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CN107276735A - 使用载波聚合的移动通信系统中的方法和终端 - Google Patents

使用载波聚合的移动通信系统中的方法和终端 Download PDF

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Publication number
CN107276735A
CN107276735A CN201710591316.6A CN201710591316A CN107276735A CN 107276735 A CN107276735 A CN 107276735A CN 201710591316 A CN201710591316 A CN 201710591316A CN 107276735 A CN107276735 A CN 107276735A
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subframe
information
scell
secondary cell
terminal
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CN201710591316.6A
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CN107276735B (zh
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张宰赫
金成勋
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
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Abstract

公开了使用载波聚合(CA)的移动通信系统中的方法和终端,其中所述方法包括:由终端从基站接收用于激活副小区的控制信息;由终端在第一子帧中发送包括用于所述副小区的信道状态信息(CSI)的第一信息;和由终端在不早于所述第一子帧的时候发送包括用于所述副小区的探测参考信号的第二信息。

Description

使用载波聚合的移动通信系统中的方法和终端
本申请是申请日为2012年02月20日、申请号为201280018872.x、发明名称为“使用载波聚合的时分双工移动通信系统中激活或停用副载波的方法和装置”的发明专利申请的分案申请。
技术领域
本发明涉及时分双工(TDD)无线通信系统。更具体地,本发明涉及在通过载波聚合(CA)技术而同时使用多载波的时分双工长期演进(LTE TDD)系统中的主载波和副载波的激活或者停用。
背景技术
随着无线通信技术的飞速发展,通信系统已经跨代发展。一个示例是长期演进(LTE)系统,其被开发作为第四代系统LTE。LTE系统采用了多种技术,以满足业务需求的快速增长。LTE系统采用这样一种技术是载波聚合(CA)。载波聚合是指增加在用户设备(UE)和演进节点B(eNB)之间的通信所用的载波的数量的一种技术。例如,载波聚合将所使用的载波的数量从如现有技术中所公开的一个载波增加为主载波以及一个或者多个副载波。在UE和eNB之间的通信中使用的载波的数量的该种增加将传输的量增加了副载波的数量。在LTE技术中,在其中主载波伺服(served)的小区被称为主小区(PCell),并且在其中副载波伺服的小区被称为副小区(SCell)。
当使用载波聚合时,PCell具有用于控制SCell的额外的复杂度。即,可以做出关于在特定的PCell处是否使用SCell的确定,可以确定用于激活和停用SCell的条件,以及可以监视激活和停用SCell的条件。在确定相关因素之后,PCell可以通过各因素来控制SCell。还需要用于激活SCell的方法。也就是说,当PCell从eNB接收到用于激活或停用SCell的指令时,需要对实际操作进行具体描述。
发明内容
