CN103716858B - It is a kind of to realize that cell is the methods, devices and systems of UE service - Google Patents
It is a kind of to realize that cell is the methods, devices and systems of UE service Download PDFInfo
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- CN103716858B CN103716858B CN201210375551.7A CN201210375551A CN103716858B CN 103716858 B CN103716858 B CN 103716858B CN 201210375551 A CN201210375551 A CN 201210375551A CN 103716858 B CN103716858 B CN 103716858B
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- 238000011156 evaluation Methods 0.000 claims description 37
- 238000012545 processing Methods 0.000 claims description 22
- 238000013441 quality evaluation Methods 0.000 claims description 17
- 230000020411 cell activation Effects 0.000 claims description 12
- 238000001303 quality assessment method Methods 0.000 claims description 9
- 230000001960 triggered effect Effects 0.000 claims description 9
- 238000004088 simulation Methods 0.000 claims description 6
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- 239000000969 carrier Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
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- 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
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- 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
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- 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
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- 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
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Abstract
It realizes that cell is the methods, devices and systems of UE service the invention discloses a kind of, upstream data is received by base station triggers subordinate's cell management entity；The quality for the upstream data that cell management entity reports is known in base station, further according to the quality determination small cell to be configured.Realize that cell is the technology of UE service in the present invention, the cell being able to solve under macrocell is found the problem, and to configure cell for UE, and network side and UE have apparent energy-saving effect.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method, an apparatus, and a system for implementing a small cell to serve User Equipment (UE).
Background
In the Long Term Evolution (LTE) at the present stage, to better solve the UE communication in the local hot spot area and improve the spectrum efficiency, a small cell (small cell) is introduced. The small cell is characterized by small coverage (radius is dozens of meters), low transmission power and high deployment density. The small cell is compared with a macro cell (macro cell), which generally has a large coverage area (over 500 meters in radius) and high transmission power, and the macro cell may use the same or different frequency as the small cell. For the case of using different frequencies, a macro cell generally uses a lower frequency band, and better provides coverage of a larger range; the small cell generally uses a higher frequency band to provide a high-speed data service. Fig. 1 is a schematic diagram of a typical macro cell and small cells, where there are many small cells under macro cell coverage and different frequency bands are used, the macro cell uses frequency point f1, and the small cell uses frequency point f 2. The management of the small cell can be realized by a base station controller, or by other independent entities, and the base station and the entity for managing the small cell can interact with each other.
Since the coverage area of the small cell is small, the number of the small cells is large, and most of the small cells use different frequency points from the macro cell, in a system configured with the small cell, the UE needs to frequently perform inter-frequency measurement, which may have the following adverse effects on the UE:
the power consumption of the UE side is increased;
2. potentially affecting the data transmission terminals of the macro cell. Mainly because most UEs need to interrupt the data transmission of the original frequency during the inter-frequency measurement.
In the research in the present stage, on the basis of the multi-carrier aggregation technology, the LTE R11 stage puts new demands on the aspects of spectrum resource utilization, network energy saving, and inter-cell interference suppression. To achieve this, a new carrier type is proposed. The new carrier has a distinct feature that backward compatibility is not required to be considered in the design. In this way, the carriers in the small cells are all configured as new carrier types, which may effectively help the management entity of the small cell to save power in some cases, for example, when the management entity of the small cell does not serve a UE, the management entity of the small cell may be turned off, which may help the network side to save power.
Disclosure of Invention
In view of the above, the present invention provides a method, an apparatus, and a system for serving a UE by a small cell, so as to solve the problem of small cell discovery in a macro cell.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for enabling a small cell to serve User Equipment (UE), the method comprising:
the base station triggers a subordinate small cell management entity to receive uplink data;
and the base station acquires the quality of the uplink data reported by the small cell management entity and then determines the small cell to be configured according to the quality.
The method further comprises the following steps:
and the base station informs the UE and/or a 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: UE identity, small cell identity;
the signaling when the base station notifies the UE comprises one or more of the following: the method comprises the following steps of identifying a small cell, frequency points of the small cell, indexes of the small cell and indexes of subordinate small cells of a base station;
the small cell information includes one or more of: small cell identification, small cell frequency points and small cell indexes;
the UE identity is represented by one of the following: C-RNTI cell RNTI, receiving the resource position of uplink data, UEID, the configuration information of the uplink data and the configuration information or index of an uplink reference signal;
the small cell identity is represented by one of: the small cell location information comprises small cell indexes, small cell physical cell IDs, small cell virtual cell IDs, small cell location information and small cell frequency points.
When a base station triggers a subordinate small cell management entity to receive uplink data, the base station informs the small cell management entity of receiving relevant information of the uplink data sent by UE;
the information related to the uplink data comprises one or more of the following: resource information, coding information, carrier frequency point information, uplink data type and UE identification of uplink data.
The base station acquires the quality of the uplink data reported by the small cell management entity, and the quality evaluation of the channel of the uplink data comprises the following steps:
the small cell management entity evaluates the channel quality of the received UE uplink data according to an appointed mode and reports an evaluation result to the base station; or,
and the base station receives the UE uplink data forwarded by the small cell management entity and evaluates the received uplink data.
The method for the small cell management entity to evaluate the channel quality comprises the following steps:
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 reception power of the received uplink data.
For small cell management entities which do not report channel quality, the base station considers that the small cells corresponding to the small cell management entities are not suitably configured for the UE.
The method further comprises the following steps:
for a small cell suitable for being configured for a UE, a base station sends a small cell configuration signaling to a small cell management entity of the small cell, and notifies the small cell management entity that a corresponding small cell has been configured for the UE.
The method further comprises the following steps:
the small cell management entity receiving the small cell configuration signaling sends a measurement signal; and/or the presence of a gas in the gas,
the base station transmits small cell activation signalling to the small cell management entity.
The method for triggering the subordinate small cell management entity by the base station comprises the following steps:
the base station sends a trigger signaling to the small cell management entity through an X2 port or a downlink carrier of the base station.
Before triggering, the UE capable of performing data interaction with the base station establishes 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 remains on 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 a macro cell controlled by the base station; the uplink data includes: control signaling or uplink reference signals or user data transmitted through a physical uplink control channel PUCCH or a physical uplink shared channel PUSCH.
A method of enabling a small cell to serve a UE, the method comprising:
the small cell management entity receives information for triggering the small cell management entity to receive uplink data, receives the uplink data according to the information, processes the received uplink data and sends a processing result;
the small cell management entity receives the small cell configuration signaling and knows whether the small cell corresponding to the small cell management entity is allocated.
After the small cell management entity receives the uplink data,
the small cell management entity forwards the received uplink data to a base station, and the base station evaluates the channel quality of the uplink data and determines whether a small cell corresponding to the small cell management entity can be configured for the UE; or,
and the small cell management entity performs channel quality evaluation on the received uplink data according to an appointed mode and sends an evaluation result to the base station.
