WO2011137784A1 - 接入基站方法、基站和用户设备 - Google Patents

接入基站方法、基站和用户设备 Download PDF

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Publication number
WO2011137784A1
WO2011137784A1 PCT/CN2011/074218 CN2011074218W WO2011137784A1 WO 2011137784 A1 WO2011137784 A1 WO 2011137784A1 CN 2011074218 W CN2011074218 W CN 2011074218W WO 2011137784 A1 WO2011137784 A1 WO 2011137784A1
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WO
WIPO (PCT)
Prior art keywords
base station
user equipment
macro base
plane connection
micro
Prior art date
Application number
PCT/CN2011/074218
Other languages
English (en)
French (fr)
Inventor
张锦芳
戎璐
杜颖钢
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2011137784A1 publication Critical patent/WO2011137784A1/zh
Priority to US13/895,021 priority Critical patent/US9572078B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • 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
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • 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
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • 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
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H04W36/00695—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink using split of the control plane or user plane
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/304—Reselection being triggered by specific parameters by measured or perceived connection quality data due to measured or perceived resources with higher communication quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • Access base station method, base station and user equipment are Access base station method, base station and user equipment
  • the present invention relates to the field of communications technologies, and in particular, to a method for accessing a base station, a base station, and a user equipment.
  • the user's information exchange needs are mainly voice calls and short messages, which are not required for spectrum efficiency.
  • the system is mainly subject to the size of the coverage area. Therefore, the macro base station networking mode is generally adopted.
  • the spacing is generally large, and the cost of this networking method is low.
  • data transmission has become a new demand, especially for real-time video transmission.
  • the requirements for spectrum efficiency and book network throughput have increased significantly, but the coverage of macro base stations is large.
  • the number of users is large, so that the throughput of the macro base station is greatly limited.
  • the throughput requirement for the macro network is further increased.
  • the single-layer macro base station coverage can only meet the basic voice service requirements of the user, and cannot meet the high-speed data transmission requirements. It can be seen that the existing macro base station networking mode cannot meet the user's demand for high-speed data transmission.
  • the solution in the prior art adopts a multi-layer heterogeneous network architecture in which a macro base station and a micro base station coexist in a hotspot (see FIG. 1a), and the macro base station provides a wide range of continuous wide coverage,
  • the base station provides hotspot area coverage.
  • the user accesses the macro base station in the area where only the macro base station network is located, and preferentially accesses the micro base station to divert the traffic of the macro base station network in the area where the macro base station network and the micro base station network are covered, thereby obtaining better service.
  • the macro base station and the micro base station are two independent networks.
  • the base station When the user selects to access a base station, the base station establishes a control plane and a data plane connection with the user at the same time to provide air interface wireless transmission for the user, and the base station allocates and maintains a The unique Cell-Radio Network Temporary Identity (C-RNTI) is used to identify the RRC (Radio Resource Control) connection and uniquely identify the user in the scheduling.
  • C-RNTI Cell-Radio Network Temporary Identity
  • the source base station sends the context information of the user equipment such as the C-RNTI identifier to the target base station through the backbone network, and the destination base station allocates a new C-RNTI identifier to the user, and notifies the user through the air interface through the source base station.
  • the C-RNTI identifier maintained by the source base station is released after the base station successfully switches.
  • each micro-base station needs to be allocated a new cell radio network temporary identifier C-
  • the RNTI notifies the user of the update via wireless transmission, which not only reduces the efficiency of the base station, but also increases the information transmission of the backbone network and the wireless network. Reduce wireless resource utilization.
  • the embodiment of the invention provides a method for accessing a base station, a base station and a user equipment.
  • the technical solution is as follows: A method for accessing a base station, where the method includes:
  • the current macro base station establishes a control plane connection with the user equipment according to the access request of the user equipment, and allocates a first cell wireless network temporary identifier to the user equipment;
  • the user equipment When receiving the micro base station measurement report reported by the user equipment, selecting a micro base station for the user equipment according to a preset policy, so that the user equipment establishes a data plane connection with the micro base station, and the user equipment is connected
  • the context information is notified to the micro base station, and the context information includes a first cell radio network temporary identifier allocated to the user equipment.
  • a method for accessing a base station comprising:
  • a base station includes:
  • control plane connection establishing module configured to establish a control plane connection with the user equipment according to an access request of the user equipment, and allocate a first cell wireless network temporary identifier to the user equipment;
  • a first identifier maintenance module configured to: when receiving the micro base station measurement report reported by the user equipment, select a micro base station for the user equipment according to a preset policy, so that the user equipment establishes a data plane connection with the micro base station And notifying, to the micro base station, the context information of the user equipment, where the context information includes a first cell radio network temporary identifier allocated to the user equipment.
  • a user equipment comprising:
  • a first connection establishing module configured to establish a control plane connection with the macro base station, and receive a temporary identifier of the cell wireless network allocated by the macro base station;
  • a second establishing module configured to report the monitored micro base station measurement report, and access the micro base station selected by the macro base station according to the micro base station measurement report, and establish a data plane connection with the micro base station selected by the macro base station, where The micro base station obtains the cell wireless network temporary identifier of the user by receiving the context information of the user equipment forwarded by the macro base station.
  • the present invention is directed to a scenario in which a macro base station network and a micro base station network are covered by the same, and the access control is uniformly performed by the macro base station. And the temporary identifier of the cell radio network is allocated, which can greatly accelerate the access process and the subsequent handover process, effectively reduce the probability of dropped calls of the fast mobile users, and improve the efficiency of the base station and the utilization of the radio resources.
  • Figure la is a schematic diagram of a multi-layer heterogeneous network architecture in which a macro base station and a micro base station coexist in a hot spot;
  • FIG. 1b is a flowchart of a method for accessing a base station according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for accessing a base station according to an embodiment of the present invention
  • FIG. 3a is a schematic diagram of a scenario provided by an embodiment of the present invention.
  • FIG. 3b is a schematic diagram of another scenario provided by an embodiment of the present invention.
  • FIG. 3c is a schematic diagram of still another scenario according to an embodiment of the present disclosure.
  • FIG. 4 is a flowchart of a method for accessing a base station for the scenario of FIG. 3a according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a method for accessing a base station for the scenario of FIG. 3b according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a method for accessing a base station according to the scenario of FIG. 3c according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of still another scenario provided by an embodiment of the present invention.
  • FIG. 8 is a flowchart of a method for accessing a base station for the scenario of FIG. 7 according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of still another scenario according to an embodiment of the present invention.
  • FIG. 10 is a flowchart of a method for accessing a base station according to the scenario of FIG. 9 according to an embodiment of the present invention
  • FIG. 11 is a flowchart of a method for accessing a base station according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 13 is another schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. detailed description
  • the basic knowledge of the present invention is first introduced briefly: It is different from the IMSI (International Mobi le subscriber identity) / TMSI (Temporary mobi le) which identifies the user in the core network. Subscriber identity, the use of 16 bits in the wireless network to identify the RRC connection and uniquely identify a mobile subscriber in the transmission. These identifiers mainly include:
  • Temporary C-RNTI The random access process is allocated by the serving base station to identify different users, and the user is collecting Upgrading the Temporary C-RNTI to C-RNTI after the collision resolution success feedback returned by the base station;
  • C-RNTI Cell-Radio Network Temporary Identity
  • the base station upgrades the Temporary C-RNTI to C_RNTI.
  • the user does not perform base station handover in the cell covered by the source base station during the call, and keeps the C-RNTI value unchanged; if the user moves to the cell covered by another base station, the destination base station re-allocates a new one for the user.
  • C-RNTI logo After the user ends the call, release the C-RNTI identifier;
  • C-RNTI Semi-persistent Scheduling C-RNTI: The usage is the same as C-RNTI, except that it is only used when using the semi-persistent scheduling method.
  • Example 1 Semi-persistent Scheduling C-RNTI
  • the embodiment of the present invention provides a method for accessing a base station. Referring to FIG. 1b, the method includes:
  • the current macro base station establishes a control plane connection with the user equipment according to the access request of the user equipment, and allocates a first cell wireless network temporary identifier to the user equipment;
  • the context information includes a first cell wireless network temporary identifier allocated to the user equipment;
  • the method further includes:
  • the current macro base station establishes a data plane connection with the user equipment.
  • the area where the user equipment is located is not covered by the micro base station, and only the macro base station is in the area where the user equipment is located, and the micro base station is not selected by the user equipment. There are no micro base stations available for the current user equipment.
  • the present invention is directed to the scenario in which the macro base station network and the micro base station network are in the same coverage.
  • the macro base station uniformly performs access control and allocates the temporary identifier of the cell radio network, which can greatly accelerate the access process and the subsequent handover process, thereby effectively reducing the fast mobile user.
  • the probability of dropped calls improves the efficiency of the base station and the utilization of radio resources.
  • the embodiment of the present invention provides a method for accessing the base station.
  • the base station to be accessed by the user initially is covered by the macro base station network and the micro base station network. Therefore, when the user accesses the base station, a control plane and a data plane connection are established respectively with the macro base station and the micro base station.
  • the method includes: 201:
  • the UE User Equipment
  • the system information broadcast by the base station includes: a bandwidth, a frame sequence number, and the like, where the system information is specifically used for the user connection. This part is similar to the existing process in the process of selecting the channel and the subsequent communication, and will not be described here.
  • the UE identifies the base station and sends an access request to the macro base station A according to the identification result.
  • the NID (2) takes an integer value between 0 and 2, indicating the physical layer base station identifier in the physical layer base station identification group.
  • the macro base station and the micro base station can be respectively represented by selecting different NID (1) and NID (2) values.
  • NID (1) 1 indicates a macro base station
  • the remaining NID (1) values indicate a micro base station
  • NID (2) 0 indicates a macro base station
  • the remaining NID (2) values indicate a micro base station.
  • the user obtains time-frequency synchronization in the base station search, and simultaneously obtains the NID (1) and NID (2) values and thereby determines the base station class. After identifying the class of the base station, the UE initiates an access request to the macro base station therein.
  • the macro base station A After receiving the access request, the macro base station A establishes a control plane connection with the UE and allocates a cell radio network temporary identifier C-RNTI to the UE;
  • the macro base station A establishes a control plane connection with the UE according to the access request of the user equipment, and allocates a first cell radio network temporary identifier to the UE.
  • the first cell radio network temporary identifier is specifically The cell wireless network temporary identifier C-RNT I.
  • step 202-step 203 is a process in which the UE first identifies the type of the base station, and initiates an access request to the macro base station according to the identification result.
  • the process may also be replaced by: When the UE accesses a cell that is jointly covered by the macro base station network and the micro base station network, the RSRP (Reference Signal Receiving Power) or RSRQ (Reference Signal Receiving Power) or RSRQ (Reference Signal Receiving Power) measured by the UE according to the cell access control policy
  • the base station with a high value of the reference signal reception quality initiates an access request; if the macro base station RSRP/RSRQ value is high, the macro base station allocates the C-RNTI identifier and establishes a control plane connection; if the micro base station RSRP/RSRQ value is high, the micro base station
  • the access request is rejected/not responded (ie, rejected or not responded), and the UE re-initiates the access request to the base
  • the micro base station accepts and processes the access request initiated by the UE.
  • the micro base station rejects/does not respond to the access request, so that when the UE enters the network, it first establishes control with the macro base station.
  • the contact of the face, and the macro base station allocates a cell radio network temporary identifier C_RNTI to the UE.
  • the macro base station A establishes a control plane connection to the MME (Mobility Mangment Entity, mobile management unit);
  • control plane connection of the macro base stations A to ⁇ E can be established after the user legality and QoS authentication are completed.
  • the UE reports the detected signal quality of the micro base station and the micro base station to the macro base station A that establishes the control plane connection.
  • the macro base station A After receiving the report of the UE, the macro base station A selects the accessed micro base station B for the UE.
  • the consideration factors for selecting the accessed micro base station for the UE include the base station load, the user service, or the moving speed of the user.
  • the macro base station A sends a notification to the UE to access the micro base station B.
