WO2011069378A1 - 多载波系统中分量载波激活去激活的优化方法和系统 - Google Patents

多载波系统中分量载波激活去激活的优化方法和系统 Download PDF

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Publication number
WO2011069378A1
WO2011069378A1 PCT/CN2010/076538 CN2010076538W WO2011069378A1 WO 2011069378 A1 WO2011069378 A1 WO 2011069378A1 CN 2010076538 W CN2010076538 W CN 2010076538W WO 2011069378 A1 WO2011069378 A1 WO 2011069378A1
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WIPO (PCT)
Prior art keywords
timer
base station
deactivation
activation
command
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PCT/CN2010/076538
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English (en)
French (fr)
Inventor
陈思
张健
王冠宙
Original Assignee
中兴通讯股份有限公司
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Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to JP2012542344A priority Critical patent/JP5525061B2/ja
Priority to MX2012006531A priority patent/MX2012006531A/es
Priority to EP10835413.5A priority patent/EP2493240A4/en
Priority to BR112012013550-3A priority patent/BR112012013550B1/pt
Priority to KR1020127014569A priority patent/KR101373304B1/ko
Priority to US13/511,671 priority patent/US20120294213A1/en
Priority to RU2012120621/07A priority patent/RU2515553C2/ru
Publication of WO2011069378A1 publication Critical patent/WO2011069378A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06—Demodulator circuits; Receiver circuits
    • 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—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • 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), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/231—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the layers above the physical layer, e.g. RRC or MAC-CE signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals

Definitions

  • the present invention relates to the field of communications, and in particular, to an optimized method and system for component carrier activation deactivation in a multi-carrier system.
  • LTE-Advanced Long-Term Evolution advanced
  • LTE-A uses a series of new technologies to expand the frequency domain and airspace on the basis of LTE to achieve the purpose of improving spectrum utilization and increasing system capacity.
  • the carrier aggregation technology can aggregate two or more Component Carriers (CCs) to support a wider frequency band, for example, reaching 100 MHz and spectrum aggregation.
  • CCs Component Carriers
  • a User Equipment (UE) can receive or transmit data on one or more component carriers at the same time. It can be configured to aggregate different numbers of component carriers with different bandwidths in the downlink or uplink.
  • Each component carrier corresponds to a Hybrid Automatic Repeat Request (HARQ) entity and a transport channel.
  • Each of the downlink component carriers has a separate Physical Downlink Control Channel (PDCCH) for indicating resource allocation on the component carrier or resource allocation on other component carriers, and is classified into downlink resource allocation or uplink grant.
  • PDCCH Physical Downlink Control Channel
  • For the extended component carrier there may also be no PDCCH, and its resource allocation is indicated by relying on other component carriers with PDCCH.
  • LTE-A carrier aggregation there may be one component carrier serving as a serving cell of the UE, providing synchronization, access, system information, paging, etc.; or multiple component carriers are serving as serving cells of the UE.
  • one serving cell can be set as a primary serving cell, as a preferred reference or a control cell for measurement reference, handover, random access.
  • ⁇ time adjustment timer
  • the UE maintains the same time adjustment timer ( ⁇ ) for these component carriers.
  • Time adjustment timer (TAT) operation indicates that the UE is in uplink synchronization state on these component carriers and the network, and the TAT timeout indicates that these component carriers and the network are in an uplink out-of-synchronization state.
  • TAT time adjustment timer
  • the UE maintains TAT for the corresponding component carriers respectively.
  • the corresponding time adjustment timer (TAT) operation indicates that the UE is in an uplink synchronization state on the component carriers and the network, and the corresponding TAT timeout indicates that the component carriers and the network are in an uplink out-of-synchronization state.
  • the base station may deactivate some CCs.
  • the base station may activate some CCs.
  • the UE receives the command to deactivate the CC, so that the CC enters the deactivated state from the active state; when the UE receives the command to activate the CC, the CC enters the active state from the deactivated state.
  • the CC enters the deactivated state to indicate that the CC no longer receives the scheduling.
  • the CC enters the active state to indicate that the CC re-partitions to the scheduling.
  • DRX discontinuous reception
  • PDCCH Physical Downlink Control
  • MAC media access. Control layer
  • deactivated state is also different from the inactive state in DRX. The former does not actively enter the active state, and the latter actively enters the active state when the timer (on duration timer) is started or restarted.
  • the activation command and the deactivation command can be delivered in the following manner: downlink control information (DCI), MAC control element (MAC CE), RRC message.
  • DCI downlink control information
  • MAC CE MAC control element
  • RRC message MAC control element
  • DCI has the best timeliness, but one of the major drawbacks of DCI is that reliability is relatively poor. If the PDCCH decoding fails, the base station will send data on the CC that it considers to be active, and the UE cannot receive it; or the UE does not have to wait for scheduling.
  • the present invention proposes an optimization method and system for component carrier activation deactivation in a multi-carrier system to improve the activation deactivation reliability of the carrier aggregation technology of the LTE-A system.
  • the present invention provides an optimization method for component carrier activation deactivation in a multi-carrier system, including: When the component carrier (CC) is activated, the base station sends an activation command to the user equipment (UE) through the downlink control information (DCI), indicating that the CC is activated; if the UE successfully receives the activation command, the CC is activated, and Sending, by the base station, a feedback message of the activation command;
  • DCI downlink control information
  • the base station When the CC is deactivated, the base station sends a deactivation command to the UE through the DCI, indicating to deactivate the CC; if the UE successfully receives the deactivation command, deactivates the CC, and sends the deactivation to the base station. Feedback message for the command.
  • the above method may further include:
  • the base station After the base station sends an activation command to the UE, if the feedback message of the activation command is not received at the specified time, the activation command is sent to the UE again;
  • the base station After the base station sends the deactivation command to the UE, if the feedback message of the deactivation command is not received at the specified time, the deactivation command is sent to the UE again.
  • the above method may further include:
  • the base station specifies a CC that transmits a feedback message of the activation command by using an activation command, or system information, or a radio resource control (RRC) message;
  • RRC radio resource control
  • the base station specifies the cc of the feedback message that passes the deactivation command by deactivating the command, or system information, or the RRC message.
  • the present invention also provides an optimization method for component carrier activation deactivation in another multi-carrier system, including:
  • the base station When the CC is activated, the base station sends an activation command to the UE multiple times through the DCI, indicating that the CC is activated; if the UE successfully receives the activation command one or more times, the CC is activated;
  • the base station When the CC is deactivated, the base station sends a deactivation command to the UE multiple times through the DCI to indicate that the CC is deactivated. If the UE successfully receives the deactivation command one or more times, the cc is deactivated.
  • the method may further include: if the UE successfully receives the activation command, sending a feedback message of the activation command to the base station; if the UE successfully receives the deactivation command, sending the feedback message of the deactivation command to the base station.
  • the method may further include: the base station specifying, by using an activation command, or system information, or an RRC message, a CC that delivers a feedback message of the activation command; the base station specifies a feedback message for transmitting the deactivation command by using a deactivation command, or system information, or an RRC message.
  • CC a feedback message for transmitting the deactivation command by using a deactivation command, or system information, or an RRC message.
  • the present invention also provides an optimization method for component carrier deactivation in a multi-carrier system, including:
  • the UE maintains one or more timers
  • the UE When the timer expires or stops, the UE deactivates one or more CCs corresponding to the timer; or, when the timer expires or stops, the UE selects one or more CCs corresponding to the timer
  • the identification information is given to the base station.
  • the above method may further include:
  • the identification information of one or more CCs corresponding to the timer is sent to the base station.
  • the above method may further include:
  • the base station After the UE reports the identification information of one or more CCs to the base station, the base station sends a deactivation command and/or a scheduling command for the CC to the UE according to the received identification information.
  • the above method may also have the following features:
  • the UE uses the medium access control layer (MAC) control element to report the identity information of one or more CCs.
  • MAC medium access control layer
  • the above method may also have the following features:
  • the timer is a time adjustment timer, and the time adjustment timer corresponds to one or more CCs having activation and deactivation functions.
  • the above method may further include:
  • the base station informs the UE of the duration of the activation timer by using a system message or an RRC message.
  • the method may further include: when the timer is an activation timer, the UE stops activating the timer in a stop condition, and the stopping condition may include:
  • the time adjustment timer expires, and the one or more CCs corresponding to the time adjustment timer of the timeout include the cc corresponding to the activation timer.
  • the above method may further include:
  • the UE starts or restarts the activation timer under the condition of starting or restarting, and the starting or restarting condition may include: the UE receives an activation command, indicating that the activation timer is activated. The CC; and/or the UE receives the downlink assignment at the CC corresponding to the activation timer; and/or the UE receives the uplink grant at the CC corresponding to the activation timer; and/or the UE receives the CC corresponding to the activation timer.
  • the condition for starting or restarting the activation timer may further include: receiving, by the UE, a downlink assignment, indicating that the CC corresponding to the activation timer receives data; and/or the UE receiving the uplink grant, indicating that The CC receiving feedback corresponding to the activation timer; in the case of supporting the discontinuous reception (DRX), the condition of starting or restarting the activation timer may further include: starting or restarting the inactivity timer corresponding to the CC corresponding to the activation timer; / The retransmission timer corresponding to any downlink HARQ process of the CC corresponding to the activation timer is started; in the case of supporting random access, the conditions for starting or restarting the activation timer may further include: a random access procedure of the competition In the random access process of the non-contention, the UE waits to receive the downlink assignment or the uplink grant indicating the first transmission after the random access is successful.
  • the above method may further include:
  • the UE starts or restarts the deactivation timer under the condition of starting or restarting, and the starting or restarting condition may include: the CC downlink transmission corresponding to the deactivation timer is successfully received; And/or the CC uplink transmission corresponding to the deactivation timer is successfully transmitted.
  • the condition of the UE starting or restarting the deactivation timer may further include: the inactivity timer corresponding to the CC corresponding to the deactivation timer expires; and/or deactivating all downlink HARQ processes of the CC corresponding to the timer.
  • the retransmission timer expired.
  • the above method may further include:
  • the UE stops the deactivation timer in a stop condition, where the stopping condition may include: the UE receives the downlink assignment in the CC corresponding to the deactivation timer; and/or the UE The CC corresponding to the deactivation timer receives the uplink grant; and/or fails to transmit the CC uplink transmission corresponding to the deactivation timer; and/or fails the CC downlink transmission corresponding to the deactivation timer.
  • the condition that the UE stops the deactivation timer may further include: receiving, by the UE, a downlink assignment, indicating that the CC corresponding to the deactivation timer receives data; and/or the UE receiving the uplink grant, indicating The CC corresponding to the deactivation timer receives feedback.
  • the present invention also provides an optimization method for component carrier activation deactivation in a multi-carrier system, including: The UE reports the status of the CC to the base station;
  • the base station determines, according to the status of the received CC, whether it is consistent with the state of the CC saved by itself, and if not, sends an activation command and/or a deactivation command to the UE.
  • the UE may report the status of the CC to the base station in the manner of a MAC control element.
  • the MAC control element may carry the identification information of the CC in the active state, and/or the identification information of the CC in the deactivated state, or the MAC control element may carry a bitmap, the bitmap indicates the CC in the active state and/or is deactivated. The status of the CC.
