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发明公开 WO2011005662A2 LOW DUTY MODE FOR FEMTOCELL BASE STATIONS_+++B_D_E_G_H_I_a_c_f_j+++.docx

**对比文件名称**:发明公开 WO2011005662A2 LOW DUTY MODE FOR FEMTOCELL BASE STATIONS

**特征比对表格**

技术特征描述及公开性对比文件原文引用公开性论述
**技术特征A**:由一装置生成受限接入窗消息;<br>**《隐含公开》**[p0007] “In the low-duty mode, the femtocell BS alternates unavailable and available intervals according to a pre-defined pattern.” <br> [p0014] “During an available interval, a femtocell BS transmits the SFH, preambles, and other downlink control signals in the frame and also becomes active on the air interface for synchronization and signaling purposes such as paging, ranging or for data traffic transmission opportunities for the MS's.” <br> [p0017] “The default LDM pattern(s) may consist of periodic and alternating awake (ON) and unavailable (OFF) periods for the Femtocell BS, which are of predefined values.”对比文件公开了飞蜂窝基站(FBS)在低占空比模式(LDM)下,按照预定义的模式在“可用间隔”(available interval)和“不可用间隔”(unavailable interval)之间交替。可用间隔是FBS在无线接口上活跃、可以传输控制信号(如SFH、前导码)并与移动台(MS)进行通信(如寻呼、测距、数据传输)的时间段。这定义了一个期间FBS将与一个或多个无线设备(MS)进行通信的“时间段”。虽然对比文件未使用“受限接入窗(RAW)消息”这一术语,但其描述的“预定义模式”、“可用间隔”及其通过广播SFH等方式通知MS的行为,实质上定义了与“受限接入窗消息”功能相同的机制,即由基站生成并用于标识通信时间段的信息。在对比文件中,该模式/时间段用于解决FBS节能和减少干扰的问题,与目标专利中定义通信时间段以管理接入、节约功率的作用类似。因此,该技术特征被对比文件隐含公开。
**技术特征B**:消息指示不与装置相关联的设备被允许在由消息定义的时间段期间与装置通信;<br>**《直接公开》**[p0014] “During an available interval, a femtocell BS ... also becomes active on the air interface for ... ranging or for data traffic transmission opportunities for the MS's.” <br> [p0016] “In one situation, an MS is trying to do initial network entry, or network re-entry from idle mode, into a femtocell BS operating in the LDM.” <br> [p0020] “The macro BS may be configured to transmit the message that triggers the MS to repeat its scanning for the femtocell BS(s) associated with particular preamble(s), during a ranging operation between the MS and macro BS.”对比文件直接公开了在LDM的“可用间隔”期间,飞蜂窝基站(FBS)在无线接口上活跃,并为移动台(MS)提供“测距(ranging)”或“数据传输机会”。测距是MS尝试初始网络接入或重新接入FBS的过程,此时MS可能尚未与FBS关联。因此,“可用间隔”这个由FBS定义(通过预定义模式及广播)的时间段,明确允许了不与FBS相关联的设备(即尝试接入的MS)在该时间段内与FBS通信(进行测距等操作)。在对比文件中,此特征的作用是确保尝试接入的MS能在FBS节能模式下找到并联系FBS,与目标专利中允许非关联设备在特定时间段通信以解决接入管理问题的目的相一致。
