WO2012040892A1 - 载波聚合系统中载波状态的处理方法和用户设备 - Google Patents

载波聚合系统中载波状态的处理方法和用户设备 Download PDF

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Publication number
WO2012040892A1
WO2012040892A1 PCT/CN2010/077363 CN2010077363W WO2012040892A1 WO 2012040892 A1 WO2012040892 A1 WO 2012040892A1 CN 2010077363 W CN2010077363 W CN 2010077363W WO 2012040892 A1 WO2012040892 A1 WO 2012040892A1
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Prior art keywords
component carrier
random access
secondary component
downlink
carrier
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PCT/CN2010/077363
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English (en)
French (fr)
Inventor
徐海博
鲁艳玲
太田好明
周华
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富士通株式会社
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Application filed by 富士通株式会社 filed Critical 富士通株式会社
Priority to CN2010800689550A priority Critical patent/CN103081553A/zh
Priority to PCT/CN2010/077363 priority patent/WO2012040892A1/zh
Publication of WO2012040892A1 publication Critical patent/WO2012040892A1/zh
Priority to US13/788,371 priority patent/US20130182668A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0833Random access procedures, e.g. with 4-step access
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/002Transmission of channel access control information
    • H04W74/008Transmission of channel access control information with additional processing of random access related information at receiving side
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/30Connection release
    • H04W76/38Connection release triggered by timers

Definitions

  • the present invention relates to wireless communication technologies, and more particularly to a method and a user equipment for processing a carrier state in a carrier aggregation system. Background technique
  • LTE-Advanced Long Term Evolution
  • LTE-A advanced long-term evolution systems
  • ITU's proposed downlink lGbps for 4G systems and high data rate requirements for uplink 500 Mbps 3GPP proposed carrier aggregation technology in LTE-A to support bandwidth values capable of providing the high data rate requirements.
  • the carrier aggregation technology can aggregate multiple carriers in different frequency bands to form a bandwidth of up to 100M, so that LTE-A user equipment (UE, also called mobile terminal, mobile station, etc.) can receive and / or send data, so that the bandwidth of sending or receiving data is greater than 20M.
  • LTE-A user equipment UE, also called mobile terminal, mobile station, etc.
  • each aggregated carrier is called a component carrier (CC).
  • An Evolved NodeB (eNB) can configure multiple component carriers for the UE according to the service requirements of the UE.
  • One of the component carriers is defined as a primary component carrier (Primary CC, PCC), and the remaining component carriers are defined as a secondary component carrier (Secondary CC, SCC).
  • Primary CC Primary component carrier
  • SCC secondary component carrier
  • an activation/deactivation operation is introduced to the downlink component carrier. That is, the eNB can control the UE to perform activation and deactivation on the downlink secondary component carrier according to the downlink traffic of the UE.
  • the UE After the UE deactivates a downlink secondary component carrier, the UE does not need to perform the following operations: (1) listening to the physical downlink control channel (PDCCH) of the component carrier; (2) listening to the component carrier. Physical Downlink Share Channel (PDSCH); (3) Feedback of Channel Quality Information (CQI) of the component carrier.
  • PDCCH physical downlink control channel
  • PDSCH Physical Downlink Share Channel
  • CQI Feedback of Channel Quality Information
  • Manner 1 The eNB controls the UE to activate/deactivate each downlink sub-component carrier through Medium Access Control (MAC) signaling.
  • MAC Medium Access Control
  • Manner 2 The UE establishes a deactivation timer for each secondary component carrier. The UE will enable (including restart) the corresponding deactivation timer of the downlink member carrier under the following three conditions.
  • the UE receives a MAC signaling request to activate the downlink secondary component carrier
  • the UE receives the PDCCH signaling on the downlink secondary component carrier, where the PDCCH signaling indicates that the scheduled secondary component carrier transmits uplink data on the physical uplink shared channel (PUSCH) or receives downlink data on the PDSCH. ;
  • PUSCH physical uplink shared channel
  • the UE receives the PDCCH signaling on the other component carriers, and the PDCCH signaling indicates that the downlink secondary component carrier is scheduled to receive downlink data on its PDSCH.
  • the UE will always cause the downlink sub-component carrier to be in an active state.
  • the UE will deactivate the member carrier.
  • the UE deactivates all of its active downlink component carriers. .
  • TAT Time Advance Timer
  • the eNB sends a Time Advance Command (TAC) to the UE at intervals.
  • TAC Time Advance Command
  • the UE maintains a TAT for the uplink peer process.
  • the UE will restart the TAT whenever a TAC is received. If the UE still does not receive the TAC after the TAT timing expires, it means that the UE has lost the uplink peer.
  • the UE needs to perform the random access procedure first to obtain the uplink in the current Rel-10.
  • all configured component carriers can use only one uplink peer process. That is, the establishment of the uplink peer and the maintenance of the uplink peer need only be performed on the primary member carrier.
  • the random access procedure for establishing uplink peers is performed only on the primary component carrier, and on the secondary component carrier. The random access process will not be performed.
  • a random access procedure is also required on the secondary component carriers.
  • the random access technology is a primary step in establishing a connection between a UE and an eNB in a mobile communication system for communication.
  • the purpose of random access is to enable the UE to establish a connection with the network or to enable the UE to obtain uplink peers.
  • the random access procedure can be divided into contention-based random access and non-contention-based random access.
  • the non-contention based random access procedure is generally used for downlink data arrival and the UE does not obtain uplink peers. And locate three scenes.
  • the eNB may specify a preamble resource used by the random access by the PDCCH order (PDCCH order) or the handover command, thereby preventing the UE from colliding with other UEs to select the same resource.
  • PDCCH order PDCCH order
  • the handover command thereby preventing the UE from colliding with other UEs to select the same resource.
  • the contention-based random access procedure can be applied to all processes that need to initiate random access.
  • the RRC initial connection establishment is also included, the RRC connection is reestablished, and the uplink data arrives and the UE does not obtain the uplink peer.
  • the random access procedure may be triggered by the eNB (such as triggered by the PDCCH order) or by the UE itself (such as by the MAC sublayer).
  • FIG. 1 is a schematic flowchart of the contention-based random access initiated by the UE in the prior art. . As shown in Figure 1, the process can be divided into the following steps:
  • Step S101 Send a preamble signal (the Preambled preamble signal is identified by a unique identifier RAPID.
  • the UE may send the selected preamble signal on the selected time-frequency resource.
  • a step (not shown) triggered by the eNB is also included, such as the eNB sending a message for triggering random access, such as PDCCH order, to the UE.
  • Ho step SI 02 receives a random access response from the eNB (random access response, RAR) 0 RAR is a multicast message, select the same time and frequency resources UE transmits the preamble signal can receive the message, the UE in After receiving the RAR, it is also detected whether the RAR contains a matching RAPID. If the RAR contains the RAPID, the UE considers that the RAR is successfully received. If the RAR is not received, or the received RAR does not contain the RAPID, the UE considers that the random access fails.
  • RAR random access response
  • Step S103 sending uplink data (ie, Msg3) to the eNB, where the uplink data may include a Cell Radio Network Temporary Identifier (C-RNTI) of the UE and other information.
  • Step S104 The UE receives a contention resolution message (ie, Msg4) from the eNB, and the random access succeeds.
  • the UE For non-contention based random access, the UE sends a preamble signal to the eNB, and after receiving the random access response from the eNB, it will further monitor the PDCCH signaling from the eNB indicating the uplink grant or the downlink assignment.
  • the present invention is directed to providing a carrier state processing method and user equipment in a carrier aggregation system for overcoming one or more disadvantages due to limitations of the prior art, and at least providing a beneficial alternative.
  • a method for processing a carrier in a carrier aggregation system comprising: performing random access on a secondary component carrier pair; and stopping or ignoring the random access before the random access succeeds The deactivation timer of the member carrier pair to the downlink member carrier.
  • a method for processing a carrier in a carrier aggregation system comprising: deactivating a downlink in a member carrier pair if a time advance timer of the secondary component carrier times out The secondary component carrier, and stops or ignores the deactivation timer of the downlink secondary component carrier.
