CN104170521B - 小区内设备到设备通信的集中控制 - Google Patents
小区内设备到设备通信的集中控制 Download PDFInfo
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Abstract
本文公开了用于集中地建立并控制无线通信网络的授权频带上的小区内设备到设备连接。eNodeB从第一设备接收请求以便与第二设备进行通信,或者从所述第一设备接收对于内容或服务的请求。所述eNodeB在所述第一设备与至少一个候选设备之间调度设备发现。基于由所述第一设备与所述候选设备中的一个生成的发现报告,所述eNodeB确定在所述第一设备与所述候选设备之间建立设备到设备连接。所述发现报告包含关于在所调度的设备发现期间来自所述第一设备或所述候选设备中的一个并且被所述第一设备或所述候选设备中的另一个接收的传输的信号质量的信息。
Description
优先权要求
本申请要求享有于2012年6月29日递交的序列号为13/537,568的美国专利申请的优先权,该美国专利申请要求享有于2012年1月27日递交的发明名称为“AdvancedWireless Communication Systems and Techniques”并且序列号为61/591,641的美国临时专利申请的优先权,这两个专利申请的内容通过引用的方式以整体并入本文。
技术领域
本公开总体上涉及无线通信。更具体地,本公开涉及在授权频带上的设备到设备通信。
背景技术
随着多媒体服务、游戏服务以及社交网络服务的涌现,数据业务的日益增加的量发起并终接于设备处。当这些设备是无线设备并且在授权频带无线接入网络(例如,长期演进(LTE)网络)内操作时,通信路径包括从发起设备到基站的无线数据传输、沿着核心网络的可能的数据传送以及从基站到终接设备的另一无线数据传输。然而,当发起设备和终接设备彼此相对紧密接近时,这样的通信路径可能是对信道资源的浪费。相反,对信道资源的更好的使用可能是使能设备之间的直接通信。
然而,由于设备全方位地进行传输,这意味着该传输在所有方向上圆形地向外辐射,尝试与终接设备进行直接通信的发起设备也会无意地传输到一个或多个临近设备。所造成的干扰可能足够严重,以使得终接设备和临近设备二者都不能够接收到它们想要接收到的传输。允许直接通信可能实际上最终降低了网络效率而不是提高了对信道资源的使用。
即使与设备之间的直接通信相关联的干扰极小或者被以其它方式管理,网络运营商也更喜欢维持对其信道资源的使用的控制;这不仅仅是为了服务质量(QoS)和干扰管理,而且还为了准确地分配对其授权频带的使用的数据服务费用。
发明内容
在一个方面,提供一种用于控制无线通信网络的授权频带上的设备到设备连接的增强型节点B(eNodeB),所述eNodeB包括:收发机,用于从第一设备接收与第二设备进行通信的请求或者从所述第一设备接收对于内容或服务的请求;处理器,与所述收发机进行通信,所述处理器用于在所述第一设备与至少一个候选设备之间调度设备发现,并且用于基于由所述第一设备或候选设备中的一个生成的发现报告来确定在所述第一设备与所述候选设备之间建立所述设备到设备连接,其中,所述发现报告包括关于在所调度的设备发现期间来自所述第一设备或所述候选设备中的另一个,并且由所述第一设备或所述候选设备中的一个接收的传输的信号质量的信息。
优选地,所述处理器确定调度信息以便建立所述设备到设备连接,并且其中,所述收发机向所述第一设备与所述候选设备中的每一个传输所述调度信息以便建立所述设备到设备连接。当从所述第一设备接收到的请求是与所述第二设备进行通信时,所述候选设备是所述第二设备。所述处理器基于所述至少一个候选设备到所述第一设备的接近度来确定所述至少一个候选设备。所述处理器基于所述候选设备提供由所述第一设备请求的所述内容或服务的可用性来确定所述至少一个候选设备。与所述处理器进行通信的存储器包括关于提供由所述第一设备请求的所述内容或服务的设备的可用性的信息。所述设备发现包括给所述第一设备或所述候选设备中的所述另一个的第一指令以便在所调度的设备发现期间传输特定消息,以及给所述第一设备或所述候选设备中的所述一个的第二指令以便在所调度的设备发现期间以接收模式运行。所述设备发现包括给所述第一设备或所述候选设备中的所述另一个的第三指令以便传输关于所请求的所述内容或服务的信息,以及给所述第一设备或所述候选设备中的所述一个的第四指令以便当从所述第一设备接收到的所述请求是针对所述内容或服务时,确认所述内容或服务的可用性,并且其中,所述第一设备或所述候选设备中的所述另一个包括所述第一设备,并且所述第一设备或所述候选设备中的所述一个包括所述候选设备。所述设备发现包括给所述第一设备或所述候选设备中的所述另一个的第三指令以便当从所述第一设备接收到的所述请求是针对所述内容或服务时,将由所述第一设备或所述候选设备中的所述另一个提供的内容或服务包括在所述特定消息中,并且其中,所述第一设备或所述候选设备中的所述另一个包括所述候选设备,并且所述第一设备或所述候选设备中的所述一个包括所述第一设备。所述收发机在没有来自所述eNodeB的指令的情况下自动地从所述候选设备接收关于所述内容或服务的可用性信息。所述无线通信网络包括第三代合作伙伴计划(3GPP)长期演进(LTE)网络。
