公开(公告)号：US08879573B2

公开(公告)日：2014-11-04

申请号：US11847034

申请日：2007-08-29

申请人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Gopala Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan

发明人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Gopala Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan

IPC分类号： H04L12/413 ,  H04W16/14 ,  H04L12/26

CPC分类号： H04L12/2602 ,  H04L43/00 ,  H04L43/0882 ,  H04L43/16 ,  H04W16/14

摘要： A new media access control (MAC) protocol for cognitive wireless networks is described. The new MAC protocol allows each of multiple nodes, such as cell phones and computers with wireless, to determine utilization of a communication spectrum, such as the television broadcast band. The nodes collaborate to achieve a combined view of spectrum utilization in their local vicinity, in which scheduled users and empty time segments are mapped across a wide range of frequencies. Nodes negotiate with each other to reserve idle segments of the spectrum for packet exchange on negotiated frequencies. Control packet structure allows nodes to become prescient of the local spectrum utilization during handshaking. A cognitive device operating under the new MAC has a first radio that both scans the spectrum and monitors a control channel; and a second reconfigurable radio with adjustable parameters, including frequency and bandwidth, for packet transmission.

摘要翻译： 描述了用于认知无线网络的新的媒体接入控制（MAC）协议。 新的MAC协议允许诸如蜂窝电话和具有无线的计算机的多个节点中的每一个确定诸如电视广播频带之类的通信频谱的利用。 节点协作实现其本地附近的频谱利用的组合视图，其中调度的用户和空时间段在广泛的频率范围内被映射。 节点相互协商以在协商的频率上保留用于分组交换的频谱的空闲段。 控制分组结构允许节点在握手期间变得预先考虑本地频谱利用。 在新MAC下操作的认知设备具有扫描频谱并监视控制信道的第一无线电; 以及用于分组传输的具有可调参数（包括频率和带宽）的第二可重新配置的无线电。

公开(公告)号：US07876786B2

公开(公告)日：2011-01-25

申请号：US12061577

申请日：2008-04-02

申请人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Gopala Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan

发明人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Gopala Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan

IPC分类号： H04J4/00

CPC分类号： H04W72/0446 ,  H04L5/0023 ,  H04L5/0032 ,  H04L5/0039 ,  H04L5/0066 ,  H04L5/0094 ,  H04W16/14

摘要： Dynamic time-spectrum block allocation for cognitive radio networks is described. In one implementation, without need for a central controller, peer wireless nodes collaboratively sense local utilization of a communication spectrum and collaboratively share white spaces for communication links between the nodes. Sharing local views of the spectrum utilization with each other allows the nodes to dynamically allocate non-overlapping time-frequency blocks to the communication links between the nodes for efficiently utilizing the white spaces. The blocks are sized to optimally pack the available white spaces. The nodes regularly readjust the bandwidth and other parameters of all reserved blocks in response to demand, so that packing of the blocks in available white spaces maintains a fair distribution of the overall bandwidth of the white spaces among active communication links, minimizes finishing time of all communications, reduces contention overhead among the nodes contending for the white spaces, and maintains non-overlapping blocks.

摘要翻译： 描述了认知无线电网络的动态时频块分配。 在一个实现中，不需要中央控制器，对等无线节点协同地感知通信频谱的本地利用，并且协作地共享用于节点之间的通信链路的空白空间。 共享频谱利用率的局部视图允许节点动态地将不重叠的时间频率块分配给节点之间的通信链路，以有效地利用白色空间。 这些块的大小可以最佳地打包可用的空白空间。 节点响应于需求定期重新调整所有保留块的带宽和其他参数，使得可用空白块中的块的打包保持主动通信链路之间白色空间的总带宽的公平分配，最小化所有的完成时间 通信，减少竞争白空间的节点之间的争用开销，并维护不重叠的块。

公开(公告)号：US20080130519A1

公开(公告)日：2008-06-05

申请号：US11847034

申请日：2007-08-29

申请人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Gopala Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan

发明人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Gopala Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan

IPC分类号： H04L12/24 ,  H04Q7/00

CPC分类号： H04L12/2602 ,  H04L43/00 ,  H04L43/0882 ,  H04L43/16 ,  H04W16/14

摘要： A new media access control (MAC) protocol for cognitive wireless networks is described. The new MAC protocol allows each of multiple nodes, such as cell phones and computers with wireless, to determine utilization of a communication spectrum, such as the television broadcast band. The nodes collaborate to achieve a combined view of spectrum utilization in their local vicinity, in which scheduled users and empty time segments are mapped across a wide range of frequencies. Nodes negotiate with each other to reserve idle segments of the spectrum for packet exchange on negotiated frequencies. Control packet structure allows nodes to become prescient of the local spectrum utilization during handshaking. A cognitive device operating under the new MAC has a first radio that both scans the spectrum and monitors a control channel; and a second reconfigurable radio with adjustable parameters, including frequency and bandwidth, for packet transmission.

