CN102340873B - In carrier aggregation, the adjustment of component carrier is realized to method and the device of control - Google Patents
In carrier aggregation, the adjustment of component carrier is realized to method and the device of control Download PDFInfo
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- CN102340873B CN102340873B CN201010236759.1A CN201010236759A CN102340873B CN 102340873 B CN102340873 B CN 102340873B CN 201010236759 A CN201010236759 A CN 201010236759A CN 102340873 B CN102340873 B CN 102340873B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
- H04L5/0096—Indication of changes in allocation
- H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
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Abstract
The invention discloses the method and the device that in a kind of carrier aggregation, the adjustment of component carrier are realized to control, comprise the ability according to subscriber equipment, the adjustment of component carrier is controlled.Specifically comprise: base station, when carrying out carrier wave adjustment (as increased or replacing or activate), according to the ability information comprising the subscriber equipment of transceiver ability information that UE reports, determines the transceiver of component carrier and base station data communication; Or, when exceeding the component carrier of the limit of power of UE in base station by RRC reprovision command configuration, UE returns configuration failure to base station, notify that failure cause is override capability scope simultaneously, and UE does not perform RRC process of reconstruction, ignore the order of RRC reprovision, continue the configuration before adopting the order of RRC reprovision.By the inventive method, decrease in carrier aggregation, due to the adjustment to component carrier, the service disconnection that such as increase or deletion or replacement operation or activation deactivating operation etc. cause, and avoid possible RRC process of reconstruction.
Description
Technical Field
The present invention relates to Carrier Aggregation (CA), and in particular, to a method and an apparatus for controlling adjustment of component carriers in carrier aggregation.
Background
In a Long Term Evolution (LTE) system, the maximum supported bandwidth is 20MHz, and a UE reports its own capability information when requested by a base station, where the capability information includes supported frequency band information. Fig. 1 is a schematic flow diagram of capability reporting of an existing UE, and as shown in fig. 1, a base station requests the UE to report a capability information message (UE capability acquisition) to notify the UE (step 100), and after receiving the capability information message, the UE reports its capability information to the base station through the UE capability information message (UE capability information) (step 101).
In order to provide a higher data rate to a mobile user, a Carrier Aggregation (CA) technology is proposed by an LTE-a (long term evolution advanced), which aims to provide a larger bandwidth for a UE with corresponding capability, thereby improving the peak rate of the UE. In LTE, the maximum downlink transmission bandwidth supported by the system is 20MHz, and carrier aggregation is applied to aggregate two or more Component Carriers (CCs) to support a transmission bandwidth greater than 20MHz and not greater than 100MHz at most. The carrier aggregation may be divided into continuous carrier aggregation and discontinuous carrier aggregation according to whether each component carrier is continuous in the frequency domain.
In order to support carrier aggregation, the radio frequency structure of the UE needs to meet corresponding requirements. For aggregation of contiguous component carriers, the UE needs to have one radio transceiver device (including a Receiver device (Rx) and a Transmitter device (Tx)) with a maximum bandwidth exceeding 20MHz, or a plurality of Rx and Tx devices with a maximum bandwidth of 20MHz simultaneously operating on contiguous component carriers. For non-continuous component carrier aggregation, the UE needs to have multiple Rx and Tx with maximum bandwidth of 20MHz to simultaneously operate on the non-continuous component carriers.
When the UE is in a connected state, in order to meet the requirement of service flow increase, the base station performs control operation of component carrier increase; when the service flow is reduced, the base station performs the control operation of deleting the component carrier; when the signal quality of the component carrier currently undergoing aggregation is deteriorated, the base station performs control operation of component carrier deletion or replacement. When the adjustment of the component carriers is controlled, because the UE needs to adjust the center frequency point of the work according to the currently aggregated component carriers, when the UE has only one transceiver device, the transceiver device cannot receive and transmit data for a period of time each time the operation is performed, thereby causing service interruption.
Even if the UE has multiple transceiving devices, service interruption may be caused if the selected component carrier is not reasonable. Such as: assuming that the UE has two transceivers, only one of which is currently enabled, if the selected component carrier is not reasonable, the base station selects a component carrier contiguous to the currently used component carrier to configure to the UE, and the adjustment of the component carrier will involve the currently used transceiver and make an adjustment to the transceiver, thereby causing service interruption.
In addition, since the component carrier configured by the base station is beyond the capability range of the UE, the UE performs a Radio Resource Control (RRC) connection reestablishment process, which may also cause service interruption.
Due to the burst characteristic of the service, the concept of carrier activation/deactivation is introduced into the LTE-A system. The UE only receives and transmits data on the activated carriers, and for the carriers which are not used temporarily, the base station deactivates the carriers through explicit command notification or implicit rules, and on the deactivated carriers, the UE does not monitor a Physical Downlink Control Channel (PDCCH) and does not receive data on a Physical Downlink Shared Channel (PDSCH), so that the purpose of saving power is achieved. The above-mentioned service interruption may also occur when the UE activates or deactivates the component carrier.
