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WO2015039315A1 - 小站通信方法、设备和系统 - Google Patents

小站通信方法、设备和系统 Download PDF

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Publication number
WO2015039315A1
WO2015039315A1 PCT/CN2013/083807 CN2013083807W WO2015039315A1 WO 2015039315 A1 WO2015039315 A1 WO 2015039315A1 CN 2013083807 W CN2013083807 W CN 2013083807W WO 2015039315 A1 WO2015039315 A1 WO 2015039315A1
Authority
WO
WIPO (PCT)
Prior art keywords
station
small station
small
accessed
macro
Prior art date
Application number
PCT/CN2013/083807
Other languages
English (en)
French (fr)
Inventor
胡振兴
张戬
权威
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 CN201380001929.XA priority Critical patent/CN104782172B/zh
Priority to PCT/CN2013/083807 priority patent/WO2015039315A1/zh
Publication of WO2015039315A1 publication Critical patent/WO2015039315A1/zh

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Classifications

    • 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
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • Embodiments of the present invention relate to the field of wireless communications, and in particular, to a small station communication method, device, and system. Background technique
  • the 4th generation communication system uses the homogeneous network used in the original 2nd/2.5th and 3rd generation communication systems.
  • HetNet heterogeneous network
  • the macro station is responsible for wide coverage.
  • the covered area is called macro cell to meet mobility and no.
  • the need for seam coverage; the small station is used to supplement the coverage of the macro station.
  • the smaller hotspot area covered by the small station is called a micro cell or a small cell.
  • the embodiments of the present invention provide a small station communication method, device, and system applied in a heterogeneous network scenario, so that a high-speed mobile UE can obtain additional communication services from a small station.
  • the present invention provides a small station communication method, where the method is applied to a heterogeneous network, where the heterogeneous network includes a macro station, and the macro station covers at least one small station, and the method includes:
  • the user equipment UE accesses the macro station and performs data transmission with the macro station.
  • the pre-configuration information It includes small station identification information and small station connection information.
  • the UE Determining, by the UE, the small station to be accessed in the candidate small station according to the small station identification information.
  • the UE establishes a connection with the small station to be accessed according to the small station connection information.
  • the pre-configuration information further includes a connection validity time of the candidate small station; the method further includes: when the UE is connected to the accessed small station The time exceeds the connection validity time, and the UE releases the pre-configuration information of the accessed small station.
  • the method further includes: sending, by the UE, a MAC layer control MAC CE message carrying a release indication to the macro station; Pre-configured information for the station.
  • the small station identification information includes small station coverage information.
  • the small station coverage information includes small station address location information and/or small station service area identification information.
  • the UE periodically reporting Mobile information is sent to the macro station, and the mobile information is used to determine an alternate niche of the UE.
  • the present invention provides a small station communication method, where the method is applied to a heterogeneous network, where the heterogeneous network includes a macro station, and the macro station covers at least one small station, and the method includes:
  • the macro station establishes a connection with a user equipment UE that enters the coverage area of the macro station, and performs data transmission with the UE.
  • the macro station determines an alternate station of the UE from the at least one small station.
  • the macro station transmits pre-configuration information of the candidate small station of the UE to the UE, and the pre-configuration information includes small station identification information and small station connection information.
  • the small station identification information is used by the UE to determine a small station to be accessed in the candidate small station, and the small station connection information is used for establishing a connection between the UE and the small station to be accessed.
  • the method further includes: after the UE establishes a connection with the small station to be accessed, the macro station schedules the UE and the access small Data transfer between stations.
  • the macro station determines that the UE has left the accessed small station, and terminates scheduling the UE and the Transmitting data transmission between the accessed small stations, and sending a message to the accessed small station, instructing the accessed small station to release the context of the UE.
  • the determining, by the macro station, that the UE has left the accessing station includes: receiving, by the macro station, a MAC CE message that is sent by the UE and carrying a release indication, according to the The MAC CE message determines that the UE has left the visited station.
  • the determining, by the macro station, that the UE has left the accessed small station includes: when the macro station continuously schedules the UE and the accessed small station The data transmission between the two fails, and it is determined that the UE has left the accessed station.
  • the pre-configuration information further includes a connection validity time of the candidate small station of the UE, where the method further includes: when the UE is connected to the The connection time of the small station exceeds the connection validity time, the macro station terminates scheduling data transmission between the UE and the accessed small station, and sends a message to the accessed small station, indicating the The accessed small station releases the context of the UE.
  • the present invention provides a macro station, which is used in a heterogeneous network, where the macro station includes the macro station, and the macro station covers at least one small station, and the macro station includes:
  • the connection transmission module is configured to establish a connection with a user equipment UE that enters the coverage area of the macro station, and perform data transmission with the UE.
  • Small station selection module an alternative station for determining the UE from the at least one small station.
  • the sending module is configured to send the pre-configuration information of the candidate small station to the UE, where the pre-configuration information includes the small station identification information and the small station connection information.
  • the small station identification information is used by the UE to determine a small station to be accessed in the candidate small station, and the small station connection information is used for establishing a connection between the UE and the small station to be accessed.
  • the macro station further includes: a data scheduling module, configured to: after the UE establishes a connection with the small station to be accessed, scheduling the UE and accessing Data transfer between small stations.
  • a data scheduling module configured to: after the UE establishes a connection with the small station to be accessed, scheduling the UE and accessing Data transfer between small stations.
  • the data scheduling module is further configured to: determine that the UE has left the accessed small station, and terminate the scheduling office Transmitting a data transmission between the UE and the accessed small station, and sending a message to the accessed small station, indicating that the access of the station releases the context of the UE.
  • the data scheduling module further includes:
  • the CE message receiving unit is configured to receive a MAC CE message that is sent by the UE and that carries the release indication.
  • the data scheduling module is further configured to: according to the received MAC CE message, determine that the UE has left the accessed small station.
  • the data scheduling module is further configured to: continuously schedule the data transmission failure of the UE and the accessed small station, and determine that the UE has left the access Small station.
  • the pre-configuration information further includes a connection validity time of the candidate small station of the UE, where the macro station further includes: a connection time measurement module, configured to measure the UE connection The time taken to enter the station; the data scheduling module is further configured to: when the connection time between the UE and the accessed station exceeds the connection validity time, terminate scheduling the UE and the access Data transmission between the small stations, and sending a message to the accessed small station, indicating that the accessed small station releases the station The context of the UE.
  • the small station selection The module further includes: a mobile information receiving unit, configured to receive mobile information reported by the UE periodically, where the mobile information is used to determine an alternate small station of the UE.
  • a mobile information receiving unit configured to receive mobile information reported by the UE periodically, where the mobile information is used to determine an alternate small station of the UE.
  • the present invention provides a user equipment UE, which is used in a heterogeneous network, where the heterogeneous network includes a macro station, and the macro station covers at least one small station, and the UE includes:
  • the connection transmission module is configured to access the macro station and perform data transmission with the macro station.
  • a receiving module configured to receive pre-configuration information of the candidate small station of the UE sent by the macro station, where the candidate small station of the UE is selected by the macro station, and the pre-configuration information includes Station identification information and station connection information.
  • the station determining module is configured to determine, in the candidate station, the station to be accessed according to the station identification information.
  • the small station access module is configured to establish a connection with the small station to be accessed according to the small station connection information.
  • the UE further includes: a release module, configured to release pre-configuration information of the small station accessed by the UE.
  • the small station access module includes: a MAC CE sending unit, configured to send a MAC CE message carrying a release indication to And the releasing module is further configured to: after the sending of the MAC CE message, release pre-configuration information of the small station accessed by the UE.
  • the pre-configuration information further includes a connection validity time of the candidate small station of the UE, where the UE further includes: a measuring module, configured to measure a time used by the UE to access the small station; the releasing module is further configured to: when the connection time between the UE and the accessed small station exceeds the effective time of the connection, release the Pre-configuration information of the accessed small station.
  • the UE further includes: And a mobile information reporting module, configured to report, to the macro station, mobile information, where the mobile information is used to determine an alternate small station of the UE.
  • a mobile information reporting module configured to report, to the macro station, mobile information, where the mobile information is used to determine an alternate small station of the UE.
  • the present invention provides a macro station, which is applied to a heterogeneous network, where the macro station includes the macro station, and the macro station covers at least one small station, and the macro station includes:
  • a processor configured to establish a connection with a user equipment UE that enters a coverage area of the macro station, and perform data transmission with the UE; and select, among the at least one small station, a small station that the user equipment UE may pass.
  • Transmitter configured to send pre-configuration information of the candidate small station of the UE to the UE, where the pre-configuration information includes small station identification information and small station connection information.
  • the small station identification information is used by the UE to determine a small station to be accessed in the candidate small station, and the small station connection information is used for establishing a connection between the UE and the small station to be accessed.
  • the processor is further configured to
  • the UE After establishing a connection with the small station to be accessed, the UE schedules data transmission between the UE and the accessed small station.
  • the processor is further configured to: determine that the UE has left the accessed small station, and terminate scheduling the UE Data transmission with the accessed small station, and sending a message to the accessed small station, instructing the accessed small station to release the context of the UE.
  • the macro station further includes: a receiver, configured to receive a MAC CE message that is sent by the UE and carries a release indication; and the processor is further configured to receive, according to the The MAC CE message determines that the UE has left the visited station.
  • the processor is further configured to: continuously schedule the data transmission failure of the UE and the accessed small station, and determine that the UE has left the accessed small station.
  • the pre-configuration information further includes a connection validity time of the candidate small station of the UE.
  • the macro station further includes: a timer, configured to measure, after the UE accesses the small station,
  • the processor is further configured to: if the time taken by the UE to access the small station exceeds the connection validity time, terminate scheduling data transmission between the UE and the accessed small station, And sending a message to the accessed small station, instructing the accessed small station to release the context of the UE.
  • the receiver Further, the method is configured to receive mobile information that is periodically reported by the UE, where the mobile information is used to determine an alternate small station of the UE.
  • the embodiment of the present invention provides a user equipment UE, which is applied to a heterogeneous network, where the heterogeneous network includes a macro station, and the macro station covers at least one small station, and the UE includes:
  • Receiver configured to receive pre-configuration information of a small station that the UE sends by the macro station, where the candidate small station is selected by the macro station from the at least one small station, where the pre-configuration information is included Station identification information and station connection information.
  • a processor configured to access the macro station, perform data transmission with the macro station; and determine, according to the small station identification information, a small station to be accessed in the candidate small station, according to the small station connection information Establishing a connection with the small station to be accessed.
  • the pre-configuration information further includes a connection validity time of the small station that the UE may pass; the UE further includes: a timer, configured to measure the UE access station The processor is further configured to: when the connection time between the UE and the accessed small station exceeds the connection validity time, release the pre-configuration information of the accessed small station.
  • the UE further includes: a transmitter, configured to send a MAC CE message carrying a release indication to the macro station; and the processor is further configured to: when the MAC After the CE message is sent, the pre-configuration information of the accessed station is released.
  • an embodiment of the present invention provides a network system, where the heterogeneous network includes a macro station, the macro station covers at least one small station, and the network system includes, according to claim 13-19 or claim 25. - macro station as described in claim 31; user equipment UE as claimed in claims 20-24 or 32-35.
  • the macro station first determines a small station in the coverage area of the macro station that the UE may pass, as an alternative station of the UE, and then pre-configures the candidate station.
  • the information is sent to the UE, and the UE determines the small station to be accessed and establishes a connection by using the received pre-configuration information.
  • the problem that the UE itself discovers the small station and reports the macro station takes a long time to ensure that the UE maintains the communication with the macro station, and can additionally obtain the data transmission service provided by the small station, thereby improving data throughput and optimizing UE performance. .
  • the technical method provided by the invention does not need to adopt the process that the UE discovers the small station and reports the macro station, and the macro station and the small station obtain communication and then return to the UE, but the macro station pre-configures the small station to the UE, and narrows the target of the small station.
  • the scope reduces the information interaction between the macro station and the small station, saves the time required for the small station to establish a connection with the UE, increases the time that the small station can provide the data transmission service for the UE, and saves the energy consumption of the UE. Single, it will not significantly increase the cost of equipment, and at the same time, it can achieve the purpose of ensuring the throughput of the UE.
