CN101040550A - 在无线系统中用于功率节约的方法和装置 - Google Patents

在无线系统中用于功率节约的方法和装置 Download PDF

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CN101040550A
CN101040550A CNA2005800350324A CN200580035032A CN101040550A CN 101040550 A CN101040550 A CN 101040550A CN A2005800350324 A CNA2005800350324 A CN A2005800350324A CN 200580035032 A CN200580035032 A CN 200580035032A CN 101040550 A CN101040550 A CN 101040550A
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V·亚诺弗
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Taiwan Semiconductor Manufacturing Co TSMC Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0209Power saving arrangements in terminal devices
    • H04W52/0251Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity
    • H04W52/0258Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity controlling an operation mode according to history or models of usage information, e.g. activity schedule or time of day
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12Messaging; Mailboxes; Announcements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0209Power saving arrangements in terminal devices
    • H04W52/0212Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0222Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave in packet switched networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0209Power saving arrangements in terminal devices
    • H04W52/0225Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0235Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a power saving command
    • 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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Abstract

提供了一种用于在无线用户终端中实现功率节约过程的方法,该无线用户终端可操作以接收至少两个不同的业务,每个业务的特征在于与该业务关联的通信量需求相关的一个或多个特性。该方法包括以下步骤:基于它们的业务量需求相关的特性,将至少两个不同业务的每个业务分类成相应的功率节约种类,其中有与至少两个不同业务关联的至少两个不同的功率节约种类;对于每个功率节约种类,确定需要的侦听窗口和需要的睡眠窗口;在基站和用户设备之间交换消息以同步用于实现功率节约过程的参数。

Description

在无线系统中用于功率节约的方法和装置
技术领域
本发明通常涉及数字通信,特别涉及功率节约领域。
背景技术
