WO2012089008A1 - 小区切换方法、装置与系统 - Google Patents

小区切换方法、装置与系统 Download PDF

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Publication number
WO2012089008A1
WO2012089008A1 PCT/CN2011/083812 CN2011083812W WO2012089008A1 WO 2012089008 A1 WO2012089008 A1 WO 2012089008A1 CN 2011083812 W CN2011083812 W CN 2011083812W WO 2012089008 A1 WO2012089008 A1 WO 2012089008A1
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WO
WIPO (PCT)
Prior art keywords
base station
information
pico base
handover
terminal
Prior art date
Application number
PCT/CN2011/083812
Other languages
English (en)
French (fr)
Inventor
熊立群
嵇家刚
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP11852991.6A priority Critical patent/EP2645771B1/en
Publication of WO2012089008A1 publication Critical patent/WO2012089008A1/zh
Priority to US13/926,457 priority patent/US20130288688A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00838—Resource reservation for handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0064—Transmission or use of information for re-establishing the radio link of control information between different access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/04—Reselecting a cell layer in multi-layered cells
    • 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
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Definitions

  • the present invention claims the priority of the Chinese patent application filed on December 29, 2010, the Chinese Patent Application No. 201010612074.2, the invention entitled “Cell Switching Method, Apparatus and System", the entire contents of which are incorporated herein by reference. This is incorporated herein by reference.
  • the present invention relates to the field of mobile communication technologies, and in particular, to a cell handover method, apparatus, and system.
  • BACKGROUND In a wireless communication system, not only a macro cell (Macro cell) that solves wide coverage, but also a micro cell that covers a hotspot area covered by traffic/throughput, and a smaller coverage area are provided.
  • Base station Femto cell
  • Pico base stations are mainly used in homes, shopping malls, office buildings, etc., and they are rapidly developing as a new type of base station.
  • the pico base station automatically detects the macro base station signal, and adds the macro base station neighboring area to the pico base station side to meet the handover requirement.
  • no handover relationship is configured from the macro base station sector to the pico base station area. Therefore, a call drop occurs when the terminal enters the pico base station area from the macro base station area.
  • the drawback of this technical solution is that: the number of pico base stations is large, and there may be dozens of hundreds of pico base stations under the same macro sector, and the number of neighbor cells of the macro base station is limited; and, pseudo The random number of random sequences (PN, Pseudo random Noise) is limited. Since there cannot be the same PN in the neighboring cell of the same base station, the number of PNs that can be configured around a base station is actually small. Therefore, the method of manually configuring the neighboring cell of the base station will result in the problem of insufficient number of neighbors and PN. In addition, the general user buys the pico base station and installs it by itself, and cannot uniformly plan the application of the pico base station.
  • PN pseudo The random number of random sequences
  • the embodiments of the present invention provide a cell handover method, apparatus, and system, which aim to implement handover of a terminal from a macro base station to a pico base station, and solve the problem of insufficient number of neighbors and PN number.
  • an embodiment of the present invention provides a cell handover method, where the method includes: receiving, by a network side device, a cell handover request sent by a source base station, where the handover request includes source base station information and terminal information that needs to be switched;
  • the network side device queries a triplet composed of the source base station information, the terminal information, and the target pico base station information, and obtains target pico base station information corresponding to the terminal information that needs to be switched; the triplet
  • the network side device obtains the source base station information and the dropped call terminal information acquired by the network, and the dropped terminal according to the target pico base station.
  • the network side device notifying the target pico base station to perform handover resource preparation, and sending a handover instruction to the terminal that needs to be handed over, so that the terminal switches to a corresponding target pico Base station.
  • the embodiment of the present invention further provides a network side device, where the network side device includes: a receiving device, configured to receive a cell handover request sent by a source base station, where the handover request includes source base station information and terminal information that needs to be switched; And a querying device, configured to query a triplet formed by the source node information, the terminal information, and the target pico base station information, to obtain target pico base station information corresponding to the terminal information that needs to be switched; the triplet
  • the network side device obtains the source base station information and the dropped call terminal information acquired by the network, and the dropped terminal according to the target pico base station.
  • the sending device is configured to: notify the target pico base station to perform handover resource preparation, and send a handover instruction to the terminal that needs to be handed over, where The terminal is switched to a corresponding target pico base station.
  • the embodiment of the present invention further provides a cell handover method, where the method includes: if a terminal disconnects from a source base station to a target pico base station, and registers with the target pico base station, or the terminal switches from the source base station to the target pico
  • the base station generates a call, and reestablishes the service within the range of the target pico base station; the target pico base station sends the dropped call terminal information and the target pico base station information to the network side device, so that the network side device configuration includes the source a triplet of base station information, terminal information, and target pico base station information; if the terminal sends a cell handover request to the network side device, the cell handover request includes source base station information and terminal information that needs to be handed over, and the target pico base station receives the a handover preparation message sent by the network side device, where the handover preparation message is sent by the network side device according to the terminal information that needs to be switched, and the triplet; the target pico base station prepare
  • the embodiment of the present invention further provides a pico base station, where the pico base station includes: an information sending apparatus, if the terminal switches from the source base station to the pico base station, and the call is made to the pico base station, or the terminal is from the source base station.
  • the switching device if the terminal sends a cell handover request to the network side device, where the cell handover request includes the source base station information and the terminal information that needs to be handed over, the receiving the a handover preparation message sent by the network side device, where the handover preparation message is sent by the network side device according to the terminal information that needs to be switched according to the need to switch, and prepares resources required for handover according to the handover preparation message, so that The terminal switches from the source base station to the pico base station.
  • the embodiment of the present invention further provides a cell handover system, where the system includes the network side device and the pico base station described in the foregoing embodiments.
  • An advantageous effect of the embodiment of the present invention is that the source base station information is saved by the network side device.
  • the recording of the information, the terminal information and the pico base station information, according to which the handover of the terminal from the source base station to the pico base station is implemented.
  • the cell number, the sector number, the carrier frequency number, and the PN, which are necessary for the configuration of the neighboring cell are avoided, and the PN and other resources are saved.
  • the application scenario is very extensive, and the network planning is simpler.
  • FIG. 1 is a diagram showing an example of a networking structure of a cell switching system according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a cell handover method on a network side according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a cell handover method on a pico base station side in an embodiment of the present invention
  • FIG. 4 is a schematic diagram of an application scenario of a cell handover in an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a complete signaling interaction process of a cell handover method according to an embodiment of the present invention
  • FIG. 6 is a second schematic diagram of an application scenario of a cell handover according to an embodiment of the present invention.
  • FIG. 7 is a third schematic diagram of an application scenario of cell handover in an embodiment of the present invention.
  • FIG. 8 is a functional block diagram of a network side device in an embodiment of the present invention.
  • FIG. 9 is a functional block diagram of a pico base station in an embodiment of the present invention.
  • the embodiment of the present invention provides a cell handover method, which is applied to a process in which a terminal is switched from a source base station to a pico base station.
  • the source base station in the embodiment of the present invention may be a macro base station or a pico base station, and in the following embodiments, the source base station is The macro base station is described as an example.
