WO2014040558A1 - Procédé et dispositif de configuration de petite cellule - Google Patents

Procédé et dispositif de configuration de petite cellule Download PDF

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Publication number
WO2014040558A1
WO2014040558A1 PCT/CN2013/083460 CN2013083460W WO2014040558A1 WO 2014040558 A1 WO2014040558 A1 WO 2014040558A1 CN 2013083460 W CN2013083460 W CN 2013083460W WO 2014040558 A1 WO2014040558 A1 WO 2014040558A1
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WIPO (PCT)
Prior art keywords
small cell
base station
location information
cell
signaling
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PCT/CN2013/083460
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English (en)
Chinese (zh)
Inventor
苟伟
鲁照华
左志松
Original Assignee
中兴通讯股份有限公司
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Publication of WO2014040558A1 publication Critical patent/WO2014040558A1/fr

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Classifications

    • 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
    • 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
    • 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

  • LTE Long Term Evolution
  • LTE-A Evolution-A
  • LTE-A Evolution-A
  • CCs component carriers
  • one LTE terminal can only work on one backward compatible CC
  • a stronger LTE-A terminal can simultaneously on multiple CCs.
  • the terminal implementing LTE-A simultaneously transmits and receives data in multiple component carriers, thereby achieving the purpose of improving bandwidth.
  • This technique is known as multi-carrier aggregation technology.
  • a small cell is introduced. Small cells are characterized by small coverage (tens of meters in radius), low transmission power, and high density of deployment. Macro cell Compared with a small cell, a macro cell generally has a large coverage range (above 500 meters) and a high transmission power. The macro cell can use the same frequency as the small cell or a different frequency.
  • FIG. 1 is a schematic diagram of a typical macro cell and a small cell jointly deployed according to the related art. As shown in FIG. 1 , there are many small cells under the macro cell coverage, and different frequency bands are used, and the macro cell uses the frequency point fl. The small cell uses the frequency point f2. Certainly, in the scenario of carrier aggregation, multiple frequencies of the macro cell may be used, and the small cell may also use multiple frequency points, and the macro cell and the small cell frequency point do not overlap.
  • the macro cell generally uses a frequency below 2 GHz
  • the small cell generally uses a frequency above 3 Ghz. Since the coverage of the small cell is small and the number is large, and most of the frequency points are different from those of the macro cell, in a system configured with a small cell, the UE needs to frequently perform inter-frequency measurement, thereby causing a large power consumption of the UE. Moreover, due to the inter-frequency measurement, most UEs need to maintain the data transmission of the original frequency, thereby affecting the data transmission of the macro cell. Therefore, in a system with a large number of small cells, optimization of small cell measurements needs to be considered to help the terminal save energy.
  • the LTE R11 phase puts forward new requirements for spectrum resource utilization, network energy conservation, and interference suppression between cells.
  • a new carrier type has been proposed.
  • the typical feature of the new carrier is that it does not need to consider backward compatibility when designing, and can be applied to more new technologies.
  • the current LTE R11 is defined as a new carrier, and needs to be paired with at least one compatible carrier.
  • the cell reference signal (CRS) of the LTE R8 is not configured in the new carrier to avoid the neighboring cell in the cell. Severe CRS interference at the edge, especially CRS interference between macro cells and small cells in a heterogeneous network (HetNet) scenario.
  • HetNet heterogeneous network
  • the carriers in the small cell are all configured as a new carrier type, which can help the small cell to save power in some cases.
  • the small cell when the small cell does not serve the UE, the small cell can be turned off, thereby helping the network side to save energy.
  • the closed small cell cannot be found by the UE to be configured, so that the small cell cannot be configured to the UE.
  • a method for configuring a small cell including: acquiring, by a base station, location information of a UE; the base station, according to location information of the UE, selecting a small cell configured for the UE; The base station notifies the selected small cell, notifies the selected small cell to send a measurement signal, and notifies the small cell configured for the UE to the UE.
  • the method further includes: the UE performing measurement on the small cell configured to itself, and reporting the measurement result, where The base station activates the small cell for the UE according to the measurement result.
  • the method before the acquiring, by the base station, the location information of the UE, the method further includes: the base station notifying the UE to perform a positioning process, and receiving location information of the UE reported by the UE; or Its own location information.
  • the notifying the UE to perform the positioning process includes: the base station notifying the UE to perform a positioning process based on a positioning reference signal, or informing the UE to perform a positioning process based on a global positioning system.
  • the method before the base station notifies the selected small cell, the method further includes: when determining that the selected small cell has started transmitting the measurement signal, the base station does not notify the selected small cell to send a measurement signal.
  • the notifying, by the base station, the small cell configured for the UE to the UE includes: the information bearer of the small cell configured by the base station by using the RRC connection between the UE and the macro cell Transmitted to the UE in dedicated RRC signaling.
  • the selecting, by the base station, the small cell configured for the UE according to the location information of the UE includes: the base station selecting, according to the location information of the UE, the small cell configured for the UE according to predetermined information.
  • the predetermined information includes: location information of the small cell.