2004年9月18日出版的“Draft IEEE Standard for Local andmetropolitan area networks,Part 16:Air Interface for Fixed andMobile Broadband Wireless Access Systems Amendment for Physicaland Medium Access Control Layers for Combined Fixed and MobileOperation in Licensed Bands”在此处被称作“IEEE 802.16出版物”。在此引用所述公开的参考文件作为参考。IEEE802.16出版物是国际建议,其被用于组合的固定和移动操作。为了试图实现有效的功率利用,“睡眠模式”过程已经由该标准定义。该睡眠模式过程实质上包括了侦听窗口(其中用户终端准备与基站通信)和睡眠窗口(其中终端可以断电以降低损耗功率的等级)相交织的无限序列。根据该建议,每个侦听窗口的持续时间具有固定的大小,而睡眠窗口的持续时间大小加倍,直到某个界限。对于传送“任意”业务量的情况,例如像WEB浏览的“突发”IP业务量,该过程给出一个适当的解决方法。这种业务量典型的特征在于与非实时MAC连接相关联并且是尽力类型的连接。
然而,当不同类型的业务由基站呈现给与其关联的多个用户终端,而睡眠模式过程适合于具有任意值的单一业务类型时,出现了一个问题。这种睡眠模式过程不能被充分地应用于诸如一方面语音/VoIP应用而另一方面一些其它的实时应用的业务,由于后者典型地具有和上述一个不同的模型,因此这样的睡眠模式过程不能被应用于所有这些业务。
必须向不同的用户一起提供多播/广播业务,比如说,必须提供WEB浏览业务,这将造成问题,因为当应用由IEEE 802.16出版物提供的单一类型的睡眠模式过程时,处理不同类型的业务实际上是不可能的。
在支持多播业务的系统中出现了另一个问题。典型地,终端被设计为具有不同需求模型的多播连接和单播连接,所以在不同终端之间睡眠/侦听循环的同步将几乎不可能。在IEEE 802.16出版物的睡眠模式方案下,唯一合理的解决方案是中断所有相关终端的睡眠模式并安排数据传送。与中断处于它们睡眠模式的终端相关联的后果就是中断的终端将从睡眠窗口的最低值被重新激活,这样反过来引起功率节约有效性的降低。
然而当需要将睡眠模式操作与一个或多个如测距、连接建立/配置、SNMP等的管理过程组合时,出现另一个问题。假定终端当前处于睡眠模式,由于没有业务量经由现有连接被传送并且需要增加更多的连接。在这种情况中,基站(“BS”)必须保持终端可用于相应事务,虽然仍然没有需求使用现有连接,其意味着事实上没有理由中断它们的睡眠状态。但是不管上面情况,根据在现有技术中通常使用的过程,为了应用连接建立过程,终端的睡眠模式将通过“Traffic Indication(业务量指示)”消息而被中断(即使,如上面解释的,没有业务量将沿着当前连接被传送)。因此,睡眠模式过程将不得不从最低的睡眠窗口值被重新应用。
发明内容
因此本发明的一个目标是提供一种新的方法用于通过最小化在移动终端的功率损耗来实现功率节约。
本发明的另一个目标是提供一种新的方法用于控制在移动终端的功率损耗,以提供较高的功率利用效率。
本发明的再另一个目标是提供一种方法用于通过最小化在移动终端的功率损耗实现功率节约,该移动终端适用于提供具有不同功率请求模型的多个业务。
发明的其它目标将由于本发明过程的描述而变得明显。
因此根据本发明的第一实施例提供了一种方法,用于在属于无线网络的用户设备处实行功率节约,该无线网络包括基站和至少所述用户设备,其中所述用户设备适用于接收至少两个不同的业务,每个业务的特征在于与该业务关联的业务量要求相关的一个或多个特性。
该方法包括下面的步骤:
倘若有与用户设备支持的业务关联的至少两个不同的功率节约种类,则基于它们的业务量需求相关特性,将所述至少两个不同业务的每个业务分类成相应的功率节约种类;
对于所述功率节约种类的每个功率节约种类,确定需要的侦听窗口和需要的睡眠窗口;
在所述基站和所述用户设备之间交换消息以同步用于实现功率节约过程的参数。这些参数优选地包括在时间域中侦听/睡眠窗口的位置和用于终止整个过程的条件(例如,如果在一个连接处出现了需求)。更优选地,参数集包括用于实行睡眠/侦听窗口的序列的起始点。对于与相应功率节约种类关联的业务(连接),在睡眠窗口期间假设没有通信。
正如本领域技术人员所知的,将至少两个不同业务的每个业务进行分类的步骤,可以通过实施多种选择的任何一个或多个来实现,诸如基于业务的类型,基于业务量需求模型,基于特定业务所属的业务组等,所有这些可以理解为都包括在本发明之内。