  • the cell handover method is applicable to Intervening between code division multiple access (CDMA 1X) and enhanced code division multiple access (CDMA EVDO) systems between the second and third generations; in addition, it can also be applied to wideband code division multiple access (WCDMA, Wideband Code Division Multiple Access), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), Global System Mobile Communications (GSM), Long Term Evolution (LTE, Long Term Evolution), Worldwide Interoperability for Microwave Access (WiMAX), and other wireless communication systems that require neighboring areas.
  • WCDMA Wideband Code Division Multiple Access
  • TD-SCDMA Time Division Synchronous Code Division Multiple Access
  • GSM Global System Mobile Communications
  • LTE Long Term Evolution
  • WiMAX Worldwide Interoperability for Microwave Access
  • it is not limited to this, and a specific implementation scenario may be determined according to actual conditions.
  • the device involved in the embodiment includes: a terminal, a source base station, and a pico base station; and further includes a network side device for cell handover on the network side, where the network side device can be any one of the following: MSCe, Mobile Switching Center Emulation), Media Gateway (MGW, Media GateWay), Base Station Controller (BSC), Femto GateWay, Network Management System (NMS), Grouping The data service node (PDSN, Packet Data Serving Node), the home location register (HLR), and the newly added server, but are not limited thereto, and the specific network side device can be determined according to actual conditions.
  • MSCe Mobile Switching Center Emulation
  • MGW Media Gateway
  • BSC Base Station Controller
  • NMS Network Management System
  • PDSN Packet Data Serving Node
  • HLR home location register
  • the specific network side device can be determined according to actual conditions.
  • FIG. 1 is a schematic diagram of an example of a networking structure of a cell switching system according to an embodiment of the present invention.
  • the network structure includes: a pico base station 101, a macro base station 102, and a terminal 103.
  • a security gateway (SeGW) 104 an NMS 105, an FGW 106, an MSCe 107, and an MGW 108 are also included.
  • BSC 109 and PDSN 110 are also included.
  • the above network structure is only illustrative, but it is not limited to this. The specific networking structure can be determined according to the actual situation.
  • the cell handover method according to the embodiment of the present invention is described below from the network side and the pico base station side.
  • FIG. 2 is a flowchart of the cell handover method on the network side according to an embodiment of the present invention. As shown in FIG. 2, the method includes: Step 201: The network side device receives a cell handover request sent by the source base station, where the handover request includes source base station information and terminal information that needs to be switched.
  • Step 202 The network side device queries a triplet formed by the source node information, the terminal information, and the target pico base station information, and obtains target pico base station information corresponding to the terminal information that needs to be switched.
  • the triplet is the source base station information and the dropped terminal information acquired by the network side device according to the self, and the location sent by the target pico base station when the terminal switches from the source base station to the target pico base station. Generating the dropped terminal information and the target pico base station information;
  • Step 203 The network side device notifies the target pico base station to perform handover resource preparation, and sends a handover instruction to the terminal that needs to be handed over, so that the terminal switches to the corresponding target pico base station.
  • the network side device in this embodiment is the MSCe 107, and the source base station is the macro base station 102.
  • the network side device may also be another device capable of implementing equivalent functions, and the source base station. It can also be a pico base station.
  • the macro base station information may include one of a cell number, a sector number, a carrier frequency number, a PN, a subnet number, or a combination thereof; the terminal information may include an International Mobile Subscriber Identity (IMSI, International Mobile Subscriber Identification) ESN (Emergency Service Number), Mobile Device Identification (MEID), User Access Identification Identifier (UATI), one or a combination of telephone numbers; pico base station information may include One of a pico base station identity, a cell number, a sector number, a PN, a frequency point number, or a combination thereof.
  • IMSI International Mobile Subscriber Identity
  • ESN Emergency Service Number
  • MEID Mobile Device Identification
  • UATI User Access Identification Identifier
  • the terminal implements the call service through the macro base station before switching from the macro base station to the pico base station device. Therefore, after receiving the pico base station information and the terminal information sent by the pico base station, the network side device searches for the call log according to the pico base station information and the terminal information, so that the macro base station information can be obtained in advance.
  • the S203 specifically includes: notifying the multiple target pico base stations to perform handover resource preparation, and sending a handover instruction to the terminal that needs to be handed over, where the handover instruction includes the multiple target pico base station information.
  • the method further includes: receiving, by the network side device, a handover result sent by the target pico base station; and updating the triplet according to the handover result.
  • the triplet on which the handover is based is deleted; or when the number of handovers is increased to a preset first upper limit value, and the number of successes is from the preset number
  • the upper limit value is reduced to zero, the triplet on which the switchover is based is deleted.
  • An optional update method is: set the maximum number of failures, and if the result of the handover is failure, increase the number of failures; when the number of failures of the handover result reaches the maximum, delete the triples. For example, you can set the maximum number of failures to 20 and the initial number of failures to be 0; each failure to add one to the number of failures. When the number of failures reaches 20, the triple is considered to be updated, and the triple is deleted.
  • Another optional update method is: set the maximum number of successes and failures; if the result of the handover is successful, increase the number of successes; if the result of the handover is failed, increase the number of failures; and, the number of successes
  • the number of failures is reduced once when the number of failures reaches the maximum. When the number of failures reaches the maximum value, the number of failures is reduced.
  • the number of successes is zero, the triples are deleted. For example, you can set a maximum of 255 successes and a maximum of 20 failures. When the cumulative number of successes reaches 255, it does not increase any more. The number of failures is reduced by 1 for each success. Conversely, after the maximum number of failures reaches 20, it does not increase any more. The number of successes is reduced by 1 for each failure. And, when the number of failures reaches 20, and the number of successes is reduced to 0, the triple is considered to be updated, and the triple is deleted.
  • the triplet record including the base station information, the terminal information, and the pico base station information can be saved on the network side, and the handover of the terminal from the source base station to the pico base station can be implemented according to the record. Further, by counting and updating the triples, you can further improve the switching success rate.
  • Pico base station side
  • FIG. 3 is a flowchart of the cell handover method on the pico base station side in the embodiment of the present invention. As shown in FIG. 3, the method includes:
  • Step 301 If a terminal disconnects from a source base station to a target pico base station, and registers with the target pico base station, or the terminal switches from the source base station to the target pico base station, a call is dropped, and the target pico base station ranges.
  • the target pico base station transmits the dropped call terminal information and the target pico base station information to the network side device; and the network side device constructs the ternary including the source base station information, the terminal information, and the target pico base station information.
  • Step 302 If the terminal sends a cell handover request to the network side device, the cell handover request includes the source base station information and the terminal information that needs to be switched, and the target pico base station receives the handover preparation message sent by the network side device.
  • the handover preparation message is sent by the network side device according to the terminal information that needs to be switched and the triplet;
  • Step 303 The target pico base station prepares resources required for handover according to the handover preparation message, so that the terminal switches from the source base station to the target pico base station.
  • the method of the present implementation further includes: sending, by the target pico base station, a handover result message to the network side device, so that the network side device updates the triplet stored by itself according to the handover result message.
  • the network side may be configured to generate and save a record including base station information, terminal information, and pico base station information; and, the pico base station receives the notification of the preparation handover according to the record, and implements handover of the terminal from the macro base station to the pico base station.
  • FIG. 4 is a schematic diagram of an application scenario of cell handover according to an embodiment of the present invention.
  • the coverage area of the macro base station is A
  • the coverage area of the pico base station is B.