An LTE-AUE with carrier aggregation capability can simultaneously transmit and receive data on multiple component carriers in a connected state, a base station may assign a Primary Component Carrier (PCC) to a UE through explicit configuration or according to a protocol agreement, where other component carriers are referred to as Secondary Component Carriers (SCC), a serving cell on the PCC is referred to as a primary serving cell (Pcell, PrimaryCell), and a serving cell on the SCC is referred to as a secondary serving cell (Scell, SecondaryCell). If the downlink PCC (DLPCC) has Radio Link Failure (RLF), the UE needs to execute the reconstruction process of the RRC connection; the UE also needs to perform an RRC reestablishment procedure if the reconfiguration fails.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method and an apparatus for controlling adjustment of component carriers in carrier aggregation, which can avoid occurrence of service interruption to the maximum extent.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for controlling adjustment of component carriers in carrier aggregation comprises the following steps: and controlling the adjustment of the component carrier wave according to the capability of the User Equipment (UE).
The controlling the adjustment of the component carrier comprises:
the base station requests the UE to report the capability information, and the UE reports the capability information of the user equipment containing the capability information of the self-receiving and transmitting equipment to the base station;
when the base station carries out carrier adjustment, the base station determines the transceiving equipment used by the UE for the data communication between the component carrier and the base station according to the transceiving equipment capability information reported by the UE.
The transceiver device capability information includes the number of supported independent frequency bands or the number of transceiver devices.
The transceiver device capability information may further include respective individual frequency bands or corresponding bandwidths supported by the transceiver device, or may include a total bandwidth supported.
The controlling the adjustment of the component carrier comprises:
the base station configures component carriers for the UE through a Radio Resource Control (RRC) reconfiguration command according to the frequency band supported by the UE;
when the base station configures the component carrier beyond the capability range of the UE, the UE returns configuration failure to the base station.
When the base station which fails to receive the configuration decides to switch the UE to the target base station, the method further comprises:
the base station which receives the configuration failure sends a switching request message to a target base station, and the switching request message carries the capability information of the receiving and sending equipment reported by the UE; the target base station responds a switching request response message to the base station which fails to be configured, wherein the switching request response message carries component carrier information configured for the UE;
the base station which receives the configuration failure notifies the UE of the component carrier information configured for the UE through a switching command; after receiving the configuration information, the UE responds to the base station which fails to receive the configuration to fail to switch if finding that the component carrier information configured by the target base station exceeds the capability of the UE. Meanwhile, the UE ignores the switching command, continues to maintain the configuration before receiving the switching command and does not initiate an RRC reestablishment process.
And the UE sends a configuration failure or a switching failure back to the base station and simultaneously informs that the failure reason is beyond the capability range.
The method further comprises the following steps: and the UE ignores the RRC reconfiguration command or the switching command and continues to adopt the configuration before the RRC reconfiguration command or the switching command.
The adjusting of the component carriers comprises: component carrier addition, component carrier deletion, component carrier replacement, or component carrier activation deactivation.
A device for controlling the adjustment of component carriers in carrier aggregation at least comprises a control module, which is used for controlling the adjustment of the component carriers according to the capability of user equipment.
The apparatus is disposed in a base station; the apparatus also includes a first receiving module, wherein,
the first receiving module is used for receiving the capability information of the user equipment containing the capability information of the self-receiving and transmitting equipment reported by the UE and outputting the capability information to the adjusting module;
and the control module is specifically used for determining the transceiving equipment used by the UE for data communication between the component carrier and the base station according to the transceiving equipment capability information reported by the UE when the carrier is adjusted.
The transceiver device capability information includes the number of supported independent frequency bands or the number of transceiver devices.
The transceiver device capability information further includes bandwidths corresponding to the individual frequency bands or transceiver devices, or includes a total bandwidth supported.
The apparatus is provided in a user equipment; the apparatus also includes a second receiving module, wherein,
a second receiving module, configured to receive, from the base station, an RRC reconfiguration message that the base station configures the component carrier for the UE according to the frequency band supported by the UE;
the control module is specifically configured to, when it is determined that the base station configures a component carrier that exceeds the capability range of the UE itself, return a configuration failure to the base station, and notify that the failure reason is the capability range exceeding. The method specifically comprises the following steps: the UE reports the capability information of the user equipment containing the capability information of the self transceiver to the base station, and when the base station carries out carrier adjustment (such as addition, replacement or activation), the base station determines transceiver for data communication between the component carrier and the base station according to the capability information of the transceiver reported by the UE; or the base station configures the component carrier for the UE through the RRC reconfiguration command according to the frequency band supported by the UE, if the base station configures the component carrier beyond the capability range of the UE, the UE returns the configuration failure to the base station, and simultaneously informs that the failure reason is beyond the capability range, and the UE does not execute the RRC reestablishment process, ignores the RRC reconfiguration command and continues to adopt the configuration before the RRC reconfiguration command. The method of the invention reduces the service interruption caused by the adjustment of the component carrier, such as addition or deletion or replacement operation, or activation and deactivation operation, and avoids the possible RRC reconstruction process in the carrier aggregation.
