WO2014048182A1 - Procédé, dispositif et système permettant de fournir à un ue un service par petite cellule - Google Patents

Procédé, dispositif et système permettant de fournir à un ue un service par petite cellule Download PDF

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Publication number
WO2014048182A1
WO2014048182A1 PCT/CN2013/081506 CN2013081506W WO2014048182A1 WO 2014048182 A1 WO2014048182 A1 WO 2014048182A1 CN 2013081506 W CN2013081506 W CN 2013081506W WO 2014048182 A1 WO2014048182 A1 WO 2014048182A1
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WO
WIPO (PCT)
Prior art keywords
small cell
base station
management entity
uplink data
cell management
Prior art date
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PCT/CN2013/081506
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English (en)
Chinese (zh)
Inventor
苟伟
夏树强
鲁照华
Original Assignee
中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2014048182A1 publication Critical patent/WO2014048182A1/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
    • H04W48/16—Discovering, processing access restriction or access information
    • 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

  • the present invention relates to the field of communications, and in particular, to a method, device, and system for implementing a small cell as a user equipment (UE).
  • Background technique
  • a small cell In the current Long Term Evolution (LTE), in order to better solve the UE communication in the local hotspot area and improve the spectrum efficiency, a small cell (small cell) is introduced.
  • the small cell is characterized by a small coverage (tens of meters in radius), low transmission power, and high deployment density.
  • the small cell is relative to the macro cell.
  • the macro cell generally covers a large area (with a radius of more than 500 meters), and the transmission power is high.
  • the macro cell can use the same or different frequency as the small cell. For the case of using different frequencies, the macro cell generally uses a lower frequency band to better provide a larger range of coverage; the small cell generally uses a higher frequency band to provide high-speed data services.
  • FIG. 1 is a schematic diagram of a typical macro cell and a small cell.
  • the macro cell uses the frequency fl and the small cell uses the frequency f2.
  • the management of the small cell may be implemented by the base station controller or by other independent entities, and the base station and the entity managing the small cell may interact with each other.
  • the UE 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, which brings disadvantages to the UE. influences:
  • the power consumption of the UE side increases;
  • LTE R11 phase for frequency New demands are placed on spectrum resource utilization, network energy conservation, and interference suppression between cells.
  • a new carrier type is proposed.
  • the new carrier has a distinctive feature that does not require backward compatibility when designing.
  • the carrier in the small cell is configured as a new carrier type, and in some cases, the management entity of the small cell can be effectively saved. For example, the management entity of the small cell can be shut down when there is no serving UE, thereby helping the network side. Energy saving, but how the managed entity of the closed small cell is discovered by the UE, how to configure the small cell for the UE, and how to select and activate the management entity of the appropriate small cell for the UE, there is currently no specific implementation. Summary of the invention
  • the main purpose of the embodiments of the present invention is to provide a method, a device, and a system for implementing a small cell serving a UE, so as to solve a small cell discovery problem in a macro cell.
  • a method for implementing a small cell serving a user equipment UE includes:
  • the base station triggers the subordinate', and the cell management entity receives the uplink data
  • the base station learns the quality of the uplink data reported by the small cell management entity, and determines the small cell to be configured according to the quality.
  • the method further includes:
  • the base station notifies the UE and/or the corresponding small cell management entity of the small cell information of the small cell.
  • the signaling when the base station notifies the small cell management entity includes: a UE identifier, and a small cell identifier i;
  • the signaling when the base station notifies the UE includes one or more of the following: a small cell identifier, a small cell frequency point, a small cell index, and an index of a small cell of the base station;
  • the small cell information includes one or more of the following contents: a small cell identifier, a small cell frequency point, and a small cell index;
  • the UE identifier is represented by one of the following: a C-RNTI cell RNTI, a resource location for receiving uplink data, a UE ID, configuration information of uplink data, configuration information or an index of an uplink reference signal;
  • the small cell identifier is represented by one of the following: a small cell index, a small cell physical cell ID, a small cell virtual cell ID, a small cell location information, and a small cell frequency point.
  • the base station When the base station triggers the subordinate small cell management entity to receive the uplink data, the base station notifies the small cell management entity to receive the related information that the UE sends the uplink data.
  • the related information of the uplink data includes one or more of the following: resource information of the uplink data, coding information, carrier frequency point information, uplink data type, and UE identifier.
  • the base station learns the quality of the uplink data reported by the small cell management entity, and includes performing channel quality assessment on the uplink data:
  • the small cell management entity performs channel quality evaluation on the received UE uplink data according to an agreed manner, and reports the evaluation result to the base station;
  • the base station receives the UE uplink data forwarded by the cell management entity, and evaluates the received uplink data.
  • the method for the small cell management entity to perform the channel quality assessment is:
  • the small cell management entity determines the channel quality by judging whether the received uplink data can be correctly demodulated, or the small cell management entity determines the channel quality by calculating the received power of the received uplink data.
  • the base station For the small cell management entity that does not report the channel quality, the base station considers that the small cell corresponding to the small cell management entity is inappropriate for the UE.
  • the method further includes:
  • the base station For a small cell that is suitable for the UE, the base station sends a small cell configuration signaling to the small cell management entity of the small cell, and notifies the small cell management entity that the corresponding small cell has been configured for the UE.