  • FIG. 1 is a schematic diagram of a heterogeneous network networking
  • FIG. 2 is a flowchart of a small station communication method according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of a small station communication method according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a small station communication method according to another embodiment of the present invention
  • FIG. 3 is a flowchart of a small station communication method according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a small station communication method according to another embodiment of the present invention
  • FIG. 3 is a flowchart of a small station communication method according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a small station communication method according to another embodiment of the present invention
  • FIG. 5 is a flowchart of a small station communication method according to still another embodiment of the present invention.
  • FIG. 6 is a flowchart of a small station communication method according to another embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a macro station according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a user equipment UE according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of a macro station according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a user equipment UE according to an embodiment of the present invention. detailed description
  • HetNet heterogeneous network
  • the macro station determines the small station 1 to the small station 3 that the UE may pass in advance according to the mobile situation of the UE, and sends the pre-configuration information of the small station 1 to the small station 3 to the UE. It is convenient for the UE to select a small station in the small station that can provide an optimal service for establishing a connection and perform data transmission. In FIG. 1, the UE will first pass the coverage area of the small station 1, and the UE first accesses the small station 1 .
  • FIG. 1 is only a schematic diagram of a heterogeneous network.
  • the distribution, the specific location, and the number of the small and medium stations in the coverage area of the macro station need to be determined according to actual network networking requirements.
  • a small station communication method is applied to the heterogeneous network shown in Figure 1. Referring to Figure 2, the method flow includes:
  • the user equipment UE enters the macro station coverage area, establishes a connection with the macro station, and performs data transmission.
  • the UE receives pre-configuration information of the candidate small station of the UE that is sent by the macro station, where the pre-configuration information includes small station identification information and small station connection information.
  • the alternative station is selected by the macro station in the at least one station.
  • the UE may pass the coverage of at least one small station in the coverage area of the macro station, and the small station is a small station that the UE may pass, that is, an alternate access station of the UE.
  • the small station identification information refers to the information used to identify 'j, the station, in the process of determining the access, the UE can determine whether the small station is pre-configured by the small station identification information. .
  • the small station identification information includes small station coverage information, such as small station address location information or/and small station service area identification information.
  • the small station coverage information further includes a small station coverage radius or/and Small station transmission power, etc.
  • the small station identification information may further include a cell identity (cell ID) and a small station working frequency band, which are used to assist in realizing cell positioning.
  • the small station connection information is used to establish a connection with the small station. Further, the small station connection information may also be used for a data transmission process after the small station establishes a connection with the UE, and the UE and the small station may be implemented. Fast connection and synchronous communication.
  • the small station connection information may include: a dedicated physical random access channel (PRACH) resource of the small station, where the UE sends a random access request to the small station.
  • the small station connection information may further include a radio bearer (RB) of the small station, a physical layer configuration, and a media access control (MAC) layer configuration, configured for establishing the UE and the small station.
  • PRACH dedicated physical random access channel
  • MAC media access control
  • the small station may be according to the requirement of the UE or Proactively send the above configuration information.
  • the information required for the UE to access the small station is sent by the macro station to the UE in a pre-configured manner, which reduces the information interaction between the UE and the small station, improves data transmission efficiency, and saves energy consumption of the UE.
  • the UE After receiving the pre-configuration information, the UE determines, according to the small station identification information, a small station to be accessed in the candidate small station.
  • the UE establishes a connection with the determined small station to be accessed according to the small station connection information. Further, after accessing the small station, the UE may acquire the communication service through the accessed small station.
  • the embodiment of the present invention further provides a small station communication method.
  • the method flow includes: 201: A macro station establishes a connection with a user equipment UE that enters a coverage area of the macro station, and performs data transmission. 202: The macro station selects an alternate station that determines the UE from the small stations in the coverage area.
  • the macro station sends pre-configuration information of the candidate small station of the UE to the UE, where the pre-configuration information includes the small station identification information and the small station connection information.
  • the small station identification information is used by the UE to determine a small station to be accessed in the candidate small station, and the small station connection information is used to establish a connection between the UE and the small station to be accessed.
  • the above two embodiments of the present invention pre-configure the small station that the UE in the macro station coverage area may be pre-configured to the UE by the macro station determining the small station that the UE may pass, and transmitting the pre-configuration information of the small station to the UE.
  • the UE does not need to discover the small station and report the macro station, which reduces the time required for the UE to establish a connection with the small station, and can also increase the time for the small station to provide the service for the UE. Even if the UE is in a high-speed motion, the method provided by the embodiment of the present invention can still effectively access the small station and obtain the communication service provided by the small station.
  • the embodiment of the present invention further provides a small station communication method. Referring to FIG. 4, the method flow is as follows:
  • the macro station establishes a connection with the user equipment UE that enters the coverage area of the macro station and performs data transmission.
  • the macro station selects a small station that the UE may pass as the candidate small station of the UE, and sends the preset configuration information of the candidate small station to the UE, where the macro station is located in the at least one small station.
  • the pre-configuration information includes small station identification information and small station connection information.
  • the macro station determines that the small station that the UE may pass may have three modes: 3021 -3023:
  • the UE reports the mobile information to the macro station, and the macro station determines the small station that the UE may pass.
  • the UE may periodically report the mobile information, and may also report the mobile information based on the event trigger.
  • the moving information to the macro station may be moving direction information or moving track information. After receiving the moving direction information or moving track information reported by the UE, the macro station may estimate the moving direction information or the moving track information according to the moving direction information or the moving track information. The location change of the UE is described, and according to the geographical location information of the small station within the coverage of the macro station, the small station that the UE may pass is determined, and the candidate small station is determined.
  • the mobile information reported by the UE may further include the mobile speed information
  • the macro station may further determine, according to the moving speed information, the time when the UE arrives at the candidate small station, and may determine, according to the time, when the candidate small station is to be Pre-configuration information is sent to the UE. or;
  • the macro station determines a small station that the UE may pass based on the navigation information reported by the UE after establishing a connection with the macro station.
  • the UE may also report the navigation information of the UE to the macro station, where the navigation information may be the current location and destination of the UE.
  • the UE may send the navigation information of the UE to the macro station.
  • the macro station may estimate the moving path of the UE according to the location information and the destination information of the UE. And determine the small station that the UE may pass on the way.
  • GPS global positioning system
  • the macro station locates the location and speed of the UE based on the positioning algorithm, and determines a small station that the UE may pass.
  • the UE does not need to report the mobile information or the navigation information to the macro station, but the macro station actively locates the UE, learns the mobile path of the UE from the location and speed of the UE, and determines the small station that the UE may have performed.
  • the method for determining an alternate small station of the UE by using any one of 3021-3023 may reduce information interaction between the UE and the small station, between the macro station and the small station during the process of determining the small station ready for access by the UE, Shortened
  • the macro station sends the pre-configuration information of the candidate small station of the UE to the UE, where the pre-configuration information includes the small station identification information and the small station connection information.
  • Step 3031-3036 After receiving the pre-configuration information, the UE determines the small station to be accessed, measures the signal quality of the small station to be accessed, and establishes a connection with the small station whose signal quality meets the communication service condition. Obtain the communication services provided by the accessing stations, including:
  • the UE After receiving the pre-configuration information of the candidate small station sent by the macro station, the UE determines, according to the small station identification information, the small station to be accessed.
  • the UE may learn the specific location of the candidate small station according to the small station address location information or the small station service area identification information in the small station identification information. And determining a relative distance between the UE and the candidate small station according to the current location of the UE, and selecting an alternate small station with the closest relative distance as the small station to be accessed.
  • the UE measures the signal quality of the small station to be accessed.
  • the signal quality of the small station that establishes the connection with the UE needs to meet the service requirement. Therefore, after determining the small station to be accessed, the UE needs to determine whether the signal quality of the small station to be accessed can provide normal communication service for the UE. . For example, the UE may determine whether the signal quality of the small station to be accessed is satisfied by measuring RSRP (Reference Signal Receiving Power) or RSRQ (Reference Signal Receiving Quality) of the small station. Service requirements.
  • RSRP Reference Signal Receiving Power
  • RSRQ Reference Signal Receiving Quality
  • two signal quality thresholds are set, which are respectively a first threshold value and a second threshold value, where the first threshold value is smaller than the second threshold value, when the measured preparation is small
  • the signal quality value of the station is less than the first threshold, and the UE cannot establish a connection with the small station; when the measured signal quality value of the small station to be accessed is greater than or equal to the first threshold and less than the second threshold
  • the value the UE can access the small station, but the small station can not provide normal communication service for the UE; when the measured signal quality value of the small station to be accessed is greater than or equal to the second threshold, the small station can Provide normal communication services for the UE.
  • the second threshold is the lowest value of the RSRP or RSRQ that the UE can communicate with the small station.
  • the value - ⁇ can be determined according to the network statistics, or the experience value can be arbitrarily selected according to actual needs. For example, if the RSRP of the UE and the small station can communicate normally is -30db, the second threshold is -30db, and the first threshold is -35db. When the RSRP of the small station reaches -35db, the UE is close to the small station. , a random access request can be sent to the small station, but normal communication cannot be performed yet.
  • Both the access request and the response transmission have a delay, so before the UE measures that the small station signal quality satisfies the normal communication requirement, that is, the UE sends a random access request to the small station before completing the small station coverage area completely, and completes the random access request with the small station.
  • the small station can provide services to the UE immediately after it enters the coverage of the station.
  • the UE may use the dedicated PRACH resource included in the small station connection information in the pre-configuration information of the small station to the small The station initiates a random access request.
  • the small station that the UE prepares to access feeds back a random access response (RAR) to the UE.
  • RAR random access response
  • the embodiment of the present invention may further include steps 3035-3036, specifically:
  • the macro station schedules data transmission between the UE and the small station after receiving the message that the UE has accessed the small station.
  • the macro station may use a macro station central scheduling mode to schedule data transmission between the UE and the accessed small station.
  • the macro station uniformly allocates the time-frequency resources required by the macro station and the small station in the data transmission process of the small station and the UE, and can better perform interference coordination; meanwhile, the data required by the UE is backed up by the macro station after being backed up on the macro station.
  • the small station is sent directly to the UE via the small station, and no small station is required to schedule data transmission between itself and the UE. After the UE leaves the small station, the small station does not need to transmit the remaining data back to the macro station, thereby avoiding the macro station. Repeated data interaction with the small station.
  • the method in this embodiment may further include steps 3041-3044.
  • Steps 3041-3044 After leaving the accessed small station coverage area, the UE releases the pre-configuration information of the accessed small station.
  • the UE may terminate the connection with the small station by deleting the received pre-configuration information of the accessed small station, and release the storage space.
  • the UE sends a MAC layer control message MAC CE (control element) to the macro station based on the judgment that the user is about to leave the small station coverage area, and notifies the macro station to terminate the data scheduling.
  • the determining method may be: the UE determines whether it is about to leave the small station coverage area by its current location; or the UE measures the signal quality of the already accessed small station, and if the measured signal quality value is less than the signal quality threshold, The UE can judge that it is about to leave the small station coverage area.
  • the MAC CE message transmission is delayed, by transmitting the MAC CE message in advance, it can ensure that the UE can release the pre-configuration information of the small station immediately after leaving the coverage area of the small station, and accordingly, the macro station can immediately terminate the scheduling station and the UE.
  • the data is transmitted between and indicates that the small station releases the UE context, thereby achieving a quick release between the UE and the small station.
  • Steps 3041-3044 can be specifically:
  • the UE predicts a small station that is about to leave the access based on the current location or the signal quality measurement result of the small station that has been accessed.
  • the UE sends a MAC CE message carrying a release indication to the macro station, and instructs the macro station to send a message for releasing the UE context to the accessed small station.
  • the UE releases the pre-configured information of the accessed small station.
  • the macro station After receiving the foregoing MAC CE message, the macro station terminates scheduling data transmission between the UE and the accessed small station, and sends a message to the accessed small station, instructing the small station to release the UE context.
  • Steps 3041-3044 can be used to quickly terminate the connection between the UE and the small station, thereby realizing rapid recovery of resources on the network side and saving UE energy consumption.
  • a small station communication method is provided. Referring to FIG. 5, steps 401, 4021-4024, and 4031-4036 refer to step 301 in the embodiment shown in FIG. 3021-3024, 3031-3036;
  • the macro station continuously performs N times (N>2, N is an integer).
