公开(公告)号：US20170019922A1

公开(公告)日：2017-01-19

申请号：US15153748

申请日：2016-05-13

Applicant: Macau University of Science and Technology

Inventor： Qinglin ZHAO ,  Fangxin XU ,  Yu ZENG ,  Jie YANG

IPC: H04W74/08 ,  H04W74/00 ,  H04W72/14

CPC classification number: H04W74/0866 ,  H04W74/008 ,  H04W74/02 ,  H04W74/08 ,  H04W74/0816

Abstract: A MAC protocol, useful for WLANs, is provided for random access over a channel. The protocol includes three concurrent processes. The channel includes a contention subchannel and a transmission subchannel. In the contention process, all nodes use the standard RTS/CTS mechanism operated on the contention subchannel to contend for a transmission right. When one node gains the right, all the nodes store the contention result into their respective contention queue (CQ) buffers. In the transmission process, the nodes sequentially transmit their data over the transmission subchannel according to the order of the nodes stored in the CQ buffers. When one node finishes transmission, the CQ buffers are updated. The contention and transmission processes are connected by the queuing process for dynamically updating each node's CQ buffer. When OFDM is used in a random-access system, numbers of data subcarriers in both subchannels for maximizing the system throughput are given.

Abstract translation: 提供对WLAN有用的MAC协议，用于通过信道进行随机访问。 协议包括三个并发进程。 信道包括争用子信道和传输子信道。 在争用过程中，所有节点都使用在争用子信道上运行的标准RTS / CTS机制来争取发送权。 当一个节点获得权限时，所有节点将争用结果存储到它们各自的争用队列（CQ）缓冲器中。 在传输过程中，节点根据存储在CQ缓冲器中的节点的顺序，依次通过传输子信道发送它们的数据。 当一个节点完成传输时，更新CQ缓冲区。 争用和传输过程通过排队过程连接，动态更新每个节点的CQ缓冲区。 当在随机接入系统中使用OFDM时，给出用于最大化系统吞吐量的两个子信道中的数据子载波的数目。

公开(公告)号：US20170026964A1

公开(公告)日：2017-01-26

申请号：US15219293

申请日：2016-07-26

Applicant: Macau University of Science and Technology

Inventor： Qinglin ZHAO ,  Caihong KAI ,  Hanxu ZHENG

IPC: H04W72/04 ,  H04W4/00 ,  H04W52/02 ,  H04W72/00 ,  H04W72/12 ,  H04J3/16

CPC classification number: H04W52/0219 ,  H04B17/3912 ,  H04W4/70 ,  Y02D70/00 ,  Y02D70/22

Abstract: The throughput of a wireless network can be boosted by network coding (NC). The present invention combines NC-aware routing and TDMA-based MAC protocol for energy-efficient design in the wireless network, and provides a method thereof. An optimization model, which is a minimum energy consumption model (MECM), is formulated for minimizing the energy consumption for accomplishing a set of flow transmissions. In particular, based on a set of user traffic-flow demands, a NC-aware traffic-flow assignment that minimizes a total energy consumption of packets delivering to meet the user traffic-flow demands is determined. Thereafter, given the optimal flow assignment, a minimum timeslots model (MTM) which leads to a TDMA-based scheduling strategy at the MAC layer is developed. The MTM is to minimize the total number of timeslots required for transmission under a condition that the NC-aware traffic-flow assignment as already determined is accomplishable.

Abstract translation: 无线网络的吞吐量可以通过网络编码（NC）来提升。 本发明将无线网络中的基于NC感知路由和基于TDMA的MAC协议结合在节能设计中，并提供了其方法。 制定了最小化能量消耗模型（MECM）的优化模型，用于最小化能量消耗以实现一组流量传输。 特别地，基于一组用户业务流量需求，确定最小化分组传送以满足用户业务流量需求的总能量消耗的NC感知业务流分配。 此后，给定最佳流分配，开发了在MAC层导致基于TDMA的调度策略的最小时隙模型（MTM）。 在已经确定的NC感知业务流分配是可实现的条件下，MTM将使传输所需的时隙的总数最小化。

公开(公告)号：US20170026913A1

公开(公告)日：2017-01-26

申请号：US15219291

申请日：2016-07-26

Applicant: Macau University of Science and Technology

Inventor： Qinglin ZHAO ,  Yuan Wu ,  Yanfei He ,  Jiachao Chen ,  Liping Qian

IPC: H04W52/24 ,  H04W52/52 ,  H04W52/26

CPC classification number: H04W52/243 ,  H04W52/267 ,  H04W52/52

Abstract: The present invention provides a method of power control for a plurality of secondary users (SUs), or unlicensed users, in a cognitive radio network having a plurality of primary users (PUs), or licensed users. The method comprises determining an optimal power level for each of the SUs such that a total throughput of all the SUs is maximized while satisfying an individual throughput requirement of each SU and an interference limit constraint of the PUs. In particular, a case having two SUs is considered.

Abstract translation: 本发明提供了一种在具有多个主用户（PU）或许可用户的认知无线电网络中的多个次要用户（SU）或非许可用户的功率控制的方法。 该方法包括确定每个SU的最佳功率电平，使得所有SU的总吞吐量最大化，同时满足每个SU的单个吞吐量要求和PU的干扰限制约束。 特别地，考虑具有两个SU的情况。