摘要翻译： 描述了用于认知无线网络的新的媒体接入控制（MAC）协议。 新的MAC协议允许诸如蜂窝电话和具有无线的计算机的多个节点中的每一个确定诸如电视广播频带之类的通信频谱的利用。 节点协作实现其本地附近的频谱利用的组合视图，其中调度的用户和空时间段在广泛的频率范围内被映射。 节点相互协商以在协商的频率上保留用于分组交换的频谱的空闲段。 控制分组结构允许节点在握手期间变得预先考虑本地频谱利用。 在新MAC下操作的认知设备具有扫描频谱并监视控制信道的第一无线电; 以及用于分组传输的具有可调参数（包括频率和带宽）的第二可重新配置的无线电。

公开(公告)号：US08488633B2

公开(公告)日：2013-07-16

申请号：US12906837

申请日：2010-10-18

申请人： Paramvir Bahl ,  Thomas Moscibroda ,  Gopala Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan ,  Ranveer Chandra

发明人： Paramvir Bahl ,  Thomas Moscibroda ,  Gopala Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan ,  Ranveer Chandra

IPC分类号： H04J4/00

CPC分类号： H04W72/0446 ,  H04L5/0023 ,  H04L5/0032 ,  H04L5/0039 ,  H04L5/0066 ,  H04L5/0094 ,  H04W16/14

摘要： Dynamic time-spectrum block allocation for cognitive radio networks is described. In one implementation, without need for a central controller, peer wireless nodes collaboratively sense local utilization of a communication spectrum and collaboratively share white spaces for communication links between the nodes. Sharing local views of the spectrum utilization with each other allows the nodes to dynamically allocate non-overlapping time-frequency blocks to the communication links between the nodes for efficiently utilizing the white spaces. The blocks are sized to optimally pack the available white spaces. The nodes regularly readjust the bandwidth and other parameters of all reserved blocks in response to demand, so that packing of the blocks in available white spaces maintains a fair distribution of the overall bandwidth of the white spaces among active communication links, minimizes finishing time of all communications, reduces contention overhead among the nodes contending for the white spaces, and maintains non-overlapping blocks.

摘要翻译： 描述了认知无线电网络的动态时频块分配。 在一个实现中，不需要中央控制器，对等无线节点协同地感知通信频谱的本地利用，并且协作地共享用于节点之间的通信链路的空白空间。 共享频谱利用率的局部视图允许节点动态地将不重叠的时间频率块分配给节点之间的通信链路，以有效地利用白色空间。 这些块的大小可以最佳地打包可用的空白空间。 节点响应于需求定期重新调整所有保留块的带宽和其他参数，使得可用空白块中的块的打包保持主动通信链路之间白色空间的总带宽的公平分配，最小化所有的完成时间 通信，减少竞争白空间的节点之间的争用开销，并维护不重叠的块。

公开(公告)号：US20110032892A1

公开(公告)日：2011-02-10

申请号：US12906837

申请日：2010-10-18

申请人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Gopala Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan

发明人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Gopala Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan

IPC分类号： H04W72/04

CPC分类号： H04W72/0446 ,  H04L5/0023 ,  H04L5/0032 ,  H04L5/0039 ,  H04L5/0066 ,  H04L5/0094 ,  H04W16/14

摘要： Dynamic time-spectrum block allocation for cognitive radio networks is described. In one implementation, without need for a central controller, peer wireless nodes collaboratively sense local utilization of a communication spectrum and collaboratively share white spaces for communication links between the nodes. Sharing local views of the spectrum utilization with each other allows the nodes to dynamically allocate non-overlapping time-frequency blocks to the communication links between the nodes for efficiently utilizing the white spaces. The blocks are sized to optimally pack the available white spaces. The nodes regularly readjust the bandwidth and other parameters of all reserved blocks in response to demand, so that packing of the blocks in available white spaces maintains a fair distribution of the overall bandwidth of the white spaces among active communication links, minimizes finishing time of all communications, reduces contention overhead among the nodes contending for the white spaces, and maintains non-overlapping blocks.