  • the UE may report the status of the CC to the base station under the following conditions: periodic reporting; and/or the UE receives the activation command or the deactivation command; and/or the UE receives the MAC control element sent by the base station, and requests the UE to report The state of the CC; and/or the padding bits of the uplink grant are sufficient to fill the MAC control element and its MAC subheader; wherein, the priority of the MAC control element transmitting the CC state with the unfilled bit may be lower than the priority of the transmitting cell radio network
  • the MAC control element of the identifier may be lower than the data from the uplink common control channel (UL-CCCH), and may be higher than the MAC control element using the unfilled bit transfer buffer status report (BSR);
  • the MAC control element that passes the CC state with padding bits may have a lower priority than the data from the logical channel, and may be lower than the MAC control element that delivers the BSR with the padding bits.
  • the periodic reporting may be: reporting when the periodic timer expires; the periodic timer may be started or restarted each time the reporting is performed; the method may further include: the base station notifying the UE of the duration of the periodic timer by using a system message or an RRC message.
  • the present invention also provides an optimization system for component carrier activation deactivation in a multi-carrier system, including a base station and a UE, the base station configured to: send an activation command to the UE through the DCI, instruct to activate the CC; and send a deactivation command through the DCI. Giving the UE, instructing to deactivate the CC;
  • the UE is configured to: if the activation command is successfully received, activate the CC, and send a feedback message of the activation command to the base station; if the deactivation command is successfully received, deactivate the CC, and sending a feedback message of the deactivation command to the base station.
  • the present invention further provides an optimization system for component carrier activation deactivation in another multi-carrier system, including a base station and a UE, the base station being configured to: continuously send an activation command to the UE multiple times through the DCI, indicating activation of the CC; and, by DCI Sending a deactivation command to the UE multiple times in succession, indicating to deactivate the CC;
  • the UE is configured to: if the activation command is successfully received one or more times, activate the
  • the present invention also provides an optimized system for component carrier activation deactivation in a multi-carrier system, including a base station and a UE, the UE being configured to: maintain one or more timers, when the timer expires or stops, the UE For deactivating one or more CCs corresponding to the timer; or, when the timer expires or stops, reporting the identification information of one or more CCs corresponding to the timer to the base station;
  • the base station is configured to send a deactivation command and/or a scheduling command for the CC to the UE according to the received identification information.
  • the present invention also provides an optimization system for component carrier activation deactivation in a multi-carrier system, including a base station and a UE, where the UE is configured to report the status of the CC to the base station;
  • the base station is configured to determine whether it is consistent with the state of the CC saved by itself according to the received CC state, and if not, send an activation command and/or a deactivation command to the UE.
  • the invention can improve the activation deactivation reliability of the carrier aggregation technology of the LTE-A system, and has the advantages of simple configuration and operation, and ensuring a consistent CC state between the base station and the UE.
  • Figure 1 shows a state transition diagram of activation deactivation
  • FIG. 2 is a schematic diagram of sending an activation command according to UE feedback according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram showing a continuous transmission activation command according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of sending a deactivation command according to UE feedback according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram showing a continuous transmission deactivation command according to an embodiment of the present invention.
  • an activation deactivation reliability scheme of the carrier aggregation technology of the LTE-A system including:
  • Method 1 (Applicable to activation deactivation)
  • the method of using DCI includes two implementation methods:
  • the base station When the CC is activated, the base station sends an activation command to the UE through the DCI, indicating that the CC is activated; if the UE successfully receives the activation command, the CC is activated, and a feedback message of successful reception is sent to the base station;
  • the base station When the CC is deactivated, the base station sends a deactivation command to the UE through the DCI, indicating to deactivate the CC; if the UE successfully receives the deactivation command, deactivates the CC, and sends a successful reception to the base station. Feedback message.
  • the base station When the CC is activated, the base station sends an activation command to the UE multiple times through the DCI, indicating that the activation is performed.
  • CC if the UE successfully receives one or more of the multiple activation commands, activate the CC;
  • the base station When the CC is deactivated, the base station sends a deactivation command to the UE multiple times through the DCI to indicate that the CC is deactivated. If the UE successfully receives one or more times of the multiple deactivation commands, the base station is deactivated. Said CC.
  • the activation and/or deactivation command may activate and/or deactivate one or more CCs, and activate identification information of one or more CCs that need to be activated in the activation command; when the deactivation command is not transmitted on the deactivated CC, it needs to be included The identification information of one or more CCs that are deactivated.
  • the method of using the timer specifically includes:
  • the UE maintains one or more timers
  • the UE When the timer expires or stops, the UE deactivates one or more CCs corresponding to the timer; or, when the timer expires or stops, the UE selects one or more CCs corresponding to the timer
  • the identification information is given to the base station.
  • the base station sends a deactivation command and/or a scheduling command for the CC to the UE according to the identification information.
  • Method three (for activation deactivation)
  • the method of reporting the CC status includes:
  • the UE reports the status of the CC to the base station
  • the base station determines whether it is consistent with the state of the CC saved by itself according to the received CC state. If not, sends an activation command and/or a deactivation command to the UE.
  • the base station sends an activation command one or more times.
  • the activation command may be sent according to feedback of the UE (as shown in FIG. 2), that is, from the perspective of the base station, the base station waits to receive the feedback message of the UE after sending the activation command, if at a specified time (refer to a pre-agreed The time interval between the time when the activation command is sent and the time when the feedback message is received, the time indicated by the time when the activation command is sent and the time interval, for example, 4 ms after the activation command is sent) the base station does not receive the feedback message, then the base station Resend the activation command. From the perspective of the UE, the UE detects the C-RNTI (Cell Radio Network Temporary Identifier) on the PDCCH. If the activation command is detected, the UE considers that the reception is successful, activates the CC indicated by the activation command, and A successful feedback message is sent to the base station at a specified time (eg, 4 ms after receiving the activation command).
  • the activation command may also be sent according to the feedback of the UE (as shown in FIG. 3), that is, from the perspective of the base station, the base station sends an activation command multiple times in succession to ensure successful UE reception.
  • the UE detects the C-RNTI on the PDCCH of the CC without the activation and deactivation function. If the activation command is detected, the UE considers that the reception is successful, and activates the CC indicated by the activation command.
  • the UE detects that any one is considered to be successful.
  • the UE optionally sends a feedback message. After the UE detects the activation command, it also ignores if it activates the activation command to activate the same CC.
  • the base station passes the DCI (such as indicating on which CC the feedback message is transmitted in the activation command), or the system message (such as specifying a fixed pairing relationship between the activated CC and the feedback successful CC in the system message, or specifying the reception in the system message) Activate the command's CC and feedback to activate the successful CC Fixed pairing relationship), or RRC message (such as specifying a fixed pairing relationship between the activated CC and the CC that successfully activated the feedback in the RRC message, or specifying the CC that receives the activation command and the fixed pairing of the CC that successfully activated the feedback in the RRC message. Relationship) specifies the cc of the feedback message that passed the activation command.
  • the pairing relationship can be indicated by the system information and the RRC message.
  • the activation command may use the newly introduced DCI format, or the existing DCI format, and some of the fields use a fixed value. For example: Activate the downlink CC to use the existing format DCI format 1, where the fields “resource block assignment”, “HARQ process number”, “new data indicator”, , “ redundancy version ( redundancy version ) " , “ PUCCH transmission power control command ( TPC command for PUCCH ) " can all be all 0, "modulation and coding scheme” highest value 0.
  • the activation command carries identification information of one or more CCs for activating the one or more CCs.
  • the base station uses the DCI to send an activation command to instruct the UE to activate the CC. If the UE does not detect the DCI, the base station may consider that the CC is in an active state, and the UE considers that the CC is in the deactivated state. The base station schedules the UE to transmit data on the CC, but the UE cannot transmit data on the CC in the deactivated state, so the part of the resources allocated by the base station is wasted.
  • the UE reports the status of the CC to the base station, and the base station determines whether it is consistent with the state of the CC saved by itself according to the received CC status. If not, sends an activation command to the UE, And indicating that the state of the CC that the UE considers is consistent with the state of the CC that the base station considers.
  • the UE sends the status of the CC to the base station in a manner of a MAC control element.
  • the MAC control element carries the identification information of the CC in an activated state, and/or the identification information of the CC in the deactivated state, or the MAC control element carries a bitmap, where the bitmap indicates the CC and/or in the activated state. Or a CC that is in a deactivated state.
  • the base station can know which CCs have been activated for the UE and which CCs have been deactivated.
  • the condition that the UE reports the status of the CC to the base station includes at least one of the following:
  • the UE receives the MAC control element sent by the base station, and requests the UE to report the status of the CC;
  • the padding bits of the upstream grant are sufficient to fill the MAC Control Element and its MAC subheader.
  • the periodic reporting refers to: the periodic timer is reported to be timed out; the periodic timer is started or restarted each time the reporting is performed, and the base station performs the system message (such as: SIB2) or an RRC message (such as: RRC connection reconfiguration message).
  • SIB2 system message
  • RRC message such as: RRC connection reconfiguration message
  • the UE can actively report the status information of the CC. For example, the UE maintains a timer (period timer), and reports the current CC status when the timer expires. In addition, if the uplink resources are sufficient, the UE can also report the current CC status. The UE can also passively report the status information of the CC. For example, the base station sends a message (such as a MAC control element) on any CC that is in an active state, and requests the UE to report the status information of the CC. When the UE receives the message, it reports the status information of the CC. In addition, the activation command may also trigger the UE to report the status information of the CC as feedback of the activation command.
  • a message such as a MAC control element
  • the MAC control element of the CC state (ie, the first to third of the conditions for reporting the status of the CC to the base station by the UE) is lower than the MAC control element transmitting the C-RNTI, which is lower than
  • the uplink common control channel (UL-CCCH) data is higher than the MAC control element of the unfilled bit transfer buffer status report (BSR);
  • the MAC control element that uses the padding bit to convey the CC state has lower priority than the data from the logical channel, and is lower than the BSR that uses the padding bit to transmit the BSR.
  • MAC control element Example of deactivating cc:
  • the base station sends a deactivation command one or more times.
  • Mode A The deactivation command may be sent according to feedback of the UE (as shown in FIG. 4), that is, from the perspective of the base station, after the base station sends the deactivation command, the base station waits to receive the feedback message of the UE, if at the specified time (refer to the pre- The time interval between the time when the deactivation command is sent and the time when the feedback message is received, the time indicated by the time when the deactivation command is sent and the time interval, for example, 4 ms after the deactivation command is sent) the base station receives the feedback message Then, the base station considers that the deactivation is successful.
  • the base station If the base station does not receive the feedback message, the base station resends the deactivation command or the base station does not send the deactivation command. From the perspective of the UE, the UE detects the C-RNTI on the PDCCH. If the deactivation command is detected, the UE considers that the reception is successful, deactivates the CC indicated by the deactivation command, and at the specified time (such as receiving the deactivation command). After 4ms, a feedback message of successful reception is sent to the base station.
  • the deactivation command may also be sent according to the feedback of the UE (as shown in FIG. 5), that is, from the perspective of the base station, the base station continuously sends a deactivation command multiple times to ensure that the UE receives the success. From the perspective of the UE, the UE detects the C-RNTI on the PDCCH. If the deactivation command is detected, the UE considers that the reception is successful, and deactivates the CC indicated by the deactivation command. In the multiple deactivation commands sent by the base station, the UE detects that any one is considered to be successful. The UE optionally sends a feedback message. After the UE detects the deactivation command, it also ignores if it also detects that the deactivation command of the same CC is deactivated.