When channel quality evaluation is performed in an agreed manner, 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.
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 is not configurable for the UE.
The method further comprises the following steps:
when the channel quality evaluation result meets the requirement, the base station sends a small cell configuration signaling to the small cell management entity to inform the small cell management entity that the corresponding small cell is configured for the UE; or, the base station determines, according to the received uplink data processing result sent by the small cell management entity, to configure the small cell corresponding to the small cell management entity for the UE, and sends a small cell configuration signaling to notify the small cell management entity that the small cell management entity has configured a corresponding small cell for the UE.
After receiving the small cell configuration signaling, the small cell management entity also sends a measurement signal; and/or the small cell management entity receives small cell activation signaling sent by the base station to serve the UE.
The method further comprises the following steps:
when the small cell management entity calculates the channel quality or power of the received uplink data, the small cell management entity adopts a compensation factor to calibrate the calculated channel quality or power;
the compensation factor is a fixed value and is obtained through simulation or experience values.
A method of enabling a small cell to serve a UE, the method comprising:
the UE establishes RRC connection with a macro cell controlled by a base station and transmits uplink data through an uplink carrier of the macro cell;
and the UE receives a signaling for configuring the small cell, which is sent by the base station through the downlink carrier of the macro cell.
The method further comprises the following steps:
the UE receives a measurement signal transmitted by a small cell management entity of a small cell configured for the UE, and feeds back a measurement result to the base station.
The method further comprises the following steps:
the UE receives signaling sent by the base station to activate the small cell management entity.
The uplink data is appointed uplink data sent by the UE after receiving the trigger signaling of the base station.
A device for realizing small cell serving UE, the device is used for triggering subordinate small cell management entity to receive uplink data; and acquiring the quality of the uplink data reported by the small cell management entity, and determining the small cell to be configured according to the quality.
The apparatus is also configured to:
and notifying the UE and/or a corresponding small cell management entity of the small cell information of the small cell.
The signaling when the device notifies the small cell management entity comprises: UE identity, small cell identity;
the signaling when the apparatus notifies the UE includes one or more of: the method comprises the following steps of identifying a small cell, frequency points of the small cell, indexes of the small cell and indexes of subordinate small cells of a base station;
the small cell information includes one or more of: small cell identification, small cell frequency points and small cell indexes;
the UE identity is represented by one of the following: C-RNTI, receiving the resource position of the uplink data, UEID, the configuration information of the uplink data and the configuration information or index of the uplink reference signal;
the small cell identity is represented by one of: the small cell location information comprises small cell indexes, small cell physical cell IDs, small cell virtual cell IDs, small cell location information and small cell frequency points.
When the device triggers a subordinate small cell management entity to receive uplink data, the device is used for informing the small cell management entity of receiving relevant information of uplink data sent by UE;
the information related to the uplink data comprises one or more of the following: resource information, coding information, carrier frequency point information, uplink data type and UE identification of uplink data.
When the device learns the quality of the uplink data reported by the small cell management entity, the device is used for evaluating the channel quality of the uplink data:
triggering a small cell management entity to evaluate the channel quality of the received UE uplink data according to an appointed mode, and reporting an 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, is configured to:
the channel quality is determined by judging whether the received uplink data can be correctly demodulated or by calculating the reception power of the received uplink data.
For small cell management entities which do not report channel quality, the apparatus is configured to consider that small cells corresponding to the small cell management entities are not suitable for configuring the UE.
The apparatus is further configured to:
for a small cell which is suitable for being configured for the UE, sending small cell configuration signaling to a small cell management entity of the small cell to inform the small cell management entity that the corresponding small cell has been configured for the UE.
The apparatus is further configured to:
triggering the small cell management entity receiving the small cell configuration signaling to send a measurement signal; and/or the presence of a gas in the gas,
transmitting small cell activation signaling to the small cell management entity.
When the apparatus triggers a subordinate small cell management entity, the apparatus is configured to:
and sending a trigger signaling to a small cell management entity through an X2 port or a downlink carrier of the device.
Before the triggering, the UE capable of performing data interaction with the device establishes RRC connection with a base station;
the small cell management entity capable of receiving uplink data is turned off or kept on for other UEs until triggered by the apparatus;
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 a macro cell controlled by the base station; the uplink data includes: control signaling or uplink reference signals or user data transmitted through the PUCCH or PUSCH.
The apparatus is a base station.
An apparatus for enabling a small cell to serve a UE, the apparatus configured to:
receiving information for triggering the device to receive uplink data, receiving the uplink data according to the information, processing the received uplink data, and sending a processing result; and the number of the first and second groups,
and receiving the small cell configuration signaling, and knowing whether the small cell corresponding to the device is allocated.
After receiving the uplink data, the apparatus is configured to:
forwarding the received uplink data to a base station, triggering the base station to perform channel quality evaluation on the uplink data, and determining whether a small cell corresponding to the small cell management entity can be configured for the UE; or,
and performing channel quality evaluation on the received uplink data according to an appointed mode, and sending an evaluation result to the base station.
When channel quality assessment is performed in an agreed manner, the apparatus is configured to determine channel quality by judging whether received uplink data can be correctly demodulated, or determine channel quality by calculating reception power of the received uplink data.
When the base station does not receive the evaluation result sent by the device, the base station is used for considering that the small cell corresponding to the device cannot be configured for the UE.
The base station is configured to:
when the channel quality evaluation result meets the requirement, sending a small cell configuration signaling to the device, and informing the device that a corresponding small cell is configured for the UE; or, according to the received uplink data processing result sent by the apparatus, determining to configure the small cell corresponding to the apparatus for the UE, and sending a small cell configuration signaling to notify the apparatus that a corresponding small cell has been configured for the UE.
After the device receives the small cell configuration signaling, the device is further configured to send a measurement signal; and/or receiving small cell activation signaling transmitted by a base station to serve the UE.
The device is used for calibrating the calculated channel quality or power by adopting 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 through simulation or experience values.
The apparatus is a small cell management entity.
An apparatus for enabling a small cell to serve a UE, the apparatus configured to:
establishing RRC connection with a macro cell controlled by a base station, and sending uplink data through an uplink carrier of the macro cell; and the number of the first and second groups,
and receiving a signaling for configuring the small cell, which is transmitted by the base station through the downlink carrier of the macro cell.
The apparatus is also configured to:
and receiving a measurement signal transmitted by a small cell management entity of the self-configured small cell, and feeding back a measurement result to the base station.
The apparatus is also configured to:
and receiving signaling which is transmitted by the base station and activates the small cell management entity.
The uplink data is agreed uplink data sent by the device after receiving the trigger signaling of the base station.
The apparatus is a UE.
A method of enabling a small cell to serve a UE, the method comprising:
the base station triggers a subordinate small cell management entity to transmit a measurement signal by adopting the downlink frequency of the base station;
the base station receives the measurement results for the small cell, from which the small cell to be configured is determined.