  • the terminal enters the area B from the area A the cell performs cell handover.
  • FIG. 5 is a schematic diagram of a complete signaling interaction process of a cell handover method according to an embodiment of the present invention. As shown in FIG. 5, the method includes:
  • Step 501 The macro base station initiates a handover request to the network side device, where the network side device saves a triplet including macro base station information, terminal information, and pico base station information.
  • the terminal that has been recorded by the triplet in the network side device enters the coverage area of the pico base station again from the coverage area of the macro base station, the signal under the coverage area A of the macro base station deteriorates, and is not detected.
  • the macro base station may initiate a handover from the macro base station to the pico base station to the network side device.
  • Step 502 The network side device notifies the corresponding pico base station device to prepare for handover according to the triplet.
  • the network side device may query the triplet according to the information of the terminal or the information of the terminal and the macro base station, and determine the corresponding pico base station.
  • Step 503 The network side device sends a handover instruction to the terminal according to the triplet.
  • the MSCe may notify the target pico base station to prepare the receiving terminal, prepare the corresponding resource, and then notify the terminal to initiate the handover, and the terminal side sees the standard hard handover.
  • Step 504 The terminal switches to the pico base station.
  • Step 505 The pico base station sends a successful or failed handover result to the network side device.
  • Step 506 The network side device receives the handover result sent by the pico base station, performs statistics on the number of successful handover results and/or the number of failures, and updates the triplet according to the statistical result.
  • the process of generating a triplet by the network side device in this embodiment includes the following steps: Step 1: The terminal switches from the macro base station to the target pico base station, and the call is made to the target pico base station. Or the terminal switches from the source base station to the target pico base station, and the service is reestablished within the range of the target pico base station.
  • the terminal when the terminal first enters the pico base station area B from the macro base station area A, it will drop the call because the switching relationship is not configured. If the terminal is registered in the pico base station area B within a certain time range t after the call is dropped, it is considered that the handover of the macro base station A to the pico base station B occurs, which may be simply referred to as macro to F call drop. In addition, it can also be used in the pico base station area B. The newly established business is used as the decision condition for the handover.
  • Step 2 The target pico base station sends its own information and the dropped terminal information to the network side device.
  • the pico base station device can transmit the pico base station information and the terminal information to the MSCe.
  • Step 3 The network side device generates and saves the triplet.
  • the MSCe may obtain the macro base station information in advance. Therefore, the MSCe may record a triplet for the current dropped call, which is used as a reference for future handover, and the triplet includes macro base station information and terminal information. And pico base station information.
  • the macro base station information includes a cell number, a sector number, a carrier frequency number, a PN, a subnet number (for DO), terminal information, including an IMSI, an ESN, a MEID, a UATI, a telephone number, and a pico base station information of the registration, Contains the pico base station ID, cell number, sector number, PN, and frequency point number.
  • the recording of the triplet it may be recorded once when the macro is dropped to the F, or may be recorded by using the sliding time window method after reaching a certain number of times. Specific implementations can be determined for specific scenarios.
  • FIG. 6 is a second schematic diagram of an application scenario of cell handover according to an embodiment of the present invention. If the pico base station itself is already in the handover area of the macro base station, as shown in FIG. 6, the coverage area of the macro base station 1 is A, and the coverage area of the macro base station 2 is For C.
  • the terminal may switch from the coverage area A of the macro base station to the coverage area B of the pico base station, or may switch from the macro sector C to the pico base station B area. Since the information of the macro base station is cut out, it is two independent ternary units. Groups, do not affect each other. Similarly, for the same macro base station, different terminals cut into the coverage area of the same pico base station, which are also different triples, and do not affect each other.
  • FIG. 7 is a third schematic diagram of an application scenario of cell handover according to an embodiment of the present invention. As shown in FIG. 7, multiple pico base stations exist under the same macro base station, and the same terminal may enter the coverage area of the pico base station 1, and may also enter the coverage area D of the pico base station 2.
  • the macro base station can notify the two pico base stations to simultaneously receive the resources used by the terminal to cut in, and finally only one of the handovers is successful, or both of them fail to switch (when the handover failure branch times out, the originally prepared resources are released).
  • the switch As long as one of the handovers is successful, it is recorded as successful handover. Regardless of whether the switch is successful or not, the corresponding two triples are counted according to the actual switching situation (when the switch is successful, the triplet without the terminal cut is recorded as failure).
  • the record including the base station information, the terminal information, and the pico base station information can be stored on the network side, and the handover of the terminal from the macro base station to the pico base station can be implemented according to the record. Since the traditional pre-configured neighboring cell mode is abandoned, the cell number, sector number, carrier frequency number, and PN that are necessary for the neighboring cell configuration cannot be repeated. All non-adjacent pico base stations can use the same cell. The number, sector number, and PN are distinguished by an unrestricted number of pico base station IDs. Therefore, resources such as PN are saved, application scenarios are very extensive, and network planning is simpler.
  • the embodiment of the present invention further provides a network side device to implement a cell handover method on the network side in the foregoing embodiment.
  • 8 is a functional block diagram of a network side device according to the embodiment.
  • the network side device includes: a receiving device 801, configured to receive a cell handover request sent by a source base station, where the handover request includes source base station information. And the terminal information that needs to be switched; the querying device 802 is configured to query a triplet composed of the source base station information, the terminal information, and the target pico base station information, and obtain a target pico corresponding to the terminal information that needs to be switched.
  • Base station information is when the terminal switches from the source base station to the target pico base station, the network side device obtains the source base station information and the dropped call terminal information according to the self, and according to the target pico a sending device 803, configured to notify the target pico base station to perform handover resource preparation, and send the required information to the target pico base station
  • the terminal to be switched sends a handover command to switch the terminal to the corresponding target pico base station.
  • the sending device 803 is specifically configured to: Notifying the corresponding plurality of target pico base stations to perform handover resource preparation, and transmitting a handover instruction to the terminal that needs to be handed over, where the handover instruction includes the plurality of target pico base station information.
  • the receiving device 801 of the embodiment is further configured to receive a handover result sent by the target pico base station.
  • the network side device further includes: an updating device 804, configured to update the triplet according to the switching result.
  • the updating device 804 is specifically configured to: when the number of handover failures increases to a preset first upper limit, delete the triplet according to the handover; or when the number of handover failures increases to a preset first upper limit The value, and the number of successes is reduced from the preset second upper limit to zero, and the triplet on which the switch is based is deleted.
  • the macro base station information may include one of a cell number, a sector number, a carrier frequency number, a PN, a subnet number, or a combination thereof;
  • the terminal information may include an international mobile subscriber identity code, an emergency service number, and a mobile terminal.
  • the pico base station information may include one of a pico base station identifier, a cell number, a sector number, a PN, a frequency point number, or a combination thereof.
  • the network side device may be an MSCe, an MGW, a BSC, an FGW, an NMS, a PDSN, or an HLR.
  • MSCe Mobility Management Entity
  • MGW Mobility Management Entity
  • BSC BSC
  • FGW Packet Data Network
  • NMS Network Management Entity
  • PDSN Packet Data Network
  • HLR Home Location Register
  • the network side device of this embodiment stores a record including base station information, terminal information, and pico base station information, and according to the record, the terminal can switch from the macro base station to the pico base station; further, by counting and updating the triplet , you can improve the switching success rate.