接下来,在不同业务的供应期间,确定用户设备(例如移动终端)的不可用时间窗口,其中基站和用户设备之间没有通信被交换,即与终端关联的所有业务在该窗口是非活动的;并且然后
对于一个或多个不可用窗口的持续时间,降低用户设备的功率等级。
如此处所使用的术语“功率节约种类”被用于表示包括一个或多个MAC连接(业务)的一个或多个业务的组,其全部特征在于具有相似的业务量(需求)行为,其中这些连接全部被包括在单个的功率节约种类中,将与相同的侦听和睡眠窗口序列相关联。如果我们考虑,例如,WEB浏览(业务A)和至远程文件服务器的通信(业务B)具有相同的业务量(需求)行为,则它们可以与单个的功率节约种类相关联。然而,即使两个业务具有同样的业务量行为类型,但业务量行为的参数不同,在该情况中两个业务的每一个业务将属于不同的功率节约种类。
根据本发明的优选实施例,提供的方法可以由用户设备通过发送用于发起功率节约过程的请求来启动。尽管这样,关于功率节约种类的激活以及它的合适参数的最终决定优选地由BS做出。
根据本发明的再另一个实施例,功率节约种类从组中选择,所述组由以下组成:
类型1种类,特征在于每个睡眠窗口的持续时间是从它前面的睡眠窗口的持续时间得到,而侦听窗口的持续时间保持不变;
类型2种类,特征在于所有睡眠窗口具有相同的持续时间并与具有固定持续时间的侦听窗口交织;和
类型3种类,特征在于包括单个睡眠窗口和单个侦听窗口。
优选地,功率节约的类型1种类特征还在于,在睡眠窗口和侦听窗口的持续时间期间不允许交换业务量。
仍然通过本发明的另一个实施例,类型2功率节约种类特征还在于,在侦听窗口的持续时间期间阻止业务量交换。
根据本发明的再另一个实施例,类型3功率节约种类特征还在于,在睡眠窗口持续时间期间没有业务量被交换。
根据本发明的再另一个方面,提供了控制器,用于控制在用户设备中允许的功率节约时期的持续时间,其中优选地通过使功率节约种类去激活来完成控制。
优选地,当业务属于类型1种类,响应于一个或多个下述事件的发生而实现功率节约种类的去激活:
BS(在可用窗口期间)在属于该功率节约种类的连接上发送一些量的数据;
终端发送关于属于所述功率节约种类的业务(连接)的带宽的非零数量的请求;
所述终端从BS接收指示寻址到所述终端的缓存业务量存在的消息;
所述终端在特定超时间隔中,例如,侦听窗口内,不能接收业务量指示消息。
根据本发明的又另一个实施例,响应于由BS或由终端发起的明确请求而实现功率节约种类的去激活。
通过本发明的又另一个实施例,响应于从BS和/或用户设备以预定义管理消息的形式发送的明确请求(例如,终止请求)而实现业务类型2种类的功率节约种类的去激活。
根据本发明的又另一个实施例,当业务属于类型3种类,响应于侦听窗口时期的期满而实现功率节约过程的去激活。
根据本发明的又另一个实施例,提供了一种基站,适于在无线网络中操作并包括:
可操作的以允许在所述基站和与其关联的通信网络之间通信的接口;
至少一个无线电收发器,能够发送通信业务量到至少一个用户设备并从中接收通信业务量,其中所述基站能够提供给所述用户至少两种不同的业务,每个业务的特征在于与该业务关联的业务量要求相关的一个或多个特性;
倘若有至少两个不同的与用户设备支持的业务关联的功率节约种类,则可操作的以基于它们的业务量需求相关的特性将所述至少两个不同业务中的每个业务分类成它们相应的功率节约种类的装置;
至少一个处理器,适于:
对于每个所述功率节约种类,确定需要的侦听窗口和可能的睡眠窗口;
与所述用户设备交换消息以同步至少一个用于实现功率节约过程的参数;
在所述至少两个不同业务的提供期间,确定对于用户设备的不可用时间窗口,其中在所述基站和所述用户设备之间将没有通信被交换;和
发起命令,由此所述用户设备被要求对于所述不可用窗口的持续时间激活功率节约过程。
根据本发明的又另一个方面,提供有一种用户终端,适于在无线网络中操作并接收至少两个不同的业务,每个业务的特征在于与该业务关联的业务量需求相关的一个或多个特性,其中所述用户终端包括:
可操作的以允许在所述用户终端和基站之间通信的接口;
至少一个无线电收发器,可操作的以发送通信业务量至所述基站并从中接收通信业务量;
至少一个处理器,适于与所述基站交换消息以同步至少一个用于实现功率节约过程的参数;和
功率控制器,可操作的以响应于从所述基站接收的预定义消息,对于不可用时间窗口的持续时间,实行所述至少一个无线收发器的功率降低,在该持续时间内在所述基站和所述用户终端之间将没有通信被交换。
优选地,该至少一个处理器还适于发起用于向基站发送通信的请求,由此基站被请求以估计是否和/或何时用户终端可以开始功率节约过程。