  • the method further includes: Receiving, by the small cell management entity that receives the small cell configuration signaling, a measurement signal; and/or, the base station sends d, cell activation signaling to the d, the cell management entity.
  • the method for the base station to trigger the subordinate small cell management entity is:
  • the base station sends a trigger signal to the small cell management entity through the X2 port or the downlink carrier of the base station.
  • the UE capable of performing data interaction with the base station further establishes a radio resource control RRC connection with the base station;
  • the small cell management entity capable of receiving uplink data is turned off before being triggered by the base station, or is kept open for other UEs;
  • the uplink data is uplink data sent by the UE to the base station, or uplink data sent by the UE through an uplink carrier of the macro cell controlled by the base station; the uplink data includes: a physical uplink control channel PUCCH or a physical uplink shared channel Control signaling or uplink reference signal or user data sent by PUSCH
  • a method for implementing a small cell serving a UE includes:
  • the small cell management entity receives the information for triggering the small cell management entity to receive the uplink data, receives the uplink data according to the information, and processes the received uplink data, and sends the processing result;
  • the small cell management entity receives the small cell configuration signaling, and learns whether the small cell corresponding to the small cell management entity is allocated.
  • the small cell management entity forwards the received uplink data to the base station, and the base station performs channel quality evaluation on the uplink data, and determines whether the small cell corresponding to the small cell management entity can be configured for the UE; or
  • the small cell management entity performs channel quality assessment on the received uplink data according to an agreed manner, and sends the evaluation result to the base station.
  • the small cell management entity determines the channel shield by determining whether the received uplink data can be correctly demodulated, or the small cell management entity determines the received power of the received uplink data by performing the channel shield estimation according to the agreed manner. Channel quality.
  • the base station When the base station does not receive the evaluation result sent by the small cell management entity, the base station considers that the small cell corresponding to the small cell management entity cannot be configured for the UE.
  • the method further includes:
  • the base station sends a small cell configuration signaling to the small cell management entity to notify the small cell management entity that the corresponding small cell has been configured for the UE; or, the base station manages according to the received small cell.
  • the result of the uplink data processing sent by the entity determines that the small cell corresponding to the small cell management entity is configured for the UE, and sends the small cell configuration signaling to notify the small cell management entity that the corresponding small cell has been configured for the UE.
  • the small cell management entity further sends a measurement signal after receiving the small cell configuration signaling, and/or the small cell management entity receives the small cell activation signaling sent by the base station to serve the UE.
  • the method further includes:
  • the compensation channel is used to calibrate the calculated channel quality or power
  • the compensation factor is a fixed value and is obtained by simulation or empirical value.
  • a method for implementing a small cell serving a UE includes:
  • the UE establishes an RRC connection with the macro cell controlled by the base station, and sends uplink data by using the uplink carrier of the macro cell;
  • the UE receives signaling of the configured small cell that the base station sends through the downlink carrier of the macro cell.
  • the method further includes:
  • the UE receives the measurement signal sent by the small cell management entity of the small cell configured by itself, and feeds back the measurement result to the base station.
  • the method further includes:
  • the UE receives signaling of the activated small cell management entity sent by the base station.
  • the uplink data is the agreed uplink data sent by the UE after receiving the trigger signaling of the base station.
  • a device for enabling a small cell to serve a UE configured to trigger a subordinate small cell management entity to receive uplink data; and to learn the quality of the uplink data reported by the small cell management entity, and then determine a small cell to be configured according to the quality.
  • the device is further configured to:
  • the signaling when the device notifies the small cell management entity includes: a UE identifier, a small cell identifier;
  • the signaling when the apparatus notifies the UE includes one or more of the following: a small cell identifier, a small cell frequency point, a small cell index, and an index of a small cell of the base station;
  • the small cell information includes one or more of the following contents: a small cell identifier, a small cell frequency point, and a small cell index;
  • the UE identifier is represented by one of the following: a C-RNTI, a resource location for receiving uplink data, a UE ID, configuration information of uplink data, configuration information or an index of an uplink reference signal;
  • the small cell identifier is represented by one of the following: a small cell index, a small cell physical cell ID, a small cell virtual cell ID, a small cell location information, and a small cell frequency point.
  • the device When the device triggers the subordinate small cell management entity to receive the uplink data, the device is configured to notify the small cell management entity to receive related information that the UE sends the uplink data, and the related information of the uplink data includes the following content.
  • the related information of the uplink data includes the following content.
  • resource information of the uplink data coding information, carrier frequency point information, uplink data type, UE identity.
  • the device When the device learns the quality of the uplink data reported by the small cell management entity, the device is configured to perform channel quality assessment on the uplink data: The triggering small cell management entity performs channel quality evaluation on the received UE uplink data according to an agreed manner, and reports the evaluation result to the device; or
  • the device receives UE uplink data forwarded by the small cell management entity, and evaluates the received uplink data.
  • the small cell management entity When performing the channel quality assessment, the small cell management entity is configured to: determine channel quality by determining whether the received uplink data can be correctly demodulated, or determine channel quality by calculating received power of the received uplink data. .