技术问题
因此,需要一种用于执行设备的自我诊断的系统和方法,而没有当从计算机或用户界面手动地选择自我诊断项目而造成的不便。
以上信息只作为背景资料,以协助了解本公开。而对上述任何方面是否可应用到关于本发明的现有技术没有进行任何判定,或者没有进行任何断言。
解决方案
本发明的方面用于解决至少上述问题和/或缺点,并至少提供下面描述的优点。因此,本发明的一方面在于提供一种用于在采用载波聚合的时分双工(TDD)无线移动通信系统中激活或停用SCell的方法。
根据本发明的示例性实施例,提供了如下的技术,其中,当激活SCell时,根据在延迟时间段期间是否包括S子帧而开始的第一上行链路子帧中激活上行链路,并且在提供延迟时间段之后开始的第一下行链路子帧中激活下行链路。
根据本发明的另一示例性实施例,提供了如下的技术,其中,当停用SCell时,根据在延迟时间段期间是否包括S子帧开始的第一上行链路子帧中停用上行链路,并且在提供延迟时间段之后开始的第一下行链路子帧中停用下行链路。
根据本发明的另一个示例性实施例,提供了一种用于在使用载波聚合(CA)的时分双工(TDD)的移动通信系统中控制用于用户设备(UE)的副载波的方法。所述方法包括:通过UE来从演进节点B(eNB)中接收用于激活或停用副载波的副载波控制消息;如果副载波控制消息对应于用于激活特定副载波的消息,则操作定时器;以及在定时器期满之后首先到达的下行链路子帧中激活特定副载波的正向方向。
根据本发明的另一个示例性实施例,提供一种用于在使用载波聚合(CA)的时分双工(TDD)移动通信系统中控制副载波的用户设备(UE)。所述用户设备包括:收发器,用于向演进节点B(eNB)发送或从演进节点B(eNB)接收码元;和控制器。如果副载波控制消息对应于用于激活或停用特定副载波的消息,则控制器操作定时器。在定时器已经期满之后首先到达的下行链路子帧中,控制器激活特定副载波的正向方向
结合附图,从下面的详细描述中,本发明的其他方面、优点、和显着特征将对于本领域技术人员而言变得显而易见,其中,在以下的详细描述中公开了本发明的示例性实施例。
本发明的有益效果
如下面将描述的那样,本发明的示例性实施例可以包括用于控制副载波的方法,其能够在没有错误的情况下,执行在TDD系统中的SCell的激活和停用所需的整个操作。
附图说明
结合附图,从以下的描述中,本发明的某些示例性实施例的上述和其它方面、特征、和优点将变得更加明显,在附图中:
图1示出了根据本发明示例性实施例的长期演进(LTE)系统的结构的视图;
图2示出了根据本发明示例性实施例的LTE系统的无线协议栈的视图;
图3示出了用于描述根据本发明示例性实施例的用户设备(UE)中的载波聚合(CA)的视图;
图4示出了根据本发明示例性实施例的,具有5ms的切换点周期的时分双工(TDD)系统的帧结构;
图5示出了用于描述在根据本发明示例性实施例的控制方法中的消息流的流程图;
图6示出了用于描述在根据本发明示例性实施例的用户设备中激活副载波的方法的流程图;
图7示出了用于描述在根据本发明示例性实施例的用户设备中停用副载波的方法的流程图;以及
图8示出了根据本发明示例性实施例的用户设备的示意性框图。
具体实施方式
参照附图提供下面的描述,以协助全面理解由权利要求及其等同物限定的本发明的示例性实施例。其包括各种特定细节以帮助理解,但这些细节将被认为仅仅是示例性的。因此,本技术领域的普通技术人员将认识到,可以在不脱离本发明的范围和精神的情况下,对这里所描述的实施例进行各种变化和修改。此外,为了清楚和简明,可以省略对于公知的功能和结构的描述。
在下面的描述和权利要求书中使用的术语和词语不限于书面含义,而是仅仅由发明人使用来使得能够对本发明有清楚和一致的理解。因此,对于本领域的技术人员而言应该显而易见的是,提供本发明示例性实施例的以下描述仅仅用于说明目的,而不是为了限制由所附权利要求及其等同物限定的本发明的目的。
但是应当理解,除非上下文清楚地指出,否则单数形式“一个”和“该”包括复数对象。因此,例如,当提及“组件表面”时,包括表明有一个或多个这样的表面。
