WO2011069378A1 - Procédé et système optimisés pour l'activation et la désactivation de porteuses élémentaires dans un système à porteuses multiples - Google Patents

Procédé et système optimisés pour l'activation et la désactivation de porteuses élémentaires dans un système à porteuses multiples 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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WO
WIPO (PCT)
Prior art keywords
timer
base station
deactivation
activation
command
Prior art date
Application number
PCT/CN2010/076538
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English (en)
Chinese (zh)
Inventor
陈思
张健
王冠宙
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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 MX2012006531A priority Critical patent/MX2012006531A/es
Priority to EP10835413.5A priority patent/EP2493240A4/fr
Priority to BR112012013550-3A priority patent/BR112012013550B1/pt
Priority to RU2012120621/07A priority patent/RU2515553C2/ru
Priority to JP2012542344A priority patent/JP5525061B2/ja
Priority to KR1020127014569A priority patent/KR101373304B1/ko
Priority to US13/511,671 priority patent/US20120294213A1/en
Publication of WO2011069378A1 publication Critical patent/WO2011069378A1/fr

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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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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention concerne un procédé et un système optimisés pour l'activation et la désactivation de porteuses élémentaires (CC) dans un système à porteuses multiples. Le procédé comprend les étapes suivantes : lors de l'activation de la porteuse élémentaire, la station de base envoie l'instruction d'activation à l'équipement utilisateur (UE) avec des informations de commande de liaison descendante, afin de commander l'activation de la porteuse élémentaire; si l'équipement utilisateur reçoit correctement l'instruction d'activation, il active la porteuse élémentaire et envoie à la station de base des informations en retour sur l'instruction d'activation; lors de la désactivation de la porteuse élémentaire, la station de base envoie l'instruction de désactivation à l'équipement utilisateur avec des informations de commande de liaison descendante, afin de commander la désactivation de la porteuse élémentaire; si l'équipement utilisateur reçoit correctement l'instruction de désactivation, il désactive la porteuse élémentaire et envoie à la station de base des informations en retour sur l'instruction de désactivation. La présente invention peut améliorer la fiabilité des activations et désactivations de la technologie polymère de porteuse dans un système LTE-A et offre les avantages d'une configuration et d'un fonctionnement simples; elle assure la cohérence de l'état de la porteuse élémentaire entre la station de base et l'équipement utilisateur.
PCT/CN2010/076538 2009-12-08 2010-09-01 Procédé et système optimisés pour l'activation et la désactivation de porteuses élémentaires dans un système à porteuses multiples WO2011069378A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
MX2012006531A MX2012006531A (es) 2009-12-08 2010-09-01 Metodo y sistma optimizado para activar y desactivar portador de componentes en sistema de portadores multiples.
EP10835413.5A EP2493240A4 (fr) 2009-12-08 2010-09-01 Procédé et système optimisés pour l'activation et la désactivation de porteuses élémentaires dans un système à porteuses multiples
BR112012013550-3A BR112012013550B1 (pt) 2009-12-08 2010-09-01 método aperfeiçoado para desativar uma portadora de componente em um sistema de multiportadora, método aperfeiçoado para ativar e desativar uma portadora de componente em um sistema de multiportadora e, sistema aperfeiçoado para ativar e desativar uma portadora de componente em um sistema de multiportadora
RU2012120621/07A RU2515553C2 (ru) 2009-12-08 2010-09-01 Оптимизированный способ и система для активации и деактивации несущей в системе с множеством несущих
JP2012542344A JP5525061B2 (ja) 2009-12-08 2010-09-01 マルチキャリアシステムにおけるコンポーネントキャリアのアクティブ化・アクティブ化解除の最適化方法及びシステム
KR1020127014569A KR101373304B1 (ko) 2009-12-08 2010-09-01 다중 반송파 시스템에서 요소 반송파를 활성화/비활성화시키기 위한 최적화 방법 및 시스템
US13/511,671 US20120294213A1 (en) 2009-12-08 2010-09-01 Optimized method and system for activating and deactivating component carrier in multi-carrier system

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US20120294213A1 (en) 2012-11-22
RU2515553C2 (ru) 2014-05-10
JP2013513321A (ja) 2013-04-18
BR112012013550B1 (pt) 2021-05-04
BR112012013550A2 (pt) 2017-09-05
KR20120093330A (ko) 2012-08-22
MX2012006531A (es) 2012-07-04
KR101373304B1 (ko) 2014-03-11
EP2493240A1 (fr) 2012-08-29
RU2012120621A (ru) 2014-01-20
JP5525061B2 (ja) 2014-06-18

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