  • the device For the small cell management entity that does not report the channel quality, the device is configured to consider that the small cell corresponding to the small cell management entity is not suitable for the UE configuration.
  • the device is further configured to:
  • the small cell configuration signaling is sent to the small cell management entity of the small cell, and the small cell management entity is notified that the corresponding small cell has been configured for the UE.
  • the device is further configured to:
  • the configuration is:
  • a trigger signal is sent to the small cell management entity through the X2 port or the downlink carrier of the device.
  • the UE capable of data interaction with the device has established an RRC connection with the base station before performing the triggering;
  • the small cell management entity capable of receiving uplink data is turned off before being triggered by the device, or remains open for other UEs;
  • the uplink data is the uplink data sent by the UE to the base station, or the uplink data sent by the UE through the uplink carrier of the macro cell controlled by the base station; the uplink data includes: control signaling or uplink reference signal sent by using the PUCCH or the PUSCH. Or user data.
  • the device is a base station.
  • a device for implementing a small cell serving a UE configured as:
  • Receiving information for triggering the apparatus to receive uplink data receiving the uplink data according to the information, processing the received uplink data, and transmitting the processing result;
  • the small cell configuration signaling is received, and it is learned whether the small cell corresponding to the device is allocated.
  • the device After receiving the uplink data, the device is configured to:
  • the apparatus when the channel shield quantity evaluation is performed according to the agreed manner, the apparatus is configured to determine the channel quality by determining whether the received uplink data can be correctly demodulated, or to determine the channel quality by calculating the received power of the received uplink data.
  • the base station When the base station does not receive the evaluation result sent by the device, the base station is configured to consider that the small cell corresponding to the device cannot be configured for the UE.
  • the base station is configured to:
  • the small cell configuration signaling is sent to the device, and the device is notified that the corresponding small cell has been configured for the UE; or, according to the received uplink data processing sent by the device As a result, it is determined that the small cell corresponding to the device is configured for the UE, and the small cell configuration signaling is sent to notify the device that the corresponding small cell has been configured for the UE.
  • the device After the device receives the small cell configuration signaling, the device is further configured to send a measurement signal; and/or, receive the small cell activation signaling sent by the base station to serve the UE.
  • the device is configured to calibrate the calculated channel shield or power by using a compensation factor when calculating the channel quality or power of the received uplink data;
  • the compensation factor is a fixed value and is obtained by simulation or empirical value.
  • the device is a small cell management entity.
  • a device for implementing a small cell serving a UE configured as:
  • the device is further configured to:
  • the measurement signal sent by the small cell management entity of the small cell configured for itself is received, and the measurement result is fed back to the base station.
  • the device is further configured to:
  • the uplink data is the predetermined uplink data that is sent by the device after receiving the trigger signaling of the base station.
  • the device is a UE.
  • a method for implementing a small cell serving a UE includes:
  • the base station triggers the subordinate small cell management entity to transmit the measurement signal by using the downlink frequency of the base station; the base station receives the measurement result for the small cell, and accordingly determines the small cell to be configured.
  • the method for determining the small cell to be configured is: the base station selects a suitable small cell from the small cell reported by the UE to configure the UE.
  • the method further includes:
  • the base station triggers the small cell management entity of the small cell configured to send the measurement signal in the downlink frequency of the small cell; the base station notifies the UE of the configured small cell.
  • the method further includes:
  • the UE receives the measurement signal sent by the small cell management entity on the downlink frequency of the small cell, and reports the measurement result to the base station, and the base station selects a suitable small cell for the UE to perform activation according to the measurement result.
  • a system for implementing a small cell to serve a UE including a base station and a small cell management entity, where the base station is configured to trigger a subordinate small cell management entity to receive uplink data sent by the UE; and, to learn the small cell management entity, Determining the quality of the uplink data, and determining a small cell configured for the UE according to the quality;
  • the small cell management entity is configured to receive, by the base station, information for triggering the small cell management entity to receive uplink data of the UE, receive uplink data of the UE according to the information, and process the received uplink data, and the processing is performed.
  • the result is sent to the base station; and the small cell configuration signaling sent by the base station is received, and it is learned whether the small cell corresponding to the small cell management entity is configured for the UE.
  • the small cell management entity that receives the small cell configuration signaling is further configured to send a measurement signal and/or,
  • the base station is further configured to send small cell activation signaling to the small cell management entity.
  • the system further includes a UE, configured to establish an RRC connection with the macro cell controlled by the base station, and send the uplink data by using the uplink carrier of the macro cell; and receive signaling for configuring the small cell sent by the base station by using the downlink carrier of the macro cell.
  • the technology for implementing the small cell to serve the UE can solve the problem of small cell discovery in the macro cell, so as to configure the small cell for the UE, and the network side and the UE have obvious energy saving effects.
  • FIG. 1 is a schematic diagram of a communication principle between a macro cell and a small cell
  • FIG. 2 is a flowchart of a small cell serving a UE according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a small cell serving a UE according to another embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a small cell serving a UE according to an embodiment of the present invention. detailed description
  • entities configured to manage small cells may be diverse, such as independent management entities, devices controlled by base stations, and the like.
  • the device controlled by the base station may be a Radio Radio Head (RRH), a smart antenna of a base station, or the like.
