CN1701589A - 基于时钟的时间分片 - Google Patents

基于时钟的时间分片 Download PDF

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CN1701589A
CN1701589A CNA038027364A CN03802736A CN1701589A CN 1701589 A CN1701589 A CN 1701589A CN A038027364 A CNA038027364 A CN A038027364A CN 03802736 A CN03802736 A CN 03802736A CN 1701589 A CN1701589 A CN 1701589A
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content
burst
relative time
time cycle
portable terminal
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基莫·莱霍
托米·奥拉宁
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Nokia Oyj
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    • 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
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Abstract

公开了一种允许移动终端(204)周期性地去除至少一些组件的电力的系统。所述移动终端接收内容突发(502)。一些所述内容突发包括识别后续内容突发的传输时间的相对时间信息(504)。所述移动终端可能在所述移动终端并未被安排接收内容突发的期间中,去除接收模块的电力(506)。

Description

基于时钟的时间分片
技术领域
本发明涉及一种广播系统。本发明尤其提供了一种减少所传送突发之间的移动终端的功率消耗的系统和方法。
背景技术
常规数字视频广播(DVB)系统将内容流经由传输媒体传送到数字视频广播接收机。所述传输媒体通常包括同轴电缆、卫星或无线广播站。每种传输媒体都具有有限带宽,通常将可用带宽分为多个信道。图1示出了被传送到数字视频广播接收机的典型传输流100。如图1所示,所述典型的传输流是连续的,并占用小于信道最大带宽的带宽。
移动终端正日益被用于将新业务提供给用户。移动终端日益流行,因为其重量轻且无须连接到诸如标准电子电源插座的固定电源。移动终端的一个限制是其电池寿命。处理诸如流式内容的低比特率内容对于移动终端电池的寿命具有消极影响。因此,用户仅可在有限时间周期内接收和浏览流式内容。解决由接收和处理流式内容导致的有限电池寿命问题的现有技术方案包括,携带额外电池和利用更昂贵或更大的电池。现有技术方案显然减损了移动终端的吸引力。
因此,技术上存在着对于这样一种系统和方法的需要,所述系统和方法允许移动终端在有效利用其电池的同时接收和处理流式内容。
发明内容
一个或多个上述技术需要由所公开系统和方法满足,所述系统和方法周期性地从移动终端的至少一些组件去除电力。流式内容或突发性内容被转换为具有大于原始内容的带宽的内容突发。可能会在接收内容突发的时间周期之间从接收模块去除电力。与突发定时有关的相对定时信息可能包括在所述突发内。除了其它优点之外,使用相对定时信息允许移动终端从接收模块去除电力,而无需与广播源严格地同步并计算等待时间延迟。
本发明的第一实施例提供了一种用于提供流式内容的方法。所述方法包括接收包括内容的连续信息流,以及生成包括所述内容的部分的第一与第二突发。在所述第一突发中执行第一相对时间周期的编码,其中所述第一相对时间周期在所述第一突发的传输与所述第二突发的传输之间。