  • FIG. 9 is a functional block diagram of a pico base station according to the embodiment.
  • the pico base station includes: an information sending apparatus 901, if a terminal disconnects from a source base station to the pico base station, and performs a call drop to the pico base station.
  • Registering, or the terminal switches from the source base station to the pico base station, and the service is reestablished within the range of the pico base station; and the dropped terminal information and the pico base station information are sent to the network side device, so that the The network side device constructs a triplet including source base station information, terminal information, and the pico base station information.
  • the switching device 902 if the terminal sends a cell handover request to the network side device, the cell handover request includes source base station information and needs to be switched.
  • the terminal information is received, and the handover preparation message sent by the network side device is received, where the handover preparation message is sent by the network side device according to the terminal information that needs to be switched and the triplet;
  • the message prepares to switch the required resources, so that the terminal switches from the source base station to The pico base station.
  • the information sending apparatus 901 is further configured to send a handover result message to the network side device, so that the network side device updates the triplet stored by itself according to the handover result message.
  • the pico base station of the embodiment of the present invention can switch the terminal after receiving the notification sent by the network side device, so as to implement the handover of the terminal from the macro base station to the pico base station; and, the pico base station information and the terminal information can also be sent to the network side device.
  • the triplet is generated.
  • the handover result may be sent to enable the network side device to perform statistics on the handover result and update the triplet to improve the handover success rate.
  • the embodiment of the invention further provides a cell handover system, which includes the network side device and the pico base station described in the foregoing embodiments.
  • the working principle of the network side device and the pico base station in the system is detailed. Description of the foregoing embodiment.
  • a triplet record including base station information, terminal information, and pico base station information is stored on the network side, and handover of the terminal from the macro base station to the pico base station is implemented according to the record. Since the traditional pre-configured neighboring cell mode is abandoned, the cell number, sector number, carrier frequency number, and PN that are necessary for the neighboring cell configuration cannot be repeated. All non-adjacent pico base stations can use the same cell. The number, sector number, and PN are distinguished by an unrestricted number of pico base station IDs. Therefore, resources such as PN are saved, application scenarios are very extensive, and network planning is simpler.
  • the steps of a method or algorithm described in connection with the embodiments disclosed herein may be implemented in hardware, a software module executed by a processor, or a combination of both.