  • a user equipment configured to include: a sending unit, configured to send a preamble signal to a base station on an uplink secondary component carrier of a secondary component carrier pair, to request the base station a random access; a receiving unit, configured to receive a response from the base station on a downlink secondary component carrier of the secondary member carrier pair; and a timing control unit, configured to stop or ignore the random access before the random access succeeds Deactivation timer of the downlink member carrier.
  • a user equipment comprising: a time advance timer corresponding to a secondary component carrier pair; an activation control unit, configured to After the time advance timer expires, the downlink secondary component carrier in the secondary component carrier pair is deactivated; and a timing control unit is configured to stop or ignore the downlink secondary component carrier after the time advance timer expires Deactivate the timer.
  • the problem that the random access procedure cannot be performed normally due to the timeout of the downlink member carrier deactivation timer occurs is avoided.
  • the problem that the random access procedure cannot be performed normally by the way that the time advance timer expires to activate the component carrier is avoided.
  • the problem that the random access procedure cannot be performed normally due to the timeout of the downlink member carrier deactivation timer occurs is avoided.
  • the problem that the random access procedure that may be caused by the way of activating the component carrier by the time advance timer timeout is avoided can not be avoided.
  • FIG. 1 is a schematic flowchart of a contention-based random access procedure in the prior art
  • FIG. 2 shows a scenario of random access on a secondary member carrier in accordance with an activation/deactivation manner of an existing secondary member carrier
  • FIGS 3 and 4 show the presence of the deactivation timer super in the scene shown in Figure 2. Random access failure caused by time;
  • Figure 5 is a flow chart showing a method of processing a secondary member carrier state in an exemplary embodiment of the present invention
  • FIG. 8 is a diagram showing a scenario in which random access is stopped again due to random access failure in an exemplary embodiment of the present invention.
  • FIG. 9 illustrates a scenario in which a secondary component carrier is reselected for random access due to random access failure in an exemplary embodiment of the present invention
  • FIG. 10 is a flow chart showing a method of processing a secondary member carrier state in another exemplary embodiment of the present invention.
  • Figure 11 illustrates a scenario of random access failures that may result from random access on a secondary component carrier based on the TAT deactivation mode currently under discussion
  • Figure 12 is a flow chart showing a method of processing a secondary member carrier state in another exemplary embodiment of the present invention.
  • FIG. 13 shows an example of a block diagram of a user equipment in an exemplary embodiment of the present invention
  • Fig. 14 shows an example of a block diagram of a user equipment in another exemplary embodiment of the present invention. detailed description
  • the UE There are three methods for the UE to detect the failure of the random access procedure: (1) after the preamble signal is transmitted, no random access response message from the eNB is received in a time window (hereinafter referred to as a random access response time window); (2) After the preamble signal is sent, the random access response message from the eNB is received in the random access response time window, but the identifier RAPID of the preamble signal sent by the UE is not included in the message, that is, the random access The incoming response message is not the random access response message of the UE; (3) after the Msg3 is sent, the contention resolution timer is started, and the contention resolution message from the eNB is not received before the contention resolution timer expires.
  • the UE After discovering that the random access procedure fails, the UE adopts a backoff mechanism to initiate a random access procedure after a period of backoff.
  • the backoff parameter may be stored in the UE in advance, or may be carried in signaling (e.g., random access response or other message) from the eNB.
  • the deactivation timer is started after receiving the random access response message, and in the random access procedure initiated again, if the deactivation timer is After the preamble signal is sent, the timeout expires before receiving the random access response of the eNB, then the UE stops monitoring the PDCCH, and the random access response message cannot be received normally, so that the random access process fails, as shown in FIG. 3 and FIG. Show.
  • the UE deactivates all of its active secondary component carriers. However, it does not specify whether to stop the corresponding deactivation timer after deactivating the downlink member carrier due to the TAT timeout.
  • Embodiments of the present invention have been made in view of the above problems 1 and 2.
  • the method for processing the component carrier state includes The following steps:
  • Step S510 Perform random access on the secondary component carrier pair.
  • the secondary component carrier pair (eg, secondary component carrier pair SCC1) includes one uplink secondary component carrier and one downlink secondary component carrier.
  • the random access may be initiated by the eNB (e.g., the eNB sends a PDCCH order to the UE) or may be initiated by the UE (e.g., triggered by the MAC layer).
  • the UE After receiving the PDCCH order from the eNB, or after being triggered by the own MAC layer, the UE sends a preamble signal for random access to the eNB on the uplink secondary component carrier, and listens for the response from the eNB on the downlink secondary component carrier.
  • the downlink secondary component carrier may be activated before or after transmitting the preamble signal to the base station, so as to be able to monitor
  • Step S520 Stop or ignore the deactivation timer of the downlink component carrier before the random access succeeds.
  • stopping the deactivation timer of the downlink member carrier means not turning the downlink down.
  • the deactivation timer of the secondary component carrier ignoring the deactivation timer of the downlink component carrier means that: even if the deactivation timer of the downlink component carrier is enabled, it does not respond to the timeout of the deactivation timer of the downlink component carrier. Any action is taken, that is, the deactivation timer of the downlink secondary component carrier is considered to be stopped. Therefore, in the embodiment of the present invention, the deactivation timer of the downlink sub-component carrier is not used before the random access succeeds.
  • the downlink secondary component carrier when the random access is initiated, if the downlink secondary component carrier is in a deactivated state and the random access procedure is initiated by the UE, when the UE sends the preamble signal, the downlink secondary component carrier is implicitly activated. However, the corresponding deactivation timer is not turned on, and the deactivation timer is stopped. If the deactivation timer of the downlink member carrier is already on, the deactivation timer is stopped, or the deactivation timer is ignored (the timeout for not responding to the deactivation timing).
  • the UE implicitly activates the PDCCH order after receiving the PDCCH order from the eNB.
  • the secondary member carrier is downlinked, but the corresponding deactivation timer is not turned on, and the deactivation timer is stopped. If the deactivation timer of the downlink component carrier is already on, the deactivation timer is stopped, or the deactivation timer is ignored.
  • the active state is maintained, and the deactivation timer is stopped or ignored after the UE sends the preamble signal.
  • the active state is maintained, and the downlink is stopped or ignored after the UE receives the PDCCH order from the eNB.
  • the corresponding deactivation timer of the secondary component carrier is
  • the deactivation timer when performing random access, whether it is initiated by the UE or initiated by the eNB, the preamble signal may be transmitted at the UE.
  • the downlink member carrier is activated and the deactivation timer is stopped or ignored.
  • the activation timer effectively avoids the random access failure caused by the timeout of the downlink member carrier deactivation timer, thereby reducing the possibility of random access failure, compared with using the deactivation timer during random access. Sex.
  • the downlink secondary component carrier when performing random access, the downlink secondary component carrier is in an active state, because the UE activates the downlink secondary component carrier before or after transmitting the preamble signal to the eNB.
  • the deactivation timer since the deactivation timer is not used, the downlink member carrier is still in the active state during the backoff period of the UE due to the failure of receiving the random access response or the failure to receive the contention resolution message, as shown in the figure. 6 and Figure 7.
  • the UE does not need to listen to the PDCCH and PDSCH of the downlink secondary component carrier, and does not send the CQI on the corresponding uplink secondary component carrier. Therefore, activating the downlink secondary component carrier during this period may cause additional power waste. .
  • the method for processing the state of the component carrier includes the following steps:
  • Step S510 The UE sends a preamble signal to the base station, and performs random access on the secondary component carrier pair SCC1.
  • the UE If the random access is triggered by the eNB, after receiving the PDCCH order from the eNB, the UE sends a preamble to the eNB and listens for a response from the eNB.
  • the downlink secondary component carrier may be activated before or after transmitting the preamble signal to the base station, so that the PDCCH and the PDSCH can be monitored.
  • Step S520 Stop or ignore the deactivation timer of the downlink component carrier before the random access succeeds.
