它 eBTS 时， 该第一层中处于正常工作状态中的优先级最 高的 eBTS根据自身存储的 eBTS与小区的辖属关系，判断出目标小区属于其 它 eBTS 管辖， 则通过增强型基站间接口将该寻呼消息转发给目标小区所属 的 eBTS (可能是一层的其它 eBTS, 也可能是二层的 eBTS ) , 然后由该目标 小区所属的 eBTS在 Um口发送寻呼请求（Paging Request ) 消息以将完成核 心网对目标小区的寻呼。
显然， 本领域的技术人员应该明白， 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现， 它们可以集中在单个的计算装置上， 或者分布 在多个计算装置所组成的网络上， 可选地， 它们可以用计算装置可执行的程 序代码来实现， 从而， 可以将它们存储在存储装置中由计算装置来执行， 或 者将它们分别制作成各个集成电路模块， 或者将它们中的多个模块或步骤制 作成单个集成电路模块来实现。 这样， 本发明不限制于任何特定的硬件和软 件结合。
虽然本发明所揭露的实施方式如上， 但所述的内容只是为了便于理解本 发明而釆用的实施方式， 并非用以限定本发明。 任何本发明所属技术领域内 的技术人员， 在不脱离本发明所揭露的精神和范围的前提下， 可以在实施的 形式上及细节上作任何的修改与变化， 但本发明的专利保护范围， 仍须以所 附的权利要求书所界定的范围为准。
工业实用性
借助于本发明实施例提供的上述技术方案， 在进行位置区寻呼时核心网 向位置区内某个 eBTS发送寻呼消息，再通过该 eBTS与该位置区中其余所有 eBTS之间转发寻呼消息，达到位置区内的某个或某些目标小区都能收到寻呼 消息的目的。 本发明提供了一种扁平化移动通信网络中的寻呼***及方法， 相比于现有的非扁平化通信网络大量地减少核心网 A口信令的负荷。

Claims

权 利 要 求 书
1、 一种扁平化移动通信网络的寻呼方法，用于核心网向一位置区中的增 强型基站发起寻呼， 该方法包括：
所述核心网将寻呼消息发送给所述位置区中的某一个增强型基站； 所述某一个增强型基站将所述寻呼消息直接转发给所述寻呼的目标小 区， 或者将所述寻呼消息转发所述位置区中其余增强型基站， 由其余增强型 基站将所述寻呼消息转发给所述目标小区。
2、 如权利要求 1所述的方法， 其中：
将所述位置区中的所有增强型基站分为两层， 第一层至少包含所述某一 个增强型基站， 第二层至少包含一个增强型基站。
3、 如权利要求 2所述的方法， 其中：
所述某一个增强型基站处于非正常工作状态时， 所述核心网将所述寻呼 消息发送给所述第一层中另一个增强型基站， 以完成所述寻呼。
4、 如权利要求 2所述的方法， 其中：
所述第一层中的每个增强型基站都存储有所述位置区内中所有增强型基 站与各自所辖小区的辖属关系； 所述某一个增强型基站根据所述辖属关系将 所述寻呼消息转发给所述目标小区， 或者根据所述辖属关系将所述寻呼消息 转发给所述位置区中其余增强型基站。
5、 如权利要求 1所述的方法， 其中：
为所述位置区中一个以上的增强型基站设置优先级顺序， 所述核心网将 所述寻呼消息发送给处于正常工作状态中的优先级顺序最高的增强型基站。
6、 如权利要求 1至 5中任一项所述的方法， 其中：
所述寻呼消息中带有指示所述寻呼针对整个所述位置区的指示信息， 所 述某一个增强型基站根据所述指示信息将所述寻呼消息转发给所述位置区中 其余所有的增强型基站。
7、 一种扁平化移动通信网络的核心网，用于向一位置区中的增强型基站 发起寻呼， 其中：
所述核心网将寻呼消息发送给所述位置区中的某一个增强型基站。
8、 如权利要求 7所述的核心网， 其中：
所述核心网设置为所述某一个增强型基站处于非正常工作状态时， 将所 述寻呼消息发送给另一个增强型基站， 以完成所述寻呼。
9、 一种扁平化移动通信网络的寻呼***， 包括核心网及增强型基站，其 中：
所述核心网设置为向一位置区中的某一个增强型基站发送寻呼消息； 所述某一个增强型基站设置为将所述寻呼消息直接转发给所述寻呼的目 标小区， 或者将所述寻呼消息转发所述位置区中其余增强型基站；
所述其余增强型基站设置为将所述寻呼消息直接转发给所述目标小区。
10、 如权利要求 9所述的***， 其中：
所述位置区中的所有增强型基站被设置为两层， 第一层至少包含所述某 一个增强型基站， 第二层至少包含一个增强型基站。
11、 如权利要求 10所述的***， 其中：
所述核心网设置为所述某一个增强型基站处于非正常工作状态时， 将所 述寻呼消息发送给所述第一层中另一个增强型基站， 以完成所述寻呼。
12、 如权利要求 10所述的***， 其中：
所述第一层中的每个增强型基站都存储有所述位置区内中所有增强型基 站与各自所辖小区的辖属关系； 所述某一个增强型基站根据所述辖属关系将 所述寻呼消息转发给所述目标小区， 或者根据所述辖属关系将所述寻呼消息 转发给所述位置区中其余增强型基站。
13、 如权利要求 9所述的***， 其中：
所述位置区中一个以上的增强型基站被设置优先级顺序， 所述核心网被 设置为将所述寻呼消息发送给处于正常工作状态中的优先级顺序最高且增强 型基站。
14、 如权利要求 9至 13中任一项所述的***， 其中：
所述寻呼消息中设置有指示所述寻呼针对整个所述位置区的指示信息， 所述某一个增强型基站设置为根据所述指示信息将所述寻呼消息转发给所述 位置区中其余所有的增强型基站。
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