  • the software module can be placed in random access memory (RAM), memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or technical field. Any other form of storage medium known.

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Description

小区切换方法、 装置与系统 本申请要求于 2010 年 12 月 29 日提交中国专利局、 申请号为 201010612074.2、 发明名称为 "小区切换方法、 装置与系统"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 本发明涉及移动通信技术领域， 特别涉及一种小区切换方法、 装置与 系统。
背景技术 在无线通信系统中， 不仅有解决广覆盖的宏基站（Macro cell) , 和解决 话务量 /吞吐量密集的热点地区覆盖的微基站 （Micro cell) , 还有覆盖范围 更小的微微基站（Femto cell)。 微微基站主要应用于家庭、 或者商场、 写字 楼等， 其作为一种新的基站形态发展迅速。
目前， 终端从微微基站切换到宏基站时， 通过微微基站自动检测宏基 站信号， 在微微基站侧添加宏基站邻区， 满足切换需要。 然而， 从宏基站 扇区到微微基站区域都不配置切换关系， 所以， 终端从宏基站区域进入微 微基站区域时会出现掉话现象。
为解决上述的从宏基站到微微基站的小区切换问题， 出现了通过人工 手动配置基站邻区的技术方案， 把微微基站看作普通扇区， 在宏基站上正 常手动配置邻区关系。
但是， 发明人发现这种技术方案的缺陷在于： 微微基站的数量多， 同 一个宏扇区下， 可能有几十上百个微微基站， 而宏基站的邻区数是有限的; 并且， 伪随机序列 （PN， Pseudo random Noise) 码总数有限， 由于同一个 基站的邻区中不能有相同的 PN，实际上一个基站周围可配置的 PN数不多。 因此， 人工手动配置基站邻区的方法将导致邻区数和 PN数不足的问题； 此 外， 一般用户买到微微基站后自行安装， 无法统一规划微微基站的应用。
发明内容 本发明实施例提供一种小区切换方法、 装置与系统， 目的在于实现终 端从宏基站到微微基站的切换， 并解决邻区数和 PN数不足的问题。
为达到上述目的， 本发明实施例提供一种小区切换方法， 所述方法包 括： 网络侧设备接收源基站发送的小区切换请求， 所述切换请求中包含了 源基站信息以及需要切换的终端信息； 所述网络侧设备查询由源基站信息、 终端信息以及目标微微基站信息三者对应关系所构成的三元组， 获得与所 述需要切换的终端信息对应的目标微微基站信息； 所述三元组是当终端从 源基站切换至目标微微基站发生掉话时， 所述网络侧设备根据自身获取的 所述源基站信息和掉话终端信息， 以及根据所述目标微微基站发送的所述 掉话终端信息和所述目标微微基站信息而生成的； 所述网络侧设备通知所 述目标微微基站进行切换资源准备， 并向所述需要切换的终端发送切换指 令， 使所述终端切换至对应的目标微微基站。
本发明实施例还提供一种网络侧设备， 所述网络侧设备包括： 接收装 置， 用于接收源基站发送的小区切换请求， 所述切换请求中包含了源基站 信息以及需要切换的终端信息； 查询装置， 用于查询由源基站信息、 终端 信息以及目标微微基站信息三者对应关系所构成的三元组， 获得与所述需 要切换的终端信息对应的目标微微基站信息； 所述三元组是当终端从源基 站切换至目标微微基站发生掉话时， 所述网络侧设备根据自身获取的所述 源基站信息和掉话终端信息， 以及根据所述目标微微基站发送的所述掉话 终端信息和所述目标微微基站信息而生成的； 发送装置， 用于通知所述目 标微微基站进行切换资源准备， 并向所述需要切换的终端发送切换指令， 使所述终端切换至对应的目标微微基站。
本发明实施例还提供一种小区切换方法， 所述方法包括： 如果终端从 源基站切换至目标微微基站发生掉话， 并且向所述目标微微基站进行登记， 或者终端从源基站切换至目标微微基站发生掉话， 并且在所述目标微微基 站范围内重建业务； 所述目标微微基站向网络侧设备发送所述掉话终端信 息以及所述目标微微基站信息， 使得所述网络侧设备构造包含源基站信息、 终端信息以及目标微微基站信息的三元组； 如果终端向网络侧设备发送小 区切换请求， 所述小区切换请求包含了源基站信息以及需要切换的终端信 息， 所述目标微微基站接收所述网络侧设备发送的切换准备消息， 所述切 换准备消息为所述网络侧设备根据所述需要切换的终端信息和所述三元组 发送的； 所述目标微微基站根据所述切换准备消息准备切换需要的资源， 使得所述终端从源基站切换到所述目标微微基站。
本发明实施例还提供一种微微基站， 所述微微基站包括： 信息发送装 置， 如果终端从源基站切换至所述微微基站发生掉话， 并且向所述微微基 站进行登记， 或者终端从源基站切换至所述微微基站发生掉话， 并且在所 述微微基站范围内重建业务； 则向网络侧设备发送所述掉话终端信息以及 所述微微基站信息， 使得所述网络侧设备构造包含源基站信息、 终端信息 以及所述微微基站信息的三元组； 切换装置， 如果终端向网络侧设备发送 小区切换请求， 所述小区切换请求包含了源基站信息以及需要切换的终端 信息， 则接收所述网络侧设备发送的切换准备消息， 所述切换准备消息为 所述网络侧设备根据所述需要切换的终端信息和所述三元组发送的； 根据 所述切换准备消息准备切换需要的资源， 使得所述终端从源基站切换到所 述微微基站。
本发明实施例还提供一种小区切换系统， 所述系统包括前述实施例所 述的网络侧设备和微微基站。
本发明实施例的有益效果在于， 通过在网络侧设备保存包括源基站信 息、 终端信息和微微基站信息的记录， 根据该记录实现终端从源基站到微 微基站的切换。 并且， 回避了邻区配置时必须的小区号、 扇区号、 载频号 及 PN都无法重复的限制， 节省了 PN等资源， 应用场景非常广泛， 网络的 规划更加简单。
附图说明 此处所说明的附图用来提供对本发明的进一歩理解， 构成本申请的一 部分， 并不构成对本发明的限定。 在附图中：
图 1是本发明实施例中小区切换系统的的组网结构实例图；
图 2是本发明实施例中小区切换方法在网络侧的流程图；
图 3是本发明实施例中小区切换方法在微微基站侧的流程图； 图 4是本发明实施例中小区切换的应用场景示意图之一；
图 5是本发明实施例中小区切换方法的完整信令交互流程示意图； 图 6是本发明实施例中小区切换的应用场景示意图之二；
图 7是本发明实施例中小区切换的应用场景示意图之三；
图 8是本发明实施例中的网络侧设备的功能框图；
图 9是本发明实施例中的微微基站的功能框图。
具体实施方式 为使本发明的目的、 技术方案和优点更加清楚明白， 下面结合附图对 本发明实施例作进一歩详细说明。 在此， 本发明的示意性实施例及其说明 用于解释本发明， 但并不作为对本发明的限定。
本发明实施例提供一种小区切换方法， 应用于终端从源基站切换到微 微基站的过程中， 本发明实施例的源基站可以是宏基站或者是微微基站， 后续实施例中将以源基站是宏基站为例进行说明。 该小区切换方法适用于 介入第二代和第三代之间的码分多址接入 （CDMA 1X)、 增强型的码分多 址接入 （CDMA EVDO ) 系统； 此外， 还可应用于宽带码分多址接入 (WCDMA, Wideband Code Division Multiple Access), 时分同歩码分多址 接入 ( TD-SCDMA , Time Division Synchronous Code Division Multiple Access),全球移云力通信系统（GSM, Global System Mobile Communications )、 长期演进 （LTE， Long Term Evolution )、 全球微波互联接入 （WiMAX, Worldwide Interoperability for Microwave Access) 等需要酉己置邻区的无线通 信系统。 但不限于此， 可根据实际情况确定具体的实施场景。