图1示出了根据本发明示例性实施例的长期演进(LTE)系统的结构的视图。
参照图1,LTE系统配置无线接入网络,其包括:演进节点B(eNB)105、110、115和120、移动管理实体(MME)125和服务网关(S-GW)130。用户设备(UE)135经由外部网络而连接到基站105、110、115或120以及S-GW 130。
例如,根据本发明的示例性实施例,eNB 105至120对应于通用移动通信系统(UMTS)的节点B。eNB(例如,eNB 105、110、115或120)通过无线信道而被连接到UE 135,并且其相对于现有的节点B或根据相关技术的节点B可以执行更复杂的功能。在LTE系统中,由于包括诸如,例如,互联网协议语音(VoIP)服务的实时服务的所有用户业务通过共享信道而被服务,所以有必要收集关于状态的信息(例如,诸如,UE的缓冲状态、可用的发送功率状态、信道状态等),并执行调度。例如,eNB 105至120中的每一个可以执行调度功能。一个eNB可以控制多个小区。例如,为了实现100Mbps的传输速率,LTE系统采用在20MHz带宽的正交频分复用(OFDM)。LTE系统还采用了自适应调制和编码(AMC)来根据UE的信道状态确定调制方案和信道编码率。
S-GW 130是提供数据承载的设备。例如,S-GW 130可以根据MME 125的控制来创建或删除数据承载。MME 125执行各种控制功能,包括UE的移动性管理。MME 125连接到多个eNB。
图2示出了在根据本发明示例性实施例的LTE系统中的无线协议栈的视图。
参照图2,UE和eNB的每一个包括分组数据汇聚协议(PDCP)205或240、无线链路控制(RLC)210或235、媒体接入控制(MAC)215或230、以及物理层(PHY)220或225。PDCP 205和240执行互联网协议(IP)标头的压缩解压缩。RLC 210和235将PDCP分组数据单元(PDU)重新配置至合适的大小,并且执行自动重传请求(ARQ)操作。MAC 215和230连接到在一个用户设备中配置的多个RLC层设备。MAC 215和230将RLC PUD复用到MAC PDU,并且从MAC PDU中解复用RLC PDU。在UE和eNB中的物理层(PHY)220和225信道编码和调制来自上层的数据,创建OFDM码元,并通过无线信道发送OFDM码元。此外,PHY 220和225将通过无线信道发送的OFDM码元解调和信道解码为高层数据,并且将数据传送到上层。
图3示出了用于描述根据本发明示例性实施例的,在用户设备(UE)中的载波聚合(CA)的视图。
参照图3,eNB在频带上发送/接收多载波。例如,eNB可以在频带上广播载波。作为一个例子,当eNB 305广播中心频率为f1的载波315和广播中心频率为f3的载波310时,常规的UE(例如,根据现有技术的UE)通过载波315和310中的一个来发送/接收数据。然而,根据本发明的示例性实施例,可以执行载波聚合的UE可以同时使用多个载波来发送/接收数据。例如,具有CA能力的UE 330可以并行地使用包括载波310和315的多个载波来发送和接收数据。根据本发明的示例性实施例,eNB305可以向可以执行载波聚合的UE 330分配更多的载波,使得UE 330的对应的数据传输速率增加。
如果假设小区通过其中的每个都从/由eNB发送/接收的一个正向(下行链路)载波和一个反向(上行链路)载波来形成(例如,一个小区通过下行链路载波形成,而一个小区通过上行链路载波来形成),则载波聚合可被理解为通过多个小区来同时发送/接收数据的UE。因此,UE的最大传输速率可以与聚合载波的数目成比例地增加。
在下面的描述中,当UE通过正向载波(例如,下行链路载波)接收数据,或通过反向载波(例如,上行链路载波)发送数据时,其对应于在其中UE通过由与频带和对载波进行特征化的中心频率相对应的小区所提供的控制信道和数据信道来发送和接收数据的示例。为了方便起见,将基于LTE系统来描述本发明的示例性实施例。然而,应该理解的是,本发明的示例性实施例不限于这样的示例。例如,本发明的示例性实施例可以应用于支持载波聚合的各种无线通信系统。