在另一实施例中,提供了一种处理在移动终端处所接收内容数据的突发的方法。所述方法包括接收所述内容的第一突发,并提取直至传输内容的第二突发的相对时间周期。在接收内容的所述第一突发之后,在短于所述相对时间周期的时间周期内,从所述移动终端的至少一部分去除电力。
在本发明的又一实施例中,提供了一种处理内容突发的移动终端。至少一些所述内容突发包括与下一突发相关的相对时间信息。所述移动终端包括接收内容突发的接收模块,以及被配置为从所述内容突发提取相对时间周期的提取模块。功率管理模块在对应于所述相对时间周期的断电时间周期内,至少从所述接收模块去除电力。
在本发明的其它实施例中,用于实施所公开方法的计算机可执行指令被存储在计算机可读媒体上。
附图说明
本发明被借助实例示出,并不仅限于附图,在所述附图内,相同的参考号指示类似的单元,其中:
图1示出了一种被传送到数字视频广播接收机的典型传输流;
图2示出了一种根据本发明实施例的用于传送和接收内容突发的系统;
图3示出了已被根据本发明实施例格式化的内容突发;
图4示出了一种根据本发明实施例的传送内容突法的方法,所述内容突发包括移动终端的相对定时信息;
图5示出了一种根据本发明实施例的、由移动站用于接收和处理内容突发的方法;以及
图6示出了根据本发明实施例的在自适应字段内包括相对定时信息的MPEG II传输流分组。
具体实施方式
图2示出了一种根据本发明实施例的用于传送和接收内容突发的系统。所述内容可能包括音频内容、视频内容和/或数据。数据转发器202将内容突发经由数字视频广播网络206传送到移动终端204。单个移动终端仅是出于示例性目的而示出的,应当理解的是,数据转发器202可能将内容突发传送到多个移动终端或其它设备。数字视频广播网206可能包括同轴电缆、无线传输站、卫星或其它传输媒体。当然,本发明的各个方面可能使用除数字视频广播网络之外的其它网络,例如纯互联网协议网络。
数据转发器202可能在缓存器210处接收信息信号208。缓存器210可能是存储信息信号208的段的存储器。间隔模块212可能被用于确定传输内容的突发之间的相对时间周期。由间隔模块212确定的相对时间周期可能是网络206的最大带宽、网络206的信道的最大带宽或诸如所述数据转发器和/或移动终端的功率管理效率的其它因数的函数。
多协议封装器214可能被用于格式化将被传送到所述网络的内容。在本发明的一个实施例中,由间隔模块212确定的相对时间周期被封装在由多协议封装器214格式化的内容内。间隔模块212可能会使用时间源216来计算内容突发之间的相对时间周期。可能以计算机可执行的指令来编程处理器218,以从多协议封装器214接收所述内容,并将所述数据格式化为具有间隔模块212所确定的带宽和间隔的突发。
图3示出了一系列由处理器218执行的处理所导致的突发302、304和306。与图1所示的常规传输流100不同,图3所示的突发302、304和306是周期性的,并几乎消耗所有可用信道带宽。如下所述,图3所示的传输方案的优点之一在于,可在接收突发之间从移动终端204的组件去除电力。例如,在时间周期t1和t2之间,移动终端204处并未接收内容。因此,可能会至少从接收模块222去除电力。电力也可以在时刻t3和t4之间移出。本领域技术人员应当理解的是,从移动终端204的任何组件去除的任何电力都可被在突发之间的时间间隔到期之前不久再运用,以确保所述移动终端204准备好接收下一个传送的突发。
传输模块220将所述内容突发传送到网络206,以最终递送到移动终端204。当然,本发明的各个方面可能与包括多个信息源208的系统一起使用。对应的附加内容突发可能被在网络的不同信道内传送,或被第一组内容突发时间分片复用。传输模块220可能包括用于执行时间分片复用的组件。所述组件随时可用,为本领域技术人员所熟知。
接收模块222可能耦合到缓存器224。缓存器224可存储所接收的内容突发用于以后的处理。提取模块226可被用于从所接收的内容突发中提取所述相对时间周期。时间源228可被用作本地时间源。在一个实施例中,时间源228可能会从标准传输流时间和数据列表中提取时间信息。然而,因为定时信息优选的是相对的而非绝对的,因此不必使所述数据转发器和移动终端与公共时间源同步。所述数据转发器和移动终端可能具有独立的时间源。
