Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/6360
標題: 聲音與資料在無線通訊網路之整合傳輸
Integrated Voice and Data Transmission over Wireless Communication Networks
作者: 彭經能
Peng, Ching-Nen
關鍵字: TDMA;分時多工;Markov chain;Multi-media;馬可夫鏈;多媒体
出版社: 電機工程學系
摘要: 
我們考慮聲音與資料在無線通訊網路上之整合傳輸.無線網路包含一個
基地台和一些藉由基地台來達到彼此通訊的行動終端機.上載的通道被分
割為兩個分開的通道,分別使用於攜帶聲音傳送之流量和資料傳送之流量,
聲音通道為分時多工(TMDA)型態,而資料通道使用CSMA/CA之競爭式通訊協
定.下載通道為單一之廣播式通道.所有的聲音和資料之封包均為固定的大
小.既然有兩種不同型態的交通流量,自然而然的將會有競爭在基地站發
生,而聲音之傳送流量被賦予高於資料傳送的優先權.因此,在無線網路中
資料流量的效能是一個需要被研讀和了解的重要議題.我們藉由具有兩種
優先類別之流量的離散排隊網路模型來研究此議題.兩種不同類別之流量
到達基地站的程序,分別以用CSMA和TDMA上載到通道的輸出程序來模擬,繼
而以兩維的碼可夫鏈來近似離散排隊網路模型的行為.基於此種方法,我們
可以算出傳送流量封包丟掉的機率和平均排隊長度,此些分析結果並經由
系統模擬所確認.獲致的結果將會對於設計多媒體無線網路之效能提供了
有用的資訊.

We consider integrated voice and data transmission over a
wireless communication Network. The wireless network of interest
consists of a base station and a number of mobile terminals
which communicate with each other via the base station. The
uplink channel is divided into two separate channels used for
carrying voice and data traffic, respectively,in that the voice
channel is assumed to be of TDMA type and the data channel uses
the contention ptotocol of CSMA/CA. The downlink channel is a
single broadcast channel. All the voice and data packets are
assumed to be of a fixed size. Since there are two type of
traffic which will compete at thebase station for the downlink
channel, contention naturally occurs. Here, voice packets are
always assumed to have higher priority over data packets.The
performance of data traffic in the wireless network is an
important issue that require to be studied and understood. This
is done by modeling the system as a discrete-time queueing
network having two priority classes of traffic.The arrival
processed of the two classes of traffic are modeled via the
output processes of their corresponding uplink channels(i.e.,
CSMA/CA and TDMA).A two-dimensional Markov chain is then used to
approximate the behavior of the discrete-time queueing network
model, based on which analytical results such as packet drop
probability and average queue length are obtained, which are
validated via simulations. The obtained results provide useful
information for the performance and design of multi-media
wireless communication networks.
URI: http://hdl.handle.net/11455/6360
Appears in Collections:電機工程學系所

Show full item record
 

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.