图4示出了根据本发明示例性实施例的,具有5ms的切换点周期的时分双工(TDD)系统的帧结构。
如表中所示,对应于配置0、1、2、和6的帧在子帧编号#1和#6处分别具有两个特定子帧。同样地,对应于配置3、4、和5的帧仅仅在子帧编号#1处具有一个特定子帧。
一个帧为10ms长,并且被细分为10个子帧(例如,对应于#0、#1、#2、...、#9)。每个子帧为1ms长。根据配置或TDD配置,子帧#0、#2、#3、#4、#5、#7、#8、#9可被用作下行链路子帧(例如,由“D”表示)或上行链路子帧(例如由“U”表示)。相对于TDD配置No.0,子帧#0和#5被用作下行链路子帧,并且子帧#2、#3、#4、#7、#8和#9被用作上行链路子帧。同样地,相对于TDD配置No.1,子帧#0、#4、#5和#9被用作下行链路子帧,而子帧#2、#3、#7、#8被用作上行链路子帧。
参照图4,子帧#1和#6(对应于配置0、1、2和6)是在下行链路和上行链路子帧之间的特定子帧。也就是说,特定子帧是指被分成下行链路载波导频时隙(DwPTS)、保护间隔(GP)、和上行链路导频时隙(UpPTS)的时隙。在DwPTS中,可以发送下行链路数据。在UpPTS中,不能够发送上行链路数据。然而,在UpPTS期间,探测参考码元(SRS)可以被发送。GP是指在下行链路和上行链路之间的暂停部分(pause section)。
下面描述解释了在其中UE从eNB接收用于激活和停用SCell的指令的本发明的示例性实施例。本发明的示例性实施例包括当UE从eNB接收激活指令时,在特定的时间点之后执行UE的部分功能的方法。本发明的示例性实施例还提出了当UE从eNB接收停用指令时,在特定的时间点之前中断UE的部分功能,以及在特定时间点之后中断其他部分的功能的方法。
例如,用于执行和终止操作所需的时间段可以与用于执行和终止另一操作所需的时间段不同。如果操作被设置成在同一时间点被激活或终止,则该时间段被设置为需要比其他操作更长的时间段的操作(例如,该时间段被设置为对应于在所需要的时间段中最长的时间段)。这将导致激活和停用的增长。例如,在紧接在从eNB接收指令之后,UE不能使用SCell来发送/接收数据,因为需要花费额外的时间段激活设备来使用SCell。此外,虽然用于使用SCell设备被激活,但是部分功能可能需要额外的时间段以正常工作。
图5示出了用于描述在根据本发明示例性实施例的控制方法中的消息流的流程图。
参照图5,根据本发明的示例性实施例,在步骤505中,使用SCell控制消息(或者,例如,副载波控制消息),通过第N子帧,eNB 503向UE 501通知将被激活或停用的SCell。在下面的描述中,假定SCell控制消息是激活/停用MAC控制元素(CE)。作为示例,激活/停用MAC CE具有为8位的固定大小,并且包括七个C字段和一个R字段。R字段是保留字段。七个C字段通过Ci(例如,C7、C6、C5、C4、C3、C2、C1)来表示。例如,如果SCelli被设置为“1”,那么eNB向UE通知激活该副载波。作为另一个示例,如果SCelli被设置为“0”,则eNB向UE通知停用该副载波。
在步骤507,UE 501根据接收的SCell控制消息来识别将被激活或停用的SCell,并且分别操作用于激活的SCell的定时器1(例如,第1定时器)和定时器2(例如,第二定时器)。
定时器1按照每SCell来操作。当正向或反向发送源被分配给相应的SCell时,定时器1被重新操作。如果直到计时器已期满都没有使用载波,则该载波被停用。定时器1在子帧m中期满,其中,m是正整数(例如,8)。考虑到用于接收和解码激活/停用MAC CE所需的时间段,以及对意思的识别来设置整数m。例如,优选的是,考虑处理速度低的UE,m被设置为相对较大的值。