  • the base station passes the DCI (such as in which CC the feedback message is indicated in the deactivation command), or the system message (such as the CC in the system message that specifies the CC that receives the deactivation command and the feedback to deactivate the fixed pairing of the successful CC), or
  • the RRC message (as defined in the RRC message, the CC that receives the deactivation command and the fixed pairing relationship of the CC that successfully activates the feedback) specifies the CC that passes the feedback message of the deactivation command.
  • the deactivation command may use the newly introduced DCI format or the existing DCI format.
  • the existing format DCI format 1 where the fields “resource block assignment”, “HARQ process number”, “new”
  • the deactivation command is passed by the CC indicated by the deactivation command and only one CC is deactivated
  • the identification information of the CC may not be carried. If the deactivation command does not pass the indicated CC, or the deactivation command deactivates multiple CCs, the deactivation command carries identification information of one or more CCs for deactivating one or more ccs.
  • the UE maintains one or more timers; when the timer expires or stops, the UE deactivates one or more CCs corresponding to the timer; or, when the timer expires or stops, the UE reports the timer
  • the identification information of the corresponding one or more CCs is sent to the base station.
  • the UE sends a message to the base station, and informs the base station of the identifier information of the deactivated one or more CCs.
  • the base station receives a message carrying identifier information of one or more CCs, and sends a deactivation command and/or a scheduling command for the CC to the UE according to the identifier information.
  • the message is in the format of a MAC control element.
  • the timer can be a time adjustment timer (TAT), an activation timer, or a deactivation timer.
  • TAT time adjustment timer
  • activation timer activation timer
  • deactivation timer deactivation timer
  • the time adjustment timer corresponds to one or more CCs having activation and deactivation functions.
  • the UE deactivates all CCs with activation and deactivation functions; and optionally
  • the CC of the active and deactivated functions (such as providing a random access function) performs random access to recover the uplink synchronization, and reports the identification information of the deactivated CC to the base station.
  • the UE deactivates one or more CCs with activation and deactivation functions corresponding to the time adjustment timer;
  • the CC of the activated or deactivated function or the CC in the activated state reports the identification information of the deactivated CC to the base station.
  • the activation timer corresponds to a CC, and the CC has an activation and deactivation function.
  • the CC corresponding to the deactivation timer does not include: a serving cell serving as the UE; a primary serving cell as the UE; a special cell serving as a UE; Anchor CC; CC providing synchronization, and/or access, and/or system information and/or paging functions; preferred CC as a measurement reference, and/or handover, and/or random access; Cc of security input parameters and/or information for non-access stratum mobility management.
  • the UE deactivates the CC corresponding to the activation timer, and optionally reports the identification information of the CC to the base station; or the UE reports the identification information of the CC to the base station, and waits for further command processing by the base station. If the base station sends a deactivation command, the UE deactivates the CC according to the deactivation command. If the UE reports on the CC, the identifier information may not be carried.
  • the base station informs the UE of the duration of the activation timer by using a system message (e.g., SIB2) or an RRC message (e.g., an RRC connection reconfiguration message).
  • SIB2 system message
  • RRC message e.g., an RRC connection reconfiguration message
  • the condition that the UE stops the activation timer includes at least one of the following: receiving a deactivation command, the deactivation command instructing to deactivate a CC corresponding to the activation timer, where the deactivation command is explicit, The DCI or the MAC control element or the RRC message; or, the time adjustment timer is timed out (ie, the uplink is out of synchronization), and the one or more CCs corresponding to the time adjustment timer of the timeout include the CC corresponding to the activation timer.
  • the condition that the UE starts or restarts the activation timer includes at least one of the following:
  • the UE receives an activation command, indicating that the CC corresponding to the activation timer is activated; the activation command is explicit or implicit, and the activation command is a DCI or a MAC control element or an RRC message; 2) The UE receives a downlink assignment indicating a first transmission or a retransmission in the CC corresponding to the activation timer, and indicates that the CC corresponding to the activation timer receives data;
  • the UE receives an uplink grant indicating a first transmission or a retransmission in the CC corresponding to the activation timer;
  • the UE receives a feedback message (NACK) indicating that the uplink data fails to be sent in the CC corresponding to the activation timer;
  • NACK feedback message
  • the UE is to send uplink data, and the CC corresponding to the activation timer is waiting to receive the uplink authorization.
  • condition that the UE starts or restarts the activation timer further includes at least one of the following:
  • the UE receives a downlink assignment (including indicating a first transmission or a retransmission), and indicates that the CC corresponding to the activation timer receives data.
  • the downlink assignment may be received on the CC corresponding to the activation timer, or may be received on other CCs.
  • the UE receives an uplink grant (including indicating a first transmission or a retransmission), and indicates that the CC corresponding to the activation timer receives feedback.
  • the downlink assignment may be received on the CC corresponding to the activation timer, or may be received on other CCs.
  • the indication receiving feedback refers to: the uplink authorization carries the identification information of the CC corresponding to the activation timer, indicating the feedback in the CC; or the uplink authorization indication sends the uplink data CC, in the system message or In the RRC message, the CC corresponding to the activation timer is used to feed back uplink data sent on the CC indicated by the uplink grant.
  • condition that the UE starts or restarts the activation timer further includes at least one of the following:
  • the condition that the UE starts or restarts the activation timer further includes at least one of the following: 1) During the random access process of the competition, the competition resolution timer (mac-ContentionResolutionTimer) is started or restarted;
  • the UE In the non-contention random access procedure, after the random access is successful, the UE waits to receive the downlink assignment or the uplink grant indicating the first transmission.
  • the timer is stopped even if the above conditions for starting or restarting the timer are met.
  • the "start” timer means: The timer was previously stopped, and the "restart” timer means: The timer was previously running.
  • the deactivation timer corresponds to one CC, and the CC has an activation and deactivation function.
  • the CC corresponding to the deactivation timer does not include: a serving cell serving as the UE; a primary serving cell serving as the UE; a special cell serving as a UE; Anchor CC; CC providing synchronization, and/or access, and/or system information and/or paging functions; preferred CC as a measurement reference, and/or handover, and/or random access; CC for secure input parameters and/or information for non-access stratum mobility management.
  • the UE deactivates the corresponding CC; that is, within the duration specified by the deactivation timer, there is no data transmission on the one or more CCs with the activation deactivation function corresponding to the deactivation timer (the following line)
  • the example of the CC is that the UE does not receive the downlink control information, the downlink data, and the downlink feedback message, and the UE deactivates the CC, and optionally reports the identification information of the CC to the base station; or the UE reports to the base station.
  • the identification information of the CC is awaiting further command processing by the base station. If the base station sends a deactivation command, the UE deactivates the CC according to the deactivation command. If the UE reports on the CC, the identifier information may not be carried.
  • the base station informs the UE of the duration of the deactivation timer by using a system message (e.g., SIB2) or an RRC message (e.g., an RRC connection reconfiguration message).
  • SIB2 system message
  • RRC message e.g., an RRC connection reconfiguration message
  • the condition that the UE starts or restarts the deactivation timer includes at least one of the following:
  • the conditions for the UE to start or restart the deactivation timer include at least one of the following:
  • the condition that the UE stops the deactivation timer includes at least one of the following:
  • the UE receives an uplink grant in a CC corresponding to the deactivation timer
  • the UE receives a downlink assignment in a CC corresponding to the deactivation timer
  • condition that the UE stops de-energizing the timer further includes at least one of the following:
  • the UE receives a downlink assignment (including indicating a first transmission or a retransmission), and indicates that the CC corresponding to the deactivation timer receives data.
  • the downlink assignment may be received on the CC corresponding to the deactivation timer, or may be received on other CCs.
  • the UE receives an uplink grant (including indicating a first transmission or a retransmission), and indicates that the CC corresponding to the deactivation timer receives feedback.
  • the downlink assignment may be received on the CC corresponding to the deactivation timer, or may be received on other CCs.
  • the indication receiving feedback refers to: the uplink authorization carries the identification information of the CC corresponding to the deactivation timer, indicating the feedback in the CC; or the uplink authorization indication sends the CC of the uplink data, in the system message Or indicating, in the RRC message, the CC corresponding to the deactivation timer is used to feed back uplink data sent on the CC indicated by the uplink grant.
  • Application method three Similar to the process of activating CC.
  • the base station sends a deactivation command to instruct the UE to deactivate the CC. If the UE does not detect the deactivation command, the base station may consider that the CC is in a deactivated state, and the UE considers that the CC is in an active state. The base station does not schedule the UE, and the UE is waiting for the scheduling of the base station, causing the UE to consume power.
  • the UE reports the status of the CC to the base station, and the base station receives the received
  • the UE sends the status of the CC to the base station in a manner of a MAC control element.
  • the MAC control element carries the identification information of the CC in an activated state, and/or the identification information of the CC in the deactivated state, or the MAC control element carries a bitmap, where the bitmap indicates the CC and/or in the activated state. Or a CC that is in a deactivated state.
  • the base station can know which CCs have been activated for the UE and which CCs have been deactivated.
  • the condition that the UE reports the status of the CC to the base station includes at least one of the following:
  • the UE receives the MAC control element sent by the base station, and requests the UE to report the status of the CC;
  • the padding bits of the upstream grant are sufficient to fill the MAC Control Element and its MAC subheader.
  • the periodic reporting refers to: the periodic timer is reported to be timed out; the periodic timer is started or restarted each time the reporting is performed, and the base station performs the system message (such as: SIB2) or an RRC message (such as: RRC connection reconfiguration message).
  • SIB2 system message
  • RRC message such as: RRC connection reconfiguration message
  • the UE can actively report the status information of the CC. For example, the UE maintains a timer (period timer), and reports the current CC status when the timer expires. In addition, if the uplink resources are sufficient, the UE may also report the current CC status.
  • the UE can also passively report the status information of the CC. For example, the base station sends a message (such as a MAC control element) on any CC that is in an active state, and requests the UE to report the status information of the CC. After receiving the message, the UE reports the status information of the CC.
  • the deactivation command can also trigger the UE to report the status information of the CC, as this de-excitation Feedback from live commands.
  • the MAC control element that passes the CC state with unfilled bits has a lower priority than the MAC control element that passes the C-RNTI, lower than the data from the uplink common control channel (UL-CCCH), which is higher than the unfilled bit transfer.
  • MAC control element of the rush zone status report (BSR) BSR
  • the MAC control element that uses the padding bit to pass the CC state has a lower priority than the data from the logical channel, and is lower than the MAC control element that passes the BSR with the padding bit.
  • the identifier information refers to a frequency of a CC, and/or an index of a CC, and/or a PCI (Physical Cell Identifier), and/or an ECGI (E-UTRAN Cell Global Identifier). Incoming network community global identity).
  • PCI Physical Cell Identifier
  • ECGI E-UTRAN Cell Global Identifier
  • the CC is activated and/or deactivated, and the CC paired with it is activated and/or deactivated accordingly, or maintained.