在另一方面,提供一种增强型节点B(eNodeB),包括:收发机,用于从第一设备接收与第二设备进行通信的请求或者从所述第一设备接收对于内容或服务的请求;处理器,与所述收发机进行通信,所述处理器用于在所述第一设备与至少一个候选设备之间调度设备发现,并且用于基于由所述第一设备或候选设备中的一个生成的发现报告来确定在所述第一设备与所述候选设备之间建立设备到设备连接,其中,所述发现报告包括关于在所调度的设备发现期间传输信号质量的信息,并且其中,所述第一设备和所述候选设备二者都位于由所述eNodeB服务的小区内。
优选地,所述发现报告包括关于在所调度的设备发现期间来自所述第一设备或所述候选设备中的另一个并且由所述第一设备或所述候选设备中的一个接收的传输的信号质量的信息。所述处理器确定通过在建立单向设备到设备连接、双向设备到设备连接以及设备到基站连接当中进行选择来确定是否要建立所述设备到设备连接。所述调度信息包括对于所述设备到设备连接唯一的连接标识符(CID)以及用于在所述设备到设备连接上进行通信的至少一个信令参数。所述处理器基于在所述第一设备和所述候选设备之间的某一设备到设备范围来从多个设备当中选择所述至少一个候选设备。所述处理器在建立了所述设备到设备连接之后监测所述设备到设备连接的会话的性能,以便调度所述设备到设备连接上的所述第一设备和所述候选设备之间的随后的通信。当从所述第一设备接收到的请求是与所述第二设备进行通信时,所述候选设备是所述第二设备。所述处理器基于所述至少一个候选设备到所述第一设备的接近度来确定所述至少一个候选设备。所述处理器基于所述候选设备提供由所述第一设备请求的所述内容或服务的可用性来确定所述至少一个候选设备。所述第一设备、所述第二设备以及所述候选设备中的每一个包括在第三代合作伙伴计划(3GPP)长期演进(LTE)网络中运行的用户设备(UE)。
在再一方面,提供一种用于控制包括增强型节点B(eNodeB)的无线通信网络的授权频带上的设备到设备连接的方法,所述方法包括:从第一设备接收与第二设备进行通信的请求;通过所述eNodeB在所述第一设备与所述第二设备之间调度设备发现,所述设备发现的调度包括在设备发现时间段期间,指定所述第一设备或所述第二设备中的一个以传输模式运行并且指定所述第一设备或所述第二设备中的另一个以接收模式运行;从所述第一设备或所述第二设备中的所述另一个接收发现报告,所述发现报告包括关于在所述设备发现时间段期间来自所述第一设备或所述第二设备中的所述一个并且由所述第一设备或所述第二设备中的所述另一个接收的传输的信号质量的信息;并且通过所述eNodeB,根据接收到的发现报告来确定所述第一设备和所述第二设备之间的所述设备到设备连接。
优选地,所述设备到设备连接的确定包括从建立单向设备到设备连接、双向设备到设备连接以及设备到基站连接当中进行选择。所述方法进一步包括:向所述第一设备和所述第二设备中的每一个传输调度信息以便建立所述设备到设备连接。所述调度信息包括用于所述设备到设备连接的连接标识符(CID)以及用于在所述设备到设备连接上进行通信的至少一个信令参数。
在再一方面,提供一种计算机可读介质,包括指令,当由增强型节点B(eNodeB)的处理器执行时,所述指令使所述eNodeB执行操作,所述操作包括:从第一设备接收对于内容或服务的请求;在所述第一设备与至少第二设备之间调度设备发现,所述设备发现的调度包括在设备发现时间段期间,指定所述第一设备或所述第二设备中的一个以传输模式运行并且指定所述第一设备或所述第二设备中的另一个以接收模式运行;从所述第一设备或所述第二设备中的另一个接收发现报告,所述发现报告包括关于在所述设备发现时间段期间来自所述第一设备或所述第二设备中的所述一个并且由所述第一设备或所述第二设备中的所述另一个接收的传输的信号质量的信息;并且根据所接收的发现报告,确定所述第一设备和所述第二设备之间的设备到设备连接。
优选地,所述计算机可读介质进一步包括:至少基于所述第一设备和所述第二设备之间的设备到设备范围而从多个候选设备当中选择所述至少第二设备,其中,所述第一设备和所述第二设备二者彼此位于小区内。所述至少第二设备的选择包括在调度所述设备发现之前,接收在所述第二设备处与所请求的内容或服务的可用性相关的信息。所述设备发现的调度包括指示所述第二设备在所述设备发现时间段期间提供与所述第二设备处的所述内容或服务的可用性相关的信息。所述设备发现的调度包括指示所述第一设备在所述设备发现时间段期间传输与所请求的内容或服务相对应的标识信息。
附图说明
图1说明了根据一些实施例的无线通信网络的示例(部分)。
图2说明了根据一些实施例表示包括在图1的无线通信网络中的基站(和设备)的细节的示例框图。
图3A-3B说明了根据一些实施例用于使能对在授权频带上与相同基站相关联的设备之间的小区内D2D通信的集中控制的示例流程图。
图4A-4B说明了根据一些实施例与图3A-3B的流程图相关的示例时序图。
具体实施方式
提出以下描述以使本领域任何技术人员都能够创造并使用计算机系统配置以及相关的方法和制品以便集中地建立并控制无线通信网络的授权频带上的小区内设备到设备连接。在一个实施例中,第一设备请求与特定的第二设备进行通信。当第一设备和第二设备在彼此的潜在设备到设备范围内时,基站在这样的设备之间调度设备发现。该设备发现对第二设备是可操作的以便侦听第一设备的传输并生成关于来自第一设备的传输的信号质量的报告和/或反之亦然。基站使用该报告以便确定是否要建立设备到设备链路或者建立传统的设备到基站链路(第一设备与基站之间以及第二设备与基站之间)。如果设备到设备链路是首选的,则基站确定针对特定连接的连接标识符以及其它连接参数,这些连接参数被传送到第一和第二设备中的每一个以便在这两个设备之间建立设备到设备链路。
