CN1082272A - 降低移动通信接收机功率消耗的装置和方法 - Google Patents

降低移动通信接收机功率消耗的装置和方法 Download PDF

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CN1082272A
CN1082272A CN93102803A CN93102803A CN1082272A CN 1082272 A CN1082272 A CN 1082272A CN 93102803 A CN93102803 A CN 93102803A CN 93102803 A CN93102803 A CN 93102803A CN 1082272 A CN1082272 A CN 1082272A
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小爱德华G·蒂德曼
小林塞A·韦弗
理查德J·克尔
肯尼思M·盖伯
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06Receivers
    • H04B1/16Circuits
    • H04B1/1607Supply circuits
    • H04B1/1615Switching on; Switching off, e.g. remotely
    • 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
    • H04W52/0216Power 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
    • 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
    • H04W52/0219Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave where the power saving management affects multiple terminals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2201/00Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70707Efficiency-related aspects
    • H04B2201/70709Efficiency-related aspects with discontinuous detection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
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    • H04W24/00Supervisory, monitoring or testing arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W68/00User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02Arrangements for increasing efficiency of notification or paging channel
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
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    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • HELECTRICITY
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    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/21Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • HELECTRICITY
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    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access, e.g. scheduled or random access
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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
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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
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Abstract

用以降低包括接收机和一个或多个接收机的通 信系统中接收机功耗的系统按“时间片”编排周期性 报文。各个接收机被分配到一时间片,在此期间它监 视发送。发送机仅在被分配时间片期间向接收机发 送报文。接收机在其被分配时间片期间处于“活动状 态”。在被分配时间片之后若报文需接收机执行另外 的动作它可以仍处于活动状态。在“不活动状态”期 间,即在其被分配时间片相继出现之间的时期,接收 机可以执行无需与发送机协调的任何动作。

Description

本发明涉及例如蜂窝式电话系统之类的移动通信系统,特别涉及一种降低这类系统的移动或便携式无线电收发机功率消耗的系统。
在许多通信系统中,无线电收发机仅仅偶而活动。例如没有呼叫时有较长期间蜂窝式电话处于闲置状态。在这类闲置期间蜂窝式电话实际上消耗与活动期间相同的功率总量。但要确保无线电收发机偶而接收发送来的报文,它必须连续地监视信道。在例如转让给本发明受让人的题为“控制CDMA蜂窝式电话系统传输功率的方法和装置”的美国专利5,056,031号和题为“产生CDMA蜂窝式电话系统中信号波形的系统和方法”的一同待审的美国专利申请07/543,496号中所描述的那一类数字式蜂窝电话系统中,由基地台发送的报文可能包括通知移动站有一个来向呼叫到达的报文和周期性地更新移动站系统参数的报文。
当移动站安装在车辆中时就可由车辆的电气系统供电,车辆不运行时移动站过长时间的使用会耗尽车辆的电池。况且多数移动站是便携式的,由内部电池供电。个人通信系统(PCS)的手持送受话器几乎都是专用电池供电。在任何这类站中希望使功率消耗最小以延长电池寿命。
对来向报文的信道进行连续监视使移动站会消耗显著量的电力。结果电池功率消耗殆尽使可用于有效处理呼叫的时间减少。在闲置期间对来向报文的信道进行周期性监视以降低功率消耗的系统是迫切希望的。在本技术领域中明显地感到这些问题和不足,故以如下所述方式由本发明解决。
本发明降低发送机在某一信道上与一个或多个远程接收机通信的通信系统中接收机的功率消耗。各接收机间歇地进入“活动状态”,在此期间它可以接收信道上的报文。在接收机各次相继出现活动状态期间发送机将一个或多个报文送到各接收机。尽管这里我们通常指单个接收机,但应该理解系统中不止一个的这类接收机可以同时活动。在接收机“不活动状态”,即相继的活动状态之间的时间,发送机不发送任何报文至该接收机,但它可以发送报文至系统中处于活动状态的其它接收机。在不活动状态,接收机可以执行无需与发送机协同的任何动作。接收机可以从一个或多个部分例如用于监视信道的这些部分移走电力以利用不活动状态减少其功率消耗。
信道在时间量上分成连续的“时间片”流。接收机有一“时间片周期”,它包括两个或更多的“时间片”。接收机分配得到其时间片周期的一个时间片,在此期间它必须监视信道。接收机通常仅在其分配到的时间片期间处于活动状态而在时间片周期的其余部分则处于不活动状态。但是,若报文本身致使接收机执行一些另外的动作,则它必须仍处于活动状态,直到它完成该项动作。
应在时间量上调整发送机和接收机时间片的定时以确保发送出的报文不被丢失而在分配到的时间片中接收。在某些实施例中,可以使发送机和接收机的时间片定时连续地同步。但在其它实施例中,接收机可以在不活动状态期间独立运行,因而相对于发送机会发生定时漂移。在这类实施例中,接收机可以使其时间片定时与发送机的时间片定时间歇地同步。
在数字式蜂窝电话系统中,例如接收机可以捕获和跟踪发送机在一独立的导频信道上提供的导频信号。在不活动状态,接收机可以将电力从不活动状态期间的导频信号跟踪电路移去以保存电力。在不活动状态,接收机可利用内部时钟源维持其时间片的定时。在其分配到的时间片后一次出现之前较短时间,接收机可以将电力加到这个电路上重新捕获导频信号。接收机则可以使之与导频信号同步来调整其定时与发送机的一致。除了加电和重新捕获导频信号之外,接收机还可以执行任何其它动作或初始化使之在其分配到的时间片的开始时准备好接收报文。