  • the base station according to the location information of the UE, and the location information of the small cell, select a small cell configured for the UE, and the method includes: the base station according to location information of the small cell and location information of the UE, Calculating a distance between the small cell and the UE, and selecting all or a predetermined number of small cells whose distance is less than a predetermined value to allocate to the UE.
  • the predetermined information further includes at least one of: load information of the small cell, link quality between the UE and the small cell, and carrier aggregation capability of the UE.
  • the base station in combination with the load information of the small cell, selects a small cell configured for the UE, the method includes: determining, by the base station, whether a load capability of the small cell to be selected is allowed to access a new UE, if allowed, The base station determines that the small cell to be selected can be configured to the UE, otherwise, the base station determines that the small cell to be selected cannot be configured to the UE.
  • the base station in combination with the link quality between the UE and the small cell, selects a small cell configured for the UE, and the method includes: determining, by the base station, a link between the UE and a small cell to be selected Whether the quality meets the predetermined condition, and if yes, the base station determines that the small cell to be selected can be configured to the UE, otherwise, the base station determines that the small cell to be selected cannot be configured to the UE.
  • the base station in combination with the carrier aggregation capability of the UE, selects a small cell configured for the UE, and the method includes: the base station configuring, according to the carrier aggregation capability of the UE, that the UE is configured to be less than or equal to the carrier aggregation. A small cell of the number of carriers indicated by the capability.
  • the method further includes: the process of the UE according to the cell handover The small cell selected by the base station is measured and accessed.
  • the measurement signal comprises: CSI-RS, or CRS in the LTE28 protocol, or a 5ms period
  • the base station notifies the UE to perform the positioning process, and receives the location information of the UE, and the base station sends the signaling to the UE to notify the UE to perform positioning; After the signaling, the location information indicating the location of the UE corresponding to the location mode is obtained according to a predetermined positioning manner; the UE reports the location information to the base station.
  • the base station notifies the UE to perform the positioning process
  • the method includes: the base station transmitting, by using the RRC connection between the UE and the macro cell, a signaling bearer that notifies the UE to perform a positioning process, in a dedicated RRC signaling, to send the UE.
  • the small cell remains in a closed state before the base station notifies the selected small cell.
  • the small cell is a small cell that does not support UE camping.
  • the notifying, by the base station, that the performing the positioning process comprises: sending, by the base station, a periodic fixed channel that is agreed with the UE in advance or a periodic preset resource that is agreed with the UE in advance, for notifying one or Multiple UEs perform signaling of positioning.
  • the information carried in the signaling includes: an identifier of the UE, where the identifier of the UE includes: a C-RNTI of the UE or a UE ID of the UE.
  • the method further includes: detecting, by the UE, an identifier of the UE in signaling sent by the fixed channel or the preset resource, the UE It is determined that positioning needs to be performed, and the base station needs to configure a small cell for the UE.
  • the notifying, by the base station, that the selected small cell comprises: sending, by the base station, notification signaling to the selected small cell, where the notification signaling is sent by using a dedicated resource allocated for each small cell; or The base station sends the notification signaling in the preset fixed channel or the preset resource, where the notification signaling carries the correspondence between the identifier of the UE and the identifier of the small cell configured for the UE.
  • the identifier of the small cell includes: an index number of the small cell, an ID of the small cell, a virtual ID of the small cell, or location information of the small cell.
  • the sending, by the base station, the small cell configured for the UE to the UE includes: sending, by the base station, information about the small cell configured for the UE to the UE, where The information of the small cell includes at least one of the following: an identifier of the small cell, a frequency of the small cell, an index in the small cell, and an index of the small cell in the subordinate of the base station.
  • a method for transmitting a measurement signal of a small cell including: receiving, by a small cell, a notification signal sent by a base station; sending, by the small cell, a measurement signal, or transmitting the measurement signal and synchronizing signal.
  • the small cell Preferably, before the small cell receives the notification signal sent by the base station, the small cell remains in an off state; after receiving the notification signal, the small cell initiates transmission of the measurement signal, or starts the measurement signal and The transmission of the synchronization signal.
  • a method for configuring a small cell including: after performing a positioning process, the UE reports location information of performing location acquisition to the base station; Signaling of the cell configuration, where the small cell configured for the UE is indicated in the signaling.
  • the method further includes: the UE receiving the signaling sent by the base station to perform a positioning process, or the UE periodically performing the positioning process according to a preset condition.
  • a configuration apparatus for a small cell includes: an acquiring module, configured to acquire location information of the UE; and a selecting module, configured to select according to the location information of the UE a small cell configured for the UE; a notification module, configured to notify the selected small cell, notify the selected small cell to send a measurement signal, and notify the UE of the small cell configured for the UE .
  • the notification module is further configured to: before the base station acquires the location information of the UE, notify the UE to perform a positioning process, to receive the location information of the UE reported by the UE.
  • the apparatus further includes: a determining module, configured to determine whether the selected small cell has initiated transmission of a measurement signal, and if yes, notifying the notification module not to notify the selected small cell to send a measurement signal, Only the small cell configured for the UE is notified to the UE.
  • the selecting module is configured to select a small cell configured for the UE according to the location information of the UE, and the predetermined information, where the predetermined information includes: location information of the small cell.