在另一实施例中,第一设备请求某些内容或服务但是并不知道哪个(些)设备提供这样的内容/服务。网络确定能够提供所请求的内容/服务并且在第一设备的潜在D2D范围内的一个或多个候选设备。为每一个候选设备调度设备发现以便侦听第一设备的传输并且生成关于该传输的信号质量的报告和/或反之亦然。来自或关于每一个候选设备的报告用于从候选设备当中选择一个设备并且还用于确定是否建立设备到设备链路或者设备到基站链路。如果期望设备到设备链路,则确定连接标识符以及其它连接参数以便在第一设备与从候选设备当中选定的一个设备之间建立设备到设备链路。
对实施例的各种修改对本领域技术人员来说将是显而易见的,并且本文定义的通用原理可以在不偏离本发明的范围的情况下应用于其它实施例和应用。而且,在以下描述中,许多细节出于说明的目的而被阐述。然而,本领域的普通技术人员会意识到,可以在不使用这些具体细节的情况下来实践本发明的实施例。在其它实例中,公知的结构和过程未以框图形式示出,以便不会使用不必要的细节来混淆对本发明实施例的描述。因而,本公开并不意在局限于所示出的实施例,而是要与本文公开的原理和特征相一致的最广泛范围相符合。
图1说明了根据一些实施例的无线通信网络100的示例(部分)。在一个实施例中,无线通信网络100包含演进型通用地面无线接入网络(EUTRAN),该EUTRAN使用第三代合作伙伴计划(3GPP)长期演进(LTE)标准,以时分复用(TDD)模式或频分复用(FDD)模式运行。在另一实施例中,无线通信网络100包含WiMax网络、码分多址(CDMA)网络、全球移动通信系统(GSM)网络或各种其它授权频带网络。
无线通信网络100包括基站102和多个设备106、108、109。基站102(也被称作BS或增强型节点B(eNodeB或eNB))被配置为服务被标示为小区104的某个地理区域。位于小区104内的多个设备106、108、109由基站102服务。基站102被配置为与多个设备106、108、109中的每一个在第一载波频率上并且可选地在一个或多个第二载波频率上进行通信。为了说明简便,在图1中仅示出单个基站。然而,应当理解,无线通信网络100包括多于一个基站,每一个基站服务一个特定的小区,该特定的小区可能与或者可能不与基站102相邻。
多个设备106、108、109(也被称作用户设备(UE))可以包含被配置为在无线通信网络100内进行通信的各种设备,包括但不局限于移动电话、智能电话、平板计算机、膝上型计算机、台式计算机、个人计算机、服务器、个人数字助理(PDA)、网络设备、机顶盒(STB)、网络路由器、交换机或桥接器等等。多个设备106、108、109包含第一设备106、第二设备108以及第三设备109。设备106、108、109中的一个或多个可以在任意给定时刻移入或移出小区104。比三个设备更多或者更少的设备可以在任意给定时刻由基站102服务。
在一个实施例中,位于小区104内的设备106、108、109使用无线帧向基站102传输数据(上行链路传输)并从基站102接收数据(下行链路传输)。每一个无线帧包含多个上行链路子帧和下行链路子帧,该上行链路子帧和下行链路子帧根据由基站102从所支持的上行链路-下行链路比率配置中选择的上行链路-下行链路比率配置而被配置。在针对3GPPLTE网络的3GPP TS36.211版本9.1.0,E-UTRA Physical Channels and Modulation(版本9),2010年3月中提供了所支持的上行链路-下行链路比率配置的示例集合。
当第一设备106希望与第二设备108进行通信时,传统通信过程如下所示:数据沿着第一传统路径110a被从第一设备106传输到基站102;接下来数据被传送到核心网络用于处理并且被传回到基站102(除非基站102处的本地交换被使能);并且最终,基站102将该数据(经过可能的处理)沿着第二传统路径110b转发到第二设备108。在该通信路径的每一段处的传输速率,例如,对于第一传统路径110a可以是4兆比特每秒(Mbps)而对于第二传统路径110b可以是24Mbps。因而,在通信路径的第一部分上的4Mbps速率限制了从第一设备106经由基站102到第二设备108的整体数据速率。相反,从第二设备108经由基站102到第一设备106的传统通信路径包含第二设备108与基站102之间的第一传统路径112a,以及基站102与第一设备106之间的第二传统路径112b。继续该示例,与第一和第二传统路径112a、112b中的每一条相关联的传输速率能够是24Mbps。
如果第一和第二设备106、108要与彼此直接地进行通信(例如,不需要经由基站102进行数据传递),则可以在第一和第二设备106、108之间定义直接通信路径114。继续该示例,与直接通信路径114相关联的传输速率能够是10Mbps。因而,从第一设备106到第二设备108的数据传输应该在直接通信路径114上(10Mbps)被发送,而不经由基站102(被限制在第一传统路径110a的4Mbps)。然而,与直接通信路径114的速率(10Mbps)相比较,从第二设备108经由基站102到第一设备106的速率(24Mbps)更高。这样,在这一方向上流动的通信应该经由基站102。如下文详细描述的,基于数据速率的优化连同许多因素,无线通信网络100确定最佳数据传输路径。