在步骤509中,在UE 501已经接收到激活/停用MAC CE之后,UE 501在子帧m中或者在定时器2已经期满之后的第一个下行链路子帧(即,在定时器2已经期满之后首先到达的下行链路子帧)中,激活SCell的正向方向。例如,第一个下行链路子帧被表示为在图4的表中的“D”。激活SCell的正向方向是指从相应子帧开始执行与SCell的正向方向相关的操作。例如,与SCell的正向方向相关的操作可以包括监视物理下行链路控制信道(PDCCH)等等。
同时,在UE 501已经接收到激活/停用MAC CE,并且定时器2在子帧m中已经期满之后,在步骤511中,UE 501确定在定时器2的操作期间是否存在特定子帧。例如,特定子帧对应于在图4的表中由S表示的子帧。
在步骤511处,当UE 501确定在定时器2的操作期间存在S子帧时,UE 501在S子帧中,或者在没有定时器2已经期满之后的第一PDCCH(即,如果PDCCH在定时器2已经期满之后首先到达)的子帧中,激活SCell的反向方向。
相反,当UE 501确定在定时器2的操作期间不存在S子帧时,在步骤511处,UE 501在第一S子帧之后的子帧中或者在定时器2已经期满之后的第一S子帧中激活SCell的反向方向。例如,激活SCell的反向方向可以对应于执行与SCell的反向方向相关的如下操作:
1)开始报告信道状态信息(CSI),其中,CSI包括信道质量指示符(CQI)、预编码矩阵指数(PMI)、秩指示符(RI)、预编码器类型指示(PTI)等,其可以允许eNB在链路自适应与调度方面协助相应的UE。在下面提供对于CQI、PMI、RI、和PTI的描述。
(1)CQI对应于推荐的传输格式,满足10%的误码率。
(2)PMI对应于闭环空间复用指数。
(3)RI对应于建议的传输链路。
(4)PTI对应于预编码器类型指示符。
2)如果SRS已经被预置,则开始发送探测参考码元(SRS)。
根据本发明的另一个示例性实施例,当UE 501确定在定时器2的操作期间不存在S子帧时,则UE 501在定时器已经期满之后的第一S子帧中执行第一操作,并且在定时器已经期满之后的第一S子帧之后的子帧中执行第二操作。第一操作的示例可以是诸如SRS发送的反向发送码元的发送。第二操作的示例可以是诸如,物理上行链路共享信道(PUSCH)发送的正常反向发送。
如上所述,根据本发明的另一示例性实施例,因为尽管在S子帧的UpPTS中执行反向发送,但是可能不能执行所有的反向发送,所以操作可以分开。即,在S子帧的UpPTS中,只有诸如SRS发送的少数传输可以被执行,但不能支持PUSCH。
在步骤513中,eNB 503使用SCell控制消息(或者,例如,副载波控制消息),向UE501通知SCell的激活或停用。假设副载波控制消息是激活/停用MAC控制元素(CE)。
例如,激活/停用MAC CE具有8比特的固定的大小。作为示例,激活/停用MAC CE包括七个C字段和一个R字段。R字段是保留字段。该七个C字段通过Ci(例如,C7、C6、C5、C4、C3、C2、C1)来表示。例如,如果SCelli被设置为“1”,则eNB向UE通知副载波的激活。作为另一个示例,如果SCelli被设置为“0”,则eNB向UE通知副载波的停用。SCell的索引i被用来表示用于副载波的标识符。例如,SCell的索引i具有1到7的正整数。当设置新的副载波时,UE向eNB报告标识符以及与副载波有关的信息。
在步骤515中,UE 501根据接收到激活/停用MAC CE来识别激活或停用的SCell,并且如果特定的SCell被停用,则UE 501操作定时器2。或者,在不执行步骤513(即,没有向UE501通知激活或停用的SCell)的情况下,如果eNB 503在预设的时间段内不向UE 501分配用于相应的SCell的正向或反向发送源,那么虽然定时器1已经期满,UE 501仍操作定时器2。定时器2在子帧m处期满,其中m是正整数(例如,8)。
在步骤519中,UE 501在定时器2已经期满之后的第一下行链路子帧(即,在定时器2已经期满之后首先到达的下行链路子帧)中,停用SCell的正向方向。例如,第一下行链路子帧被表示为图4的表中的“D”。停用SCell的正向方向对应于不执行与SCell的正向方向相关的操作。例如,与SCell的正向方向有关的操作可以包括监视物理下行链路控制信道(PDCCH)等。