  • the data transmission between the UE and the accessed small station is unsuccessful.
  • the macro station schedules the UE uplink data, but the small station does not receive the uplink data, and the macro station does not receive the acknowledgement message sent by the small station, or the macro station continuously sends the downlink data to the small station, and the small station sends the uplink data to the UE.
  • the small station fails to transmit, it can be considered that the UE has left the accessed small station.
  • the UE releases the pre-configured information of the received small station.
  • the macro station terminates scheduling data transmission between the UE and the accessed small station, and sends a message to the accessed small station, instructing the small station to release the UE context.
  • the macro station determines the data transmission between the UE and the small station to terminate the data transmission between the UE and the small station, and ensures that the UE does not send the MAC on the premise of realizing the fast connection between the UE and the small station.
  • the CE message or the MAC CE message fails to be transmitted, the UE and the small station can still achieve a fast release.
  • a small station communication method is provided. Referring to FIG. 6, wherein steps 501, 5021-5023, and 5031-5036 refer to steps 301, 3021-3023 in the embodiment shown in FIG. , 3031-3036;
  • step 5024 the macro station sends the pre-configuration information of the candidate small station of the UE to the UE, and the small station pre-configuration information further includes the connection effective time of the small station.
  • connection validity time may be previously sent to the macro station by the small station before the UE has not accessed the macro station; or may be determined by the macro station according to the moving speed of the UE, where the moving speed of the UE is faster The shorter the connection effective time of the small station can be set, and the slower the moving speed of the UE, the longer the connection effective time of the small station can be set.
  • the connection validity time of the small station may be determined according to statistical values of the network or determined according to empirical values. For example, the effective time can be set to 10ms.
  • steps 5041-5043 can be:
  • the UE and the macro station respectively measure whether the connection time between the UE and the accessed small station exceeds the connection effective time of the small station, where the UE starts to measure after receiving the RAR of the small station; and the small station feeds back the RAR to the UE. Sending a message to the macro station indicating that the UE has accessed, and the macro station starts measuring after receiving the indication message.
  • connection time between the UE and the accessed small station exceeds the validity time of the connection, the UE actively releases the accessed pre-configuration information of the station.
  • connection time between the UE measured by the macro station and the accessed small station exceeds the connection validity time, the macro station automatically terminates the data transmission between the scheduled UE and the accessed small station, and sends the data transmission to the small station. A message indicating that the station releases the UE context.
  • the embodiment of the present invention sets the connection effective time of the small station and sends it to the UE as a component of the pre-configuration information.
  • the connection time between the UE and the small station exceeds the effective time of the connection, the default UE has left the accessed small station.
  • the UE actively releases the pre-configuration information of the accessed small station, and the macro station automatically terminates the data transmission between the scheduling small station and the UE, reduces information interaction between the UE and the macro station, and implements the UE and the accessed small station. Rapid release between networks to improve network productivity.
  • the embodiment of the present invention provides a macro station, which is applied to a heterogeneous network, where the heterogeneous network includes the macro station and at least one small station in the coverage area of the macro station. Referring to Figure 7, the macro station includes:
  • the connection transmission module 601 is configured to establish a connection with a user equipment UE that enters the coverage area of the macro station, and perform data transmission with the UE.
  • the station selection module 602 is configured to select, in the at least one small station, a small station that the UE may pass according to the motion trajectory of the UE, as an alternative station of the UE.
  • the sending module 603 is configured to send, to the UE, pre-configuration information of the candidate small station of the UE, where the pre-configuration information includes the small station identification information and the small station connection information.
  • the small station selection module 602 further includes a mobile information receiving unit 6021, configured to receive mobile information that is periodically reported by the UE, where the mobile information includes a moving direction information or a moving track of the UE.
  • the information may further include moving speed information of the UE.
  • the mobile information may be used by the macro station to determine a small station that the UE may pass as an alternative station for the UE.
  • the macro station further includes: a data scheduling module 604, configured to schedule data transmission between the UE and the accessed small station after the UE establishes a connection with the small station to be accessed.
  • a data scheduling module 604 configured to schedule data transmission between the UE and the accessed small station after the UE establishes a connection with the small station to be accessed.
  • the data scheduling module 604 is further configured to: determine that the UE has left the accessed small station, terminate data transmission between the scheduled UE and the accessed small station, and send a message to the small station, instructing the small station to release the UE Context.
  • the data scheduling module 604 There are two implementations for this function of the data scheduling module 604:
  • the first mode the data scheduling module 604 may be configured with a MAC CE message receiving unit 6041, configured to receive a MAC CE message that is sent by the UE and carry a release indication. If the MAC CE message is received, the UE may determine that the UE has left the connection. The incoming data station module 604 may terminate scheduling data transmission between the UE and the accessed small station, and send a message to the small station to instruct the small station to release the UE context.
  • the second mode the data scheduling module 604 schedules UE and small station data transmission unsuccessfully for N consecutive times (N>2, N is an integer), for example, the macro station schedules UE uplink data transmission, but the small station does not receive the Data, the macro station thus does not receive the acknowledgement message sent by the small station, or the macro station continuously sends the downlink data to the small station, and the small station sends the downlink data to the UE, but if the small station sends the downlink data unsuccessfully, the UE may be considered to have left the connection.
  • the incoming data station, the data scheduling module 604 automatically terminates the data transmission between the scheduling small station and the UE, and sends a message to the small station, instructing the small station to release the UE context.
  • the second method ensures that the UE and the small station can still achieve fast release without MAC CE signaling or MAC CE transmission failure.
  • the macro station may further include a connection time measurement module 605: configured to measure a time used by the UE to access the small station, in this embodiment, the sending station 603 sends an alternate station to the UE.
  • the pre-configuration information includes the connection validity time of the small station; the connection time measurement module 605 measures that the connection time between the UE and the accessed small station exceeds the validity time of the small station connection, and sends a message to the data scheduling.
  • the data scheduling module 604 then terminates the data transmission between the scheduling UE and the accessed small station.
  • the macro station shown in FIG. 7 provided by the embodiment of the present invention may be implemented by the small station communication method shown in FIG. 2-6.
  • the macro station shown in FIG. 7 can perform the small station communication method as shown in FIG. 2-6.
  • the embodiment of the present invention further provides a user equipment UE, where the UE includes: a connection transmission module 701: configured to access the macro station, and perform data transmission with the macro station.
  • the receiving module 702 is configured to: receive pre-configuration information of the candidate small station of the UE that is sent by the macro station, where the candidate small station of the UE is selected by the macro station from the at least one small station, where the pre-configuration information is Includes small station identification information and small station connection information.
  • the station determining module 703 is configured to determine, in the candidate station, the station to be accessed according to the station identification information.
  • the small station determining module 703 determines the small station to be accessed based on the small station identification information.
  • the specific location of the candidate small station may be obtained according to the small station address location information or the small station service area identifier information in the small station identification information, and the UE and the location are determined according to the current location of the UE. For the relative distance of the alternative stations, the alternative station with the closest relative distance is selected as the station to be accessed.
  • the small station access module 704 is configured to establish a connection with the small station to be accessed according to the small station connection information.
  • the small station access module 704 includes a small station signal quality measuring unit 7041 for measuring whether the signal quality of the small station to be accessed can provide a normal communication service for the UE.
  • the station access module 704 initiates a random access request to the station using the dedicated PRACH resource contained in the pre-configuration information of the station to be accessed.
  • the small station access module 704 may include: a MAC CE sending unit 7042, configured to send a MAC CE message carrying a release indication to the macro station, and specifically, the UE measures the signal quality based on the current location or the small station. As a result, the small station that is about to leave the access is predicted, and the MAC CE message carrying the release indication is sent to the macro station, and the macro station is instructed to send a message for releasing the UE context to the small station accessed by the UE.
  • a MAC CE sending unit 7042 configured to send a MAC CE message carrying a release indication to the macro station, and specifically, the UE measures the signal quality based on the current location or the small station.
  • the UE further includes a release module 705, which can be used to cancel the MAC CE. After the information transmission is completed, the pre-configuration information of the small station accessed by the UE is released.
  • the UE may further include: a mobile information reporting module 706, configured to report, to the macro station, the mobile information, where the mobile information includes: the mobile direction information or the mobile trajectory information of the UE, and may further include The mobile speed information of the UE, the mobile information may be used by the macro station to determine a small station that the UE may pass as an alternative small station of the UE.
  • a mobile information reporting module 706 configured to report, to the macro station, the mobile information, where the mobile information includes: the mobile direction information or the mobile trajectory information of the UE, and may further include The mobile speed information of the UE, the mobile information may be used by the macro station to determine a small station that the UE may pass as an alternative small station of the UE.
  • the pre-configuration information of the candidate small station received by the receiving module 702 further includes: a connection validity time of the small station; the UE may further include: a connection time measurement module 707, configured to measure the UE access The time spent after the station.
  • the connection time measurement module 707 measures that the connection time between the UE and the accessed small station exceeds the small station connection validity time, sends a message to the release module 705, and the release module 705 releases the stored location.
  • the UE shown in FIG. 8 provided by the embodiment of the present invention may be the UE in the embodiment of the small station communication method shown in FIG. 2-6, and the UE shown in FIG. 8 may perform the small station communication as shown in FIG. 2-6.
  • an embodiment of the present invention further provides a macro station, which is applied to a heterogeneous network, where the macro station includes the macro station, and the macro station covers at least one small station, and the macro station Includes:
  • the processor 801 is configured to establish a connection with a user equipment UE that enters the coverage area of the macro station, and perform data transmission with the UE, and select, in the at least one small station, a small station that the UE may pass, as the UE.
  • Alternative station a user equipment UE that enters the coverage area of the macro station.
  • Transmitter 802 configured to send pre-configuration information of the candidate small station of the UE to the UE, where the pre-configuration information includes small station identification information and small station connection information.
  • the processor 801 may be further configured to: after the UE establishes a connection with the small station to be accessed, schedule data transmission between the UE and the accessed small station.
  • the processor 801 may be further configured to: determine that the UE has left the accessed small station, terminate data transmission between the scheduled UE and the accessed small station, and send a message to the small station, instructing the small station to release the UE Context.
  • the first mode is: setting a receiver 803 in the macro station, configured to receive a MAC CE message that is sent by the UE and carries a release indication. If the receiver 803 receives the MAC CE message, it may be determined that the UE has left the connection. The incoming station may terminate the scheduling of data transmission between the UE and the accessed station.
  • the second mode the processor 801 schedules the data transmission and reception failure of the UE and the accessed small station for N consecutive times (N>2, N is an integer), determines that the UE has left the accessed small station, and terminates the scheduling. Data transmission between the UE and the small station.
  • the macro station further includes: a timer 804, configured to measure a time used by the UE to access the small station, in this embodiment, the alternate small station pre-configuration sent by the transmitter 801
  • the information also includes the effective time of the connection to the station.
  • the timer 804 measures that the connection time between the UE and the accessed small station exceeds the validity time of the small station connection, sends a message to the processor 801, and the processor 801 then terminates scheduling the UE and accesses.
  • the receiver may be configured to: receive mobile information that is periodically reported by the UE, where the mobile information includes: the mobile direction information or the mobile trajectory information of the UE, and further includes a moving speed information of the UE, where The mobile information can be used by the macro station to determine the small station that the UE may pass as an alternative station for the UE.
  • the macro station shown in FIG. 9 provided by the embodiment of the present invention may be a macro station in the embodiment of the small station communication method shown in FIG. 2-6, and the macro station shown in FIG. 9 may perform the method shown in FIG. 2-6.
  • the embodiment of the present invention further provides a user equipment UE, which is applied to a heterogeneous network, where the heterogeneous network includes a macro station, and the macro station covers at least one small station.
  • the UE includes:
  • the receiver 901 is configured to receive pre-configuration information of a small station that the UE sends by the macro station, where the candidate small station is selected by the macro station from the at least one small station, where the pre-configuration information is used. Including small station identification information and small station connection information;
  • the processor 902 is configured to access the macro station, perform data transmission with the macro station, and determine, according to the small station identification information, a small station to be accessed in the candidate small station, according to the small station
  • the station connection information establishes a connection with the small station to be accessed.
  • the UE further includes: a transmitter 903, configured to send a MAC CE message carrying a release indication to the macro station, and specifically, the transmitter predicts to leave based on the current location of the UE itself or the signal quality measurement result of the small station.