Drawings
Fig. 1 is a schematic flow chart of reporting the capability of the existing UE;
fig. 2 is a flowchart illustrating an implementation example of a method for controlling adjustment of component carriers in carrier aggregation according to the present invention;
fig. 3 is a flowchart illustrating another implementation example of a method for controlling adjustment of component carriers in carrier aggregation according to the present invention;
fig. 4 is a diagram illustrating component carrier adjustment according to a first embodiment of the present invention;
fig. 5 is a diagram illustrating component carrier adjustment according to a second embodiment of the present invention;
fig. 6 is a diagram illustrating component carrier adjustment according to a third embodiment of the present invention;
fig. 7 is a diagram illustrating component carrier adjustment according to a fourth embodiment of the present invention;
fig. 8 is a diagram illustrating component carrier adjustment according to a fifth embodiment of the present invention.
Detailed Description
When the added component carriers default to an activated state or the component carriers do not distinguish the activated/deactivated state, when the UE has only one transceiver device and the base station configures the component carriers for the UE (i.e., adjusts the component carriers of the UE), the UE needs to adjust the operation of the transceiver device such as the center frequency point according to the currently aggregated component carriers; similarly, when the base station deletes or replaces the component carrier, the above operation also needs to be performed, and the above operation necessarily causes service interruption of the UE; when the UE has multiple transceiver devices and the base station configures the component carrier for the UE, if the transceiver device responsible for data communication between the newly configured component carrier and the base station is also responsible for data communication between other configured component carriers and the base station, or when the base station deletes the component carrier, if the transceiver device responsible for data communication between the deleted component carrier and the base station is also responsible for data communication between other component carriers that have not been deleted and the base station, the UE needs to adjust the operation such as the center frequency point of the transceiver device according to the currently aggregated component carrier, and execute the above operation, and the service of the UE will be interrupted.
When the added component carrier is in a deactivation state by default, the data communication with the base station can be carried out only by activating through a media access control unit (MACCE), at this time, the adjustment operation of the UE on the transceiver device is executed after receiving an activation or deactivation command, that is, the service interruption occurs after receiving the activation or deactivation command.
The following embodiments are described based on the first case (after component carrier configuration, the active state is used, and data communication can be directly performed with the base station). In the second case (the component carrier is in a deactivated state after being configured, and data communication with the base station can be performed only after receiving the activated MACCE), similar to the first case, according to the method of the present invention, those skilled in the art can easily implement the method, and details will not be described again.
The method for controlling the adjustment of the component carrier in the carrier aggregation comprises the following steps: the adjustment of the component carriers is controlled according to the capability of the user equipment. The specific implementation comprises the following two methods:
fig. 2 is a flowchart illustrating an implementation embodiment of a method for controlling adjustment of component carriers in carrier aggregation according to the present invention, where as shown in fig. 2, a first method includes:
the base station requests the UE to report a capability information message (step 200), the UE reports the capability information of the UE including the capability information of its own transceiver device to the base station (step 201), and when the base station performs carrier adjustment (such as addition, replacement, or activation), the base station determines the transceiver device used by the UE for data communication between the component carrier and the base station according to the transceiver device capability information reported by the UE (step 202). For example, the UE has two transceiver devices, even if the base station configures continuous component carriers, the base station may designate the UE to enable another transceiver to be responsible for data communication between the newly added component carrier and the base station, and the enabled transceiver device continues to perform data communication with the base station without performing any operation, so that service interruption is not caused. Through step 202, the base station realizes that continuous execution of services is ensured to the greatest extent according to the capability information of the transceiver device reported by the UE, and a specific strategy is easily obtained after the base station obtains the capability information of the transceiver device reported by the UE.
The reported transceiver equipment capability information comprises: the number of independent frequency bands or the number of transceiving equipment is supported; and may further include the respective individual frequency bands or the respective bandwidths supported by the transceiving devices, or include the total bandwidths supported.
Fig. 3 is a flowchart illustrating another implementation example of the method for controlling adjustment of component carriers in carrier aggregation according to the present invention, and as shown in fig. 3, the second method includes:
the base station configures component carriers for the UE through an RRC reconfiguration command according to a frequency band supported by the UE (step 300), if the base station configures the component carriers beyond the capability range of the UE (step 301), the UE returns configuration failure to the base station and can inform that the failure reason is beyond the capability range (step 302), the UE does not execute an RRC reestablishment process, ignores the RRC reconfiguration command and continues to adopt the configuration before the RRC reconfiguration command (step 303). In the invention, the RRC reconfiguration failure can not cause RRC reconstruction, namely the UE keeps the configuration before receiving the RRC reconfiguration message and ignores the RRC reconfiguration. Compared with the prior art, the method of the invention has the advantages that for the RRC reconfiguration process, only the base station is configured with the component carrier which exceeds the capability range of the UE, and the current service of the UE is not influenced. In step 301, whether the component carrier configured by the base station is a component carrier beyond the capability range of the UE is known by the UE, and will be described in the following embodiments by way of example, but is not used to limit the protection scope of the present invention.
The method of the invention reduces the service interruption caused by the adjustment of the component carrier, such as addition or deletion or replacement operation, or activation and deactivation operation, and avoids the possible RRC reconstruction process in the carrier aggregation.
Aiming at the method, the invention also provides a device for controlling the adjustment of the component carrier in the carrier aggregation. The device at least comprises a control module used for controlling the adjustment of the component carrier wave according to the capability of the user equipment.
When the device of the invention is arranged in a base station, the device further comprises a first receiving module, wherein,
and the first receiving module is used for receiving the capability of the user equipment containing the capability information of the self-receiving and sending equipment reported by the UE and outputting the capability to the adjusting module.