  • the CC without the activation and deactivation functions satisfies at least one of the following:
  • serving cell of the UE serving as the primary serving cell of the UE; acting as a special cell of the UE; acting as an anchor CC; providing synchronization, and/or CC for access, and/or system information and/or paging functions; preferred CC as a measurement reference, and/or handover, and/or random access; providing secure input parameters and/or NAS (Non-Access Stadium , non-access layer) CC for mobility management information.
  • NAS Non-Access Stadium , non-access layer
  • An optimization system for component carrier activation deactivation in a multi-carrier system includes a base station and a UE, where the base station is configured to: send an activation command to the UE by using a DCI, instruct to activate the CC; and send a deactivation command through the DCI.
  • UE indicating to deactivate the CC;
  • the UE is configured to: if the activation command is successfully received, activate the CC, and send a feedback message of receiving success to the base station; if the deactivation command is successfully received, deactivate the CC, And sending a feedback message of successful reception to the base station.
  • An optimization system for a component carrier activation deactivation in a multi-carrier system includes a base station and a UE, where the base station is configured to: continuously send an activation command to the UE by using a DCI multiple times, indicating that the CC is activated; and, continuously, through the DCI Transmitting a deactivation command to the UE, instructing to deactivate the CC; the UE is configured to: if one or more of the multiple activation commands are successfully received, Activating the CC; deactivating the cc if one or more of the multiple deactivation commands are successfully received.
  • An optimization system for a component carrier activation deactivation in a multi-carrier system includes a base station and a UE, where the UE is configured to: maintain one or more timers, and when the timer expires or stops, the UE uses Deactivating one or more CCs corresponding to the timer; or, when the timer expires or stops, the identification information of one or more CCs corresponding to the timer is given to the base station;
  • the base station is configured to send a deactivation command and/or a scheduling command for the CC to the UE according to the received identification information.
  • An optimized system for component carrier activation deactivation in a multi-carrier system including a base station and a UE,
  • the UE is configured to report the status of the CC to the base station;
  • the base station is configured to: determine, according to the received CC state, whether it is consistent with the state of the CC saved by itself, and if not, send an activation command and/or a deactivation command to the UE.
  • the present invention proposes an active deactivation reliability scheme in carrier aggregation of the LTE-A system, which has the advantages of simple configuration and operation, and ensuring a consistent CC state between the base station and the UE.
  • the present invention can improve the activation and deactivation reliability of the LTE-A system carrier aggregation technology, and has the advantages of simple configuration and operation, and ensuring consistent CC status between the base station and the UE.

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Abstract

本发明提供一种多载波系统中分量载波激活去激活的优化方法和系统，该方法包括：激活CC时，基站通过DCI发送激活命令给UE，指示激活CC；若所述UE成功接收到所述激活命令，则激活所述CC，并向所述基站发送所述激活命令的反馈消息；去激活CC时，基站通过DCI发送去激活命令给UE，指示去激活CC；若所述UE成功接收到所述去激活命令，则去激活所述CC，并向所述基站发送所述去激活命令的反馈消息。本发明能够提高LTE-A系统载波聚合技术的激活和去激活可靠性，具有配置与操作简单、保证基站与UE之间的CC状态一致等优点。

Description

多载波系统中分量载波激活去激活的优化方法和系统
技术领域
本发明涉及通信领域， 尤其涉及一种多载波系统中分量载波激活去激活 的优化方法和系统。
背景技术
为了满足日益增长的大带宽高速移动接入的需求， 第三代伙伴组织计划 ( Third Generation Partnership Projects , 简称 3GPP ) 推出高级长期演进 ( Long-Term Evolution advanced, 简称 LTE- Advanced或者 LTE-A )标准。 LTE-A在 LTE基础上釆用一系列新技术对频域、 空域进行扩充， 以达到提高 频谱利用率、 增加系统容量等目的。 其中载波聚合技术可以聚合两个或多个 分量载波（Component Carrier, 简称 CC ) 以支持更宽的频带， 例如， 到达 100MHz和频谱聚合。 用户设备 ( User Equipment , 简称 UE ) 可以同时在 1 个或多个分量载波上接收或发送数据， 可以配置在下行或上行聚集不同个数 具有不同带宽的分量载波。 每个分量载波对应一个混合自动重传 （Hybrid Automatic Repeat Request , HARQ ) 实体和传输信道。 在每个下行分量载波 上分别有一个单独的物理下行控制信道 ( Physical Downlink Control Channel , 简称 PDCCH )指示本分量载波上的资源分配或其它分量载波上的资源分配， 分为下行资源分配或上行授权的情况， PDCCH上有 0~3bit指示分量载波标识 信息。 对于扩展分量载波， 也可能没有 PDCCH, 其资源分配而依赖于其它有 PDCCH的分量载波进行指示。 在 LTE-A载波聚合中， 可能存在一个分量载 波作为 UE的服务小区（ Serving cell ) , 提供同步、 接入、 系统信息、 寻呼等 功能； 或者多个分量载波均作为 UE的服务小区， 提供上述功能， 其中 1个 服务小区可以设置为主服务小区 （ Primary serving cell ) , 作为测量参考、 切 换、 随机接入时的首选或者主控小区。 对于全部或多个上行分量载波， 可能 具有相同的时间调整（ ΤΑ )量或者不同的时间调整量。 对于 ΤΑ相同的情况， UE 为这些分量载波维护同一个时间调整定时器 （ΤΑΤ ) 。 时间调整定时器 ( TAT )运行说明 UE在这些分量载波和网络处于上行同步状态， TAT超时 说明这些分量载波和网络处于上行失步状态。 对于 TA不同的情况， UE为相 应的分量载波分别维护 TAT。 对应的时间调整定时器（TAT )运行说明 UE 在这些分量载波和网络处于上行同步状态，对应的 TAT超时说明这些分量载 波和网络处于上行失步状态。
当 UE的业务对带宽的需求降低时，基站可以去激活一些 CC,反之， 当 UE的业务对带宽的需求增加时， 基站可以激活一些 CC。 如图 1 所示， UE 收到去激活 CC的命令， 则使得 CC由激活状态进入去激活状态； UE收到激 活 CC的命令， 则使得 CC由去激活状态进入激活状态。 CC进入去激活状态 表示 CC不再接收调度， CC进入激活状态表示 CC重新参与调度， 对于配置 了非连续接收（ DRX ) 的 CC, 意味着 CC重新进入 DRX状态， 对于没有配 置 DRX的 CC, 意味着 CC进入激活状态一直监听 PDCCH。 去激活 CC与删 除 CC的概念不一样， 虽然 CC都不再用于调度， 但是前者保留 CC的无线资 源控制（ Radio Resources Control,简称为 RRC )配置信息（如物理层（ PHY )、 媒体接入控制层（ MAC )等相关参数 ) , 后者删除 CC的 RRC配置信息。 去 激活状态与 DRX中的非激活状态也有所不同， 前者不会主动进入激活状态， 后者当定时器（on duration timer )启动或重启时会主动进入激活状态。