  • RRH Radio Radio Head
  • entities that manage small cells may be collectively referred to as small cell management entities.
  • the following base station triggers the small cell management entity to receive the small cell reception corresponding to the base station trigger.
  • the base station may trigger the subordinate small cell management entity to receive the uplink data sent by the UE, and receive the quality of the uplink data reported by the small cell management entity, and then determine the small cell configured for the UE according to the quality, and may also The small cell information of the small cell configured for the UE is notified to the UE and the corresponding small cell management entity.
  • the UE typically has established a Radio Resource Control (RRC) connection with the base station and is capable of data interaction with the base station.
  • RRC Radio Resource Control
  • the small cell management entity can receive uplink data sent by the UE, and the small cell management entity is usually turned off before being triggered by the base station, or remains open for other UEs.
  • the uplink data sent by the UE is the uplink data sent by the UE to the base station, or the uplink data sent by the UE through the uplink carrier of the macro cell controlled by the base station.
  • the uplink data may include: control signaling or uplink reference signal or user data transmitted through a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).
  • the uplink data may also be pre-agreed data.
  • the base station may notify the small cell management entity to receive the related information that the UE sends the uplink data, so that the small cell management entity can accurately receive and parse the Uplink data sent by the UE.
  • the related information of the uplink data includes one or more of the following: resource information, coding information, carrier frequency information, uplink data type, and UE identifier of the uplink data (refer to data corresponding to the data received by the small cell management entity) The identity of the UE).
  • the small cell management entity can perform channel quality evaluation on the received UE uplink data according to an agreed manner, and report the evaluation result to the base station. If the channel quality does not meet the requirements, the small cell management entity may not report the evaluation result to the base station.
  • the small cell management entity determines the channel shield by determining whether the received uplink data can be correctly demodulated, or the small cell management entity determines the channel amount by calculating the received power of the received uplink data. .
  • the base station may evaluate the uplink data when receiving the uplink data of the UE forwarded by the subordinate small cell management entity, and determine the small cell configured for the UE according to the evaluation result; or, the base station The small cell configured for the UE may be determined according to the channel quality of the uplink data reported by the small cell management entity. Thereafter, the base station may send small cell configuration signaling to the small cell management entity to notify the small cell management entity that the corresponding small cell has been configured for the UE. For a small cell management entity that does not report the channel quality, the base station may consider that the small cell corresponding to the small cell management entity is inappropriate for the UE.
  • the small cell management entity When the small cell management entity does not receive the signaling configured by the base station for the UE (for example, the small cell configuration signaling), the small cell management entity confirms that the corresponding small cell cannot be configured for the UE. In addition, after the small cell management entity determines that the corresponding small cell can be configured for the UE, the small cell management entity may send the measurement signal. Further, after the small cell management entity determines that the corresponding small cell can be configured for the UE, the base station can send the small cell activation signal to the small cell management entity.
  • the signaling configured by the base station for the UE for example, the small cell configuration signaling
  • the base station may send the trigger signaling to the small cell management entity through the X2 port or the downlink carrier of the base station.
  • the signaling that the base station notifies the small cell management entity to configure for the UE includes: a UE identifier, a small cell identifier (optional).
  • the signaling when the base station notifies the UE of the small cell information of the small cell configured for the UE includes the following One or more: a small cell identifier, a small cell frequency point, a small cell index (refers to an index used by a small cell set configured for the UE), and an index of a small cell of the base station (refers to a small cell controlled by the base station in the entire macro cell) The index of the collection).
  • the UE identifier may be represented by one of the following: a cell RNTI (C-RNTI), a resource location for receiving uplink data, a UE ID, configuration information of uplink data, configuration information or an index of an uplink reference signal.
  • C-RNTI cell RNTI
  • the small cell identifier may be represented by one of the following: a small cell index, a small cell physical cell ID, a small cell virtual cell ID, a small cell location information, and a small cell frequency point.
  • the small cell management entity may receive the information sent by the base station for triggering the small cell management entity to receive the uplink data of the UE, receive the uplink data of the UE according to the information, and process the received uplink data. Send the processing result to the base station. Then, the small cell management entity may further receive the small cell configuration signaling sent by the base station to learn whether the small cell corresponding to the ', ', and the area management entity is configured by the UE.
  • the initial state of the small cell management entity is normally set to off before being triggered by the base station; or the state of the small cell management entity is on and serving other UEs.
  • the uplink data is sent by the UE to the base station, or is uplink data sent by the UE on the uplink carrier frequency of the macro cell controlled by the base station.
  • the uplink data may also be the agreed uplink data sent by the UE after receiving the base station trigger signaling.
  • the information for receiving the uplink data of the UE includes one or more of the following: resource information of the uplink data, coding information, carrier frequency point information, uplink data type, and UE identifier.
  • the uplink data includes control signaling or uplink reference signals or user data transmitted through PUCCH or PUSCH.
  • the small cell management entity may forward the received uplink data to the base station, and the base station performs channel quality assessment on the uplink data, so as to determine whether the small cell corresponding to the small cell management entity can be UE configuration; or, the small cell management entity performs channel quality assessment on the received uplink data according to an agreed manner, and sends the evaluation result Send to the base station.