  • the UE After receiving the notification sent by the macro base station A, the UE accesses the micro base station B and establishes a data plane connection with the micro base station B.
  • the macro base station A forwards the context information of the user equipment to the micro base station B, where the context information includes a cell radio network temporary identifier C-RNTI allocated to the user;
  • step 203 to step 209 are the network access process of the user in the same coverage scenario as the macro base station and the micro base station, and then the UE and the micro base station B use the cell radio network temporary identifier C-RNTI obtained in step 209.
  • the UE is uniquely identified in the row schedule.
  • the user can selectively access the base station according to its own speed.
  • the speed of the user equipment exceeds a preset threshold, that is, when the user equipment is a high-speed user equipment, the high-speed user equipment can be associated with the Acer.
  • the station establishes a connection between the data plane and the control plane, and the speed of the user equipment is changed. Once the speed of the high speed user equipment falls below a preset threshold, the macro base station can control the user according to the measurement report reported by the high speed user equipment.
  • the device connects the data plane to the designated micro base station.
  • the control information of the macro base station can be received, so as to maintain the connection with the macro base station, so that the macro base station can indicate it, and once the Idle user starts to be active, the macro base station is first established.
  • the control plane is connected, and the macro base station instructs it to establish a data plane connection with the designated micro base station or the macro base station for further communication.
  • Steps 205-209 When receiving the micro base station measurement report reported by the user equipment, selecting a micro base station for the user equipment according to a preset policy, so that the user equipment establishes a data plane connection with the micro base station, and the user equipment is connected
  • the context information is notified to the micro base station, and the context information of the user equipment includes a first cell radio network temporary identifier allocated to the user equipment.
  • the UE After the step 209, the UE has established a control plane connection with the macro base station A, and establishes a data plane connection with the micro base station B.
  • the current macro base station A determines whether to proceed according to the measurement report reported by the user equipment. Base station handover, if yes, according to the type of the source base station and the destination base station, instructing the user equipment to switch the data plane connection or the control plane connection to the destination base station;
  • both the source base station and the destination base station are micro base stations covered by the current macro base station, that is, the UE moves from one micro base station in the same macro base station range to another micro base station, this case refers to a
  • the macro base station covers multiple micro base stations, and the UE moves from one micro base station it covers to another;
  • the current macro base station reserves the foregoing control plane connection, and sends a first handover instruction to the UE, where the first handover instruction is used to instruct the UE to switch the data plane connection between the UE and the source base station to the target base station;
  • the source base station is the micro base station covered by the current macro base station and the target base station is the current macro base station, that is, the UE moves from the micro base station in the same macro base station range to the macro base station;
  • the macro base station covers at least one micro base station, and the UE moves from within the micro base station to outside the micro base station, but is still in the range of the macro base station;
  • the current macro base station maintains the control plane connection, and sends a first handover instruction to the UE, where the first handover instruction is used to instruct the UE to switch the data plane connection between the UE and the source base station to the target base station;
  • FIG. 4 is a flow chart of an access base station when a UE moves from one micro base station in the same macro base station to another micro base station.
  • the UE For example, the method of the present embodiment is as follows:
  • the UE reports the measurement report to the macro base station A covering the micro base stations B and C periodically or through event triggering. Because the user equipment moves, it needs to continuously send measurement reports to the base station serving it, for example, in LTE (Long In the system of the term evolution, the user equipment needs to send an A2 event measurement report.
  • the A2 event measurement report mainly includes RSRP or RSRQ.
  • the base station determines whether the user equipment needs to be switched according to the information.
  • step 401 is a process in which the UE detects the signal quality of the serving base station and the neighboring base station and reports the channel status to the currently served macro base station.
  • the macro base station A receives the measurement report, and when determining, according to the measurement report, that the UE needs to switch the base station, selecting the micro base station C for the user;
  • the macro base station A selects a target base station according to the preset policy and the access control policy, and the base station sends the base station according to the measurement report reported by the user equipment.
  • the specific process of determining whether the user equipment needs to be switched is the same as that of the prior art, and details are not described herein again.
  • the macro base station A has resource usage and user information of each micro base station in the macro base station range, and the macro base station performs selection of the target base station and completes access control.
  • the difference between this step and the prior art is that the signaling of the handover request sent by the source base station to the target base station is omitted, and the destination base station is also omitted from sending the handover request acknowledgement signaling to the source base station, thereby saving.
  • the time of the switch is that the signaling of the handover request sent by the source base station to the target base station is omitted, and the destination base station is also omitted from sending the handover request acknowledgement signaling to the source base station, thereby saving. The time of the switch.
  • the macro base station A has resource usage and user information of each micro base station in the range of the macro base station, that is, the macro base station A has resource usage and user information of each micro base station in the range of the macro base station and the macro base station.
  • the macro base station A notifies the source base station (ie, the micro base station B) to forward the current transmission state and the cache data packet that has not been sent to the destination base station (ie, the micro base station C);
  • the macro base station A notifies the UE to perform base station handover, and gp, the macro base station A sends a first handover instruction to the UE.
  • the source base station After receiving the forwarding notification from the macro base station A, the source base station forwards the current transmission state and the cached data packet that has not been sent to the destination base station.
  • the UE when the UE moves within the same macro base station, the UE maintains a connection with the control plane of the macro base station.
  • the control plane of the macro base station When the handover of the micro base station is required, only the data plane is switched to the target base station.
  • the UE After receiving the notification of performing base station handover and performing base station handover, the UE notifies the macro base station A that the base station has completed handover;
  • the macro base station A After receiving the notification from the UE, the macro base station A sends the context information of the user equipment to the target base station, where the context information of the user equipment includes a first cell radio network temporary identifier C-RNTI allocated to the UE;
  • the macro base station in step 408, notifies the target base station of the cell radio network temporary identifier C-RNTI used by the UE, and does not need to be re-allocated by the target base station and sent to the user for updating by the source base station.
  • the efficiency of the base station is greatly improved, the amount of signaling information exchanged in the communication is reduced, and air interface resources are saved.
  • the target base station performs data plane switching with the core network.
  • Step 401 - Step 409 is a process of base station handover, and the process may further include:
  • the macro base station A notifies the source base station to release the context information of the UE.
  • the source base station releases the context information of the UE.
  • the control plane connection is reserved, and the first handover instruction is sent to the user equipment (ie, when the handover is notified in step 404)
  • the first switching instruction is used to instruct the user equipment to switch the data plane connection between the user equipment and the source base station to the destination base station.
  • the method further includes: notifying the first cell wireless network temporary identifier of the user equipment to the destination base station.
  • FIG. 5 is a flow chart of the access base station when the UE moves from a micro base station in the range of the macro base station to the macro base station.
  • the UE For example, moving from a micro base station in the range of a macro base station to a macro base station, the technical solution of this embodiment is described in detail.
  • the method in this embodiment includes:
  • the UE After the UE enters an area other than the micro base station B from the area of the micro base station B in the range of the macro base station A, the UE reports the measurement report to the macro base station A.
  • the macro base station A receives the measurement report, and when determining, according to the measurement report, that the UE needs to switch the base station, select the macro base station A for the UE;
  • the UE enters the area of the macro base station A that does not cover the micro base station B, and the macro base station A selects the target base station according to the access control policy, and the base station determines, according to the measurement report sent by the user equipment, whether the user equipment needs to be switched.
  • the specific process is the same as the prior art, and details are not described herein again.
  • the macro base station A has resource usage and user information of each micro base station in the macro base station range, and the macro base station performs selection of the target base station and completes access control. This step omits the signaling that the source base station sends the handover request to the destination base station, and also omits the destination base station to send the handover request acknowledgement signaling to the source base station, which saves the handover time.
  • the macro base station A has resource usage and user information of each micro base station in the range of the macro base station, that is, the macro base station A has resource usage and user information of each micro base station in the range of the macro base station and the macro base station.
  • the macro base station A notifies the source base station (ie, the micro base station B) to forward the current transmission state and the cache data packet that has not been sent to the destination base station (ie, the macro base station A);
  • the macro base station A notifies the UE to perform base station handover, and gp, the macro base station A sends a first handover instruction to the UE.
  • the micro base station B After receiving the forwarding notification from the macro base station A, the micro base station B forwards the current transmission status and the cache data packet that has not been sent to the macro base station A;
  • the UE when the UE moves within the same macro base station, the UE maintains a connection with the control plane of the macro base station.
  • the control plane of the macro base station When the handover of the base station is required, only the data plane is switched to the target base station.
  • the UE After receiving the notification of the base station handover and performing the base station handover, the UE notifies the macro base station A that the base station has completed the handover;
  • the target base station performs data plane switching with the core network.
  • the macro base station A After receiving the notification from the UE, the macro base station A notifies the source base station to release the context information of the UE.
  • the processing information for the context information and the synchronization has also been omitted.
  • the source base station After receiving the notification of releasing the UE context information, the source base station releases the context information of the UE.
  • the control plane connection is reserved, and the first handover instruction is sent to the user equipment (ie, in step 504)
  • the first switching instruction is used to instruct the user equipment to switch the data plane connection between the user equipment and the source base station to the destination base station.
  • FIG. 6 is a flowchart of the access base station when the UE moves from the area where the macro base station does not cover the micro base station to the micro base station.
  • the UE for example, the method for moving the micro-base station in the macro base station to the micro-base station is used as an example. The technical solution of this embodiment is described in detail. The method in this embodiment includes:
  • the UE enters the area of the micro base station B from an area other than the micro base station B in the range of the macro base station A, and then goes to the macro base station A. Report measurement report;
  • the macro base station A receives the measurement report, and when determining, according to the measurement report, that the UE needs to switch the base station, selecting the micro base station B for the UE;
  • the UE enters the area of the micro base station B in the macro base station A, and the macro base station A selects the destination base station according to the access control policy, and the base station determines, according to the measurement report sent by the user equipment, whether the user equipment needs to be switched.
  • the macro base station A has resource usage and user information of each micro base station in the macro base station range, and the macro base station performs selection of the target base station and completes access control. This step omits the signaling of the handover request sent by the source base station to the destination base station, and also omits the destination base station transmitting the handover request acknowledgement signaling to the source shelf station, which saves the handover time.
  • the macro base station A has resource usage and user information of each micro base station in the range of the macro base station, that is, the macro base station A has resource usage and user information of each micro base station in the range of the macro base station and the macro base station.
  • the macro base station A forwards the current transmission status and the buffer data packet that has not been sent to the destination base station (ie, the micro base station B).
  • the macro base station A notifies the UE to perform the base station handover, and gp, the macro base station A sends the first handover instruction to the UE.
  • the UE and the target base station (the micro base station B) perform data plane synchronization on the data plane;
  • the UE After receiving the notification of the base station handover and performing the base station handover, the UE notifies the macro base station A that the base station has completed the handover;
  • the macro base station A After receiving the notification from the UE, the macro base station A sends the context information of the user equipment to the target base station (the micro base station B), where the context information of the user equipment includes the first cell radio network temporary identifier C- allocated to the UE. RNTI ;
  • the steps 601-607 are different from the steps 501-509 in that the macro base station A needs to send the context information of the user equipment including the C-RNTI to the micro base station B, so as to be used for subsequent control of the call, and because the source base station is controlled.
  • the macro base station is entered, so there is no need to perform the release step.
  • the control plane connection is reserved, and the first handover instruction is sent to the user equipment (ie, in step 604)
  • the first switching instruction is used to instruct the user equipment to switch the data plane connection between the user equipment and the source base station to the destination base station; optionally, the method further includes: the user equipment The first cell radio network temporary identifier is notified to the target base station.
  • the first cell radio network temporary identifier of the user equipment is notified to the target base station; when the source base station is the The current macro base station, when the target base station is the micro base station covered by the current macro base station, notifies the target base station of the first cell radio network temporary identifier of the user equipment.
  • the handover request signaling interaction between the source micro base station and the destination micro base station is omitted, and the macro base station uniformly performs access control and directly sends a handover command to the user, which can greatly accelerate the handover process, and effectively reduce the probability of dropped calls of fast mobile users. , improve the efficiency of the base station and the utilization of wireless resources.