通过另一个实施例,用户终端还适于响应于从基站接收的合适的消息和/或信号而影响功率节约过程。
附图简述
图1示出对于多播业务类型的功率节约过程的例子;
图2示出对于周期测距的功率节约过程的例子;和
图3示出带有两个功率节约种类的类型的睡眠操作模式的例子,一个与承载WEB类型的业务量的业务(连接)相关联,另一个与在IEEE802.16出版物中描述的UGS业务(例如,Voice over IP)相关联。
具体实施方式
本发明现在将通过例子加以描述,并不限制上述的普遍性。
根据由本发明提供的优选实施例,用户终端包括多个睡眠状态机(“SSM”),其中术语“睡眠状态”指的是处于睡眠时间窗口中或侦听窗口中。每一个SSM与包括一个或多个业务的功率节约种类(“PSC”)相关联,所有业务的特征在于具有基本类似的业务量需求行为(例如,当一个传输的包到达时,对于发送包的需求)。类似地,基站(BS)包括与该BS关联的用户终端的那些SSM相应的一组SSM。BS和各种用户终端交换控制消息以同步SSM的状态。对于下行链路(DL)或上行链路(UL)传输,用户终端的非可用性被定义为这样一个状态,其中所有状态机处于“睡眠”状态。当处于非可用状态时,用户终端可以断电一个或多个物理操作组件或执行其与BS通信无关的其它活动。根据本发明的一个实施例,BS包括对于由BS支持的业务种类需要的全部SSM,而包括在用户终端内的SSM只是与由该终端提供的所有业务的不同种类相对应的那些SSM。
我们现在考虑图1,其中是终端的例子的说明,该终端具有两个SSM,每一个SSM相应于不同的PSC。种类A包括若干个业务,特征可以在于属于在IEEE 802.16出版物中定义的“尽力”(Best Effort)类型和属于非实时类型。这个例子的种类B包括单个业务,VoIP(在IEEE802.16出版物方面定义为“UGS”)。BS为种类A分配每个都具有固定持续时间的侦听窗口和双倍睡眠窗口的序列,双倍睡眠窗口即每个窗口(除了跟随功率节约种类的激活的第一个窗口)持续它的在前睡眠窗口时间的两倍。对于种类B,BS分配每一个都具有固定持续时间的侦听窗口的序列和睡眠窗口的交织序列,每一个睡眠窗口也具有固定持续时间,不一定等于侦听窗口的持续时间。在所有分类都具有它们睡眠窗口的那些时间段内,或换句话说,当种类A的睡眠窗口与种类B的那些睡眠窗口交叠时,则认为终端处于不可用(因此可以断电)。
通过另一个优选实施例,BS保留一个或多个侦听/睡眠方案,适用于与BS关联的每一个用户终端,其中每一个方案与特定的功率节约种类(PCS)相关。如前面解释的,功率节约种类是一组MAC连接(业务),其具有共有的功率需求特性。对于本领域技术人员可以理解,所有“尽力”连接(例如,如在IEEE 802.16出版物中定义的)可以属于单个种类,因此它们将都具有相同的睡眠/侦听窗口。另一方面,可能出现情况,其中两个UGS连接(业务)可能每个属于一个不同的种类,在该情况中它们在随后的分配之间与不同时间间隔相关联。激活特定PSC的意义在于,事实上是发起与该种类关联的睡眠/侦听窗口序列。为了确定一个或若干个PSC和/或激活它们的目的,BS和相应的用户终端在它们之间交换特定的管理消息,以指定可应用的PCS的类型和参数以及激活睡眠/侦听窗口序列的时刻。
在如上所述确定对于每个可应用业务的可能的睡眠窗口之后,确定不可用间隔,如所有激活的SSM处于“睡眠”状态的那些间隔。
此处术语“可用间隔”被用于指示时间间隔,其不与任何不可用间隔相重叠。通过使用与正常操作(非睡眠)中实施的一个方案相同的方案,在可用间隔内期望终端接收所有下行链路(“DL”)传输。
如在上文中提到的,由这个例子提出的第二业务是VoIP(种类B)。在这种情况中,周期性地出现对于数据固定部分的传输需求,所以终端被提供具有不变持续时间的侦听窗口,所述侦听窗口将应用在大约期望终端操作(例如发送或接收数据)的时刻,睡眠窗口提供在这些侦听窗口之间。在侦听窗口时期期间的数据传输优选地在没有中止睡眠状态的情况下而被允许。通过这个优选的实施例,克服了现在实施的睡眠方案中的一个缺点,即每次VoIP需求出现时,不再需要BS来终止睡眠过程、配置数据传送和重启睡眠过程。
如果种类B包括代替上面讨论的VoIP业务的语音业务,则可以应用类似的解决方法。
下面是实施本发明的方法的例子,其中BS适于为用户终端提供分类成下面三个种类的那些种类之外的任意业务的组合。
类型1的功率节约种类:
与这个类型关联的网络业务的例子是WEB浏览和与远程文件服务器的通信。
