CN105637968A - 用于在次级信道上根据受调度的ofdma技术进行通信的hew主站和方法 - Google Patents
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Abstract
在此总体上描述一种用于在次级信道上根据受调度的OFDMA技术进行通信的高效率WLAN(HEW)主站以及方法的实施例。接入点被配置为:操作为包括多个高效率WLAN(HEW)站和多个遗留站的基本服务集(BSS)的一部分。BSS在主级信道以及一个或多个次级信道上操作。根据一些实施例,所述接入点可以在所述主级信道被用于与所述遗留设备中的一个或多个的通信时,根据受调度的OFDMA通信技术在所述次级信道中的一个或多个上与所述HEW站中的一个或多个进行通信。
Description
优先权要求
该申请要求2014年7月25日提交的美国专利申请序列号No.14/341,055的优先权的利益,后者要求以下美国临时专利申请的优先权的利益:
2013年11月19日提交的序列号No.61/906,059,
2014年4月1日提交的序列号No.61/973,376,
2014年4月8日提交的序列号No.61/976,951,
2014年4月30日提交的序列号No.61/986,256,
2014年4月30日提交的序列号No.61/986,250,
2014年5月12日提交的序列号No.61/991,730,
2014年6月18日提交的序列号No.62/013,869,以及
2014年7月15日提交的序列号No.62/024,801,
其全都通过引用整体合并于此。
技术领域
实施例涉及无线网络。一些实施例涉及包括根据IEEE802.11标准之一(例如,IEEE802.11ac标准或IEEE802.11axSIG(名为DensiFi))操作的网络的无线局域网(WLAN)和Wi-Fi网络。一些实施例涉及高效率无线或高效率WLAN(HEW)通信。一些实施例涉及多用户多入多出(MU-MIMO)和正交频分多址(OFDMA)通信。
背景技术
被称为高效率WLAN(HEW)的IEEE802.11ax是IEEE802.11ac标准的继任者,其意图增加无线局域网(WLAN)的效率。HEW的目标是提供与IEEE802.11ac标准相比高达四倍或更高的吞吐量。HEW在竞争无线介质的许多设备可能具有低数据率至中等数据率要求的高密度热点和蜂窝卸载情形中可能是特别适合的。Wi-Fi标准从IEEE802.11b演进到IEEE802.11g/a,再到IEEE802.11n,再到IEEE802.11ac,现在到IEEE802.11ax。在这些标准的每次演进中,存在用于承担与先前标准共存的机制。对于HEW,为了与这些遗留标准共存,存在同样的要求。关于HEW的一个问题是带宽的高效分配和使用。在某些情形中,带宽对于遗留设备的仅在一部分可用带宽上的操作而言,可能变为闲置(unused)的。
因此,通常需要允许HEW设备与遗留设备共存的系统和方法。通常还需要允许HEW设备与遗留设备共存并且更高效地分配和使用可用带宽的系统和方法。
附图说明
图1示出根据一些实施例的无线网络;
图2示出根据一些实施例的HEW通信可以发生的时间-频率空间;
图3示出遗留通信可以发生的时间-频率空间;
图4示出根据一些实施例的HEW通信和遗留通信可以发生的时间-频率空间;
图5示出根据一些其它实施例的HEW通信和遗留通信可以发生的时间-频率空间;
图6示出根据一些其它实施例的同时进行的HEW通信和遗留通信;
图7示出非同时进行的HEW通信和遗留通信;
图8示出根据一些实施例的无线通信设备。
具体实施方式
以下描述和附图充分示出特定实施例以使得本领域技术人员能够实践它们。其它实施例可以包括结构改变、逻辑改变、电改变、处理改变和其它改变。一些实施例的部分或特征可以包括于或替代以其它实施例的部分和特征。权利要求中所阐述的实施例囊括这些权利要求的所有可用等同物。
图1示出根据一些实施例的无线网络。该无线网络可以包括基本服务集(BSS)100,其可以包括接入点(AP)102、多个HEW(例如,IEEE802.11ax)设备104以及多个遗留(例如,IEEE802.11n/ac)设备106。BSS100可以在主级信道以及一个或多个次级信道上操作。根据实施例,当主级信道202被用于与遗留设备106中的一个或多个的通信时,接入点102可以根据受调度的多址通信技术在次级信道中的一个或多个上与HEW设备104中的一个或多个进行通信。在这些实施例中,当根据遗留IEEE802.11n和IEEE802.11ac技术与遗留设备106进行的通信仅发生在主级信道上时,基于遗留IEEE802.11标准可能禁止同时使用任何次级信道,使该带宽变为闲置的并且被浪费。在此所公开的实施例可以通过允许HEW设备104在次级信道上的闲置的被浪费的带宽内进行通信来利用该带宽。这允许遗留设备106与HEW设备104在相同的时间分配下共享大带宽的一部分。以下更详细地讨论这些实施例。在一些实施例中,接入点102可以被配置为:在次级信道中的一个或多个上与HEW设备104中的一个或多个进行通信,并且仅利用主级信道而不利用任何次级信道与遗留设备106同时进行通信。以下也更详细地讨论这些实施例。