  • the cell wireless network temporary identifier is reserved.
  • the C-RNTI can simplify the function of the micro base station, and can save the backbone network and radio resource overhead without sending the information to the user through the air interface of the source micro base station.
  • the target base station is the second macro base station
  • the micro base station that establishes the data plane connection with the UE crosses the current macro base station and the second macro base station
  • the current macro base station reserves the micro base station and The data plane of the UE is connected, and sends a second handover instruction to the UE, where the second handover instruction is used to instruct the UE to switch the control plane connection from the current macro base station to the second macro base station.
  • the specific process is:
  • the control plane of the user equipment is switched from the first macro base station A where the source base station B is located to the destination.
  • the second macro base station D where the base station is located; still taking FIG. 7 as an example.
  • the control plane of the user equipment is from the first macro base station. A switches to the second macro base station D.
  • the method in this embodiment includes:
  • the UE reports the measurement report to the currently serving macro base station A (ie, the source base station) periodically or by using an event trigger.
  • the macro base station A receives the measurement report, and selects the user when the UE needs to switch the base station according to the measurement report.
  • Macro base station D ie, destination base station;
  • the macro base station A sends a handover request to the macro base station D, where the handover request carries a cell radio network temporary identifier (C-RNTI)-S allocated by the source base station, where the suffix S represents that the cell radio network temporary identifier is allocated by the source base station. ;
  • C-RNTI cell radio network temporary identifier
  • the macro base station D After receiving the handover request, the macro base station D performs network entry and assigns a (C-RNTI)-T identifier to the user, and the suffix T represents a cell radio network temporary identifier (C-RNTI)-T re-allocated by the target base station;
  • the original access control on the destination base station side can be simplified here into network entry, that is, only the control link transmission resource allocation needs to be performed.
  • the macro base station D sends an acknowledgement handover message to the macro base station A, where the message carries the (C-RNTI)-T identifier allocated by the macro base station D to the user;
  • the macro base station A notifies the UE to perform base station handover, that is, the macro base station A sends a second handover instruction to the UE.
  • the handover command carries a (C-RNTI)-T identifier assigned by the macro base station D to the user;
  • the destination base station reassigns the user (C-RNTI)-T identity and performs cell wireless network temporary identity update to the user through the source base station (macro base station A).
  • the UE After receiving the base station handover notification, the UE performs synchronization on the control plane with the macro base station D.
  • the UE After receiving the notification of the base station handover and performing the base station handover, the UE notifies the macro base station D that the base station has completed the handover;
  • the macro base station D After the UE establishes a control plane connection with the macro base station D, the macro base station D notifies the micro base station B to update the cell wireless network of the UE.
  • the temporary identifier is (C-RNTI) _T;
  • the (C-RNTI)-T notified by the macro base station D is the second cell radio network temporary identifier described in the embodiment of the present invention, and those skilled in the art may know that the next data scheduling is performed.
  • the second cell radio network temporary identifier (C-RNTI) - T is used to uniquely identify the user equipment.
  • the macro base station D notifies the macro base station A to release the context information of the UE.
  • the context information includes a first cell wireless network temporary identifier.
  • the macro base station A releases the context information of the UE.
  • the source base station is the current macro base station
  • the target base station is the second macro base station
  • the micro base station that establishes a data plane connection with the user equipment crosses the current macro base station and the second macro base station
  • the micro base station is connected to the data plane of the user equipment, and sends a second handover instruction to the user equipment (ie, an instruction used to notify the handover in step 806), where the second handover instruction is used to instruct the user equipment to control the control plane.
  • the connection is handed over from the current macro base station to the second macro base station.
  • the method further includes: informing the other macro base station to release context information about the user equipment, the context information including the first cell radio network temporary identifier.
  • the current macro base station when the source base station is the micro base station covered by the current macro base station and the target base station is the micro base station covered by the third macro base station, the current macro base station sends a third handover instruction to the UE, and the third handover instruction is used to indicate The UE switches the data plane connection of the UE from the source base station to the destination base station, and switches the control plane connection from the current macro base station to the third macro base station.
  • the specific process is:
  • the method in this embodiment includes:
  • the UE reports a measurement report to the macro base station A that covers the micro base station B.
  • the macro base station A receives the measurement report, and when determining, according to the measurement report, that the UE needs to switch the base station, selecting the macro base station D for the user equipment;
  • the macro base station A sends a handover request to the macro base station D, where the handover request carries a cell radio network temporary identifier (C-RNTI)-S allocated by the source base station, where the suffix S represents that the cell radio network temporary identifier is allocated by the source base station.
  • C-RNTI cell radio network temporary identifier
  • the macro base station D receives the handover request, performs network entry, allocates a (C-RNTI)-T identifier to the user, and selects the micro base station C for the UE according to the access control policy;
  • the macro base station D sends an acknowledgement handover message to the macro base station A, where the message carries the (C-RNTI)-T identifier allocated by the macro base station D to the user;
  • the macro base station A notifies the micro base station B to forward the current transmission status and the cache data packet that has not been sent to the micro base station C;
  • the macro base station A notifies the UE to perform the base station handover, and the macro base station A sends a third handover instruction to the UE, where the handover command carries the (C-RNTI)-T identifier assigned by the macro base station D to the user;
  • the micro base station B After receiving the forwarding notification from the macro base station A, the micro base station B forwards the current transmission status and the cached data packet that has not been sent to the micro base station C;
  • the UE After receiving the notification of performing base station handover and performing base station handover (that is, switching the control plane connection from the macro base station A to the macro base station D, and switching the data plane connection from the micro base station B to the micro base station C), the UE notifies the macro base station. D base station handover is completed;
  • the macro base station D After receiving the notification from the UE, the macro base station D sends the context information of the user equipment to the micro base station C, where the context information of the user equipment includes a cell radio network temporary identifier (C-RNTI)-T;
  • C-RNTI cell radio network temporary identifier
  • the micro base station C performs data plane switching with the core network.
  • the macro base station D notifies the macro base station A to release the context information of the UE;
  • the macro base station A notifies the micro base station B to release the context information of the UE.
  • the micro base station B releases the context information of the UE.
  • the macro base station A releases the context information of the UE.
  • the data plane of the user equipment is switched from the source base station to the destination base station, and the user is
  • the control plane of the device is switched from a macro base station covering the source base station to a macro base station covering the target base station, and includes a data plane switching between the micro base stations and a control plane switching between the macro base stations, and the destination base station (ie, the destination base station)
  • the station allocates a new C-RNTI to the user, and notifies the UE of the update, and uniquely identifies the UE in the uplink and downlink scheduling according to the new C-RNTI.
  • a third handover instruction is sent to the user equipment, where the third handover instruction is used. Instructing the user equipment to switch the data plane connection of the user equipment from the source base station to the destination base station, and to switch the control plane connection from the current macro base station to the third macro base station.
  • the method further includes: notifying the current macro base station to release context information about the user equipment, where the context information includes the first cell radio network temporary identifier.
  • the user control plane is connected to the MME through the macro base station
  • the user data plane is connected to the S-GW through the micro base station
  • the two functional entities of the S-GW and the ⁇ E may be located in the same physical entity or through High-speed links are directly connected or have logical connections through the backbone network.
  • the present invention is directed to the scenario in which the macro base station network and the micro base station network are in the same coverage.
  • the macro base station uniformly performs access control and allocates the temporary identifier of the cell radio network, which can greatly accelerate the access process and the subsequent handover process, thereby effectively reducing the fast mobile user.
  • the probability of dropped calls improves the efficiency of the base station and the utilization of radio resources.
  • the data plane or the control plane of the user equipment is switched to the target base station; and when the target base station is the micro base station in the coverage of the current macro base station and the source base station, The cell radio network temporary identifier of the target base station user equipment is notified to reserve the cell radio network temporary identifier C-RNTI, which can simplify the function of the micro base station, and does not need to send the information to the user equipment by the source base station, which can save the backbone network and the wireless network. Resource overhead.
  • micro base station And part of the control functions of the user within the coverage of the micro base station, such as user management and mobility management functions, are moved from the micro base station to the macro base station for centralized processing, omitting the handover request signaling between the source micro base station and the destination micro base station. Interaction.
  • the embodiment of the present invention provides a method for accessing the base station. Referring to FIG. 11, the method includes:
  • 1101 Establish a control plane connection with the macro base station, and receive a temporary identifier of the cell wireless network allocated by the macro base station;
  • 1102 Reporting the monitored micro base station measurement report, and accessing the micro base station selected by the macro base station according to the micro base station measurement report, and establishing a data plane connection with the micro base station selected by the macro base station, where the micro base station forwards by receiving the macro base station Context information of the user equipment to know the user's cell wireless network temporary identity.
  • the method may further include:
  • the method can also include:
  • 1104 Report a measurement report to the macro base station, so that the macro base station determines, according to the measurement report, whether to perform base station handover.
  • the data plane connection or the control plane connection is switched to the target base station according to the indication of the macro base station.
  • step 1105 the data plane connection or the control plane connection is switched to the destination base station according to the indication of the macro base station, which specifically includes:
  • the data plane connection is switched from the source base station to the destination base station, and the control plane connection is switched to the macro base station covering the target base station.
  • the access control is uniformly performed by the macro base station and the temporary identifier of the cell radio network is allocated, which can greatly accelerate the access process and the subsequent handover process, thereby effectively reducing the fast mobile users.
  • the probability of speech improves the efficiency of the base station and the utilization of radio resources.
  • the embodiment of the present invention provides a base station.
  • the base station to be accessed by the user at the initial time is covered by the macro base station network and the micro base station network, and thus is in the user.
  • the control plane and the data plane are respectively connected to the macro base station and the micro base station.
  • the base station includes: a control plane connection establishing module 1201, configured to establish with the user equipment according to the access request of the user equipment.
  • the control plane is connected, and the first cell wireless network temporary identifier is allocated to the user equipment;
  • the first identifier maintenance module 1202 is configured to: when receiving the micro base station measurement report reported by the user equipment, select a micro base station for the user equipment according to a preset policy, so that the user equipment establishes a data plane connection with the micro base station, and The context information of the user equipment is notified to the micro base station, and the context information includes a first cell radio network temporary identifier allocated to the user equipment.
  • the base station further includes:
  • the data plane establishing module 1203 is configured to establish a data plane connection with the user equipment when the area where the user equipment is located does not have a micro base station coverage or does not select a micro base station for the user equipment.
  • the base station also includes:
  • the switching module 1204 is configured to determine, according to the measurement report reported by the user equipment, whether to perform base station handover, and if yes, instruct the user equipment to switch the data plane connection or the control plane connection to the destination base station according to the type of the source base station and the destination base station. ;
  • the switching module 1204 includes:
  • the first switching unit 1204a is configured to: when the source base station and the destination base station are both micro base stations covered by the current macro base station, retain the control plane connection, and send a first switching instruction to the user equipment, the first switching The instruction is used to indicate that the user equipment switches the data plane connection between the user equipment and the source base station to the destination base station;
  • the second switching unit 1204b is configured to: when the source base station is the micro base station covered by the current macro base station, and the target base station is the current macro base station, retain the control plane connection, and send a first switching instruction to the user equipment, where First switching instruction The user equipment is used to switch the data plane connection between the user equipment and the source base station to the destination base station; the third handover unit 1204c is configured to: when the source base station is the current macro base station, the destination base station is the current macro base station And the first switching instruction is used to instruct the user equipment to switch the data plane connection between the user equipment and the source base station to the destination.
  • Base station is configured to: when the source base station is the micro base station covered by the current macro base station, and the target base station is the current macro base station, retain the control plane connection, and send a first switching instruction to the user equipment, where First switching instruction The user equipment is used to switch the data plane connection between the user equipment and the source base station to the destination base station; the third handover unit 1204c is configured to: when the
  • the fourth switching unit 1204d is configured to: when the source base station is the current macro base station, the target base station is a second macro base station, and the micro base station that establishes a data plane connection with the user equipment crosses the current macro base station and the second macro base station Retaining, the micro base station is connected to the data plane of the user equipment, and sends a second handover instruction to the user equipment, where the second handover instruction is used to instruct the user equipment to switch the control plane connection from the current macro base station to the Second macro base station.