在本实施例中涉及的设备包括： 终端、 源基站和微微基站； 此外， 还 包括网络侧的用于小区切换的网络侧设备， 该网络侧设备可为以下任意一 种： 移动交换中心仿真 (MSCe, Mobile Switching Center Emulation), 媒体 网关（MGW， Media GateWay),基站控制器（BSC, Base Station Controller), 微微基站网关 （FGW， Femto GateWay), 网络管理系统 （NMS， Network Management System )、 分组数据服务节点 （PDSN , Packet Data Serving Node), 归属位置寄存器（HLR， Home Location Register)和新增的服务器， 但不限于此， 可根据实际情况确定具体的网络侧设备。
图 1为本发明实施例中小区切换系统的组网结构实例图。 如图 1所示， 该组网结构中包括： 微微基站 101、 宏基站 102、 终端 103 ; 此外， 还包括 安全网关（SeGW, Security Gate Way) 104、 NMS 105、 FGW 106、 MSCe 107、 MGW 108、 BSC 109和 PDSN 110。 以上组网结构仅为示意性说明， 但不限 于此， 可根据实际情况确定具体的组网结构。
下面从网络侧和微微基站侧分别对本发明实施例的小区切换方法进行 说明。
网络侧：
图 2为本发明实施例中该小区切换方法在网络侧的流程图， 如图 2所 示， 该方法包括： 歩骤 201， 网络侧设备接收源基站发送的小区切换请求， 所述切换请求 中包含了源基站信息以及需要切换的终端信息；
歩骤 202， 所述网络侧设备查询由源基站信息、终端信息以及目标微微 基站信息三者对应关系所构成的三元组， 获得与所述需要切换的终端信息 对应的目标微微基站信息； 所述三元组是当终端从源基站切换至目标微微 基站发生掉话时， 所述网络侧设备根据自身获取的所述源基站信息和掉话 终端信息， 以及根据所述目标微微基站发送的所述掉话终端信息和所述目 标微微基站信息而生成的；
歩骤 203， 所述网络侧设备通知所述目标微微基站进行切换资源准备， 并向所述需要切换的终端发送切换指令， 使所述终端切换至对应的目标微 微基站。
如图 1所示， 可选地， 本实施例的网络侧设备为 MSCe 107， 源基站为 宏基站 102; 但是在实际应用中， 网络侧设备还可以为其他能够实现等同功 能的设备， 源基站也可以是微微基站。
其中， 宏基站信息可包括小区号、 扇区号、 载频号、 PN、 子网号中的 一种或其组合； 终端信息可包括国际移动用户标识码 （IMSI, International Mobile Subscriber Identification 紧急月艮务号码 (ESN, Emergency Service Number), 移动终端标识号 （MEID, Mobile Equipment Identification), 用 户接入标识号（UATI, Unicast Access Terminal Identifier), 电话号码中的一 种或其组合； 微微基站信息可包括微微基站标识、 小区号、 扇区号、 PN、 频点号中的一种或其组合。
在本实施例中， 终端在从宏基站切换到微微基站设备之前， 通过宏基 站实现呼叫业务。 因此， 网络侧设备可在接收到微微基站发送的微微基站 信息和终端信息之后， 根据微微基站信息和终端信息查找呼叫日志， 这样 可预先获得宏基站信息。
可选地， 当与源基站信息以及终端信息对应的目标微微基站为多个时; S203具体包括： 通知所述多个目标微微基站进行切换资源准备， 并向所述 需要切换的终端发送切换指令， 所述切换指令中包含所述多个目标微微基 站信息。
可选地， 所述方法还包括： 所述网络侧设备接收所述目标微微基站发 送的切换结果； 并根据所述切换结果对所述三元组进行更新。
如： 当切换失败次数增加到预设的第一上限值时， 删除切换所依据的 三元组； 或者当切换次数增加到预设的第一上限值， 且成功次数从预设的 第二上限值减为零时， 删除切换所依据的三元组。 由此， 可以根据多次切 换结果更新记录， 从而更好地保证切换的成功率。
一种可选的更新方法为： 设置失败次数的最大值， 并且若切换结果为 失败， 则增加一次失败次数； 当切换结果的失败次数达到最大值时， 删除 三元组。 例如， 可设置最大失败次数为 20次， 初始失败次数为 0; 每失败 一次对失败次数加一。 当失败次数达到 20时， 认为这个三元组需要更新， 则将此三元组删除。
另一种可选的更新方法为：： 设置成功次数和失败次数的最大值； 若切 换结果为成功， 则增加一次成功次数； 若切换结果为失败， 则增加一次失 败次数； 并且， 在成功次数达到最大值后， 再次接收到的切换结果为成功 时， 减少失败次数一次； 在失败次数达到最大值后， 再次接收到的切换结 果为失败时， 减少成功次数一次； 当失败次数达到最大值， 且成功次数为 零时， 删除三元组。 例如， 可设置最大成功次数 255次， 最大失败次数 20 次。 当累计的成功次数达到 255次后， 不再增大， 每成功一次对失败次数 减 1 ; 反过来， 最大失败次数达到 20次后， 也不再增加， 每失败一次对成 功次数减 1。 并且， 当失败次数达到 20， 且成功次数减到 0后， 认为这个 三元组需要更新， 则将此三元组删除。
通过上述歩骤， 可在网络侧保存包括基站信息、 终端信息和微微基站 信息的三元组记录， 根据该记录可实现终端从源基站到微微基站的切换。 进一歩的， 通过对三元组进行统计和更新， 可以进一歩提高切换成功率。 微微基站侧：
图 3为本发明实施例中该小区切换方法在微微基站侧的流程图，如图 3 所示， 该方法包括：
歩骤 301， 如果终端从源基站切换至目标微微基站发生掉话， 并且向所 述目标微微基站进行登记， 或者终端从源基站切换至目标微微基站发生掉 话， 并且在所述目标微微基站范围内重建业务， 所述目标微微基站向网络 侧设备发送所述掉话终端信息以及所述目标微微基站信息； 使得所述网络 侧设备构造包含源基站信息、 终端信息以及目标微微基站信息的三元组； 歩骤 302， 如果终端向网络侧设备发送小区切换请求， 所述小区切换请 求包含了源基站信息以及需要切换的终端信息， 所述目标微微基站接收所 述网络侧设备发送的切换准备消息， 所述切换准备消息为所述网络侧设备 根据所述需要切换的终端信息和所述三元组发送的；
歩骤 303，所述目标微微基站根据所述切换准备消息准备切换需要的资 源， 使得所述终端从源基站切换到所述目标微微基站。
可选地， 本实施的方法还包括： 所述目标微微基站向所述网络侧设备 发送切换结果消息， 使所述网络侧设备根据所述切换结果消息对自身存储 的三元组进行更新。
通过上述歩骤， 可使得网络侧生成并保存包括基站信息、 终端信息和 微微基站信息的记录； 并且， 微微基站接收根据该记录发送的准备切换的 通知， 实现终端从宏基站到微微基站的切换。
以下结合附图 4、 5， 通过终端、 微微基站、 宏基站和网络侧设备之间 的交互对上述小区切换方法进行进一歩说明。
图 4为本发明实施例小区切换的应用场景示意图之一。 如图 4所示， 宏基站的覆盖区域为 A， 微微基站的覆盖区域为 B; 终端从区域 A进入区 域 B时进行小区切换。 图 5 为本发明实施例的小区切换方法的完整信令交互流程示意图。 如 图 5所示， 该方法包括：
歩骤 501， 宏基站向网络侧设备发起切换请求； 其中， 该网络侧设备保 存有包括宏基站信息、 终端信息和微微基站信息的三元组。
在本实施例中， 当在网络侧设备中已有三元组记录的终端， 再次从宏 基站的覆盖区域进入微微基站的覆盖区域， 在宏基站的覆盖区域 A下面的 信号变差， 并且没有检测到可用的切换分支时， 可以由宏基站向网络侧设 备发起一次宏基站到微微基站的切换。
歩骤 502， 网络侧设备根据三元组通知对应的微微基站设备准备切换。 在本实施例中， 网络侧设备可根据终端的信息、 或者终端及宏基站的 信息查询三元组， 确定对应的微微基站。
歩骤 503， 网络侧设备根据三元组向终端发送切换的指令。
在本实施例中， 可以由 MSCe通知目标微微基站准备接收终端， 并准 备相应资源， 然后通知终端启动切换， 终端侧看到的是标准硬切换。
歩骤 504， 终端切换到微微基站上。