根据一些HEW实施例,接入点102可以操作为主站,其可以被布置为:(例如,在竞争时段期间)竞争无线介质,以接收介质的独占控制达HEW控制时段(即,传输机会(TXOP))。接入点102可以在HEW控制时段的开始时发送HEW主同步传输。在HEW控制时段期间,HEW设备104可以根据基于非竞争的多址技术来与接入点102进行通信。这不同于设备根据基于竞争的通信技术而非多址技术进行通信的传统Wi-Fi通信。在HEW控制时段期间,接入点102可以使用一个或多个HEW帧与HEW设备104进行通信。在HEW控制时段期间,遗留设备106抑制通信。在一些实施例中,主同步传输可以称为HEW控制和调度传输。
在一些实施例中,在HEW控制时段期间使用的多址技术可以是基于非竞争的技术(例如,受调度的正交频分多址(OFDMA)技术),但这不是要求。在一些实施例中,多址技术可以是时分多址(TDMA)技术或频分多址(FDMA)技术。在一些实施例中,多址技术可以是空分多址(SDMA)技术。
在一些实施例中,在HEW控制时段期间,SDMA技术可以连同OFDMA一起用于与受调度的HEW设备进行的通信。例如,在10MHzOFDMA分配中,接入点可以调度两个上行链路用户的传输的空间复用。
接入点102也可以根据遗留IEEE802.11通信技术与遗留设备106进行通信。在一些实施例中,接入点102也可以被配置为:根据遗留IEEE802.11通信技术在HEW控制时段之外与HEW设备104进行通信,但这并非要求。遗留IEEE802.11通信技术可以指代IEEE802.11ax之前的任何IEEE802.11通信技术。
在一些实施例中,HEW帧可配置为具有相同带宽,并且带宽可以是20MHz、40MHz或80MHz连续的(contiguous)带宽,或者80+80MHz(160MHz)非连续的带宽之一。在一些实施例中,可以使用320MHz连续的带宽。在一些实施例中,也可以使用1MHz、1.25MHz、2.5MHz、5MHz和10MHz或其组合的带宽。在这些实施例中,HEW帧可以被配置用于传输多个空间流。
图2示出根据一些实施例的HEW网络通信可以发生的时间-频率空间。接入点102(图1)可以被布置为:在竞争时段206期间竞争无线介质,以接收介质的独占控制持续HEW控制时段210。接入点102也可以被布置为:在HEW控制时段210的开始时发送HEW控制和调度传输208。如上所述,HEW控制和调度传输208可以至少包括指示用于在HEW控制时段208期间与HEW设备104(图1)进行的至少一些通信的信道资源的调度。
在这些实施例中,HEW控制和调度传输208中所指示的信道资源包括信道带宽内的子空间。子空间可以包括用于具有HEW信道带宽的HEW信道的时间-频率资源。在这些实施例中,接入点102也可以被布置为:在HEW控制时段210期间在所指示的信道资源内的HEW信道之一上与每个受调度的HEW设备104进行通信。
在这些实施例中,所指示的信道资源可以包括频率带宽和时隙信息。每个子空间可以由一个或多个遗留信道带宽(例如,20MHz)内的特定频带定义,并且定义为特定OFDM符号或时隙。
在图2所示的示例中,HEWOFDMA分配使用具有10MHz最小信道带宽的HEW信道。在该示例中,总共十六个HEW设备在子空间之一内被分配信道资源。在图2所示的示例中,遗留设备106(图1)被示为在HEW控制时段210之外在20MHz主级信道202上进行通信,并且宽带信道带宽被示为包括四个20MHz遗留信道的80MHz带宽。HEW信道被示为与一个或多个20MHz遗留信道对准。在这些实施例中,任何HEW信道上的传输被配置为:至少在HEW前导的遗留部分上使符号时间在每个遗留信道内对准。相应地,当遗留设备106使用信号检测技术检测到遗留信道上的传输时,传输将表现为遗留传输,从而使遗留设备106延迟传输。以下描述用于OFDMA通信的其它最小信道带宽。
在一些实施例中,用于OFDMA传输(例如,根据IEEE802.11ax)的符号持续时间可以与遗留符号持续时间不同。在这些实施例中,任何OFDMAHEW信道上的传输可以被配置为:仅对于HEW前导的遗留部分使符号时间在每个遗留信道内对准。