  • the fifth switching unit 1204e is configured to: when the source base station is a micro base station that is covered by the current macro base station, where the target base station is a micro base station that is covered by the third macro base station, the current macro base station sends a third switching instruction to the user equipment, The third switching instruction is used to instruct the user equipment to switch the data plane connection of the user equipment from the source base station to the destination base station, and switch the control plane connection from the current macro base station to the third macro base station.
  • the base station also includes:
  • the second identifier maintenance module 1205 is configured to: when the target base station is a micro base station in the coverage of the current macro base station, notify the target base station of the first cell radio network temporary identifier of the user equipment.
  • the third identifier maintenance module 1206 is configured to allocate a second cell radio network temporary identifier to the user equipment when receiving the handover base station request from the other macro base station, and notify the other macro base of the second cell radio network temporary identifier. And the station, so that the other macro base station updates the first cell radio network temporary identifier of the user equipment, and the handover base station requests to carry the first cell radio network temporary identifier allocated by the other base station to the user equipment.
  • the third identity maintenance module 1206 is further configured to notify the other macro base station to release context information about the user equipment, where the context information includes the first cell wireless network temporary identifier.
  • the base station provided by this embodiment may be a macro base station, which is the same as the method embodiment.
  • the base station may be a macro base station, which is the same as the method embodiment.
  • an embodiment of the present invention further provides a user equipment, including:
  • the first connection establishing module 1401 is configured to establish a control plane connection with the macro base station, and receive a temporary identifier of the cell wireless network allocated by the macro base station;
  • the second connection establishing module 1402 is configured to report the monitored micro base station measurement report, and access the micro base station selected by the macro base station according to the micro base station measurement report, and establish a data plane connection with the micro base station selected by the macro base station, where the micro connection is established.
  • the base station obtains the cell wireless network temporary identifier of the user by receiving the context information of the user equipment forwarded by the macro base station.
  • the second connection establishing module 1402 is further configured to establish a data plane connection with the macro base station when there is no micro base station coverage in the area or the macro base station does not select the micro base station.
  • the user equipment also includes:
  • the reporting module 1403 is configured to report the measurement report to the macro base station, so that the macro base station determines whether to perform base station handover according to the measurement report.
  • the user switching module 1404 is configured to switch the data plane connection or the control plane connection to the target base station according to the indication of the macro base station when the handover needs to be performed.
  • the user switching module 1404 includes:
  • a first user switching unit configured to: when receiving the first switching instruction of the macro base station, retain the control plane connection, and switch the data plane connection to the destination base station;
  • a second user switching unit configured to: when receiving the second switching instruction of the macro base station, retain the data plane connection, and switch the control plane connection to the destination base station;
  • a third user switching unit configured to: when receiving the third handover instruction of the macro base station, switch the data plane connection from the source base station to the target base station, and switch the control plane connection to an asteroid base covering the target base station station.
  • the user equipment provided in this embodiment may be a mobile phone, a PDA, a notebook computer, etc., and the method is the same as the method embodiment. For details, refer to the method embodiment, and details are not described herein.
  • the present invention is directed to the scenario in which the macro base station network and the micro base station network are in the same coverage.
  • the macro base station uniformly performs access control and allocates the temporary identifier of the cell radio network, which can greatly accelerate the access process and the subsequent handover process, thereby effectively reducing the fast mobile user.
  • the probability of dropped calls improves the efficiency of the base station and the utilization of radio resources.
  • the data plane or the control plane of the user equipment is switched to the target base station; and when the target base station is the micro base station in the coverage of the current macro base station and the source base station, The cell radio network temporary identifier of the target base station user equipment is notified to reserve the cell radio network temporary identifier C-RNTI, which can simplify the function of the micro base station, and does not need to send the information to the user equipment by the source base station, which can save the backbone network and the wireless network. Resource overhead.
