CN103201972A - 在无线通信系统中接收不同形式子帧的方法和装置 - Google Patents

在无线通信系统中接收不同形式子帧的方法和装置 Download PDF

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CN103201972A
CN103201972A CN2011800533706A CN201180053370A CN103201972A CN 103201972 A CN103201972 A CN 103201972A CN 2011800533706 A CN2011800533706 A CN 2011800533706A CN 201180053370 A CN201180053370 A CN 201180053370A CN 103201972 A CN103201972 A CN 103201972A
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subframe
base station
physical downlink
mbsfn subframe
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CN103201972B (zh
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张宰赫
郑景仁
G.J.范利肖特
金成勋
韩臸奎
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Samsung Electronics Co Ltd
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    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/71—Wireless systems
    • H—ELECTRICITY
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    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
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    • H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
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    • H04W48/00—Access restriction; Network selection; Access point selection
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    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
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    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
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    • H04J2211/00—Orthogonal indexing scheme relating to orthogonal multiplex systems
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    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
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    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • Y—GENERAL 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
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Abstract

本发明提出了一种当两种类型的子帧（第一子帧和第二子帧）存在于无线通信系统中时防止高版本终端为第二子帧执行不必要的操作的方法。通过本发明，高版本终端跳过了不必要的操作，使得不必要的功耗减少。

Description

在无线通信系统中接收不同形式子帧的方法和装置
技术领域
本发明涉及无线通信系统，特别是在不同版本（系统版本（Release，Rel）8、9、10等）终端共存的长期演进（LTE）系统的高版本（Rel-10）网络中存在支持单播的多媒体广播多播服务单频网络（Multimedia BroadcastMulticast service Single Frequency Network，MBSFN）子帧的情况下高版本（Rel-10）终端的操作方法和装置。
背景技术
随着无线通信技术的快速发展，通信系统已经发展到以LTE系统为代表的第四代移动通信系统。在LTE系统里，数据以10ms长度的帧为单位传输，一帧由10个子帧组成。
图1是示出在LTE系统中使用的下行帧的结构的示图。
在图1中，帧101由10个子帧103组成，子帧103包括携带普通数据的普通子帧150和多媒体广播多播服务单频网络（MBSFN）子帧107。普通子帧和MBSFN子帧在正交频分复用（OFDM）码元的数量、循环前缀（CyclicPrefix,CP）长度以及小区特定的参考信号（Cell-specific Reference Signal,CRS）的结构和数量上彼此不同，并且MBMS子帧在Rel-8和Rel-9系统中仅仅用来传输广播和多播数据。然而随着系统发展，在LTE Rel-10或以后的版本中，MBSFN子帧可以用于针对特定终端的单播传输以及广播/多播。
对于单播数据的发送/接收，指示分配用于发送/接收的资源的资源分配信息由物理下行控制信道（Physical Downlink Control Channel,PDCCH）携带，而真正的数据由物理下行共享信道（Physical Downlink Shared Channel,PDSCH）携带。终端在尝试接收真正的数据之前，确定在PDCCH上是否存在任何指向该终端的资源分配信息。
在这种情况下，为了即使是通过MBSFN子帧接收PDSCH，LTE Rel-10终端也必须为MBSFN子帧检查携带资源分配信息的PDCCH。然而，如果LTE Rel-10终端必须在每一个MBSFN子帧中检查PDCCH，这取决于MBSFN子帧携带的是特定终端的单播数据还是多播/广播数据，可能会引起不必要的操作。
发明内容
技术问题
本发明致力于解决这个问题，并且本发明的目的在于提供一种在包括以不同版本LTE运行的网络的无线通信系统中、在存在不同类型子帧的情况下终端接收数据的方法。
技术方案
在新版本（Rel-10或以后的版本）终端处于新版本网络的情况下，终端接收关于新版本网络是否可支持通过广播或者单播接收MBSFN子帧上的PDSCH的信息，并且，如果可支持，则执行为了接收MBSFN子帧上的PDSCH而解释PDCCH的操作；否则，如果不可支持，则跳过在MBSFN子帧中的相应操作。
有益效果
在所提出的方法中，取决于网络是否支持MBSFN子帧中的单播数据传输，当网络不支持单播数据传送时，运行在新版本网络中的新版本终端减少了用于数据接收的不必要的操作，进而实现了功耗的减少。
附图说明
图1是示出在LTE系统中使用的下行帧的结构的示图；
图2是示出在根据本发明实施例的方法中的新终端过程的流程图；
图3是示出根据本发明实施例的终端的配置的方框图。
具体实施方式
在下文中，为了避免模糊本发明的主题，省略了对结合于此的公知功能和结构的详细描述。本发明的示例实施例将参照附图详细阐述。
在本发明中，为方便起见，针对LTE系统进行描述。
LTE有多个系统版本，其中，传统的Rel-8和Rel-9不支持在MBSFN子帧中接收PDSCH。因此，传统的终端不会为了接收包括PDSCH调度信息的下行控制信息（Downlink Control Information，DCI）而解码PDCCH，所述PDSCH调度信息用于在MBSFN子帧中接收PDSCH。
然而在Rel-10或以后的系统中，允许在MBSFN子帧中传输PDSCH。在这种情况下，与因为不能在MBSFN子帧中接收PDSCH而对MBSFN子帧不采取措施的传统终端不同，新终端必须为接收PDSCH采取措施，以便获得包括调度信息的DCI，以用于在MBSFN子帧中接收PDSCH。在接下来的描述中，新终端指的是LTE Rel-10终端，也就是能够在MBSFN子帧中接收PDSCH的终端。
图2是示出根据本发明实施例的方法中的新终端过程的流程图。
在步骤203中，新版本终端接收在由基站广播的系统信息块中的下行帧结构。下行帧结构以指示MBSFN子帧位置的位图的形式发送。
接下来，在步骤205中，终端接收关于基站是否支持MBSFN子帧上的PDSCH的信息。MBSFN子帧上的PDSCH的可支持性可以在基站的系统信息中广播，或者可以通过相应的控制消息发送到单独的终端。MBSFN子帧上的PDSCH的可支持性信息可以显式地以新定义的指示符或者隐式地以传统的信息（如预定义的信道配置信息、传输模式信息等）在无线资源控制（RadioResource Control,RRC）消息里传输。步骤203和205可以以相反的次序执行。在传统网络或者传统基站的情况下，不传输关于MBSFN上的PDSCH的可支持性信息。如果没有接收到关于MBSFN上的PDSCH的可支持性信息，用户设备（UE）假设基站不支持MBSFN的PDSCH。
如果在步骤207中确定支持MBSFN子帧上的PDSCH，则在步骤209中，UE接收包括DCI的PDCCH，以便基于在步骤205中接收到的信息接收MBSFN子帧中的PDSCH。
如果在步骤207中确定不支持MBSFN子帧上的PDSCH、或者如果没有接收到关于MBSFN子帧上的PDSCH的可支持性信息，则终端不采取用于接收MBSFN子帧中的PDSCH的措施。在这种情况下，终端不执行任何用于接收PDSCH的操作。
图3是示出根据本发明实施例的终端的配置的方框图。
终端与高层(higher layer)305进行数据通信，并且通过控制消息处理器207发送/接收控制消息。终端利用复用器/解复用器303复用控制信号或数据，并且在控制器309的控制下利用收发器301发送复用结果。终端利用复用器/解复用器303对收发器301接收到的物理信号进行解复用，并且在控制器309的控制下将解复用的信号传送到高层305或者控制消息处理器307。
在本发明中，终端接收由基站广播的MBSFN子帧配置信息，并且通过广播或单播接收关于MBSFN子帧上的PDSCH的可支持性信息。接收到这样的控制消息后，控制消息处理器307将关于每一个子帧是普通子帧还是MBSFN子帧以及MBSFN上的PDSCH是否被支持的信息传送到控制器309，以便确定是否在每一个子帧上接收PDCCH以用于接收PDSCH。也就是说，如果支持MBSFN子帧上的PDSCH，则终端执行用于接收甚至在MBSFN子帧中的PDSCH的操作，相反，如果不支持MBSFN子帧上的PDSCH，则终端不执行用于接收在MBSFN子帧中的PDSCH的动作。
虽然终端的方框图示出的是功能块负责不同的功能的情况，然而本发明不限于此。例如，控制器309可以执行控制消息处理器307的功能。
在所提出的方法中，网络通知新版本终端其是否支持MBSFN子帧上的PDSCH，以避免用于接收MBSFN子帧上的PDSCH的不必要的接收操作，进而使得功耗减少。
虽然在这里以特定的术语具体描述了本发明的示例实施例，但这仅是为了描述特定实施例的目的，不是为了限制本发明。虽然已经例示和描述了本发明的特定实施例，然而对本领域技术人员来说，在不脱离本发明的精神和范围的情况下，很明显可以进行各种其它变化和修改。

