Based on the studies of gprs streaming service model , radio access network communication protocol and qos related specification of 3gpp , we discussed the scheme of streaming traffic in ( e ) gprs radio access network , including mainly qos management module such as access control , flow control and scheduling 通过对3gpp中gprs流业务服务模型、无线子网络的通信协议以及qos相关规范的研究,讨论了具体流式数据业务传输在( e ) gprs无线接入网络中实现方案,包括接入控制、调度控制和流量控制等主要qos管理控制功能模块。
The content of this article is the research on the protocols for wireless communications on the media access control ( mac ) layer , which is a sublayer of the link layer , one of the five layers ( the physics layer , the link layer , the network layer , the transmission layer and the application layer ) which construct the stack of protocols for wireless communications . the emphasis of the research is on the applicability and superiority of two protocols on the mac layer 本文的研究内容是mac ( mediaaccesscontrol )层? ?无线传输的五层协议栈结构(物理层、链路层、网络层、传输层、应用层)中数据链路层的媒体接入控制子层? ?无线通信协议,重点研究两种协议在传感器网络应用中的适用性和优越性。
In addition , service differentiation can be achieved among flows with different qos requirements and thus the qos for medium access control in mobile ad hoc network is improved . finally , the thesis concludes by summarizing the main contributions of the research and by presenting directions for future work 同时，对于不同服务等级要求的业务，也能根据其服务等级享有不同的争用信道的优先级，实现对不同服务等级要求业务的区分服务，从而提高了移动adhoc网络信道接入控制的服务质量。
Therefore , the constraint olsr routing protocol is needed . and also , the paper adds the constraint olsr to swan , a simple but available qos model . the swan has two important measures to realize the qos service , one is rate _ controller for best - effort traffic , the other is admission _ controller for real - time traffic 在此基础上本文结合了移动adhoc网络的一种简单的qos模型? ? swan模型,采用了该模型对实时业务的接入控制机制和对尽力而为业务的速率控制机制,以实现在该网络中提供qos服务。
The medium access control ( mac ) layer protocol of the airlink interface between the mobile data base station ( mdbs ) and mobile end systems ( m - ess ) in cellular digital packet data ( cdpd ) is studied firstly . the access method of slotted non - persistent digital sense multiple access with collision detection ( dsma / cd ) is described mainly 本文首先研究了蜂窝数字分组数据( cdpd )空中接口中的介质接入控制层( mac )协议，详细论述了基于时隙的非坚持的、带冲突检测的数字载波侦听多址接入协议( dsma cd ) 。
By theory analysis and computer simulation , dual control write sequence read medium access control protocol ( d - mac ) we bring forward works better than typical global fifo mac protocol . in order to let residential and small business customers enjoy all kinds of services that backbone network provides economically as early as possible , we design a switch hub 经过理论分析和计算机仿真，可以证明我们提出的双控制写入顺序读出媒质接入控制协议( d - mac )是一个非常有效的，比典型的globalfifomac协议具有更小的传输时延和信元时延抖动。
Indoor wireless optical local area network ( wlan ) has advantages of wide bandwidth , strong anti - jamming and good handiness . it is the best resolution for future communications : mobility , personality , and multimedia application , and will have wide applying foreground . how to use the network bandwidth resource fairly and effectively is key to qos guarantee 在室内无线光信道中,如何公平、高效地利用网络带宽是保障局域网通信可用性、可靠性和服务质量的关键所在,也正是无线光局域网媒质接入控制( mediumaccesscontrol , mac )协议需要解决的核心问题。