  • the accessed small station sends a MAC CE message carrying a release indication to the macro station, instructing the macro station to send a message for releasing the UE context to the accessed small station.
  • the processor 902 is further configured to: after the MAC CE message is successfully sent, release the pre-configuration information of the small station accessed by the UE.
  • the transmitter 903 may be further configured to report the mobile information to the macro station, where the mobile information includes: the mobile direction information or the mobile trajectory information of the UE, and further includes the mobile speed information of the UE.
  • the mobile information may be used by the macro station to determine a small station that the UE may pass as an alternative small station of the UE.
  • the UE further includes: a timer 904, configured to measure a time used after accessing the small station; in this embodiment, the pre-configured information of the candidate small station received by the receiver 901 is further The method includes: a connection validity time of the small station; the timer 904 measures that the connection time between the UE and the accessed small station exceeds the validity time of the small station connection, and sends a message to the processor 902, where the processing is performed. The 902 releases the station pre-configuration information accessed by the UE.
  • the UE shown in FIG. 10 provided by the embodiment of the present invention may be the UE in the embodiment of the small station communication method shown in FIG. 2-6, and the UE shown in FIG. 10 may perform the small station communication as shown in FIG. 2-6.
  • the embodiment of the present invention further provides a network system, including the macro station in the foregoing embodiment shown in FIG. 7 or FIG. 9, and the user equipment in the embodiment shown in FIG. 8 or FIG. 10, and the macro in the network system.
  • the station and the user equipment can be arbitrarily combined.
  • the macro station shown in FIG. 7 and the user equipment shown in FIG. 8 can be used; or the macro station shown in FIG.
  • FIG. 9 and the user equipment shown in FIG. 10 are not limited.
  • Macro station and user setting in the network system The macro station and the user equipment described in the embodiment of the small station communication method shown in FIG. 2-6 can be executed, and the small station communication method shown in FIG. 2-6 can be executed.
  • FIG. 2-6 Specific method embodiments are shown, and details are not described herein again.
  • the above two embodiments of the present invention pre-configure the small station that the UE in the macro station coverage area may be pre-configured to the UE by the macro station determining the small station that the UE may pass, and transmitting the pre-configuration information of the small station to the UE.
  • the UE does not need to discover the small station and report the macro station, which reduces the time required for the UE to establish a connection with the small station, and can also increase the time for the small station to provide the service for the UE. Even if the UE is in a high-speed motion, the method provided by the embodiment of the present invention can still effectively access the small station and obtain the communication service provided by the small station.
  • the data throughput of the UE is improved, and the energy consumption of the UE is saved.
  • the disclosed apparatus and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the modules is only a logical function division.
  • there may be another division manner for example, multiple modules or components may be combined or Can be integrated into another device, or some features can be ignored, or not executed.
  • each functional module in each embodiment of the present invention may be integrated into one processing module, and each module may exist physically separately, or two or more modules may be integrated into one module.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable medium.
  • the storage medium to which it is obtained may be a read only memory, a magnetic disk or an optical disk or the like.

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Abstract

本发明实施例提供了一种小站通信方法、设备和系统，应用于异构网中，所述异构网中包括宏站，所述宏站覆盖至少一个小站。用户设备UE接入宏站，并与宏站进行数据传输；所述UE接收所述宏站发送的所述UE的备选小站的预配置信息，所述备选小站由宏站从覆盖区域内的至少一个小站中选择得到，所述预配置信息中包括小站识别信息以及小站连接信息；所述UE根据所述预配置信息确定准备接入的小站并建立连接。本发明实施例提供的技术方案能够使得高速移动的UE快速接入小站，从小站获得额外的通信服务，同时节约UE能耗，实现简单，不会明显增加设备成本。

Description

小站通信方法、 设备和系统
技术领域
本发明实施例涉及无线通信领域， 尤其涉及一种小站通信方法、 设备与系 统。 背景技术
随着通信及信息技术的日益发展， 用户对数据传输业务的容量、 质量和深 度覆盖的需求更加强烈。 为了给用户设备（user equipment, UE )提供更好的性 能， 以及分流宏网络的流量负荷， 第 4代通信系统在原有的第 2/2.5、 第 3代通信 系统使用的同构网络 ( homogeneous network ) 基础上提出了一种异构网 ( heterogeneous network, HetNet )组网场景， 在该场景下， 宏站负责广覆盖， 所 覆盖的区域称为宏小区 （macro cell ) , 以满足移动性及无缝覆盖的需求； 小站 用于对宏站覆盖的补充， 可以根据流量分布和无缝覆盖的要求， 灵活部署于热 点、 盲点、 小区边缘甚至室内区域， 提供网络的深度覆盖和容量扩充。 小站所 覆盖的较小热点区域称为微小区或小小区 （small cell ) 。
在现有技术中， 若要为 UE增加小小区服务， 需要通过 UE自行发现小站， 并 采取触发、 配置、 激活、 测量、 上报等流程后才能接入小站， 需要花费较长时 间。 由于小站覆盖区域较小 （例如半径 50米） ， 如果 UE处于高速移动状态， UE 在小站里面停留的时间将很短暂， 等到 UE接入小站， 并希望获取小站提供服务 时， UE可能已经开始离开小站的覆盖范围， 这就导致高速移动的 UE无法利用小 站的服务。 发明内容
本发明实施例提供了一种应用于异构网场景下的小站通信方法、 设备与系 统， 使得高速移动的 UE能够从小站获得额外的通信服务。 第一方面， 本发明提供了一种小站通信方法， 该方法应用于异构网中， 所 述异构网中包括宏站， 所述宏站覆盖至少一个小站， 该方法包括：
用户设备 UE接入所述宏站， 与所述宏站进行数据传输。
所述 UE接收所述宏站发送的所述 UE的备选小站的预配置信息， 所述 UE的 备选小站由宏站从所述至少一个小站中选择得到， 所述预配置信息中包括小站 识别信息以及小站连接信息。
所述 UE根据所述小站识别信息在所述备选小站中确定准备接入的小站。 所述 UE根据所述小站连接信息与所述准备接入的小站建立连接。
在第一方面的第一种可能的实现方式中， 所述预配置信息还包括所述备选 小站的连接有效时间； 所述方法还包括： 当所述 UE与接入的小站的连接时间超 过所述连接有效时间， 所述 UE释放所述接入的小站的预配置信息。
在第一方面的第二种可能的实现方式中， 所述方法还包括： 所述 UE发送携 带释放指示的 MAC层控制 MAC CE消息给所述宏站； 所述 UE释放所述接入的小 站的预配置信息。