  • step S530 If the random access fails (NO in step S530), and the number of consecutive random access failures has not reached the predetermined threshold (NO in step S540), the backoff is performed, and the backoff is deactivated during the backoff period.
  • the downlink member carrier is described (step S550). After the backoff period has elapsed, the UE returns to step S510 to resend the preamble signal to the base station for the next random access.
  • the UE after transmitting the preamble signal to the eNB, the UE does not receive any random access response message within the random access response time window, or receives the random access response message within the random access response window, but the random If the access response message does not include the identifier of the preamble signal sent by the user equipment, it is considered that the receiving random access response fails, and thus
  • the downlink secondary component carrier is deactivated during the backoff period after the random access response time window. This deactivation can be triggered by the end of the random access response window.
  • the downlink secondary component carrier is activated after the back end of the backoff user equipment transmits the preamble signal again.
  • the downlink component carrier is deactivated during the backoff period after the contention resolution time window. . This deactivation can be triggered by a contention resolution timer timeout.
  • the downlink sub-component carrier is activated after the back-end end user equipment transmits the preamble again.
  • the method for processing the downlink member carrier state further includes the following steps:
  • step S530 If the random access is successful (YES in step S530), the deactivation timer of the downlink member carrier is turned on in step S570.
  • the UE when the random access is a contention-based random access procedure, after receiving the contention resolution message from the eNB, the UE starts the deactivation timer of the downlink secondary component carrier.
  • the random access is a non-contention random access procedure
  • the UE receives the PDCCH signaling indicating the uplink grant or downlink assignment of the secondary component carrier to the SCC1 on the downlink secondary component carrier, or from other members
  • the deactivation timer of the downlink sub-carrier is turned on.
  • the user terminal may resend the preamble signal to the eNB after a period of backoff. To request random access again.
  • the processing method of the component carrier state further includes:
  • step S530 If the random access fails this time (No in step S530) and the number of consecutive random access failures reaches a predetermined threshold (YES in step S540), the current secondary member is stopped.
  • stopping random access on the current secondary component carrier pair SCC1 may include: the UE stops performing random access, or the UE selects another component carrier pair (such as SCC2), and transfers to the other component carrier.
  • the random access procedure is re-executed on SCC2, as shown in FIG.
  • the step S560 can further save the power consumption of the UE, because: as shown in FIG. 8, if the UE does not deactivate the downlink sub-component carrier, the eNB cannot identify the UE, and therefore cannot pass the MAC.
  • the signaling is used to deactivate the downlink secondary component carrier of the UE, so that the downlink secondary component carrier of the UE is always activated, causing additional power waste.
  • a method for processing a carrier state includes the following steps: Each secondary carrier pair can each correspond to a time advance timer. When the corresponding time advance timer expires, the member carrier pair is deactivated. The downlink secondary component carrier, and stops or ignores the deactivation timer of the downlink secondary component carrier.
  • This method effectively avoids the problem that the random access process caused by the TAT is timed out and the deactivation timer is not turned off.
  • the method of this embodiment may be performed separately, or may be performed before and after any of the steps in Fig. 10, as in step S580 of Fig. 12.
  • steps S510 and S520 may be performed in parallel rather than in the order illustrated in the figures. Therefore, the order of execution of the methods described in the specification does not limit the technical scope of the present invention.
  • FIG. 13 is a block diagram showing the structure of a UE 100 in an embodiment of the present invention.
  • the UE 100 further includes: a transmitting unit 110, a receiving unit 120, a first-time control unit 130, and a first activation control unit 140.
  • the sending unit 110 is configured to send a preamble signal to the eNB on the uplink secondary component carrier of the secondary component carrier pair to request random access to the eNB.
  • the receiving unit 120 is configured to receive a response from the eNB on the downlink secondary component carrier of the secondary component carrier pair.
  • the first timing control unit 130 is configured to stop or ignore the deactivation timer of the downlink secondary component carrier before the random access succeeds.
  • the first activation control unit 140 is configured to activate the downlink secondary component carrier before or after the transmitting unit 110 transmits the preamble signal to the eNB.
  • the first timing control unit 130 may be further configured to enable the deactivation timer after the random access is successful.
  • the first activation control unit 140 may be further configured to: when the current random access fails, and the number of consecutive random access failures has not reached a predetermined threshold, the backoff period before the next random access The downlink secondary component carrier is deactivated.
  • the sending unit 110 is further configured to stop sending the preamble signal to the eNB on the current uplink secondary component carrier after the current random access fails, and the number of consecutive random access failures reaches a predetermined threshold;
  • the activation control unit 140 may also be configured to deactivate the downlink secondary component carrier after the current random access procedure fails.
  • the transmitting unit 110 may be further configured to send a preamble signal to the eNB on the uplink secondary component carrier of the reselected secondary component carrier pair.
  • the receiving unit 120 can also be configured to receive a response from the eNB on the downlink secondary component carrier of the reselected secondary component carrier pair.
  • the UE 100 may further include: a time advance timer (not shown) corresponding to the secondary member carrier pair.
  • the first activation control unit 140 can also be configured to deactivate the downlink secondary component carrier after the time advance timer expires.
  • the first timing control unit 130 may also be configured to stop or ignore the deactivation timer of the downlink secondary component carrier after the time advance timer expires.
  • a UE 200 is provided, the UE 200 including a time advance timer (not shown) corresponding to a secondary component carrier pair.
  • the member carrier pair is a pair of secondary component carriers including one uplink secondary component carrier and downlink secondary component carrier.
  • the UE further includes: a second timing control unit 230 and a second activation control unit 240.
  • the second activation control unit 240 is configured to deactivate the downlink secondary component carrier after the time advance timer expires.
  • the second timing control unit 230 is configured to stop after the time advance timer expires. The deactivation timer of the secondary component carrier is ignored or ignored.
  • the above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software.