图2说明了根据一些实施例表示基站102的细节的示例框图。基站102包括处理器202、存储器204、收发机206、指令208以及其它部件(未示出)。处理器202包含一个或多个中央处理单元(CPU)、图形处理单元(GPU)或者上述二者。处理器202被配置为为基站102提供处理和控制功能。存储器204包含一个或多个暂态和静态存储器单元,该存储器单元被配置为为基站102存储指令、数据、设置信息等等。收发机206包含一个或多个收发机,该一个或多个收发机被配置为在设备106、108、109位于基站102的范围内的情况下,接收上行链路传输并且传输下行链路传输。收发机206包括多输入多输出(MIMO)天线以便支持MIMO通信。
指令208包含在计算设备(或机器)上执行的指令或软件的一个或多个集合以便使这样的计算设备(或机器)执行本文讨论的任何方法。在指令208(也被称作计算机或机器可读指令)的执行期间,该指令208可以完全地或至少部分地驻留在处理器202和/或存储器204内。处理器202和存储器204还包含机器可读介质。在一个实施例中,处理器202执行指令208以便使能对授权频带上的由基站102服务的多个设备之间的设备到设备(D2D)通信的集中控制。
上文针对基站102描述的部件中的一个或多个也可以被包括在由基站102服务的多个设备中的每一个中。就所述设备的任意一个执行与由基站102执行的功能或操作相似的功能和操作来说,可以使用与包括在基站102中的硬件、固件和/或软件相似的硬件、固件和/或软件来实现这样的功能和操作。
图3A-3B说明了根据一些实施例用于使能对授权频带上与给定基站相关联的设备之间的小区内D2D通信的集中控制的示例流程图300。图4A-4B说明了根据一些实施例与流程图300相关的示例时序图。下面结合图4A-4B来描述图3A-3B。
如下面详细讨论的,基站(例如,基站102)确定相比于经由基站的传统通信,D2D通信是否是对网络资源的更好的使用。如果D2D通信是优选的(单向或双向),则基站授权并建立安全的D2D连接并且调度成对设备之间的所有D2D通信。按照这种方式,基站管理在D2D链路和设备到基站(D2B)链路上的授权频带资源的重用,并且维持对服务质量(QoS)、干扰、业务负载以及其小区(例如,小区104)内的其它服务参数的控制。
在一个实施例中,图3A和4A示出了第一协议,其中发起设备(例如,第一设备106)和终接设备(例如,第二设备108)在通信请求时对于无线通信网络100已经是已知的。在图3A的块302,基站102从第一设备106(也被称作D1)接收请求以便与特定设备进行通信,该特定设备例如是第二设备108(也被称作D2)(图4A中的通信402)。
响应于接收到的请求,在块304,基站102确定第一和第二设备106、108是否在小区104内并且是否在彼此的D2D范围内。如果第一和第二设备106、108当前具有彼此正在进行的会话,则在预定义的事件发生时,基站102为这些设备调度设备发现时段。该预定义的事件(也被称作网络定义的触发)可以是一个或多个事件。作为示例,该预定义的事件可以是当第二设备108执行到第一设备106与其相关联的相同基站的切换时。如果第一和第二设备106、108当前没有享有彼此已建立的会话,则无线通信网络100(或基站102)在通过传统设施(例如,D2B)链路建立它们的会话之前,自动地或者对预定义的事件的存在做出响应,来检查第一和第二设备106、108是否在彼此的D2D范围内。对D2D范围的充分性的示例检查包括检查第一和第二设备106、108是否都与相同的基站(基站102)相关联,获得关于第一和第二设备106、108中的每一个的地理位置信息(例如,全球定位卫星(GPS)位置)等等。
接下来在块306,一旦满足了用于发起设备发现时段的条件,基站102就调度设备发现资源分配,在该设备发现资源分配期间,第二设备108侦听来自第一设备106的传输(通信404)。虽然这一讨论的剩余部分是基于对设备发现角色的前述划分,但是应当理解,基站102可以很容易地在第二设备108进行传输的同时指派第一设备106进行侦听,或者在发现时段的不同部分期间为两个设备指派不同的角色。基站102也可以指派自组织发现时段,其中设备随机地进行传输和侦听(与WiFi发现相似)。分配结构包括用于第一设备106传输特定消息、特定广告消息、特定导频消息、数据发送回显信息或其它信息(整体地被称为发现消息)的指令,该特定消息包含通常被传输到基站102以便建立连接的数据。分配结构还包括第二设备在资源分配时间段期间进行侦听以及可能要侦听的内容的指令。在某些方面,第一设备106在资源分配期间传输数据,如其通常与基站102进行通信时那样。第一设备106可能并没由意识到它正在必要地传输数据以便被第二设备108收听。
在无线通信网络100例如是3GPP LTE网络的情况下,基站102经由对特定的上行链路-下行链路比率配置的选择来控制其小区104内的数据业务。根据该特定的上行链路-下行链路比率配置,与基站102相关联的设备在每一个各自的时间段都切换到传输模式或接收模式。在所调度的设备发现资源分配期间,第一设备106以传输模式运行(正如其根据该特定的上行链路-下行链路比率配制通常会做的那样),但是设备108被指示在该上行链路时间段的至少一部分内切换到接收模式(与该特定的上行链路-下行链路比率配制相矛盾)。