  • Embodiments of the invention may be implemented in software, and the corresponding software program may be stored in a readable storage medium, such as a hard disk, a cache, or an optical disk of a computer.
  • a readable storage medium such as a hard disk, a cache, or an optical disk of a computer.

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Description

接入基站方法、 基站和用户设备 技术领域
本发明涉及通信技术领域， 特别涉及一种接入基站方法、 基站和用户设备。 背景技术 说
在第二代通信系统中， 用户的信息交流需求主要是语音通话和短消息， 这对频谱效率 的要求不高， 系统主要受制于覆盖区域的大小， 因此普遍采用宏基站的组网方式， 基站间 距普遍较大， 这种组网方式的成本较低。 但随着第三、 四代通信系统的发展， 数据传输成 为新的需求， 尤其是实时视频的传输， 对频谱效率和书网络吞吐量的要求大幅度增加， 但由 于宏基站的覆盖范围大容纳用户多， 使得宏基站的吞吐量受到很大的限制。 当宏基站覆盖 有一个或多个人口密集区域时， 对宏网络的吞吐量需求进一步增加， 此时使用单层宏基站 覆盖只能满足用户基本的语音业务需求， 而不能满足高速数据传输需求。 可见现有的宏基 站组网方式不能满足用户对高速数据传输的需求。
针对宏基站的上述缺点， 现有技术中的解决方案采用了宏基站和微基站在热点共存的 多层异构网络架构（参见图 la)， 由宏基站提供大范围连续的广覆盖， 由微基站提供热点区 域覆盖。 用户在只有宏基站网络的区域接入宏基站， 在有宏基站网络和微基站网络同覆盖 的区域优先选择接入微基站以分流宏基站网络的流量， 得到更好的服务。 宏基站和微基站 是两个独立的网络， 当用户选择接入一个基站后， 基站同时与该用户建立控制面和数据面 连接， 为用户提供空口无线传输， 基站为该用户分配并维护一个在该基站下唯一的小区无 线网络临时标识 C-RNTI (Cell-Radio Network Temporary Identity, 小区无线网络临时标 识） 用于识别 RRC (Radio Resource Control , 无线资源控制） 连接和在调度中唯一识别该 用户。 当用户在基站间切换时， 由源基站将 C-RNTI标识等用户设备的上下文信息通过骨干 网发送到目的基站， 目的基站为用户分配新的 C-RNTI标识， 并通过源基站由空口通知用户 更新， 同时源基站维护的 C-RNTI标识在基站切换成功后释放。
在对现有技术进行分析后， 发明人发现现有技术至少具有如下缺点：
在多层异构网络架构下， 由于微基站覆盖面积小， 在用户设备在移动中时， 每接入一 微基站， 都需要由该微基站为用户设备分配新的小区无线网络临时标识 C-RNTI并经由无线 传输通知用户更新， 这不仅降低了基站效率， 同时增加了骨干网及无线网络的信息传输， 降低无线资源利用率。 发明内容
本发明实施例提供了一种接入基站方法、 基站和用户设备。 所述技术方案如下： 一种接入基站的方法， 所述方法包括：
当前宏基站根据用户设备的接入请求与所述用户设备建立控制面连接， 并为所述用户 设备分配第一小区无线网络临时标识；
当接收到所述用户设备上报的微基站测量报告时， 根据预设策略为所述用户设备选择 微基站， 使得所述用户设备与所述微基站建立数据面连接， 并将所述用户设备的上下文信 息通知给所述微基站， 所述上下文信息包括为所述用户设备分配的第一小区无线网络临时 标识。
一种接入基站方法， 所述方法包括：
与宏基站建立控制面连接， 并接收所述宏基站分配的小区无线网络临时标识； 上报监测到的微基站测量报告， 并接入所述宏基站根据所述微基站测量报告选择的微 基站， 与所述宏基站选择的微基站建立数据面连接， 所述微基站通过接收所述宏基站转发 的用户设备的上下文信息以获知用户的小区无线网络临时标识。
一种基站包括：
控制面连接建立模块， 用于根据用户设备的接入请求与所述用户设备建立控制面连接， 并为所述用户设备分配第一小区无线网络临时标识；
第一标识维护模块， 用于当接收到所述用户设备上报的微基站测量报告时， 根据预设 策略为所述用户设备选择微基站， 使得所述用户设备与所述微基站建立数据面连接， 并将 所述用户设备的上下文信息通知给所述微基站， 所述上下文信息包括为所述用户设备分配 的第一小区无线网络临时标识。
一种用户设备， 所述方法包括：
第一连接建立模块， 用于与宏基站建立控制面连接， 并接收所述宏基站分配的小区无 线网络临时标识；
第二建立模块， 用于上报监测到的微基站测量报告， 并接入所述宏基站根据所述微基 站测量报告选择的微基站， 与所述宏基站选择的微基站建立数据面连接， 所述微基站通过 接收所述宏基站转发的用户设备的上下文信息以获知用户的小区无线网络临时标识。
本发明实施例提供的技术方案的有益效果是：
本发明针对宏基站网络和微基站网络同覆盖的场景， 通过由宏基站统一进行接入控制 并分配小区无线网络临时标识， 可以较大加速接入过程及后续的切换过程， 有效降低快速 移动用户的掉话概率， 提高了基站效率及无线资源的利用率。 附图说明
图 la是宏基站和微基站在热点共存的多层异构网络架构的示意图；
图 lb是本发明实施例提供的一种接入基站方法的方法流程图；
图 2是本发明实施例提供的一种接入基站方法的流程图；
图 3a是本发明实施例提供的一种场景的示意图；
图 3b是本发明实施例提供的另一种场景的示意图；
图 3c是本发明实施例提供的又一种场景的示意图；
图 4是本发明实施例提供的针对图 3a的场景的一种接入基站方法的流程图； 图 5是本发明实施例提供的针对图 3b的场景的一种接入基站方法的流程图； 图 6是本发明实施例提供的针对图 3c的场景的一种接入基站方法的流程图； 图 7是本发明实施例提供的又一种场景的示意图；
图 8是本发明实施例提供的针对图 7的场景的一种接入基站方法的流程图；
图 9是本发明实施例提供的又一种场景的示意图；
图 10是本发明实施例提供的针对图 9的场景的一种接入基站方法的流程图； 图 11是本发明实施例提供的一种接入基站的方法的流程图；
图 12是本发明实施例提供的一种基站的结构示意图；
图 13是本发明实施例提供的一种基站的另一结构示意图；
图 14是本发明实施例提供的一种用户设备的结构示意图。 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， 下面将结合附图对本发明实施方式作 进一步地详细描述。
在介绍本发明提供的接入基站方法之前， 首先对本发明的基础知识进行简要的介绍： 区别于核心网中标识用户的 IMSI ( International mobi le subscriber identity, 国 际移动用户标识） /TMSI ( Temporary mobi le subscriber identity, 临时移动用户标识）， 在无线网络中使用 16比特来标识 RRC连接和在传输中唯一识别一个移动用户， 这些标识主 要包括：
Temporary C-RNTI : 随机接入过程中由服务基站分配用于识别不同的用户， 用户在收 到基站返回的碰撞解决成功反馈后把 Temporary C-RNTI升级成 C-RNTI ;
C-RNTI (Cell-Radio Network Temporary Identity, 小区无线网络临时标识）： 如上 所述， 在随机接入后， 基站会把 Temporary C-RNTI升级为 C_RNTI。 用户在通话过程中只要 停留在源基站覆盖的小区内不作基站切换， 保持这个 C-RNTI值不变； 如果用户移动到别的 基站覆盖的小区内， 由目的基站为该用户重新分配一个新的 C-RNTI标识。 在用户结束通话 后， 释放 C-RNTI标识；
Semi-persistent Scheduling C-RNTI： 用法和 C-RNTI 相同， 只是它仅在使用 semi-persistent scheduling这禾中调度方式的时候才用。 实施例 1
为了提高基站效率， 提高无线资源利用率， 本发明实施例提供了一种接入基站方法， 参见图 lb， 该方法包括：
101： 当前宏基站根据用户设备的接入请求与该用户设备建立控制面连接， 并为该用户 设备分配第一小区无线网络临时标识；
102： 当接收到该用户设备上报的微基站测量报告时， 根据预设策略为该用户设备选择 微基站， 使得该用户设备与该微基站建立数据面连接， 并将该用户设备的上下文信息通知 给该微基站， 该上下文信息包括为该用户设备分配的第一小区无线网络临时标识；
在一个实施例中， 该方法还包括：
103， 当该用户设备所在区域没有微基站覆盖或未为该用户设备选择微基站时， 该当前 宏基站与该用户设备建立数据面连接。
其中， 所述用户设备所在区域没有微基站覆盖是指在该用户设备所在的区域中， 只有 宏基站覆盖； 而未为用户设备选择微基站是指经过宏基站判断， 用户设备上报的微基站中 没有适用于当前用户设备使用的微基站。
本发明针对宏基站网络和微基站网络同覆盖的场景， 通过由宏基站统一进行接入控制 并分配小区无线网络临时标识， 可以较大加速接入过程及后续的切换过程， 有效降低快速 移动用户的掉话概率， 提高了基站效率及无线资源的利用率。
实施例 2
为了提高基站效率， 提高无线资源利用率， 本发明实施例提供了一种接入基站方法， 在本发明实施例中， 用户初始时所要接入的基站由宏基站网络和微基站网络同覆盖， 因此 在用户接入基站时， 需分别与宏基站和微基站建立控制面和数据面连接， 参见图 2， 该方法 包括： 201： UE (User Equipment, 用户设备） 进入基站后， 接收到基站广播的系统信息； 在本发明实施例中， 基站广播的系统信息包括： 带宽、 帧序号等， 该系统信息具体用 于用户接入时选择信道和后续的通信过程中， 该部分与现有的过程类似， 在此不再赘述。
202： UE对基站进行识别并根据识别结果向宏基站 A发出接入请求；
该步骤 202中所述的 UE对基站进行识别还可以为： 通过物理层基站标识识别， 如在表 示物理层基站标识的公式 ^10∞11 = 3^10(1) + ^1^ 中， NID (l)取 0到 167之间的整数值， 表 示物理层基站标识组， NID (2)取 0到 2之间的整数值， 表示物理层基站标识组内的物理层 基站标识。此时可以通过选择不同的 NID (l)和 NID (2)值分别表示宏基站和微基站。如 NID (l) =1表示宏基站， 其余 NID (l)值表示微基站； 或 NID (2) =0表示宏基站， 其余 NID (2)值表示 微基站。 用户在基站搜索中获得时频同步， 同时获得 NID (l)和 NID (2)值并由此判断基站类 别。 当识别出基站的类别后， UE再向其中的宏基站发起接入请求。
203： 宏基站 A接收到接入请求后， 与 UE建立控制面连接并为 UE分配小区无线网络临 时标识 C-RNTI ;
该步骤为宏基站 A根据用户设备的接入请求与 UE建立控制面连接， 并为该 UE分配第 一小区无线网络临时标识； 在本发明实施例中， 该第一小区无线网络临时标识具体为小区 无线网络临时标识 C-RNT I。
在本发明实施例中， 步骤 202-步骤 203是 UE先对基站类型进行识别， 并根据识别结果 向宏基站发起接入请求的过程， 在另一个实施例中， 该过程还可以替换为： 当 UE接入由宏 基站网络和微基站网络共同覆盖的小区时， 根据小区接入控制策略， 由 UE向其测量得到的 RSRP (Reference Signal Receiving Power,参考信号接收功率）或 RSRQ (Reference Signal Receiving Quality,参考信号接收质量）值高的基站发起接入请求； 如果宏基站 RSRP/RSRQ 值高， 则由宏基站分配 C-RNTI标识并建立控制面连接； 如果微基站 RSRP/RSRQ值高， 微基 站拒绝 /不响应（即， 拒绝或不响应）该接入请求， UE通过向 RSRP/RSRQ值次高的基站重新 发起接入请求直至找到同覆盖的宏基站。
在该过程中，只有宏基站接受并处理 UE发起的接入请求，一旦微基站接收到接入请求， 该微基站拒绝 /不响应接入请求， 使得 UE在入网时， 首先与宏基站建立控制面的联系， 并 由宏基站为 UE分配小区无线网络临时标识 C_RNTI。
204： 宏基站 A建立到 MME (Mobility Mangment Entity, 移动管理单元） 的控制面连 接；
本领域技术人员可以获知， 在完成用户合法性和 QoS鉴权后， 即可建立宏基站 A到匪 E 的控制面连接。 205： UE向建立了控制面连接的宏基站 A上报检测到的微基站及微基站的信号质量； 206： 当宏基站 A接收到 UE的上报后， 为 UE选择接入的微基站 B;
在本发明实施例中， 为 UE选择接入的微基站的考虑因素包括基站负载、 用户业务或用 户的移动速度等。