在图2所示的实施例中,HEW通信被示为在HEW控制时段210期间在整个信道带宽上发生,而遗留通信在HEW控制时段210之外发生。在这些实施例中,HEW通信可以在主级信道202以及一个或多个次级信道204上同时发生。在此所公开的其它实施例提供HEW通信与遗留通信同时发生。以下更详细地描述这些实施例。
图3示出遗留通信可以发生的时间-频率空间。图3示出包括20MHz主级信道202以及其余带宽内的三个20MHz次级信道204的80MHz带宽的示例。遗留设备106(图1)可以被配置用于主级信道上的20MHz操作305以及主级信道202和次级信道204中的一个或多个上的更宽带宽操作307(例如80MHz)。一个问题在于,当遗留设备在主级信道202上操作时,次级信道的带宽304可能变为闲置的并且可能被浪费。当另一BSS利用不同主级信道316时,产生类似情形,使得其它信道的带宽314变为闲置的。
带宽304和带宽314变为闲置的一个原因是来自相邻主级信道中的遗留操作的干扰的影响。以下更详细地描述的实施例允许HEW设备104使用这种闲置的带宽。在这些实施例中,HEW设备104可以包括更严格的频谱掩码以及更严格的滤波和振荡器要求,以减少相邻信道干扰的影响并且使得能够在相邻信道中进行OFDMA操作。遗留设备106无需满足这些更严格的要求,然而,HEW设备104所使用的更严格的频谱掩码减少对遗留设备106的影响并且允许遗留设备106在相邻信道上进行通信,而不受HEW设备104在相邻信道上进行的OFDMA通信影响。因此,当HEW设备104正在相邻信道中进行通信时,遗留设备106无需按低调制和编码方案(MCS)进行通信。此外,归因于HEW设备104所使用的更严格的频谱掩码,遗留信号字段(L-SIG)将能够由遗留设备106可靠地读取,从而允许遗留设备106确定相邻信道上和/或主级信道上的HEW通信的传输时间,并且相应地延迟它们的传输。
图4示出根据一些实施例的HEW通信和遗留通信可以发生的时间-频率空间。如图4所示,在遗留设备通信可以发生在主级信道202上的同时,HEW设备通信可以发生在一个或多个次级信道204上。在图4所示的示例中,在单个遗留设备在主级信道202上与接入点102进行通信的同时,三个HEW设备104均可以在HEW控制和调度传输208之后在20MHz次级信道204中的一个上进行通信。
图5示出根据一些其它实施例的HEW通信和遗留通信可以发生的时间-频率空间。如图5所示,在遗留设备通信可以发生在主级信道202上的同时,HEW设备通信可以发生在一个或多个次级信道204上。在图5所示的示例中,在单个遗留设备在主级信道202上与接入点102进行通信的同时,十四个HEW设备在HEW控制和调度传输208之后借助次级信道204的带宽进行通信。在该示例中,HEW分配使用具有10MHz最小信道带宽的HEW信道。在一些实施例中,可以使用更小的HEWOFDMA带宽分配(例如5MHz、2.5MHz、1.25MHz和1MHz)。在一些实施例中,HEWOFDMA带宽分配可以包括利用具有64点FFT大小的14个子载波的4.375MHz信道。在其它实施例中,HEWOFDMA通信可以利用具有更大FFT大小(例如256点FFT(例如,对于带宽分配为1至1.25MHz的实施例))的14个子载波,但实施例的范围不限于此。
在图5所示的示例中,与HEW设备104的通信发生在HEW控制时段210期间,在此期间,操作为主站的接入点102可能已经获得次级信道204上的TXOP。在HEW控制时段210期间与HEW设备104的通信可以包括上行链路通信或下行链路通信。
根据一些实施例,当主级信道202被用于与遗留设备106中的一个或多个的通信时,接入点102可以根据受调度的OFDMA通信技术在次级信道204中的一个或多个上与HEW设备104中的一个或多个进行通信。当在次级信道204中的一个或多个上与HEW设备104中的一个或多个并且在主级信道202上与遗留设备106同时进行通信时,接入点102可以抑制在任何次级信道104上与遗留设备106进行通信。在这些实施例中,接入点102可以被配置为:当接入点102在次级信道204中的一个或多个上与HEW设备104中的一个或多个进行通信的同时,对于与遗留设备106进行通信,仅使用主级信道202而不利用任何次级信道204。
在一些实施例中,接入点102可配置为:在根据基于竞争的通信技术仅利用主级信道202与遗留设备106进行通信的同时,根据基于非竞争的多址通信技术在次级信道204中的一个或多个上与HEW设备104中的一个或多个进行通信。在这些实施例中,当与HEW设备104进行通信时,接入点102可以操作为主站。