在步骤521中,在定时器2已经期满之后,UE 501确定在定时器2的操作期间是否存在特定的子帧。例如,特定子帧可以对应于在图4的表中通过S表示的子帧。作为示例,步骤521可以与步骤519同时进行。此外,在步骤521处,当UE 501确定了在定时器2的操作期间存在S子帧时,UE 501在没有定时器2已经期满之后的第一PDCCH的子帧中停用SCell的反向方向,或者在S子帧中停用SCell的反向方向。
相反,在步骤521中,当UE 501确定在定时器2的操作期间不存在S子帧时,则UE501在第一S子帧之后的子帧中,或者在定时器2已经期满之后的第一S子帧中,停用SCell的反向方向。例如,停用SCell的反向方向对应于中断与SCell的反向方向相关的以下操作:
1)中断报告CSI
2)中断发送SRS
如上所述,本发明的示例性实施例包括在其中,载波可以被激活和/或停用的方法。
图6示出了用于描述在根据本发明示例性实施例的用户设备中激活副载波的方法的流程图。
在步骤601中,UE接收用于识别被激活或停用的SCell的激活/停用MAC CE。激活/停用MAC ME可能包括8位的位图。例如,在步骤601中,UE根据接收的激活/停用MAC CE确定是否要激活新的SCell,并且UE根据接收的激活/停用MAC CE来识别要被激活的此种SCell。
在步骤603处,当UE确定激活/停用MAC CE包括要激活的新SCell时,UE为激活的SCell分别操作定时器1和定时器2。例如,UE识别在接收MAC CE之前被停用的SCell,并且当接收MAC CE时,UE确定在MAC CE的相应位图上是否为停用的SCell标记了“激活”。
在步骤605处,在定时器2已经期满之后,UE如以上参考图5所述地激活SCell的正向和反向方向。
UE从定时器2已经期满之后的第一下行链路子帧起激活SCell的正向方向。激活SCell的正向方向是指从对应的子帧执行与SCell的正向方向相关的操作。例如,与SCell的正向方向有关的操作可以包括监视物理下行链路控制信道(PDCCH)等。
在定时器2已经期满之后,UE 501确定在定时器2的操作期间是否存在特定子帧。作为示例,特定子帧可以对应于参考图4由S表示的子帧。当UE 501确定在定时器2的操作期间存在S子帧时,UE 501在没有定时器2已经期满之后的第一PDCCH的子帧中激活SCell的反向方向,或者在S子帧中激活SCell的反向方向。相反,当UE 501确定在定时器2的操作期间不存在S子帧时,则UE 501在第一S子帧之后的子帧中,或者在定时器2已经期满的第一S子帧中,激活SCell的反向方向。例如,激活SCell的反向方向可以对应于执行与SCell的反向方向相关的以下操作:
1)开始报告信道状态信息(CSI),其中,CSI包括信道质量指示符(CQI)、预编码矩阵指数(PMI)、秩指示符(RI)、预编码器类型指示(PTI)等,其允许eNB在链路自适应和调度方面协助相应的UE。CQI、PMI、RI、和PTI进一步说明如下。
(1)CQI对应于推荐的传输格式,满足10%的误码率。
(2)PMI对应于闭环空间复用指数。
(3)RI对应于建议的传输链路。
(4)PTI对应于预编码器的类型指示符。
2)如果SRS已经被预置,则开始发送探测参考码元(SRS)。
图7示出用于描述在根据本发明示例性实施例的用户设备中停用副载波的方法的流程图。
根据本发明的示例性实施例,在步骤701处,UE根据接收的激活/停用MAC CE来识别要被停用的SCell,或者确定定时器1(诸如,例如在图6的步骤603处操作的定时器1)是否已期满。例如,激活/停用MAC CE可能包括8位的位图。
当UE确定定时器1已期满时,在步骤703处,UE操作定时器2以用于相应的SCell。
在定时器2已期满之后,在步骤705处,UE停用SCell的正向和反向方向,诸如,例如,参考图5的部分所描述的。
例如,在计时器2已经期满之后,UE从第一下行链路子帧起停用SCell的正向方向。