为了在使用包括在该种类中的任何一个业务的BS和用户终端之间建立合适的操作性,BS和终端交换指定至少下面参数的消息:
发起-睡眠窗口“Initial-sleep window”;
侦听窗口“Listening window”;
最终-睡眠窗口“Final-sleep window”;和
第一睡眠窗口的开始时间“Start time for the first sleepwindow”。
在指定为第一睡眠窗口的开始时间的时刻,功率节约方案变为激活。每个下一个睡眠窗口的持续时间(大小)可以从它前面的睡眠窗口大小中导出。例如,每个下一个睡眠窗口可以是前一个窗口大小的两倍,但是规定了不大于参数“最终-睡眠窗口”的值。另外,在侦听窗口期间,BS可以周期性地发送指示寻址到终端的缓存DL业务量存在/不存在的一个或多个消息。
睡眠窗口典型地与侦听窗口交织,而后者具有固定的持续时间。
例如,BS终端通过发送业务量指示消息(例如,在IEEE 802.16出版物中的MOB_TRF-IND)激活状态。业务量指示消息将在每个侦听窗口期间被BS发送以警告终端在相应连接上出现DL业务量需求。
当终端在接收正确的MOB_TRF-IND消息指示后接收UL分配时,终端可以通过至少BR消息的传输来确认消息的接收。
在功率节约种类的激活状态期间,不期望终端在属于该功率节约种类的连接上发送带宽请求或发送或接收任何数据(例如,MAC SDU)。
在指定为第一睡眠窗口的开始时间的时刻,功率节约过程变为激活。每个下一个睡眠窗口是相对于前一个睡眠窗口大小的两倍,但是不大于指定的最终值。
功率节约过程响应于一个或多个下述事件的发生而被去激活:
●BS(在可用窗口期间)在属于该功率节约种类的连接上发送MAC SDU或它的片断;
●终端发送关于属于该功率节约种类的业务(连接)的非零数量的带宽请求;和
●终端接收业务量指示消息(例如,在IEEE 802.16出版物中的MOB_TRF-IND),该消息指示寻址到终端的缓存业务量的存在。
●在特定的超时间隔期间,例如,在侦听窗口期间,终端没有接收到业务量指示消息(例如,在IEEE 802.16出版物中的MOB_TRF-IND)。
在侦听窗口期间,如在正常操作(非睡眠)状态中同样的方式,期望终端接收所有的DL传输。
类型2的功率节约种类:
与这个类型关联的业务的例子是如在IEEE 802.16出版物中指定的UGS,RT-VR类型,例如语音(VoIP)连接(业务)和实时业务。
为了在使用包括在该种类中的任意一个业务的BS和用户终端之间建立合适的互操作性,BS和终端交换指定至少下面参数的消息:
发起-睡眠窗口“Initial-sleep window”;
侦听窗口“Listening window”;和
第一睡眠窗口的开始时间“Start time of the first sleepwindow”。
这个类型的功率节约种类在“第一睡眠窗口的开始时间”指定的时刻变为激活。所有睡眠窗口有相同的大小并与具有固定持续时间的侦听窗口交织。一旦开始,激活状态持续直到通过终止关联连接(业务)或通过指明该终止的特定管理消息的交换而明确终止所述激活状态。
与上面描述的类型1的功率节约种类不同,在类型2的功率节约种类的侦听窗口期间,终端可以在连接(业务)上发送或接收任何数据,该连接(业务)包括在该功率节约种类中。
功率节约种类在“第一睡眠窗口的开始时间”指定的帧变为激活。所有睡眠窗口与初始窗口大小相同。睡眠窗口与具有固定持续时间的侦听窗口交织。应用于该类型的功率节约过程通过特定控制消息(例如,在IEEE 802.16出版物中的MOB_SLP-REQ/MOB_SLP-RSP事务)被定义/激活/去激活。BS可以发送未经请求的消息以发起功率节约过程的激活(例如,在IEEE 802.16出版物中的MOB_SLP-RSP)。一旦开始,激活状态持续直到由如在IEEE 802.16出版物中的MOB_SLP-REQ/MOB_SLP-RSP的特定消息明确终止。BS可以发送未经请求消息(在IEEE 802.16出版物中的MOB_SLP-RSP)以去激活功率节约种类。
与类型1的功率节约种类的过程相反,在侦听窗口期间,终端可以在与该类型功率节约种类关联的连接上发送或接收数据。
类型3的功率节约种类:
与这个类型关联的业务的例子是广播/多播连接以及诸如测距、连接设置/改变/删除的管理操作。这个类型的功率节约种类通过诸如在IEEE802.16出版物中的MOB_SLP-REQ/MOB_SLP-RSP事务的特定管理消息而定义/激活。PSC的去激活随着侦听窗口的期满而自动发生。
为了在使用包括在该种类中的任意一个业务的BS和用户终端之间建立合适的操作性,BS和终端交换由至少下面参数所指定的消息:
●最终-睡眠窗口“Final-sleep window”(其可以作为基数/指数被编码);
●第一睡眠窗口的开始时间“Start time of the firstsleep window”;和
●侦听窗口“Listening window”。
该功率节约种类在指定为“第一睡眠窗口的开始时间”的时刻变为激活。指定大小的侦听窗口将跟随睡眠窗口。
指定大小的侦听窗口跟随睡眠窗口。一旦侦听窗口期满,功率节约过程自动变为非激活。
图2说明使用与多播连接关联的类型3的PSC的方法。在多播业务的提供中,BS假设下个数据部分出现的时间。根据该假设,BS分配睡眠间隔,该睡眠间隔延伸到不期望多播业务量到达的整个时期。如果在侦听窗口期间有多播数据可用,则该多播数据将被发送到相关的终端。一旦侦听窗口已经期满,BS可以作出是否重新激活功率节约种类的决定。
类型3的功率节约种类还可以被用于控制如MAC连接的建立或删除、或测距的过程,在这个情况中,BS发送请求并指定睡眠窗口的持续时间(例如,基数/指数)等于在下个周期性测距事务之前需要的时间间隔。然后在指定时间间隔期满之后,终端将可用于DL传输并因此BS也可以分配UL传输机会用于测距。
这个类型的功率节约种类将在所有涉及的连接关闭后自动地去激活。
睡眠请求和睡眠响应消息
终端支持睡眠过程使用MOB_SLP-REQ消息以请求类型1和2的某些功率节约种类的定义和/或激活。根据终端的基本CID,MOB_SLP-REQ消息从终端发送至BS。
表1睡眠请求消息格式
  语法   大小
MOB_SLP-REQ Message_Format(){
      Management message type=50   8比特
      Number_of_Classes   4比特
for(i=0;i<Number_of_Classes;i++){
        Power_Saving_Class_Type   2比特
        Definition   1比特
        Operation   1比特
      If  (Operation=1){
          Start_frame_number   8比特
      }
      if  (Definition=1){
          Initial-sleep window   8比特
          listening window   8比特
          final-sleep window base   10比特
          final-sleep window exponent   3比特
          Number_of_CIDs   3比特
        for  (i=0;i<No._of_CIDs;i++){
             CID   16比特
          }
      }
  }
使用的参数如下面:
Definition(定义)
1=功率节约种类存在的定义
Operation(操作)
1=功率节约种类的激活
0=功率节约种类的去激活(只对于类型1和2)
Power_Saving_Class_ID
指定功率节约种类标识符。在与终端关联的功率节约种类的组中ID将是唯一的。该ID还可以被用在用于功率节约种类激活/去激活的MOB_SLP-REQ/RSP消息中。
Start_frame_number
第一睡眠窗口的开始帧号。
Listening interval
指定终端侦听间隔的持续时间(以帧衡量)。对于功率节约种类类型2,该持续时间是不相关的并必须被编码为0。
Initial-sleep window
指定睡眠窗口的初始持续时间(以帧衡量)。对于功率节约种类类型2,该初始持续时间是不相关的并必须被编码为0。
Final-sleep window base
指定睡眠间隔的最终值(以帧衡量)。对于功率节约种类类型2,该最终值是不相关的并必须被编码为0。对于功率节约种类类型2,该最终值是由消息请求的单个睡眠窗口的持续时间的基数。
Final-sleep window exponent
指定因数,final-sleep window base乘以该指定因数以计算final-sleep window。使用下面的公式:
final-sleep window=final-sleep window base×2^(final-sleep window exponet)
对于功率节约种类类型2,该指定因数是用于由消息所请求的单个睡眠窗口持续时间的指数。
CID