  • the small cell management entity may determine the channel quality by determining whether the received uplink data can be correctly demodulated, or the small cell management entity determines the channel quality by calculating the received power of the received uplink data.
  • the small cell management entity evaluates the channel measurement of the received uplink data as not satisfying the requirement, the evaluation result is not sent to the base station.
  • the base station does not receive the evaluation result sent by the small cell management entity, the base station considers that the small cell corresponding to the small cell management entity cannot be configured for the UE.
  • the base station may receive the uplink data of the UE forwarded by the small cell management entity and perform channel quality evaluation on the uplink data.
  • the base station may send the small cell configuration signaling to the small cell management entity to notify the small The cell management entity has its corresponding small cell configured for the UE; or the base station determines, according to the received uplink data processing result sent by the small cell management entity, that the small cell corresponding to the small cell management entity is configured as a UE, and sends the small cell
  • the cell configuration signaling notifies the small cell management entity that the corresponding small cell has been configured for the UE.
  • the small cell management entity When the small cell management entity does not receive the small cell configuration signaling sent by the base station, the small cell management entity confirms that the corresponding small cell cannot be configured for the UE. In addition, after the small cell management entity receives the small cell configuration signaling, the small cell management entity may send the measurement signal. Further, after the small cell management entity receives the small cell configuration signaling, the small cell management entity may receive the small cell activation signaling sent by the base station to serve the UE.
  • the small cell management entity reports signaling of the channel shield estimation result of the uplink data of the UE, including one or more of the following: UE identifier, small cell identifier, evaluation result of the received data (including determining whether the correct demodulation, RSRP, channel) Measurement quality).
  • the UE identifier may be represented by one of the following: C-RNTI, resource location for receiving uplink data, UE ID, configuration information of uplink data, configuration information or index of uplink reference signal.
  • the small cell identifier may be represented by one of the following: a small cell index, a small cell physical cell ID, a small cell virtual cell ID, a small cell location information, and a small cell frequency point.
  • the small cell management entity calculates the channel quality or power of the received uplink data
  • the calculated channel quality or power may be calibrated using a compensation factor.
  • the compensation factor can be a fixed value, which can be obtained by simulation or empirical value.
  • the UE may establish an RRC connection with the macro cell controlled by the base station, and send uplink data through the uplink carrier of the macro cell; and may also receive signaling of configuring the small cell sent by the base station through the downlink carrier of the macro cell.
  • the uplink data may be the agreed uplink data sent by the UE after receiving the trigger signaling of the base station.
  • the UE may also receive a measurement signal sent by the small cell management entity of the small cell configured by itself, and feed back the measurement result to the base station.
  • the base station can determine the small cell activated for the UE according to the received measurement result.
  • the activation is for the small cell that has been configured for the UE.
  • the corresponding small cell provides the service data transmission service for the UE.
  • the small cell is configured to the UE, it does not represent the small cell to transmit service data for the UE, and the service data transmission is only provided after activation.
  • the UE may also receive signaling of the activated small cell management entity sent by the base station, and the activated small cell management entity can provide services for the UE.
  • this feature can be applied to embodiments of the present invention because the small cell of the new carrier type does not need to support UE camping.
  • the small cell refers to a small cell of a new carrier type.
  • the embodiments of the present invention are also applicable to a conventional small cell, because a conventional small cell can also do not support UE camping by the prior art.
  • the embodiment of the present invention is also applicable to a small cell that supports UE camping, but only has a certain impact on the capacity and mobility of the system.
  • the downlink carrier frequency of the base station is fl, and the uplink carrier frequency is f3; the uplink carrier frequency of the small cell management entity is f4, and the downlink carrier frequency is f2.
  • the macro cell under the control of the base station overlaps with the small cell under its control, when there is no UE in the connected state in the small cell When present, the small cell management entity of the small cell remains closed (this can save energy), in the small cell
  • the UE resides in a corresponding macro cell.
  • the base station determines that a small cell needs to be configured for the UE to transmit data
  • the base station triggers the subordinate small cell management entity to receive the uplink data sent by the UE in the uplink carrier frequency of the base station.
  • the base station needs to notify the small cell management entity of the information about the uplink data sent by the UE, so that the small cell management entity can accurately receive the UE to send the uplink carrier frequency of the base station.
  • Upstream data After receiving the uplink data sent by the UE, the sub-cell management entity of the base station may process the received uplink data, and send the processing result to the base station, where the base station may determine the small cell configured for the UE according to the processing result.
  • the base station may notify the corresponding small cell management entity of the small cell configured for the UE, and notify the UE.
  • the base station may also trigger a small cell management entity of the small cell configured for the UE to send a measurement signal on the downlink carrier frequency, and the UE performs measurement on the configured small cell, and the measurement result is performed on the base station, and the base station determines the UE as the UE according to the received measurement result. Activated small cell.
  • the base station When the base station triggers the subordinate d and the cell management entity receives the uplink data sent by the UE, the UE has already established an RRC connection with the macro cell controlled by the base station, and the carrier of the macro cell is communicating with the base station. In this case, the UE is also transmitting the uplink. data.
  • the base station may send a signaling to trigger the UE to send uplink data.