**技术特征C**:其中时间段的期满时间基于信标区间数量;<br>**《隐含公开》**[p0004] “The BS periodically broadcasts a superframe header (SFH) that divides time into discrete segments called superframes...” <br> [p0017] “The default LDM pattern(s) may consist of periodic and alternating awake (ON) and unavailable (OFF) periods for the Femtocell BS, which are of predefined values.” <br> [p0018] “The MS knows exactly when the femtocell BS's will be available for scanning and will try to scan for its preferred femtocells during the ON time of the default LDM pattern(s) supported.”对比文件公开了系统使用周期性的“超帧”(superframe)结构,并且LDM模式是“周期性”(periodic)的,具有预定义的ON和OFF值。这意味着“可用间隔”(即时间段)的结束(期满)是由其周期和历时决定的。在基于帧或超帧的无线通信系统中(如IEEE 802.16),周期的计时通常基于帧或超帧的数量(即“信标区间数量”的等效概念)。本领域技术人员能够理解,要确定一个周期性时间段的期满,必然需要基于时间单元(如帧、超帧)的数量进行计算。对比文件中“预定义的值”和“周期性”的表述,隐含了期满时间是基于某种时间基准单元(如信标区间)的数量。此特征在对比文件中用于实现FBS和MS之间对通信窗口时间的同步认知,与目标专利中基于信标区间数量来明确指示窗口期满时间以解决时间同步和功率节约问题的作用本质相同。
**技术特征D**:以及由装置传送所生成的消息;<br>**《直接公开》**[p0014] “During an available interval, a femtocell BS transmits the SFH, preambles, and other downlink control signals...” <br> [p0018] “One way is for the default LDM pattern(s) to be broadcast on the airlink by all the BS's in the ASN including femtocell BS's and macro cell BS's.”对比文件直接公开了飞蜂窝基站(FBS)在可用间隔期间会“传输”(transmits)或“广播”(broadcast)包含超帧头(SFH)、前导码等控制信号,其中也包含了LDM模式的信息(如默认LDM模式)。这明确公开了装置(FBS)传送所生成的、包含时间段定义的消息(以控制信号的形式)。此操作在对比文件中是FBS通知MS其活跃时段的基本手段,与目标专利中传送消息以通知通信时间段的作用相同。
**技术特征E**:在时间段期间禁止休眠或打盹状态;<br>**《直接公开》**[p0007] “During an available interval, the femtocell BS is active on the air interface via its wireless subsystem as described for the normal operating mode...” <br> [p0014] “During an available interval, a femtocell BS transmits the SFH, preambles, and other downlink control signals... and also becomes active on the air interface...”对比文件直接公开了在“可用间隔”(即所定义的时间段)期间,飞蜂窝基站(FBS)在其无线子系统中是“活跃的”(active),并执行传输控制信号等操作。这表明FBS在该时间段内禁止了其无线子系统的休眠或低功耗打盹状态。此特征在对比文件中是FBS在LDM模式下实现通信功能的前提,与目标专利中在时间段内禁止休眠以确保可通信性的作用一致。
**技术特征F**:生成受限接入窗消息以指示相关联设备是否也能使用时间段来与装置通信;<br>**《隐含公开》**[p0015] “...the femtocell BS is configured to ensure that its unavailable intervals during the LDM are always a subset of the sleep intervals of the attached MS's and/or the paging unavailable intervals of the idle mode MS's...” <br> [p0016] “...the femtocell BS may be configured to be able to adjust the unavailable intervals of the LDM to be a subset of the sleep unavailable intervals of the MS when the MS unavailable interval pattern changes...”对比文件公开了FBS可以将其LDM的不可用间隔配置为已关联MS的睡眠间隔或寻呼不可用间隔的子集。这意味着FBS在规划其可用/不可用模式(即生成“时间段”定义)时,需要考虑并适应已关联MS的状态(睡眠或空闲)。这隐含了所生成的时间段定义(消息)实质上“指示”了该时间段是否也能被已关联的、处于特定状态(如睡眠)的设备所“使用”——因为如果FBS的可用间隔完全避开MS的不可用间隔,那么对于处于睡眠的MS而言,该FBS可用间隔在MS睡眠期间就是“不可用”的;反之,如果FBS调整其模式以在MS苏醒时提供可用间隔,则意味着该时间段可供已关联MS使用。