  • the selecting module includes: a calculating unit, configured to calculate a distance between the small cell and the UE according to the location information of the small cell and the location information of the UE; and the selecting unit is configured to select the distance is less than All or a predetermined number of small cells of a predetermined value are allocated to the UE.
  • the predetermined information further includes at least one of the following: a load information of the small cell, a link quality between the UE and the small cell, and a carrier aggregation capability of the UE; the selecting module further includes: determining a unit, configured to determine whether a load capacity of the small cell to be selected is allowed to access a new UE, if yes, determining that the small cell to be selected can be configured to the UE; otherwise, determining that the small cell to be selected cannot be configured Give the said And determining whether the link quality between the UE and the small cell to be selected meets a predetermined condition, and if yes, determining that the small cell to be selected can be configured to the UE, otherwise, determining The small cell to be selected cannot be configured to the UE; and/or, according to the carrier aggregation capability of the UE, it is determined that the number of small cells configured by the UE is not greater than the carrier indicated by the carrier aggregation capability.
  • a device for configuring a small cell includes: a reporting module, configured to report location information obtained by performing location acquisition to a base station after performing a positioning process;
  • the signaling is configured to receive the small cell configuration sent by the base station, where the small cell configured for the UE is indicated in the signaling.
  • the apparatus further includes: a first receiving module, configured to receive signaling that is sent by the base station to perform a positioning process; or, a preset positioning execution module, configured to periodically perform a positioning process according to a preset condition.
  • the device further includes: a measurement module, configured to perform measurement on the small cell configured to itself; the reporting module is further configured to report the measurement result of the measurement module.
  • a device for transmitting a small cell measurement signal is provided, where the small cell includes: a receiving module, configured to receive a notification signal sent by the base station; and a sending module, configured to send the measurement signal, or The measurement signal and the synchronization signal are transmitted.
  • the receiving module receives the notification signal sent by the base station
  • the small cell remains in a closed state, and after the receiving module receives the notification signal, the small cell starts sending a measurement signal, or starts a location. The measurement signal and the transmission of the synchronization signal.
  • the base station obtains the location information of the UE by notifying the UE to perform the positioning process, selects the small cell configured for the UE according to the location information of the UE, notifies the selected small cell, and notifies the selected small cell to the UE.
  • the problem that the UE under the macro cell in the related art finds the small cell under the macro cell is solved, so that the small cell can be configured to the UE regardless of whether the small cell is closed, and the base station only informs the small configuration for the UE.
  • the cell can help the network side to save power.
  • FIG. 5 is a schematic structural diagram of a configuration apparatus of a small cell according to a fourth embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a configuration apparatus of a small cell according to a preferred embodiment of the fourth embodiment of the present invention
  • 7 is a schematic structural diagram of a configuration apparatus of a small cell according to another preferred embodiment of Embodiment 4 of the present invention
  • FIG. 8 is a schematic structural diagram of a configuration apparatus of a small cell according to Embodiment 5 of the present invention
  • FIG. 10 is a schematic structural diagram of a small cell measurement signal transmitting apparatus according to Embodiment 6 of the present invention
  • FIG. 11 is a schematic diagram of a small cell measurement signal transmitting apparatus according to Embodiment 6 of the present invention.
  • BEST MODE FOR CARRYING OUT THE INVENTION the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. After the small cell is introduced, especially for the small cell of the new carrier type, the small cell of the new carrier type does not need to be supported.
  • the UE resides.
  • This feature of the new carrier type small cell in the embodiment of the present invention provides a configuration scheme of a small cell.
  • the small cell refers to a small cell of a new carrier type, and the method provided by the embodiment of the present invention can also be applied to a conventional small cell, because the method is not limited thereto.
  • a conventional small cell can also do not support UE camping by the prior art. Moreover, it can also be used for a small cell that supports UE camping, but it may have a certain impact on the capacity and mobility of the system.
  • FIG. 2 is a flowchart of a method for configuring a small cell according to an embodiment of the present invention. As shown in FIG.
  • a method for configuring a small cell mainly includes the following steps (step S202 - step S206): Step S202, the base station (that is, the base station controlling the macro cell) acquires location information of the UE; It should be noted that, the base station may notify the UE to perform the positioning process, and receive the location information of the UE, or the UE may report the location information by itself. For example, the UE periodically reports the location information of the base station, or the UE meets the requirements. When the condition is agreed, the location information of the UE is reported periodically, for example, when the UE moves at a high speed, the location information of the UE is reported periodically.
  • Step S204 The base station selects a small cell configured for the UE according to the location information of the UE.
  • Step S206 the base station notifies the selected small cell, notifies the selected small cell to send a measurement signal, or sends a measurement signal and And synchronizing the signal, and notifying the UE of the small cell configured for the UE.
  • the base station obtains the location information of the UE by notifying the UE to perform the positioning process, selects the small cell configured for the UE according to the location information of the UE, and notifies the selected small cell, and the selected small cell.
  • the UE is notified that the problem of the small cell discovery by the UE in the macro cell in the related art is solved, so that the small cell can be configured to the UE regardless of whether the small cell is closed, and the base station only informs the UE.