The method for determining the small cell to be configured comprises the following steps: and the base station selects a proper small cell from the small cells reported by the UE to configure the UE.
The method further comprises the following steps:
the base station triggers a small cell management entity of a small cell configured to the UE to send a measurement signal in the downlink frequency of the small cell; the base station informs the UE of the small cell for which it is configured.
The method further comprises the following steps:
and the UE receives the measurement signal sent by the small cell management entity at the downlink frequency of the small cell and reports the measurement result to the base station, and the base station selects a proper small cell for the UE to activate according to the measurement result.
A system for enabling a small cell to serve a UE, the system comprising a base station, a small cell management entity; wherein,
the base station is used for triggering a subordinate small cell management entity to receive uplink data sent by the UE; acquiring the quality of the uplink data reported by the small cell management entity, and determining the small cell configured for the UE according to the quality;
the small cell management entity is used for receiving information which is sent by the base station and used for triggering the small cell management entity to receive UE uplink data, receiving the UE uplink data according to the information, processing the received uplink data and sending a processing result to the base station; and receiving a small cell configuration signaling sent by a base station, and acquiring whether a small cell corresponding to the small cell management entity is configured by the UE.
The small cell management entity receiving the small cell configuration signaling is further configured to send a measurement signal; and/or the presence of a gas in the gas,
the base station is further configured to send small cell activation signaling to the small cell management entity.
The system also comprises UE, which is used for establishing RRC connection with the macro cell controlled by the base station and sending uplink data through the uplink carrier wave of the macro cell; and receiving signaling for configuring the small cell, which is transmitted by the base station through the downlink carrier of the macro cell.
The invention realizes the technology that the small cell serves the UE, can solve the problem of finding the small cell under the macro cell so as to configure the small cell for the UE, and has obvious energy-saving effect on the network side and the UE.
Drawings
Fig. 1 is a schematic diagram of the communication principle between a macro cell and a small cell;
figure 2 is a flow chart of a small cell serving a UE in an embodiment of the present invention;
figure 3 is a flow chart of a small cell serving a UE in another embodiment of the present invention;
fig. 4 is a simplified flowchart of a small cell serving a UE according to an embodiment of the present invention.
Detailed Description
In practical applications, entities for managing the small cell may be various, such as an independent management entity, a device controlled by a base station, and the like. The device controlled by the base station may be a Remote Radio Head (RRH), a smart antenna of the base station, or the like. Regardless of the implementation, entities that manage small cells may be collectively referred to as small cell management entities. The base station triggered small cell management entity reception described below corresponds to base station triggered small cell reception.
On the base station side, the base station may trigger the subordinate small cell management entity to receive the uplink data sent by the UE, receive the quality of the uplink data reported by the small cell management entity, determine the small cell configured for the UE according to the quality, and may also notify the UE and the corresponding small cell management entity of the small cell information of the small cell configured for the UE.
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.
The small cell management entity can receive uplink data transmitted by the UE, and the small cell management entity is normally turned off or kept on for other UEs before being triggered by the base station.
The uplink data sent by the UE is uplink data sent by the UE to the base station, or uplink data sent by the UE through an uplink carrier of a macro cell controlled by the base station. The uplink data may include: control signaling or uplink reference signals or user data transmitted over a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH). The uplink data may also be pre-agreed data.
When a base station triggers a subordinate small cell management entity to receive uplink data sent by a UE, the base station may notify the small cell management entity of relevant information for receiving the uplink data sent by the UE, so that the small cell management entity can accurately receive and analyze the uplink data sent by the UE. The information related to the uplink data comprises one or more of the following: resource information, coding information, carrier frequency point information, uplink data type, and UE identifier (indicating an identifier of a UE corresponding to data received by the small cell management entity) of the uplink data.
In order to ensure that the base station can receive the quality of the uplink data reported by the small cell management entity, the small cell management entity may perform channel quality evaluation on the received UE uplink data according to an agreed manner, and report an evaluation result to the base station. If the channel quality does not meet the requirement, the small cell management entity may not report the evaluation result to the base station.
There are various methods for estimating channel quality, such as: 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 reception power of the received uplink data.
In order to enable the base station to determine the small cell configured for the UE, when receiving UE uplink data forwarded by a subordinate small cell management entity, the base station may evaluate the uplink data, and determine the small cell configured for the UE according to an evaluation result; or, the base station may determine the small cell configured for the UE 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 inform the small cell management entity that the UE has been configured with the corresponding small cell. For small cell management entities that do not report channel quality, the base station may consider that the small cells corresponding to these small cell management entities are not suitably configured for the UE.
When the small cell management entity does not receive signaling (such as small cell configuration signaling) sent by the base station and configured for the UE, the small cell management entity confirms that the small cell corresponding to the small cell management entity cannot be configured for the UE. In addition, after the small cell management entity determines that the small cell corresponding to the small cell management entity can be configured for the UE, the small cell management entity may send a measurement signal. Furthermore, after the small cell management entity determines that the small cell corresponding to the small cell management entity can be configured for the UE, the base station may transmit a small cell activation signaling to the small cell management entity.
In order to enable the base station to trigger the subordinate small cell management entity, the base station may send a trigger signaling to the small cell management entity through the X2 port or a downlink carrier of the base station.
The signaling that the base station informs the small cell management entity to configure for the UE includes: UE identity, small cell identity (optional).
The signaling when the base station notifies the UE of the small cell information of the small cell configured for the UE includes one or more of the following: small cell identification, small cell frequency points, small cell index (which refers to an index adopted by a small cell set configured to the UE), and index of a small cell subordinate to the base station (which refers to an index of a small cell set controlled by the base station within the whole macro cell).
Wherein, the UE identity may be represented by one of the following: cell RNTI (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 identity may be represented by one of: the small cell location information comprises small cell indexes, small cell physical cell IDs, small cell virtual cell IDs, small cell location information and small cell frequency points.
On the small cell management entity side, the small cell management entity may receive information sent by the base station to trigger the small cell management entity to receive the UE uplink data, receive the UE uplink data according to the information, process the received uplink data, and send a processing result to the base station. Then, the small cell management entity may further receive a small cell configuration signaling sent by the base station, so as to know whether the small cell corresponding to the small cell management entity is configured by the UE.
The initial state of the small cell management entity is typically set to off before being triggered by the base station; or the state of the small cell management entity is on and serves other UEs.
The uplink data is sent by the UE to the base station, or is sent by the UE at an uplink carrier frequency of a macro cell controlled by the base station. The uplink data may also be agreed uplink data sent by the UE after receiving the base station trigger signaling.
The information for receiving uplink data of the UE includes one or more of: resource information, coding information, carrier frequency point information, uplink data type and UE identification of uplink data. The uplink data specifically includes control signaling or uplink reference signal or user data sent through PUCCH or PUSCH.