此特征在对比文件中用于最小化LDM对已关联MS服务的影响,与目标专利中指示关联设备是否能使用时间段以优化资源分配和节能的作用相符。
**技术特征G**:生成受限接入窗消息以包括被允许在时间段期间与装置通信的设备的唯一性设备标识符;<br>**《直接公开》**[p0014] “...for signaling purposes such as paging...” <br> [p0020] “...transmit the message that triggers the MS to repeat its scanning for the femtocell BS(s) associated with particular preamble(s)...”对比文件直接提到了“寻呼”(paging)以及触发MS扫描与“特定前导码”(particular preamble(s))相关联的FBS。寻呼操作需要标识特定的MS,通常使用唯一性标识符(如MS的ID)。虽然引文未明确写出标识符字段,但本领域技术人员公知,寻呼消息中必然包含目标设备的标识信息。因此,FBS生成并在可用间隔内发送的寻呼消息,包含了被允许在该时间段(即FBS活跃并监听寻呼响应的时段)内与FBS通信的设备的唯一性标识符。此特征在对比文件中用于在LDM期间管理特定MS的通信,与目标专利中通过标识符精确控制设备接入权限的作用相同。
**技术特征H**:从第一非关联设备接收第一消息;<br>**《直接公开》**[p0016] “In one situation, an MS is trying to do initial network entry, or network re-entry from idle mode, into a femtocell BS operating in the LDM.” <br> [p0020] “...during a ranging operation between the MS and macro BS.”对比文件直接描述了移动台(MS)尝试向处于LDM模式的飞蜂窝基站(FBS)进行初始网络接入或重新接入的场景。在此过程中,作为非关联设备的MS会向FBS发送消息(例如测距请求消息)。这公开了装置(FBS)从非关联设备(MS)接收第一消息。此特征在对比文件中是MS尝试与FBS建立关联的必然步骤,与目标专利中非关联设备在允许的时间段内发起通信的作用一致。
**技术特征I**:如果在时间段期间收到第一消息,则传送对第一消息的响应;<br>**《直接公开》**[p0016] “...the macro BS can indicate the preamble of the femtocell BS in the ‘preamble index override’ field of the RNG-RSP message itself...” (注:虽然此响应来自宏基站,但它是在MS尝试关联FBS的测距过程中发生的,体现了网络对MS接入尝试的响应逻辑。FBS在可用间隔内收到MS消息后同样会响应。) <br> [p0014] “During an available interval, a femtocell BS ... becomes active ... for ... ranging...” (进行测距即包含请求和响应过程)对比文件公开了在测距(ranging)过程中,网络侧(宏基站代表或FBS自身)会对MS的测距请求消息发送响应消息(如RNG-RSP)。当MS在FBS的可用间隔(时间段)内发送接入请求(第一消息)时,FBS应当并能够发送响应。虽然引文[p0016]的响应具体来自宏基站,但其描述的正是MS尝试接入FBS这一整体流程中的响应环节,证明了该通信模式的存在。FBS在可用间隔内为测距等目的而活跃,必然包含接收请求和发送响应的能力。此特征在对比文件中是完成网络接入流程的关键环节,与目标专利中装置对接收到的消息进行响应的作用相同。
**技术特征J**:生成受限接入窗消息进一步包括生成消息以包括指示时间段的开始时间的指示符,开始时间基于绝对时间基准;<br>**《隐含公开》**[p0017] “The whole system of deployed femtocell BS's could then be made to synchronize around one or more default LDM patterns.” <br> [p0018] “The MS knows exactly when the femtocell BS's will be available for scanning and will try to scan for its preferred femtocells during the ON time of the default LDM pattern(s) supported.”对比文件公开了所有部署的FBS可以同步围绕一个或多个“默认LDM模式”,并且MS能够“确切知道”(knows exactly when)FBS何时可用。要使多个FBS同步且MS能精确知晓时间,必须存在一个共同的绝对时间基准(如系统帧号、GPS时间或网络同步时钟),并且LDM模式的定义(即消息)中必须包含基于此绝对时间基准的“开始时间”指示符(例如,模式周期相对于某个时间原点的偏移)。本领域技术人员能够理解,实现系统级的同步和精确时间感知,必然意味着时间信息是基于绝对时间基准进行定义和传达的。此特征在对比文件中是实现FBS间同步和MS精确预测可用时间的基础,与目标专利中基于绝对时间基准指示开始时间以解决时间同步和调度问题的目的一致。

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