各报文还可以包含一指示是否正有另一个报文要来的字段。若还有一报文要来,则接收机仍处于活动状态进入到下一时间片。若没有另外的报文,则接收机对于时间片周期的余下部分可以立刻进入不活动状态。
在具有多个接收机的系统中,各个接收机伪随机地分配得到其时间片周期的时间片。与接收机一一对应的识别号可以送给一混列函数,它伪随机地产生被分配的时间片号。
系统中的所有接收机无需有相同的时间片周期。而且在运行中接收机的时间片周期可以改变。例如,接收机可以选择一新的时间片周期并发送报文至发送机通知它新的时间片周期。不论接收机还是发送机都可以改变接收机的时间片周期,但两者都必须知道该时间片周期。
上面的说明,以及本发明的其它特征和优点通过参考下面的说明、权利要求书和附图将会更清楚。
为了对本发明有更全面的理解,我们现在对以下附图中所图释的实施例作出后面详述的说明。
图1图示具有一个发送机和两个接收机的本发明一实施例中报文的分时间片的发送。
图2a-2d图示在相继的时刻发送机时间片信号和接收机时间片信号之间的定时关系。
图3图示具有报文信道和导频信道的本发明一实施例。
图4图示接收机在分配到的时间片从不活动状态至活动状态的过渡形式。
图5a-5b图示具有顺序号字段的报文。
图1中,发送机10可以将报文送给两个接收机12和14。其它实施例可以有或多或少数目的接收机。在如上面引用的美国专利和一同待审的申请中所讨论的数字式蜂窝电话系统中,发送机10设置在基地站或单元格点(未图示)上,并将报文发送至设置在移动站(未图示)中的接收机12和14,移动站可以是蜂窝电话或个人通信系统(PCS)的手持送受话器。
基地站在“寻呼”信道上发送的这些报文可以提供给移动站来向电话呼叫的指示和进行专用控制动作的要求,或者还有更新的系统参数。寻呼信道的传输由图1中虚线表示。
接收机12和14分别具有32位的电子连续号(ESN)16和18。各个接收机的ESN都与所有的其它接收机不同。在蜂窝式电话系统中,至蜂窝式电话的呼叫选路至移动电话交换局(MTSO,未图示)。移动电话交换局转而将该呼叫选路至位于移动站发送范围内的基地站。MTSO或基地站包括将蜂窝式电话的电话号转换成移动站ESN的装置。
在移动站初始化或如蜂窝式通信技术中公知的“登记”期间,或是在需要的其它时刻,接收机12和14各自分别选择时间片周期指数20和22。时间片周期指数20和22分别规定接收机12和14的时间片周期24和26长度。移动站的处理器可以利用一种算法来选取时间片周期指数,或可以用一预先规定的值。例如,在图1中时间片周期指数20和22两者都有值“1”。1-7的范围对时间片周期指数20和22是较佳的。这样最大时间片周期指数MAX_SSI是“7”。可以选取值“0”以表明接收机将连续地监视信道,即回避了本发明的分时间片的通信方法。在蜂窝式电话系统中,各个移动站由其接收机将选取的时间片周期指数发送至基地站,基地站需要这种信息以接通接收机。
接收机12和14计算时间片周期24和26,其长度分别为5×2(时间片周期指数20)和5×2(时间片周期指数22)个时间片。发送机10产生定时信号28,它包括周期性时间片30的流。类似地,接收机12产生定时信号32,它包括周期性时间片34的流,接收机14产生定时信号36,它包括周期性时间片38的流。时间片30、34和38长度相等,长度最好为200毫秒(ms)。这样按上述函数采用1-7的时间片周期指数范围就产生长度在10和640个时间片之间的时间片周期范围,采用200ms的时间片则此范围对应于2和128秒之间的时间范围。
接收机12在分配到的时间片40期间监视信道,被分配的时间40在每个时间片周期24中出现一次。接收机14在分配到的时间片42期间监视信道,被分配的时间片42在每个时间片周期26中出现一次。伪随机地选取被分配的时间片40和42以便他们均匀地分布在具有给定长度的时间片周期的时间片中。尽管选取被分配的时间片40和42的许多伪随机方法都合适,但最好是采用下面等式1和等式2的方法。
等式1和2可以由发送机10和接收机12和14相对于“系统时间”确定周期性时间,在周期性时间出现被分配的时间片40和42。系统时间开始时,各个可能的时间片周期的第一个时间片(slot0)同时出现。系统时间可以是各个发送机10和接收机12和14的一个计数器(未图示)的当前值。这一类计数器(未图示)若有足够大数目的位则可以不重复地运行数千年,它可由本领域的技术人员方便地构成。另外,发送器10可以使其计数器(未图示)与全世界广播时钟源(例如由全球定位系统(GPS)所产生的)同步。接收器12和14如下面说明的那样使它们的计数器(未图示)与发送机10的同步。