In order to ensure that the received uplink data can be processed, the small cell management entity may forward the received uplink data to the base station, and the base station performs channel quality evaluation on the uplink data, so as to determine 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 appointed mode, and sends an assessment result to the base station.
When channel quality assessment is performed in an agreed manner, the small cell management entity may determine 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.
And when the channel quality evaluation result of the small cell management entity on the received uplink data is not satisfactory, the evaluation result is not sent to 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 is not configurable for the UE.
The base station may receive UE uplink data forwarded by the small cell management entity and perform channel quality estimation on the uplink data, and when a result of the channel quality estimation satisfies a requirement, the base station may send a small cell configuration signaling to the small cell management entity to notify the small cell management entity that a corresponding small cell is configured for the UE; or, the base station determines, according to the received uplink data processing result sent by the small cell management entity, to configure the small cell corresponding to the small cell management entity for the UE, and sends a small cell configuration signaling to notify the small cell management entity that the small cell management entity has configured a corresponding small cell for the UE.
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 a measurement signal. Furthermore, when 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 signaling of the channel quality assessment result of the uplink data of the UE reported by the small cell management entity includes one or more of the following: UE identity, small cell identity, evaluation of received data (including determining whether to demodulate correctly, RSRP, channel measurement quality).
Wherein, the UE identity may be represented by one of the following: and the C-RNTI is used for receiving the resource position of the uplink data, the UEID, the configuration information of the uplink data and the configuration information or the index of the uplink reference signal.
The small cell identity may be represented by one of: the small cell location information comprises small cell indexes, small cell physical cell IDs, small cell virtual cell IDs, small cell location information and small cell frequency points.
When the small cell management entity calculates the channel quality or power of the received uplink data, the small cell management entity may calibrate the calculated channel quality or power with a compensation factor. Wherein the compensation factor may be a fixed value, which may be obtained by simulation or empirical values.
On the UE side, the UE may establish an RRC connection with a macro cell controlled by the base station, and send uplink data through an uplink carrier of the macro cell; and receiving signaling for configuring the small cell, which is transmitted by the base station through the downlink carrier of the macro cell.
The uplink data may be agreed uplink data sent by the UE after receiving the trigger signaling of the base station.
The UE may also receive a measurement signal transmitted by a small cell management entity of a small cell configured for itself, and feed back a 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 a small cell already configured to the UE, and when the UE receives an activation command of the corresponding small cell, the corresponding small cell provides a service for transmitting traffic data to the UE. After the small cell is configured to the UE, the small cell does not transmit the service data for the UE on behalf of the small cell, and only after activation, the small cell provides service data transmission.
The UE may also receive signaling sent by the base station to activate a small cell management entity, which can provide services for the UE.
In particular, after the introduction of small cells (in particular, small cells of a new carrier type), this feature can be applied to the present invention because small cells of a new carrier type do not need to support UE camping. When not specifically described below, the small cell refers to a small cell of a new carrier type. Of course, the present invention is also applicable to conventional small cells, since conventional small cells can also do not support UE camping by the prior art. In addition, the invention is also suitable for supporting the small cell where the UE resides, and only has certain influence on the capacity and the mobility of the system.
Referring to fig. 1 and 2, the downlink carrier frequency of the base station is f1, and the uplink carrier frequency is f 3; the uplink carrier frequency of the small cell management entity is f4, and the downlink carrier frequency is f 2. When the macro cell under the control of the base station overlaps with the small cell under the control of the base station, when no connected UE exists in the small cell, the small cell management entity of the small cell remains off (so that energy can be saved), and the UE in the small cell resides in the corresponding macro cell. When the base station determines that the small cell needs to be configured for the UE to transmit data, the base station triggers a subordinate small cell management entity to receive uplink data sent by the UE in an uplink carrier frequency of the base station. In order for the small cell management entity to receive the uplink data of the UE, the base station needs to notify the small cell management entity of information related to uplink data transmitted by the UE, so that the small cell management entity can accurately receive the uplink data transmitted by the UE in the uplink carrier frequency of the base station. After receiving the uplink data sent by the UE, the base station subordinate small cell management entity may process the received uplink data and send a processing result to the base station, and the base station may determine, according to the processing result, the small cell configured for the UE.
In addition, 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 a small cell configured for the UE to send a measurement signal at a downlink carrier frequency, the UE performs measurement on the configured small cell, reports a measurement result to the base station, and the base station determines the small cell activated by the UE according to the received measurement result.
When the base station triggers the subordinate small cell management entity to receive uplink data transmitted by the UE, the UE generally already establishes an RRC connection with a macro cell controlled by the base station and is communicating with the base station through a carrier of the macro cell, in which case the UE is also transmitting the uplink data. For a UE that does not establish an RRC connection with the base station, the base station may send signaling to trigger the UE to send uplink data.
When the base station triggers the subordinate small cell management entity to receive the uplink data sent by the UE, the small cell management entity keeps a closed state so as to save energy. Of course, the small cell management entity may also be serving other UEs, and at this time, after receiving the trigger signaling, the small cell management entity receives the uplink data sent by the UE. The uplink data may be transmitted on a carrier corresponding to a macro cell or may be transmitted on a carrier corresponding to a small cell. The uplink data may be transmitted to the base station, or may be transmitted to the small cell management entity exclusively. 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 informs the small cell management entity that the relevant information for receiving the UE uplink data is one or more of the following: the method comprises the following steps of resource information of uplink data, coding information adopted by the uplink data, carrier frequency point information sent by the uplink data, uplink data type and UE identification. These information may be used in combination, where the uplink data type refers to whether the UE transmits a reference signal or user data. When the uplink data is user data, the base station needs to forward the uplink authorization information sent for the UE to a subordinate small cell management entity, so that the small cell management entity knows the control information corresponding to the uplink data, and needs to notify information such as an uplink data frequency point and a UE identifier. When the uplink data is the reference signal, the reference signal may be sent in a predetermined manner, so that the small cell management entity can receive the uplink data in the predetermined manner.
The processing of the received uplink data transmitted by the UE by the small cell management entity can be divided 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 demodulates the forwarded uplink data or determines the channel quality, and if the uplink data can be correctly demodulated or the channel quality meets the requirement, the small cell is considered to be configured for the UE. In the second case, an algorithm for calculating channel quality using uplink data is agreed between the small cell management entity and the base station (for example, a method for calculating a Channel Quality Indicator (CQI) may be adopted, or power of received uplink data is calculated), the small cell management entity evaluates the channel quality using the received uplink data of the UE in an agreed manner, and sends the evaluation result to the base station. And the base station configures the small cell for the UE according to the received evaluation result. In the third situation, the small cell management entity demodulates the received uplink data, judges the channel quality by judging whether the demodulation can be correctly carried out or not, and if the demodulation can be correctly carried out, the channel quality meets the requirement and reports the evaluation result to the base station; if the demodulation cannot be correctly carried out, the channel quality is considered to be not capable of meeting the requirement, and the evaluation result can 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.