207： 宏基站 A向 UE发送接入微基站 B的通知；
208： UE接收到宏基站 A发送的通知后， 接入微基站 B并与微基站 B建立数据面连接；
209： 宏基站 A向微基站 B转发用户设备的上下文信息， 该上下文信息中包括为该用户 分配的小区无线网络临时标识 C-RNTI ;
在本发明实施例中， 步骤 203-步骤 209是用户在宏基站和微基站同覆盖场景下的入网 流程， 此后 UE和微基站 B使用步骤 209中得到的小区无线网络临时标识 C-RNTI在上下行 调度中唯一识别该 UE。
需要说明的是， 用户在入网时， 可根据自身的速度选择性的接入基站， 当用户设备的 速度超过预设阈值， 也即是用户设备为高速用户设备时， 该高速用户设备可以和宏基站建 立数据面和控制面的连接， 且， 用户设备的速度是变化的， 一旦该高速用户设备的速度降 到预设阈值以下， 则宏基站可以根据该高速用户设备上报的测量报告， 控制用户设备将数 据面连接到指定的微基站。 另外， 对于 Idle (空闲） 用户来说， 可以仅接收宏基站的控制 信息， 以便保持与宏基站间的联系， 便于宏基站对其进行指示， 一旦该 Idle用户开始活跃， 则先和宏基站建立控制面连接， 再由宏基站指示其与指定的微基站或该宏基站建立数据面 连接， 以进行进一步通信。
步骤 205-209 为当接收到该用户设备上报的微基站测量报告时， 根据预设策略为该用 户设备选择微基站， 使得该用户设备与该微基站建立数据面连接， 并将该用户设备的上下 文信息通知给该微基站， 该用户设备的上下文信息包括为该用户设备分配的第一小区无线 网络临时标识。
在步骤 209后， 此时的 UE已经与宏基站 A建立了控制面连接， 并且与微基站 B建立了 数据面连接， 当 UE移动时， 当前宏基站 A根据用户设备上报的测量报告判断是否进行基站 切换， 如果是， 根据源基站和目的基站的类型， 指示该用户设备将该数据面连接或该控制 面连接切换到目的基站；
而由于宏基站和微基站覆盖的范围， 可以有三种情况：
( 1 ) 参见图 3a， 当源基站和目的基站均为被当前宏基站覆盖的微基站时， 即 UE从同 一宏基站范围内的一个微基站移动到另一微基站， 这种情况是指一宏基站覆盖多个微基站， 而 UE从其覆盖的一个微基站移动到另一个； 此时， 当前宏基站保留上述控制面连接， 并向 UE发送第一切换指令， 该第一切换指令 用于指示 UE将 UE和源基站的数据面连接切换到目的基站；
( 2 )参见图 3b， 当源基站为当前宏基站覆盖的微基站、 目的基站为当前宏基站时， 即 UE从同一宏基站范围内的微基站移动到该宏基站内； 这种情况是指一宏基站至少覆盖一个 微基站， 而 UE从该微基站内移动到该微基站外， 但仍在该宏基站范围内；
此时， 当前宏基站保留上述控制面连接， 并向 UE发送第一切换指令， 该第一切换指令 用于指示 UE将 UE和源基站的数据面连接切换到目的基站；
( 3 )参见图 3c， 当源基站为当前宏基站， 目的基站为当前宏基站覆盖的微基站时， 即 UE从宏基站覆盖的该微基站以外的区域移动进微基站的范围内， 这种情况是指一宏基站至 少覆盖一个微基站， 而 UE从该微基站以外的区域移动到该微基站以内的区域， 但仍在该宏 基站范围内；
此时， 当前宏基站保留上述控制面连接， 并向 UE发送第一切换指令， 该第一切换指令 用于指示 UE将 UE和源基站的数据面连接切换到所述目的基站； 对于第 （1 )种情况， 参见图 4， 图 4为 UE从同一宏基站范围内的一个微基站移动到另 一微基站时的接入基站流程图， 如图 4所示， 在本实施例中， UE从同一宏基站范围内的一 个微基站移动到另一微基站为例， 详细介绍本实施例的技术方案， 本实施例方法包括：
401： UE周期性的或通过事件触发向覆盖微基站 B和 C的宏基站 A上报测量报告； 由于用户设备的移动， 需要不断的向为其服务的基站发送测量报告， 如， 在 LTE ( Long Term Evolution, 长期演进） 系统中， 用户设备需要发送 A2事件测量报告， 在 A2事件测 量报告中主要包含 RSRP或 RSRQ, 基站根据这些信息判断用户设备是否需要发生切换。
在本发明实施例中， 步骤 401是 UE检测服务基站和相邻基站的信号质量并向当前服务 的宏基站上报信道状态的过程。
402： 宏基站 A接收到测量报告， 当根据测量报告确定 UE需要切换基站时， 为用 户选择微基站 C;
该步骤 401-402 为根据用户设备上报的测量报告判断是否进行基站切换的过程， 在本 发明实施例中， 宏基站 A根据预设策略及接入控制策略选择目的基站， 该基站根据用户设 备发送的测量报告确定用户设备是否需要切换的具体过程与现有技术相同， 在此不再赘述。 且， 宏基站 A 中有宏基站范围内各个微基站的资源使用和用户信息， 由宏基站进行目的基 站的选择及完成接入控制。 该步骤与现有技术中的不同之处在于， 省略了由源基站向目的 基站发送切换请求的信令， 同时还省略了目的基站向源基站发送切换请求确认信令， 节约 了切换的时间。
在一个实施例中， 宏基站 A 中有宏基站范围内各个微基站的资源使用和用户信息， 即 为： 宏基站 A中有宏基站和宏基站范围内各个微基站的资源使用和用户信息。
403： 宏基站 A通知源基站 （即微基站 B) 向目的基站 （即微基站 C) 转发当前传输状 态及尚未发送的缓存数据包；
404： 宏基站 A通知 UE进行基站切换， gp， 宏基站 A向 UE发送第一切换指令；
405： 当源基站接收到来自宏基站 A的转发通知后， 向目的基站转发当前传输状态及尚 未发送的缓存数据包；
在本发明实施例中， UE在同一个宏基站范围内移动时， 一直保持着与宏基站的控制面 连接， 当需要进行微基站的切换时， 则只将数据面切换到目的基站。
406： UE与目的基站之间进行数据面上行同步；
407： UE接收到进行基站切换的通知并执行基站切换后， 通知宏基站 A基站切换完毕；
408： 宏基站 A接收到 UE的通知后， 将用户设备的上下文信息发送给目的基站， 其中， 该用户设备的上下文信息包括为 UE分配的第一小区无线网络临时标识 C-RNTI ;
在本发明实施例中， 通过步骤 408， 由宏基站通知目的基站该 UE使用的小区无线网络 临时标识 C-RNTI , 而不需要由目的基站重新分配并通过源基站下发至用户进行更新， 较大 提高了基站的效率， 减少了通信中交换的信令信息量， 节约了空中接口资源。
409： 目的基站与核心网进行数据面切换；
步骤 401-步骤 409是基站切换的过程， 该过程之后还可以包括：
410： 宏基站 A通知源基站释放 UE的上下文信息；
411： 源基站释放 UE的上下文信息。
综上所述， 当该源基站和该目的基站均为被该当前宏基站覆盖的微基站时， 保留该控 制面连接， 并向该用户设备发送第一切换指令 （即步骤 404中通知切换时所用的指令）， 该 第一切换指令用于指示该用户设备将该用户设备和该源基站的数据面连接切换到该目的基 站。 可选地， 该方法还包括： 将该用户设备的第一小区无线网络临时标识通知给该目的基 站。
对于第 （2 )种情况， 参见图 5， 图 5为 UE从宏基站范围内的一个微基站移动到宏基站 时的接入基站流程图， 如图 5所示， 在本实施例中， UE从宏基站范围内的一个微基站移动 到宏基站为例， 详细介绍本实施例的技术方案， 本实施例方法包括：
501： UE从宏基站 A范围内的微基站 B的区域进入微基站 B以外的区域后， 向宏基站 A 上报测量报告； 502： 宏基站 A接收到测量报告， 当根据测量报告确定 UE需要切换基站时， 为 UE 选择宏基站 A;
在本发明实施例中， UE进入宏基站 A中不覆盖微基站 B的区域， 则宏基站 A根据接入 控制策略选择目的基站， 该基站根据用户设备发送的测量报告确定用户设备是否需要切换 的具体过程与现有技术相同， 在此不再赘述。 且， 宏基站 A 中有宏基站范围内各个微基站 的资源使用和用户信息， 由宏基站进行目的基站的选择及完成接入控制。 该步骤省略了由 源基站向目的基站发送切换请求的信令， 同时还省略了目的基站向源基站发送切换请求确 认信令， 节约了切换的时间。
在一个实施例中， 宏基站 A 中有宏基站范围内各个微基站的资源使用和用户信息， 即 为： 宏基站 A中有宏基站和宏基站范围内各个微基站的资源使用和用户信息。
503： 宏基站 A通知源基站 （即微基站 B ) 向目的基站 （即宏基站 A) 转发当前传输状 态及尚未发送的缓存数据包；
504： 宏基站 A通知 UE进行基站切换， gp， 宏基站 A向 UE发送第一切换指令；
505： 当微基站 B接收到来自宏基站 A的转发通知后， 向宏基站 A转发当前传输状态及 尚未发送的缓存数据包；
在本发明实施例中， UE在同一个宏基站范围内移动时， 一直保持着与宏基站的控制面 连接， 当需要进行基站的切换时， 则只将数据面切换到目的基站。
506： UE接收到进行基站切换的通知并执行基站切换后， 通知宏基站 A基站切换完毕；
507： 目的基站与核心网进行数据面切换；
508： 宏基站 A接收到 UE的通知后， 通知源基站释放 UE的上下文信息；
在本发明实施例中， 由于宏基站 A已经有 UE的上下文信息， 也已经获得同步， 因此对 上下文信息和同步的处理信令也已经省略。
509： 源基站接收到释放 UE上下文信息的通知后， 释放 UE的上下文信息。
综上所述， 当该源基站为该当前宏基站覆盖的微基站、 该目的基站为该当前宏基站时， 保留该控制面连接， 并向该用户设备发送第一切换指令 （即步骤 504 中通知切换时所用的 指令）， 该第一切换指令用于指示该用户设备将该用户设备和该源基站的数据面连接切换到 该目的基站。
对于第 （3 )种情况， 参见图 6， 图 6为 UE从宏基站未覆盖微基站的区域移动到微基站 时的接入基站流程图， 如图 6所示， 在本实施例中， UE从宏基站中微基站未覆盖到的区域 移动到微基站为例， 详细介绍本实施例的技术方案， 本实施例方法包括：
601： UE从宏基站 A范围内微基站 B以外的区域进入微基站 B的区域后， 向宏基站 A上 报测量报告；
602： 宏基站 A接收到测量报告， 当根据测量报告确定 UE需要切换基站时， 为 UE 选择微基站 B;
在本发明实施例中， UE进入宏基站 A中微基站 B的区域， 则宏基站 A根据接入控制策 略选择目的基站， 该基站根据用户设备发送的测量报告确定用户设备是否需要切换的具体 过程与现有技术相同， 在此不再赘述。 且， 宏基站 A 中有宏基站范围内各个微基站的资源 使用和用户信息， 由宏基站进行目的基站的选择及完成接入控制。 该步骤省略了由源基站 向目的基站发送切换请求的信令， 同时还省略了目的基站向源架站发送切换请求确认信令， 节约了切换的时间。
在一个实施例中， 宏基站 A 中有宏基站范围内各个微基站的资源使用和用户信息， 即 为： 宏基站 A中有宏基站和宏基站范围内各个微基站的资源使用和用户信息。
603： 宏基站 A向目的基站（即微基站 B)转发当前传输状态及尚未发送的缓存数据包; 604： 宏基站 A通知 UE进行基站切换， gp， 宏基站 A向 UE发送第一切换指令；
605： UE和目的基站 （微基站 B) 进行数据面上行同步；
606： UE接收到进行基站切换的通知并执行基站切换后， 通知宏基站 A基站切换完毕；
607： 宏基站 A接收到 UE的通知后， 将用户设备的上下文信息发送给目的基站 （微基 站 B)，其中，该用户设备的上下文信息包括为 UE分配的第一小区无线网络临时标识 C-RNTI ;
该步骤 601-607与步骤 501-509不同之处在于宏基站 A需要向微基站 B发送包含 C-RNTI 的用户设备的上下文信息， 以便用于后续控制通话过程中， 且由于源基站是控制接入的宏 基站， 所以无需进行释放步骤。
综上所述， 当该源基站为该当前宏基站， 该目的基站为该当前宏基站覆盖的微基站时， 保留该控制面连接， 并向该用户设备发送第一切换指令 （即步骤 604 中通知切换时所用的 指令）， 该第一切换指令用于指示该用户设备将该用户设备和该源基站的数据面连接切换到 该目的基站； 可选地， 该方法还包括： 将该用户设备的第一小区无线网络临时标识通知给 该目的基站。
上述三种实施例中， 当该源基站和该目的基站均为被当前宏基站覆盖的微基站时， 将 用户设备的第一小区无线网络临时标识通知给该目的基站； 当该源基站为该当前宏基站， 该目的基站为该当前宏基站覆盖的微基站时， 将用户设备的第一小区无线网络临时标识通 知给该目的基站。 省略了源微基站和目的微基站之间的切换请求信令交互， 而由宏基站统 一进行接入控制并直接向用户发送切换命令可以较大加速切换过程， 有效降低快速移动用 户的掉话概率， 提高了基站效率及无线资源的利用率。 同时保留小区无线网络临时标识 C-RNTI , 可以简化微基站功能， 而且无需经源微基站由空口下发该信息给用户可以节省骨 干网和无线资源开销。
在一个实施例中， 当源基站为当前宏基站， 目的基站为第二宏基站， 且与 UE建立数据 面连接的微基站跨越当前宏基站和第二宏基站时， 当前宏基站保留微基站与 UE的数据面连 接， 并向 UE发送第二切换指令， 第二切换指令用于指示 UE将控制面连接从当前宏基站切 换到第二宏基站。 针对这种情况， 具体流程为：