  • the small cell management entity When the base station triggers the subordinate small cell management entity to receive the uplink data, the small cell management entity remains in the closed state to save energy.
  • the small cell management entity may also be serving other UEs.
  • the small cell management entity After receiving the trigger signaling, the small cell management entity receives the uplink data sent by the UE.
  • the uplink data may be sent by a carrier corresponding to the macro cell, or may be sent by a carrier corresponding to the small cell.
  • the uplink data may be sent to the base station, or may be specifically sent to the small cell management entity.
  • the uplink data transmitted by the UE includes control signaling or uplink reference signal or user data transmitted through PUCCH or PUSCH.
  • the base station notifies the small cell management entity that the related information for receiving the uplink data of the UE is One or more of the following: resource information of uplink data, coding information used for uplink data, carrier frequency point information for uplink data transmission, uplink data type, and UE identifier.
  • This information can be used in combination, where the uplink data type refers to whether the UE sends a reference signal or user data.
  • the uplink data is user data
  • the base station needs to forward the uplink grant information sent by the UE to the subordinate small cell management entity, so that the small cell management entity learns the control information corresponding to the uplink data, and also needs to notify the uplink data frequency point and the UE. Identification and other information.
  • the uplink data is a reference signal
  • the reference signal may be sent in a pre-agreed manner, so that the small cell management entity can receive the uplink data in a predetermined manner.
  • the processing of the received uplink data by the small cell management entity may be classified into the following cases: In the first case, the small cell management entity forwards the received uplink data to the base station, and the base station solves the forwarded uplink data. Adjust or determine the channel shield. If the channel can be correctly demodulated or the channel quality meets the requirements, the small cell can be considered to be configured for the UE.
  • the algorithm for calculating the channel quality using the uplink data is agreed between the small cell management entity and the base station (for example, the method of calculating the channel shield indication (CQI) may be used, or the power of the received uplink data may be calculated),
  • the cell management entity evaluates the channel quality by using the uplink data of the received UE according to an agreed manner, and sends the evaluation result to the base station.
  • the base station configures the small cell for the UE according to the received evaluation result.
  • the small cell management entity demodulates the received uplink data, and determines whether the channel quality is correct by correct demodulation.
  • the channel is correctly demodulated, the channel quality meets the requirements, and the evaluation result is reported to the base station; if not correctly demodulated , it is considered that the channel shield cannot meet the requirements, and the evaluation result may not be reported to the base station. If the base station does not receive the evaluation result of the uplink data reported by the subordinate small cell management entity, it is considered that the small cell corresponding to the small cell management entity cannot be configured for the UE.
  • the base station obtains the evaluation result of the uplink data of the UE, and the base station may determine, according to the evaluation result or the other information (for example, the load information of the small cell), whether the small cell corresponding to the small cell management entity is suitable for the UE configuration. And will eventually configure the small for the UE
  • the information of the area informs the UE, and simultaneously informs the corresponding small cell management entity that the UE has been configured. If the small cell management entity reports the received UE uplink data to the base station, and the base station does not feed back to the small cell management entity whether the small cell signaling is configured for the UE, the small cell management entity considers that it is not configured for the UE. If the small cell management entity receives the signaling sent by the base station to configure the small cell for the UE, the small cell management entity may send the measurement signal.
  • the small cell management entity may send the measurement signal.
  • the UE After the UE learns that the base station is a small cell configured by itself, it can start receiving measurement signals sent by the small cell management entities of the small cells, perform measurement, and send the measurement result to the base station, and the base station according to the measurement result (or The small cell activated for the UE is determined according to the small cell load condition, and the small cell management entity of the small cell is notified to activate for the UE.
  • the signaling that the base station triggers the small cell management entity to receive the uplink data of the UE may be sent to the corresponding small cell management entity through the X2 port or the downlink carrier of the base station.
  • the small cell management entity reports signaling for channel quality evaluation of the uplink data of the UE, including one or more subordinates: carrying one or more UE identifiers (including C-RNTI, resource location for receiving uplink data, UE ID, uplink data) Configuration information); small cell identifier (if the small cell management entity and the base station use an air interface, the identifier includes a small cell index, a small cell ID, a small cell virtual ID, and location information), and the evaluation result of the received data (including whether the judgment is correct) Demodulation, RSRP, channel measurement quality).
  • UE identifiers including C-RNTI, resource location for receiving uplink data, UE ID, uplink data
  • Configuration information including C-RNTI, resource location for receiving uplink data, UE ID, uplink data
  • small cell identifier if the small cell management entity and the base station use an air interface, the identifier includes a small cell index, a small cell ID, a small cell virtual ID, and location information
  • Demodulation
  • the signaling that the base station notifies the small cell management entity for the configuration of the UE includes: the UE identifier, the small cell identifier (optional, if only one small cell management entity is notified, the parameter is not used, such as If the multiple small cell management entities are notified at the same time, this parameter is used.
  • the signaling that the base station notifies the UE to configure the small cell includes one or more of the following: a small cell identifier, a small cell frequency point, a small cell index (refer to an index used by a small cell set configured for the UE), and an index of the small cell of the base station (refers to the index of the small cell set controlled by the base station in the entire macro cell).