After the above processing, the base station obtains an evaluation result of the uplink data of the UE, and the base station may determine whether the small cell corresponding to the small cell management entity is suitable for configuring the UE according to the evaluation result or by combining with other information (for example, load information of the small cell), and finally notify the UE of information of the small cell configured for the UE, and notify the corresponding small cell management entity that the UE has been configured. If the small cell management entity reports the received uplink data of the UE to the base station, and the base station does not feed back a signaling whether to configure the small cell for the UE to the small cell management entity, the small cell management entity considers that the small cell management entity does not configure the UE for the UE. The small cell management entity may send a measurement signal if it receives signaling sent by the base station to configure the small cell for the UE.
After knowing that the base station is a small cell configured by the UE, the UE can start receiving measurement signals sent by the small cell management entities of the small cells to perform measurement, and report the measurement result to the base station, and the base station determines the small cell activated by the UE according to the measurement result (or by combining with the load condition of the small cell), and notifies the small cell management entity of the small cell to activate the UE.
The signaling that the base station triggers the small cell management entity to receive the UE uplink data may be sent to the corresponding small cell management entity through an X2 port or a downlink carrier of the base station.
The small cell management entity reports signaling for channel quality assessment of uplink data of the UE, and the signaling comprises one or more of the following: carrying one or more UE identities (including C-RNTI, resource location for receiving uplink data, UE ID, configuration information of uplink data); the small cell identifier (if an air interface is used between the small cell management entity and the base station, 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 determining whether to correctly demodulate, RSRP, and channel measurement quality).
The signaling (e.g. small cell configuration signaling) that the base station informs the small cell management entity of which UEs to configure for includes: UE identity, small cell identity (optionally, this parameter is not used if only one small cell management entity is notified, or if multiple small cell management entities are notified at the same time).
The signaling of the base station to inform the UE of the configured small cell includes one or more of: small cell identity, small cell frequency point, small cell index (referring to index adopted by small cell set configured to UE), and index of small cell subordinate to base station (referring to index of small cell set controlled by base station in whole macro cell).
It should be noted that, if the small cell management entity calculates the channel quality or power of the received uplink data, since the carrier frequency used by the small cell management entity in the future is greatly different from the carrier frequency of the small cell management entity receiving the UE uplink data, a compensation factor may be introduced to compensate for the loss caused by the fact that the carrier frequency of the small cell management entity receiving the UE uplink data is greatly different from the carrier frequency serving the UE in the future. The value of the compensation factor may be a fixed value, which may be an empirical value measured in actual deployment, or a reference value obtained by simulation. The compensation factor may be fixed, considering that the coverage area of the small cell is relatively small, and is generally only several tens of meters, so the variation range of the channel quality or power caused by the carrier frequency difference is limited.
In practical applications, the operation mode shown in fig. 3 can also be applied. In fig. 3. The base station triggers the small cell management entity to send a measurement signal by adopting the downlink frequency of the base station, the UE working in the macro cell discovers the small cells nearby by the same-frequency measurement, and reports the discovered small cells to the base station. The base station selects a proper small cell from the small cells reported by the UE to configure the UE, and triggers a small cell management entity of the small cell configured to the UE to send a measurement signal in the downlink frequency of the small cell, and meanwhile, the small cell management entity does not send the measurement signal in the downlink frequency of the base station any more. The base station informs the UE of the configured small cell, the UE receives the measurement signal sent by the small cell management entity at the downlink frequency of the small cell and reports the measurement result to the base station, and the base station selects a proper small cell for the UE to activate according to the measurement result.
The specific operation of the present invention is further illustrated by the following specific examples.
Example 1
In the inter-frequency heterogeneous network, a macro cell and a small cell subordinate to the macro cell are shown in fig. 1.
When a network is deployed, at least one carrier in carriers of a macro cell adopts a compatible carrier type, so that a larger coverage area is provided. The carrier of the small cell under the macro cell adopts a new carrier type, and the small cell is deployed in a hot spot area to provide better data representation for users.
The macro cell needs to remain on all the time. If the small cell under the macro cell does not provide service for the UE, keeping the small cell management entity of the small cell off (i.e. the air interface does not send and receive information).
For a UE operating in a macro cell and performing uplink and downlink data transmission with the macro cell, when a base station decides (as decided according to scheduling requirements) to configure a small cell for the UE, the base station triggers a subordinate small cell management entity to receive uplink data of the UE, and simultaneously informs the small cell management entity of relevant information (such as control information of the uplink data, and carrier frequency, UE identification information) necessary for receiving the uplink data of the UE. And after receiving the uplink data of the UE, the small cell management entity demodulates the uplink data, and if the uplink data is correctly demodulated, the small cell management entity informs the result to the base station. And the base station selects a small cell corresponding to a proper small cell management entity from the reported small cell management entities capable of being demodulated correctly to configure the UE, and at the moment, a plurality of small cells can be selected. And the base station informs the small cell management entity of the selected small cell, and the small cell management entity transmits the measurement signal and simultaneously informs the UE of the small cell configured for the UE. And the UE starts to measure the small cell configured to the UE and reports the measurement result to the base station. The base station determines the activated small cell of the UE according to the received measurement result (the load condition of the small cell can also be considered), and informs the activated small cell to the UE.
Example 2
In the inter-frequency heterogeneous network, a macro cell and a small cell subordinate to the macro cell are shown in fig. 1. The invention is also applicable to the case that the carrier type of the small cell is deployed to be compatible with the carrier type.
For the small cell compatible with the carrier type, optionally, the small cell management entity of the small cell can avoid the UE in the idle state from accessing the small cell by blocking the UE from accessing, for example, the small cell management entity may implement the blocking of the UE access through the cellBarred parameter in the system broadcast information. Specifically, it is determined that there is no UE in a connected state in the carrier-compatible small cell, and at this time, the UE access can be blocked only for the carrier-compatible small cell.
When the small cell compatible with the carrier prevents the UE from accessing, the macro cell needs to be kept in an on state all the time, and the small cell management entity subordinate to the macro cell is kept off (i.e., the air interface does not send and receive information).
For a UE operating in a macro cell and performing uplink and downlink data transmission with the macro cell, when a base station determines (e.g., the base station determines according to scheduling requirements) to configure a small cell for the UE, the base station triggers the UE to transmit an uplink reference signal, and triggers a subordinate small cell management entity to receive the uplink reference signal of the UE. The reference signal may be pre-agreed, for example, using an LTE-already-existing channel Sounding Reference Signal (SRS). 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 UE identification information. And after receiving the uplink reference signal of the UE, the small cell management entity evaluates the uplink channel quality by using the uplink reference signal, and if the evaluation result meets the requirement, the small cell management entity informs the base station of the evaluation result. The base station selects a suitable small cell from the small cells which can meet the channel quality requirement to configure the UE, and a plurality of small cells can be selected. And the base station informs the small cell management entity of the selected small cell, the small cell management entity transmits the measurement signal, and the base station simultaneously informs the UE of the small cell configured for the UE. The UE starts to measure the small cell configured for the UE and reports the measurement result to the base station; and the base station determines the activated small cell of the UE according to the received measurement result and the load condition (if any) of the small cell, and informs the activated small cell to the UE.