如图 7所示， 当源基站和目的基站为跨越两个宏基站 A、 D的同一微基站 B， 则将用户 设备的控制面从源基站 B所在的第一宏基站 A切换到所述目的基站所在的第二宏基站 D;仍 以图 7为例， 在另一个实施例中， 当源基站和目的基站为两个宏基站 A、 D， 则将用户设备 的控制面从第一宏基站 A切换到所述第二宏基站 D。
具体的， 在一个微基站跨越多个宏基站的场景中， 用户在同一个微基站覆盖范围内的 多个宏基站之间切换时， 保留原来和微基站建立的数据面连接， 只将控制面连接从源宏基 站切换到目的宏基站， 参见图 8， 本实施例的方法包括：
801： UE周期性的或通过事件触发向当前服务的宏基站 A (即源基站） 上报测量报告； 802： 宏基站 A接收到测量报告， 当根据测量报告确定 UE需要切换基站时， 为用 户选择宏基站 D (即目的基站）；
803： 宏基站 A向宏基站 D发送切换请求， 该切换请求携带源基站分配的小区无线 网络临时标识 (C-RNTI)— S， 其中后缀 S代表这个小区无线网络临时标识是由源基站分配的；
804： 宏基站 D接收到切换请求后， 进行网络进入及为用户分配一 (C-RNTI)— T标识， 后 缀 T代表由目的基站重新分配的小区无线网络临时标识 (C-RNTI)— T;
因为在目的基站不需要为用户重新分配数据面无线传输资源， 因此原来在目的基站侧 的接入控制在这里可以简化为网络进入， 即只需要进行控制链路传输资源分配。
805： 宏基站 D 向宏基站 A发送确认切换消息， 该消息中携带宏基站 D为用户分配的 (C-RNTI)— T标识；
806： 宏基站 A通知 UE进行基站切换， 即宏基站 A向 UE发送第二切换指令。 该切换命 令中携带宏基站 D为用户分配的 (C-RNTI)— T标识；
目的基站为用户重新分配 (C-RNTI)— T标识并通过源基站 （宏基站 A) 对用户进行小区 无线网络临时标识更新。
807： UE接收到基站切换通知后， 与宏基站 D进行控制面上行同步；
808： UE接收到进行基站切换的通知并执行基站切换后， 通知宏基站 D基站切换完毕；
809： UE和宏基站 D建立控制面连接后， 宏基站 D通知微基站 B更新 UE的小区无线网 络临时标识为 （C-RNTI) _T;
需要说明的是， 该由宏基站 D通知的 (C-RNTI)— T即为本发明实施例中所述的第二小区 无线网络临时标识， 本领域技术人员可以获知， 在接下来的数据调度中使用该第二小区无 线网络临时标识 (C-RNTI)— T唯一识别该用户设备。
810： 宏基站 D通知宏基站 A释放 UE的上下文信息；
其中， 该上下文信息包括第一小区无线网络临时标识。
811： 宏基站 A释放 UE的上下文信息。
综上所述， 当该源基站为该当前宏基站， 该目的基站为第二宏基站， 且与该用户设备 建立数据面连接的微基站跨越该当前宏基站和该第二宏基站时， 保留该微基站与该用户设 备的数据面连接， 并向该用户设备发送第二切换指令 （即步骤 806 中通知切换时所用的指 令）， 该第二切换指令用于指示该用户设备将该控制面连接从该当前宏基站切换到该第二宏 基站。
需要说明的是， 这个切换过程只涉及控制面连接的切换， 而用户数据面的连接一直保 留着， 所以不会产生掉线， 不会影响用户数据传输。 在本发明实施例中， 当宏基站 D接收 到来自其它宏基站（即宏基站 A) 的切换基站请求时， 为该用户设备分配第二小区无线网络 临时标识， 并将该第二小区无线网络临时标识通知给该其它宏基站， 以使得该其它宏基站 对该用户设备的第一小区无线网络临时标识进行更新， 该切换基站请求携带该其它基站分 配给用户设备的该第一小区无线网络临时标识。 可选地， 该方法还包括： 通知该其它宏基 站释放关于该用户设备的上下文信息， 该上下文信息包括该第一小区无线网络临时标识。
在一个实施例中， 当源基站为当前宏基站覆盖的微基站， 目的基站为第三宏基站覆盖 的微基站时， 当前宏基站向上述 UE发送第三切换指令， 第三切换指令用于指示 UE将 UE的 数据面连接从源基站切换到目的基站， 并将控制面连接从当前宏基站切换到第三宏基站。 针对这种情况， 具体流程为：
如图 9所示， 当该源基站和该目的基站分别为在不同宏基站覆盖范围内的微基站时， 具体地， 以宏基站 A覆盖微基站 B， 宏基站 D覆盖微基站 C， 且用户从微基站 B的范围内移 动到微基站 C的范围内为例进行说明， 参见图 10， 本实施例的方法包括：
1001： UE向覆盖微基站 B的宏基站 A上报测量报告；
1002： 宏基站 A接收到测量报告， 当根据测量报告确定 UE需要切换基站时， 为用 户设备选择宏基站 D;
1003： 宏基站 A向宏基站 D发送切换请求， 该切换请求携带源基站分配的小区无线网 络临时标识 (C-RNTI)— S， 其中后缀 S代表这个小区无线网络临时标识是由源基站分配的； 1004： 宏基站 D接收切换请求， 进行网络进入及为用户分配一 (C-RNTI)— T标识， 并根 据接入控制策略为 UE选择微基站 C;
1005： 宏基站 D向宏基站 A发送确认切换消息， 该消息中携带宏基站 D为用户分配的 (C-RNTI)— T标识；
1006： 宏基站 A通知微基站 B向微基站 C转发当前传输状态及尚未发送的缓存数据包;
1007： 宏基站 A通知 UE进行基站切换， gp， 宏基站 A向 UE发送第三切换指令， 该切 换命令中携带宏基站 D为用户分配的 (C-RNTI)— T标识；
1008： 当微基站 B接收到来自宏基站 A的转发通知后， 向微基站 C转发当前传输状态 及尚未发送的缓存数据包；
1009： UE与宏基站 D之间进行控制面上行同步；
1010： UE与微基站 C之间进行数据面上行同步；
1011： UE接收到进行基站切换的通知并执行基站切换后 （即， 将控制面连接从宏基站 A切换到宏基站 D，将数据面连接从微基站 B切换到微基站 C)，通知宏基站 D基站切换完毕;
1012： 宏基站 D接收到 UE的通知后， 将用户设备的上下文信息发送给微基站 C， 其中， 用户设备的上下文信息包括小区无线网络临时标识 (C-RNTI)— T;
1013： 微基站 C与核心网进行数据面切换；
1014： 宏基站 D通知宏基站 A释放 UE的上下文信息；
1015： 宏基站 A通知微基站 B释放 UE的上下文信息；
1016： 微基站 B释放 UE的上下文信息；
1017： 宏基站 A释放 UE的上下文信息。
在该实施例中， 当所述源基站和所述目的基站分别为在不同宏基站覆盖范围内的微基 站时， 将用户设备的数据面从该源基站切换到该目的基站， 并将该用户设备的控制面从覆 盖该源基站的宏基站切换到覆盖该目的基站的宏基站， 包含了微基站之间数据面的切换和 宏基站之间控制面的切换， 由目的基站 （即， 目的宏基站） 为用户分配新的 C-RNTI , 并通 知 UE更新， 根据该新的 C-RNTI在上下行调度中唯一识别该 UE。
综上所述， 当该源基站为该当前宏基站覆盖的微基站， 该目的基站为第三宏基站覆盖 的微基站时， 向该用户设备发送第三切换指令， 该第三切换指令用于指示该用户设备将用 户设备的数据面连接从源基站切换到目的基站， 并将控制面连接从当前宏基站切换到第三 宏基站。
可选地， 该方法还包括： 通知该当前宏基站释放关于该用户设备的上下文信息， 该上 下文信息包括该第一小区无线网络临时标识。 在本发明提供的实施例中， 用户控制面通过宏基站连接到 MME, 用户数据面通过微基站 连接到 S-GW， S-GW和匪 E两个功能体可以位于同一个物理实体内或通过高速链路直连或通 过骨干网有逻辑连接。
本发明针对宏基站网络和微基站网络同覆盖的场景， 通过由宏基站统一进行接入控制 并分配小区无线网络临时标识， 可以较大加速接入过程及后续的切换过程， 有效降低快速 移动用户的掉话概率， 提高了基站效率及无线资源的利用率。 在进行基站切换时， 根据源 基站和目的基站的类型， 将该用户设备的数据面或控制面切换到目的基站； 并当目的基站 为和源基站在当前宏基站覆盖范围内的微基站时， 通知目的基站用户设备的小区无线网络 临时标识， 以保留小区无线网络临时标识 C-RNTI , 可以简化微基站功能， 而且无需经源基 站由空口下发该信息给用户设备， 可以节省骨干网和无线资源开销。 且将在微基站覆盖范 围内用户的部分控制功能， 如用户管理及移动管理功能， 由微基站上移到宏基站进行集中 处理， 省略了源微基站和目的微基站之间的切换请求信令交互。
实施例 3
为了提高基站效率， 提高无线资源利用率， 本发明实施例提供了一种接入基站的方法， 参见图 11， 该方法包括：
1101： 与宏基站建立控制面连接， 并接收该宏基站分配的小区无线网络临时标识；
1102： 上报监测到的微基站测量报告， 并接入该宏基站根据该微基站测量报告选择的 微基站， 与该宏基站选择的微基站建立数据面连接， 该微基站通过接收该宏基站转发的用 户设备的上下文信息以获知用户的小区无线网络临时标识。
在一个实施例中， 该方法还可以包括：
1103， 当所在区域没有微基站覆盖或该宏基站未选择微基站时， 与该宏基站建立数据 面连接。
该方法还可以包括：
1104， 上报测量报告给所述宏基站， 以使所述宏基站根据所述测量报告判断是否进行 基站切换；
1105， 在需要进行切换时， 根据该宏基站的指示将该数据面连接或该控制面连接切换 到目的基站。
步骤 1105中， 根据该宏基站的指示将该数据面连接或该控制面连接切换到目的基站， 具体包括：
当接收到上述宏基站的第一切换指令时， 保留上述控制面连接， 并将上述数据面连接 切换到上述目的基站； 当接收到上述宏基站的第二切换指令时， 保留上述数据面连接， 并将上述控制面连接 切换到上述目的基站；
当接收到上述宏基站得第三切换指令时， 将上述数据面连接从上述源基站切换到上述 目的基站， 并将上述控制面连接切换到覆盖上述目的基站的宏基站。
针对宏基站网络和微基站网络同覆盖的场景， 通过由宏基站统一进行接入控制并分配 小区无线网络临时标识， 可以较大加速接入过程及后续的切换过程， 有效降低快速移动用 户的掉话概率， 提高了基站效率及无线资源的利用率。 实施例 4
为了提高基站效率， 提高无线资源利用率， 本发明实施例提供了一种基站， 在本发明 实施例中， 用户初始时所要接入的基站由宏基站网络和微基站网络同覆盖， 因此在用户接 入基站时， 需分别与宏基站和微基站建立控制面和数据面连接， 参见图 12， 该基站包括： 控制面连接建立模块 1201， 用于根据用户设备的接入请求与该用户设备建立控制面连 接， 并为该用户设备分配第一小区无线网络临时标识；
第一标识维护模块 1202， 用于当接收到该用户设备上报的微基站测量报告时， 根据预 设策略为该用户设备选择微基站， 使得该用户设备与该微基站建立数据面连接， 并将该用 户设备的上下文信息通知给该微基站， 该上下文信息包括为该用户设备分配的第一小区无 线网络临时标识。
参见图 13， 该基站还包括：
数据面建立模块 1203， 用于当该用户设备所在区域没有微基站覆盖或未为该用户设备 选择微基站时， 与该用户设备建立数据面连接。
该基站还包括：
切换模块 1204， 用于根据该用户设备上报的测量报告判断是否进行基站切换， 如果是， 根据源基站和目的基站的类型， 指示该用户设备将该数据面连接或该控制面连接切换到目 的基站；
该切换模块 1204包括：
第一切换单元 1204a，用于当该源基站和该目的基站均为被该当前宏基站覆盖的微基站 时， 保留该控制面连接， 并向该用户设备发送第一切换指令， 该第一切换指令用于指示该 用户设备将该用户设备和该源基站的数据面连接切换到该目的基站；
第二切换单元 1204b， 用于当该源基站为该当前宏基站覆盖的微基站、该目的基站为该 当前宏基站时， 保留该控制面连接， 并向该用户设备发送第一切换指令， 该第一切换指令 用于指示该用户设备将该用户设备和该源基站的数据面连接切换到该目的基站； 第三切换单元 1204c， 用于当该源基站为该当前宏基站， 该目的基站为该当前宏基站覆 盖的微基站时， 保留该控制面连接， 并向该用户设备发送第一切换指令， 该第一切换指令 用于指示该用户设备将该用户设备和该源基站的数据面连接切换到该目的基站；
第四切换单元 1204d， 用于当该源基站为该当前宏基站， 该目的基站为第二宏基站， 且 与该用户设备建立数据面连接的微基站跨越该当前宏基站和该第二宏基站时， 保留该微基 站与该用户设备的数据面连接， 并向该用户设备发送第二切换指令， 该第二切换指令用于 指示该用户设备将该控制面连接从该当前宏基站切换到该第二宏基站。
第五切换单元 1204e， 用于当该源基站为该当前宏基站覆盖的微基站， 该目的基站为第 三宏基站覆盖的微基站时， 该当前宏基站向该用户设备发送第三切换指令， 该第三切换指 令用于指示该用户设备将用户设备的数据面连接从该源基站切换到该目的基站， 并将该控 制面连接从该当前宏基站切换到该第三宏基站。
该基站还包括：
第二标识维护模块 1205， 用于当该目的基站为该当前宏基站覆盖范围内的微基站时， 将该用户设备的第一小区无线网络临时标识通知给该目的基站。
第三标识维护模块 1206， 用于当接收到来自其它宏基站的切换基站请求时， 为该用户 设备分配第二小区无线网络临时标识， 并将该第二小区无线网络临时标识通知给该其它宏 基站， 以使得该其它宏基站对该用户设备的第一小区无线网络临时标识进行更新， 该切换 基站请求携带该其它基站分配给用户设备的该第一小区无线网络临时标识。
该第三标识维护模块 1206 还用于通知该其它宏基站释放关于该用户设备的上下文信 息， 该上下文信息包括该第一小区无线网络临时标识。