  • the small cell management entity calculates the channel quality or power of the received uplink data
  • the carrier frequency and small cell management used by the small cell management entity in the future The carrier frequency of the uplink data received by the UE is relatively different. Therefore, a compensation factor may be introduced to compensate for the profit and loss caused by the difference between the carrier frequency of the UE receiving the uplink data of the small cell management entity and the carrier frequency serving the UE in the future.
  • the value of the compensation factor may be a fixed value, which may be a face value measured in an actual deployment, or may be a reference value obtained by simulation. The reason why the compensation factor can be fixed is that the coverage of the small cell is relatively small, generally only a few tens of meters, so the carrier frequency difference? The range of the channel shield or power from I is limited.
  • the base station triggers the small cell management entity to transmit the measurement signal by using the downlink frequency of the base station.
  • the UE working in the macro cell discovers the nearby small cell by the same frequency measurement, and reports the discovered small cell to the base station.
  • the base station selects a suitable small cell from the small cell reported by the UE to configure the UE, and triggers the small cell management entity of the small cell configured to send the measurement signal in the downlink frequency of the small cell, and the small cell management entity is no longer in the
  • the base station downlink frequency transmits a measurement signal.
  • the base station informs the UE of the configured small cell, and the UE receives the measurement signal sent by the small cell management entity on the downlink frequency of the small cell, and reports the measurement result to the base station, and the base station selects a suitable small cell for the UE to activate according to the measurement result.
  • the macro cell and its subordinate small cells are as shown in FIG. 1.
  • 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 the small cell is deployed in the hot spot area to provide better data representation for the user.
  • the macro cell needs to remain open at all times. If the small cell subordinate to the macro cell does not provide services for the UE, the small cell management entity that keeps the small cell is turned off (ie, the air interface does not send and receive information).
  • the base station For a UE operating in a macro cell and performing uplink and downlink data transmission with the macro cell, when When the base station determines (for example, according to the scheduling requirement), when the small cell is configured for the UE, the base station triggers the subordinate small cell management entity to receive the uplink data of the UE, and notifies the small cell management entity to receive relevant information necessary for the uplink data of the UE (for example, uplink). Control information of the data, and carrier frequency, UE identification information). After receiving the uplink data of the UE, the small cell management entity demodulates the uplink data, and if correctly demodulated, the small cell management entity notifies the base station of the result.
  • the base station determines (for example, according to the scheduling requirement)
  • the base station triggers the subordinate small cell management entity to receive the uplink data of the UE, and notifies the small cell management entity to receive relevant information necessary for the uplink data of the UE (for example, uplink). Control information of the data, and carrier frequency, UE identification information
  • the base station selects a small cell corresponding to the appropriate small cell management entity from the reported small cell management entity that is correctly demodulated, and configures the small cell as the UE. In this case, multiple small cells can be selected.
  • the base station notifies the small cell management entity of the selected small cell, and the small cell management entity sends the measurement signal, and notifies the UE of the small cell configured for the UE.
  • the UE starts to measure the small cell configured for itself, and reports the measurement result to the base station.
  • the base station determines the small cell activated for the UE according to the received measurement result (which may also consider the small cell load condition), and notifies the UE of the small cell to be activated.
  • the macro cell and its subordinate small cells are shown in FIG. 1.
  • the embodiment of the present invention is also applicable to the case where the carrier type of the small cell is deployed as a compatible carrier type.
  • the small cell management entity of the small cell can prevent the UE from accessing the small cell in an idle state by blocking the UE access.
  • the small cell management entity can broadcast information in the system.
  • the blocking of UE access is implemented by the cellBarred parameter.
  • the specific implementation manner is to first determine that the UE with no connection status in the small cell of the compatible carrier can perform the UE access blocking on the small cell that is compatible with the carrier.
  • the macro cell needs to remain always on, and the small cell management entity subordinate to the macro cell remains closed (ie, the air interface does not send and receive information).
  • the base station For a UE operating in a macro cell and performing uplink and downlink data transmission with the macro cell, when the base station determines (eg, the base station determines according to scheduling requirements), the base station triggers the UE to send an uplink reference signal, and triggers the subordinate.
  • the small cell management entity receives the uplink reference signal of the UE.
  • the reference signal may be pre-agreed, for example, using existing channel detection of LTE. Reference signal (SRS).
  • SRS Reference signal
  • the base station needs to notify the small cell management entity of relevant information necessary for receiving the uplink reference signal of the UE, for example, the carrier frequency of the uplink reference signal, and the UE identification information. After receiving the uplink reference signal of the UE, the small cell management entity uses the uplink reference signal to perform uplink channel quality evaluation.
  • the small cell management entity notifies the base station of the evaluation result.
  • the base station selects a suitable small cell from the small cell that can meet the channel quality requirement to configure the UE, and multiple small cells can be selected at this time.
  • the base station notifies the small cell management entity of the selected small cell, and the small cell management entity sends a measurement signal, and the base station simultaneously notifies the UE of the small cell configured for the UE.
  • the UE starts to measure the small cell configured to itself, and reports the measurement result to the base station; the base station determines the small cell activated by the UE according to the received measurement result and the small cell load condition (if any), and notifies the activated small cell.