  • the configured small cell can help the network side to save power.
  • the method further includes: performing, by the UE, the measurement on the small cell configured to itself, and reporting the measurement result, The base station activates a small cell for the UE according to the measurement result.
  • the base station notifying the user equipment that the UE performs the positioning process may include: the base station notifying the UE to perform a positioning process based on the positioning reference signal, or notifying the UE to perform a positioning process based on the global positioning system.
  • the method before the base station notifies the selected small cell, the method further includes: when determining that the selected small cell has started transmitting the measurement signal, the base station does not notify the selected small cell to send The measurement signal only informs the UE of the small cell configured for the UE.
  • the notifying, by the base station, the small cell configured for the UE to the UE may include: the base station connecting to the macro resource (RRC, Radio Resource Control) of the macro cell by using the UE, The information bearer of the small cell configured for the UE is sent to the UE in dedicated RRC signaling.
  • RRC Radio Resource Control
  • the base station may select, according to the predetermined information, a small cell configured for the UE, where the predetermined information includes: location information of the small cell.
  • the base station selects a small cell configured for the UE according to the location information of the UE according to the location information of the small cell: the base station according to the location information of the small cell and the UE The location information is calculated, and the distance between the small cell and the UE is calculated, and all or a predetermined number of small cells whose distance is less than a predetermined value are selected and configured to the UE.
  • the foregoing predetermined information may further include at least one of: load information of the small cell, link quality between the UE and the small cell, and carrier aggregation capability of the UE.
  • the base station may further include: determining, by the base station, whether the load capability of the small cell to be selected is allowed to access, when selecting the small cell configured for the UE The new UE, if allowed, determines that the small cell to be selected can be configured to the UE, otherwise the base station determines that the small cell to be selected cannot be configured to the UE.
  • the base station may further include: the base station determining the UE and the to-be when selecting the small cell configured for the UE Whether the quality of the link between the selected small cells satisfies a predetermined condition.
  • the base station determines that the small cell to be selected can be configured to the UE. Otherwise, the base station determines that the small cell to be selected cannot be configured. To the UE.
  • the foregoing predetermined information includes the base station aggregation capability of the base station in combination with the UE, when the small cell configured for the UE is selected, the method further includes: the base station according to the UE The carrier aggregation capability is configured to configure, for the UE, a small cell that is less than or equal to the number of carriers indicated by the carrier aggregation capability.
  • the method further includes: the UE The small cell selected by the base station is measured and accessed according to a procedure of cell handover.
  • the measurement signals sent by the small cell include, but are not limited to, a channel state information reference signal (CSI-RS, Channel State Information-Reference Signal), or a cell reference signal (CRS, Cell-specific in the LTE R8 protocol). Reference Signal), or CRS of 5ms period introduced in LTE R12.
  • the base station may obtain the location information reported by the UE by using the following steps: Step 1: The base station sends signaling to the UE to notify the UE to perform positioning; Step 2, the UE receives After the signaling, the location information indicating the location of the UE corresponding to the location mode is obtained according to a predetermined positioning manner. Step 3: The UE reports the location information to the base station.
  • the base station notifying the user equipment that the UE performs the positioning process may include: the base station, by using the RRC connection between the UE and the macro cell, to notify the UE to perform signaling of the positioning process in dedicated RRC signaling. Transmitted to the UE.
  • the small cell before the base station notifies the selected small cell, the small cell remains in a closed state, so that the small cell is only enabled when it is most likely to be the serving cell of the UE, saving energy of the small cell. .
  • the small cell is a small cell that does not support UE camping.
  • the base station notifying the user equipment that the UE performs the positioning process may include: sending, by the base station, a periodic fixed channel agreed with the UE in advance or a preset preset resource agreed with the UE in advance. Signaling to notify one or more UEs to perform positioning.
  • the information carried in the signaling includes: an identifier of the UE, where the identifier of the UE includes: a cell-Radio Network Temporary Identifier of the UE (C-RNTI, Cell-Radio Network Temporary Identifier) Or the UE ID of the UE, where ID is an identifier.
  • the method further includes: detecting, by the UE, the identifier of the UE in signaling transmitted in the fixed channel or the preset resource. The UE determines that location needs to be performed, and the base station needs to configure a small cell for the UE.
  • the notifying, by the base station, that the selected small cell comprises: sending, by the base station, notification signaling to the selected small cell, where the notification signaling is by using a dedicated resource allocated for each small cell. And sending, by the base station, the notification signaling in the preset fixed channel or the preset resource, where the notification signaling carries the correspondence between the identifier of the UE and the identifier of the small cell configured for the UE.
  • the identifier of the small cell may include: an index number of the small cell, an ID of the small cell, a virtual ID of the small cell, or location information of the small cell.
  • the base station notifies the UE of the small cell configured by the UE to the UE, where: the base station sends information about the small cell configured for the UE to the UE, where The information of the small cell includes at least one of the following: an identifier of the small cell, a frequency of the small cell, an index in the small cell, and an index of the small cell in the subordinate of the base station.