目前， 激活命令、 去激活命令可以釆用以下方式传递： 下行控制信息 ( DCI ) 、 MAC控制元（MAC CE ) 、 RRC消息。 其中， DCI的时效性最好， 但是 DCI的一大缺点是可靠性相比较差。 如果 PDCCH解码失败， 那么就会 造成基站在自己以为激活的 CC上发送数据， 而 UE无法收到； 或者 UE没必 要等待调度。
发明内容
本发明提出一种多载波系统中分量载波激活去激活的优化方法和系统， 以提高 LTE-A系统载波聚合技术的激活去激活可靠性。
为了解决上述技术问题， 本发明提供一种多载波系统中分量载波激活去 激活的优化方法， 包括： 激活分量载波（CC ) 时， 基站通过下行控制信息 （DCI )发送激活命令 给用户设备 ( UE ) , 指示激活 CC; 若所述 UE成功接收到所述激活命令， 则激活所述 CC, 并向所述基站发送所述激活命令的反馈消息；
去激活 CC时， 基站通过 DCI发送去激活命令给 UE, 指示去激活 CC; 若所述 UE成功接收到所述去激活命令， 则去激活所述 CC, 并向所述基站发 送所述去激活命令的反馈消息。
上述方法还可包括：
基站发送激活命令给 UE后， 若在指定的时刻没有接收到激活命令的反 馈消息， 则再次发送激活命令给 UE;
基站发送去激活命令给 UE后， 若在指定的时刻没有接收到去激活命令 的反馈消息， 则再次发送去激活命令给 UE。
上述方法还可包括：
基站通过激活命令， 或者系统信息， 或者无线资源控制 （RRC ) 消息指 定传递激活命令的反馈消息的 CC;
基站通过去激活命令， 或者系统信息， 或者 RRC消息指定传递去激活命 令的反馈消息的 cc。
本发明还提供另一种多载波系统中分量载波激活去激活的优化方法， 包 括：
激活 CC时，基站通过 DCI连续多次发送激活命令给 UE,指示激活 CC; 若所述 UE—次或多次成功接收到所述激活命令， 则激活所述 CC;
去激活 CC时，基站通过 DCI连续多次发送去激活命令给 UE,指示去激 活 CC; 若所述 UE—次或多次成功接收到所述去激活命令， 则去激活所述 cc。
上述方法还可包括： 若 UE成功接收到激活命令， 向基站发送该激活命 令的反馈消息； 若 UE成功接收到去激活命令， 向基站发送该去激活命令的 反馈消息。 该方法还可包括： 基站通过激活命令， 或者系统信息， 或者 RRC 消息指定传递激活命令的反馈消息的 CC;基站通过去激活命令， 或者系统信 息， 或者 RRC消息指定传递去激活命令的反馈消息的 CC。 本发明还提供一种多载波系统中分量载波去激活的优化方法， 包括：
UE维护一个或多个定时器；
当所述定时器超时或停止， UE去激活所述定时器对应的一个或多个 CC; 或者， 当所述定时器超时或停止， UE上 >¾所述定时器对应的一个或多个 CC 的标识信息给基站。
上述方法还可包括：
UE去激活定时器对应的一个或多个 CC后，上 "^该定时器对应的一个或 多个 CC的标识信息给基站。
上述方法还可包括：
UE上报一个或多个 CC的标识信息给基站后，基站根据接收到的标识信 息向 UE发送针对 CC的去激活命令和 /或调度命令。
上述方法还可具有以下特点： UE上报一个或多个 CC的标识信息时， 釆 用媒体接入控制层（MAC )控制元的格式上报一个或多个 CC的标识信息。
上述方法还可具有以下特点： 定时器为时间调整定时器， 时间调整定时 器对应一个或多个具有激活和去激活功能的 CC。
上述方法还可包括：
当定时器为激活定时器时，基站通过系统消息或 RRC消息将激活定时器 的时长告知 UE。
上述方法还可包括： 当定时器为激活定时器时， UE在停止条件下停止激 活定时器， 该停止条件可包括：
所述 UE接收到去激活命令， 去激活命令指示去激活激活定时器对应的 CC; 和 /或
时间调整定时器超时， 超时的时间调整定时器对应的一个或多个 CC 包 括激活定时器对应的 cc。
上述方法还可包括：
当定时器为激活定时器时，UE在启动或重启条件下启动或重启激活定时 器， 该启动或重启条件可包括： UE接收到激活命令， 指示激活激活定时器对 应的 CC; 和 /或 UE在激活定时器对应的 CC接收到下行指配； 和 /或 UE在激 活定时器对应的 CC接收到上行授权； 和 /或 UE在激活定时器对应的 CC接 收到指示发送上行数据失败的反馈消息； 和 /或 UE待发送上行数据， 在激活 定时器对应的 CC等待接收上行授权。 在支持跨载波调度的情况下， 启动或 重启激活定时器的条件还可包括： UE接收到下行指配，指示在激活定时器对 应的 CC接收数据； 和 /或 UE接收到上行授权， 指示在激活定时器对应的 CC 接收反馈； 在支持非连续接收（DRX ) 的情况下， 启动或重启激活定时器的 条件还可包括： 激活定时器对应的 CC对应的非活动定时器启动或重启； 和 / 或激活定时器对应的 CC的任一下行 HARQ进程对应的重传定时器启动； 在 支持随机接入的情况下， 启动或重启激活定时器的条件还可包括： 竟争的随 机接入过程中，竟争解决定时器启动或重启；和 /或非竟争的随机接入过程中， 随机接入成功之后， UE等待接收指示首传的下行指配或者上行授权。
上述方法还可包括：
当所述定时器为去激活定时器时， 所述 UE在启动或重启条件下启动或 重启去激活定时器， 该启动或重启条件可包括： 在去激活定时器对应的 CC 下行传输接收成功； 和 /或在去激活定时器对应的 CC上行传输发送成功。
支持 DRX的情况下， UE启动或重启去激活定时器的条件还可包括： 去 激活定时器对应的 CC对应的非活动定时器超时； 和 /或去激活定时器对应的 CC的所有下行 HARQ进程的重传定时器超时。
上述方法还可包括：
当所述定时器为去激活定时器时， 所述 UE在停止条件下停止去激活定 时器， 该停止条件可包括： UE在去激活定时器对应的 CC接收到下行指配； 和 /或 UE在去激活定时器对应的 CC接收到上行授权； 和 /或在去激活定时器 对应的 CC上行传输发送失败； 和 /或在去激活定时器对应的 CC下行传输接 收失败。在支持跨载波调度的情况下， UE停止去激活定时器的条件还可包括： UE接收到下行指配， 指示在去激活定时器对应的 CC接收数据； 和 /或 UE接 收到上行授权， 指示在去激活定时器对应的 CC接收反馈。
本发明还提供一种多载波系统中分量载波激活去激活的优化方法， 包 括： UE上报 CC的状态给基站；
所述基站根据接收到的 CC的状态判断是否与自身保存的所述 CC的状态 一致， 若不一致， 则发送激活命令和 /或去激活命令给所述 UE。
上述方法中， UE可以以 MAC控制元的方式上报 CC的状态给基站。 MAC 控制元可以携带处于激活状态的 CC的标识信息，和 /或处于去激活状态的 CC 的标识信息， 或者 MAC控制元可以携带位图， 位图指示处于激活状态的 CC 和 /或处于去激活状态的 CC。
上述方法中， UE可以在以下条件下上报 CC的状态给基站的： 周期上 报； 和 /或 UE收到激活命令或去激活命令； 和 /或 UE收到基站发送的 MAC 控制元， 请求 UE上报 CC的状态； 和 /或上行授权的填充比特足以填充所述 MAC控制元及其 MAC子头； 其中， 釆用非填充比特传递 CC状态的 MAC 控制元的优先级可以低于传递小区无线网络临时标识（C-RNTI ) 的 MAC控 制元， 可以低于来自上行公共控制信道（UL-CCCH )的数据， 可以高于釆用 非填充比特传递緩冲区状态报告 ( BSR )的 MAC控制元； 釆用填充比特传递 CC状态的 MAC控制元的优先级可以低于来自逻辑信道的数据， 可以低于釆 用填充比特传递 BSR的 MAC控制元。 周期上报可以是： 在周期定时器超时 时上报； 周期定时器可以在每次上报时启动或重启； 该方法还可包括： 基站 通过系统消息或 RRC消息将周期定时器的时长告知 UE。
本发明还提供一种多载波系统中分量载波激活去激活的优化系统， 包括 基站和 UE, 所述基站设置成： 通过 DCI发送激活命令给 UE, 指示激活所述 CC; 通过 DCI发送去激活命令给 UE, 指示去激活所述 CC;
所述 UE设置成： 若成功接收到所述激活命令， 则激活所述 CC, 并向所 述基站发送所述激活命令的反馈消息； 若成功接收到所述去激活命令， 则去 激活所述 CC, 并向所述基站发送所述去激活命令的反馈消息。
本发明还提供另一种多载波系统中分量载波激活去激活的优化系统， 包 括基站和 UE, 所述基站设置成： 通过 DCI连续多次发送激活命令给 UE, 指 示激活 CC; 以及， 通过 DCI连续多次发送去激活命令给 UE, 指示去激活 CC; 所述 UE设置成： 若一次或多次成功接收到所述激活命令， 则激活所述
CC; 若一次或多次成功接收到所述去激活命令， 则去激活所述 cc。
本发明还提供一种多载波系统中分量载波激活去激活的优化系统， 包括 基站和 UE, 所述 UE设置成： 维护一个或多个定时器， 当所述定时器超时或 停止， 所述 UE用于去激活所述定时器对应的一个或多个 CC; 或者， 当所述 定时器超时或停止时， 上报所述定时器对应的一个或多个 CC的标识信息给 基站；
所述基站设置成根据接收到的标识信息向所述 UE发送针对所述 CC的去 激活命令和 /或调度命令。
本发明还提供一种多载波系统中分量载波激活去激活的优化系统， 包括 基站和 UE, 所述 UE设置成上报 CC的状态给基站；
所述基站设置成根据接收到的 CC状态判断是否与自身保存的所述 CC 的状态一致， 若不一致， 则发送激活命令和 /或去激活命令给所述 UE。
本发明能够提高 LTE-A系统载波聚合技术的激活去激活可靠性， 具有配 置与操作简单、 保证基站与 UE之间的 CC状态一致等优点。
附图概述
图 1示出了激活去激活的状态迁移图；
图 2 示出了本发明实施例的根据 UE反馈发送激活命令的示意图； 图 3 示出了本发明实施例的连续发送激活命令的示意图；
图 4 示出了本发明实施例的根据 UE反馈发送去激活命令的示意图； 图 5 示出了本发明实施例的连续发送去激活命令的示意图。
本发明的较佳实施方式
在本发明中，提供了 LTE-A系统载波聚合技术的激活去激活可靠性方案， 包括：
方法一： （适用于激活去激活） 釆用 DCI的方式， 具体包括两种实现方式：
方式 A:
激活 CC时， 基站通过 DCI发送激活命令给 UE, 指示激活所述 CC; 若 所述 UE成功接收到所述激活命令， 则激活所述 CC, 并向所述基站发送接收 成功的反馈消息；
去激活 CC时， 基站通过 DCI发送去激活命令给 UE, 指示去激活所述 CC; 若所述 UE成功接收到所述去激活命令， 则去激活所述 CC, 并向所述 基站发送接收成功的反馈消息。
方式 B:
激活 CC时，基站通过 DCI连续多次发送激活命令给 UE,指示激活所述
CC; 若所述 UE成功接收到所述多次激活命令中的一次或多次， 则激活所述 CC;
去激活 CC时，基站通过 DCI连续多次发送去激活命令给 UE,指示去激 活所述 CC; 若所述 UE成功接收到所述多次去激活命令中的一次或多次， 则 去激活所述 CC。
方式 A和方式 B中，
激活和 /或去激活命令可以激活和 /或去激活一个或多个 CC, 激活命令中 需要包括激活的一个或多个 CC 的标识信息； 去激活命令不在去激活的 CC 上传递时， 需要包括去激活的一个或多个 CC的标识信息。
方法二： （适用于去激活）
釆用定时器的方式， 具体包括：
UE维护一个或多个定时器；
当所述定时器超时或停止， UE去激活所述定时器对应的一个或多个 CC; 或者， 当所述定时器超时或停止， UE上 >¾所述定时器对应的一个或多个 CC 的标识信息给基站。