  • the present invention also relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to implement the various components described above Method or step.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

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Description

载波聚合系统中载波状态的处理方法和用户设备 技术领域
本发明涉及无线通信技术, 更具体地, 涉及一种载波聚合系统中载 波状态的处理方法和用户设备。 背景技术
随着由 3GPP 启动的通用移动通信系统技术长期演进 (Long Term Evolution, LTE) 项目的冻结, 3GPP组织已经开始了对第四代移动通信 系统, 如对高级的长期演进系统 (LTE-Advanced, LTE-A)的研究。 为了满 足 ITU提出的针对 4G系统的下行 lGbps, 上行 500Mbps的高数据速率 要求, 3GPP在 LTE-A中提出了载波聚合技术以支持能够提供所述高数据 速率要求的带宽值。 载波聚合技术可以把不同频段的多个载波聚合起来 组成最大 100M的带宽, 使 LTE-A的用户设备 (user equipment, UE, 也 称为移动终端、 移动台等) 可以在多个载波上接收和 /或发送数据, 从而 使发送或接收数据的带宽大于 20M。
在载波聚合技术中, 每个聚合的载波称为一个成员载波 (component carrier, CC)。 基站( Evolved NodeB, 简称为 eNB)可以根据 UE的业务 需求为 UE 配置多个成员载波。 其中一个成员载波定义为主成员载波 (Primary CC, PCC ), 其余的成员载波定义为次成员载波 (Secondary CC, SCC)。考虑到 UE业务量的动态变化, 为了更好的节省 UE的功率, 对下行次成员载波引入了激活 /去激活的操作。 即 eNB可以根据 UE的下 行业务量, 控制 UE对下行次成员载波执行激活和去激活的操作。 当 UE 去激活一个下行次成员载波后, UE就不需要再进行下面的操作: (1)监听 该成员载波的物理下行控制信道 (Physical Downlink Control Channel, PDCCH) ; (2)监听该成员载波的物理下行共享信道 (Physical Downlink Share Channel, PDSCH); (3)反馈该成员载波的信道质量信息(Channel Quality Information, CQI)。 而当 UE激活一个下行次成员载波后, UE需 要执行上面(1 )、 (2) 和 (3 ) 的操作。 目前的协议中定义了两种下行次 成员载波的激活 /去激活方式:
方式一: eNB通过媒体接入控制层 (MediumAccess Control, MAC) 信令控制 UE激活 /去激活每个下行次成员载波。
方式二: UE为每个次成员载波建立一个去激活定时器。在下面三种 条件下 UE会开启 (包括重启) 下行次成员载波相应的去激活定时器。
( 1 ) UE接收到一个 MAC信令要求激活该下行次成员载波;
(2) UE在该下行次成员载波上接收到 PDCCH信令, 该 PDCCH 信令指示调度次成员载波在物理上行共享信道 (Physical Uplink Control Channel, PUSCH)上传输上行数据或在 PDSCH 上接收下行数据;
(3 ) UE在其他成员载波上接收到 PDCCH信令, 该 PDCCH信令 指示调度该下行次成员载波在其 PDSCH上接收下行数据。 在相应的去激活定时器计时期间, UE会一直使该下行次成员载波处 于激活状态。 当相应的去激活定时器计时超时后, UE会去激活该次成员 载波。
此外, 目前业界还存在一种正在讨论的去激活下行次成员载波的方 式: 当时间提前定时器 (Time Advance Timer, TAT) 计时超时后, UE去 激活其所有的处于激活状态的下行次成员载波。
为了保持 UE的上行同歩, eNB每隔一段时间会给 UE发送一个时间 同歩调整命令 (Time Advance Command, TAC)。 UE会维持一个用于上 行同歩过程的 TAT。 每当收到一个 TAC后, UE会重启该 TAT。 如果在 TAT计时超时后 UE仍然没有收到 TAC,意味着 UE已经丢掉了上行同歩。 在进行上下行数据通信前, UE需要首先执行随机接入过程来获得上行同 在目前的 Rel-10中, 虽然会配置多个成员载波, 但是所有配置的成 员载波可以只用一个上行同歩过程, 即上行同歩的建立和上行同歩的维 持只需要在主成员载波上进行。 只要主成员载波处于上行同歩状态, 其 余所有次成员载波的上行同歩都可以保证。 因此目前的 Rel-10中, 用于 建立上行同歩的随机接入过程只在主成员载波上进行, 而次成员载波上 不会进行随机接入过程。 而在后续版本中, 由于不同的上行成员载波可 能会需要独立的上行同歩过程, 因此次成员载波上也需要进行随机接入 过程。
随机接入技术是移动通信系统中 UE与 eNB建立连接, 进行通信的 首要歩骤。随机接入的目的是使 UE与网络建立连接或使 UE获得上行同 歩。 LTE 系统中, 随机接入过程可分为基于竞争的随机接入和基于非竞 争的随机接入, 基于非竞争的随机接入过程一般用于有下行数据到达而 UE没有获得上行同歩,切换和定位三种场景。此时 eNB可以通过 PDCCH 命令(PDCCH order)或者切换命令为 UE指定随机接入使用的前导信号 (preamble) 资源, 从而避免该 UE与其它 UE选择相同的资源而发生冲 突。 基于竞争的随机接入过程可适用于所有需要发起随即接入的过程。 除了上述三种场景外, 还包括 RRC初始连接建立, RRC连接重建和有上 行数据到达而 UE没有获得上行同歩。随机接入过程可以由 eNB触发(如 通过 PDCCH order来触发 )或者由 UE自己(如通过 MAC子层 )来触发, 图 1是现有技术中由 UE发起的基于竞争的随机接入的流程示意图。如图 1所示, 该过程可分为如下歩骤:
歩骤 S101 , 发送前导信号 (Preambled 前导信号由唯一的标识符 RAPID来进行标识。 UE可在选定的时频资源上发送选定的前导信号。
如果随机接入是由 eNB发起的, 则在该歩骤之前, 还包括由 eNB进 行触发的歩骤 (未示出), 如 eNB向 UE发送用于触发随机接入的消息, 如 PDCCH order。
歩骤 SI 02,接收来自 eNB的随机接入响应(random access response, RAR)0 RAR 是一个多播消息, 选择了同样的时频资源发送前导信号的 UE都可以接收到该消息, 因此 UE在接收到 RAR后还要检测该 RAR中 是否含有匹配的 RAPID, 如果 RAR中含有 RAPID, 则 UE认为 RAR接 收成功。 如果没有接收到 RAR, 或接收到的 RAR中不含有 RAPID, 则 UE认为随机接入失败。
歩骤 S103 , 向 eNB发送上行数据(即 Msg3 ), 该上行数据可包括该 UE的小区无线网络临时标识符 (C-RNTI) 和其它信息。 歩骤 S104, UE接收到来自 eNB的竞争解决消息 (即 Msg4), 随机 接入成功。
对于基于非竞争的随机接入, UE在向 eNB发送了前导信号, 并接 收到了来自 eNB的随机接入响应后,会进一歩监听到来自 eNB的指示了 上行授权或下行分配的 PDCCH信令。
上述可知, 现有技术中并没有涉及在次成员载波上的随机接入, 更 没有人关注和解决现有的下行次成员载波的去激活方式给次成员载波上 的随机接入带来的问题。 发明内容
本发明致力于提供一种载波聚合系统中载波状态的处理方法和用户 设备, 用以克服因现有技术的局限而存在一种或更多种缺点, 至少提供 一种有益的选择。
根据本发明的第一方面, 提供了一种载波聚合系统中载波的状态处 理方法, 该方法包括: 在次成员载波对上进行随机接入; 以及在随机接 入成功之前, 停止或忽略该次成员载波对中下行次成员载波的去激活定 时器。
根据本发明的第二方面, 还提供了一种载波聚合系统中载波的状态 处理方法, 该方法包括: 如果次成员载波对对应的时间提前定时器超时, 去激活该次成员载波对中的下行次成员载波, 并停止或忽略该下行次成 员载波的去激活定时器。
根据本发明的第三方面, 还提供了一种用户设备, 该用户设备包括: 发送单元, 其用于在次成员载波对的上行次成员载波上向基站发送前导 信号, 以向所述基站请求随机接入; 接收单元, 用于在该次成员载波对 的下行次成员载波上接收来自所述基站的响应; 以及定时控制单元, 其 用于在所述随机接入成功之前, 停止或忽略所述下行次成员载波的去激 活定时器。