PGSLOT=2MAX_SSI×((40503×(L
Figure 931028035_IMG4
H
Figure 931028035_IMG5
D))模216)/216(1)这里,MAX_SSI是最大时间片周期指数;
L是ESN的16位最低有效位;
H是ESN的16位最高有效位;
D是数字6和以ESN的12位最低有效位;
N是系统时间;
X表示小于等于X的最大整数;
Figure 931028035_IMG6
表示位方式异或运算;
所有运算均为整数算法。
等式1可求得PGSLOT,它表示从最大长度的时间片周期的起始算起出现被分配的时间片的时间。下面的等式2使这一时间与系统时间相关。接收机12采用ESN16来计算其PGSLOT具有最大值5×2SSI_MAX个时间片(2SSI_MAX秒)。但接收机12和14可选择较短的时间片周期,如图1所示的时间片周期24和26其长度均为10个时间片(2秒)。
被分配的时间片40和42分别在时间片周期24和26内定期地出现。下面的等式2可用于确定相对于系统时间何时出现被分配的时间片40和42。
(N-PGSLOT)模(5×2SSI)=0 (2)
在等式2中,N是当前的时间片。如上所述,在系统时间的起始所有可能的时间片周期的第一时间片出现,即这时N等于0。接收机12和14将各自的时间片周期指数20和22分别代入等式2中的SSI。PGSLOT值对于各个接收机12和14还是唯一的,因为它分别从ESN16和18求得。接收机12和14各自可以在各次时间片周期计算等式2,若分别为真,则当前时间片是其被分配的时间片40或42。因而分别对来向报文监视信道。当然,接收机12和14无需在每次时间片周期计算等式2。接收机12和14可以在某些初始时刻计算等式2,一旦等式2为真,可在此之后周期地在时间片周期24和时间片周期26的间歇监视信道。
与移动站接收机12和14相对应上述计算也由基地站发送机10执行。例如,当主叫用户拨出与移动站有关的电话号,MTSO则将此呼叫选路至该移动站附近的基地站。基地站通过向查询表提供电话号检索移动站的ESN和时间片周期。基地站用等式1和2计算它必须在此期间向移动站发送的被分配时间片。当基地站时间片定时信号产生被分配时间片,发送机就向移动站发送表明来向呼叫到来的报文。
当移动站接收机12譬如选取时间片周期指数20,它在另一信道上(未图示)将所选取的值发送至基地站。该基地站向移动站接收机12发送一确认报文以对该选择进行确认。发送机10在发送确认之后就开始采用新选择的时间片周期指数。但是,若由于传输的差错接收机12未接收到这一确认,接收机12就继续采用原来的时间片周期指数。若发送机10未采用与接收机12计算其被分配时间片所用的相同的时间片周期指数来计算接收机的被分配时间片就会丢失报文。为避免这类差错,若接收机12未收到确认它就选取缺省的时间片周期指数“1”。时间片周期指数“1”确保由发送机10计算出的被分配时间片与接收机12计算出的被分配时间片相一致。事实上要使时间片对齐,接收机只需采用小于或等于发送机的时间片周期指数。
基地站发送机10的时间片定时信号28在向移动站接收机12发送报文期间与时间片完时信号32同步而在向移动站接收机14发送报文期间与时间片定时信号36同步。发送机10使时间片定时信号28与其系统时间计数器(未图示)同步。
图2a-2d示出一基地站发送机与一移动站接收机之间定时信号的关系。图2a-2d表示相继的瞬间,示出在这些相继的时刻发送机和接收机信号的部分。注意箭头72简化标注作为共同参考时刻的固定时刻以便比较整个图2a-2d的信号。信号可当作在时间在从左向右往箭头72那儿移动,就象在传送带上通过。
在图2a中,基地站发送机例如是图1中的基地站发送机10,在一独立的导频信道上发送与系统时钟同步的导频信号50。基地站发送机10使具有时间片54、56和58的发送机时间片信号52与导频信号50同步。尽管导频信号50被示作具有与时间片54、56和58的相同期间,但它可以是由此可获得这类周期性信号的任何类型的信号。时间片54具有报文60、62、64和66。尽管在各个被分配的时间片内必须发送至少一个报文,但在一个时间片中可以发送的报文的最大数目仅受到传输速率和时间片长度的限制。
图2a示出接收机处于不活动状态期间某一时刻的信号。接收机时间片信号68以虚线图示表示不活动状态,因为在不活动状态接收机可以将电力从监视报文信道的电路(未图示)去掉来保存电力。它还可以从跟踪导频信号50的电路(未图示)去掉电力。值得强调的是接收机可以在不活动状态执行不需与发送机相协调的任何动作。