基站根据所述标识信息向所述 UE发送针对所述 CC的去激活命令和 /或 调度命令。 方法三： （适用于激活去激活）
釆用上报 CC状态的方式， 具体包括：
UE上报 CC的状态给基站；
所述基站根据接收到的 CC状态判断是否与自身保存的所述 CC的状态一 致， 若不一致， 则发送激活命令和 /或去激活命令给所述 UE。
下面结合附图及具体实施例对本发明进行详细说明。
激活 CC的实施例：
釆用方法一：
为了保证 UE能够收到激活命令， 基站一次或多次发送激活命令。
方式 A: 所述激活命令可以根据 UE的反馈来发送（如图 2所示） ， 即 从基站角度来讲， 基站发送激活命令后等待接收 UE的反馈消息， 若在指定 的时刻 (指预先约定发送激活命令的时刻与接收反馈消息的时刻的时间间隔， 由发送激活命令的时刻与所述时间间隔共同指示的时刻， 如发送激活命令的 4ms后）基站没有收到所述反馈消息， 则基站重新发送激活命令。从 UE角度 来讲， UE在 PDCCH上以 C-RNTI ( Cell Radio Network Temporary Identifier , 小区无线网络临时标识）检测， 若检测到激活命令， 则认为接收成功， 激活 所述激活命令指示的 CC, 且在指定时刻 （如接收激活命令的 4ms后）发送 接收成功的反馈消息给基站。
方式 B: 所述激活命令也可以不根据 UE的反馈来发送（如图 3所示） ， 即从基站角度来讲， 基站连续多次发送激活命令， 以此来保证 UE接收成功。 从 UE角度来讲，UE在没有激活和去激活功能的 CC的 PDCCH上以 C-RNTI 检测， 若检测到激活命令， 则认为接收成功， 激活所述激活命令指示的 CC。 在基站发送的多个激活命令中， UE检测到任何一个都认为是接收成功。 UE 可选地发送反馈消息。 UE检测到激活命令后如果还检测到激活同一个 CC的 激活命令则忽略。
基站通过 DCI (如在激活命令中指示反馈消息在哪个 CC上传递） ， 或 者系统消息（如在系统消息中规定激活的 CC和反馈激活成功的 CC的固定配 对关系， 或者在系统消息中规定接收激活命令的 CC和反馈激活成功的 CC 的固定配对关系） ， 或者 RRC消息 （如在 RRC消息中规定激活的 CC和反 馈激活成功的 CC的固定配对关系， 或者在 RRC消息中规定接收激活命令的 CC和反馈激活成功的 CC的固定配对关系 )指定传递所述激活命令的反馈消 息的 cc。
即： 如果不是在固定配对的 CC上传递则通过 DCI, 如果是在固定配对 的 CC上传递， 所述配对关系可以通过系统信息、 RRC消息来指示。
所述激活命令可以釆用新引入的 DCI格式， 或者是现有的 DCI格式， 其 中部分字段釆用定值。 如： 激活下行 CC釆用现有格式 DCI格式 1 , 其中， 字段 "资源块指配（ resource block assignment ) " 、 "HARQ进程标识（ HARQ process number )"、 "新数据指示( new data indicator )，，、 "冗余版本( redundancy version ) " 、 "PUCCH传输功率控制命令 ( TPC command for PUCCH ) " 的 取值都可以为全 0, "调制编码方案 ( modulation and coding scheme ) " 最高 位取值为 0。 再如： 激活上行 CC釆用现有格式 DCI格式 0, 其中， 字段 "资 源块指配和 J?兆频资源分配 ( resource block assignment and hopping resource allocation ) " , "新数据指示（ new data indicator ) " 、 "PUSCH传输功率控 制命令（ TPC command for PUSCH )"、 "解调参考信号的循环移位（ cyclic shift for DM RS ) " 的取值都可以为全 0, "调制编码方式和冗余版本 ( modulation and coding scheme and redundancy version ) " 最高位取值为 0。
所述激活命令携带一个或多个 CC的标识信息， 用于激活所述一个或多 个 CC。
釆用方法三：
基站釆用 DCI发送激活命令指示 UE激活 CC, 若 UE没有检测到所述 DCI, 则可能出现基站认为 CC处于激活状态， 而 UE认为 CC处于去激活状 态。基站调度 UE在所述 CC上传输数据， 但是 UE无法在处于去激活状态的 CC上传输数据， 因此基站分配的这部分资源就浪费了。
出现这种情况时， UE上报 CC 的状态给基站， 所述基站根据接收到的 CC状态判断是否与自身保存的所述 CC的状态一致， 若不一致， 则发送激活 命令给所述 UE, 用于指示 UE认为的所述 CC的状态与所述基站认为的所述 CC的状态一致。 其中， 优选地， 所述 UE以 MAC控制元的方式上^艮 CC的状态给基站。 所述 MAC控制元携带处于激活状态的 CC的标识信息， 和 /或处于去激 活状态的 CC的标识信息，或者所述 MAC控制元携带位图， 所述位图指示处 于激活状态的 CC和 /或处于去激活状态的 CC。
基站根据上报的 CC状态可以知道对于 UE来说， 哪些 CC已经激活了， 哪些 CC已经去激活了。
所述 UE上报 CC的状态给基站的条件至少包括以下之一：
1 )周期上报；
2 )所述 UE收到激活命令或去激活命令；
3 )所述 UE收到基站发送的 MAC控制元， 请求 UE上报 CC的状态；
4 )上行授权的填充比特足以填充所述 MAC控制元及其 MAC子头。 所述周期上报是指： 周期定时器超时上报； 所述周期定时器每次上报时 启动或重启， 基站通过系统消息 （如： SIB2 )或 RRC消息 （如： RRC连接 重配消息）将所述周期定时器的时长告知 UE。
也就是说， UE可以主动上报 CC的状态信息。 如： UE自身维护一个定 时器（周期定时器） ， 当定时器超时上报当前的 CC状态。 此外， 上行资源 足够的情况下， UE也可以上报当前的 CC状态。 UE也可以被动上报 CC的 状态信息。 如： 基站在任意一个处于激活状态的 CC上发送消息（如 MAC控 制元 ) , 请求 UE上报 CC的状态信息。 UE收到所述消息则上报 CC的状态 信息。 此外， 激活命令也可以触发 UE上报 CC的状态信息， 作为本次激活命 令的反馈。
釆用非填充比特传递 CC状态 (即针对上述 UE上报 CC的状态给基站的 条件中的第 1 ~ 3条） 的 MAC控制元的优先级低于传递 C-RNTI的 MAC控 制元， 低于来自上行公共控制信道（UL-CCCH )的数据， 高于釆用非填充比 特传递緩冲区状态报告 ( BSR ) 的 MAC控制元；
釆用填充比特传递 CC状态 (即针对上述 UE上报 CC的状态给基站的条 件中的第 4条） 的 MAC控制元的优先级低于来自逻辑信道的数据， 低于釆 用填充比特传递 BSR的 MAC控制元。 去激活 cc的实施例：
釆用方法一：
与激活 CC的处理类似的。
为了保证 UE能够收到去激活命令， 基站一次或多次发送去激活命令。 方式 A: 所述去激活命令可以根据 UE的反馈来发送（如图 4所示） ， 即从基站角度来讲， 基站发送去激活命令后等待接收 UE的反馈消息， 若在 指定时刻 （指预先约定发送去激活命令的时刻与接收反馈消息的时刻的时间 间隔， 由发送去激活命令的时刻与所述时间间隔共同指示的时刻， 如发送去 激活命令的 4ms后）基站收到所述反馈消息， 则基站认为去激活成功， 若基 站没有收到所述反馈消息， 则基站重新发送去激活命令或者基站不发送去激 活命令。 从 UE角度来讲， UE在 PDCCH上以 C-RNTI检测， 若检测到去激 活命令， 则认为接收成功， 去激活所述去激活命令指示的 CC, 且在指定时刻 (如接收去激活命令的 4ms后）发送接收成功的反馈消息给基站。
方式 B:所述去激活命令也可以不根据 UE的反馈来发送（如图 5所示）， 即从基站角度来讲， 基站连续多次发送去激活命令， 以此来保证 UE接收成 功。 从 UE角度来讲， UE在 PDCCH上以 C-RNTI检测， 若检测到去激活命 令， 则认为接收成功， 去激活所述去激活命令指示的 CC。 在基站发送的多个 去激活命令中， UE检测到任何一个都认为是接收成功。 UE可选地发送反馈 消息。 UE检测到去激活命令后如果还检测到去激活同一个 CC的去激活命令 则忽略。
基站通过 DCI (如在去激活命令中指示反馈消息在哪个 CC上传递） ， 或者系统消息 （如在系统消息中规定接收去激活命令的 CC和反馈去激活成 功的 CC的固定配对关系） ， 或者 RRC消息 （如在 RRC消息中规定接收去 激活命令的 CC和反馈激活成功的 CC的固定配对关系）指定传递所述去激活 命令的反馈消息的 CC。
所述去激活命令可以釆用新引入的 DCI格式， 或者是现有的 DCI格式。 如：去激活下行 CC釆用现有格式 DCI格式 1 ,其中，字段"资源块指配（ resource block assignment ) ，， 、 "HARQ进程标识 ( HARQ process number ) "、 "新 数据指示 ( new data indicator )，，、 "冗余版本( redundancy version )，，、 "PUCCH 传输功率控制命令 ( TPC command for PUCCH ) " 的取值都可以为全 0, "调 制编码方案 ( modulation and coding scheme ) " 最高位取值为 0。 再如： 去激 活上行 CC釆用现有格式 DCI格式 0, 其中， 字段 "资源块指配和跳频资源 分西己 ( resource block assignment and hopping resource allocation ) " 、 "新数据 指示（ new data indicator ) " 、 "PUSCH传输功率控制命令 ( TPC command for PUSCH ) " 、 "解调参考信号的循环移位（ cyclic shift for DM RS ) " 的取 值都可以为全 0 , "调制编码方式和冗余版本（ modulation and coding scheme and redundancy version ) " 最高位取值为 0。
所述去激活命令通过所述去激活命令指示的 CC传递且只去激活一个 CC
(即传递去激活命令的 CC ) , 则可以不携带 CC的标识信息。 若所述去激活 命令不通过指示的 CC传递， 或者该去激活命令去激活多个 CC, 则该去激活 命令中携带一个或多个 CC的标识信息， 用于去激活一个或多个 cc。
釆用方法二：
UE维护一个或多个定时器； 当所述定时器超时或停止， UE去激活所述 定时器对应的一个或多个 CC; 或者， 当所述定时器超时或停止， UE上报所 述定时器对应的一个或多个 CC的标识信息给基站。
优选地， 所述 UE去激活所述定时器对应的一个或多个 CC后， 所述 UE 发送消息给基站， 告知基站所述去激活的一个或多个 CC的标识信息。
优选地， 所述基站收到携带一个或多个 CC的标识信息的消息， 才艮据所 述标识信息向所述 UE发送针对所述 CC的去激活命令和 /或调度命令。
所述消息釆用 MAC控制元的格式。
所述定时器可以是时间调整定时器 （TAT ) 、 激活定时器或去激活定时 器。
( 1 )所述定时器为时间调整定时器时：
所述时间调整定时器对应一个或多个具有激活和去激活功能的 CC。
若所述 UE只维护一个时间调整定时器时， 当所述时间调整定时器超时 或停止， 则 UE去激活所有具有激活和去激活功能的 CC; 并可选地在没有激 活和去激活功能的 CC (如提供随机接入功能）进行随机接入恢复上行同步之 后， 向基站上报去激活的 CC的标识信息。
若所述 UE维护多个时间调整定时器时， 当所述时间调整定时器超时或 停止， 则 UE去激活所述时间调整定时器对应的一个或多个具有激活和去激 活功能的 CC; 并可选地在没有激活和去激活功能的 CC或者处于激活状态的 CC向基站上报去激活的 CC的标识信息。