歩骤 505， 微微基站向网络侧设备发送成功或者失败的切换结果。
歩骤 506， 网络侧设备接收微微基站发送的切换结果； 统计切换结果的 成功次数和 /或失败次数进行统计， 并根据统计结果更新三元组。
可选地， 本实施例中网络侧设备生成三元组的过程包括以下几个歩骤: 歩骤 1、终端从宏基站切换至目标微微基站发生掉话， 并且向所述目标 微微基站进行登记； 或者终端从源基站切换至目标微微基站发生掉话， 并 且在所述目标微微基站范围内重建业务。
在本实施例中，当终端首次从宏基站区域 A进入到微微基站区域 B时， 会因为没有配置切换关系而掉话。如果掉话后， 在一定时间范围 t以内， 该 终端在微微基站区域 B进行登记， 就认为出现了宏基站 A到微微基站 B的 切换掉话， 可以简称为宏到 F掉话。 此外， 也可以用在微微基站区域 B重 新建立业务作为切换的判决条件。
歩骤 2、 目标微微基站将自身信息和掉话终端信息向网络侧设备发送。 在本实施例中， 当出现宏到 F掉话时， 微微基站设备可将微微基站信 息和终端信息发送至 MSCe。
歩骤 3、 网络侧设备生成并保存三元组。
在本实施例中， MSCe可预先获得宏基站信息， 因此， MSCe可以记 录一个关于本次掉话的三元组， 用来作以后切换时的参考， 该三元组包括 宏基站信息、 终端信息和微微基站信息。
其中， 宏基站信息， 包含小区号、 扇区号、 载频号、 PN、 子网号 （针 对 DO); 终端信息， 包含 IMSI、 ESN、 MEID、 UATI、 电话号码； 登记所 处的微微基站信息， 包含微微基站 ID、 小区号、 扇区号、 PN、 频点号。
在本实施例中， 对于三元组的记录， 可以是出现一次宏到 F掉话就记 录一次； 也可以采用滑动时间窗方式， 在达到一定次数后再记录。 可以针 对具体的场景， 确定具体的实施方式。
图 6为本发明实施例小区切换的应用场景示意图之二， 如果微微基站 本身已处在宏基站的切换区， 如图 6所示， 宏基站 1的覆盖区域为 A， 宏 基站 2的覆盖区域为 C。
则终端可能从宏基站的覆盖区域 A切换到微微基站的覆盖区域 B， 也 可能从宏扇区 C切换到微微基站 B区域， 由于切出宏基站的信息不同， 所 以是两条独立的三元组， 互相之间不影响。 同理， 对于同一个宏基站， 不 同终端切入同一个微微基站的覆盖区域， 也都是不同的三元组， 互相之间 不影响。
所以， 可以根据终端信息和切出宏基站信息去查询微微基站信息， 如 果终端和宏基站信息确定对应唯一微微基站， 则可保证切换的准确。 如果 终端和宏基站信息确定出多个微微基站， 也就是同一个宏扇区下有多个微 微基站， 就需要更复杂的操作。 图 η为本发明实施例小区切换的应用场景示意图之三。 如图 7所示， 同一宏基站下存在多个微微基站， 同一终端可能进入微微基站 1 的覆盖区 域 Β,也可能进入微微基站 2的覆盖区域 D。则宏基站可通知两个微微基站 同时准备接收终端切入所用的资源， 最终只会有其中的一路切换成功， 或 者两个都切换失败 （切换失败分支超时， 则释放原来准备的资源）。
只要有其中一个切换成功， 则记为切换成功。 无论切换是否成功， 对 应的两个三元组都根据实际切换情况， 进行一次计数 （当切换成功时， 没 有终端切入的三元组记成失败）。
以上仅为对切换的示意性说明， 但不限于此， 可根据实际情况确定具 体的实施方式。
由上述实施例可知， 可在网络侧保存包括基站信息、 终端信息和微微 基站信息的记录， 根据该记录实现终端从宏基站到微微基站的切换。 由于 放弃了传统的提前配置邻区方式， 也就回避了邻区配置时必须的小区号、 扇区号、载频号及 PN都无法重复的限制； 所有不相邻的微微基站可以用相 同的小区号、 扇区号和 PN， 而采用数量不受限制的微微基站 ID进行区别。 因此， 节省了 PN等资源， 应用场景非常广泛， 网络的规划更加简单。
本发明实施例还提供一种网络侧设备， 以实现前述实施例中网络侧的 小区切换方法。 图 8为本实施例网络侧设备的功能框图， 如图 8所示， 该 网络侧设备包括： 接收装置 801， 用于接收源基站发送的小区切换请求， 所 述切换请求中包含了源基站信息以及需要切换的终端信息； 查询装置 802， 用于查询由源基站信息、 终端信息以及目标微微基站信息三者对应关系所 构成的三元组， 获得与所述需要切换的终端信息对应的目标微微基站信息; 所述三元组是当终端从源基站切换至目标微微基站发生掉话时， 所述网络 侧设备根据自身获取的所述源基站信息和掉话终端信息， 以及根据所述目 标微微基站发送的所述掉话终端信息和所述目标微微基站信息而生成的； 发送装置 803， 用于通知所述目标微微基站进行切换资源准备， 并向所述需 要切换的终端发送切换指令， 使所述终端切换至对应的目标微微基站 可选地， 当与所述源基站信息以及终端信息对应的目标微微基站为多 个时； 发送装置 803， 具体用于通知对应的多个目标微微基站进行切换资源 准备， 并向所述需要切换的终端发送切换指令， 所述切换指令中包含所述 多个目标微微基站信息。
可选地， 本实施例的接收装置 801， 还用于接收所述目标微微基站发送 的切换结果。 如图 8所示， 网络侧设备还包括： 更新装置 804， 用于根据所 述切换结果对所述三元组进行更新。
可选地， 更新装置 804， 具体用于当切换失败次数增加到预设的第一上 限值时， 删除切换所依据的三元组； 或者当切换失败次数增加到预设的第 一上限值， 且成功次数从预设的第二上限值减为零时， 删除切换所依据的 三元组。
如： 设置成功次数和失败次数的最大值； 若切换结果为成功， 则增加 一次成功次数； 若切换结果为失败， 则增加一次失败次数； 并且， 在成功 次数达到最大值后， 再次接收到的切换结果为成功时， 减少失败次数一次; 在失败次数达到最大值后， 再次接收到的切换结果为失败时， 减少成功次 数一次； 当切换结果的失败次数达到最大值、 和 /或成功次数为零时， 删除 三元组。
在本实施例中， 宏基站信息可包括小区号、 扇区号、 载频号、 PN、 子 网号中的一种或其组合； 终端信息可包括国际移动用户标识码、 紧急服务 号码、 移动终端标识号、 用户接入标识号、 电话号码中的一种或其组合； 微微基站信息可包括微微基站标识、 小区号、 扇区号、 PN、 频点号中的一 种或其组合。
在本实施例中， 网络侧设备可以为 MSCe、 MGW、 BSC, FGW、 NMS、 PDSN或者 HLR。 此外， 对于用户量大的网络， 还可以单独增加一个服务 器进行切换信息记录， 这样效果更好。 本实施例的网络侧设备保存有包括基站信息、 终端信息和微微基站信 息的记录， 根据该记录可实现终端从宏基站到微微基站的切换； 进一歩的， 通过对三元组进行统计和更新， 可以进一歩提高切换成功率。
本发明实施例还提供一种微微基站， 以实现前述实施例中微微基站侧 的小区切换方法。 图 9为本实施例微微基站的功能框图， 如图 9所示， 该 微微基站包括： 信息发送装置 901， 如果终端从源基站切换至所述微微基站 发生掉话， 并且向所述微微基站进行登记， 或者终端从源基站切换至所述 微微基站发生掉话， 并且在所述微微基站范围内重建业务； 则向网络侧设 备发送所述掉话终端信息以及所述微微基站信息， 使得所述网络侧设备构 造包含源基站信息、 终端信息以及所述微微基站信息的三元组； 切换装置 902， 如果终端向网络侧设备发送小区切换请求， 所述小区切换请求包含了 源基站信息以及需要切换的终端信息， 则接收所述网络侧设备发送的切换 准备消息， 所述切换准备消息为所述网络侧设备根据所述需要切换的终端 信息和所述三元组发送的； 根据所述切换准备消息准备切换需要的资源， 使得所述终端从源基站切换到所述微微基站。
可选地， 所述信息发送装置 901， 还用于向所述网络侧设备发送切换结 果消息， 使所述网络侧设备根据所述切换结果消息对自身存储的三元组进 行更新。
本发明实施例的微微基站可在接收到网络侧设备发送的通知后切换终 端， 从而实现终端从宏基站到微微基站的切换； 并且， 还可将微微基站信 息和终端信息发送至网络侧设备以生成三元组； 此外， 还可发送切换结果 使得网络侧设备对切换结果进行统计并更新三元组， 以提高切换成功率。