根据本发明的第四方面, 还提供了一种用户设备, 该用户设备包括: 与次成员载波对对应的时间提前定时器; 激活控制单元, 其用于在所述 时间提前定时器超时后, 去激活所述次成员载波对中的下行次成员载波; 以及定时控制单元, 其用于在所述时间提前定时器超时后, 停止或忽略 所述下行次成员载波的去激活定时器。
根据本发明的第一方面, 避免了在次成员载波上进行随机接入时, 出现由于下行次成员载波去激活定时器的超时而导致随机接入过程无法 正常进行的问题。
根据本发明的第二方面, 避免了现有的通过时间提前定时器超时去 激活成员载波的方式所可能导致的随机接入过程无法正常进行的问题。
根据本发明的第三方面, 避免了在次成员载波上进行随机接入时, 出现由于下行次成员载波去激活定时器的超时而导致随机接入过程无法 正常进行的问题。
根据本发明的第四方面, 避免了现有的通过时间提前定时器超时去 激活成员载波的方式所可能导致的随机接入过程无法正常进行的问题。
为了实现前述和相关目的, 本发明包括此后充分描述并且在权利要 求中具体指出的特征。 以下描述和附图详细地阐述了本发明的特定示例 性实施方式。 然而, 这些实施方式仅仅表示可以使用本发明的原理各种 方式中的几个。 根据本发明的结合附图所考虑的以下详细描述, 本发明 的其他目的、 优点和新颖特征将变得清楚。 附图说明
附图中, 采用相同或对应的附图标记来表示全部附图中相同的或对 应的组成部分, 并且可以用来表示一个以上实施方式中的相同的或对应 的组成部分。 附图仅仅是本发明的一些实施例, 对于本领域普通技术人 员来讲, 在不付出创造性劳动性的前提下, 还可以根据这些附图获得其 他的附图。 在附图中:
图 1为现有技术中基于竞争的随机接入流程图示意图;
图 2示出了按照现有的次成员载波的激活 /去激活方式的在次成员载 波上进行随机接入的场景;
图 3和图 4示出了在图 2所示的场景中存在的由于去激活定时器超 时而导致的随机接入失败;
图 5示出了本发明的一个示例性实施方式中次成员载波状态的处理 方法的流程图;
图 6和图 7示出了本发明的一个示例性实施方式中随机接入失败时 的退避机制;
图 8示出了本发明的一个示例性实施方式中由于随机接入失败而停 止再次进行随机接入的场景;
图 9示出了本发明的一个示例性实施方式中由于随机接入失败而重 新选择次成员载波进行随机接入的场景;
图 10示出了本发明的另一个示例性实施方式中次成员载波状态的处 理方法的流程图;
图 11示出了基于目前正在讨论的 TAT去激活方式的、次成员载波上 的随机接入可能导致的随机接入失败的场景;
图 12示出了本发明的另一个示例性实施方式中次成员载波状态的处 理方法的流程图;
图 13示出了本发明的一个示例性实施方式中用户设备的框图示例; 以及
图 14 示出了本发明的另一个示例性实施方式中用户设备的框图示 例。 具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案 进行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实 施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术 人员在没有作出创造性劳动前提下所获得的所有其他实施例, 都属于本 发明保护的范围。
在此需要说明的是, 为了避免因不必要的细节而模糊了本发明, 在 附图中仅仅示出了与根据本发明的方案密切相关的设备结构和 /或处理歩 骤, 而省略了与本发明关系不大的其他细节。 在本发明实施例中, 提出了在次成员载波上进行随机接入时, 对次 成员载波中的下行次成员载波的状态的有效的处理方案, 以尽量减少在 次成员载波上进行随机接入时的失败。
在实现本发明的过程中, 发明人发现: 如果在利用次成员载波进行 随机接入的过程中使用下行次成员载波的去激活定时器, 那么按照前面 所述的次成员载波激活去激活方式二中的(2), UE将在接收到来自 eNB 的随机接入响应后开启下行次成员载波相应的去激活定时器, 如图 2所 假设该随机接入过程为基于竞争的随机接入过程, 如果发生多个 UE 的前导信号碰撞, 那么随机接入过程有可能会失败。 UE检测随机接入过 程失败的方法有三种: (1 ) 在发送完前导信号之后, 在一个时间窗 (下 文称为随机接入响应时间窗) 内没有接收到来自 eNB的随机接入响应消 息; (2) 在发送完前导信号之后, 在随机接入响应时间窗内接收到了来 自 eNB的随机接入响应消息, 但是该消息中不包含该 UE发送的前导信 号的识别符 RAPID, 即该随机接入响应消息并不是该 UE的随机接入响 应消息; (3 )在发送完 Msg3后, 开启竞争解决定时器, 在该竞争解决定 时器超时前没有收到来自 eNB的竞争解决消息。
在上述随机接入失败的情况中, 情况 (1 )、 (2 ) 都属于接收随机接 入响应失败, 情况 (3 ) 为接收竞争解决消息失败。
UE在发现随机接入过程失败后会采用退避(backoff)机制, 在经过 一段退避期后再次发起随机接入过程。 退避期参数可以事先存储在 UE 中, 也可以携带在来自 eNB的信令 (如随机接入响应或其它消息) 中。 在这种情况下,如果 UE在前一次的随机接入过程中,在收到随机接入响 应消息后开启去激活定时器, 而在再次发起的随机接入过程中, 如果去 激活定时器在发送完前导信号之后, 收到 eNB的随机接入响应之前计时 超时, 那么 UE会停止监听 PDCCH, 造成无法正常接收随机接入响应消 息, 从而使得随机接入过程失败, 如图 3和图 4所示。
因此, 在次成员载波上进行随机接入的过程中, 如果按照现有的对 下行次成员载波的激活 /去激活方式来开启去激活定时器, 会存在由于下 行次成员载波去激活定时器的超时而导致随机接入过程无法正常进行的 问题, 下面会将该问题称为问题 1。
此外, 目前业界正在讨论的去激活成员载波的方法, 虽然提出了当
TAT计时超时后, UE去激活其所有的处于激活状态的次成员载波,但是, 并没有规定在由于 TAT超时而对下行次成员载波去激活后, 是否停止相 应的去激活定时器。
如果不停止该去激活定时器, 那么会存在如图 11 所示的问题。 UE 在发起随机接入过程后, 如果去激活定时器在发送完前导信号之后, 收 到 eNB的随机接入响应之前计时超时, 那么 UE会停止监听 PDCCH, 造 成无法正常接收随机接入响应消息, 从而使得随机接入过程失败。
也就是说, 目前正在讨论的基于 TAT的去激活方式, 在次成员载波 上进行随机接入时, 可能会存在由于 TAT定时器的超时而导致随机接入 过程无法正常进行的问题, 下面会将该问题称为问题 2。
针对如上问题 1和问题 2而提出了本发明的实施方式。
为了解决问题 1,即防止由于随机接入过程中开启去激活定时器而可 能造成的随机接入失败, 在本发明的一个实施例中, 如图 5所示, 对成 员载波状态的处理方法包括如下歩骤:
歩骤 S510, 在次成员载波对上进行随机接入。
该次成员载波对(如次成员载波对 SCC1 )包括一个上行次成员载波 和一个下行次成员载波。 该随机接入可以是由 eNB发起 (如 eNB向 UE 发送 PDCCH order), 也可以由 UE发起 (如 MAC层触发)。 UE在接收 到来自 eNB的 PDCCH order后, 或受到自己 MAC层的触发后, 在上行 次成员载波上向 eNB发送用于随机接入的前导信号, 并在下行次成员载 波上监听来自 eNB的响应。 在次成员载波对上进行随机接入时, 可在向 基站发送前导信号之前或之后, 激活下行次成员载波, 以可以监听
PDCCH和 PDSCH。
歩骤 S520, 在随机接入成功之前, 停止或忽略下行次成员载波的去 激活定时器。
在本文中, 停止下行次成员载波的去激活定时器是指使不开启下行 次成员载波的去激活定时器, 忽略下行次成员载波的去激活定时器是指: 即使下行次成员载波的去激活定时器开启, 也不会响应下行次成员载波 的去激活定时器的超时而进行任何动作, 即, 将下行次成员载波的去激 活定时器被视为停止。 因此, 本发明实施例中, 在随机接入成功之前, 不使用该下行次成员载波的去激活定时器。
例如, 在一个示例中, 在发起随机接入时, 如果下行次成员载波处 于去激活状态并且该随机接入过程由 UE发起,那么当 UE发送前导信号 后隐式地激活该下行次成员载波, 但是并不开启相应的去激活定时器, 而使去激活定时器处于停止状态。 如果此时下行次成员载波的去激活定 时器已经处于开启状态, 则停止该去激活定时器, 或者忽略该去激活定 时器 (不响应该去激活计时的超时)。
此外, 在发起随机接入时, 如果下行次成员载波处于去激活状态并 且该随机接入过程是由 eNB发起的随机接入过程, 那么当 UE接收到来 自 eNB的 PDCCH order后隐式地激活该下行次成员载波, 但是并不开启 相应的去激活定时器, 而使去激活定时器处于停止状态。 如果此时下行 次成员载波的去激活定时器已经处于开启状态, 则停止该去激活定时器, 或者忽略该去激活定时器。