  • the second embodiment of the present invention describes the technical solution provided by the embodiment of the present invention from the small cell side.
  • FIG. 3 is a flowchart of a method for transmitting a measurement signal of a small cell according to an embodiment of the present invention. As shown in FIG.
  • the method may include the following steps (step S302-step S304): Step S302: A small cell receives a transmission sent by a base station. a notification signal; step S304, the small cell transmits the measurement signal, or transmits the measurement signal and the synchronization signal.
  • Step S302 A small cell receives a transmission sent by a base station. a notification signal; step S304, the small cell transmits the measurement signal, or transmits the measurement signal and the synchronization signal.
  • the small cell before the small cell receives the notification signal sent by the base station, the small cell remains in a closed state, and after receiving the notification signal, the small cell initiates transmission of the measurement signal, or the small The cell initiates transmission of the measurement signal and the synchronization signal.
  • the UE may perform measurement on the small cell, and report the measurement result to the base station (ie, the macro base station).
  • FIG. 4 is a flowchart of a method for configuring a small cell according to an embodiment of the present invention. As shown in FIG. 4, the method mainly includes the following steps (step S402-step S408): Step S402, a user equipment (UE) receives a base station.
  • the UE (ie, the macro base station) sends a notification to perform the positioning process signaling; it should be noted that, in the implementation process, the UE here may also perform the positioning signaling without receiving the notification sent by the base station, and the UE performs positioning by itself, for example, The UE periodically or periodically performs the positioning process according to the agreed conditions, as described in the foregoing section.
  • Step S404 the UE is configured to perform a positioning process.
  • Step S406 The UE reports the location information of the location acquisition to the base station.
  • Step S408 The UE receives the signaling of the small cell configuration sent by the base station, where the signaling is A small cell configured for the UE is indicated. In this embodiment, the signaling is sent by the base station after selecting the small cell configured by the UE according to the location information of the UE after acquiring the location information of the UE.
  • the UE After receiving the foregoing signaling, the UE performs a measurement process for the small cell configured for the UE, and reports the measurement result to the base station, and the base station determines whether to activate the small cell according to the measurement result.
  • the operations performed by the UE, the base station, and the small cell are described in the first embodiment, and are not described in this embodiment.
  • Embodiment 4 The embodiment of the present invention provides a configuration apparatus for a small cell, where the apparatus may be located at a base station, and is used to perform operations performed by a base station in the foregoing embodiments.
  • FIG. 5 is a schematic structural diagram of a configuration apparatus of a small cell according to an embodiment of the present invention. As shown in FIG.
  • the apparatus is located at a base station, and includes: an obtaining module 50, configured to acquire location information of the UE; and a selection module 52, configured to The location information of the UE is selected as a small cell configured by the UE.
  • the notification module 54 is configured to notify the selected small cell, notify the selected small cell to send a measurement signal, and configure the UE for the UE.
  • the small cell is notified to the UE.
  • the notification module 54 is further configured to notify the UE to perform a positioning process to receive the location information reported by the UE before the base station acquires the location information of the UE.
  • the location information of the UE is obtained by the acquiring module 50, so that the small cell is configured for the UE, so that the UE can be discovered by the UE regardless of whether the small cell is enabled, and since the device is only enabled, the device is most likely to be The small cell served by the UE avoids the opening of other unrelated small cells, which helps the network side to save power.
  • the apparatus may further include: a determining module 56, configured to determine whether the selected small cell has initiated transmission of a measurement signal, and if yes, notify the The notification module 54 does not notify the selected small cell to send a measurement signal, and only informs the UE of the small cell configured for the UE.
  • the selecting module 52 selects a small cell configured for the UE according to the location information of the UE, and may also perform selection according to predetermined information, where the predetermined information includes: location information of the small cell.
  • the selecting module 52 may include: a calculating unit 522, configured to calculate a distance between the small cell and the UE according to the location information of the small cell and the location information of the UE;
  • the selecting unit 524 is configured to select all or a predetermined number of small cells whose distance is less than a predetermined value to be allocated to the UE.
  • the foregoing predetermined information may further include at least one of the following: load information of the small cell, link quality between the UE and the small cell, and carrier aggregation capability of the UE;
  • the selection module 52 further includes: a determining unit 526, configured to determine whether a load capability of the small cell to be selected is allowed to access a new UE, and if allowed, determining that the small cell to be selected can be configured to the UE, Otherwise, determining that the small cell to be selected cannot be configured to the UE; and/or, determining whether the link quality between the UE and the small cell to be selected meets a predetermined condition, and if yes, determining the to-be-determined The selected small cell can be configured to the UE, otherwise, it is determined that the small cell to be selected cannot be configured to the UE; and/or, configured to determine that the UE is configured according to the carrier aggregation capability of the UE.
  • the number of cells is not greater than the number of carriers indicated by the carrier aggregation capability.
  • the selection unit 524 in the selection module 52 is a selection made according to the output of the calculation unit 522 and the determination unit 526.
  • the foregoing apparatus in this embodiment may perform operations on the base station side according to the methods described in the foregoing Embodiments 1 to 3, and details are not described herein.