And the control module is specifically used for determining the transceiving equipment for data communication between the component carrier and the base station according to the transceiving equipment capability information reported by the UE when the carrier is adjusted.
When the device of the present invention is provided in a user equipment, the device further comprises a second receiving module. Wherein,
and the second receiving module is used for receiving the RRC reconfiguration message which is sent from the base station, configured by the base station according to the frequency band supported by the UE and used for configuring the component carrier for the UE.
And the control module is specifically used for returning configuration failure to the base station when the base station is determined to be configured with the component carrier beyond the capability range of the UE, and simultaneously informing that the failure reason is beyond the capability range.
The process of the present invention will be described in detail with reference to examples.
Fig. 4 is a diagram illustrating component carrier adjustment according to a first embodiment of the present invention, where in fig. 4, a blank indicates an idle frequency band and a small grid shadow indicates a used frequency band. In the first embodiment, it is assumed that the UE resides in CC1 in carrier aggregation cell 1, and carrier aggregation cell 1 supports aggregation of three component carriers, which are CC1 (the lower row center frequency is 2120MHz, the lower row center frequency is band1, the bandwidth is 20MHz), CC2 (the lower row center frequency is 2140MHz, the lower row center frequency is band1, the bandwidth is 20MHz), CC3 (the lower row center frequency is 879MHz, the lower row center frequency is band5, the bandwidth is 20MHz), the UE has a transceiver (denoted as R × T × 1), and the supported bandwidth is 40MHz, as shown in fig. 4 (a).
Suppose that, due to the requirement of upper layer service, the UE initiates an RRC connection establishment request (mainly including a random access procedure) on the CC1, after the random access procedure is completed, the UE enters a connected state, where the CC1 is PCC, the serving cell on the CC1 is Pcell, the operating center frequency point of the transceiver is 2120MHz, and the bandwidth is 20MHz, as shown in fig. 4 (b).
Then, the base station requests the UE to report the capability information of the transceiver device, where the capability information of the transceiver device reported by the UE includes: the list of supported bands, such as band1/2/5, and the number of supported independent bands, which is 1 in the first embodiment; further, the bandwidth supported by the independent band, which is 40MHz in the first embodiment, may also be included.
Suppose that the base station needs to configure component carriers due to an increase in traffic flow. According to the capability information of the transceiver equipment reported by the UE, the base station learns that the UE can only support continuous component carriers, and then the CC2 is configured for the UE to carry out carrier aggregation, wherein the bandwidth is 20 MHz; moreover, according to the capability information of the transceiver device reported by the UE, since the UE has only one transceiver device, the transceiver device may not be designated to be responsible for data communication between the CC2 and the base station.
The UE adjusts the working central frequency point of the transceiver to be 2130MHz and the bandwidth to be 40MHz according to the frequency points of CC1 and CC2, and the service is in an interruption state in the adjustment process. After the adjustment, the UE performs data communication with the base station through the CC1 and the CC2, as shown in fig. 4 (c). This embodiment emphasizes an implementation method that, under the condition of a single transceiver, a base station may select configured component carriers according to the transceiver capability information reported by the UE.
If the secondary component carrier has an activated and deactivated state, after the base station configures the CC2 for the UE, the UE does not perform any operation, and the transceiver device is adjusted after receiving the MACCE activated by the base station. The second embodiment and the third embodiment are also similar hereinafter.
Fig. 5 is a diagram illustrating component carrier adjustment according to a second embodiment of the present invention, where in fig. 5, a blank indicates an idle frequency band and a small grid shadow indicates a used frequency band. In the second embodiment, it is assumed that the UE resides in CC1 in carrier aggregation cell 1, and carrier aggregation cell 1 supports aggregation of three component carriers, namely CC1 (at 2120MHz in the lower row center frequency point, home band1 with a bandwidth of 20MHz), CC2 (at 2140MHz in the lower row center frequency point, home band1 with a bandwidth of 20MHz), and CC3 (at 879MHz in the lower row center frequency point, home band5 with a bandwidth of 20MHz), and the UE has two transceiving devices (denoted as R × T × 1 and R × T × 2, respectively) and supports bandwidth of 20MHz, 40MHz, as shown in fig. 5 (a).
Suppose that, due to the requirement of upper layer service, the UE initiates an RRC connection establishment request (mainly including a random access procedure) on the CC1, and after the random access procedure is completed, the UE enters a connected state, where the CC1 is PCC, the serving cell on the CC1 is Pcell, the operating center frequency point of the second transceiver is 2120MHz, and the bandwidth is 20MHz, as shown in fig. 5 (b).
Then, the base station requests the UE to report the capability information of the transceiver device, where the capability information of the transceiver device reported by the UE includes: the list of bands supported by the UE, such as band1/2/5, and the number of independent bands supported, which is 2 in the second embodiment; further, the bandwidth supported by the independent band can be included, and the second embodiment is 20MHz/40 MHz; further, a transceiver currently responsible for data communication between the CC1 and the base station may be further included, for example, an indication information is added to the independent band supported bandwidth, and in the second embodiment, the indication information indicates a second independent band.