移动终端204可能包括功率管理模块230,所述功率管理模块230接收提取模块226所提取的相对定时信息,以及从时间源228接收的时间信息,以去除电力以及将电力应用于接收模块222。如上所述,可能在其中移动终端204并未接收到内容突发的时刻,至少从接收模块222去除电力。可能会包括处理器232,以执行诸如接收存储在缓存器224内的内容突发并生成连续内容流的功能。
移动终端204可被借助移动电话、个人数字助理或其它用于将音频、数据和/或视频内容提供给用户的便携电子设备来实施。因此,移动终端204可能包括用于将视频内容显示给所述用户的显示器234,和/或用于将音频内容呈现给用户的扬声器236。
功率管理模块230基于相对时间周期信息选择性地将电力应用于移动终端204的一个或多个组件。因此,无需使时间源216和时间源228同步。每个时间源都具有预定的精确度就已足够。所述预定精确度可能是基于移动终端204的效率要求来选择的。相对而言更为精确的时间源允许移动终端204在预期接收突发之前的更短时间周期内使用电力。在时间源精确度较差的情况下,必须更快地使用电力,以补偿所述的非精确度,并确保移动终端204准备好接收突发。使用相对时间周期信息的另一优点在于可自动考虑等待时间延迟。尤其是,由于连续突发的等待时间延迟很可能实质上是相同的,因此相对时间周期信息足以确定何时使用和去除电力。
图4示出了一种根据本发明实施例的用于将包括相对定时信息的内容突发传送到移动终端的方法。首先,在步骤402中,所述数据转发器接收内容流。所述内容流可能是连续的。所述内容流可能是从诸如电视台的信息源接收的常规信息信号。作为选择,所述内容流可能是诸如传输流100(图1所示)的常规传输流。
然后,所述数据转发器在步骤404中生成包括部分所述内容的第一突发。所述第一突发的带宽大于在步骤402内接收的原始内容流的带宽。类似地,所述数据转发器在步骤406内生成包括部分所述内容的第二突发。
然后,所述数据转发器在步骤408内确定传输所述第一与第二突发之间的相对时间周期。所述相对时间周期可能是所述原始内容流的内容、所述传输媒体的可用带宽或所述传输媒体的信道的带宽的函数。在步骤410内,将所述相对时间周期在内容数据的第一突发内编码。所述相对时间周期可能包括在互联网协议(IP)分组、多协议封装帧、其它任何分组帧、诸如发射机参数信令的3G或GPRS信道或调制数据内。
在步骤412中,所述第一突发被传送到所述传输媒体。在所述相对时间周期过去之后,所述第二突发被在步骤414中传送到所述传输媒体。
所述相对时间周期可能会识别从传输一个突发开始到传输另一突发开始的时间周期。所述突发的持续时间也可能包括在其内。在本发明的一个实施例中,每个突发都可能包括确定传输后续突发之间的时间的相对时间周期信息。例如,所述第二突发可能包括确定传输第三突发之前的时间长度的相对时间周期。在本发明的其它实施例中,可能仅在传输突发之间的所述相对时间周期改变时,将相对时间周期信息包括在突发内。
图5示出了一种根据本发明实施例的由移动终端用于接收和处理内容突发的方法。首先,在步骤502中接收内容的第一突发。所述突发可能被在接收模块222(图2所示)处接收。在步骤504中,从所述第一突发提取第一相对时间周期。所述第一相对时间周期确定传输所述第一突发与传输所述第二突发之间的时间间隔。
在步骤506中,在小于所述第一相对时间周期的时间周期内,从所述移动终端的至少一部分去除电力。如上所述,在所述第一相对时间周期到期之前不久,将电力应用于从其去除电力的组件,以确保所述移动终端被配置为并且准备好接收内容的附加突发是理想的。在本发明的一个实施例中,从接收模块222去除电力。接收模块222可能包括相对而言消耗大量功率的组件,例如解调器。当然,移动终端204可能被配置为使得功率被选择性应用于附加组件。例如,可能会在接收内容突发之间从移动终端的几乎所有组件去除电力。例如,当所述移动终端正在接收随后将提供给用户的内容时,可从几乎所有所述组件移出电力。移动终端204可接收所述内容,并将所述内容存储在存储器内以便随后检索。