Example 3
For a small cell compatible with a carrier type, a small cell management entity of the small cell needs to be kept on; also, since the UE needs to be provided with the necessary services, the small cell management entity providing the camped small cell needs to keep sending the measurement signal to help the UE to make the necessary measurements for cell reselection.
For a connected UE operating in a macro cell and performing uplink and downlink data transmission with the macro cell, when a base station determines (e.g., the base station determines according to scheduling requirements) to configure a small cell for the UE, the base station triggers the UE to transmit an uplink reference signal, and triggers a subordinate small cell management entity to receive the uplink reference signal of the UE. The reference signal may be pre-agreed, for example, using LTE-already SRS. 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 UE identification information. And after receiving the uplink reference signal of the UE, the small cell management entity evaluates the uplink channel quality by using the uplink reference signal, and if the evaluation result meets the requirement, the small cell management entity informs the evaluation result to the base station to which the small cell management entity belongs. The base station selects a small cell corresponding to a suitable small cell management entity from small cell management entities capable of meeting the channel quality requirement to configure the UE, and at this time, a plurality of small cells can be selected. And the base station informs the selected small cell management entity and simultaneously informs the UE of the small cell configured for the UE. And the UE starts to measure the small cell configured for the UE, reports the measurement result to the base station, determines the small cell activated by the UE according to the received measurement result and the load condition (if any) of the small cell by the base station, and informs the activated small cell to the UE.
Example 4
Refer to fig. 1 and 3.
In the inter-frequency heterogeneous network, a macro cell and a small cell subordinate to the macro cell are shown in fig. 1.
At least one of the carriers of the macro cell is of a compatible carrier type to provide greater coverage when the network is deployed. The carrier of the small cell under the macro cell adopts a new carrier type and is deployed in a hot spot area so as to provide high data representation for users.
The macro cell needs to remain on all the time. The small cell management entity of the small cell under the macro cell remains off (i.e., the air interface does not send and receive information) if the UE is not served.
For a UE operating in a macro cell and performing uplink and downlink data transmission with the macro cell, when a base station determines (e.g., the base station determines according to a scheduling requirement (e.g., the load of the macro cell is too large)) to configure a small cell for the UE, the base station triggers a subordinate small cell management entity to send a measurement signal in the f1 carrier frequency, so that the UE can discover nearby small cells when performing intra-frequency measurement (the intra-frequency measurement is always performed by the UE and therefore does not need to be triggered). The UE informs the base station of the result of the same-frequency measurement, the base station determines a proper small cell to configure for the UE according to the received result of the same-frequency measurement, and triggers a small cell management entity of the small cell configured for the UE to send a measurement signal in the downlink frequency of the small cell management entity. The base station also informs the UE of the small cells configured for the UE, the UE performs measurement on the small cells configured for the UE, reports the measurement result to the base station, and the base station selects a proper small cell to activate the UE. This can prevent the UE from performing inter-frequency measurements in order to find a nearby small cell, thereby enabling efficient power saving.
As can be seen from the above description, in the present invention, in order to implement the small cell serving the UE, a flow shown in fig. 4 may be performed, where the flow includes the following steps:
step 410: the base station triggers the subordinate small cell management entity to receive uplink data, such as: and the base station triggers a subordinate small cell management entity to receive the uplink data sent by the UE.
Step 420: the base station acquires the quality of the uplink data reported by the small cell management entity, and then determines the small cell to be configured according to the quality, such as: and the base station receives the quality of the uplink data reported by the small cell management entity, and then determines the small cell configured for the UE according to the quality.
In summary, no matter the method, the device or the system, the technology for serving the UE by the small cell in the present invention can solve the problem of finding the small cell under the macro cell, so as to configure the small cell for the UE, and the network side and the UE have obvious energy saving effect.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing the relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in the form of hardware, and may also be implemented in the form of a software functional module. The present invention is not limited to any specific form of combination of hardware and software.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (48)
1. A method for enabling a small cell to serve User Equipment (UE), the method comprising:
the base station triggers a subordinate small cell management entity to receive uplink data;
the base station acquires the quality of the uplink data reported by the small cell management entity, and then determines the small cell to be configured according to the quality;
the base station acquires the quality of the uplink data reported by the small cell management entity, including the evaluation of the channel quality of the uplink data;
the method for the small cell management entity to perform the channel quality assessment comprises the following steps: the small cell management entity determines the channel quality by judging whether the received uplink data can be correctly mediated or not, or the small cell management entity determines the channel quality by calculating the received power of the received uplink data.
2. The method of claim 1, further comprising:
and the base station informs the UE and/or a corresponding small cell management entity of the small cell information of the small cell.
3. The method of claim 2,
the signaling when the base station notifies the small cell management entity includes: UE identity, small cell identity;
the signaling when the base station notifies the UE comprises one or more of the following: the method comprises the following steps of identifying a small cell, frequency points of the small cell, indexes of the small cell and indexes of subordinate small cells of a base station;
the small cell information includes one or more of: small cell identification, small cell frequency points and small cell indexes;
the UE identity is represented by one of the following: C-RNTI cell RNTI, resource position for receiving uplink data, UE ID, configuration information of the uplink data, and configuration information or index of uplink reference signals;
the small cell identity is represented by one of: the small cell location information comprises small cell indexes, small cell physical cell IDs, small cell virtual cell IDs, small cell location information and small cell frequency points.
4. The method of claim 1,
when a base station triggers a subordinate small cell management entity to receive uplink data, the base station informs the small cell management entity of receiving relevant information of the uplink data sent by UE;
the information related to the uplink data comprises one or more of the following: resource information, coding information, carrier frequency point information, uplink data type and UE identification of uplink data.
5. The method of claim 1, wherein the base station knows the quality of the uplink data reported by a small cell management entity, and comprises performing channel quality estimation on the uplink data:
the small cell management entity evaluates the channel quality of the received UE uplink data according to an appointed mode and reports an evaluation result to the base station; or,
and the base station receives the UE uplink data forwarded by the small cell management entity and evaluates the received uplink data.
6. The method of claim 5, wherein for small cell management entities that do not report channel quality, the base station considers that the small cells corresponding to these small cell management entities are not suitably configured for the UE.
7. The method of any one of claims 1 to 6, further comprising:
for a small cell suitable for being configured for a UE, a base station sends a small cell configuration signaling to a small cell management entity of the small cell, and notifies the small cell management entity that a corresponding small cell has been configured for the UE.