在一些实施例中,被用于与一个或多个HEW设备104进行通信的基于非竞争的多址通信技术可以是受调度的OFDMA技术。基于竞争的通信技术可以包括载波侦听多址接入/冲突回避(CSMA/CA)技术、载波侦听多址接入/冲突检测(CSMA/CD)技术以及增强CSMA/CA(e-CSMA/CA)技术。
在这些实施例中,接入点102可配置为:根据遗留(即IEEE802.11n/ac)通信技术使用主级信道202以及多达一个或多个次级信道204与遗留设备106进行通信。接入点102也可配置为:根据遗留(即IEEE802.11b和IEEE802.11g/a)通信技术与遗留设备106进行通信。在这些实施例中,接入点102可配置为:根据HEW(即IEEE802.11ax)技术在主级信道和次级信道所占据的带宽内与HEW设备104进行通信。
在这些实施例中,当根据遗留IEEE802.11n和IEEE802.11ac技术与遗留设备106进行的通信仅发生在20MHz主级信道上时,基于遗留802.11标准可能禁止同时使用任何次级信道204,使该带宽变为闲置的并且被浪费。在此所公开的实施例可以通过允许HEW设备104在次级信道204上的闲置的被浪费的带宽304、314(见图3)内进行通信来利用该带宽。这允许遗留设备106与HEW设备104在相同的时间分配下共享大带宽的一部分。
在一些实施例中,当接入点102可以将其传输配置为这样的:不冒在下行链路数据到一个或多个HEW设备104的传输期间无法从遗留设备106接收上行链路数据的风险时。在这些实施例中,接入点102可以是发送模式或接收模式。以下参照图6和图7讨论这些实施例。
图6示出根据一些其它实施例的同时进行的HEW通信和遗留通信。在这些实施例中,在发送模式期间,接入点102可以被配置为:同时在次级信道204中的一个或多个上将HEW下行链路数据604发送到一个或多个HEW设备104并且在主级信道202上将遗留下行链路数据606发送到遗留设备106。在接收模式期间,接入点102可以被配置为:同时在次级信道204中的一个或多个上从一个或多个HEW设备104接收HEW上行链路数据614并且在主级信道202上从遗留设备106接收遗留上行链路数据616。可以在接收下行链路数据与发送上行链路数据之间提供相对短的帧间间隔(SIFS)603。在这些实施例中,接入点102对于所有信道可以处于接收模式或发送模式(但并非二者)下,以允许在任何信道上进行同时发送或同时接收。
如图6进一步所示,HEW设备接收下行链路数据604与遗留设备106接收下行链路数据606之间可能存在传播延迟和定时获取的差异(见标号601A和601B),导致在不同时间接收下行链路数据。此外,传播延迟和SIFS精度的差异例如可能导致接入点102在不同时间接收上行链路数据614和616(见标号606)。
在图6所示的示例情形中,由于HEW下行链路数据604当前随着遗留下行链路数据606到遗留设备106的发送而发送到一个或多个HEW设备104,因此数据同时从HEW设备104和遗留设备接收。在该情形中,由于接入点102可以处于接收模式下,因此接入点102能够与在主级信道202上从遗留设备106接收遗留上行链路数据616同时地在次级信道204中的一个或多个上从一个或多个HEW设备104接收HEW上行链路数据614。如果HEW下行链路数据604没有与遗留下行链路数据606到遗留设备106的发送同时地被发送到一个或多个HEW设备104,则情况可能并非如此。
图7示出非同时进行的HEW通信和遗留通信。在该图示中,可以在不同时间发送HEW下行链路数据704和遗留下行链路数据706,并且因此,接入点102可能无法在下行链路数据704到一个或多个HEW设备104的发送期间从遗留设备106接收上行链路数据716(见标号705)(即,因为接入点102将处于发送模式而非接收模式下)。
根据实施例,接入点102可以被配置为:在没有同时地在主级信道202上将遗留下行链路数据706发送到遗留设备106的情况下,抑制在一个或多个次级信道204上将HEW下行链路数据704发送到一个或多个HEW设备104。在这些实施例中,通过在没有同时地在主级信道202上发送遗留下行链路数据706的情况下抑制在一个或多个次级信道204上发送HEW下行链路数据704,接入点102不冒在下行链路数据704到一个或多个HEW设备104的发送期间无法从遗留设备106接收上行链路数据716的风险。