  • Embodiment 5 According to an embodiment of the present invention, another apparatus for configuring a small cell is further provided, where the apparatus may be located in a UE, and performs operations performed by the UE in the foregoing Embodiments 1 to 3.
  • FIG. 8 is a schematic structural diagram of a configuration apparatus of a small cell according to the embodiment.
  • the apparatus may include: a reporting module 84, configured to report, to the base station, position information obtained by performing positioning after performing the positioning process;
  • the receiving module 86 is configured to receive the signaling of the small cell configuration sent by the base station, where the signaling indicates a small cell configured for the UE.
  • the UE may also perform the measurement. Therefore, as shown in FIG. 9, in an embodiment, the device may further include: a measuring module 88, setting To perform measurement on the small cell configured for itself; the reporting module 84 is further configured to report the measurement result of the measurement module.
  • the apparatus further includes: a first receiving module 80, configured to receive signaling that is sent by the base station to perform a positioning process; or, the preset positioning execution module 82 is configured to periodically perform positioning according to a preset condition. process.
  • the foregoing apparatus in this embodiment may perform operations on the UE side according to the methods described in the foregoing Embodiments 1 to 3, and details are not described herein.
  • Embodiment 6 According to an embodiment of the present invention, a device for transmitting a small cell measurement signal is further provided, where the device is located in a small cell, and may be used to perform operations performed by the small cells in the foregoing Embodiments 1 to 3.
  • the device may include: a receiving module 1000 configured to receive a notification signal sent by a base station; a sending module 1002, and a receiving module 1000 Coupling, set to send measurement signals, or to send measurement signals and synchronization signals.
  • the receiving module 1000 before the receiving module 1000 receives the notification signal sent by the base station, the small cell remains in a closed state, and after the receiving module 1000 receives the notification signal, the small cell starts a measurement signal. Send, or initiate the transmission of measurement signals and synchronization signals.
  • the base station determines that the small cell transmission data needs to be configured for the UE, the following steps are performed: Step S1101, the base station notifies the UE to perform positioning to obtain location information of the UE; Step S1102 The UE performs positioning and reports the location information of the UE.
  • the base station selects a small cell according to the location information of the UE and the location information of the small cell (the deployment location of the small cell may be pre-configured on the base station side), where the base station is mainly Refer to the distance between the UE and the center of the small cell, for example, whether the UE is within the coverage of the small cell.
  • Step S1103 The base station notifies the small cell configured for the UE, and notifies the small cell configured to send the measurement signal to the UE (equivalent to enabling the small cell for the UE);
  • Step S1104 The base station notifies the UE of the small cell configured for the UE.
  • the base station transmits the signaling that notifies the UE to perform the positioning process to the UE by using the dedicated RRC signaling bearer by using the RRC connection between the UE and the macro cell.
  • This step can be performed simultaneously with step S1103.
  • Step S1105 The UE performs measurement on the small cell configured to it and reports the same.
  • Step S1106 The base station activates a suitable small cell for the UE according to the measurement result reported by the UE.
  • the base station when the base station selects a suitable small cell for the UE, in addition to selecting a suitable small cell for the UE according to the UE location information and the small cell location information, the base station may further pass the following one or The multiple information further filters a suitable small cell, and the information includes: load information of the small cell, link quality of the UE and the small cell, and carrier aggregation capability of the UE.
  • the base station refers to the small cell location information and the UE location information, selects some small cells that cover the UE and the neighbors, and then the base station determines the load conditions in the small cells. Once the load of the small cell is found to be large, the access cannot be continued.
  • the base station may choose not to configure this small cell to the UE.
  • the base station selects a small cell for the UE by using the UE and the small cell location information
  • the base station calculates the distance between the small cell and the UE according to the location information of the small cell and the location information reported by the UE, and selects a distance smaller than a certain range for the UE.
  • Small cell or a fixed number of small cells with a small distance. Since the accuracy of the UE positioning is not very accurate, the distance less than a certain range can be determined to be less than the sum of the 2 small cell radii.
  • N small cells with a small distance are selected for the UE configuration, and N is determined according to the carrier aggregation capability of the UE, and may generally be greater than the carrier aggregation capability, because this is a preliminary selection, so it may be more.
  • the small cell load information it is mainly to determine whether the small cell has additional load capacity to provide services for the UE, and if so, it can be configured to the UE.
  • the small cell load information may also be used after the UE performs measurements on the configured small cell.
  • the base station determines whether the link quality of the small cell satisfies the requirement. If yes, the base station can configure the small cell to the UE.
  • the base station cannot configure the small cell to the UE. This can also be used after the UE performs measurements on the configured small cell.
  • the UE can support the aggregation of a maximum of several carriers at the same time, and the base station should configure the number of carriers that are less than or equal to the aggregation capability for the UE.
  • the UE does not have the carrier aggregation capability, after the base station configures the small cell for the UE, the UE performs the measurement of the small cell and the access after the activation of the small cell according to the procedure of the cell handover.
  • the UE After the base station selects a suitable small cell configuration for the UE according to the location information of the UE, the UE performs measurement on the small cell configured for itself (the measurement may be a related measurement specified in LTE), and reports the measurement result to the base station, and the base station performs measurement according to the measurement.