此外, 在发起随机接入时, 如果下行次成员载波处于激活状态, 并 且该随机接入过程由 UE发起, 则保持该激活状态, 并在 UE发送前导信 号后停止或忽略去激活定时器。
此外, 在发起随机接入时, 如果下行次成员载波处于激活状态, 并 且该随机接入过程由 eNB发起, 则保持该激活状态, 并在 UE接收到来 自 eNB的 PDCCH order后停止或忽略该下行次成员载波相应的去激活定 时器。
如上激活和停止去激活定时器的情况仅为示例, 本发明并不限于上 述示例, 例如, 还可以在进行随机接入时, 无论是由 UE发起还是由 eNB 发起,都可以在 UE发送前导信号后激活下行次成员载波,并停止或忽略 去激活定时器。
本实施例中, 通过在进行随机接入期间不使用下行次成员载波的去 激活定时器, 与在随机接入期间使用去激活定时器相比, 有效地避免了 由于下行次成员载波去激活定时器的超时而导致的随机接入失败, 因此 减少了随机接入失败的可能性。
在如上实施例中, 在进行随机接入时, 下行次成员载波是处于激活 状态, 这是由于 UE在向 eNB发送前导信号之前或之后, 激活了下行次 成员载波。 在这种情况下, 由于不使用去激活定时器, 则在由于接收随 机接入响应失败或接收竞争解决消息失败而导致的 UE的退避期内,下行 次成员载波会依然处于激活状态, 如图 6和图 7所示。 在该退避期内, UE没有必要监听该下行次成员载波的 PDCCH和 PDSCH, 也不会在对 应的上行次成员载波上发送 CQI, 因此这段时间内激活下行次成员载波 会造成额外的功率浪费。
因此, 在另一实施例中, 如图 10所示, 对成员载波状态的处理方法 包括如下歩骤:
歩骤 S510, UE向基站发送前导信号,在次成员载波对 SCC1上进行 随机接入。
如果该随机接入是由 eNB 触发的, 贝 I」 UE在接收到来自 eNB 的 PDCCH order后, 向 eNB发送前导信号, 并监听来自 eNB的响应。 在次 成员载波对上进行随机接入时, 可在向基站发送前导信号之前或之后, 激活下行次成员载波, 以可以监听 PDCCH和 PDSCH。
歩骤 S520, 在随机接入成功之前, 停止或忽略下行次成员载波的去 激活定时器。
如果本次随机接入失败 (歩骤 S530 中的否), 并且连续的随机接入 失败的次数尚未达到预定的阈值 (歩骤 S540中的否), 则进行退避, 在 退避期内去激活所述下行次成员载波 (歩骤 S550)。 在经过该退避期后, UE返回歩骤 S510, 重新向基站发送前导信号, 进行下一次随机接入。
例如, UE在向 eNB发送前导信号后, 如果在随机接入响应时间窗 内没有收到任何随机接入响应消息, 或者虽然在随机接入响应窗口内收 到随机接入响应消息, 但该随机接入响应消息中并没有包含该用户设备 之前发送的前导信号的识别符, 则认为接收随机接入响应失败, 于是在 该随机接入响应时间窗之后的退避期内去激活下行次成员载波。 该去激 活可以由随机接入响应窗口结束来触发。 直到退避结束用户设备再次发 送前导信号后激活所述下行次成员载波。 或者, 在向 eNB发送携带 UE 的 C-RNTI的消息后, 如果在竞争解决时间窗内没有接收到来自 eNB的 竞争解决消息, 则在竞争解决时间窗之后的退避期内去激活下行次成员 载波。 该去激活可以由竞争解决计时器超时来触发。 直到退避结束用户 设备再次发送前导信号后激活该下行次成员载波。
通过在退避期内去激活下行成员载波, 可以节约 UE的功率消耗。 此外, 在本发明实施方式中, 如图 10所示, 对下行次成员载波状态 的处理方法还包括如下歩骤:
如果随机接入成功(歩骤 S530中的是), 则在歩骤 S570开启下行次 成员载波的去激活定时器。
具体地, 例如, 当所述随机接入为基于竞争的随机接入过程时, UE 在接收到来自 eNB的竞争解决消息后, 开启该下行次成员载波的去激活 定时器。当所述随机接入为非竞争的随机接入过程时, 当 UE在下行次成 员载波上接收到指示调度该次成员载波对 SCC1 的上行授权或下行分配 的 PDCCH信令时,或从其他成员载波上接收到指示调度该下行次成员载 波的下行分配的 PDCCH信令时, 开启该下行次成员载波的去激活定时 器°
如前所述, 在随机接入响应时间窗内接收随机接入响应失败或在竞 争解决时间窗内接收竞争解决消息失败后, 用户终端会在经过一段退避 期后, 重新向 eNB发送前导信号, 以再次请求随机接入。 在本发明一实 施例中, 如果在一次随机接入过程中, 如果随机接入失败, 且 UE向 eNB 发送前导信号的次数超过最大次数 (即连续的随机接入失败的次数已经 达到预定的阈值), UE会停止在次成员载波对 SCC1上进行随机接入过 程的尝试, 并对该下行次成员载波进行去激活。 因此, 对成员载波状态 的处理方法还包括:
如果本次随机接入失败(歩骤 S530中的否) 并且, 连续的随机接入 失败的次数达到预定的阈值 (歩骤 S540 中的是), 则停止在当前次成员 载波对 SCCl 上进行随机接入, 对下行次成员载波进行去激活 (歩骤 S560)o
歩骤 S560中, 停止在当前次成员载波对 SCC1上进行随机接入例如 可以包括: UE停止进行随机接入, 或者, UE选择另外成员载波对 (如 SCC2), 并转到该另外的成员载波对 SCC2上重新进行随机接入过程, 如 图 10所示。
该歩骤 S560可以进一歩节省 UE的功率消耗, 这是由于: 如图 8所 示, 如果 UE不对该下行次成员载波进行去激活, 则由于 eNB无法识别 出该 UE, 因此也就无法通过 MAC信令来去激活 UE的该下行次成员载 波,这样就会到导致 UE的该下行次成员载波一直处于激活状态,造成额 外的功率浪费。
为了解决前面提出的问题 2, 即为了避免通过 TAT计时器超时来去 激活成员载波的方式所可能导致的随机接入失败, 在本发明另一实施例 中, 还提供了这样的对下行次成员载波状态的处理方法, 该方法包括如 下歩骤: 每个次成员载波对可以各对应一个时间提前定时器, 当该次成 员载波对对应的时间提前定时器超时后, 去激活该次成员载波对中的下 行次成员载波, 并停止或忽略该下行次成员载波的去激活定时器。 本方 法有效避免了在 TAT的计时超时, 不关闭去激活定时器所导致的随机接 入过程无法正常进行的问题。 该实施例的方法可以单独地执行, 也可以 在图 10中任意歩骤的之前和之后执行, 如图 12中的歩骤 S580。
在此需要说明的是, 本发明的方法歩骤不限于按照说明书中描述的 时间顺序来执行, 也可以按照其他的时间顺序地、 并行地或独立地执行。 例如歩骤 S510和 S520可以并行的执行而不现定于图中示出的顺序。 因 此, 本说明书中描述的方法的执行顺序不对本发明的技术范围构成限制。
图 13示出了本发明一实施例中 UE 100的结构框图。 除了常规的结 构 (未示出) 外, 该 UE 100还包括: 发送单元 110、 接收单元 120、 第 一定时控制单元 130和第一激活控制单元 140。
发送单元 110用于在次成员载波对的上行次成员载波上向 eNB发送 前导信号, 以向 eNB请求随机接入。 接收单元 120用于在该次成员载波对的下行次成员载波上接收来自 eNB的响应。
第一定时控制单元 130用于在随机接入成功之前, 停止或忽略下行 次成员载波的去激活定时器。
第一激活控制单元 140用于在发送单元 110向 eNB发送前导信号之 前或之后, 激活下行次成员载波。
优选地, 第一定时控制单元 130还可以被配置为在随机接入成功后, 开启去激活定时器。
优选地, 第一激活控制单元 140还可以被配置为: 在本次随机接入 失败, 并且连续的随机接入失败的次数尚未达到预定的阈值时, 在进行 下一次随机接入之前的退避期内去激活所述下行次成员载波。
优选地, 发送单元 110还可以被配置为在本次随机接入失败, 并且 连续的随机接入失败的次数达到预定的阈值后, 停止在当前上行次成员 载波上向 eNB发送前导信号; 第一激活控制单元 140还可以被配置为在 本次随机接入过程失败后, 去激活下行次成员载波。 此时, 发送单元 110 还可以被配置为在重新选择的次成员载波对的上行次成员载波上向 eNB 发送前导信号。 接收单元 120还可以被配置为在重新选择的次成员载波 对的下行次成员载波上接收来自 eNB的响应。
优选地, UE 100还可以包括: 与该次成员载波对对应的时间提前定 时器 (未示出)。
第一激活控制单元 140还可以被配置为在该时间提前定时器超时后, 去激活下行次成员载波。 第一定时控制单元 130还可以被配置为在该时 间提前定时器超时后, 停止或忽略下行次成员载波的去激活定时器。
在本发明另一实施例中, 如图 14所示, 提供了一种 UE 200, 该 UE 200包括与次成员载波对对应的时间提前定时器 (未示出)。 该成员载波 对是包括一个上行次成员载波和下行次成员载波的一对次成员载波。
此外, UE还包括:第二定时控制单元 230和第二激活控制单元 240。 第二激活控制单元 240用于在该时间提前定时器超时后, 去激活下行次 成员载波。 第二定时控制单元 230用于在该时间提前定时器超时后, 停 止或忽略次成员载波的去激活定时器。