Claims (6)

1.一种在无线通信系统中的终端的子帧接收方法，该方法包括：
接收系统信息块，该系统信息块包括关于下行帧结构的信息；
接收关于基站是否支持多媒体广播多播服务单频网络（MBSFN）子帧上的物理下行共享信道的信息；以及
当基站支持MBSFN子帧上的物理下行共享信道时，接收在MBSFN子帧中的物理下行控制信道。
2.如权利要求1所述的方法，还包括：当基站不支持MBSFN子帧上的物理下行共享信道时，跳过对在MBSFN子帧中的物理下行控制信道的接收。
3.如权利要求1所述的方法，其中，接收信息包括接收无线资源控制（RRC）消息，该RRC消息包括指示基站对MBSFN子帧上的物理下行共享信道的可支持性的指示符。
4.一种在无线通信系统中接收基站发送的子帧的终端，该终端包括：
收发器，其向基站发送控制信息和数据以及从基站接收控制信息和数据；以及
控制器，其控制接收包括关于下行帧结构的信息的系统信息块，控制接收关于基站是否支持多媒体广播多播服务单频网络（MBSFN）子帧上的物理下行共享信道的信息，以及当基站支持MBSFN子帧上的物理下行共享信道时，控制接收在MBSFN子帧中的物理下行控制信道。
5.如权利要求4所述的终端，其中，当基站不支持MBSFN子帧上的物理下行共享信道时，控制器控制跳过对在MBSFN子帧中的物理下行控制信道的接收。
6.如权利要求4所述的终端，其中，所述控制器控制接收无线资源控制（RRC）消息，该RRC消息包括指示基站对MBSFN子帧上的物理下行共享信道的可支持性的指示符。
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CN113692035A (zh) * 2021-08-16 2021-11-23 紫光展锐(重庆)科技有限公司 一种mbsfn子帧接收方法及通信装置

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