在步骤508中,电力被提供给从其去除电力的组件,且所述移动终端接收内容的第二突发。所述移动终端可能还被配置为检查内容的所有突发,以确定是否包括附加的相对时间信息。例如,移动终端204可能会检查内容的所述第二突发,以确定是否包括了传输所述内容的第二突发与传输所述第三内容突发之间的相对时间周期。最后,在步骤510中,根据包括在所述第一与第二突发内的内容生成连续的内容流。当然,可能根据包括在任何数量的突发内的内容来生成连续的内容流。
本发明的一个方面包括一种当突发丢失时操作移动终端的机制。突发可能会因为干扰或某个误差或错误条件而丢失。当突发丢失时,所述移动终端可能被配置为以恒定的通电状态操作,直至接收到另一突发。在一个实施例中,所述移动终端可能被编程为,在接收突发过去预定时间长度之后,以恒定的通电状态操作。所述预定长度时间可能被选择为略微超过突发间最大预期时间长度。
图6示出了其中相对定时信息被包括在MPEG II传输流分组的自适应字段502内的实施例。包括在MPEG II标题506内的自适应字段控制比特506可被用于信令发送自适应字段502内的相对定时信息的存在。在一个实施例中,自适应控制字段504包括两个比特。比特值“00”可能指示所述自适应字段是为未来使用而保留的,比特值“01”可能指示有效负荷是当前的,但自适应字段不是当前的,比特值“10”可能指示自适应字段是当前的,但有效负荷不是当前的,比特值“11”可能指示自适应字段和有效负荷都是当前的。
移动终端204可能被配置为分析自适应字段控制比特506,以确定相对定时信息是否包括在自适应字段502内。当存在时,所述相对定时信息然后可能由提取模块226提取,以供功率管理模块230以上述方式使用。
以上已参照移动终端描述了本发明。选择性地从移动终端的至少一些组件去除电力可提供更长的电池寿命。电力的选择性去除还可以减少干扰和/或减少热量的生成。因此,本发明的各个方面可与其它并不包括电池或并非移动的广播接收机一起使用。
尽管以上结合了包括执行本发明的当前优选模式的特定实例描述了本发明,但本领域技术人员应当理解的是,对上述系统和技术的许多修改和改变都属于本发明的精神与范围。

Claims (36)

1、一种提供流式内容的方法,所述方法包括:
(a)接收包含内容的信息流;
(b)生成包含所述内容的第一部分的第一突发;
(c)生成包含所述内容的第二部分的第二突发;以及
(d)在所述第一突发中编码第一相对时间周期,其中所述第一相对时间周期在所述第一突发的传输与所述第二突发的传输之间。
2、根据权利要求1的方法,还包括:
(e)将所述第一突发传送到传输媒体;以及
(f)在由所述第一相对时间周期所确定的时刻,将所述第二突发传送到所述传输媒体。
3、根据权利要求2的方法,其中所述第一突发的带宽对应于所述传输媒体的信道的最大带宽。
4、根据权利要求2的方法,其中所述第一突发的带宽小于所述传输媒体的信道的最大带宽。
5、根据权利要求2的方法,其中所述第一突发的带宽对应于所述传输媒体的最大带宽。
6、根据权利要求1的方法,还包括:
(e)在所述第二突发中编码第二相对时间周期,其中所述第二相对时间周期在所述第二突发的传输与第三突发的传输之间,并且所述第三突发包括一部分所述内容。
7、根据权利要求1的方法,其中步骤(d)还包括在所述第一突发中编码所述第一突发的持续时间。
8、根据权利要求1的方法,其中在步骤(d)中被编码的所述第一时间周期被编码在多协议封装帧中。
9、根据权利要求1的方法,其中在步骤(d)中被编码的所述第一时间周期被编码在互联网协议分组中。
10、根据权利要求1的方法,其中在步骤(d)中被编码的所述第一时间周期被编码在数字视频广播调制数据中。
11、根据权利要求1的方法,其中步骤(d)包括将所述相对时间周期编码到传输流分组的标题中。
12、根据权利要求1的方法,其中步骤(d)包括将所述相对时间周期编码到传输流分组的自适应字段中。