本实施例的装置的各组成部分分别用于实现前述实施例的方法的各歩 骤， 由于在方法实施例中， 已经对各歩骤进行了详细说明， 在此不再赘述。
本发明实施例还提供一种小区切换系统， 其包括前述实施例所描述的 网络侧设备和微微基站。 该系统中网络侧设备和微微基站的工作原理详见 前述实施例的描述。
本发明实施例的技术方案， 在网络侧保存了包括基站信息、 终端信息 和微微基站信息的三元组记录， 根据该记录实现终端从宏基站到微微基站 的切换。 由于放弃了传统的提前配置邻区方式， 也就回避了邻区配置时必 须的小区号、扇区号、 载频号及 PN都无法重复的限制； 所有不相邻的微微 基站可以用相同的小区号、 扇区号和 PN， 而采用数量不受限制的微微基站 ID进行区别。 因此， 节省了 PN等资源， 应用场景非常广泛， 网络的规划 更加简单。
本领域普通技术人员还可以进一歩意识到， 结合本文中所公开的实施 例描述的各示例的单元及算法歩骤， 能够以电子硬件、 计算机软件或者二 者的结合来实现， 为了清楚地说明硬件和软件的可互换性， 在上述说明中 已经按照功能一般性地描述了各示例的组成及歩骤。 这些功能究竟以硬件 还是软件方式来执行， 取决于技术方案的特定应用和设计约束条件。 专业 技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能， 但 是这种实现不应认为超出本发明的范围。
结合本文中所公开的实施例描述的方法或算法的歩骤可以用硬件、 处 理器执行的软件模块， 或者二者的结合来实施。 软件模块可以置于随机存 储器 （RAM)、 内存、 只读存储器 （ROM)、 电可编程 ROM、 电可擦除可 编程 ROM、 寄存器、 硬盘、 可移动磁盘、 CD-ROM、 或技术领域内所公知 的任意其它形式的存储介质中。
以上所述的具体实施方式， 对本发明的目的、 技术方案和有益效果进 行了进一歩详细说明， 所应理解的是， 以上所述仅为本发明的具体实施方 式而已， 并不用于限定本发明的保护范围， 凡在本发明的精神和原则之内， 所做的任何修改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种小区切换方法， 其特征在于， 所述方法包括：
网络侧设备接收源基站发送的小区切换请求， 所述切换请求中包含了 源基站信息以及需要切换的终端信息；
所述网络侧设备查询由源基站信息、 终端信息以及目标微微基站信息 三者对应关系所构成的三元组， 获得与所述需要切换的终端信息对应的目 标微微基站信息； 所述三元组是当终端从源基站切换至目标微微基站发生 掉话时， 所述网络侧设备根据自身获取的所述源基站信息和掉话终端信息， 以及根据所述目标微微基站发送的所述掉话终端信息和所述目标微微基站 信息而生成的；
所述网络侧设备通知所述目标微微基站进行切换资源准备， 并向所述 需要切换的终端发送切换指令， 使所述终端切换至对应的目标微微基站。
2、 根据权利要求 1所述的方法， 其特征在于， 当与所述源基站信息以 及终端信息对应的目标微微基站为多个时； 所述网络侧设备通知所述目标 微微基站进行切换资源准备， 并向所述需要切换的终端发送切换指令包括: 通知所述多个目标微微基站进行切换资源准备， 并向所述需要切换的 终端发送切换指令， 所述切换指令中包含所述多个目标微微基站信息。
3、 根据权利要求 1所述的方法， 其特征在于， 所述方法还包括： 所述网络侧设备接收所述目标微微基站发送的切换结果； 并根据所述 切换结果对所述三元组进行更新。
4、 根据权利要求 3所述的方法， 其特征在于， 所述网络侧设备根据所 述切换结果对所述三元组进行更新包括：
当切换失败次数增加到预设的第一上限值时， 删除切换所依据的三元 组。
5、 根据权利要求 3所述的方法， 其特征在于， 所述网络侧设备根据所 述切换结果对所述三元组进行更新还包括：
当切换次数增加到预设的第一上限值， 且成功次数从预设的第二上限 值减为零时， 删除切换所依据的三元组。
6、 一种网络侧设备， 其特征在于， 所述网络侧设备包括：
接收装置， 用于接收源基站发送的小区切换请求， 所述切换请求中包 含了源基站信息以及需要切换的终端信息；
查询装置， 用于查询由源基站信息、 终端信息以及目标微微基站信息 三者对应关系所构成的三元组， 获得与所述需要切换的终端信息对应的目 标微微基站信息； 所述三元组是当终端从源基站切换至目标微微基站发生 掉话时， 所述网络侧设备根据自身获取的所述源基站信息和掉话终端信息， 以及根据所述目标微微基站发送的所述掉话终端信息和所述目标微微基站 信息而生成的；
发送装置， 用于通知所述目标微微基站进行切换资源准备， 并向所述 需要切换的终端发送切换指令， 使所述终端切换至对应的目标微微基站。
7、 根据权利要求 6所述的网络侧设备， 其特征在于， 当与所述源基站 信息以及终端信息对应的目标微微基站为多个时；
所述发送装置， 具体用于通知对应的多个目标微微基站进行切换资源 准备， 并向所述需要切换的终端发送切换指令， 所述切换指令中包含所述 多个目标微微基站信息。
8、 根据权利要求 6所述的网络侧设备， 其特征在于，
所述接收装置， 还用于接收所述目标微微基站发送的切换结果； 所述网络侧设备还包括： 更新装置， 用于根据所述切换结果对所述三 元组进行更新。
9、 根据权利要求 8所述的网络侧设备， 其特征在于，
所述更新装置， 具体用于当切换失败次数增加到预设的第一上限值时， 删除切换所依据的三元组。
10、 根据权利要求 8所述的网络侧设备， 其特征在于， 所述更新装置， 还具体用于当切换失败次数增加到预设的第一上限值， 且成功次数从预设的第二上限值减为零时， 删除切换所依据的三元组。
11、 一种小区切换方法， 其特征在于， 所述方法包括：
如果终端从源基站切换至目标微微基站发生掉话， 并且向所述目标微 微基站进行登记， 或者终端从源基站切换至目标微微基站发生掉话， 并且 在所述目标微微基站范围内重建业务； 所述目标微微基站向网络侧设备发 送所述掉话终端信息以及所述目标微微基站信息， 使得所述网络侧设备构 造包含源基站信息、 终端信息以及目标微微基站信息的三元组；
如果终端向网络侧设备发送小区切换请求， 所述小区切换请求包含了 源基站信息以及需要切换的终端信息， 所述目标微微基站接收所述网络侧 设备发送的切换准备消息， 所述切换准备消息为所述网络侧设备根据所述 需要切换的终端信息和所述三元组发送的；
所述目标微微基站根据所述切换准备消息准备切换需要的资源， 使得 所述终端从源基站切换到所述目标微微基站。
12、 根据权利要求 11所述的方法， 其特征在于， 所述方法还包括： 所述目标微微基站向所述网络侧设备发送切换结果消息， 使所述网络 侧设备根据所述切换结果消息对自身存储的三元组进行更新。
13、 一种微微基站， 其特征在于， 所述微微基站包括：
信息发送装置， 如果终端从源基站切换至所述微微基站发生掉话， 并 且向所述微微基站进行登记， 或者终端从源基站切换至所述微微基站发生 掉话， 并且在所述微微基站范围内重建业务； 则向网络侧设备发送所述掉 话终端信息以及所述微微基站信息， 使得所述网络侧设备构造包含源基站 信息、 终端信息以及所述微微基站信息的三元组；
切换装置， 如果终端向网络侧设备发送小区切换请求， 所述小区切换 请求包含了源基站信息以及需要切换的终端信息， 则接收所述网络侧设备 发送的切换准备消息， 所述切换准备消息为所述网络侧设备根据所述需要 切换的终端信息和所述三元组发送的； 根据所述切换准备消息准备切换需 要的资源， 使得所述终端从源基站切换到所述微微基站。
14、 根据权利要求 13所述的微微基站， 其特征在于，
所述信息发送装置， 还用于向所述网络侧设备发送切换结果消息， 使 所述网络侧设备根据所述切换结果消息对自身存储的三元组进行更新。
15、 一种小区切换系统， 其特征在于， 所述系统包括权利要求 6-10中 任意一项权利要求所述的网络侧设备以及权利要求 13或 14所述的微微基 站。
PCT/CN2011/083812 2010-12-29 2011-12-12 小区切换方法、装置与系统 WO2012089008A1 (zh)

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