Suppose that the base station needs to configure component carriers due to an increase in traffic flow. According to the capability information of the UE, the base station knows that the UE supports both continuous and discontinuous component carriers, but the PCC is responsible for communication with the base station by the second UE, so the base station decides to configure the CC3 for the UE to perform carrier aggregation, the bandwidth is 20MHz, and may designate the UE responsible for data communication between the CC3 and the base station as the first UE (at this time, the UE may not designate the first UE because the CC3 and the CC1 are not continuous, and therefore the UE also knows that the first UE must be enabled to be responsible for data communication between the CC3 and the base station).
The UE starts the first transceiver to be responsible for data communication between the CC3 and the base station, the working center frequency point of the transceiver is 879MHz, the bandwidth is 20MHz, and the second transceiver does not need to be adjusted. After the adjustment, the UE performs data communication with the base station through the CC1 and the CC3, as shown in fig. 5 (c).
Assuming that the UE is subsequently configured with CC2 for carrier aggregation due to the increase of traffic flow, the bandwidth is 20MHz, and the transceiver responsible for CC2 and data 2 of the base station is designated as the second transceiver (which may not be designated at this time because CC2 and CC1 are consecutive, so the UE knows that the second transceiver must be activated to be responsible for data communication between CC2 and the base station); the UE starts the second transceiver device to be responsible for data communication between the CC2 and the base station, the operating center frequency point of the transceiver device is 2130MHz, the bandwidth is 20MHz, and the first transceiver device does not need to be adjusted. After the adjustment, the UE performs data communication with the base station through CC1, CC2, and CC3, as shown in fig. 5 (d).
Later, assume that the base station needs to delete component carriers due to traffic reduction. According to the condition of the component carriers aggregated by the current UE, the base station may delete CC2, or delete CC 3:
if the CC2 is deleted, the second transceiver needs to be adjusted, as shown in fig. 5(e), and since the first transceiver does not need to be adjusted, the service will not be interrupted, and then if the CC3 needs to be deleted, the service will still not be interrupted; if CC3 is deleted, the first transceiver is turned off and the second transceiver is unaffected so that service is not interrupted, but subsequently if CC2 needs to be deleted, service is interrupted. In contrast, it is more reasonable to prioritize the deletion of the component carrier on the high bandwidth transceiver device (CC 2 on the second transceiver device in this embodiment).
It should be noted that, as known by those skilled in the art, if CC deletion is caused by reduced signal quality, the base station can only delete the component carriers with poor signal quality first.
Fig. 6 is a diagram illustrating component carrier adjustment according to a third embodiment of the present invention, where in fig. 6, a blank indicates an idle frequency band and a small grid shadow indicates a used frequency band. In the third embodiment, it is assumed that the UE resides in CC1 in carrier aggregation cell 1, and carrier aggregation cell 1 supports aggregation of three component carriers, which are CC1 (the lower row center frequency is 2120MHz, the lower row center frequency is home band1, the bandwidth is 20MHz), CC2 (the lower row center frequency is 2140MHz, the home band1, the bandwidth is 20MHz), and CC3 (the lower row center frequency is 879MHz, the lower row center frequency is home band5, the bandwidth is 20MHz), and the UE has two transceiving devices (denoted as R × T × 1 and R × T × 2, respectively), and supports bandwidth of 20MHz, 40MHz, as shown in fig. 6 (a).
Suppose that, due to the requirement of upper layer service, the UE initiates an RRC connection establishment request (mainly including a random access procedure) on the CC1, and after the random access procedure is completed, the UE enters a connected state, where the CC1 is PCC, the serving cell on the CC1 is Pcell, the operating center frequency point of the second transceiver is 2120MHz, and the bandwidth is 20MHz, as shown in fig. 6 (b).
Then, the base station requests the UE to report the capability information of the transceiver device, where the capability information of the transceiver device reported by the UE includes: a supported band list, for example, including band1/2/5, and the number of transceivers (in this embodiment, 2); further, the bandwidth supported by each transceiver device (20 MHz/40MHz in this embodiment) or the total bandwidth supported by all transceiver devices (60 MHz in this embodiment) may also be included; further, a transceiver currently responsible for data communication between the CC1 and the base station may be included (e.g., an indication information added to the supported bandwidth of the independent band, which is the second independent band in the third embodiment).
Suppose that the base station needs to configure component carriers due to an increase in traffic flow. According to the capability information of the transceiver equipment reported by the UE, the base station learns that the UE supports both continuous component carriers and discontinuous component carriers, and can configure the component carriers of 40MHz for aggregation currently. However, the PCC is responsible for communication with the base station by the second transceiver device, so the base station decides to configure the UE with the CC3 for carrier aggregation, the bandwidth is 20MHz, and the transceiver device responsible for data communication between the CC3 and the base station may be designated as the first transceiver device (this case may not be designated because the CC3 and the CC1 are not contiguous, so the UE knows that the first transceiver device must be activated to be responsible for data communication between the CC3 and the base station).
The UE starts the first transceiver to be responsible for data communication between the CC3 and the base station, the working center frequency point of the transceiver is 879MHz, the bandwidth is 20MHz, and the second transceiver does not need to be adjusted. After the adjustment, the UE performs data communication with the base station through the CC1 and the CC3, as shown in fig. 6 (c).