应当理解, 上述的各部件可以通过硬件、 软件、 固件或者它们的组 合来实现。 并且, 上述各个部分可以结合为更大的部件, 也可以拆分为 多个更小的部件。
本发明以上的装置和方法可以由硬件实现, 也可以由硬件结合软件 实现。 本发明还涉及这样的计算机可读程序, 当该程序被逻辑部件所执 行时, 能够使该逻辑部件实现上文所述的装置或构成部件, 或使该逻辑 部件实现上文所述的各种方法或歩骤。 本发明还涉及用于存储以上程序 的存储介质, 如硬盘、 磁盘、 光盘、 DVD、 flash存储器等。
尽管以上已经针对几个例示的实施方式中的仅一个或更多个描述了 本发明的具体特征, 但是可以根据需要以及从对任意给定或具体应用有 利的方面考虑, 将这种特征与其他实施方式的一个或更多个其他特征相 人
口 。
最后, 还需要说明的是, 术语"包括"、 "包含 "或者其任何其他变体意 在涵盖非排他性的包含, 从而使得包括一系列要素的过程、 方法、 物品 或者设备不仅包括那些要素, 而且还包括没有明确列出的其他要素, 或 者是还包括为这种过程、 方法、 物品或者设备所固有的要素。
以上虽然结合附图详细描述了本发明的实施例, 但是应当明白, 上 面所描述的实施方式只是用于说明本发明, 而并不构成对本发明的限制。 对于本领域的技术人员来说, 可以对上述实施方式作出各种修改和变更 而没有背离本发明的实质和范围。 因此, 本发明的范围仅由所附的权利 要求及其等效含义来限定。

Claims

权 利 要 求 书
1、 一种载波聚合系统中载波的状态处理方法, 其特征在于, 该方法 包括:
在次成员载波对上进行随机接入; 以及
在所述随机接入成功之前, 停止或忽略所述次成员载波对中下行次 成员载波的去激活定时器。
2、 根据权利要求 1所述的方法, 其特征在于, 所述方法还包括: 在向基站发送前导信号之前或之后, 激活所述下行次成员载波。
3、 根据权利要求 1所述的方法, 其特征在于, 所述方法还包括: 在所述随机接入成功后, 开启所述去激活定时器。
4、 根据权利要求 2所述的方法, 其特征在于, 所述方法还包括: 如果本次随机接入失败, 并且连续的随机接入失败的次数尚未达到 预定的阈值, 则在经过一段退避期后进行下一次随机接入, 在所述退避 期内去激活所述下行次成员载波。
5、 根据权利要求 2所述的方法, 其特征在于, 所述方法还包括: 如果本次随机接入失败并且, 连续的随机接入失败的次数达到预定 的阈值, 则停止在所述次成员载波对上的随机接入, 去激活所述下行次 成员载波。
6、 根据权利要求 5所述的方法, 其特征在于, 所述方法还包括: 重新选择成员载波对, 并在重新选择的成员载波对上进行随机接入。
7、 根据权利要求 2所述的方法, 其特征在于, 所述方法还包括: 如果所述次成员载波对对应的时间提前定时器超时, 去激活所述下 行次成员载波, 并停止或忽略所述下行次成员载波的去激活定时器。
8、 根据权利要求 2所述的方法, 其特征在于, 在向基站发送前导信 号之前或之后, 激活所述下行次成员载波的歩骤包括:
在接收到来自基站的用于触发所述随机接入的消息后, 如果所述下 行次成员载波处于去激活状态, 则激活所述下行次成员载波, 如果所述 下行次成员载波处于激活状态, 则保持所述下行次成员载波的激活状态; 或者
在向基站发送所述前导信号后, 如果所述下行次成员载波处于去激 活状态, 则激活所述下行次成员载波, 如果所述下行次成员载波处于激 活状态, 则保持所述下行次成员载波的激活状态。
9、 根据权利要求 3所述的方法, 其特征在于, 在所述随机接入成功 后, 开启所述去激活定时器的歩骤包括:
在接收到来自基站的竞争解决消息后, 开启所述去激活定时器; 或 者
当在所述下行次成员载波上接收到指示所述次成员载波对的上行授 权或下行分配的物理下行控制信道 PDCCH信令时,或当从其他成员载波 上接收到指示该下行次成员载波的下行分配的 PDCCH信令时,开启所述 去激活定时器。
10、 根据权利要求 4所述的方法, 其特征在于, 所述随机接入失败 包括:
在向基站发送所述前导信号后, 在随机接入响应时间窗内接收随机 接入响应失败; 或者
在向所述基站发送携带用户设备的小区无线网络临时标识符的消息 后, 在竞争解决时间窗内接收来自所述基站的竞争解决消息失败。
11、 一种载波聚合系统中载波的状态处理方法, 其特征在于, 所述 方法包括:
如果次成员载波对对应的时间提前定时器超时, 去激活所述次成员 载波对中的下行次成员载波, 并停止或忽略所述下行次成员载波的去激 活定时器。
12、 根据权利要求 11所述的方法, 其特征在于, 所述方法还包括: 在所述次成员载波对上进行随机接入; 以及
在所述随机接入成功之前, 停止或忽略所述下行次成员载波的去激 活定时器。
13、 根据权利要求 12所述的方法, 其特征在于, 所述方法还包括: 在向基站发送所述前导信号之前或之后, 激活所述下行次成员载波。
14、 根据权利要求 12所述的方法, 其特征在于, 所述方法还包括: 在所述随机接入成功后, 开启所述去激活定时器。
15、 根据权利要求 13所述的方法, 其特征在于, 所述方法还包括: 如果本次随机接入失败并且连续的随机接入失败的次数尚未达到预 定的阈值, 则在经过一段退避期后进行下一次随机接入, 在所述退避期 内去激活所述下行次成员载波。
16、 根据权利要求 13所述的方法, 其特征在于, 所述方法还包括: 如果本次随机接入失败, 并且连续的随机接入失败的次数达到预定 的阈值, 则停止在所述次成员载波对上的随机接入, 去激活所述下行次 成员载波。
17、 根据权利要求 16所述的方法, 其特征在于, 所述方法还包括: 重新选择成员载波对, 并在重新选择的成员载波对上进行随机接入。
18、 一种用户设备, 其特征在于, 该用户设备包括:
发送单元, 其用于在成员载波对的上行次成员载波上向基站发送前 导信号, 以向所述基站请求随机接入;
接收单元, 用于在所述成员载波对的下行次成员载波上接收来自所 述基站的响应; 以及
定时控制单元, 其用于在所述随机接入成功之前, 停止或忽略所述 下行次成员载波的去激活定时器。
19、 根据权利要求 18所述的用户设备, 其特征在于, 所述用户设备 还包括:
激活控制单元, 其用于在所述发送单元向所述基站发送所述前导信 号之前或之后, 激活所述下行次成员载波。
20、 根据权利要求 18所述的用户设备, 其特征在于, 所述定时控制 单元还被配置为在所述随机接入成功后, 开启所述去激活定时器。
21、 根据权利要求 19所述的用户设备, 其特征在于, 所述激活控制 单元还被配置为: 在本次随机接入失败并且连续的随机接入失败的次数 尚未达到预定的阈值时, 在进行下一次随机接入之前的退避期内去激活 所述下行次成员载波。
22、 根据权利要求 19所述的用户设备, 其特征在于, 所述发送单元 还被配置为在本次随机接入失败, 并且连续的随机接入失败的次数达到 预定的阈值后, 停止在所述上行次成员载波上向基站发送前导信号; 并 且
所述激活控制单元还被配置为在本次随机接入失败后, 去激活所述 下行次成员载波。
23、 根据权利要求 22所述的用户设备, 其特征在于, 所述发送单元 还被配置为在重新选择的成员载波对的上行成员载波上向所述基站发送 前导信号; 并且
所述接收单元还被配置为在重新选择的成员载波对的下行成员载波 上接收来自所述基站的响应。
24、 根据权利要求 19所述的用户设备, 其特征在于, 所述用户设备 还包括: 与所述次成员载波对对应的时间提前定时器;
所述激活控制单元还被配置为在所述时间提前定时器超时后, 去激 活所述下行次成员载波, 并且
所述定时控制单元还被配置为在所述时间提前定时器超时后, 停止 或忽略所述下行次成员载波的去激活定时器。
25、 一种用户设备, 其特征在于, 所述用户设备包括:
与次成员载波对对应的时间提前定时器;
激活控制单元, 其用于在所述时间提前定时器超时后, 去激活所述 次成员载波对中的下行次成员载波; 以及
定时控制单元, 其用于在所述时间提前定时器超时后, 停止或忽略 所述下行次成员载波的去激活定时器。
26、 根据权利要求 25所述的用户设备, 其特征在于, 所述用户设备 还包括:
发送单元, 其用于在所述次成员载波对中的上行次成员载波上向基 站发送前导信号, 以向所述基站请求随机接入; 以及
接收单元, 用于在所述下行次成员载波上接收来自所述基站的响应; 所述定时控制单元还被配置为在所述随机接入成功之前, 停止或忽 略所述下行次成员载波的去激活定时器。
27、 根据权利要求 26所述的用户设备, 其特征在于,
所述激活控制单元还被配置为在所述发送单元向所述基站发送所述 前导信号之前或之后, 激活所述下行次成员载波。
28、 根据权利要求 26所述的用户设备, 其特征在于, 所述定时控制 单元还被配置为: 在所述随机接入成功后, 开启所述去激活定时器。