  • the result is that the UE activates the configured small cell, and sends the activated signaling to the small cell and the UE, and the activated small cell can provide the service for the UE.
  • the eNB notifies the UE to perform the locating process, and the specific locating may be performed in a plurality of different manners.
  • the reference signal-based positioning manner introduced in the LTE may be used to perform the UE positioning process, such as PRS, or may be provided by using the global positioning system in LTE.
  • Location information such as GPS.
  • the format, format, and meaning of the location information reported by the UE are different.
  • the main base station can interpret it.
  • the small cell selected by the base station for the UE may also be serving other UEs, the small cell may be transmitting the measurement signal, and the base station does not notify the small cell to send the measurement signal, and the small cell configured for the UE needs to be configured in the base station. Notify the UE.
  • the base station transmits the small cell information configured for the UE to the UE by using a dedicated RRC signaling bearer by using the RRC connection between the UE and the macro cell.
  • the measurement signals sent by the small cell include, but are not limited to, the following reference signals: CSI-RS, CRS in the LTE 28 protocol, or CRS in a 5 ms period.
  • the signaling that the base station notifies the UE to perform positioning may send, by using a periodic fixed channel/preset resource, signaling of one or more UEs for notifying the UE to perform positioning, where the signaling includes at least the UE.
  • the specific UE identifier may be represented by a C-RNTI or a UE-ID.
  • the UE When the UE receives its own identification information in the fixed channel or the preset resource, it indicates that the UE needs to perform positioning, and further may indicate that the base station There is a need to configure a small cell for the UE.
  • the base station notifies that the signaling of the small cell configured for the UE includes (if an air interface is adopted): a dedicated resource allocated for each small cell to notify each small cell; or transmits one or more small cells in a fixed channel/preset resource.
  • the signaling component of the latter includes a small cell identifier and a UE identifier. At this time, in the signaling format, it is necessary to reflect which small cells are configured for which UEs.
  • small cell 1 ⁇ UEK UE2... ⁇ ; small cell 2: ⁇ UEK UE3... ⁇ , in this case, small cell 1 and small cell 2 are configured for UE1; small cell 1 is UE2 is configured; small cell 2 is configured for UE3.
  • the small cell identifier may be specifically represented by one of the following: a small cell index number, a small cell physical cell ID, a small cell virtual cell ID, and small cell location information.
  • the base station is configured to notify the UE that the signaling configured by the UE is: at least one or more of the subordinates: a small cell identifier, a small cell frequency point, and a small cell index (refer to an index used by the small cell set configured for the UE)
  • the index of the small cell subordinate to the base station refer to the index of the small cell set controlled by the base station in the entire macro cell.
  • Embodiment 8 For the hetero-frequency heterogeneous network, the deployment of the macro cell and its subordinate small cells is as shown in FIG. 1 . In this embodiment, when the network is deployed, at least one carrier of the macro cell uses a compatible carrier type to provide a larger coverage.
  • the carrier of the small cell subordinate to the macro cell adopts a new carrier type and is deployed in the hotspot area to provide high data representation for the user.
  • the small cell subordinate to the macro cell remains closed (ie, the air interface does not send and receive information).
  • the base station notifies the UE to perform the positioning process when the base station decides to configure the small cell for the UE according to the scheduling requirement.
  • the specific positioning mode may be agreed in advance or signaling.
  • the UE After receiving the signaling of the positioning process, the UE performs the positioning according to the required manner, and reports the location information obtained by performing the positioning process to the macro cell, where the macro cell needs to save the location information of the subordinate small cell, and then the macro cell reports according to the UE.
  • the location information and the location information of the small cell subordinate to the macro cell are selected for the small cell in the vicinity of the UE. For example, several small cells that select a smaller distance according to the distance between the UE and the small cell center are configured for the UE, and The base station activates the selected small cell and notifies the selected small cell to transmit the measurement signal, and actually tells the selected small cell that it has been configured for the UE.
  • the base station only informs that these small cells have been configured for the UE.
  • the process of configuring a small cell for the UE by the macro cell is implemented, so that the UE can obtain a small cell, and further, which small cell is used by the UE to provide services for itself, and can further perform measurement (which is RRM measurement) by the UE, and report the measurement.
  • the base station of the macro cell determines to activate those small cells for the UE according to the measurement result, the load condition of the corresponding small cell, the UE aggregation capability, and the like.
  • Embodiment 9 In an inter-frequency heterogeneous network, in this embodiment, a macro cell and its subordinate small cells are as shown in FIG. 1.
  • the case where the carrier type of the small cell is deployed to be a compatible carrier type is also performed according to the embodiment provided by the embodiment of the present invention.
  • the small cell implements a method of blocking UE access, thereby preventing the UE in the idle state from accessing the small cell.
  • the small cell may be implemented by using the cellBarred parameter in the system broadcast information. In a specific implementation manner, it is first required to determine that a UE with no connection status in a small cell that is compatible with a carrier can be configured to block UE access to a small cell that is compatible with the carrier.