而且,对于以TDD模式运行的3GPP LTE网络,下行链路和上行链路在相同的频带上执行并且因而单个调度的设备发现足以评估D2D信道质量,与其在上行链路或者下行链路期间被调度无关。对于以FDD模式运行的3GPP LTE网络,下行链路和上行链路使用不同的频率执行。因此,如果D2D链路要在上行链路和下行链路二者期间被调度,则基站102调度至少两个设备发现资源分配,一个用于下行链路频率而另一个用于上行链路频率。
在块308,根据所调度的设备发现资源分配,基站102接收由第一设备106传输的发现消息(通信406)。如果第二设备108在设备发现分配期间成功地接收到(接听到)来自第一设备106的这一发现消息,则第二设备108能够识别信号质量、信道质量、信道信息、以及与来自第一设备106的传输的接收相关的其它特性(整体地被称为设备发现报告)。第二设备108将该设备发现报告发送到基站102(通信408),并且,在块310,基站102相应地接收这样的设备发现报告。
基于从第二设备108接收到的设备发现报告,在块312,基站102确定单向D2D链路、双向D2D链路或者D2B链路(例如,没有D2D链路)是最好的。基站102考虑许多因素,包括但不局限于信道质量、要求的QoS、业务负载、潜在的干扰等等。
D2D连接能够通过以下方式增加网络容量:(1)增加并优化信道重用,(2)提升第一和第二设备106、108之间的传输数据速率,以及(3)减少传输(分段)的数量。所增加的信道重用是因为,与大多数D2B链路相比较,D2D链路在范围方面显著地更短并且更加接近地面。更短的范围可以使能在较低传输功率下更高的数据速率,这是由于不仅传播路径更短,而且阴影和/或干扰通常会更少。到地面的更短距离改善了信号与其它D2D连接以及标准D2B连接的隔离(例如,它们能够以可接受的干扰水平重用相同的频谱)。由于基站控制在D2D链路和D2B链路二者上的调度,因此它能够使用合适的协议(例如,动态基站调度、基于MIMO的干扰管理、叠加编码等等)来优化对重负荷的授权频带的重用。D2D连接还通过在给定的成对设备之间使用一跳路径更换传统的两跳路径(发起设备到基站,经过核心网络,并且接着是基站到终接设备)来减少传输的数量。
如果基站102确定第一和第二设备106、108之间的D2D链路不是优选的(块314的“否”分支),则基站与第一设备106和第二设备108进行通信以便建立标准D2B链路(块316)。否则,基站102已经确定应当建立单向或双向D2D链路(块314的“是”分支),并且基站102确定各种连接参数以便在第一和第二设备106、108之间建立D2D连接(块318)。如果D2D链路是单向的但是第一和第二设备106、108之间的业务是双向的,则基站102也与两个设备建立用于非D2D业务方向的D2B链路。
在块318,基站318确定或配置合适的连接标识符(CID)、安全背景(并且潜在地对设备进行重新认证)、最佳传输功率水平、调制/编码水平以及其它连接参数(整体地被称为D2D连接调度信息或消息),以便建立期望的D2D连接。例如,与要向基站进行传输的设备相比较,要向附近设备进行传输的设备的传输功率水平可以更低。对功率水平的优化降低了干扰风险并且延长了设备的电池寿命。取决于网络标准,基站102可以为每一个期望的D2D业务方向创建不同的CID或者为D2D链路的两个业务方向仅创建单个CID。在单个CID用于D2D链路的两个业务方向的情况下,当调度机制向D2D CID分配带宽时,该调度机制还在给定的时间点上指定哪个设备具有“传输权利”。在块320,这样的D2D连接调度信息被传输(多播)到第一和第二设备106、108中的每一个(通信410)。
接着在块322,基站102从第一和第二设备106、108中的每一个接收D2D连接已经被建立的确认(通信412)。最后,在块324,由于基站102控制并调度在已经建立的D2D链路上第一和第二设备106、108之间的每一个通信,因此基站102接收并监测与D2D链路有关的关于信道质量、QoS、业务负载、干扰信息、链路数据速率、链路性能特性等等的信息,以便设置与来自第一或第二设备106、108的下一个带宽请求相关联的调度参数(例如,最佳功率水平、调制/编码水平、调度资源)。取决于所监测的性能特性,基站102可以决定在必要时将数据业务移回到基础设施路径。
对于与特定的D2D CID相关联的未来带宽请求,基站102使用该D2DCID以便在调度图/消息中指派信道资源。基站102使用关于D2D链路的信道质量、QoS、业务负载和干扰信息来设置优化的功率、调制/编码水平调度资源以便优化网络性能。
在另一实施例中,图3A、3B和4B示出了第二协议,其中发起设备(例如,第一设备106)仅知道它想要的内容或服务但是不知道它想要连接到哪个设备。在块302,基站102从第一设备106接收对于数据内容或服务的请求(图4B的通信420)。图3B示出了块302的子块,其中基站102接收来自第一设备106的对于数据内容或服务的请求(子块330)并且接着确定能够提供所请求的数据内容或服务的潜在设备(子块332)。