8. The method of claim 7, further comprising:
the small cell management entity receiving the small cell configuration signaling sends a measurement signal; and/or the presence of a gas in the gas,
the base station transmits small cell activation signalling to the small cell management entity.
9. The method of claim 7, wherein the method for the base station to trigger the subordinate small cell management entity is:
the base station sends a trigger signaling to the small cell management entity through an X2 port or a downlink carrier of the base station.
10. The method of claim 1,
before triggering, the UE capable of performing data interaction with the base station establishes 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 remains on 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 a macro cell controlled by the base station; the uplink data includes: control signaling or uplink reference signals or user data transmitted through a physical uplink control channel PUCCH or a physical uplink shared channel PUSCH.
11. A method for enabling a small cell to serve a UE, the method comprising:
the small cell management entity receives information for triggering the small cell management entity to receive uplink data, receives the uplink data according to the information, processes the received uplink data and sends a processing result;
a small cell management entity receives a small cell configuration signaling and learns whether a small cell corresponding to the small cell management entity is allocated or not;
when channel quality evaluation is performed in an agreed manner, 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.
12. The method of claim 11, wherein after the small cell management entity receives the uplink data,
the small cell management entity forwards the received uplink data to a base station, and the base station evaluates the channel quality of the uplink data and determines whether a small cell corresponding to the small cell management entity can be configured for the UE; or,
and the small cell management entity performs channel quality evaluation on the received uplink data according to an appointed mode and sends an evaluation result to the base station.
13. The method according to claim 12, wherein 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 is not configurable for the UE.
14. The method of claim 12, further comprising:
when the channel quality evaluation result meets the requirement, the base station sends a small cell configuration signaling to the small cell management entity to inform the small cell management entity that the corresponding small cell is configured for the UE; or, the base station determines, according to the received uplink data processing result sent by the small cell management entity, to configure the small cell corresponding to the small cell management entity for the UE, and sends a small cell configuration signaling to notify the small cell management entity that the small cell management entity has configured a corresponding small cell for the UE.
15. The method according to any one of claims 11 to 14,
after receiving the small cell configuration signaling, the small cell management entity also sends a measurement signal; and/or the small cell management entity receives small cell activation signaling sent by the base station to serve the UE.
16. The method of claim 11, further comprising:
when the small cell management entity calculates the channel quality or power of the received uplink data, the small cell management entity adopts a compensation factor to calibrate the calculated channel quality or power;
the compensation factor is a fixed value and is obtained through simulation or experience values.
17. A method for enabling a small cell to serve a UE, the method comprising:
the UE establishes RRC connection with a macro cell controlled by a base station and transmits uplink data through an uplink carrier of the macro cell;
the method comprises the steps that UE receives a signaling for configuring a small cell, which is sent by a base station through a downlink carrier of a macro cell;
wherein the signaling for configuring the small cell is obtained according to an evaluation of channel quality of the uplink data by a small cell management entity, and the evaluation of the channel quality includes: the small cell management entity determines the channel quality by judging whether the received uplink data can be correctly adjusted or the small cell management entity determines the channel quality by calculating the received power of the received uplink data.
18. The method of claim 17, further comprising:
the UE receives a measurement signal transmitted by a small cell management entity of a small cell configured for the UE, and feeds back a measurement result to the base station.
19. The method of claim 17 or 18, further comprising:
the UE receives signaling sent by the base station to activate the small cell management entity.
20. An apparatus for enabling a small cell to serve a UE, the apparatus comprising: the first receiving module is used for triggering the subordinate small cell management entity to receive uplink data; acquiring the quality of the uplink data reported by the small cell management entity, and determining a first processing module of the small cell to be configured according to the quality;
the base station acquires the quality of the uplink data reported by the small cell management entity, including the evaluation of the channel quality of the uplink data;
the method for the small cell management entity to perform the channel quality assessment comprises the following steps: the small cell management entity determines the channel quality by judging whether the received uplink data can be correctly mediated or not, or the small cell management entity determines the channel quality by calculating the received power of the received uplink data.
21. The apparatus of claim 20, further configured to:
and notifying the UE and/or a corresponding small cell management entity of the small cell information of the small cell.
22. The apparatus of claim 21,
the signaling when the device notifies the small cell management entity comprises: UE identity, small cell identity;
the signaling when the apparatus notifies the UE includes one or more of: the method comprises the following steps of identifying a small cell, frequency points of the small cell, indexes of the small cell and indexes of subordinate small cells of a base station;
the small cell information includes one or more of: small cell identification, small cell frequency points and small cell indexes;
the UE identity is represented by one of the following: C-RNTI, receiving the resource position of the uplink data, UEID, the configuration information of the uplink data and the configuration information or index of the uplink reference signal;
the small cell identity is represented by one of: the small cell location information comprises small cell indexes, small cell physical cell IDs, small cell virtual cell IDs, small cell location information and small cell frequency points.
23. The apparatus according to claim 20, wherein when the apparatus triggers a subordinate small cell management entity to receive uplink data, the apparatus is configured to notify the small cell management entity of information related to receiving uplink data sent by the UE;
the information related to the uplink data comprises one or more of the following: resource information, coding information, carrier frequency point information, uplink data type and UE identification of uplink data.
24. The apparatus of claim 20, wherein the apparatus, when knowing the quality of the uplink data reported by a small cell management entity, is configured to perform channel quality estimation on the uplink data:
triggering a small cell management entity to evaluate the channel quality of the received UE uplink data according to an appointed mode, and reporting an 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.
25. The apparatus of claim 24, wherein for small cell management entities that do not report channel quality, the apparatus is configured to consider that small cells corresponding to the small cell management entities are not suitable for UE configuration.
26. The apparatus of any one of claims 20 to 25, further configured to:
for a small cell which is suitable for being configured for the UE, sending small cell configuration signaling to a small cell management entity of the small cell to inform the small cell management entity that the corresponding small cell has been configured for the UE.
27. The apparatus of claim 26, wherein the apparatus is further configured to:
triggering the small cell management entity receiving the small cell configuration signaling to send a measurement signal; and/or the presence of a gas in the gas,
transmitting small cell activation signaling to the small cell management entity.
28. The apparatus of claim 26, wherein the apparatus, when triggering a subordinate small cell management entity, is configured to:
and sending a trigger signaling to a small cell management entity through an X2 port or a downlink carrier of the device.
29. The apparatus of claim 20,
before the triggering, the UE capable of performing data interaction with the device establishes RRC connection with a base station;
the small cell management entity capable of receiving uplink data is turned off or kept on for other UEs until triggered by the apparatus;
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 a macro cell controlled by the base station; the uplink data includes: control signaling or uplink reference signals or user data transmitted through the PUCCH or PUSCH.