根据一些实施例,接入点102可以被配置为:当预测到要在主级信道上从遗留站接收即将到来的上行链路分组时,在没有同时地在主级信道上将遗留下行链路数据发送到遗留设备106的情况下,抑制在一个或多个次级信道204上将HEW下行链路数据704发送到一个或多个HEW设备104。例如,接入点102可以预期从遗留站106在主级信道202上接收ACK。
在一些实施例中,接入点102可以在竞争时段206期间竞争包括主级信道和次级信道中的一个或多个的带宽。当在次级信道204中的一个或多个上获得传输机会(TXOP)但未在主级信道202上获得传输机会(例如,主级信道可能因此是忙碌的)时,除非接入点正在同时对遗留设备进行发送,否则至少当接入点预期到在TXOP内从遗留接收分组时,接入点102可以抑制与一个或多个HEW设备104在次级信道204中的一个或多个上进行通信。在这些实施例中,仅当接入点102正在对遗留设备106进行发送时,接入点102可以与一个或多个HEW设备104在次级信道204中的一个或多个上进行通信。因此,接入点102在HEW下行链路数据704到一个或多个HEW设备104的发送期间无法从遗留设备106接收上行链路数据716(见标号705)的风险得以减少或消除。在一些实施例中,接入点102可以根据CSMA-CA协议竞争带宽,以获得TXOP。
在一些实施例中,当主级信道202忙碌时,接入点102可以被配置为:在竞争时段206期间在次级信道204中的一个或多个上竞争带宽。当在次级信道204中的一个或多个上获得TXOP时,接入点102被配置为:在主级信道忙碌的TXOP期间,在次级信道204中的一个或多个上根据受调度的OFDMA技术与HEW设备104中的至少一些进行通信。在这些实施例中,主级信道202可能因为接入点102正在对BSS100的遗留设备106进行发送所以是忙碌的。主级信道202可能还因为使用与BSS100的主级信道202相同的信道进行另一BSS的传输所以是忙碌的。例如,另一BSS的遗留设备可能使用与BSS100的主级信道202相同的信道对其它BSS的接入点进行发送。在这两种情况下,由发送设备在主级信道202上所发送的L-SIG将使得任一BSS上的其它设备的网络分配矢量(NAV)被设置为将主级信道202标为忙碌。例如,如图3中的标号指示符316所指示的那样,当次级信道中的一个或多个被用作另一BSS的主级信道时,也可能是忙碌的。
在这些实施例中,接入点102可以被配置为:独立地但同时地根据基于竞争的通信技术在主级信道202上与遗留设备106之一进行通信并且根据基于非竞争的多址通信技术在一个或多个次级信道204上与HEW设备104中的至少一些进行通信。
在一些实施例中,当在次级信道204中的一个或多个上获得TXOP但未在主级信道202上获得TXOP时,接入点102可以在HEW控制时段210的开始时在一个或多个次级信道204上发送HEW控制传输208,以调度在次级信道204中的一个或多个上在HEW控制时段210期间与HEW设备104中的至少一些进行的通信,并且要么:基于在HEW控制传输208中提供给受调度的HEW设备104的调度信息而在一个或多个次级信道204上在HEW控制时段210期间将下行链路数据发送到受调度的HEW设备;要么,基于在HEW控制传输208中提供给受调度的HEW设备104的调度信息而在一个或多个次级信道204上在HEW控制时段210期间从受调度的HEW设备接收上行链路数据。在这些实施例中,接入点102在将下行链路数据发送到受调度的HEW设备104时,可以在HEW控制时段210期间在主级信道202上对遗留设备106同时进行发送,或者在从受调度的HEW设备104接收上行链路数据时,可以在HEW控制时段210期间在主级信道202上从遗留设备106同时进行接收。
在一些实施例中,HEW控制传输208可以至少包括指示用于根据受调度的OFDMA技术在HEW控制时段210期间与HEW设备104进行通信的信道资源的调度。信道资源可以包括用于在次级信道内具有HEW信道带宽的HEW信道的子空间。HEW信道带宽可以包括20MHz信道带宽中的10MHz、5MHz、2.5MHz、1.25MHz和1MHz子部分中的一个或多个,以分别定义10MHz、5MHz、2.5MHz、1.25MHz和1MHzHEW信道,并且10MHz、5MHz、2.5MHz和1MHzHEW信道上的传输可以被配置为:使符号时间在20MHz信道内对准。在以上所讨论的一些实施例中,HEW信道带宽可以包括利用十四个子载波的4.375MHz信道,但实施例的范围不限于此。
在一些实施例中,主级信道202可以包括20MHz信道,次级信道204包括20MHz信道中的一个或多个。在这些实施例中,可以通过使用主级信道202以及一个或多个次级信道204来提供40MHz、80MHz和160MHz的带宽。在一些实施例中,可以提供320MHz带宽。