在第一方面的第三种可能的实现方式中， 所述小站识别信息包括小站覆盖 信息。
在第一方面的第三种可能的实现方式中， 所述小站覆盖信息包括小站地址 位置信息和 /或小站服务区域标识信息。
结合第一方面， 第一方面的第一种可能的实现方式、 第二种可能的实现方 式或第三种可能的实现方式， 第一方面的第四种可能的实现方式， 所述 UE周期 上报移动信息给所述宏站， 所述移动信息用以确定所述 UE的备选小站。 第二方面， 本发明提供了一种小站通信方法， 该方法应用于异构网中， 所述异构网中包括宏站， 所述宏站覆盖至少一个小站， 该方法包括：
所述宏站与进入所述宏站覆盖区域的用户设备 UE建立连接， 并与所述 UE进 行数据传输。 所述宏站从所述至少一个小站中确定所述 UE的备选小站。
所述宏站将所述 UE的备选小站的预配置信息发送给所述 UE,所述预配置信 息包括小站识别信息以及小站连接信息。
所述小站识别信息用于所述 UE在所述备选小站中确定准备接入的小站， 所 述小站连接信息用于 UE与所述准备接入的小站建立连接。
在第二方面的第一种可能的实现方式中， 所述方法还包括， 在所述 UE与所 述准备接入的小站建立连接后， 所述宏站调度所述 UE与接入的小站之间的数据 传输。
结合第二方面的第一种可能的实现方式， 第二方面的第二种可能的实现方 式， 所述宏站判断所述 UE已经离开所述接入的小站， 终止调度所述 UE与所述接 入的小站之间的数据传输， 并向所述接入的小站发送消息， 指示所述接入的小 站释放所述 UE的上下文。
在第二方面的第二种可能的实现方式中， 所述宏站判断 UE已经离开所述接 入的小站包括： 所述宏站收到 UE发送的携带释放指示的 MAC CE消息， 根据所 述 MAC CE消息确定所述 UE已经离开所述接入的小站。
在第二方面的第二种可能的实现方式中， 述宏站判断所述 UE已经离开所述 接入的小站包括： 当所述宏站连续调度所述 UE与所述接入的小站之间的数据传 输失败， 确定所述 UE已经离开所述接入的小站。
在第二方面的第三种可能的实现方式中， 所述预配置信息还包括所述 UE的 备选小站的连接有效时间； 所述方法还包括： 当所述 UE与所述接入的小站的连 接时间超过所述连接有效时间， 所述宏站终止调度所述 UE与所述接入的小站之 间的数据传输， 并向所述接入的小站发送消息， 指示所述接入的小站释放所述 UE的上下文。 第三方面， 本发明提供了一种宏站， 应用于异构网中， 所所述异构网中包 括所述宏站， 所述宏站覆盖至少一个小站， 该宏站包括： 连接传输模块： 用于与进入所述宏站覆盖区域的用户设备 UE建立连接， 并 与所述 UE进行数据传输。
小站选择模块： 用于从所述至少一个小站中确定所述 UE的备选小站。
发送模块： 用于将所述备选小站的预配置信息发送给所述 UE, 所述预配置 信息包括小站识别信息以及小站连接信息。
所述小站识别信息用于所述 UE在所述备选小站中确定准备接入的小站， 所 述小站连接信息用于 UE与所述准备接入的小站建立连接。
在第三方面的第一种可能的实现方式中，该宏站还包括，数据调度模块， 用于在所述 UE与所述准备接入的小站建立连接后，调度所述 UE与接入的小站之 间的数据传输。
结合第三方面的第一种可能的实现方式， 第三方面第二种可能的实现方 式， 所述数据调度模块进一步用于， 判断所述 UE已经离开所述接入的小站， 终止调度所述 UE与所述接入的小站之间的数据传输， 并向所述接入的小站发送 消息， 指示所述接入的 ' j、站释放所述 UE的上下文。
在第三方面第二种可能的实现方式中，所述数据调度模块中还包括： MAC
CE消息接收单元， 用于接收 UE发送的携带释放指示的 MAC CE消息； 所述数据 调度模块进一步用于， 根据接收到的所述 MAC CE消息， 确定 UE已经离开所述 接入的小站。
在第三方面第二种可能的实现方式中， 所述数据调度模块进一步用于， 连续调度所述 UE与所述接入的小站数据传输失败， 确定所述 UE已经离开 所述接入的小站。
在第三方面第三种可能的实现方式中， 所述预配置信息还包括所述 UE的 备选小站的连接有效时间； 所述宏站还包括： 连接时间测量模块， 用于测量 UE 接入小站后所用的时间； 所述数据调度模块进一步用于： 当所述 UE与所述接入 的小站的连接时间超过所述连接有效时间， 终止调度所述 UE与所述接入的小站 之间的数据传输， 并向所述接入的小站发送消息， 指示所述接入的小站释放所 述 UE的上下文。
结合第三方面、 第三方面的第一种可能的实现方式、 第二种可能的实现 方式或第三种可能的实现方式， 第三方面的第四种可能的实现方式， 所述小 站选择模块还包括：移动信息接收单元，用于接收所述 UE周期上报的移动信息， 所述移动信息用以确定所述 UE的备选小站。 第四方面， 本发明提供了一种用户设备 UE, 用于异构网中， 所述异构网中 包括宏站， 所述宏站覆盖至少一个小站， 该 UE包括：
连接传输模块： 用于接入所述宏站， 与所述宏站进行数据传输。
接收模块： 用于接收宏站发送的 UE的备选小站的预配置信息， 所述 UE的备 选小站由宏站从所述至少一个小站中选择得到， 所述预配置信息中包括小站识 别信息以及小站连接信息。
小站判定模块： 用于根据所述小站识别信息在所述备选小站中确定准备接 入的小站。
小站接入模块： 用于根据所述小站连接信息与所述准备接入的小站建立连 接。
在第四方面的第一种可能的实施方式中， 所述 UE还包括： 释放模块， 用于 释放所述 UE接入的小站的预配置信息。
结合第四方面的第一种可能的实施方式， 第四方面的第二种可能的实施方 式，所述小站接入模块包括： MAC CE发送单元，用于发送携带释放指示的 MAC CE消息给所述宏站； 所述释放模块进一步用于： 在所述 MAC CE消息发送后， 释放所述 UE接入的小站的预配置信息。
结合第四方面的第一种可能的实施方式， 第四方面的第三种可能的实施方 式， 所述预配置信息还包括 UE的备选小站的连接有效时间； 该 UE还包括： 连接 时间测量模块， 用于测量所述 UE接入小站后所用的时间； 所述释放模块进一步 用于， 当所述 UE与所述接入的小站的连接时间超过所述连接有效时间， 释放所 述接入的小站的预配置信息。
结合第四方面、 第四方面的第一种可能的实施方式、 第二种可能的实施方 式或第三种可能的实施方式，第四方面的第四种可能的实施方式，该 UE还包括： 移动信息上报模块， 用于向所述宏站周期上报移动信息， 所述移动信息用以确 定所述 UE的备选小站。 第五方面， 本发明提供了一种宏站， 应用于异构网中， 所述异构网中包括 所述宏站， 所述宏站覆盖至少一个小站， 该宏站包括：
处理器： 用于与进入所述宏站覆盖区域的用户设备 UE建立连接， 并与所述 UE进行数据传输； 以及在所述至少一个小站中选择用户设备 UE可能经过的小站。
发送器： 用于将所述 UE的备选小站的预配置信息发送给所述 UE, 所述预配 置信息包括小站识别信息以及小站连接信息。
所述小站识别信息用于所述 UE在所述备选小站中确定准备接入的小站， 所 述小站连接信息用于 UE与所述准备接入的小站建立连接。
在第五方面的第一种可能的实施方式中， 所述处理器进一步用于，在所述
UE与所述准备接入的小站建立连接后，调度所述 UE与接入的小站之间的数据传 输。
结合第五方面的第一种可能的实施方式， 第五方面的第二种可能的实施 方式， 所述处理器进一步用于， 判断 UE已经离开所述接入的小站， 终止调度所 述 UE与所述接入的小站之间的数据传输， 并向所述接入的小站发送消息， 指示 所述接入的小站释放所述 UE的上下文。
在第五方面的第二种可能的实现方式中， 该宏站还包括： 接收器， 用于 接收所述 UE发送的携带释放指示的 MAC CE消息； 所述处理器进一步用于， 根 据接收到的所述 MAC CE消息， 确定 UE已经离开所述接入的小站。
在第五方面的第二种可能的实现方式中， 所述处理器进一步用于， 连续调 度所述 UE与接入的小站数据传输失败， 确定 UE已经离开所述接入的小站。 在第五方面的第三种可能的实现方式中， 所述预配置信息还包括 UE的备 选小站的连接有效时间； 该宏站还包括： 计时器， 用于测量 UE接入小站后所用 的时间； 所述处理器进一步用于： 若所述 UE接入小站后所用的时间超过所述连 接有效时间， 终止调度所述 UE与所述接入的小站之间的数据传输， 并向所述接 入的小站发送消息， 指示所述接入的小站释放所述 UE的上下文。
结合第五方面， 第五方面的第一种可能的实现方式、 第二种可能的实现 方式或第三种可能的实现方式， 第五方面的第四种可能的实现方式， 所所述 接收器进一步用于， 接收所述 UE周期上报的移动信息， 所述移动信息用以确定 所述 UE的备选小站。 第六方面， 本发明实施例提供了一种用户设备 UE, 应用于异构网中， 所述 异构网中包括宏站， 所述宏站覆盖至少一个小站， 该 UE包括：
接收器： 用于接收宏站发送的 UE可能经过的小站的预配置信息， 所述 UE的 备选小站由宏站从所述至少一个小站中选择得到， 所述预配置信息中包括小站 识别信息以及小站连接信息。
处理器： 用于接入所述宏站， 与所述宏站进行数据传输； 以及根据所述小 站识别信息在所述备选小站中确定准备接入的小站， 根据小站连接信息与所述 准备接入的小站建立连接。
在第六方面的第一种可能的实现方式中， 所述预配置信息还包括 UE可能经 过的小站的连接有效时间； 该 UE还包括： 计时器， 用于测量所述 UE接入小站后 所用的时间； 所述处理器进一步用于， 当所述 UE与所述接入的小站的连接时间 超过所述连接有效时间， 释放所述接入的小站的预配置信息。
在第六方面的第二种可能的实现方式中， 该 UE还包括： 发送器， 用于发送 携带释放指示的 MAC CE消息给所述宏站；所述处理器进一步用于，当所述 MAC CE消息发送后， 释放所述接入的小站的预配置信息。
结合第六方面的第二种可能的实现方式， 第六方面的第三种可能的实现方 式， 所述发送器进一步用于， 向宏站周期上报移动信息， 所述移动信息用以确 定所述 UE的备选小站。 第七方面， 本发明实施例提供了一种网络系统， 所述异构网中包括宏站， 所述宏站覆盖至少一个小站， 所述网络系统包括， 权利要求 13-19或权利要求 25-31所述的宏站； 权利要求 20-24或权利要求 32-35所述的用户设备 UE。 通过本发明实施例公开的方法、 设备及系统， 首先由宏站确定 UE可能经过 的宏站覆盖区域内的小站， 作为 UE的备选小站， 随后将所述备选小站的预配置 信息发送给 UE, UE利用收到的预配置信息确定准备接入的小站并建立连接。 解 决了由 UE自行发现小站并上报宏站过程消耗时间长的问题，保证 UE在与宏站保 持通信之外， 能够额外获得小站提供的数据传输服务， 从而提升数据吞吐量， 优化 UE性能。 本发明提供的技术方法无需采用 UE自行发现小站并报告宏站， 由 宏站与小站取得通信再返回 UE的流程， 而是由宏站预配置小站给 UE, 缩小了小 站的目标范围， 减少了宏站与小站之间的信息交互， 节约小站与 UE建立连接所 需的时间， 增加了小站能够为 UE提供数据传输服务的时间， 并能节约 UE能耗， 实现筒单， 不会明显增加设备成本， 同时可以达到保证提升 UE吞吐量的目的。
上述发明内容将清楚体现在以下对具体实施方式的描述中。 附图说明
为了更清楚地说明本发明实施例中的技术方案， 下面将对实施例描述中 所需要使用的附图作筒单地介绍，显而易见地， 下面描述中的附图仅仅是本发 明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造性劳动的前 提下,还可以根据这些附图获得其他的附图。
图 1为一种异构网组网示意图；
图 2为本发明实施例提供的一种小站通信方法流程图；
图 3为本发明实施例提供的一种小站通信方法流程图； 图 4为本发明又一实施例提供的一种小站通信方法流程图；
图 5为本发明再一实施例提供的一种小站通信方法流程图；
图 6为本发明另一实施例提供的一种小站通信方法流程图；
图 7为本发明实施例提供的一种宏站示意图；
图 8为本发明实施例提供的一种用户设备 UE的示意图；
图 9为本发明实施例提供的一种宏站示意图；
图 10为本发明实施例提供的一种用户设备 UE的示意图。 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详细描述。
图 1为一种异构网 （HetNet )组网场景的实施例， 在该实施例中， 包括 一个宏站 （ macro base-station ) , 以及所述宏站覆盖范围内的至少一个小站 ( micro base-station ) , 如小站 1-小站 5。 当高速移动的用户设备 ( user equipment, UE ) 进入宏站覆盖区域后， 首先与宏站建立连接并进行数据传 输， UE按其运动轨迹经过宏站区域内的某些小站， 如图 1中 UE将经过小站 1 , 小站 2, 和小站 3。 为了使 UE快速获得小站提供的额外服务， 宏站根据 UE的移动情况提前确定 UE可能经过的小站 1-小站 3 ,并将小站 1-小站 3的 预配置信息发送给 UE,便于 UE在所述小站中选取能够为其提供最优服务的 小站， 建立连接并进行数据传输， 图 1 中， UE将首先经过小站 1 的覆盖区 域， 则 UE首先接入小站 1。