包括功率节约种类的所有连接的CID。该列表包括单播连接、多播连接或管理连接,但是没有不同类型连接的组合。如果基础CID被编码,其意味着所有的终端连接都被包括在单个的类中。
CID=0被保留用于管理操作。
响应于MOB_SLP-REQ消息,根据终端的基础CID,MOB_SLP-RSP消息将从BS发送到终端,或者可以被未经请求地发送。终端将集合在功率节约种类中的连接并如在消息中所描述的选择性地激活它们。如果对于某个种类激活被推迟(Activation=‘0’),BS可以在稍后的时间以未经请求的MOB_SLP-RSP消息通过信号激活。
表2 Sleep-Response消息格式
  语法   大小
MOB_SLP-RSP Message_Format( ){
    Management message type=51   8比特
    Number_of_Classes   4比特
    for(i=0;i<Number_of_Classes;i++){
    Power_Saving_Class_Type   2比特
    Definition   1比特
    Operation   1比特
    Reserved   2比特
    Power_Saving_Class_ID   6比特
    If(Operation=1){
    Start_frame_number   8比特
    }
    if(Definition=1){
    Initial-sleep window   8比特
    listening window   8比特
    final-sleep window base   10比特
    final-sleep window exponent   3比特
    Number_of_CIDs   3比特
    for(i=0;i<Number_of_CIDs;i++){
      CID   16比特
     }
   }
 }
使用的参数如下:
Power_Saving_Class_Type
请求的功率节约种类类型
Definition
1=功率节约种类出现的定义
Operation
1=功率节约种类的激活
0=功率节约种类的去激活(只对于类型1和2)
Power_Saving_Class_ID
指定功率节约种类标识符。在与终端关联的功率节约种类的组中ID将是唯一的。该ID还可以被用在用于功率节约过程激活/去激活的MOB_SLP-REQ/RSP消息中。
Start_frame_number
第一睡眠窗口的开始帧号。
Listening interval
指定终端侦听间隔的持续时间(以帧衡量)。对于功率节约种类类型2,该持续时间是不相关的并必须被编码为0。
Initial-sleep window
指定睡眠窗口的初始持续时间(以帧衡量)。对于功率节约种类类型2,该初始持续时间是不相关的并必须被编码为0。
Final-sleep window base
指定睡眠间隔的最终值(以帧衡量)。对于功率节约种类类型2,该最终值是不相关的并必须被编码为0。对于功率节约种类类型2,该最终值是由消息请求的单个睡眠窗口的持续时间的基数。
Final-sleep window exponent
指定因数,final-sleep window base乘以该指定因数以计算final-sleep window。使用下面的公式:
final-sleep window=final-sleep window base×2^(final-sleep window exponet)
对于功率节约种类类型2,该指定因数是由消息请求的单个睡眠窗口的持续时间的指数。
CID
所有连接的CID包括功率节约种类。该列表应包括单播连接、多播连接或管理连接,但是没有不同类型连接的组合。如果基础CID被编码,则意味着所有的终端连接都包括在单个的类中。
CID=0被保留用于管理操作。
应当认识到上述方法可以以多种方式改变,包括步骤次序的改变,并使用准确的实施。
通过使用优选实施例的非限制性详细描述,已经描述了本发明,该优选实施例通过例子的方式被提供并不是意指限制本发明的范围。应当理解参照一个实施例描述的特性可以被用于其他实施例,并不是本发明的所有实施例都具有在特定附图中示出的所有特性。本领域技术人员可以对所述的实施例进行变化。此外,术语“包含”、“包括”、“具有”和它们的动词变化将意味着当在权利要求中使用它们时,这些术语的含义是“包括但不一定局限于”。本发明的范围仅由下面的权利要求书所限定。

Claims (14)