另外,在步骤705中,在定时器2已期满之后,UE确定在定时器2的操作期间是否存在特定子帧。例如,特定子帧可以对应于在图4的表中通过S表示的子帧。当UE确定在定时器2的操作期间存在S子帧时,UE在没有定时器2已经期满之后的第一PDCCH的子帧中停用SCell的反向方向,或者UE在S子帧中停用SCell的反向方向。相反,当UE确定在定时器2的操作期间不存在S子帧时,则UE在第一S子帧之后的子帧中,或者在定时器2已经期满之后的第一S子帧中,停用SCell的反向方向。例如,停用SCell的反向方向对应于中断与SCell的反向方向相关的以下操作:
1)中断报告CSI
2)中断发送SRS
如上所述,本发明的示例性实施例在当使用载波聚合来激活或者停用SCell时,可以在预设的时间处执行预设的操作,由此防止了故障。例如,根据本发明的示例性实施例,TDD系统当使用载波聚合来激活或者停用SCell时,可以在预设的时间处执行预设的操作,由此防止了故障。
图8示出了根据本发明示例性实施例的用户设备的示意性框图。
参照图8,UE可以包括收发器801、多路复用器-多路分解器(mux/demux)单元803、上层(upper layer)单元805、控制消息处理器807、控制器809、和SCell激活/停用单元811。
根据本发明的示例性实施例,UE通过上层单元805向/从其他系统发送/接收数据,并且通过控制消息处理器807来控制消息。在与数据的发送对应的操作中,控制器809控制多路复用器-多路分解器(mux/demux)803以便复用数据,并且控制收发器801以便发送复用的数据。在对应于数据的接收的操作中,控制器809控制收发器801,以便接收物理码元,并控制多路复用器-多路分解器803以解复用码元,并且根据控制消息来将解复用的数据发送到上层单元805或控制消息处理器807。
根据本发明的示例性实施例,控制消息处理器807接收激活/停用MAC CE,并且向SCell激活/停用单元811通知激活/停用MAC CE的接收。当相应的SCell被激活时,定时器1和2被操作。在此之后,SCell激活/停用单元811搜索在定时器2已期满之后要被激活的上行链路和下行链路子帧,并且在相应的时间将其激活。
如果SCell激活/停用单元811接收用于停用激活的SCell的命令,或用于激活的SCell的计时器1已期满,则SCell激活/停用单元811操作定时器2。在此之后,SCell激活/停用单元811搜索在计时器2已期满之后要被停用的上行链路和下行链路子帧,并且在相应的时间停用上行链路和下行链路子帧。
虽然这里所描述的本发明的示例性实施例包括以组件根据功能来区分的方式而实现的UE,但应该理解的是,本发明并不限于这些实施例。例如,示例性实施例可以以控制器809可以如下执行控制消息处理器807的部分操作的方式而被修改。
当控制器809从eNB接收用于激活或停用副载波的副载波控制消息,并且副载波控制消息是用于激活特定的副载波的消息时,控制器809操作定时器。控制器809可以在定时器已经期满之后首先到达的下行链路子帧中激活副载波的正向方向。
在定时器已期满之后,控制器809可以确定在定时器的操作期间是否存在S子帧。当控制器809确定S子帧存在时,控制器809在S子帧中,或者在没有定时器已经期满之后首先到达的PDCCH的子帧中,激活副载波的反向方向。
当控制器809确定S子帧不存在时,控制器在定时器已经期满之后首先到达的S子帧中,或者在第一S子帧之后的子帧中激活副载波的反向方向。
或者,当控制器809确定S子帧不存在时,控制器在定时器已经期满之后首先到达的S子帧中执行第一操作,并且在定时器已经期满之后首先到达的S子帧之后的子帧中执行第二操作。因为上面已经描述了第一和第二操作,所以在下面的描述中将省略对于第一和第二操作的详细描述。
当副载波控制消息是用于停用特定副载波的信息时,控制器809操作定时器。控制器809在定时器已经期满之后首先到达的下行链路子帧中,停用副载波的正向方向。