需要说明的是， 图 1仅为一种异构网组网示意图， 实际情况下， 宏站覆 盖区域内中小站的分布、 具体位置、 数量等需要根据实际网络组网需求确定 本发明实施例提供了一种小站通信方法， 应用于图 1所示异构网中， 参 见图 2 , 方法流程包括：
101 :用户设备 UE进入宏站覆盖区域，与宏站建立连接并进行数据传输。 102: UE接收由所述宏站发送的所述 UE的备选小站的预配置信息， 所述预 配置信息中包括小站识别信息以及小站连接信息。
所述备选小站由宏站在所述至少一个小站中选择得到。 具体是指按照 UE的 运动轨迹， UE可能经过宏站覆盖区域内的至少一个小站的覆盖范围， 则该小站 即为 UE可能经过的小站， 也即 UE的备选接入小站。
所述小站识别信息是指用于识别 ' j、站的信息， UE在确定接入的 ' j、站过程 中， 可以通过所述小站识别信息判断是否已接近宏站预配置的小站。 具体的， 所述小站识别信息包括小站覆盖信息，例如小站地址位置信息或 /和小站服务 区域标识信息， 可选的， 所述小站覆盖信息还包括小站覆盖半径或 /和小站发 送功率等。 进一步的， 所述小站识别信息还可以包括小站小区标识 （cell identity, cell ID ) 以及小站工作频段， 用于辅助实现小区的定位。
所述小站连接信息是指用于与小站建立连接的信息， 进一步， 所述小站连 接信息还可以用于小站与 UE建立连接后的数据传输过程，可以实现 UE与小站之 间的快速连接与同步通信。 所述小站连接信息可以包括： 小站的专用物理随机 接入信道（ physical random access channel, PRACH )资源， 用于 UE向小站发送 随机接入请求。 或者所述小站连接信息可以进一步包括小站的无线承载 （radio bearer, RB ) g己置、 物理层配置、 介质访问控制层 （media access control , MAC ) 层配置， 用于 UE与小站建立连接以后的数据传输过程。 可选的， 由 于小站的 RB配置、 物理层配置以及 MAC层配置用于 UE与小站之间的数据传 输， 因此， 可以在 UE接入小站后， 再由小站根据 UE的需求或主动发送上述 配置信息。
对于 UE接入小站所需的信息， 由宏站通过预先配置的方式发送给 UE, 减少了 UE与小站之间的信息交互，提高数据传输效率，也节约了 UE的能耗。
103: 所述 UE收到所述预配置信息后，根据所述小站识别信息在所述备选小 站中确定准备接入的小站。
104: UE根据所述小站连接信息与所述确定的准备接入的小站建立连接。 进一步， UE在接入小站后， 可以通过所述接入的小站获取通信服务。
本发明实施例还提供了一种小站通信方法， 参见图 3 , 方法流程包括： 201：宏站与进入所述宏站覆盖区域的用户设备 UE建立连接并进行数据传输。 202: 宏站从覆盖区域内的小站中选择确定所述 UE的备选小站。
203: 宏站将所述 UE的备选小站的预配置信息发送给 UE, 所述预配置信息 包括小站识别信息以及小站连接信息。
其中， 所述小站识别信息用于所述 UE在所述备选小站中确定准备接入的小 站， 所述小站连接信息用于 UE与所述准备接入的小站建立连接。
本发明上述两个实施例通过宏站判断 UE可能经过的小站， 并将小站的 预配置信息发送给 UE的方法， 将宏站覆盖区域内的 UE可能经过的小站预 配置给 UE, 无需 UE自行发现小站并上报宏站， 减少了 UE与小站建立连接 所需的时间， 并且还可以相应增加了小站为 UE提供服务的时间。 即使 UE 处于高速运动， 通过本发明实施例提供的方法， 仍然可以有效地接入小站， 获得小站提供的通信服务。 并且， 根据本发明实施例提供的方法， 提升了 UE 的数据吞吐量， 同时节约了 UE的能耗。 可选的， 本发明实施例又提供了一种小站通信方法， 参见图 4 , 方法流 程如下：
301 : 宏站与进入所述宏站覆盖区域的用户设备 UE建立连接并进行数据传 输。
3021-3024: 宏站在所述至少一个小站中选择所述 UE可能经过的的小站， 作为 UE的备选小站， 并将所述备选小站的预配置信息发送给 UE, 所述预配置信 息中包括小站识别信息以及小站连接信息。
具体的， 宏站确定 UE可能经过的小站可以有 3021 -3023三种方式：
3021 : UE上报移动信息给宏站， 宏站以此判断 UE可能经过的小站。
UE可以周期性上报移动信息， 也可以基于事件触发上报移动信息。 UE 向宏站上 4艮的移动信息可以为移动方向信息或者移动轨迹信息， 宏站在接收 到 UE上报的移动方向信息或移动轨迹信息后， 可以根据所述移动方向信息 或移动轨迹信息预估所述 UE的位置变化， 并根据宏站覆盖范围内小站的地 理位置信息， 判断出 UE可能经过的小站， 确定备选小站。 进一步， UE上报 的移动信息还可以包括移动速度信息， 则宏站可以进一步根据移动速度信息 判断出所述 UE到达备选小站的时间， 可以根据该时间来确定何时将备选小 站的预配置信息发送给所述 UE。 或者；
3022: 宏站基于 UE与宏站建立连接后上报的导航信息确定 UE可能经 过的小站。
具体的， 如果 UE内置了全球定位系统（ global positioning system, GPS )功 能， 则 UE也可以向宏站上报 UE的导航信息， 所述导航信息可以为 UE的当前位 置和目的地。 UE在接入宏站后， UE可以将该 UE的导航信息发送给宏站， 宏站 在接收到 UE上报的 UE的导航信息后， 可以根据 UE的位置信息及目的地信息估 计 UE的移动路径， 并确定 UE途中可能经过的小站。 或者；
3023: 宏站基于定位算法定位 UE的位置和速度， 确定 UE可能经过的 小站。
采用步骤 3023 , 无需 UE上报移动信息或导航信息给宏站， 而是宏站主动对 UE进行定位， 从 UE的位置和速度获知 UE的移动路径， 并确定 UE可能进行过的 小站。
通过 3021-3023中任意一种确定 UE的备选小站的方法， 可以减少在 UE确定 准备接入的小站过程中， UE与小站之间、 宏站与小站之间的信息交互， 缩短了
UE与小站连接前准备的时间， 同时节约了 UE能耗。
3024: 宏站将上述 UE的备选小站的预配置信息发送给 UE, 所述预配置 信息中包括小站识别信息以及小站连接信息。
步骤 3031-3036: UE收到所述预配置信息后， 确定准备接入的小站， 测量 准备接入的小站的信号质量，与信号质量满足通信服务条件的小站建立连接， 获取接入的小站所提供的通信服务， 具体包括：
3031 : UE 收到宏站发送的备选小站的预配置信息以后， 基于所述小站 识别信息确定准备接入的小站。
UE 在接收到宏站发送的备选小站的预配置信息后， 可以根据所述小站 识别信息中的小站地址位置信息或小站服务区域标识信息， 获知备选小站的 具体位置， 并根据 UE当前自身所处的位置确定该 UE和所述备选小站的相 对距离， 选择相对距离最近的备选小站作为准备接入的小站。
3032: UE测量所述准备接入的小站的信号质量。
与 UE建立连接的小站的信号质量需要满足服务要求， 因此， UE在确定 准备接入的小站后，需要判断所述准备接入的小站的信号质量是否能够为 UE 提供正常的通信服务。例如， UE可以通过测量小站的 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） 来判断所述准备接入的小站的信号质量是否能 够满足服务要求。
可选的， 设置两个信号质量门限值， 分别为第一门限值和第二门限值， 第一门限值小于第二门限值， 当测量得到的所述准备接入的小站的信号质量 值小于第一门限值， UE 不能与小站建立连接； 当测量得到的所述准备接入 的小站的信号质量值大于或等于第一门限值且小于第二门限值， UE 能够接 入小站， 但小站尚不能为 UE提供正常的通信服务； 当测量得到的所述准备 接入的小站的信号质量值大于或等于第二门限值， 小站能够为 UE提供正常 的通信服务。第二门限值是指 UE能够与小站进行正常通信的 RSRP或 RSRQ 的最低值， 第一门限值按照略小于第二门限值进行选取， 即第一门限值 =第 二门限值 -△, 可以根据网络统计数据确定， 或者根据实际需要任意选择选 择经验值。 例如， UE与小站能够进行正常通信的 RSRP为 -30db , 则第二门 限值为 -30db , 第一门限值为 -35db , 当小站的 RSRP达到 -35db时， UE已接 近小站， 可以向小站发送随机接入请求， 但尚不能进行正常通信。 由于随机 接入请求与响应传输都有时延， 因此在 UE测量到小站信号质量满足正常通 信要求之前， 即 UE在完全进入小站覆盖区域之前向小站发送随机接入请求， 并完成与小站的连接过程， 小站就可以在 UE进入小站覆盖范围之后立即为 其提供服务。
3033: 当所述 UE测得准备接入的小站的信号质量大于或等于第一门限 值， UE可以根据该小站的预配置信息中的小站连接信息包含的专用 PRACH 资源向该小站发起随机接入请求。
3034: 上述 UE准备接入的小站收到所述随机接入请求后， 向 UE反馈 随机接入响应 ( random access response , RAR ) 。
可选的， 本发明实施例还可以进一步包括步骤 3035-3036 , 具体为：
3035: 所述 UE准备接入的小站在向 UE反馈 RAR的同时， 向所述宏站 发送消息， 指示 UE已经接入小站。
3036: 宏站收到 UE 已经接入小站的消息后调度 UE与小站之间的数据 传输。
步骤 3036中，所述宏站可以采用宏站中心调度方式来调度 UE与接入的 小站之间的数据传输。 宏站统一分配宏站和小站在小站与 UE的数据传输过 程中所需的时频资源， 能够更好地进行干扰协调； 同时， UE 需要的数据在 宏站上备份后由宏站发送给小站， 再经小站直接发送给 UE, 无需小站调度 自身与 UE之间的数据传输， 在 UE 离开小站后， 小站也无需将剩余数据传 输回宏站， 避免了在宏站与小站之间反复进行数据交互。
可选的， 所述 UE在通过所述接入的小站获取提供的服务后， 本实施例 的方法还可以进一步包括步骤 3041-3044。
步骤 3041-3044: UE离开接入的小站覆盖区域后， 释放所述接入的小站 的预配置信息。
UE 可以通过删除接收到的所述接入的小站的预配置信息， 终止与该小 站的连接， 释放存储空间。 可选的， UE基于判断自身即将离开小站覆盖区域， 发送 MAC层控制消息 MAC CE ( control element, 控制元素）给宏站， 通知宏站终止数据调度。 判断 方法可以是： UE通过自身当前所处位置判断是否即将离开小站覆盖区域； 或者 UE对该已经接入的小站的信号质量进行测量， 若测量得到的信号质量值小于信 号质量门限， 则 UE可以判断即将离开小站覆盖区域。 所述信号质量门限值可选 择略高于 UE能够与小站进行正常通信的最低值，即信号质量门限值 =正常通信最 低值 +△, 可以根据网络统计数据确定， 或者根据实际需要任意选择选择经验 值。 例如， 小站能够正常通信的 RSRP最低值为 -30db, 则信号质量门限值可选为 -25db, 此时， UE即将离开小站覆盖区域。 由于 MAC CE消息传输有时延， 通过 预先发送 MAC CE消息， 可以保证 UE在离开小站覆盖区域后就能立即释放小站 的预配置信息， 相应的， 宏站也能立即终止调度小站与 UE之间的数据传输， 并 指示小站释放 UE上下文， 从而实现 UE与小站之间的快速释放。
步骤 3041-3044可具体为：
3041 : UE基于当前自身位置或对已经接入的小站的信号质量测量结果预 测即将离开接入的小站。
3042： UE发送携带释放指示的 MAC CE消息给宏站， 指示宏站向接入的 小站发送释放 UE上下文的消息。
3043 : 在所述 MAC CE消息传输完成后， UE释放接入的小站的预配置信 息。
3044: 宏站收到上述 MAC CE消息后终止调度所述 UE与接入的小站之间 的数据传输， 并向该接入的小站发送消息， 指示小站释放 UE上下文。
采用步骤 3041-3044能够快速终止 UE与小站间的连接， 实现网络侧资 源的快速回收， 同时节约 UE能耗。 在本发明的再一个实施例中， 提供了一种小站通信方法， 参见图 5 , 其 中， 步骤 401 , 4021-4024 , 4031-4036参照图 4所示实施例中的步骤 301 , 3021-3024 , 3031-3036;
与图 4所示实施例的区别在于步骤 4041-4043 ：
4041 : 宏站连续 N次 （ N>2 , N为整数 )调度 UE与接入的小站之间的 数据传输不成功。
例如宏站调度 UE上行数据， 但小站没有收到所述上行数据， 宏站因而 没有收到小站发送的确认消息， 或者宏站连续将下行数据发送给小站， 由小 站发送给 UE, 但小站发送不成功， 则可认为 UE已经离开接入的小站。
4042: UE释放接收到的小站的预配置信息。
4043: 宏站终止调度 UE与接入的小站之间的数据传输， 并向该接入的 小站发送消息， 指示小站释放 UE上下文。