1、一种用于在与无线网络关联的用户设备中实现功率节约的方法,该无线网络包括基站和至少所述用户设备,其中所述用户设备可操作以接收至少两个不同的业务,所述至少两个不同业务中的每个业务其特征在于与该业务关联的业务量需求相关的一个或多个特性,该方法包括:
倘若有与所述至少两个不同业务关联的至少两个不同的功率节约种类,则基于它们的业务量需求相关特性,将所述至少两个不同业务的每个业务分类成相应的功率节约种类;
对于所述功率节约种类的每个功率节约种类,确定需要的侦听窗口和需要的睡眠窗口;
在所述基站和所述用户设备之间交换消息以同步用于实现功率节约过程的参数。
2、根据权利要求1的方法,还包括所述用户设备发送用于发起功率节约过程的请求的步骤。
3、根据权利要求1或2中的任意一个的方法,其中所述种类的类型从组中选择,所述组由下面组成:
类型1,特征在于每个所述睡眠窗口的持续时间不是预定义的,而是从它前面的睡眠窗口的持续时间得到,而所述侦听窗口的持续时间保持不变;
类型2,特征在于所有睡眠窗口具有相同的持续时间并与具有固定持续时间的侦听窗口交织;和
类型3,特征在于类型3包括单个睡眠窗口和单个侦听窗口。
4、根据权利要求3的方法,其中所述类型1的功率节约种类特征还在于,在睡眠窗口和侦听窗口的持续时间期间,不允许与包括在所述种类中的业务相关的业务量交换。
5、根据权利要求3的方法,其中所述类型2的功率节约种类特征还在于,在侦听窗口的持续时间期间,允许与包括在所述种类中的业务相关的业务量交换。
6、根据权利要求3的方法,其中所述类型3的功率节约种类特征还在于,在睡眠窗口的持续时间期间不允许业务量交换。
7、根据权利要求4的方法,其中提供的业务属于所述类型1或类型2,其中所述方法还包括通过在所述基站和所述用户设备之间管理消息的交换来去激活所述功率节约过程的步骤。
8、根据权利要求7的方法,其中所述去激活类型1的功率节约种类的步骤响应于一个或多个下面事件的发生而实现:
所述基站在可用窗口期间在属于该功率节约种类的连接上发送任意量的数据;
所述用户设备发送关于属于所述功率节约种类的业务(连接)的带宽的非零数量的请求;
所述用户设备接收指示寻址到所述用户设备的缓存业务量存在的业务量指示消息;
所述用户设备在特定超时间隔中不能接收业务量指示消息。
9、根据权利要求7的方法,其中所述去激活类型2的功率节约种类的步骤响应于明确请求而实现,该明确请求以预定义的管理消息的形式从所述基站和/或所述用户设备发送。
10、根据权利要求7的方法,其中所述去激活业务种类类型3的功率节约模式的步骤响应于侦听窗口的期满而实现。
11、一种适于在无线网络中操作的基站,包括:
可操作的以允许在所述基站和与其关联的通信网络之间通信的接口;
至少一个无线电收发器,能够发送通信业务量到至少一个用户设备并从中接收通信业务量,其中所述基站能够提供给所述用户至少两种不同的业务,每个业务的特征在于与该业务关联的业务量要求相关的一个或多个特性;
倘若有至少两个不同的与用户设备支持的业务关联的功率节约种类,则可操作的以基于它们的业务量需求相关的特性将所述至少两个不同业务中的每个业务分类成它们相应的功率节约种类的装置;
至少一个处理器,适于:
对于每个所述功率节约种类,确定需要的侦听窗口和可能的睡眠窗口;
与所述用户设备交换消息以同步至少一个用于实现功率节约过程的参数;
在所述至少两个不同业务的提供期间,确定对于用户设备的不可用时间窗口,其中在所述基站和所述用户设备之间将没有通信被交换;和
发起命令,由此所述用户设备被要求对于所述不可用窗口的持续时间激活功率节约过程。
12、一种用户终端,适于在无线网络中操作并接收至少两种不同业务,每个业务的特征在于与该业务关联的业务量要求相关的一个或多个特性,其中所述用户终端包括:
可操作的以允许在所述用户终端和基站之间通信的接口;
至少一个无线电收发器,可操作的以发送通信业务量至所述基站并从中接收通信业务量;
至少一个处理器,适于与所述基站交换消息以同步至少一个用于实现功率节约过程的参数;和
功率控制器,可操作的以响应于从所述基站接收的预定义消息,对于不可用时间窗口的持续时间,实行所述至少一个无线收发器的功率降低,在该持续时间内在所述基站和所述用户终端之间将没有通信被交换。
13、根据权利要求12的用户终端,其中所述至少一个处理器还适于发起请求用于发送通信至所述基站,由此基站被请求以估计是否和/或何时所述用户终端可以开始功率节约过程。
14、根据权利要求12的用户终端,还适于响应于从所述基站接收的合适的消息和/或信号实行功率节约过程。
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