13、根据权利要求12的方法,其中所述传输流分组包括MPEG II传输流分组。
14、一种用于处理在终端中接收到的内容数据的突发的方法,所述方法包括:
(a)接收内容的第一突发;
(b)从所述第一突发中提取第一相对时间周期,直到传输所述内容的第二突发为止;以及
(c)在步骤(a)之后,在小于所述第一相对时间周期的时间周期中,去除所述移动终端的至少一部分的电力。
15、根据权利要求14的方法,其中所述至少一部分移动终端包括接收模块。
16、根据权利要求15的方法,其中所述接收模块包括分组滤波器。
17、根据权利要求14的方法,还包括:
(d)在步骤(c)之后,将电力提供给所述至少一部分的移动终端,并接收所述内容的第二突发;以及
(e)在步骤(d)之后,在小于所述第一相对时间周期的所述时间周期中,去除所述至少一部分的移动终端的电力。
18、根据权利要求17的方法,还包括:
(f)根据包含在所述第一突发与所述第二突发中的内容生成内容流。
19、根据权利要求14的方法,还包括:
(d)在步骤(c)之后,将电力提供给所述至少一部分的移动终端,并接收所述内容的第二突发;
(e)从所述第二突发提取第二相对时间周期,直到传输所述内容的第三突发为止;以及
(f)在步骤(d)之后,在小于所述第二相对时间周期的时间周期中,去除所述至少一部分的移动终端的电力。
20、根据权利要求19的方法,还包括:
(g)根据包含在所述第一突发与所述第二突发中的内容生成内容流。
21、根据权利要求14的方法,其中步骤(b)包括从多协议封装帧中提取所述第一相对时间周期。
22、根据权利要求14的方法,其中步骤(b)包括从互联网协议分组中提取所述第一相对时间周期。
23、根据权利要求14的方法,其中步骤(b)包括从数字视频广播调制数据中提取所述第一相对时间周期。
24、根据权利要求14的方法,其中步骤(b)包括从传输流分组的自适应字段中提取所述第一相对时间周期。
25、根据权利要求24的方法,其中所述传输流分组包括MPEG II传输流分组。
26、一种用于处理内容突发的移动终端,至少一些所述内容突发包括相对时间周期,所述移动终端包括:
接收模块,用于接收所述内容突发;
提取模块,其被配置为从所述内容突发提取所述相对时间周期;以及
功率管理模块,用于在对应于所述相对时间周期的断电时间周期内,至少去除所述接收模块的电力。
27、根据权利要求26的移动终端,还包括时间源,所述时间源耦合到所述功率管理模块,并且将相对时间信息提供给所述功率管理模块。
28、根据权利要求27的移动终端,还包括存储所述内容突发的缓存器。
29、根据权利要求28的移动终端,还包括根据所述内容突发生成连续内容流的处理器。
30、根据权利要求26的移动终端,其中所述提取模块从多协议封装帧中提取所述相对时间周期。
31、根据权利要求26的移动终端,其中所述提取模块从互联网协议分组中提取所述相对时间周期。
32、根据权利要求26的移动终端,其中所述提取模块从数字视频广播调制数据中提取所述相对时间周期。
33、根据权利要求26的移动终端,其中所述提取模块从传输流分组的自适应字段中提取所述相对时间周期。
34、根据权利要求33的移动终端,其中所述传输流分组包括MPEG II传输流分组。
35、一种用于处理内容突发的移动终端,至少一些所述内容突发包括相对时间数据,所述相对时间数据用以指示突发之间的相对时间,所述移动终端包括:
用于接收内容突发的装置;
用于从所述内容突发中提取相对时间周期的装置;以及
用于在对应于所述相对时间周期的断电时间周期内,至少去除所述用于接收的装置的电力的装置。
36、一种用于处理内容突发的接收机,至少一些所述内容突发包括相对时间周期,所述接收机包括:
接收模块,用于接收内容突发;
提取模块,其被配置为从所述内容突发中提取相对时间周期;以及
功率管理模块,其在对应于所述相对时间周期的断电时间周期内,至少去除所述接收模块的电力。
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