如图2a所示,因为在不活动状态接收机不对导频信号50进行跟踪而是可以以其它方式使时间片信号68与之同步因而接收机时间片信号68不会与发送机时间片信号52精确地对齐。但这些信号可漂移的最大时间得显著地小于一个时间片。
时间片70是接收机分配到的时间片,可以与图1中被分配的时间片40和42相对应。发送机将在第一报文(报文66)到达箭头72的时刻发送报文。发送机定时信号可以自系统时间开始以后对时间片周期的时间片计数来确定这个时刻。例如,时间片零在系统时间开始时第一次出现,并以时间片周期为周期周期性地重复。虽然在以前的不活动状态期间接收机定时信号也许已经从发送机定时信号略微漂走,但在下一个时间片到来之前它们早就被同步了。对于采用2秒的时间片周期的接收机来说漂移典型地仅仅约2微秒。因而接收机能以正好在一单个时间片以内的精度确定可以期望接收报文的时刻,即箭头72的时刻。它因而可以稍稍在这出现之前开始过渡到活动状态。
图2b示出在图2a之后的某一时刻相同的信号。在图2a和图2b之间的某一时刻,接收机开始过渡到活动状态并将电力加到跟踪导频信号50的电路上。希望过滤是在时间片74(即被分配的时间片70前面的时间片)的起始到达箭头72之后开始的。但过渡可以在某一更早的时刻开始。在过渡状态,接收机可以将电力加到电路,执行硬件复位,执行初始化例行程序,重新捕获导频信号50、同步信号,或执行任何必需的动作使之准备在到达箭头72的被分配时间片70内接收报文。
图4中示出的过滤状态80是在时间片slot4(即在被分配时间片slot5之前的时间片)内开始的。接收机在这一时间之前处于不活动状态81。在时间片slot5期间,接收机处于活动状态82,而在时间片slot5结束时返回到不活动状态。在没有下面所讨论的前提的情况下,接收机仅仅在其分配到的时间片期间处于活动状态。
回到图2c,它示出在图2b之后的某一时刻的信号,接收机时间片信号68与发送机时间片52完全同步。接收机已重新捕获到并且正在跟踪导频信号50。因为在到达箭头72的被分配时间片内接收机准备好接收报文因而该接收机处于活动状态。
在图2d所示的时刻,接收机正在接收报文60。它已经接收到报文62、64和66。各个报文可以有几个字段,例如报文62的字段90、92、94和96。字段包含接收机地址和给接收机的指令。字段可以包含由接收机用的系统参数。另一种方案,在发送机寻呼接收机时报文字段可包含电话号。接收机对各报文译码,可以根据字段中所含的数值执行一个或多个动作。
图3示出产生图2a-2d所示信号的系统的方框图。该系统包括基地站发送机120和移动站接收机122。用户(未图示)例如可以起动对具有接收机122的移动站的呼叫。在蜂窝式电话系统中在MTSO(未图示)收到这一呼叫,这一呼叫包括所呼叫的移动站的电话号。MTSO将此呼叫选路至一基地站。MTSO相应于该移动站的电话号得到移动站的ESN和时间片周期。MTSO然后向基地站提供输入信息124,它包括移动站的ESN和时间片周期。信息124由发送机处理器126接收,它可以是微处理机或其他控制电路。处理器126可以利用上面等式1-2的混列函数求得移动站被分配的时间片。
发送机时间片信号发生器130产生一被分配的时间片信号129,在处理器126必须提供报文128时,即被分配时间片前面较短的时间,该被分配的时间片信号129可以中断处理器126。发送机时间片信号发生器130可以有保存时间片计数的计数器。另一种方案,计数可以由处理器126保存。发送机时间片信号发生器130使报文128与发送机时钟源140产生的系统时钟138同步。导频信号发生器136产生与系统时钟138也同步的导频信号134。加法器142使导频信号134与同步的报文信号132相加并将和信号144送至寻呼信道发送机141。寻呼信道发送机141广播发送的报文143。
在移动站接收机122中,寻呼信道接收机146接收发送的报文143。在不活动方式下,电力控制器147可以将电力从一个或多个部分例如接收机146去掉。接收到的报文信号150送给接收机时间片信号发生器150。在不活动方式下,接收机时间片信号发生器152维持时间片计数与接收机时钟源158产生的当地时钟信号156同步。在不活动方式下,接收机时间片信号发生器152从接收到的报文信号150提取报文和导频信号,并提供与导频信号同步的同步报文160。同步报文160送给处理器162。处理器162相应于报文提供输出信号164。信号164通知移动站它必须执行的动作种类。例如移动站可以根据告知它来向呼叫到来的信号164开通一“往来”信道以便进行连续的话音通信。