Fig. 7 is a diagram illustrating component carrier adjustment according to a fourth embodiment of the present invention, where in fig. 7, a blank indicates an idle frequency band and a small grid shadow indicates a used frequency band. In the fourth embodiment, it is assumed that the UE resides in CC1 in carrier aggregation cell 1, and carrier aggregation cell 1 supports aggregation of three component carriers, namely CC1 (at 2120MHz in the lower row center frequency point, home band1 with a bandwidth of 20MHz), CC2 (at 2140MHz in the lower row center frequency point, home band1 with a bandwidth of 20MHz), and CC3 (at 879MHz in the lower row center frequency point, home band5 with a bandwidth of 20MHz), and the UE has two transceiving devices (denoted as R × T × 1 and R × T × 2, respectively) and supports bandwidth of 20MHz, as shown in fig. 7 (a). The carrier aggregation cell 1 belongs to the base station 1.
Suppose that, due to the requirement of upper layer service, the UE initiates an RRC connection establishment request (mainly including a random access procedure) on the CC1, after the random access procedure is completed, the UE enters a connected state, where the CC1 is PCC, the serving cell on the CC1 is Pcell, the center frequency point of the first transceiver device is 2120MHz, and the bandwidth is 20MHz, as shown in fig. 7 (b).
Then, the base station 1 requests the UE to report the transceiver device capability information, and the UE reports the supported band list, such as band 1/2/5.
It is assumed that the base station 1 needs to configure component carriers due to an increase in traffic volume. According to the capability information of the transceiver equipment reported by the UE, the base station 1 knows that the frequency band supported by the UE is band 1/2/5. Therefore, the base station 1 determines to configure the CC2 for the UE to perform carrier aggregation, and sends the UE with a bandwidth of 20MHz through an RRC reconfiguration command.
After receiving the RRC reconfiguration command, the UE starts a second transceiver device to be responsible for data communication between the CC2 and the base station 1, where the operating center frequency point of the transceiver device is 2140MHz, the bandwidth is 20MHz, and the first transceiver device does not need to be adjusted. After the adjustment, the UE performs data communication with the base station 1 through the CC1 and the CC3, as shown in fig. 7 (c).
It is assumed that the base station 1 needs to configure component carriers as traffic flow continues to increase. According to the capability information of the transceiver equipment reported by the UE, the base station 1 knows that the frequency band supported by the UE is band 1/2/5. Therefore, the base station 1 determines to configure the CC3 for the UE to perform carrier aggregation, where the bandwidth is 20MHz, and sends the carrier aggregation to the UE through an RRC reconfiguration command; after receiving the RRC reconfiguration command, the UE finds that the capability exceeds its own capability, and responds to the base station 1 that the RRC reconfiguration failure occurs, which may carry the reason for the failure to be the capability exceeding range. Meanwhile, the UE ignores the RRC reconfiguration command, continues to maintain the configuration before receiving the RRC reconfiguration command (i.e., performs data communication with the base station 1 through the CC1 and the CC 3), and does not initiate the RRC reestablishment procedure.
In this embodiment, exceeding the capability range means that the transceiver of the UE cannot support a larger bandwidth (in this embodiment, the UE can only support 40 MHz); or, the transceiver device of the UE cannot support more non-contiguous component carriers (in this embodiment, the UE can only support 2 non-contiguous component carriers, and although the CC1 and the CC2 are contiguous, the UE cannot support the CC3 for aggregation because of its capability and processing with different transceiver devices). In this embodiment, after receiving the RRC reconfiguration failure command, the base station 1 does not perform further operations because no other component carriers are available for selection.
Supposing that the subsequent base station 1 decides to switch the UE to the carrier aggregation cell 2 (home base station 2), and sends a switching request message to the base station 2, where the switching request message carries the capability information of the transceiver equipment reported by the UE; the base station 2 responds to the switching request response message to the base station 1, and the switching request response message contains component carrier information configured for the UE; the base station 1 informs the UE of the component carrier information configured for the UE through the switching command, and after the UE receives the component carrier information, if the component carrier information configured for the base station 2 is found to exceed the capability of the UE, the UE can respond to the base station 1 about the switching failure and can also carry the reason that the failure is caused by exceeding the capability range. Meanwhile, the UE ignores the switching command, continues to maintain the configuration before receiving the switching command and does not initiate an RRC reestablishment process.
In the above process, the UE may also process according to the current flow, that is, the UE receives the RRC reconfiguration command, finds that the configuration in the reconfiguration command exceeds the capability range of the UE itself, and executes an RRC reestablishment process, where the reason for initiating the reestablishment is carried in the RRC reestablishment request, and is the reason exceeding the capability range of the UE itself and/or the RRC reconfiguration failure, and if the base station that initiates the RRC reconfiguration is the base station that initiates the RRC reconfiguration, the base station adjusts the component carrier configured for the UE according to the reason.
And if the base station which is reestablished by the RRC is the base station which initiates the switching command, the base station adjusts the component carrier wave configured for the UE according to the reason.
The present embodiment is independent of whether the secondary component carrier has an activated and deactivated state.