本发明实施例通过宏站判断 UE与小站之间的数据传输情况从而终止 UE 与小站之间的数据传输， 在实现 UE与小站的快速连接的前提下， 保证了在 UE没有发送 MAC CE消息或 MAC CE消息传输失败的情况下， UE与小站 仍能实现快速释放。 在本发明的另一个实施例中， 提供了一种小站通信方法， 参见图 6 , 其 中， 步骤 501 , 5021-5023 , 5031-5036参照图 4所示实施例中的步骤 301 , 3021-3023 , 3031-3036;
与图 4所示实施例的区别在于， 步骤 5024中： 宏站将上述 UE的备选 小站的预配置信息发送给 UE, 所述小站预配置信息中还包括小站的连接有 效时间。
可选的， 所述连接有效时间可以由小站在 UE尚未接入宏站之前预先发 送给所述宏站； 也可以由宏站根据 UE的移动速度确定， UE的移动速度越快 则所述小站的连接有效时间可以设置得越短， UE 的移动速度越慢则所述小 站的连接有效时间可以设置得越长。 或者， 该小站的连接有效时间可以根据 网络的统计数值确定或者根据经验值确定等。譬如，有效时间可设置为 10ms。 对应的， 步骤 5041-5043可以采用：
5041 : UE与宏站分别测量 UE与接入的小站的连接时间是否超过小站的 连接有效时间， 其中， UE在接收到小站的 RAR后开始测量； 小站在向 UE 反馈 RAR的同时， 向宏站发送指示 UE已经接入的消息， 宏站在收到所述指 示消息后开始测量。
5042: 当 UE测量得到的 UE与接入的小站的连接时间超过所述的连接 有效时间， UE主动释放接入的 ' j、站的预配置信息。
5043: 当宏站测量得到的 UE与接入的小站的连接时间超过所述的连接 有效时间， 宏站自动终止调度 UE与接入的小站之间的数据传输， 并向该小 站发送消息， 指示小站释放 UE上下文。
本发明实施例通过设置小站的连接有效时间， 并作为预配置信息的组成 部分发送给 UE, 当 UE 与小站的连接时间超过所述的连接有效时间， 默认 UE已经离开接入的小站， UE主动释放该接入的小站的预配置信息， 宏站自 动终止调度小站与 UE之间的数据传输， 减少 UE与宏站之间的信息交互， 实现 UE与接入的小站之间的快速释放， 提高网络工作效率。 本发明实施例提供了一种宏站， 应用于异构网中， 所述异构网中包括所述 宏站以及所述宏站覆盖区域内的至少一个小站。 参见图 7 , 该宏站包括：
连接传输模块 601： 用于与进入所述宏站覆盖区域的用户设备 UE建立连接， 并与所述 UE进行数据传输。
小站选择模块 602: 用于在所述至少一个小站中， 按照 UE的运动轨迹， 选择 UE可能经过的小站， 作为 UE的备选小站。
发送模块 603: 用于将所述 UE的备选小站的预配置信息发送给所述 UE, 所 述预配置信息包括小站识别信息以及小站连接信息。
可选的，所述小站选择模块 602还包括移动信息接收单元 6021 ,用于接收 UE 周期上报的移动信息； 所述移动信息包括所述 UE的移动方向信息或者移动轨迹 信息， 进一步的还可以包括所述 UE的移动速度信息。 所述移动信息可以用于宏 站确定 UE可能经过的小站， 作为 UE的备选小站。
可选的， 该宏站还包括， 数据调度模块 604 , 用于在所述 UE与所述准备接 入的小站建立连接后， 调度所述 UE与接入的小站之间的数据传输。
所述数据调度模块 604进一步用于， 判断 UE已经离开所述接入的小站， 终 止调度 UE与接入的小站之间的数据传输， 并向该小站发送消息， 指示小站释放 UE上下文。 对于数据调度模块 604的该项功能可以有两种实现方式：
第一种方式：在数据调度模块 604中可以设置有 MAC CE消息接收单元 6041 , 用于接收 UE发送的携带释放指示的 MAC CE消息， 若接收到所述 MAC CE消息， 可以确定 UE已经离开接入的小站， 所述数据调度模块 604可以终止调度所述 UE 与接入的小站之间的数据传输，并向该小站发送消息，指示小站释放 UE上下文。
第二种方式： 所述数据调度模块 604连续 N次 （N>2 , N为整数）调度 UE与小站数据传输不成功， 例如宏站调度 UE上行数据传输， 但小站没有收 到所述数据， 宏站因而没有收到小站发送的确认消息， 或者宏站连续将下行 数据发送给小站， 由小站发送给 UE, 但小站发送下行数据不成功， 则可认 为 UE已经离开接入的小站，所述数据调度模块 604 自动终止调度小站与 UE 之间的数据传输， 并向所述小站发送消息， 指示小站释放 UE上下文。
第二种方式保证了在没有 MAC CE信号发送或 MAC CE发送失败的情况下， UE与小站仍能实现快速释放。
在另一个实施例中， 所述宏站还可以包括连接时间测量模块 605: 用于测 量 UE接入小站后所用的时间， 在该实施例中， 发送模块 603发送给 UE的备选小 站的预配置信息包含小站的连接有效时间； 所述连接时间测量模块 605测量到所 述 UE与接入的小站的连接时间超过所述的小站连接有效时间， 发送消息给所述 数据调度模块 604, 所述数据调度模块 604随即终止调度 UE与接入的小站之间的 数据传输。
本发明实施例提供的图 7所示的宏站可以是图 2-6所示的小站通信方法实施 例中的宏站， 图 7所示的宏站可以执行如图 2-6所示的小站通信方法， 具体可以参 照上述图 2-6所示的具体方法实施例， 在此不再赘述。 如图 8所示， 本发明实施例又提供了一种用户设备 UE, 该 UE中包括： 连接传输模块 701 : 用于接入所述宏站， 并与所述宏站进行数据传输。
接收模块 702: 用于接收宏站发送的 UE的备选小站的预配置信息， 所述 UE 的备选小站由宏站从所述至少一个小站中选择得到， 所述预配置信息中包括小 站识别信息以及小站连接信息。
小站判定模块 703 : 用于根据所述小站识别信息在所述备选小站中确定 准备接入的小站。
具体的， 在接收模块 702收到备选小站的预配置信息以后， 小站判定模 块 703基于所述小站识别信息， 确定准备接入的小站。 具体的， 可以根据所 述小站识别信息中的小站地址位置信息或小站服务区域标识信息， 获知备选 小站的具体位置， 并根据 UE当前自身所处的位置确定该 UE和所述备选小 站的相对距离， 选择相对距离最近的备选小站作为准备接入的小站。
小站接入模块 704: 用于根据所述小站连接信息与所述准备接入的小站 建立连接。
具体的， 小站接入模块 704包括小站信号质量测量单元 7041 , 用于测量 准备接入的小站的信号质量是否能够为 UE提供正常的通信服务。 当准备接 入的小站的信号质量满足服务条件， 小站接入模块 704利用该准备接入的小 站的预配置信息中包含的专用 PRACH资源向该小站发起随机接入请求。
进一步的， 所述小站接入模块 704可以包括： MAC CE发送单元 7042, 用于 发送携带释放指示的 MAC CE消息给宏站， 具体的， UE基于自身当前位置或对 小站的信号质量测量结果预测即将离开接入的小站， 则发送携带释放指示的 MAC CE消息给宏站， 指示宏站向 UE接入的小站发送释放 UE上下文的消息。
进一步的， 所述 UE中还包括释放模块 705 , 可以用于在所述 MAC CE消 息发送完成后， 释放所述 UE接入的小站的预配置信息。
可选的， 所述 UE还可以包括： 移动信息上报模块 706, 用于向宏站周期上报 移动信息， 所述移动信息包括， 所述 UE的移动方向信息或者移动轨迹信息， 进 一步的还可以包括所述 UE的移动速度信息，所述移动信息可以用于宏站确定 UE 可能经过的小站， 作为 UE的备选小站。
在另一个实施例中， 接收模块 702接收到的备选小站的预配置信息还包括： 小站的连接有效时间； 所述 UE还可以包括： 连接时间测量模块 707 , 用于测量 UE接入小站后所用的时间。 当所述连接时间测量模块 707测量到所述 UE与接入 的小站的连接时间超过所述的小站连接有效时间， 发送消息给所述释放模块 705 , 所述释放模块 705释放存储的所述接入的小站的预配置信息。
本发明实施例提供的图 8所示的 UE可以是图 2-6所示的小站通信方法实施例 中的 UE, 图 8所示的 UE可以执行如图 2-6所示的小站通信方法， 具体可以参照上 述图 2-6所示的具体方法实施例， 在此不再赘述。 如图 9所示， 本发明实施例还提供了一种宏站， 应用于异构网中， 所述异构 网中包括所述宏站， 所述宏站覆盖至少一个小站， 该宏站包括：
处理器 801 : 用于与进入所述宏站覆盖区域的用户设备 UE建立连接， 并与所 述 UE进行数据传输； 以及在所述至少一个小站中选择 UE可能经过的小站， 作为 UE的备选小站。
发送器 802: 用于将所述 UE的备选小站的预配置信息发送给所述 UE, 所述 预配置信息包括小站识别信息以及小站连接信息。
所述处理器 801可以进一步用于，在所述 UE与所述准备接入的小站建立连接 后， 调度所述 UE与接入的小站之间的数据传输。
所述处理器 801可以进一步用于， 判断 UE已经离开所述接入的小站， 终止调 度 UE与接入的小站之间的数据传输， 并向该小站发送消息， 指示小站释放 UE上 下文。 对于处理器 801的该项功能可以有两种实现方式： 第一种方式： 在所述宏站中设置接收器 803 , 用于接收 UE发送的携带释放指 示的 MAC CE消息， 若所述接收器 803接收到所述 MAC CE消息， 可以确定 UE已 经离开接入的小站，所述处理器 801可以终止调度所述 UE与接入的小站之间的数 据传输。
第二种方式： 所述处理器 801连续 N次（N>2, N为整数）调度所述 UE与接 入的小站数据收发失败， 判断 UE已经离开所述接入的小站， 终止调度所述 UE与 该小站之间的数据传输。
在另一个实施例中， 所述宏站还包括： 计时器 804, 用于测量 UE接入小站后 所用的时间， 在该实施例中， 所述发送器 801发送的备选小站预配置信息还包括 小站的连接有效时间。所述计时器 804测量到所述 UE与接入的小站的连接时间超 过所述的小站连接有效时间， 发送消息给所述处理器 801 , 所述处理器 801随即 终止调度 UE与接入的小站之间的数据传输， 并向该小站发送消息， 指示小站释 放 UE上下文。
进一步的， 所述接收器可用于， 接收 UE周期上报的移动信息， 所述移动信 息包括， 所述 UE的移动方向信息或者移动轨迹信息， 进一步的还可以包括所述 UE的移动速度信息， 所述移动信息可以用于宏站确定 UE可能经过的小站， 作为 UE的备选小站。
本发明实施例提供的图 9所示的宏站可以是图 2-6所示的小站通信方法实施 例中的宏站， 图 9所示的宏站可以执行如图 2-6所示的小站通信方法， 具体可以参 照上述图 2-6所示的具体方法实施例， 在此不再赘述。 本发明实施例还提供了一种用户设备 UE, 应用于异构网中， 所述异构网中 包括宏站， 所述宏站覆盖至少一个小站， 参见图 10, 该 UE包括：
接收器 901 : 用于接收宏站发送的 UE可能经过的小站的预配置信息， 所述 UE的备选小站由宏站从所述至少一个小站中选择得到， 所述预配置信息中包括 小站识别信息以及小站连接信息； 处理器 902: 用于接入所述宏站， 与所述宏站进行数据传输； 以及根据所述 小站识别信息在所述备选小站中确定准备接入的小站， 根据所述小站连接信息 与所述准备接入的小站建立连接。
可选的， 所述 UE还包括： 发送器 903 , 用于发送携带释放指示的 MAC CE消 息给宏站， 具体的， 发送器基于 UE自身当前位置或对小站的信号质量测量结 果预测即将离开接入的小站， 则发送携带释放指示的 MAC CE消息给宏站， 指示宏站向接入的小站发送释放 UE上下文的消息。
所述处理器 902进一步用于， 当 MAC CE消息发送成功后，释放所述 UE接入 的小站的预配置信息。
所述发送器 903还可以用于， 向所述宏站周期上报移动信息， 所述移动信息 包括， 所述 UE的移动方向信息或者移动轨迹信息， 进一步的还可以包括所述 UE 的移动速度信息， 所述移动信息可以用于宏站确定 UE可能经过的小站， 作为 UE 的备选小站。
在另一个实施例中， 所述 UE还包括： 计时器 904, 用于测量接入小站后所用 的时间； 在该实施例中， 接收器 901接收到的备选小站的预配置信息还包括： 小 站的连接有效时间；所述计时器 904测量到所述 UE与接入的小站的连接时间超过 所述的小站连接有效时间， 发送消息给所述处理器 902, 所述处理器 902释放 UE 接入的小站预配置信息。
本发明实施例提供的图 10所示的 UE可以是图 2-6所示的小站通信方法实施 例中的 UE, 图 10所示的 UE可以执行如图 2-6所示的小站通信方法， 具体可以参 照上述图 2-6所示的具体方法实施例， 在此不再赘述。 本发明实施例还提供了一种网络系统， 包括上述图 7或图 9所示实施例中的 宏站， 以及图 8或图 10所示实施例中的用户设备， 所述网络系统中的宏站及用户 设备可以任意组合， 例如可以采用图 7所示宏站以及图 8所示用户设备； 或者图 9 所示宏站以及图 10所示用户设备， 不做限定。 所述网络系统中的宏站及用户设 备可以是图 2-6所示的小站通信方法实施例中所述的宏站及用户设备， 可以执行 如图 2-6所示的小站通信方法， 具体可以参照上述图 2-6所示的具体方法实施例， 在此不再赘述。