在一些实施例中,主级信道202可以包括40MHz信道,次级信道204包括40MHz信道。在这些实施例中,主级信道202可以包括40MHz信道,次级信道204可以包括单个40MHz信道,以提供高达80MHz的带宽。在一些其它实施例中,主级信道202可以包括80MHz信道,次级信道204可以包括单个80MHz信道,以提供高达160MHz的带宽。
图8示出根据一些实施例的HEW设备。HEW设备800可以是HEW顺应设备,其可以被布置为与一个或多个其它HEW设备(例如HEW设备104(图1)或接入点102(图1))进行通信并且与遗留设备106(图1)进行通信。HEW设备104和遗留设备106也可以分别称为HEW站(STA)和遗留STA。HEW设备800可以适合于操作为接入点102(图1)或HEW设备104(图1)。根据实施例,其中,HEW设备800可以包括物理层(PHY)电路802和介质访问控制层电路(MAC)804。PHY802和MAC804可以是HEW顺应层,并且也可以顺应于一个或多个遗留IEEE802.11标准。其中,MAC804可以被布置为配置PPDU,并且被布置为发送而且接收PPDU。HEW设备800还可以包括被配置为执行在此所描述的各种操作的硬件处理电路806和存储器808。
在一些实施例中,MAC804可以被布置为:在竞争时段期间竞争无线介质,以接收介质的控制达HEW控制时段,并且配置HEWPPDU。PHY802可以被布置为:发送HEWPPDU。PHY802可以包括用于调制/解调、上转换/下转换、滤波、放大等的电路。在一些实施例中,硬件处理电路806可以包括一个或多个处理器。在一些实施例中,两个或更多个天线可以耦合到PHY802,并且被布置用于发送而且接收包括HEW分组的传输的信号。存储器808可以存储信息,以用于将另外电路配置为执行用于配置并且发送HEW分组的操作而且执行在此所描述的各种操作。
在一些实施例中,HEW设备800可以被配置为:通过多载波通信信道使用OFDM通信信号进行通信。在一些实施例中,HEW设备800可以被配置为:根据一个或多个特定通信标准(例如包括IEEE802.11-2012、802.11n-2009、802.11ac-2013、802.11ax标准的电气与电子工程师协会(IEEE)标准)和/或所提出的用于WLAN的规范进行通信,但本发明的范围不限于此,因为它们也可以适合于根据其它技术和标准发送和/或接收通信。
在一些实施例中,HEW设备800可以是便携式无线通信设备(例如个人数字助理(PDA)、具有无线通信能力的膝上型或便携式计算机、web平板、无线电话、智能电话、无线耳机、寻呼机、即时传信设备、数码相机、接入点、电视、媒体设备(例如心率监测器、血压监测器等)或其它可以通过无线方式接收和/或发送信息的设备)的部分。在一些实施例中,移动设备可以包括键盘、显示器、非易失性存储器端口、多个天线、图形处理器、应用处理器、扬声器以及其它移动设备元件中的一个或多个。显示器可以是包括触摸屏的LCD屏幕。
天线可以包括一个或多个方向性天线或全向性天线,包括例如双极天线、单极天线、贴片天线、环路天线、微带天线或适合于传输RF信号的其它类型的天线。在一些多入多出(MIMO)实施例中,天线可以有效地分离以利用空间分集以及可能产生的不同信道特性。
虽然设备800被示为具有若干分离功能元件,但功能元件中的一个或多个可以组合并且可以由软件配置的元件(例如包括数字信号处理器的处理元件)和/或其它硬件元件的组合实现。例如,一些元件可以包括一个或多个微处理器、DSP、现场可编程门阵列(FPGA)、专用集成电路(ASIC)、射频集成电路(RFIC)以及用于至少执行在此所描述的功能的各种硬件和逻辑电路的组合。在一些实施例中,功能元件可以指代一个或多个处理元件上操作的一个或多个处理。
实施例可以实现于硬件、固件和软件之一或其组合中。实施例也可以实现为计算机可读存储设备上所存储的指令,计算机可读存储设备可以由至少一个处理器读取并且执行以执行在此所描述的操作。计算机可读存储设备可以包括用于以机器可读的形式存储信息的任何非瞬时机构(例如计算机)。例如,计算机可读存储设备可以包括只读存储器(ROM)、随机存取存储器(RAM)、磁盘存储介质、光存储介质、闪存设备以及其它存储设备和介质。一些实施例可以包括一个或多个处理器,并且可以被配置有计算机可读存储设备上所存储的指令。
提供摘要以符合要求将允许读者确知技术公开的性质和主旨的摘要的37C.F.R章节1.72(b)。应理解,其将不用于限制或解释权利要求的范围或涵义。所附权利要求由此合并到具体实施方式,其中,每一权利要求自身代表单独优选实施例。