Fig. 8 is a diagram illustrating component carrier adjustment according to a fifth embodiment of the present invention, where in fig. 8, a blank indicates an idle frequency band and a small grid shadow indicates a used frequency band. In the fourth embodiment, it is assumed that the UE resides in CC1 in carrier aggregation cell 1, and carrier aggregation cell 1 supports aggregation of three component carriers, which are CC1 (the lower row center frequency is 2120MHz, home band1, and the bandwidth is 20MHz), CC2 (the lower row center frequency is 2140MHz, home band1, and the bandwidth is 20MHz), CC3 (the lower row center frequency is 879MHz, home band5, and the bandwidth is 20MHz), CC4 (the lower row center frequency is 2160MHz, home band1, and the bandwidth is 20MHz), the UE has one transceiver (denoted as R × T × 1), and supports a bandwidth of 40MHz, as shown in fig. 8 (a).
Suppose that, due to the requirement of upper layer service, the UE initiates an RRC connection establishment request (mainly including a random access procedure) on the CC1, after the random access procedure is completed, the UE enters a connected state, where the CC1 is PCC, the serving cell on the CC1 is Pcell, the center frequency point of the first transceiver device is 2120MHz, and the bandwidth is 20MHz, as shown in fig. 8 (b).
Then, the base station requests the UE to report transceiver capability information, where the transceiver capability information reported by the UE includes a supported band list, such as band 1/2/5.
Suppose that the base station needs to configure component carriers due to an increase in traffic flow. And according to the capability information reported by the UE, the base station knows that the frequency band supported by the UE is band 1/2/5. Therefore, the base station decides to configure the CC3 for the UE for carrier aggregation, and sends the carrier aggregation to the UE through an RRC reconfiguration command.
After receiving the RRC reconfiguration command, the UE finds that the capability exceeds its own capability, responds to the base station that the RRC reconfiguration failure occurs, and may carry the failure reason that the failure is beyond the capability range. Meanwhile, the UE ignores the RRC reconfiguration command, continues to maintain the configuration before receiving the reconfiguration command (i.e., performs data communication with the base station through the CC 1), and does not initiate the RRC reestablishment procedure.
In this embodiment, the out-of-capability range means that the transceiver of the UE cannot support a larger bandwidth (in this embodiment, the UE may support 40MHz, and only 20MHz is currently used, so the out-of-capability range in this embodiment is not the reason); or, the transceiver device of the UE cannot support more non-contiguous component carriers (in this embodiment, the UE cannot support non-contiguous component carriers, and therefore cannot support CC3 for aggregation).
In this embodiment, after receiving the RRC reconfiguration failure command, the base station determines to configure the CC2 for the UE to perform carrier aggregation because the CC2 is available for selection, and sends the RRC reconfiguration failure command to the UE again; after receiving the RRC reconfiguration command, the UE adjusts the working center frequency point of the transceiver to be 2130MHz and the bandwidth to be 40MHz according to the frequency points of the CC1 and the CC2, and the adjustment process service is in an interruption state. After the adjustment, the UE performs data communication with the base station through the CC1 and the CC2, as shown in fig. 8 (c).
It is assumed that the base station needs to configure component carriers as traffic flow continues to increase. And according to the capability information of the transceiver equipment reported by the UE, the base station knows that the frequency band supported by the UE is band 1/2/5. Therefore, the base station determines to configure the CC4 for the UE to perform carrier aggregation, and sends the carrier aggregation to the UE through an RRC reconfiguration command; after receiving the RRC reconfiguration command, the UE finds that the capability exceeds its own capability, responds to the base station that the RRC reconfiguration failure occurs, and may carry the failure reason that the failure is beyond the capability range. Meanwhile, the UE ignores the RRC reconfiguration command, continues to maintain the configuration before receiving the reconfiguration command (i.e., performs data communication with the base station through the CC1 and the CC2), and does not initiate the RRC reestablishment procedure.
The out-of-capability range refers to that the transceiver of the UE cannot support a larger bandwidth (in this embodiment, the UE may support 40MHz, and 40MHz is already used currently, so the out-of-capability range refers to the reason that the transceiver of the UE cannot support the larger bandwidth at this time); or, the transceiver equipment of the UE cannot support more non-contiguous component carriers (in this embodiment, the UE can only support contiguous component carriers, and the CC4 is contiguous with the CC2, so this is not the reason here). In this embodiment, after receiving the RRC reconfiguration failure command, the base station does not perform further operations because no other component carriers are available for selection.
The present embodiment is independent of whether the secondary component carrier has an activated and deactivated state.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (7)
1. A method for controlling adjustment of component carriers in carrier aggregation is characterized by comprising the following steps: controlling the adjustment of the component carrier according to the capability of the User Equipment (UE);
the controlling the adjustment of the component carrier comprises:
the base station configures component carriers for the UE through a Radio Resource Control (RRC) reconfiguration command according to the frequency band supported by the UE;
and when the base station configures the component carrier beyond the capability range of the UE, the UE returns the configuration failure to the base station and does not execute the RRC reestablishment process, ignores the RRC reconfiguration command and continues to adopt the configuration before the RRC reconfiguration command.