( 2 )所述定时器为新引入的定时器（ "激活定时器" ） 时：
所述激活定时器对应一个 CC, 所述 CC具有激活和去激活功能。
所述去激活定时器对应的 CC不包括： 作为所述 UE的服务小区（serving cell ) ； 作为所述 UE的主服务小区 （ primary serving cell ) ； 作为 UE的特殊 小区 （special cell ) ； 作为主控（anchor ) CC; 提供同步、 和 /或接入、 和 /或 系统信息和 /或寻呼功能的 CC; 作为测量参考、 和 /或切换、 和 /或随机接入时 的首选 CC; 提供安全输入参数和 /或非接入层移动性管理的信息的 cc。
当激活定时器超时， UE去激活所述激活定时器对应的 CC, 并可选的向 基站上报所述 CC的标识信息； 或者 UE向基站上报所述 CC的标识信息， 等 待基站的进一步命令处理， 如基站发送去激活命令， 则 UE根据所述去激活 命令去激活所述 CC。 若 UE在所述 CC上报， 则可以不携带标识信息。
所述基站通过系统消息 （如： SIB2 )或 RRC消息 （如： RRC连接重配 消息）将所述激活定时器的时长告知所述 UE。
所述 UE停止激活定时器的条件至少包括以下至少之一： 接收到去激活 命令， 所述去激活命令指示去激活所述激活定时器对应的 CC, 所述去激活命 令是显式的， 是 DCI或者 MAC控制元或者 RRC消息； 或者， 时间调整定时 器超时 （即上行失步） ， 所述超时的时间调整定时器对应的一个或多个 CC 包括所述激活定时器对应的 CC。
所述 UE启动或重启激活定时器的条件至少包括以下之一：
1 )所述 UE接收到激活命令， 指示激活所述激活定时器对应的 CC; 所 述激活命令是显式或者隐式的， 所述激活命令是 DCI或者 MAC控制元或者 RRC消息； 2 )所述 UE在所述激活定时器对应的 CC接收到指示首传或重传的下行 指配， 指示在所述激活定时器对应的 CC接收数据；
3 )所述 UE在所述激活定时器对应的 CC接收到指示首传或重传的上行 授权；
4 )所述 UE在所述激活定时器对应的 CC接收到指示发送上行数据失败 的反馈消息 （NACK ) ；
5 )所述 UE待发送上行数据， 在所述激活定时器对应的 CC等待接收上 行授权。
支持跨载波调度 ( cross carrier scheduling ) 的情况下， 所述 UE启动或重 启激活定时器的条件还至少包括以下之一：
1 )所述 UE接收到下行指配（包括指示首传或重传） ， 指示在所述激活 定时器对应的 CC接收数据。所述下行指配可以在所述激活定时器对应的 CC 上收到， 也可以在其他 CC上收到。
2 )所述 UE接收到上行授权 (包括指示首传或重传） ， 指示在所述激活 定时器对应的 CC接收反馈。所述下行指配可以在所述激活定时器对应的 CC 上收到， 也可以在其他 CC上收到。 所述指示接收反馈指的是： 所述上行授 权中携带所述激活定时器对应的 CC的标识信息，指示在所述 CC反馈； 或者 所述上行授权指示发送上行数据的 CC, 在系统消息或 RRC消息中指示所述 激活定时器对应的 CC用于对所述上行授权指示的 CC上发送的上行数据进行 反馈。
支持非连续接收（DRX ) 的情况下， 所述 UE启动或重启激活定时器的 条件还至少包括以下之一：
1 )所述激活定时器对应的 CC对应的非活动定时器（ drx-InactivityTimer ) 启动或重启；
2 )所述激活定时器对应的 CC的任一下行 HARQ进程对应的重传定时器
( drx-RetransmissionTimer )启动。
支持随机接入的情况下， 所述 UE启动或重启激活定时器的条件还至少 包括以下之一： 1 ) 竟 争 的 随 机 接 入 过 程 中 ， 竟 争 解 决 定 时 器 ( mac-ContentionResolutionTimer )启动或重启；
2 )非竟争的随机接入过程中， 随机接入成功之后， 所述 UE等待接收指 示首传的下行指配或者上行授权。
UE收到所述去激活命令时， 即使满足以上启动或者重启定时器的条件， 也停止定时器。
其中， "启动" 定时器是指： 该定时器之前处于停止状态， 而 "重启" 定时器是指： 该定时器之前处于运行状态。
( 3 )所述定时器为新引入的定时器（ "去激活定时器" ） 时：
所述去激活定时器对应一个 CC, 所述 CC具有激活和去激活功能。
所述去激活定时器对应的 CC不包括： 作为所述 UE的服务小区（serving cell ) ； 作为所述 UE的主服务小区 （primary serving cell ) ； 作为 UE的特殊 小区 （special cell ) ； 作为主控（anchor ) CC; 提供同步、 和 /或接入、 和 /或 系统信息和 /或寻呼功能的 CC; 作为测量参考、 和 /或切换、 和 /或随机接入时 的首选 CC; 提供安全输入参数和 /或非接入层移动性管理的信息的 CC。
该定时器超时时 UE去激活对应的 CC;即在去激活定时器规定的时长内， 所述去激活定时器所对应的一个或多个有激活去激活功能的 CC上没有数据 传输（以下行 CC为例， 指的是没有收到下行控制信息、 下行数据、 下行反 馈消息）， 则 UE去激活所述 CC, 并可选的向基站上报所述 CC的标识信息； 或者 UE向基站上报所述 CC的标识信息，等待基站的进一步命令处理，如基 站发送去激活命令， 则 UE根据所述去激活命令去激活所述 CC。 若 UE在所 述 CC上报， 则可以不携带标识信息。
所述基站通过系统消息 （如： SIB2 )或 RRC消息 （如： RRC连接重配 消息）将所述去激活定时器的时长告知所述 UE。
所述 UE启动或重启去激活定时器的条件至少包括以下之一：
1 )在所述去激活定时器对应的 CC下行传输接收成功（如 UE发送 ACK 的时刻） ；
2 )在所述去激活定时器对应的 CC上行传输发送成功（如 UE接收 ACK 的时刻） 。
支持 DRX的情况下，所述 UE启动或重启去激活定时器的条件还至少包 括以下之一：
1 ) 所述去激活定时器对应的 CC 对应的非活动定时器 ( drx-InactivityTimer )超时；
2 )所述去激活定时器对应的 CC的所有下行 HARQ进程的 DRX重传定 时器 ( drx-RetransmissionTimer )超时。
所述 UE停止去激活定时器的条件至少包括以下之一：
1 )所述 UE在所述去激活定时器对应的 CC接收到上行授权；
2 )所述 UE在所述去激活定时器对应的 CC接收到下行指配；
3 )在所述去激活定时器对应的 CC上行传输发送失败（如收到 NACK的 时刻） ；
4 )在所述去激活定时器对应的 CC下行传输接收失败（如发送 NACK的 时刻） 。
支持跨载波调度（ cross carrier scheduling ) 的情况下， 所述 UE停止去激 活定时器的条件还至少包括以下之一：
1 )所述 UE接收到下行指配（包括指示首传或重传） ， 指示在所述去激 活定时器对应的 CC接收数据。 所述下行指配可以在所述去激活定时器对应 的 CC上收到， 也可以在其他 CC上收到。
2 )所述 UE接收到上行授权 (包括指示首传或重传） ， 指示在所述去激 活定时器对应的 CC接收反馈。 所述下行指配可以在所述去激活定时器对应 的 CC上收到， 也可以在其他 CC上收到。 所述指示接收反馈指的是： 所述上 行授权中携带所述去激活定时器对应的 CC的标识信息，指示在所述 CC反馈； 或者所述上行授权指示发送上行数据的 CC, 在系统消息或 RRC消息中指示 所述去激活定时器对应的 CC用于对所述上行授权指示的 CC上发送的上行数 据进行反馈。
釆用方法三： 与激活 CC的流程类似的。
基站发送去激活命令指示 UE去激活 CC, 若 UE没有检测到所述去激活 命令， 则可能出现基站认为 CC处于去激活状态， 而 UE认为 CC处于激活状 态。 基站不会调度 UE, 而 UE—直在等待基站的调度， 导致 UE耗电。
出现这种情况时， UE上报 CC 的状态给基站， 所述基站根据接收到的
CC状态判断是否与自身保存的所述 CC的状态一致， 若不一致， 则发送与所 述 CC的状态相对应的去激活命令给所述 UE, 用于指示 UE认为的所述 CC 的状态与所述基站认为的所述 CC的状态一致。
其中， 优选地， 所述 UE以 MAC控制元的方式上^艮 CC的状态给基站。 所述 MAC控制元携带处于激活状态的 CC的标识信息， 和 /或处于去激 活状态的 CC的标识信息，或者所述 MAC控制元携带位图， 所述位图指示处 于激活状态的 CC和 /或处于去激活状态的 CC。
基站根据上报的 CC状态可以知道对于 UE来说， 哪些 CC已经激活了， 哪些 CC已经去激活了。
所述 UE上报 CC的状态给基站的条件至少包括以下之一：
1 )周期上报；
2 )所述 UE收到激活命令或去激活命令；
3 )所述 UE收到基站发送的 MAC控制元， 请求 UE上报 CC的状态；
4 )上行授权的填充比特足以填充所述 MAC控制元及其 MAC子头。 所述周期上报是指： 周期定时器超时上报； 所述周期定时器每次上报时 启动或重启， 基站通过系统消息 （如： SIB2 )或 RRC消息 （如： RRC连接 重配消息）将所述周期定时器的时长告知 UE。
也就是说， UE可以主动上报 CC的状态信息。 如： UE自身维护一个定 时器（周期定时器） ， 当定时器超时上报当前的 CC状态。 此外， 上行资源 足够的情况下， UE也可以上报当前的 CC状态。 UE也可以被动上报 CC的 状态信息。 如： 基站在任意一个处于激活状态的 CC上发送消息（如 MAC控 制元 ) , 请求 UE上报 CC的状态信息。 UE收到所述消息则上报 CC的状态 信息。 此外， 去激活命令也可以触发 UE上报 CC的状态信息， 作为本次去激 活命令的反馈。
釆用非填充比特传递 CC状态的 MAC控制元的优先级低于传递 C-RNTI 的 MAC控制元， 低于来自上行公共控制信道（UL-CCCH ) 的数据， 高于釆 用非填充比特传递緩冲区状态报告 ( BSR ) 的 MAC控制元；
釆用填充比特传递 CC状态的 MAC控制元的优先级低于来自逻辑信道的 数据， 低于釆用填充比特传递 BSR的 MAC控制元。
对以上三种方法的补充：
所述标识信息指的是 CC的频点， 和 /或 CC的索引， 和 /或 PCI ( Physical Cell Identifier,物理小区标识）， 和 /或 ECGI ( E-UTRAN Cell Global Identifier, 演进通用陆地无线接入网小区全局标识） 。
CC激活和 /或去激活， 与之配对的 CC也相应地激活和 /或去激活， 或者 维持原有状态。
所述没有激活和去激活功能的 CC至少满足以下之一：
作为所述 UE的服务小区 （Serving cell ) ； 作为所述 UE的主服务小区 ( Primary serving cell )；作为 UE的特殊小区 ( special cell )；作为主控 ( anchor ) CC; 提供同步、 和 /或接入、 和 /或系统信息和 /或寻呼功能的 CC; 作为测量 参考、 和 /或切换、 和 /或随机接入时的首选 CC; 提供安全输入参数和 /或 NAS ( Non-Access Stadium, 非接入层）移动性管理的信息的 CC。
本发明实施例的多载波系统中分量载波激活去激活的优化系统， 包括基 站和 UE, 所述基站设置成： 通过 DCI发送激活命令给 UE, 指示激活所述 CC; 通过 DCI发送去激活命令给 UE, 指示去激活所述 CC;
所述 UE设置成： 若成功接收到所述激活命令， 则激活所述 CC, 并向所 述基站发送接收成功的反馈消息； 若成功接收到所述去激活命令， 则去激活 所述 CC, 并向所述基站发送接收成功的反馈消息。