Claims (22)
1.一种接入点(AP),被配置为:操作为包括多个高效率WLAN(HEW)站和多个遗留站的基本服务集(BSS)的一部分,所述BSS在主级信道以及一个或多个次级信道上操作,所述接入点包括硬件处理电路,所述硬件处理电路被配置为:
当所述主级信道被用于与所述遗留设备中的一个或多个的通信时,根据受调度的OFDMA通信技术在所述次级信道中的一个或多个上与所述HEW站中的一个或多个进行通信。
2.如权利要求1所述的接入点,还被配置为:当在所述次级信道中的一个或多个上与所述HEW站中的一个或多个并且在所述主级信道上与所述遗留站同时进行通信时,抑制在任何所述次级信道上与所述遗留站进行通信。
3.如权利要求2所述的接入点,还能够被配置为:在根据基于竞争的通信技术仅利用所述主级信道与所述遗留站进行通信的同时,根据所述受调度的OFDMA通信技术在所述次级信道中的一个或多个上与所述HEW站中的一个或多个进行通信,
其中,所述接入点被配置为:当与所述HEW站进行通信时操作为主站。
4.如权利要求3所述的接入点,其中,所述受调度的OFDMA通信技术是被用于与所述一个或多个HEW站进行通信的基于非竞争的多址通信技术,并且
其中,所述基于竞争的通信技术包括载波侦听多址接入/冲突回避(CSMA/CA)技术、载波侦听多址接入/冲突检测(CSMA/CD)技术和增强CSMA/CA(e-CSMA/CA)技术。
5.如权利要求3所述的接入点,其中,所述接入点能够被配置为:处于发送模式或接收模式下,
其中,在所述发送模式期间,所述接入点被配置为同时进行以下操作:
在所述次级信道中的一个或多个上将HEW下行链路数据发送到所述一个或多个HEW设备;以及
在所述主级信道上将遗留下行链路数据发送到所述遗留设备,
其中,在所述接收模式期间,所述接入点被配置为同时进行以下操作:
在所述次级信道中的一个或多个上从所述一个或多个HEW设备接收HEW上行链路数据;以及
在所述主级信道上从所述遗留设备接收遗留上行链路数据。
6.如权利要求5所述的接入点,还被配置为:当预测到要在所述主级信道上从遗留站接收即将到来的上行链路分组时,在没有同时地在所述主级信道上将所述遗留下行链路数据发送到所述遗留设备的情况下,抑制在所述一个或多个次级信道上将所述HEW下行链路数据发送到所述一个或多个HEW设备。
7.如权利要求6所述的接入点,还被配置为:
在竞争时段期间竞争包括所述主级信道和所述次级信道中的一个或多个的带宽;
当在所述次级信道中的一个或多个上获得传输机会(TXOP)而在所述主级信道上未获得传输机会时,所述接入点被配置为:
至少当所述接入点预期到在所述TXOP内从遗留接收分组时并且除非所述接入点正在同时对所述遗留站进行发送,否则抑制与所述一个或多个HEW设备在所述次级信道中的一个或多个上进行通信。
8.如权利要求2所述的接入点,其中,当所述主级信道忙碌时,所述接入点还被配置为:
在竞争时段期间竞争所述次级信道中的一个或多个上的带宽;
当在所述次级信道中的一个或多个上获得传输机会(TXOP)时,所述接入点被配置为:
在所述TXOP期间,在所述次级信道中的一个或多个上根据受调度的OFDMA技术与所述HEW站中的至少一些进行通信。
9.如权利要求4所述的接入点,其中,当在所述次级信道中的一个或多个上获得传输机会(TXOP)但在所述主级信道上未获得传输机会时,所述接入点被配置为:
在包含所述TXOP的HEW控制时段的开始时在所述一个或多个次级信道上发送HEW控制传输,以调度在所述次级信道中的一个或多个上在所述HEW控制时段期间与所述HEW设备中的至少一些的通信;以及要么
基于在所述HEW控制传输中提供给所述受调度的HEW站的调度信息,在所述一个或多个次级信道上在所述HEW控制时段期间将下行链路数据发送到所述受调度的HEW站,要么
基于在所述HEW控制传输中提供给所述受调度的HEW站的所述调度信息,在所述一个或多个次级信道上在所述HEW控制时段期间从所述受调度的HEW站接收上行链路数据,以及
当将下行链路数据发送到所述受调度的HEW站时,在所述HEW控制时段期间在所述主级信道上对所述遗留站同时进行发送,或
当从所述受调度的HEW站接收上行链路数据时,在所述HEW控制时段期间在所述主级信道上从所述遗留站同时进行接收。
10.如权利要求9所述的接入点,其中,所述HEW控制传输至少包括指示用于根据所述受调度的OFDMA技术在所述HEW控制时段期间与所述HEW设备的通信的信道资源的调度,
其中,所述信道资源包括用于所述次级信道内具有HEW信道带宽的HEW信道的子空间,