各报文可以有MORE_PAGES字段,它向接收机表明在当前报文之后是否将发送另外的报文。字段中的零表明没有另外的报文。若接收机在MORE_PAGES字段中译码为0,它就可以立即进入不活动状态,无需等到当前字节的结束。若报文在MORE_PAGES字段中有非零值,接收机则仍处于活动状态。若被分配的时间片结束时所接收到的报文在MORE_PAGES字段中有非零值,接收机可以继续处于活动状态进入紧接在被分配时间片后的时间片。希望接收机仅仅在2个时间片处于活动状态以便接收机不会因活动状态而浪费电力。这是为了避免含有为“0”的MORE_PAGES字段的报文误收后被废弃。
图2d中,报文66在MORE_PAGES字段98中有非零值“1”因而,接收机仍处于活动状态以接收报文64,报文64在MORE_PAGES字段100中有非零值“1”。接收机仍处于活动状态以接收报文62,报文62在MORE_PAGES字段96中有非零值。类似地接收机仍活动以接收结束时出现的报文60。在时间片99到达箭头72之后因为报文60的MORE_PAGES字段101有非零值“1”因而接收机仍处于活动状态。接收器在时间片99开始时接收报文102。因为报文102的MORE_PAGES字段104有“0”值,接收机可以在接收报文102之后进入不活动状态。
报文可以包括一个具有接收机ESN的地址字段和一个或多个指令接收机执行其它动作的动作字段。接收机执行含有接收机ESN的报文中所出现的任何动作。另一种方案,寻址功能可以由发送机执行发送电话号。在这种情况下,接收机执行含有分配给接收机的电话号的报文中所出现的任何动作。这些动作可以使接收机仍处于活动状态以接收另外的报文。因为接收机现在接收所有的时间片,这些报文可在任何时刻发送。动作可以使接收机在一段时间内变成活动状态,而后进入运行的分时间片方式。图5a中,接收机(未图示)在时间片周期“n”的被分配时间片112期间接收报文110。报文110有一含地址122的地址字段120。报文110还有一含指令126的动作字段124。若地址122与接收机ESN对应,则该接收机执行指令126。
指令126可使移动站更新系统参数或“开销”信息。使移动站更新开销信息的报文还可以有一个或多个含有“顺序号”的字段。接收机读出各个这类字段中所含的顺序号并存储该值。当在下一时间片周期期间收到含有这一顺序号的下一报文时,接收机读出各顺序号字段中的顺序号并将它们与以前(通常是在以前的时间片周期期间)存储的相应的顺序号比较。若某些顺序号已改变,接收机则向与其相关的移动站中的处理器提供指示以更新该开销信息。
图5a中,报文具有含顺序号128的顺序号字段114。接收机将顺序号128存储在与顺序号字段114相应的位置中。图5b表示下一时间片周期即时间片周期“n+1”。接收机在被分配时间片112期间接收报文116,它在顺序号字段118中含有顺序号130。顺序号字段118与以前时间片周期期间所接收的报文110的顺序号字段114相对应。接收机比较顺序号128和130,若不同,则向处理器(未图示)表明移动站将处于活动状态。接收机则可以等待具有新开销信息的附加报文,或执行按处理器所指令的任何其他动作。若在后续时间片周期中所收到报文的相应的顺序号字段中的值保持不变,接收机则无需执行任何另外的动作。
很显然,按照这些教导,本发明的其他实施例和变化对于本领域的普通技术人员来说将是容易的。因此,结合上述说明和附图来看,本发明将仅仅由涵盖所有这类其他实施例和变换形式的权利要求书限定。

Claims (21)

1、一种周期性间歇通信的装置其特征在于包括:
一基地站,包括:
一提供报文信息的报文发生器;
一发送机报文定时信号发生器,它产生周期性时间片流,其中至少一个所述时间片为被分配时间片;
一仅在各个所述被分配时间片期间在报文信道上发送所述报文信息的报文发送机;
至少一远程站,分别设置在远离所述基地站的位置并与一个所述被分配时间片对应,各所述远程站包括:
一提供与所述远程站对应的所述被分配时间片指示的接收机报文定时信号发生器;
一仅在与所述远程站对应的所述被分配时间片期间监视所述报文信道的报文接收机;
一从所述被分配时间片恢复所述报文信息的报文提取器。
2、如权利要求1所述的周期性间歇通信的装置,其特征在于还包括:
一设置在各个远程站仅在与所述远程站对应的所述被分配时间片期间向所述远程站的一个或多个组成部分供应电力的电力控制器。
3、如权利要求2所述的周期性间歇通信的装置,其特征在于所述电力控制器在与所述远程站对应的所述被分配时间片之前较短的过渡时间向所述组成部分供应电力。
4、如权利要求3所述的周期性间歇通信的装置,其特征在于,