  • the small cell compatible with the carrier When the small cell compatible with the carrier implements blocking UE access, it needs to remain open for the macro cell.
  • the small cell subordinate to the macro cell remains closed (ie, the air interface does not send and receive information).
  • the base station For the UE working in the macro cell, the base station notifies the UE to perform the positioning process when the base station decides to configure the small cell for the UE according to the scheduling requirement.
  • the specific positioning mode may be agreed in advance or signaling.
  • the UE After receiving the signaling of the positioning process, the UE performs the positioning according to the required manner, and reports the location information obtained by performing the positioning process to the macro cell, where the macro cell needs to save the location information of the subordinate small cell, and then the macro cell reports according to the UE.
  • the location information and the location information of the small cell subordinate to the macro cell are selected for the small cell in the vicinity of the UE. For example, several small cells that select a smaller distance according to the distance between the UE and the small cell center are configured for the UE, and The base station activates the selected small cell, and the activated small cell needs to cancel the identifier for blocking the access of the UE, and notifies the selected small cell to send the measurement signal, and actually tells the selected small cell that the UE has been selected as the UE. Configuration. If the selected small cell happens to be on and the measurement signal is being transmitted, then the base station only informs that these small cells have been configured for the UE.
  • the process of configuring the small cell for the UE by the macro cell is implemented, so that the UE can obtain the small cell, and further the small cell used by the UE to provide services for itself, and the UE can further perform radio resource management (RRM) for the small cell.
  • the radio resource Measure measures and reports the measurement result, and the base station of the macro cell determines, according to the measurement result, the load condition of the corresponding small cell, the UE aggregation capability, and the like, to activate those small cells for the UE.
  • the small cell is a compatible carrier and supports camping.
  • the small cell For a small cell compatible with the carrier type, the small cell needs to be kept open to provide the necessary services for the UEs that need to be camped, and the small cells that provide the camping are generally required to keep transmitting measurement signals to help the UE perform necessary measurements for the cell weight. selected.
  • the base station For the UE working in the macro cell, the base station notifies the UE to perform the positioning process when the base station decides to configure the small cell for the UE according to the scheduling requirement.
  • the specific positioning mode may be agreed in advance or signaling.
  • the UE After receiving the signaling of the positioning process, the UE performs the positioning according to the required manner, and reports the location information obtained by performing the positioning process to the macro cell, where the macro cell needs to save the location information of the subordinate small cell, and then the macro cell reports according to the UE.
  • the location information and the location information of the small cell subordinate to the macro cell are selected for the small cell in the vicinity of the UE. For example, several small cells that select a smaller distance according to the distance between the UE and the small cell center are configured for the UE.
  • the base station notifies the selected small cell that it has been configured for the UE. If the small cell does not send the measurement signal, the small cell starts to send the measurement signal after receiving the configuration signaling of the base station.
  • the process of configuring the small cell for the UE by the macro cell is implemented, so that the UE can obtain the small cell, and further the small cell used by the UE provides services for itself, and can further pass the UE to the small cell.
  • the base station of the macro cell determines, according to the measurement result, the load condition of the corresponding small cell, the UE aggregation capability, and the like, to activate those small cells for the UE.
  • the base station obtains the location information of the UE by notifying the UE to perform the positioning process, selects the small cell configured for the UE according to the location information of the UE, and notifies the selected small cell. And notifying the UE of the selected small cell, and solving the problem that the UE under the macro cell in the related art finds the small cell under the macro cell, so that the small cell can be configured to the UE regardless of whether the small cell is closed, and Because the base station only informs the small cell configured for the UE, it can help the network side to save power.
  • the UE may report the location information to the network side node by itself, for example, the UE reports in a specified time, or the UE reports its location information according to a given period, or The UE reports its own location information periodically in a specific case (for example, when moving at a high speed), and the base station (or other node, for example, a small cell) on the network side obtains the location information of the UE, and then proceeds according to the remaining steps.
  • This method can also be understood as the self-notification of the UE and the network side agreement to meet the given conditions.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un dispositif de configuration de petite cellule. Le procédé selon l'invention fait appel : à l'acquisition, par une station de base, d'informations de localisation concernant un équipement d'utilisateur (UE) ; en fonction des informations de localisation concernant l'UE, à la sélection, par la station de base, d'une petite cellule configurée pour l'UE ; et à l'envoi d'une notification, par la station de base et à la petite cellule sélectionnée, indiquant à la petite cellule sélectionnée d'envoyer un signal de mesure, et à l'envoi d'une notification à l'UE informant de la petite cellule configurée pour l'UE. La présente invention peut être appliquée pour réaliser une configuration de petite cellule et économiser de l'électricité côté réseau.
PCT/CN2013/083460 2012-09-14 2013-09-13 Procédé et dispositif de configuration de petite cellule WO2014040558A1 (fr)

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CN106535319A (zh) * 2015-09-10 2017-03-22 北京信威通信技术股份有限公司 一种lte集群系统中的定位方法
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CN105916170B (zh) * 2016-04-19 2019-02-01 宇龙计算机通信科技(深圳)有限公司 授权频谱的终端化小小区配置方法、相关设备及系统
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