其中,所述HEW信道带宽包括20MHz信道带宽中的10MHz、5MHz、2.5MHz、1.25MHz和1MHz子部分中的一个或多个,以分别定义10MHz、5MHz、2.5MHz、1.25MHz和1MHzHEW信道,并且
其中,所述HEW信道上的传输被配置为:至少对于前导的遗留部分,使符号时间在20MHz信道内对准。
11.如权利要求4所述的接入点,其中,所述主级信道包括20MHz信道,并且所述次级信道包括20MHz信道中的一个或多个。
12.如权利要求4所述的接入点,其中,所述主级信道包括40MHz信道,并且所述次级信道包括40MHz信道。
13.一种由接入点执行的方法,所述接入点是包括多个HEW站和多个遗留站的基本服务集(BSS)的一部分,所述BSS在主级信道以及一个或多个次级信道上操作,所述方法包括:
当所述主级信道被用于与所述遗留设备中的一个或多个的通信时,根据受调度的OFDMA通信技术在所述次级信道中的一个或多个上与所述HEW站中的一个或多个进行通信。
14.如权利要求13所述的方法,还包括:当在所述次级信道中的一个或多个上与所述HEW站中的一个或多个并且在所述主级信道上与所述遗留站同时进行通信时,抑制在任何所述次级信道上与所述遗留站进行通信。
15.如权利要求14所述的方法,还包括:
在根据基于竞争的通信技术仅利用所述主级信道与所述遗留站进行通信的同时,根据基于非竞争的多址通信技术在所述次级信道中的一个或多个上与所述HEW站中的一个或多个进行通信,
其中,所述接入点被配置为:当与所述HEW站进行通信时操作为主站。
16.如权利要求15所述的方法,其中,所述接入点能够被配置为:处于发送模式或接收模式下,
其中,在所述发送模式期间,所述方法包括:同时进行以下操作:
在所述次级信道中的一个或多个上将HEW下行链路数据发送到所述一个或多个HEW设备;以及
在所述主级信道上将遗留下行链路数据发送到所述遗留设备,
其中,在所述接收模式期间,所述方法包括:同时进行以下操作:
在所述次级信道中的一个或多个上从所述一个或多个HEW设备接收HEW上行链路数据;以及
在所述主级信道上从所述遗留设备接收遗留上行链路数据。
17.如权利要求16所述的方法,还包括:当预测到要在所述主级信道上从遗留站接收即将到来的上行链路分组时,在没有同时地在所述主级信道上将所述遗留下行链路数据发送到所述遗留设备的情况下,抑制在所述一个或多个次级信道上将所述HEW下行链路数据发送到所述一个或多个HEW设备。
18.一种存储有指令的非瞬时计算机可读存储介质,所述指令由一个或多个处理器执行,以执行配置接入点的操作,所述接入点是包括多个HEW站和多个遗留站的基本服务集(BSS)的一部分,所述BSS在主级信道以及一个或多个次级信道上操作,所述指令将所述接入点配置为:
当所述主级信道被用于与所述遗留设备中的一个或多个的通信时,根据受调度的OFDMA通信技术在所述次级信道中的一个或多个上与所述HEW站中的一个或多个进行通信。
19.如权利要求18所述的非瞬时计算机可读存储介质,其中,所述指令还将所述接入点配置为:当在所述次级信道中的一个或多个上与所述HEW站中的一个或多个并且在所述主级信道上与所述遗留站同时进行通信时,抑制在任何所述次级信道上与所述遗留站进行通信。
20.如权利要求19所述的非瞬时计算机可读存储介质,其中,所述指令还将所述接入点配置为:在根据基于竞争的通信技术仅利用所述主级信道与所述遗留站进行通信的同时,根据基于非竞争的多址通信技术在所述次级信道中的一个或多个上与所述HEW站中的一个或多个进行通信。
21.一种高效率WLAN(HEW)站,被配置为:操作为包括接入点和多个遗留站的基本服务集(BSS)的一部分,所述BSS在主级信道以及一个或多个次级信道上操作,所述HEW站包括硬件处理电路,所述硬件处理电路被配置为:
当所述主级信道被用于与所述遗留设备中的一个或多个的通信时,根据受调度的OFDMA通信技术在所述次级信道中的一个或多个上与所述接入点进行通信。
22.如权利要求21所述的HEW站,其中,所述HEW站还被配置为:
在HEW控制时段的开始时在所述一个或多个次级信道上接收HEW控制传输,所述HEW控制传输包括用于在所述次级信道中的一个或多个上在所述HEW控制时段期间与所述HEW设备中的至少一些进行通信的调度;以及要么
基于所述HEW控制传输中提供的调度信息,在所述一个或多个次级信道上在所述HEW控制时段期间接收下行链路数据,要么
基于所述HEW控制传输中提供的所述调度信息,在所述一个或多个次级信道上在所述HEW控制时段期间发送上行链路数据。
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