所述基地站进一步包括提供与所述报文信息同步的周期性导频信号并在导频信道上发送所述导频信号的导频发生器;
各个所述远程站进一步包括捕获所述导频信号并在所述过渡时期使所述接收器报文定时信号发生器与所述捕获到的导频信号同步的导频信道接收器。
5、如权利要求4所述的周期性间歇通信的装置,其特征在于所述过渡时期是与所述远程站对应的所述被分配时间片之前一个所述时间片的部分。
6、如权利要求5所述的周期性间歇通信的装置,其特征在于所述基地站是单元格点而各个所述远程站是蜂窝式电话。
7、一种提供系统周期性协调通信的办法,该系统具有发送机和在所述发送机的远程位置的至少一个接收机,各个所述接收机机具有活动方式、不活动方式、和唯一的识别号,所述发送机和各个所述接收机与周期性时间片同步,其特征在于包括以下步骤:
选择与各个所述接收机对应的时间片周期,所述时间片周期是预先规定数目的所述时间片;
选择各个所述接收机的所述时间片周期的一个被分配时间片;
在所述接收机的所述被分配时间片期间每一时间片周期在信道上发送至少一个报文,同时在所述被分配时间片期间在所述远程位置监视所述信道。
8、如权利要求7所述的方法,其特征在于还包括以下步骤:
所述报文具有第一字段以提供还另有报文的指示;
读出所述第一字段的所述状态;
当所述第一字段表明还有另外的报文时,则在所述信道上的所述接收机发送至少一个另外的报文,同时在所述远程位置监视所述信道,当所述第一字段表明没有另外的报文时,则使所述接收机处于所述不活动方式。
9、如权利要求8所述的方法,其特征在于所述不活动方式是低功率方式。
10、如权利要求7所述的方法,其特征在于还包括:在所述接收机的所述被分配时间片期间每一时间片周期在信道上向各个所述接收机发送至少一个报文,同时在所述被分配时间片期间在所述远程位置监视所述信道,在该步骤之前还包括以下步骤:
在所述远程位置捕获导频信号,所述导频信号由所述发送机提供,并与所述发送机的所述周期性时间片相同步;
使所述接收机的所述周期性时间片与所述捕获到的导频信号同步。
11、如权利要求10所述的方法,其特征在于所述不活动方式是低功耗方式。
12、如权利要求7所述的方法,其特征在于还包括以下步骤:
所述报文具有:包含与一个所述识别号对应的地址的第二字段和包含指导所述接收机执行动作的指令的第三字段;
在所述远程位置从所述第二字段读出所述地址;
在所述远程位置从所述第三字段读出所述指令;
若所述地址与在所述远程位置的所述接收机对应则在所述远程位置执行所述动作,所述接收机仍处于所述活动方式;
使所述接收机处于所述不活动方式。
13、如权利要求12所述的方式,其特征在于所述动作包括更新开销信息。
14、如权利要求7所述的方法,其特征在于还包括以下步骤:
所述报文具有含顺序号的第四字段;
在所述远程位置从所述第四字段读出所述顺序号;
使所述顺序号和以前存储的顺序号相比较;
当所述顺序号不等于所述以前存储的顺序号时在所述远程位置执行动作,所述接收机仍处于所述活动方式;
在所述远程位置存储所述顺序号;
使所述接收机处于不活动方式。
15、如权利要求14所述的方法,其特征在于所述动作包括更新开销信息。
16、如权利要求7所述的方法,其特征在于对应于所述识别号选择所述被分配时间片。
17、如权利要求16所述的方法,其特征在于,
所述时间片周期在预先规定时间开始;
对应于所述预先规定时间选择所述被分配时间片。
18、如权利要求17所述的方法,其特征在于所述时间片周期的选择步骤是在所述远程站执行的。
19、如权利要求18所述的方法,其特征在于所述选择时间片周期的步骤包括以下步骤:
在1和7之间的范围内选择时间片周期指数(SSI);
计算时间片周期具有5×2SSI个时间片。
20、如权利要求19所述的方法,其特征在于各个所述时间片是200毫秒。
21、如权利要求19所述的方法,其特征在于,
N为自所述预先规定时间起所经历的时间片数目;
所述识别号具有32位,L为所述识别号16位最低位有效位,H为所述识别号16位最高有效位,D为6乘以所述识别号12位最低有效位的数;
PGSLOT为小于或等于27×((40503×(L
Figure 931028035_IMG2
H
Figure 931028035_IMG3
D))模216)/216的最大整数;
所述被分配时间片当(N-PGSLOT)模(5×2SSI)=0时出现。
CN93102803A 1992-03-05 1993-03-05 降低移动通信接收机功率消耗的装置和方法 Expired - Lifetime CN1052593C (zh)

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