29、 根据权利要求 27所述的用户设备, 其特征在于, 所述激活控制 单元还被配置为: 在本次随机接入失败并且连续的随机接入失败的次数 尚未达到预定的阈值时, 在进行下一次随机接入之前的退避期内去激活 所述下行次成员载波。
30、 根据权利要求 27所述的用户设备, 其特征在于,
所述发送单元还被配置为在所述在本次随机接入失败, 并且连续的 随机接入失败的次数达到预定的阈值时, 停止在所述上行次成员载波上 向所述基站发送前导信号; 并且
所述激活控制单元还被配置为在本次随机接入失败后, 去激活所述 下行次成员载波。
31、 根据权利要求 30所述的用户设备, 其特征在于,
所述发送单元还被配置为在重新选择的成员载波对的上行成员载波 上向所述基站发送前导信号; 并且
所述接收单元还被配置为在重新选择的成员载波对的下行成员载波 上接收来自所述基站的响应。
32、 一种计算机可读程序, 其中, 当在载波聚合系统中执行所述程 序时, 所述程序使得计算机在载波聚合系统中执行如权利要求 1-17中任 意一项所述的载波的状态处理方法。
33、 一种存储有计算机可读程序的存储介质, 其中, 所述计算机可 读程序使得计算机在载波聚合系统中执行如权利要求 1-17中任意一项所 述的载波的状态处理方法。
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103313375A (zh) * 2012-03-13 2013-09-18 中兴通讯股份有限公司 辅服务小区上的随机接入方法及用户设备
US20140010179A1 (en) * 2012-07-05 2014-01-09 Lg Electronics Inc. Method and apparatus of providing a proximity-based service for public safety
US11558870B2 (en) 2017-11-16 2023-01-17 Sharp Kabushiki Kaisha Method and device for processing carrier activation

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5446823B2 (ja) 2009-12-16 2014-03-19 ソニー株式会社 ハンドオーバのための方法、端末装置、基地局及び無線通信システム
CN103748943A (zh) * 2012-08-17 2014-04-23 华为技术有限公司 用户设备配对处理方法、网络侧设备和用户设备
US9380605B1 (en) * 2013-07-19 2016-06-28 Sprint Spectrum L.P. Allocating resources in a wireless communication system
KR102171117B1 (ko) * 2013-08-30 2020-10-29 삼성전자주식회사 패킷 송수신 방법 및 그에 따른 단말, 그에 따른 시스템
JP6920061B2 (ja) * 2015-01-08 2021-08-18 シャープ株式会社 端末装置、基地局装置、無線通信方法および集積回路
US20170265230A1 (en) * 2016-03-14 2017-09-14 Futurewei Technologies, Inc. System and Method for Random Access Backoffs
JP7092191B2 (ja) * 2017-11-16 2022-06-28 富士通株式会社 アクセス制御方法、装置及び通信システム
US10742569B2 (en) 2018-11-12 2020-08-11 Cisco Technology, Inc. Efficient network link status handling
WO2020117557A1 (en) * 2018-12-06 2020-06-11 Google Llc Base-station-initiated grant revoke

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100150082A1 (en) * 2008-12-11 2010-06-17 Electronics And Telecommunications Research Institute Terminal device of carrier aggregation based mobile communication system and buffer status reporting method thereof
CN101772182A (zh) * 2009-01-05 2010-07-07 大唐移动通信设备有限公司 随机接入的方法及设备

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101083609A (zh) * 2006-05-30 2007-12-05 华为技术有限公司 一种终端设备接入方法、系统及一种终端设备
US8682318B2 (en) * 2008-02-04 2014-03-25 Lg Electronics Inc. Method of performing random access after applying back-off
CN101646251B (zh) * 2008-08-07 2012-07-18 中兴通讯股份有限公司 随机接入过程和测量间隙冲突的处理方法
RU2558733C2 (ru) * 2009-11-19 2015-08-10 Интердиджитал Пэйтент Холдингз, Инк. Активация/деактивация компонентных несущих в системах с несколькими несущими
US9363059B2 (en) * 2010-04-02 2016-06-07 Acer Incorporated Method of handling component carrier activation and deactivation and communication device thereof
US8982805B2 (en) * 2010-04-09 2015-03-17 Acer Incorporated Activating component carriers by non-contention based random access procedure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100150082A1 (en) * 2008-12-11 2010-06-17 Electronics And Telecommunications Research Institute Terminal device of carrier aggregation based mobile communication system and buffer status reporting method thereof
CN101772182A (zh) * 2009-01-05 2010-07-07 大唐移动通信设备有限公司 随机接入的方法及设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
3GPP TS 36.300 V10.0.0, 30 June 2010 (2010-06-30), pages 49, 82 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103313375A (zh) * 2012-03-13 2013-09-18 中兴通讯股份有限公司 辅服务小区上的随机接入方法及用户设备
US20140010179A1 (en) * 2012-07-05 2014-01-09 Lg Electronics Inc. Method and apparatus of providing a proximity-based service for public safety
US9226274B2 (en) * 2012-07-05 2015-12-29 Lg Electronics Inc. Method and apparatus of providing a proximity-based service for public safety
US11558870B2 (en) 2017-11-16 2023-01-17 Sharp Kabushiki Kaisha Method and device for processing carrier activation

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