在子块332和块304,如果网络100维持(或者能够访问)由其用户的设备提供的数据内容和/或服务的数据库,则网络100(或基站102)确定位于小区104内的哪个设备提供由第一设备106请求的内容/服务。如果网络100(或基站102)具有关于小区104内的设备的更具体的位置信息(例如GPS坐标),则仅那些在第一设备106的潜在D2D范围内并且根据数据库提供由第一设备106请求的内容/服务的设备可以被选择。可选地,网络100(或基站102)可以选择将有资格的设备的组扩展超出由数据库标识的那些设备。在一些实施例中,数据库可以被包括在基站102中,例如被包括在存储器204中(图2)。
如果网络100没有维持(或者能够访问)这样的数据库,则网络100(或基站102)能够至少识别位于第一设备106的D2D范围内的设备(例如,基于与相同基站的相关联性或者基于更具体的位置信息,例如GPS数据),并且接着向这些设备询问它们是否提供所请求的内容/服务。如果基站102计划调度自组织发现时段,则它可以略过该询问,并且代替地请求仅具有所请求的内容/服务的设备从事第一设备106的发现。例如,被标识为与第一设备106的D2D连接的候选以便提供所请求的内容/服务的设备可以是第二设备108和第三设备109(也被称为D3)中的每一个。一个或多个设备可以被标识为候选设备。
接下来在块306,基站102调度设备发现资源分配,第一设备106以及被标识为D2D连接候选的所有设备(例如,第二和第三设备108、109)中的每一个与上面关于第一协议(通信422)讨论的类似。分配结构指示第一设备106传输特定的发现消息,并且指示第二和第三设备108、109中的每一个在第一设备106的传输时间段期间进行侦听。如先前在上文提到的,尽管在这一讨论中第一设备106被指派为传输发现消息而第二和第三设备108、109被指派为侦听发现消息并且向基站102报告结果,但是基站102可以相反地或者也调度第二和第三设备108、109来传输发现消息并且调度第一设备106来侦听该发现消息,或者基站102可以调度自组织发现时段。
在一些实施例中,第一设备106可以进一步被指示以在其发现消息中包括关于所请求的数据内容/服务的信息,以使得在设备发现分配时间段期间成功地接收到该发现消息的设备能够确认它们具有可用的所请求的内容/服务。第一设备106还能够自主地包括这一信息。将关于所请求的数据内容/服务的信息包括在发现消息中是有用的,例如,当不存在为设备的内容/服务提供进行编目的数据库时。如果基站120调度第二和/或第三设备108、109来传输该发现消息,则这些设备中的每一个可以传输它的内容/服务提供。
如果网络100(或基站102)选择将用于D2D连接的候选设备的组扩展超出使用数据库标识的那些设备,则这可以显著地增加候选设备的数量。这样,这些设备可以根据不同的标准(例如,区域、GPS位置、信号强度等等)被分组并且被标识,以便在调度自组织发现时段时减少分配结构中的信令开销。
一旦调度了设备发现,在块308,第一设备106就传输特定的发现消息,并且这样的发现消息由基站102接收,这与上面关于第一协议(通信424)讨论的类似。被调度以参与设备发现并且成功地接收(接听)由第一设备传输的发现消息的候选设备中的每一个向基站102发送设备发现报告。在块308,各自的设备发现报告由基站102接收,这与上面关于第一协议所讨论的类似。继续该示例,基站从第二和第三设备108、109中的每一个接收设备发现报告(通信426)。如果或者当基站102确定它已经从接收到的那些报告中找到了可行的D2D候选时,则基站102可以停止这些报告的传输。设备发现报告包括关于信号质量、信道质量以及来自第一设备106的传输的其它特性的信息。如果该发现消息包括关于所请求的内容/服务的消息,则来自每一个设备的设备发现报告也确认在各自的设备上所请求的内容/服务的可用性。如果基站102代替地调度第二和第三设备108、109来传输发现消息并且调度第一设备106来进行侦听,则第一设备106可以分析/处理该发现信息并且在向基站102发送发现报告之前过滤潜在候选的列表。
接下来在块312,基于接收到的设备发现报告,基站102确定来自候选设备中的哪个设备应该提供所请求的内容/服务以及应该建立何种通信路径以实现内容/服务“下载”(单向D2D链路、双向D2D链路、D2B链路)。应当注意,尽管对内容/服务“下载”的原始请求是从选定的设备到第一设备106,但是基站102为数据业务的双方向确定最佳通信路径,因为第一设备106可以随后对该内容/服务源做出响应。如上面关于第一协议讨论的,基站102考虑从每一个候选设备报告的(或者根据报告确定的)或者关于该每一个候选设备的信道质量、业务负载、QoS等等,以便选择内容/服务源设备和通信路径。
继续该示例,基站102可以选择第三设备109(从第二和第三设备108、109当中)作为内容/服务源,以便满足第一设备的请求。
剩余的块314-324与如上面讨论的同样地被执行,除了关于第一设备106和选定的设备(继续该示例,第三设备109)被执行的块之外。其它方面,在块320,基站102将调度信息传送到第一和第三设备106、109中的每一个(通信428)以便在其间设置或建立D2D连接。作为响应,在块322,基站102从第一和第三设备106、109中的每一个接收D2D连接建立的确认(通信430)。