摘要翻译： 描述了认知无线电网络的动态时频块分配。 在一个实现中，不需要中央控制器，对等无线节点协同地感知通信频谱的本地利用，并且协作地共享用于节点之间的通信链路的空白空间。 共享频谱利用率的局部视图允许节点动态地将不重叠的时间频率块分配给节点之间的通信链路，以有效地利用白色空间。 这些块的大小可以最佳地打包可用的空白空间。 节点响应于需求定期重新调整所有保留块的带宽和其他参数，使得可用空白块中的块的打包保持主动通信链路之间白色空间的总带宽的公平分配，最小化所有的完成时间 通信，减少竞争白空间的节点之间的争用开销，并维护不重叠的块。

公开(公告)号：US20090196180A1

公开(公告)日：2009-08-06

申请号：US12061577

申请日：2008-04-02

申请人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Gopala Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan

发明人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Gopala Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan

IPC分类号： H04L12/26 ,  H04W4/00 ,  H04J1/16

CPC分类号： H04W72/0446 ,  H04L5/0023 ,  H04L5/0032 ,  H04L5/0039 ,  H04L5/0066 ,  H04L5/0094 ,  H04W16/14

摘要： Dynamic time-spectrum block allocation for cognitive radio networks is described. In one implementation, without need for a central controller, peer wireless nodes collaboratively sense local utilization of a communication spectrum and collaboratively share white spaces for communication links between the nodes. Sharing local views of the spectrum utilization with each other allows the nodes to dynamically allocate non-overlapping time-frequency blocks to the communication links between the nodes for efficiently utilizing the white spaces. The blocks are sized to optimally pack the available white spaces. The nodes regularly readjust the bandwidth and other parameters of all reserved blocks in response to demand, so that packing of the blocks in available white spaces maintains a fair distribution of the overall bandwidth of the white spaces among active communication links, minimizes finishing time of all communications, reduces contention overhead among the nodes contending for the white spaces, and maintains non-overlapping blocks.

摘要翻译： 描述了认知无线电网络的动态时频块分配。 在一个实现中，不需要中央控制器，对等无线节点协同地感知通信频谱的本地利用，并且协作地共享用于节点之间的通信链路的空白空间。 共享频谱利用率的局部视图允许节点动态地将不重叠的时间频率块分配给节点之间的通信链路，以有效地利用白色空间。 这些块的大小可以最佳地打包可用的空白空间。 节点响应于需求定期重新调整所有保留块的带宽和其他参数，使得可用空白块中的块的打包保持主动通信链路之间白色空间的总带宽的公平分配，最小化所有的完成时间 通信，减少竞争白空间的节点之间的争用开销，并维护不重叠的块。

公开(公告)号：US20090034457A1

公开(公告)日：2009-02-05

申请号：US11832624

申请日：2007-08-01

申请人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Gopala Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan

发明人： Paramvir Bahl ,  Ranveer Chandra ,  Thomas Moscibroda ,  Gopala Sri Hari Narlanka ,  Yunnan Wu ,  Yuan Yuan

IPC分类号： H04Q7/00

CPC分类号： H04W16/10 ,  H04W28/16

摘要： Techniques for enhancing throughput capacity and/or bandwidth distribution fairness among APs in a wireless network are described. Specifically, a channel frequency profile which includes a center frequency and channel-width (i.e., channel bandwidth) is dynamically assigned to each of one or more APs in a wireless network. The assigned channel frequency profile for each AP is based, at least in part, on the current composition of the wireless network including, its topology and traffic load distribution. In this regard, each AP's channel frequency profile can be continuously or periodically changed such that the entire available frequency spectrum is effectively utilized and/or interference between APs is avoided or limited. This, in turn, enhances the throughput capacity and/or bandwidth distribution fairness of the wireless network.

摘要翻译： 描述了用于在无线网络中的AP之间增强吞吐量容量和/或带宽分配公平性的技术。 具体地，包括中心频率和信道宽度（即，信道带宽）的信道频率分布被动态分配给无线网络中的一个或多个AP的每一个。 每个AP的分配的信道频率分布至少部分地基于无线网络的当前组成，包括其拓扑和业务负载分布。 在这方面，可以连续地或周期性地改变每个AP的信道频率分布，使得有效利用整个可用频谱和/或避免或限制AP之间的干扰。 这又增强了无线网络的吞吐能力和/或带宽分配公平性。