本实施例提供的基站， 具体可以为宏基站， 与方法实施例属于同一构思， 其具体实现 过程详见方法实施例， 这里不再赘述。
参见图 14， 本发明实施例还提供了一种用户设备， 包括：
第一连接建立模块 1401， 用于与宏基站建立控制面连接， 并接收该宏基站分配的小区 无线网络临时标识；
第二连接建立模块 1402， 用于上报监测到的微基站测量报告， 并接入该宏基站根据该 微基站测量报告选择的微基站， 与该宏基站选择的微基站建立数据面连接， 该微基站通过 接收该宏基站转发的用户设备的上下文信息以获知用户的小区无线网络临时标识。
该数第二连接建立模块 1402还用于当所在区域没有微基站覆盖或该宏基站未选择微基 站时， 与该宏基站建立数据面连接。 该用户设备还包括：
上报模块 1403， 用于上报测量报告给上述宏基站， 以使上述宏基站根据测量报告判断 是否进行基站切换；
用户切换模块 1404， 用于在需要进行切换时， 根据该宏基站的指示将该数据面连接或 该控制面连接切换到目的基站。
该用户切换模块 1404包括：
第一用户切换单元， 用于当接收到该宏基站的第一切换指令时， 保留该控制面连接， 并将该数据面连接切换到该目的基站；
第二用户切换单元， 用于当接收到该宏基站的第二切换指令时， 保留该数据面连接， 并将该控制面连接切换到该目的基站；
第三用户切换单元， 用于当接收到该宏基站的第三切换指令时， 将该数据面连接从该 源基站切换到该目的基站， 并将该控制面连接切换到覆盖该目的基站的宏基站。
本实施例提供的用户设备， 具体可以为手机， 掌上电脑， 笔记本电脑等， 与方法实施 例属于同一构思， 其具体实现过程详见方法实施例， 这里不再赘述。 本发明针对宏基站网络和微基站网络同覆盖的场景， 通过由宏基站统一进行接入控制 并分配小区无线网络临时标识， 可以较大加速接入过程及后续的切换过程， 有效降低快速 移动用户的掉话概率， 提高了基站效率及无线资源的利用率。 在进行基站切换时， 根据源 基站和目的基站的类型， 将该用户设备的数据面或控制面切换到目的基站； 并当目的基站 为和源基站在当前宏基站覆盖范围内的微基站时， 通知目的基站用户设备的小区无线网络 临时标识， 以保留小区无线网络临时标识 C-RNTI , 可以简化微基站功能， 而且无需经源基 站由空口下发该信息给用户设备， 可以节省骨干网和无线资源开销。 本发明实施例可以利用软件实现， 相应的软件程序可以存储在可读取的存储介质中， 例如， 计算机的硬盘、 缓存或光盘中。 以上所述仅为本发明的较佳实施例， 并不用以限制本发明， 凡在本发明的精神和原则 之内， 所作的任何修改、 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、 一种接入基站的方法， 其特征在于， 所述方法包括：
当前宏基站根据用户设备的接入请求与所述用户设备建立控制面连接， 并为所述用户设 备分配第一小区无线网络临时标识；
当接收到所述用户设备上报的微基站测量报告时， 根据预设策略为所述用户设备选择微 基站， 使得所述用户设备与所述微基站建立数据面连接， 并将所述用户设备的上下文信息通 知给所述微基站， 所述上下文信息包括为所述用户设备分配的第一小区无线网络临时标识。
2、 根据权利要求 1所述的方法， 其特征在于， 所述方法还包括：
当所述用户设备所在区域没有微基站覆盖或未为所述用户设备选择微基站时， 所述当前 宏基站与所述用户设备建立数据面连接
3、 根据权利要求 1或 2所述的方法， 其特征在于， 所述方法还包括：
所述当前宏基站根据所述用户设备上报的测量报告判断是否进行基站切换， 如果是， 根 据源基站和目的基站的类型， 指示所述用户设备将所述数据面连接或所述控制面连接切换到 目的基站。
4、根据权利要求 3所述的方法， 其特征在于， 所述当前宏基站根据源基站和目的基站的 类型， 指示所述用户设备将所述数据面连接或所述控制面连接切换到目的基站， 具体包括： 当所述源基站和所述目的基站均为被所述当前宏基站覆盖的微基站时， 所述当前宏基站 保留所述控制面连接， 并向所述用户设备发送第一切换指令， 所述第一切换指令用于指示所 述用户设备将所述用户设备和所述源基站的数据面连接切换到所述目的基站；
当所述源基站为所述当前宏基站覆盖的微基站、 所述目的基站为所述当前宏基站时， 所 述当前宏基站保留所述控制面连接， 并向所述用户设备发送第一切换指令， 所述第一切换指 令用于指示所述用户设备将所述用户设备和所述源基站的数据面连接切换到所述目的基站； 当所述源基站为所述当前宏基站， 所述目的基站为所述当前宏基站覆盖的微基站时， 所 述当前宏基站保留所述控制面连接， 并向所述用户设备发送第一切换指令， 所述第一切换指 令用于指示所述用户设备将所述用户设备和所述源基站的数据面连接切换到所述目的基站； 当所述源基站为所述当前宏基站， 所述目的基站为第二宏基站， 且与所述用户设备建立 数据面连接的微基站跨越所述当前宏基站和所述第二宏基站时， 所述当前宏基站保留所述微 基站与所述用户设备的数据面连接， 并向所述用户设备发送第二切换指令， 所述第二切换指 令用于指示所述用户设备将所述控制面连接从所述当前宏基站切换到所述第二宏基站。
5、 根据权利要求 4所述的方法， 其特征在于， 所述根据源基站和目的基站的类型， 指示 所述用户设备将所述数据面连接或所述控制面连接切换到目的基站， 还包括：
当所述源基站为所述当前宏基站覆盖的微基站， 所述目的基站为第三宏基站覆盖的微基 站时， 所述当前宏基站向所述用户设备发送第三切换指令， 所述第三切换指令用于指示所述 用户设备将用户设备的数据面连接从所述源基站切换到所述目的基站， 并将所述控制面连接 从所述当前宏基站切换到所述第三宏基站。
6、 根据权利要求 3所述的方法， 其特征在于， 所述方法还包括：
当所述目的基站为所述当前宏基站覆盖范围内的微基站时， 所述当前宏基站将所述用户 设备的第一小区无线网络临时标识通知给所述目的基站。
7、 根据权利要求 3所述的方法， 其特征在于， 所述方法还包括：
当接收到来自其它宏基站的切换基站请求时， 所述当前宏基站为所述用户设备分配第二 小区无线网络临时标识， 并将所述第二小区无线网络临时标识通知给所述其它宏基站， 以使 得所述其它宏基站对所述用户设备的第一小区无线网络临时标识进行更新， 所述切换基站请 求携带所述其它基站分配给用户设备的所述第一小区无线网络临时标识。
8、根据权利要求 7所述的方法， 其特征在于， 将所述第二小区无线网络临时标识通知给 所述目的基站， 之后包括：
所述当前宏基站通知所述其它宏基站释放关于所述用户设备的上下文信息， 所述上下文 信息包括所述第一小区无线网络临时标识。
9、 一种接入基站的方法， 其特征在于， 所述方法包括：
与宏基站建立控制面连接， 并接收所述宏基站分配的小区无线网络临时标识； 上报监测到的微基站测量报告， 并接入所述宏基站根据所述微基站测量报告选择的微基 站， 与所述宏基站选择的微基站建立数据面连接， 所述微基站通过接收所述宏基站转发的用 户设备的上下文信息以获知用户的小区无线网络临时标识。
10、 根据权利要求 9所述的方法， 其特征在于， 所述方法还包括：
当所在区域没有微基站覆盖或所述宏基站未选择微基站时， 与所述宏基站建立数据面连 接。
11、 根据权利要求 9或 10所述的方法， 其特征在于， 所述方法还包括：
上报测量报告给所述宏基站，以使所述宏基站根据所述测量报告判断是否进行基站切换； 在需要进行切换时， 根据所述宏基站的指示将所述数据面连接或所述控制面连接切换到 目的基站。
12、根据权利要求 11所述的方法， 其特征在于， 根据所述宏基站的指示将所述数据面连 接或所述控制面连接切换到目的基站， 具体包括：
当接收到所述宏基站的第一切换指令时， 保留所述控制面连接， 并将所述数据面连接切 换到所述目的基站；
当接收到所述宏基站的第二切换指令时， 保留所述数据面连接， 并将所述控制面连接切 换到所述目的基站；
当接收到所述宏基站得第三切换指令时， 将所述数据面连接从所述源基站切换到所述目 的基站， 并将所述控制面连接切换到覆盖所述目的基站的宏基站。
13、 一种基站， 其特征在于， 包括：
控制面连接建立模块， 用于根据用户设备的接入请求与所述用户设备建立控制面连接， 并为所述用户设备分配第一小区无线网络临时标识；
第一标识维护模块， 用于当接收到所述用户设备上报的微基站测量报告时， 根据预设策 略为所述用户设备选择微基站， 使得所述用户设备与所述微基站建立数据面连接， 并将所述 用户设备的上下文信息通知给所述微基站， 所述上下文信息包括为所述用户设备分配的第一 小区无线网络临时标识。
14、 根据权利要求 13所述的基站， 其特征在于， 所述基站还包括：
数据面建立模块， 用于当所述用户设备所在区域没有微基站覆盖或未为所述用户设备选 择微基站时， 与所述用户设备建立数据面连接。
15、 根据权利要求 13或 14所述的基站， 其特征在于， 所述基站还包括：
切换模块， 用于根据所述用户设备上报的测量报告判断是否进行基站切换， 如果是， 根 据源基站和目的基站的类型， 指示所述用户设备将所述数据面连接或所述控制面连接切换到 目的基站。
16、 根据权利要求 15所述的基站， 其特征在于， 所述切换模块包括：
第一切换单元， 用于当所述源基站和所述目的基站均为被所述当前宏基站覆盖的微基站 时， 保留所述控制面连接， 并向所述用户设备发送第一切换指令， 所述第一切换指令用于指 示所述用户设备将所述用户设备和所述源基站的数据面连接切换到所述目的基站；
第二切换单元， 用于当所述源基站为所述当前宏基站覆盖的微基站、 所述目的基站为所 述当前宏基站时， 保留所述控制面连接， 并向所述用户设备发送第一切换指令， 所述第一切 换指令用于指示所述用户设备将所述用户设备和所述源基站的数据面连接切换到所述目的基 站；
第三切换单元， 用于当所述源基站为所述当前宏基站， 所述目的基站为所述当前宏基站 覆盖的微基站时， 保留所述控制面连接， 并向所述用户设备发送第一切换指令， 所述第一切 换指令用于指示所述用户设备将所述用户设备和所述源基站的数据面连接切换到所述目的基 站；
第四切换单元， 用于当所述源基站为所述当前宏基站， 所述目的基站为第二宏基站， 且 与所述用户设备建立数据面连接的微基站跨越所述当前宏基站和所述第二宏基站时， 保留所 述微基站与所述用户设备的数据面连接， 并向所述用户设备发送第二切换指令， 所述第二切 换指令用于指示所述用户设备将所述控制面连接从所述当前宏基站切换到所述第二宏基站。
17、 根据权利要求 16所述的基站， 其特征在于， 所述切换模块还包括：
第五切换单元， 用于当所述源基站为所述当前宏基站覆盖的微基站， 所述目的基站为第 三宏基站覆盖的微基站时， 所述当前宏基站向所述用户设备发送第三切换指令， 所述第三切 换指令用于指示所述用户设备将用户设备的数据面连接从所述源基站切换到所述目的基站， 并将所述控制面连接从所述当前宏基站切换到所述第三宏基站。
18、 根据权利要求 15的基站， 其特征在于， 所述基站还包括：
第二标识维护模块， 用于当所述目的基站为所述当前宏基站覆盖范围内的微基站时， 将 所述用户设备的第一小区无线网络临时标识通知给所述目的基站。
19、 根据权利要求 15的基站， 其特征在于， 所述基站还包括：
第三标识维护模块， 用于当接收到来自其它宏基站的切换基站请求时， 为所述用户设备 分配第二小区无线网络临时标识， 并将所述第二小区无线网络临时标识通知给所述其它宏基 站， 以使得所述其它宏基站对所述用户设备的第一小区无线网络临时标识进行更新， 所述切 换基站请求携带所述其它基站分配给用户设备的所述第一小区无线网络临时标识。
20、根据权利要求 19的基站， 其特征在于， 所述第三标识维护模块还用于通知所述其它 宏基站释放关于所述用户设备的上下文信息， 所述上下文信息包括所述第一小区无线网络临 时标识。
21、 一种用户设备， 其特征在于， 所述方法包括：
第一连接建立模块， 用于与宏基站建立控制面连接， 并接收所述宏基站分配的小区无线 网络临时标识；
第二连接建立模块， 用于上报监测到的微基站测量报告， 并接入所述宏基站根据所述微 基站测量报告选择的微基站， 与所述宏基站选择的微基站建立数据面连接， 所述微基站通过 接收所述宏基站转发的用户设备的上下文信息以获知用户的小区无线网络临时标识。
22、根据权利要求 21所述的用户设备， 其特征在于， 所述第二连接建立模块还用于当所 在区域没有微基站覆盖或所述宏基站未选择微基站时， 与所述宏基站建立数据面连接。
23、 根据权利要求 21或 22所述的用户设备， 其特征在于， 所述用户设备还包括： 上报模块， 用于上报测量报告给所述宏基站， 以使所述宏基站根据所述测量报告判断是 否进行基站切换；
用户切换模块， 用于在需要进行切换时， 根据所述宏基站的指示将所述数据面连接或所 述控制面连接切换到目的基站。
24、 根据权利要求 23所述的用户设备， 其特征在于， 所述用户切换模块包括： 第一用户切换单元， 用于当接收到所述宏基站的第一切换指令时， 保留所述控制面连接， 并将所述数据面连接切换到所述目的基站；
第二用户切换单元， 用于当接收到所述宏基站的第二切换指令时， 保留所述数据面连接， 并将所述控制面连接切换到所述目的基站；
第三用户切换单元， 用于当接收到所述宏基站得第三切换指令时， 将所述数据面连接从 所述源基站切换到所述目的基站， 并将所述控制面连接切换到覆盖所述目的基站的宏基站。
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