一旦在给定的设备对之间建立了D2D链路,对于起初就知道请求和终接设备以及对于仅知道请求设备这两种情况,大多数控制信令在基站和给定的设备对之间进行传递。该D2D链路主要用于数据业务。然而,在一些实施例中,某些控制信令可以在给定的设备对之间进行传递而不涉及基站。例如,网络可以确定它对于分组确认、ACK/NACK更加有效地使用网络资源,以便在给定的设备对之间直接进行传递。
因此,本文公开了对授权频带上的小区内D2D连接的集中控制。无线通信网络通过将数据业务明智地移出基础设施网络并且移到设备之间的直接通信链路上来提升网络容量。对D2D链路的这样的使用增加了信道重用、提高了数据速率、并且减少了传输的数量。而且,由于该机制是完全集中的,由网络控制和调度,因此网络运营商维持对D2D链路的监控。因而,网络运营商维持对网络资源和网络性能的控制以及定价/收费权。
术语“机器可读介质”、“计算机可读介质”等等应当被认为包括存储指令的一个或多个集合的单个介质或多个介质(例如,集中式或分布式数据库,和/或相关联的高速缓存和服务器)。术语“机器可读介质”也应当被认为包括任何介质,其能够存储、编码或承载用于由机器执行以使该机器执行本公开的方法中的任意一个或多个的指令。因此,术语“机器可读介质”应当被认为包括但不局限于固态存储器、光学和磁介质、非暂态存储器以及载波信号。
可以意识到,为了清晰的目的,上述说明参照不同的功能单元或处理器描述了一些实施例。然而,显然的是,在不减损本分明的实施例的情况下,可以使用在不同的功能单元、处理器或域之间的任何适合的功能分布。例如,被说明为由单独的处理器或控制器执行的功能可以由相同的处理器或控制器执行。因而,对具体功能单元的引用仅被视为对用于提供所述功能的合适单元的引用,而并不表示严格的逻辑或物理结构或组织。
尽管结合一些实施例描述了本发明,但是并不意在将本发明局限于本文阐述的特定形式。本领域技术人员会认识到,可以根据本发明组合所描述的实施例的各种特征。而且,可以意识到,在不偏离本发明的范围的情况下,本领域技术人员可以进行各种修改和改动。
提供了摘要以便允许读者快速地确定技术性公开的实质。其在这样的理解下被提交:其不会被用于解释或限制权利要求的范围或含义。此外,在上述的具体实施方式中可以看出,各个特征可以被聚集在单个实施例中以便精简本公开。这一公开的方法不应该被理解为反映了这样的意图:所请求保护的实施例要求比在每一个权利要求中明确记载的特征更多的特征。相反,如以下权利要求反映的,发明主题在于少于单个公开的实施例的所有特征。因而,以下权利要求特此被并入到具体实施方式中,其中每一个权利要求本身作为一个独立的实施例。
Claims (24)
1.一种用于控制无线通信网络的授权频带上的设备到设备连接的演进型节点B(eNodeB),所述eNodeB包括:
收发机,用于从第一设备接收通过所述设备到设备连接进行通信的请求或者从所述第一设备接收对于内容或服务的请求;
处理器,与所述收发机进行通信,所述处理器用于在所述第一设备与候选设备之间调度设备发现,并且用于基于由报告设备生成的发现报告来确定是否在所述第一设备与所述候选设备之间建立所述设备到设备连接,其中,所述发现报告包括关于在被调度的设备发现期间来自被报告的设备并且由所述报告设备接收的传输的信号质量的信息,其中,所述报告设备包括所述第一设备或所述候选设备中的一个,并且其中,所述被报告的设备包括所述第一设备或所述候选设备中的另一个,
其中,作为所述发现报告的结果,所述处理器配置为通过在所述第一设备和所述候选设备之间的所述设备到设备连接来建立第一单向通信并且通过使用所述第一设备、所述候选设备和所述eNodeB的设备到基站连接来建立第二单向通信,所述第一单向通信和所述第二单向通信用于相反的业务方向。
2.根据权利要求1所述的eNodeB,其中,所述处理器确定调度信息以便建立所述设备到设备连接,并且其中,所述收发机向所述第一设备与所述候选设备中的每一个传输所述调度信息以便建立所述设备到设备连接。
3.根据权利要求1所述的eNodeB,其中,从所述第一设备接收到的请求是经过所述设备到设备连接与指定的候选设备进行通信的,并且所述指定的候选设备是所述候选设备。
4.根据权利要求1所述的eNodeB,其中,所述处理器基于所述候选设备到所述第一设备的接近度来确定所述候选设备。
5.根据权利要求1所述的eNodeB,其中,所述处理器基于所述候选设备提供由所述第一设备请求的所述内容或服务的可用性来确定所述候选设备。
6.根据权利要求5所述的eNodeB,其中,与所述处理器进行通信的存储器包括关于提供由所述第一设备请求的所述内容或服务的设备的可用性的信息。
7.根据权利要求1所述的eNodeB,其中,所述设备发现包括给所述被报告的设备的第一指令以便在所述被调度的设备发现期间传输特定消息,以及给所述报告设备的第二指令以便在所述被调度的设备发现期间以接收模式运行。
8.根据权利要求7所述的eNodeB,其中,所述设备发现包括给所述被报告的设备的第三指令以便传输关于所请求的所述内容或服务的信息,以及给所述报告设备的第四指令以便当从所述第一设备接收到的所述请求是针对所述内容或服务时,确认所述内容或服务的可用性,并且其中,所述被报告的设备包括所述第一设备,并且所述报告设备包括所述候选设备。
9.根据权利要求7所述的eNodeB,其中,所述设备发现包括给所述被报告的设备的第三指令以便当从所述第一设备接收到的所述请求是针对所述内容或服务时,将由所述被报告的设备提供的内容或服务包括在所述特定消息中,并且其中,所述被报告的设备包括所述候选设备,并且所述报告设备包括所述第一设备。