  • UE starts to measure the small cell configured to itself, and reports the measurement result to the base station; the base station determines the small cell activated by the UE according to the received measurement result and the small cell load condition (if any), and notifies the activated small cell.
  • the small cell management entity of the small cell needs to remain turned on; and, since it is necessary to provide necessary services for the camped UE, the small cell management entity providing the resident small cell needs to maintain the measurement signal. Transmitted to help the UE make the necessary measurements for cell reselection.
  • the base station For a connected UE operating in a macro cell and performing uplink and downlink data transmission with the macro cell, when the base station determines (eg, the base station determines according to scheduling requirements), the base station triggers the UE to send an uplink reference signal, and The subordinate small cell management entity is triggered to receive the uplink reference signal of the UE.
  • the reference signal may be pre-agreed, for example using an existing SRS of LTE.
  • the base station needs to notify the small cell management entity of the relevant information necessary for receiving the uplink reference signal of the UE, such as the carrier frequency of the uplink reference signal and the UE identification information. After receiving the uplink reference signal of the UE, the small cell management entity uses the uplink reference signal to perform uplink channel quality evaluation.
  • the small cell management entity notifies the base station of the evaluation result.
  • the base station selects a small cell corresponding to the appropriate small cell management entity from the small cell management entity that can meet the channel quality requirement, and configures the small cell as the UE. In this case, multiple small cells can be selected.
  • the base station notifies the selected small cell
  • the management entity notifies the UE to the small cell configured for the UE.
  • the UE starts to measure the small cell configured for itself, and reports the measurement result to the base station.
  • the base station determines the small cell activated by the UE according to the received measurement result and the small cell load condition (if any), and notifies the activated small cell. Give the UE.
  • the macro cell and its subordinate small cells are as shown in FIG. 1.
  • At least one of the carriers of the macro cell adopts 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 a hotspot area to provide high data representation for the user.
  • the macro cell needs to remain open at all times. If the small cell management entity of the small cell subordinate to the macro cell does not provide services for the UE, it remains closed (ie, the air interface does not send and receive information).
  • the base station For a UE operating in a macro cell and performing uplink and downlink data transmission with the macro cell, when the base station decides (for example, the base station determines a small cell according to the scheduling requirement (for example, the load of the macro cell is too large), the base station triggers.
  • the subordinate small cell management entity sends the measurement signal in the fl carrier frequency, so that the UE can find the nearby small cell when performing the same frequency measurement (the same frequency measurement is performed by the UE, so no triggering).
  • the UE notifies the base station of the result of the intra-frequency measurement, and the base station determines that the appropriate small cell is configured for the UE according to the received result of the intra-frequency measurement, and also triggers the small-cell management entity of the small cell configured for the UE to send in its own downlink frequency. Measurement signal.
  • the base station also notifies the UE of the small cell configured for the UE, and the UE performs measurement on the small cell configured for itself, and reports the measurement result to the base station, and the base station selects a suitable small cell to activate the UE. This can prevent the UE from performing inter-frequency measurement in order to discover nearby small cells, thereby effectively saving power.
  • the process shown in FIG. 4 may be performed, and the process includes the following steps:
  • Step 410 The base station triggers the subordinate small cell management entity to receive uplink data, for example, the base station triggers The subordinate small cell management entity receives the uplink data sent by the UE.
  • Step 420 The base station learns the quality of the uplink data reported by the small cell management entity, and determines the small cell to be configured according to the quality, for example, the base station receives the quality of the uplink data reported by the small cell management entity, and then according to the The quality is determined to be a small cell configured by the UE.
  • the method for implementing the small cell serving the UE in the embodiment of the present invention can solve the problem of small cell discovery in the macro cell, so as to configure the small cell for the UE, and the network side and The UE has significant energy saving effects.

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

Abstract

La présente invention concerne un procédé, un dispositif et un système permettant de fournir à un UE un service par petite cellule. Une station de base (BS) déclenche l'entité de gestion d'une petite cellule secondaire pour recevoir des données sortantes. Ladite station de base acquiert la qualité des données sortantes qui lui est remise par l'entité de gestion de la petite cellule, puis elle détermine, conformément à cette qualité, la petite cellule à configurer. La technique qui fait l'objet de la présente invention et qui permet de fournir à l'UE un service par petite cellule résout le problème de la découverte d'une petite cellule dans une macrocellule, de sorte qu'une petite cellule peut être configurée pour un UE et que le côté réseau ainsi que l'UE deviennent plus économes en énergie.
PCT/CN2013/081506 2012-09-29 2013-08-15 Procédé, dispositif et système permettant de fournir à un ue un service par petite cellule WO2014048182A1 (fr)

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CN105208543A (zh) * 2014-06-09 2015-12-30 中国移动通信集团公司 一种小小区发现方法及系统、基站、用户设备
CN105307243A (zh) * 2014-07-22 2016-02-03 中兴通讯股份有限公司 无线接入网及其服务小小区的选择方法和装置
EP3361772B1 (fr) * 2015-11-16 2022-01-05 Huawei Technologies Co., Ltd. Procédé d'envoi de rapport de mesure de cellule et équipement utilisateur
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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