2. The method of claim 1, wherein when the base station receiving the configuration failure decides to handover the UE to the destination base station, the method further comprises:
the base station which receives the configuration failure sends a switching request message to a target base station, and the switching request message carries the capability information of the receiving and sending equipment reported by the UE; the target base station responds a switching request response message to the base station which fails to be configured, wherein the switching request response message carries component carrier information configured for the UE;
the base station which receives the configuration failure notifies the UE of the component carrier information configured for the UE through a switching command; after receiving the configuration information, the UE responds to the base station which fails to receive the configuration to fail in switching if finding that the component carrier information configured by the target base station exceeds the capability of the UE; meanwhile, the UE ignores the switching command, continues to maintain the configuration before receiving the switching command and does not initiate an RRC reestablishment process.
3. The method according to claim 1 or 2, wherein the UE notifies the base station that the failure reason is out of capability while returning configuration failure or handover failure to the base station.
4. The method of claim 3, further comprising: and the UE ignores the switching command and continues to adopt the configuration before the switching command.
5. The method according to any of claims 1, 2, 4, wherein the adjusting of the component carriers comprises: component carrier addition, component carrier deletion, component carrier replacement, or component carrier activation deactivation.
6. The method of claim 3, wherein the adjustment of the component carriers comprises: component carrier addition, component carrier deletion, component carrier replacement, or component carrier activation deactivation.
7. A device for controlling adjustment of component carriers in carrier aggregation is characterized by at least comprising a control module, a control module and a control module, wherein the control module is used for controlling the adjustment of the component carriers according to the capability of User Equipment (UE);
the device is arranged in User Equipment (UE); the apparatus also includes a second receiving module, wherein,
a second receiving module, configured to receive, from the base station, an RRC reconfiguration message that the base station configures the component carrier for the UE according to the frequency band supported by the UE;
the control module is specifically used for returning configuration failure to the base station when the base station is determined to be configured with the component carrier beyond the capability range of the UE, and simultaneously informing that the failure reason is beyond the capability range; and the RRC reestablishment process is not executed, the RRC reconfiguration command is ignored, and the configuration before the RRC reconfiguration command is continuously adopted.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010236759.1A CN102340873B (en) | 2010-07-22 | 2010-07-22 | In carrier aggregation, the adjustment of component carrier is realized to method and the device of control |
| PCT/CN2011/076075 WO2012010034A1 (en) | 2010-07-22 | 2011-06-21 | Method and device for realizing control on component carrier adjustment in carrier aggregation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010236759.1A CN102340873B (en) | 2010-07-22 | 2010-07-22 | In carrier aggregation, the adjustment of component carrier is realized to method and the device of control |
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| Publication Number | Publication Date |
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| CN102340873A CN102340873A (en) | 2012-02-01 |
| CN102340873B true CN102340873B (en) | 2016-03-30 |
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| CN201010236759.1A Expired - Fee Related CN102340873B (en) | 2010-07-22 | 2010-07-22 | In carrier aggregation, the adjustment of component carrier is realized to method and the device of control |
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| CN103580836B (en) * | 2012-08-03 | 2019-01-04 | 中兴通讯股份有限公司 | UE type reports, resource allocation methods and device, UE, base station |
| CN103634910B (en) * | 2012-08-29 | 2019-03-01 | 中兴通讯股份有限公司 | Delete the method and device of component carrier |
| CN103973358B (en) * | 2013-01-24 | 2019-02-15 | 中兴通讯股份有限公司 | A data transmission method, device and system for combining millimeter wave communication channels |
| CN103973365B (en) * | 2013-01-29 | 2018-12-28 | 中兴通讯股份有限公司 | A kind of switching method of visible light communication equipment and terminal device in access point |
| CN109728890B (en) | 2013-06-27 | 2021-11-19 | 华为技术有限公司 | Carrier switching method, base station and user equipment |
| US9848425B2 (en) * | 2014-10-28 | 2017-12-19 | Intel Corporation | Communication device and method for controlling transceiver chains of a communication device |
| CN105790907A (en) * | 2014-12-23 | 2016-07-20 | 中兴通讯股份有限公司 | Method and device for modifying frequency band, terminal and base station |
| CN113055144B (en) * | 2015-05-15 | 2022-12-06 | 华为技术有限公司 | Communication device and method |
| CN106922025B (en) * | 2015-12-28 | 2019-07-02 | 普天信息技术有限公司 | A kind of carrier management method and device |
| CN114501634A (en) * | 2020-10-26 | 2022-05-13 | 中国移动通信有限公司研究院 | Determination and reporting method of terminal frequency band bandwidth capability, network equipment and terminal |
| CN117560653A (en) * | 2022-08-04 | 2024-02-13 | 维沃移动通信有限公司 | UE capability control method, device, terminal and network side equipment |
| WO2024108924A1 (en) * | 2023-05-11 | 2024-05-30 | Zte Corporation | Methods, devices, and systems for performing cell determination based on ue capability |
| CN119031517A (en) * | 2023-05-26 | 2024-11-26 | 荣耀终端有限公司 | A communication method, a communication device and an electronic device |
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| CN101164351B (en) * | 2006-03-03 | 2011-04-20 | 华为技术有限公司 | User equipment access method in mobile communication system |
| CN101340622B (en) * | 2007-07-06 | 2012-01-11 | 中兴通讯股份有限公司 | Distribution method of multi-carrier reinforced uplink power resource |
| CN101801096B (en) * | 2009-02-10 | 2013-06-05 | 电信科学技术研究院 | Method, system and equipment of random access |
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| WO2012010034A1 (en) | 2012-01-26 |
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