本发明上述两个实施例通过宏站判断 UE可能经过的小站， 并将小站的 预配置信息发送给 UE的方法， 将宏站覆盖区域内的 UE可能经过的小站预 配置给 UE, 无需 UE自行发现小站并上报宏站， 减少了 UE与小站建立连接 所需的时间， 并且还可以相应增加了小站为 UE提供服务的时间。 即使 UE 处于高速运动， 通过本发明实施例提供的方法， 仍然可以有效地接入小站， 获得小站提供的通信服务。 并且， 根据本发明实施例提供的方法， 提升了 UE 的数据吞吐量， 同时节约了 UE的能耗。
所属领域的技术人员可以清楚地了解到， 为描述的方便和筒洁， 上述描述 的设备和模块的具体工作过程， 可以参考前述方法实施例中的对应过程描述。
在本申请所提供的几个实施例中， 应该理解到， 所揭露的设备和方法， 可 以通过其它的方式实现。 例如， 以上所描述的装置实施例仅仅是示意性的， 例 如， 所述模块的划分， 仅仅为一种逻辑功能划分， 实际实现时可以有另外的划 分方式， 例如多个模块或组件可以结合或者可以集成到另一个设备中， 或一些 特征可以忽略， 或不执行。
另外， 在本发明各个实施例中的各功能模块可以集成在一个处理模块中， 可以是各个模块单独物理存在， 也可以两个或两个以上模块集成在一个模块中。
本领域普通技术人员可以理解实施上述实施例的全部或部分步骤可以通 过硬件来完成， 也可以通过程序来指令相关的硬件完成， 所述的程序可以存 储于一种计算机可读介质中， 上述提到的存储介质可以是只读存储器， 磁盘 或光盘等。
最后需要说明的是： 以上所述仅为本发明的较佳实施例， 并不用于限制 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
1. 一种小站通信方法， 其特征在于， 该方法应用于异构网中， 所述异构网 中包括宏站， 所述宏站覆盖至少一个小站， 包括：
用户设备 UE接入所述宏站， 与所述宏站进行数据传输；
所述 UE接收所述宏站发送的所述 UE的备选小站的预配置信息， 所述 UE的 备选小站由宏站从所述至少一个小站中选择得到， 所述预配置信息中包括小站 识别信息以及小站连接信息；
所述 UE根据所述小站识别信息在所述备选小站中确定准备接入的小站； 所述 UE根据所述小站连接信息与所述准备接入的小站建立连接。
2. 根据权利要求 1所述的方法， 其特征在于， 所述预配置信息还包括所述备 选小站的连接有效时间；
所述方法还包括：
当所述 UE与接入的小站的连接时间超过所述连接有效时间，所述 UE释放所 述接入的小站的预配置信息。
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 UE发送携带释放指示的 MAC层控制 MAC CE消息给所述宏站； 所述 UE释放所述接入的小站的预配置信息。
4. 根据权利要求 1所述的方法， 其特征在于， 所述小站识别信息包括小站覆
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5. 根据权利要求 4所述的方法， 其特征在于， 所述小站覆盖信息包括小站地 址位置信息和 /或小站服务区域标识信息。
6. 根据权利要求 1-5所述的方法，其特征在于，所述 UE周期上报移动信息给 所述宏站， 所述移动信息用以确定所述 UE的备选小站。
7. 一种小站通信方法， 其特征在于， 该方法应用于异构网中， 所述异构 网中包括宏站， 所述宏站覆盖至少一个小站， 包括：
所述宏站与进入所述宏站覆盖区域的用户设备 UE建立连接， 并与所述 UE进 行数据传输；
所述宏站从所述至少一个小站中确定所述 UE的备选小站；
所述宏站将所述 UE的备选小站的预配置信息发送给所述 UE,所述预配置信 息包括小站识别信息以及小站连接信息；
所述小站识别信息用于所述 UE在所述备选小站中确定准备接入的小站， 所 述小站连接信息用于 UE与所述准备接入的小站建立连接。
8. 根据权利要求 7所述的方法， 其特征在于， 所述方法还包括， 在所述 UE 与所述准备接入的小站建立连接后， 所述宏站调度所述 UE与接入的小站之间的 数据传输。
9. 根据权利要求 8所述的方法， 其特征在于， 所述宏站判断所述 UE已经离 开所述接入的小站， 终止调度所述 UE与所述接入的小站之间的数据传输， 并向 所述接入的小站发送消息， 指示所述接入的小站释放所述 UE的上下文。
10. 根据权利要求 9所述的方法， 其特征在于， 所述宏站判断 UE已经离开所 述接入的小站包括：
所述宏站收到 UE发送的携带释放指示的 MAC CE消息， 根据所述 MAC CE 消息确定所述 UE已经离开所述接入的小站。
11. 根据权利要求 9所述的方法， 其特征在于， 所述宏站判断所述 UE已经离 开所述接入的小站包括：
当所述宏站连续调度所述 UE与所述接入的小站之间的数据传输失败， 确定 所述 UE已经离开所述接入的小站。
12. 根据权利要求 7所述的方法， 其特征在于， 所述预配置信息还包括所述 UE的备选小站的连接有效时间；
所述方法还包括：
当所述 UE与所述接入的小站的连接时间超过所述连接有效时间， 所述宏站 终止调度所述 UE与所述接入的小站之间的数据传输， 并向所述接入的小站发送 消息， 指示所述接入的 ' j、站释放所述 UE的上下文。
13. 一种宏站，其特征在于，应用于异构网中，所述异构网中包括所述宏站， 所述宏站覆盖至少一个小站， 包括：
连接传输模块： 用于与进入所述宏站覆盖区域的用户设备 UE建立连接， 并 与所述 UE进行数据传输；
小站选择模块： 用于从所述至少一个小站中确定所述 UE的备选小站； 发送模块： 用于将所述备选小站的预配置信息发送给所述 UE, 所述预配置 信息包括小站识别信息以及小站连接信息；
所述小站识别信息用于所述 UE在所述备选小站中确定准备接入的小站， 所 述小站连接信息用于 UE与所述准备接入的小站建立连接。
14. 根据权利要求 13所述的宏站， 其特征在于， 还包括： 数据调度模块， 用 于在所述 UE与所述准备接入的小站建立连接后，调度所述 UE与接入的小站之间 的数据传输。
15. 根据权利要求 14所述的宏站， 其特征在于， 所述数据调度模块进一步用 于， 判断所述 UE已经离开所述接入的小站， 终止调度所述 UE与所述接入的小站 之间的数据传输， 并向所述接入的小站发送消息， 指示所述接入的小站释放所 述 UE的上下文。
16. 根据权利要求 15所述的宏站，其特征在于，所述数据调度模块中还包括： MAC CE消息接收单元， 用于接收 UE发送的携带释放指示的 MAC CE消息； 所述数据调度模块进一步用于， 根据接收到的所述 MAC CE消息确定 UE已 经离开所述接入的小站。
17. 根据权利要求 15所述的宏站， 其特征在于， 所述数据调度模块进一 步用于， 连续调度所述 UE 与所述接入的小站数据传输失败， 确定所述 UE 已经离开所述接入的小站。
18. 根据权利要求 13所述的宏站， 其特征在于， 所述预配置信息还包括所述 UE的备选小站的连接有效时间；
所述宏站还包括： 连接时间测量模块， 用于测量 UE接入小站后所用的 时间；
所述数据调度模块进一步用于： 当所述 UE与所述接入的小站的连接时间超 过所述连接有效时间， 终止调度所述 UE与所述接入的小站之间的数据传输， 并 向所述接入的小站发送消息， 指示所述接入的小站释放所述 UE的上下文。
19. 根据权利要求 13-18任一所述的宏站， 其特征在于， 所述小站选择模块 还包括： 移动信息接收单元， 用于接收所述 UE周期上报的移动信息， 所述移动 信息用以确定所述 UE的备选小站。
20. 一种用户设备 UE, 其特征在于， 应用于异构网中， 所述异构网中包括 宏站， 所述宏站覆盖至少一个小站， 包括：
连接传输模块： 用于接入所述宏站， 与所述宏站进行数据传输；
接收模块： 用于接收宏站发送的 UE的备选小站的预配置信息， 所述 UE的备 选小站由宏站从所述至少一个小站中选择得到， 所述预配置信息中包括小站识 别信息以及小站连接信息；
小站判定模块： 用于根据所述小站识别信息在所述备选小站中确定准备接 入的小站；
小站接入模块： 用于根据所述小站连接信息与所述准备接入的小站建立连 接。
21. 根据权利要求 20所述 UE, 其特征在于， 还包括： 释放模块， 用于释放 所述 UE接入的 ' j、站的预配置信息。
22. 根据权利要求 21所述 UE,其特征在于，所述小站接入模块包括： MAC CE 发送单元， 用于发送携带释放指示的 MAC CE消息给所述宏站。
所述释放模块进一步用于： 在所述 MAC CE消息发送后， 释放所述 UE接入 的小站的预配置信息。
23. 根据权利要求 21所述 UE, 其特征在于， 所述预配置信息还包括 UE的备 选小站的连接有效时间；
还包括： 连接时间测量模块， 用于测量所述 UE接入小站后所用的时间； 所述释放模块进一步用于， 当所述 UE与所述接入的小站的连接时间超过所 述连接有效时间， 释放所述接入的小站的预配置信息。
24. 根据权利要求 20-23所述 UE,其特征在于，还包括：移动信息上报模块， 用于向所述宏站周期上报移动信息，所述移动信息用以确定所述 UE的备选小站。
25. 一种宏站，其特征在于，应用于异构网中，所述异构网中包括所述宏站， 所述宏站覆盖至少一个小站， 包括：
处理器： 用于与进入所述宏站覆盖区域的用户设备 UE建立连接， 并与所述 UE进行数据传输； 以及在所述至少一个小站中选择用户设备 UE可能经过的小站; 发送器： 用于将所述 UE的备选小站的预配置信息发送给所述 UE, 所述预配 置信息包括小站识别信息以及小站连接信息；
所述小站识别信息用于所述 UE在所述备选小站中确定准备接入的小站， 所 述小站连接信息用于 UE与所述准备接入的小站建立连接。
26. 根据权利要求 25所述的宏站， 其特征在于， 所述处理器进一步用于， 在 所述 UE与所述准备接入的小站建立连接后，调度所述 UE与接入的小站之间的数 据传输。
27. 根据权利要求 26所述的宏站， 其特征在于， 所述处理器进一步用于， 判 断 UE已经离开所述接入的小站，终止调度所述 UE与所述接入的小站之间的数据 传输， 并向所述接入的小站发送消息， 指示所述接入的小站释放所述 UE的上下 文。
28. 根据权利要求 27所述的宏站， 其特征在于， 还包括： 接收器， 用于接收 所述 UE发送的携带释放指示的 MAC CE消息；
所述处理器进一步用于， 根据接收到的所述 MAC CE消息， 确定 UE已经离 开所述接入的小站。
29. 根据权利要求 27所述的宏站， 其特征在于， 所述处理器进一步用于， 连 续调度所述 UE与接入的小站数据传输失败， 确定 UE已经离开所述接入的小站。
30. 根据权利要求 25所述的宏站， 其特征在于， 所述预配置信息还包括 UE 的备选小站的连接有效时间；
还包括： 计时器， 用于测量 UE接入小站后所用的时间；
所述处理器进一步用于： 若所述 UE接入小站后所用的时间超过所述连接有 效时间， 终止调度所述 UE与所述接入的小站之间的数据传输， 并向所述接入的 小站发送消息， 指示所述接入的小站释放所述 UE的上下文。
31. 根据权利要求 25-30任一所述的宏站， 其特征在于， 所述接收器进一步 用于， 接收所述 UE周期上报的移动信息， 所述移动信息用以确定所述 UE的备选 小站。
32. 一种用户设备 UE, 其特征在于， 应用于异构网中， 所述异构网中包括 宏站， 所述宏站覆盖至少一个小站， 包括：
接收器： 用于接收宏站发送的 UE可能经过的小站的预配置信息， 所述 UE的 备选小站由宏站从所述至少一个小站中选择得到， 所述预配置信息中包括小站 识别信息以及小站连接信息；
处理器： 用于接入所述宏站， 与所述宏站进行数据传输； 以及根据所述小 站识别信息在所述备选小站中确定准备接入的小站， 根据小站连接信息与所述 准备接入的小站建立连接。
33. 根据权利要求 32所述 UE, 其特征在于， 所述预配置信息还包括 UE可能 经过的小站的连接有效时间；
还包括： 计时器， 用于测量所述 UE接入小站后所用的时间；
所述处理器进一步用于， 当所述 UE与所述接入的小站的连接时间超过所述 连接有效时间， 释放所述接入的小站的预配置信息。
34. 根据权利要求 32所述 UE, 其特征在于， 还包括： 发送器， 用于发送携 带释放指示的 MAC CE消息给所述宏站；
所述处理器进一步用于， 当所述 MAC CE消息发送后，释放所述接入的小站 的预配置信息。
35. 根据权利要求 34所述 UE, 其特征在于， 所述发送器进一步用于， 向宏 站周期上报移动信息， 所述移动信息用以确定所述 UE的备选小站。
36. 一种网络系统，其特征在于，应用于异构网中，所述异构网中包括宏站， 所述宏站覆盖至少一个小站， 所述网络系统包括， 权利要求 13-19或权利要求 25-31所述的宏站； 权利要求 20-24或权利要求 32-35所述的用户设备 UE。
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