在计时器已期满之后,控制器809识别在定时器的操作期间是否存在S子帧。当控制器809确定S子帧存在时,控制器在S子帧中,或者在没有定时器已经期满之后首先到达的PDCCH的子帧中,停用副载波的反向方向。
当控制器809确定S子帧不存在时,控制器在定时器已经期满之后首先到达的S子帧(其为第一S子帧)中,或者在第一S子帧之后的子帧中,停用副载波的反向方向。
如上所述,本发明的示例性实施例在当使用载波聚合来激活或者停用SCell时,可以在预设的时间处执行预设的操作,由此防止了故障。例如,根据本发明的示例性实施例,TDD系统当使用载波聚合来激活或者停用SCell时,可以在预设的时间处执行预设的操作,由此防止了故障。
如上所述,本发明的示例性实施例可以包括用于控制副载波的方法,其可以在没有错误的情况下,执行在TDD系统中激活和停用SCell所需的整个操作。
虽然已参考本发明的若干示例性实施例示出和描述了本发明,但是本领域技术人员应当理解,可以在不脱离由所附权利要求和它们的等同物所定义的本发明的精神和范围内,对其进行形式和细节上的各种改变。

Claims (18)

1.一种使用载波聚合(CA)的移动通信系统中的方法,所述方法包括:
由终端从基站接收用于激活副小区的控制信息;
由终端在第一子帧中发送包括用于所述副小区的信道状态信息(CSI)的第一信息;和
由终端在不早于所述第一子帧的时候发送包括用于所述副小区的探测参考信号的第二信息。
2.根据权利要求1所述的方法,其中,如果在子帧n中接收到所述控制信息,则在子帧n+8中发送所述第一信息。
3.根据权利要求1所述的方法,其中所述第一信息包括信道质量指示符(CQI)。
4.根据权利要求1所述的方法,其中,接收所述控制信息和发送所述第一信息之间的时间间隔是对应于8个子帧的时间。
5.根据权利要求1所述的方法,
其中所述第二信息是不迟于第二子帧而被发送的,并且
其中所述第二子帧与所述第一子帧不同。
6.根据权利要求1所述的方法,还包括:
由终端在不早于发送所述第一信息的时候激活副小区的前向方向。
7.根据权利要求1所述的方法,其中所述控制信息是用于激活所述副小区的媒体接入控制(MAC)控制元件(CE)。
8.根据权利要求7所述的方法,其中所述MAC CE包含用于所述副小区的第一字段和至少一个第二字段,以及
其中所述第一字段是保留字段,并且所述第二字段指示用于激活的至少一个副小区。
9.根据权利要求8所述的方法,其中,所述MAC CE是8比特,并且
其中所述第一字段是1比特,以及所述第二字段是7比特。
10.一种使用载波聚合(CA)的移动通信系统中的终端,所述终端包括:
收发器,被配置为发送和接收信号;和
控制器,被配置为:
从基站接收用于激活副小区的控制信息;
在第一子帧中发送包括用于所述副小区的信道状态信息(CSI)的第一信息;和
在不早于所述第一子帧的时候发送包括用于所述副小区的探测参考信号的第二信息。
11.根据权利要求10所述的终端,其中,如果在子帧n中接收到所述控制信息,则在子帧n+8中发送所述第一信息。
12.根据权利要求10所述的终端,其中所述第一信息包括信道质量指示符(CQI)。
13.根据权利要求10所述的终端,其中,接收所述控制信息和发送所述第一信息之间的时间间隔是对应于8个子帧的时间。
14.根据权利要求10所述的终端,
其中所述第二信息是不迟于第二子帧而被发送的,并且
其中所述第二子帧与所述第一子帧不同。
15.根据权利要求10所述的终端,其中所述控制器还被配置为:在不早于发送所述第一信息的时候激活副小区的前向方向。
16.根据权利要求10所述的终端,其中所述控制信息是用于激活所述副小区的媒体接入控制(MAC)控制元件(CE)。
17.根据权利要求16所述的终端,其中所述MAC CE包含用于所述副小区的第一字段和至少一个第二字段,以及
其中所述第一字段是保留字段,并且所述第二字段指示用于激活的至少一个副小区。
18.根据权利要求17所述的终端,其中,所述MAC CE是8比特,并且
其中所述第一字段是1比特,以及所述第二字段是7比特。
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