10.根据权利要求7所述的eNodeB,其中,所述收发机在没有来自所述eNodeB的指令的情况下自动地从所述候选设备接收关于所述内容或服务的可用性信息。
11.根据权利要求1到10中的任意一项所述的eNodeB,其中,所述无线通信网络包括第三代合作伙伴计划(3GPP)长期演进(LTE)网络。
12.一种用于控制包括演进型节点B(eNodeB)的无线通信网络的授权频带上的设备到设备连接的系统,包括:
第一设备和第二设备,所述第一设备和所述第二设备包括在第三代合作伙伴计划(3GPP)长期演进(LTE)网络中运行的用户设备(UE);以及
在所述LTE网络中运行的演进型节点B(eNodeB),所述eNodeB包括被配置用于从所述第一设备接收通过设备到设备连接进行通信的请求或者从所述第一设备接收对于内容或服务的请求的收发机,所述eNodeB进一步包括与所述收发机进行通信的处理器,
其中,所述处理器被配置为在所述第一设备与候选设备之间调度设备发现,并且用于基于由报告设备生成的发现报告来确定是否要在所述第一设备与所述候选设备之间建立设备到设备连接,其中,所述发现报告包括关于在被调度的设备发现期间由所述报告设备接收的来自被报告的设备的传输信号质量的信息,其中,所述报告设备包括所述第一设备或所述候选设备中的一个,并且所述被报告的设备包括所述第一设备和所述候选设备中的另一个,并且其中,所述第一设备和所述候选设备二者都位于由所述eNodeB服务的小区内,
其中,作为所述发现报告的结果,所述处理器配置为通过在所述第一设备和所述候选设备之间的所述设备到设备连接来建立第一单向通信并且通过使用所述第一设备、所述候选设备和所述eNodeB的设备到基站连接来建立第二单向通信,所述第一单向通信和所述第二单向通信用于相反的业务方向。
13.根据权利要求12所述的系统,其中,所述发现报告包括关于在所述被调度的设备发现期间来自所述被报告的设备并且由所述报告设备接收的传输的信号质量的信息。
14.根据权利要求12所述的系统,其中,所述处理器确定调度信息以便建立所述设备到设备连接,并且所述调度信息包括对于所述设备到设备连接唯一的连接标识符(CID)以及用于在所述设备到设备连接上进行通信的至少一个信令参数。
15.根据权利要求12所述的系统,其中,所述处理器基于在所述第一设备和所述候选设备之间的某一设备到设备范围来从多个设备当中选择所述候选设备。
16.根据权利要求12所述的系统,其中,所述处理器在建立了所述设备到设备连接之后监测所述设备到设备连接的会话的性能,以便调度所述设备到设备连接上的所述第一设备和所述候选设备之间的随后的通信。
17.根据权利要求12所述的系统,其中,从所述第一设备接收到的请求是通过所述设备到设备连接与指定的候选设备进行通信,并且所述指定的候选设备是所述候选设备。
18.根据权利要求12到17中的任意一项所述的系统,其中,所述处理器基于所述候选设备到所述第一设备的接近度,或者基于所述候选设备提供由所述第一设备请求的所述内容或服务的可用性来确定所述候选设备。
19.一种用于控制包括演进型节点B(eNodeB)的无线通信网络的授权频带上的设备到设备连接的方法,所述方法包括:
从第一设备接收与第二设备进行通信的请求;
通过所述eNodeB在所述第一设备与所述第二设备之间调度设备发现,所述设备发现的调度包括在设备发现时间段期间,指定被报告的设备以传输模式运行并且指定报告设备以接收模式运行,其中,所述报告设备包括所述第一设备或所述第二设备中的一个,并且其中,所述被报告的设备包括所述第一设备或所述第二设备中的另一个;
从所述报告设备接收发现报告,所述发现报告包括关于在所述设备发现时间段期间来自所述被报告的设备并且由所述报告设备接收的传输的信号质量的信息;并且
通过所述eNodeB,根据接收到的发现报告来建立通过在所述第一设备和所述第二设备之间的所述设备到设备连接的第一单向通信,并且通过所述eNodeB,建立通过使用所述第一设备、所述第二设备和所述eNodeB的设备到基站连接的第二单向通信,所述第一单向通信和所述第二单向通信用于相反的业务方向。
20.根据权利要求19所述的方法,进一步包括:向所述第一设备和所述第二设备中的每一个传输调度信息以便建立所述设备到设备连接。
21.根据权利要求20所述的方法,其中,所述调度信息包括用于所述设备到设备连接的连接标识符(CID)以及用于在所述设备到设备连接上进行通信的至少一个信令参数。
22.至少一种计算机可读介质,包括用于计算设备的操作的指令,当由机器执行时,所述指令使所述机器执行根据权利要求19-21的方法中的任意一种所述的操作。
23.一种用于控制包括演进型节点B(eNodeB)的无线通信网络的授权频带上的设备到设备连接的装置,包括用于执行根据权利要求19-21所述的方法中的任意一种的模块。
24.一种用于控制包括演进型节点B(eNodeB)的无线通信网络的授权频带上的设备到设备连接的装置,包括:
存储器,其上存储有指令;以及
处理器,其耦合到所述存储器,所述指令由所述处理器执行以使得所述处理器执行根据权利要求19-21所述的方法中的任意一种。
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