30. The apparatus of claim 20, wherein the apparatus is a base station.
31. An apparatus for enabling a small cell to serve a UE, the apparatus comprising:
a second receiving module, configured to receive information for triggering the apparatus to receive uplink data, and receive the uplink data according to the information; the second processing module is used for processing the received uplink data; the second sending module is used for sending the processing result;
the second receiving module is further configured to receive a small cell configuration signaling to know whether the small cell corresponding to the apparatus is allocated;
when channel quality evaluation is performed in an agreed manner, 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.
32. The apparatus of claim 31, wherein the apparatus, after receiving the uplink data, is configured to:
forwarding the received uplink data to a base station, triggering the base station to perform channel quality evaluation on the uplink data, and determining whether a small cell corresponding to the small cell management entity can be configured for the UE; or,
and performing channel quality evaluation on the received uplink data according to an appointed mode, and sending an evaluation result to the base station.
33. The apparatus of claim 32, wherein when the base station does not receive the evaluation result sent by the apparatus, the base station is configured to consider the small cell corresponding to the apparatus as being not configurable for the UE.
34. The apparatus of claim 32, wherein the base station is configured to:
when the channel quality evaluation result meets the requirement, sending a small cell configuration signaling to the device, and informing the device that a corresponding small cell is configured for the UE; or, according to the received uplink data processing result sent by the apparatus, determining to configure the small cell corresponding to the apparatus for the UE, and sending a small cell configuration signaling to notify the apparatus that a corresponding small cell has been configured for the UE.
35. The apparatus of any one of claims 32 to 34,
after the device receives the small cell configuration signaling, the device is further configured to send a measurement signal; and/or receiving small cell activation signaling transmitted by a base station to serve the UE.
36. The apparatus of claim 32,
the device is used for calibrating the calculated channel quality or power by adopting 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 through simulation or experience values.
37. The apparatus of claim 32, wherein the apparatus is a small cell management entity.
38. An apparatus for enabling a small cell to serve a UE, the apparatus comprising: for
A third connection module for establishing RRC connection with the macro cell controlled by the base station; a third sending module, configured to send uplink data through an uplink carrier of the macro cell; and the number of the first and second groups,
a third receiving module, configured to receive signaling configuring the small cell sent by the base station through the downlink carrier of the macro cell;
wherein the signaling for configuring the small cell is obtained according to an evaluation of channel quality of the uplink data by a small cell management entity, and the evaluation of the channel quality includes: the small cell management entity determines the channel quality by judging whether the received uplink data can be correctly adjusted or the small cell management entity determines the channel quality by calculating the received power of the received uplink data.
39. The apparatus of claim 38, further configured to:
and receiving a measurement signal transmitted by a small cell management entity of the self-configured small cell, and feeding back a measurement result to the base station.
40. The apparatus of claim 38 or 39, further configured to:
and receiving signaling which is transmitted by the base station and activates the small cell management entity.
41. The apparatus of claim 38, wherein the apparatus is a UE.
42. A method for enabling a small cell to serve a UE, the method comprising:
the base station triggers a subordinate small cell management entity to transmit a measurement signal by adopting the downlink frequency of the base station;
the base station receives the measurement result aiming at the small cell, and determines the small cell to be configured according to the measurement result;
the base station receiving measurement results for small cells, thereby determining small cells to be configured, comprising: and determining the small cell to be configured according to the demodulation of the received uplink data or the judgment of the channel quality by the base station.
43. The method of claim 42,
the method for determining the small cell to be configured comprises the following steps: and the base station selects a proper small cell from the small cells reported by the UE to configure the UE.
44. The method of claim 42 or 43, further comprising:
the base station triggers a small cell management entity of a small cell configured to the UE to send a measurement signal in the downlink frequency of the small cell; the base station informs the UE of the small cell for which it is configured.
45. The method of claim 44, further comprising:
and the UE receives the measurement signal sent by the small cell management entity at the downlink frequency of the small cell and reports the measurement result to the base station, and the base station selects a proper small cell for the UE to activate according to the measurement result.
46. A system for enabling a small cell to serve a UE, the system comprising a base station, a small cell management entity; wherein,
the base station is used for triggering a subordinate small cell management entity to receive uplink data sent by the UE; acquiring the quality of the uplink data reported by the small cell management entity, and determining the small cell configured for the UE according to the quality; the base station acquires the quality of the uplink data reported by the small cell management entity, including the evaluation of the channel quality of the uplink data;
the method for the small cell management entity to perform the channel quality assessment comprises the following steps: the small cell management entity determines the channel quality by judging whether the received uplink data can be correctly mediated or not, or the small cell management entity determines the channel quality by calculating the receiving power of the received uplink data;
the small cell management entity is used for receiving information which is sent by the base station and used for triggering the small cell management entity to receive UE uplink data, receiving the UE uplink data according to the information, processing the received uplink data and sending a processing result to the base station; and receiving a small cell configuration signaling sent by a base station, and acquiring whether a small cell corresponding to the small cell management entity is configured by the UE.
47. The system of claim 46,
the small cell management entity receiving the small cell configuration signaling is further configured to send a measurement signal; and/or the presence of a gas in the gas,
the base station is further configured to send small cell activation signaling to the small cell management entity.
48. The system of claim 46 or 47,
the system also comprises UE, which is used for establishing RRC connection with the macro cell controlled by the base station and sending uplink data through the uplink carrier wave of the macro cell; and receiving signaling for configuring the small cell, which is transmitted by the base station through the downlink carrier of the macro cell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210375551.7A CN103716858B (en) | 2012-09-29 | 2012-09-29 | It is a kind of to realize that cell is the methods, devices and systems of UE service |
| PCT/CN2013/081506 WO2014048182A1 (en) | 2012-09-29 | 2013-08-15 | Method, device and system for small cell service provision to ue |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210375551.7A CN103716858B (en) | 2012-09-29 | 2012-09-29 | It is a kind of to realize that cell is the methods, devices and systems of UE service |
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| JP6209898B2 (en) * | 2013-08-12 | 2017-10-11 | ソニー株式会社 | COMMUNICATION CONTROL DEVICE, COMMUNICATION CONTROL METHOD, AND TERMINAL DEVICE |
| CN105208543A (en) * | 2014-06-09 | 2015-12-30 | 中国移动通信集团公司 | Discovery method and system for small cell, base station, and user equipment |
| CN105307243A (en) * | 2014-07-22 | 2016-02-03 | 中兴通讯股份有限公司 | Wireless access network as well as method and device for selecting service small cell of wireless access network |
| WO2017084005A1 (en) * | 2015-11-16 | 2017-05-26 | 华为技术有限公司 | Method for cell measurement report and user equipment |
| CN105916170B (en) * | 2016-04-19 | 2019-02-01 | 宇龙计算机通信科技(深圳)有限公司 | Authorize the small cell configuring method of terminated, relevant device and the system of frequency spectrum |
| CN108271185B (en) * | 2017-01-03 | 2020-09-04 | 中国移动通信有限公司研究院 | Uplink pilot frequency measurement method and device |
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