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。