本发明实施例的多载波系统中分量载波激活去激活的优化系统， 包括基 站和 UE, 所述基站设置成： 通过 DCI连续多次发送激活命令给 UE, 指示 激活 CC; 以及， 通过 DCI连续多次发送去激活命令给 UE, 指示去激活 CC; 所述 UE设置成： 若成功接收到所述多次激活命令中的一次或多次， 则 激活所述 CC; 若成功接收到所述多次去激活命令中的一次或多次， 则去激活 所述 cc。
本发明实施例的多载波系统中分量载波激活去激活的优化系统， 包括基 站和 UE, 所述 UE设置成： 维护一个或多个定时器， 当所述定时器超时或 停止， 所述 UE用于去激活所述定时器对应的一个或多个 CC; 或者， 当所述 定时器超时或停止， 上 "^所述定时器对应的一个或多个 CC的标识信息给基 站；
所述基站设置成根据接收到的标识信息向所述 UE发送针对所述 CC的去 激活命令和 /或调度命令。
本发明实施例的多载波系统中分量载波激活去激活的优化系统， 包括基 站和 UE,
所述 UE设置成上报 CC的状态给基站；
所述基站设置成：根据接收到的 CC状态判断是否与自身保存的所述 CC 的状态一致， 若不一致， 则发送激活命令和 /或去激活命令给所述 UE。
从以上的描述中， 可以看出， 本发明提出了 LTE-A系统载波聚合中的激 活去激活可靠性方案， 该方法具有配置与操作简单、 保证基站与 UE之间的 CC状态一致等优点。
当然， 本发明还可有其它多种实施例， 在不背离本发明精神及其实质的 但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。
工业实用性
与现有技术相比， 本发明能够提高 LTE-A系统载波聚合技术的激活和去 激活可靠性，具有配置与操作简单、保证基站与 UE之间的 CC状态一致等优 点。

Claims

权 利 要 求 书
1、 一种多载波系统中分量载波激活去激活的优化方法， 包括： 激活分量载波 CC时， 基站通过下行控制信息 DCI发送激活命令给用户 设备 UE, 指示激活 CC; 若所述 UE成功接收到所述激活命令， 则激活所述 CC, 并向所述基站发送所述激活命令的反馈消息；
去激活 CC时， 基站通过 DCI发送去激活命令给 UE, 指示去激活 CC; 若所述 UE成功接收到所述去激活命令， 则去激活所述 CC, 并向所述基站发 送所述去激活命令的反馈消息。
2、 如权利要求 1所述的方法， 还包括：
所述基站发送激活命令给 UE后， 若在指定的时刻没有接收到所述激活 命令的反馈消息， 则再次发送所述激活命令给 UE;
所述基站发送去激活命令给 UE后， 若在指定的时刻没有接收到所述去 激活命令的反馈消息， 则再次发送所述去激活命令给 UE。
3、 如权利要求 1所述的方法， 还包括：
基站通过所述激活命令， 或者系统信息， 或者无线资源控制 RRC消息指 定传递所述激活命令的反馈消息的 CC;
基站通过所述去激活命令， 或者系统信息， 或者 RRC消息指定传递所述 去激活命令的反馈消息的 CC。
4、 一种多载波系统中分量载波激活去激活的优化方法， 包括： 激活分量载波 CC时， 基站通过下行控制信息 DCI连续多次发送激活命 令给用户设备 UE, 指示激活 CC; 若所述 UE—次或多次成功接收到所述激 活命令， 则激活所述 CC;
去激活 CC时，基站通过 DCI连续多次发送去激活命令给 UE,指示去激 活 CC; 若所述 UE—次或多次成功接收到所述去激活命令， 则去激活所述 CC。
5、 如权利要求 4所述的方法， 还包括：
若所述 UE成功接收到所述激活命令， 则向所述基站发送所述激活命令 的反馈消息；
若所述 UE成功接收到所述去激活命令， 则向所述基站发送所述去激活 命令的反馈消息。
6、 如权利要求 5所述的方法， 还包括：
基站通过所述激活命令， 或者系统信息， 或者无线资源控制 RRC消息指 定传递所述激活命令的反馈消息的 CC;
基站通过所述去激活命令， 或者系统信息， 或者 RRC消息指定传递所述 去激活命令的反馈消息的 CC。
7、 一种多载波系统中分量载波去激活的优化方法， 包括：
用户设备 UE维护一个或多个定时器；
当所述定时器超时或停止， UE去激活所述定时器对应的一个或多个分量 载波 CC; 或者， 当所述定时器超时或停止， UE上 >¾所述定时器对应的一个 或多个 CC的标识信息给基站。
8、 如权利要求 7所述的方法， 还包括：
所述 UE去激活所述定时器对应的一个或多个 CC后，上报所述定时器对 应的一个或多个 CC的标识信息给基站。
9、 如权利要求 7或 8所述的方法， 还包括：
所述 UE上报所述一个或多个 CC的标识信息给基站后，基站根据接收到 的标识信息向所述 UE发送针对所述一个或多个 CC的去激活命令和 /或调度 命令。
10、 如权利要求 7或 8所述的方法， 其中，
所述 UE上报所述一个或多个 CC的标识信息时， 釆用媒体接入控制层 MAC控制元的格式上报所述一个或多个 CC的标识信息。
11、 如权利要求 7所述的方法， 其中，
所述定时器为时间调整定时器， 所述时间调整定时器对应一个或多个具 有激活和去激活功能的 CC。
12、 如权利要求 7所述的方法， 其中， 所述定时器为激活定时器；
所述方法还包括：所述基站通过系统消息或无线资源控制 RRC消息将所 述激活定时器的时长告知所述 UE。
13、 如权利要求 7所述的方法， 其中，
所述定时器为激活定时器；
所述方法还包括： 所述 UE在停止条件下停止所述激活定时器， 所述停 止条件包括：
所述 UE接收到去激活命令， 所述去激活命令指示去激活所述激活定时 器对应的 CC; 和 /或
时间调整定时器超时， 超时的时间调整定时器对应的一个或多个 CC 包 括所述激活定时器对应的 cc。
14、 如权利要求 7所述的方法， 其中，
所述定时器为激活定时器；
所述方法还包括： 所述 UE在启动或重启条件下启动或重启所述激活定 时器， 所述启动或重启条件包括：
所述 UE接收到激活命令， 指示激活所述激活定时器对应的 CC; 和 /或 所述 UE在所述激活定时器对应的 CC接收到下行指配； 和 /或
所述 UE在所述激活定时器对应的 CC接收到上行授权； 和 /或
所述 UE在所述激活定时器对应的 CC接收到指示发送上行数据失败的反 馈消息； 和 /或
所述 UE待发送上行数据，在所述激活定时器对应的 CC等待接收上行授 权。
15、 如权利要求 14所述的方法， 其中，
在支持跨载波调度的情况下， 所述启动或重启条件还包括：
所述 UE接收到下行指配， 指示在所述激活定时器对应的 CC接收数据； 和 /或 所述 UE接收到上行授权， 指示在所述激活定时器对应的 CC接收反馈； 在支持非连续接收 DRX的情况下， 所述启动或重启条件还包括： 所述激活定时器对应的 CC对应的非活动定时器启动或重启； 和 /或 所述激活定时器对应的 CC的任一下行混合自动重传 HARQ进程对应的 重传定时器启动；
在支持随机接入的情况下， 所述启动或重启条件还包括：
竟争的随机接入过程中， 竟争解决定时器启动或重启； 和 /或
非竟争的随机接入过程中， 随机接入成功之后， 所述 UE等待接收指示 首传的下行指配或者上行授权。
16、 如权利要求 7所述的方法， 其中，
所述定时器为去激活定时器；
所述方法还包括： 所述 UE在启动或重启条件下启动或重启所述去激活 定时器， 所述启动或重启条件包括：
在所述去激活定时器对应的 CC下行传输接收成功； 和 /或
在所述去激活定时器对应的 CC上行传输发送成功。
17、 如权利要求 16所述的方法， 其中，
在支持 DRX的情况下， 所述启动或重启条件还包括：
所述去激活定时器对应的 CC对应的非活动定时器超时； 和 /或
所述去激活定时器对应的 CC的所有下行 HARQ进程的重传定时器超时。
18、 如权利要求 7所述的方法， 其中，
所述定时器为去激活定时器；
所述方法还包括： 所述 UE在停止条件下停止所述去激活定时器， 所述 停止条件包括：
所述 UE在所述去激活定时器对应的 CC接收到下行指配； 和 /或 所述 UE在所述去激活定时器对应的 CC接收到上行授权； 和 /或 在所述去激活定时器对应的 CC上行传输发送失败； 和 /或 在所述去激活定时器对应的 CC下行传输接收失败。
19、 如权利要求 18所述的方法， 其中，
在支持跨载波调度的情况下， 所述停止条件还包括：
所述 UE接收到下行指配，指示在所述去激活定时器对应的 CC接收数据； 和 /或
所述 UE接收到上行授权,指示在所述去激活定时器对应的 CC接收反馈。
20、 一种多载波系统中分量载波激活去激活的优化方法， 包括： 用户设备 UE上报分量载波 CC的状态给基站；
所述基站根据接收到的 CC的状态判断是否与自身保存的所述 CC的状态 一致， 若不一致， 则发送激活命令和 /或去激活命令给所述 UE。
21、 如权利要求 20所述的方法， 其中，
UE上报 CC的状态给基站的步骤中， 所述 UE以接入控制层 MAC控制 元的方式上 4艮所述 CC的状态给基站。
22、 如权利要求 21所述的方法， 其中，
所述 MAC控制元携带处于激活状态的 CC的标识信息， 和 /或处于去激 活状态的 CC的标识信息，或者所述 MAC控制元携带位图， 所述位图指示处 于激活状态的 CC和 /或处于去激活状态的 CC。
23、 如权利要求 21所述的方法， 其中，
UE上报 CC的状态给基站的步骤中，所述 UE在以下条件下上报所述 CC 的状态给基站：
周期上报； 和 /或
所述 UE收到激活命令或去激活命令； 和 /或
所述 UE收到基站发送的 MAC控制元， 请求 UE上报 CC的状态； 和 / 或
上行授权的填充比特足以填充所述 MAC控制元及其 MAC子头； 其中，釆用非填充比特传递 CC的状态的 MAC控制元的优先级低于传递 小区无线网络临时标识 C-RNTI的 MAC控制元，低于来自上行公共控制信道 UL-CCCH的数据， 高于釆用非填充比特传递緩冲区状态报告 BSR的 MAC 控制元；
釆用填充比特传递 CC的状态的 MAC控制元的优先级低于来自逻辑信道 的数据， 低于釆用填充比特传递 BSR的 MAC控制元。
24、 如权利要求 23所述的方法， 其中，
所述周期上报的条件为： 在周期定时器超时时上报；
所述方法还包括： 所述周期定时器在每次上报时启动或重启， 基站通过 系统消息或无线资源控制 RRC消息将所述周期定时器的时长告知 UE。
25、一种多载波系统中分量载波激活去激活的优化系统，包括基站和 UE, 其中，
所述基站设置成： 通过下行控制信息 DCI发送激活命令给 UE, 指示激 活所述分量载波 CC; 以及通过 DCI发送去激活命令给 UE, 指示去激活所述 CC;
所述 UE设置成： 若成功接收到所述激活命令， 则激活所述 CC, 并向所 述基站发送所述激活命令的反馈消息； 若成功接收到所述去激活命令， 则去 激活所述 CC, 并向所述基站发送所述去激活命令的反馈消息。
26、一种多载波系统中分量载波激活去激活的优化系统，包括基站和 UE, 其中，
所述基站设置成： 通过下行控制信息 DCI连续多次发送激活命令给 UE, 指示激活分量载波 CC; 以及， 通过 DCI连续多次发送去激活命令给 UE, 指 示去激活 CC;
所述 UE设置成： 若一次或多次成功接收到所述基站发送的激活命令， 则激活所述 CC; 若一次或多次成功接收到所述基站发送的去激活命令， 则去 激活所述 CC。
27、一种多载波系统中分量载波激活去激活的优化系统，包括基站和 UE, 其中，
所述 UE设置成： 维护一个或多个定时器， 当所述定时器超时或停止时， 去激活所述定时器对应的一个或多个分量载波 CC; 或者， 当所述定时器超时 或停止时， 上报所述定时器对应的一个或多个 CC的标识信息给基站；
所述基站设置成根据接收到的标识信息向所述 UE发送针对所述一个或 多个 CC的去激活命令和 /或调度命令。
28、一种多载波系统中分量载波激活去激活的优化系统，包括基站和 UE, 其中，
所述 UE设置成上报分量载波 CC的状态给基站；
所述基站设置成根据接收到的 CC的状态判断是否与自身保存的所述 CC 的状态一致， 若不一致， 则发送激活命令和 /或去激活命令给所述 UE。
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