An Effect of Packet Recovery Mechanism on Buffer Size Requirements for Mobile VoIP Handoff
碩士 === 逢甲大學 === 資訊工程所 === 95 === The integration of Mobile IP standard and VoIP functions makes the Mobile Voice over IP (Mobile VoIP) service feasible. In Mobile VoIP applications, the mobile users can dynamically move around different networks, and thus result in handoffs. Handoff events will inte...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Others |
Language: | en_US |
Published: |
2007
|
Online Access: | http://ndltd.ncl.edu.tw/handle/08834228432194165825 |
id |
ndltd-TW-095FCU05392089 |
---|---|
record_format |
oai_dc |
spelling |
ndltd-TW-095FCU053920892015-10-13T11:31:56Z http://ndltd.ncl.edu.tw/handle/08834228432194165825 An Effect of Packet Recovery Mechanism on Buffer Size Requirements for Mobile VoIP Handoff 行動式網路電話換手階段封包回復機制對緩衝區需求影響之探討 Yu-Cheng Xiao 蕭有程 碩士 逢甲大學 資訊工程所 95 The integration of Mobile IP standard and VoIP functions makes the Mobile Voice over IP (Mobile VoIP) service feasible. In Mobile VoIP applications, the mobile users can dynamically move around different networks, and thus result in handoffs. Handoff events will interrupt the communication, and thus introduce packet lost temporarily. Specially, the quality of service (QoS) with communications will be significantly affected. As a consequence, it is very critical to improving the communication QoS caused by the handoff. In this thesis, we propose a packet recovery mechanism against handoff issue, and analyze its hardware requirements on user’s, mobile node, for providing the reference of performance improvements and designing considerations. We first integrate Mobile IP standard with SIP-based VoIP service to formulate our experimental platform. In order to avoid packet loss and thus improve the communication QoS, we propose a two-buffer packet retransmission recovery scheme. Furthermore, for realizing the effects of handoff time on backup buffer overhead, several realistic experiments with various wireless parameters, such as different access point signaling strengths, different traffic loads, and different advertisement frequencies, were conducted. Experimental results show that, with our packet recovery scheme, the size of extra designated backup buffer of mobile node in general ranges from 7 to 10 Kilo bytes. We thus conclude that our proposed two-buffer recovery scheme is practical for current Mobile VoIP services. Jyh-Ming Huang 黃志銘 2007 學位論文 ; thesis 51 en_US |
collection |
NDLTD |
language |
en_US |
format |
Others
|
sources |
NDLTD |
description |
碩士 === 逢甲大學 === 資訊工程所 === 95 === The integration of Mobile IP standard and VoIP functions makes the Mobile Voice over IP (Mobile VoIP) service feasible. In Mobile VoIP applications, the mobile users can dynamically move around different networks, and thus result in handoffs. Handoff events will interrupt the communication, and thus introduce packet lost temporarily. Specially, the quality of service (QoS) with communications will be significantly affected. As a consequence, it is very critical to improving the communication QoS caused by the handoff. In this thesis, we propose a packet recovery mechanism against handoff issue, and analyze its hardware requirements on user’s, mobile node, for providing the reference of performance improvements and designing considerations. We first integrate Mobile IP standard with SIP-based VoIP service to formulate our experimental platform. In order to avoid packet loss and thus improve the communication QoS, we propose a two-buffer packet retransmission recovery scheme. Furthermore, for realizing the effects of handoff time on backup buffer overhead, several realistic experiments with various wireless parameters, such as different access point signaling strengths, different traffic loads, and different advertisement frequencies, were conducted. Experimental results show that, with our packet recovery scheme, the size of extra designated backup buffer of mobile node in general ranges from 7 to 10 Kilo bytes. We thus conclude that our proposed two-buffer recovery scheme is practical for current Mobile VoIP services.
|
author2 |
Jyh-Ming Huang |
author_facet |
Jyh-Ming Huang Yu-Cheng Xiao 蕭有程 |
author |
Yu-Cheng Xiao 蕭有程 |
spellingShingle |
Yu-Cheng Xiao 蕭有程 An Effect of Packet Recovery Mechanism on Buffer Size Requirements for Mobile VoIP Handoff |
author_sort |
Yu-Cheng Xiao |
title |
An Effect of Packet Recovery Mechanism on Buffer Size Requirements for Mobile VoIP Handoff |
title_short |
An Effect of Packet Recovery Mechanism on Buffer Size Requirements for Mobile VoIP Handoff |
title_full |
An Effect of Packet Recovery Mechanism on Buffer Size Requirements for Mobile VoIP Handoff |
title_fullStr |
An Effect of Packet Recovery Mechanism on Buffer Size Requirements for Mobile VoIP Handoff |
title_full_unstemmed |
An Effect of Packet Recovery Mechanism on Buffer Size Requirements for Mobile VoIP Handoff |
title_sort |
effect of packet recovery mechanism on buffer size requirements for mobile voip handoff |
publishDate |
2007 |
url |
http://ndltd.ncl.edu.tw/handle/08834228432194165825 |
work_keys_str_mv |
AT yuchengxiao aneffectofpacketrecoverymechanismonbuffersizerequirementsformobilevoiphandoff AT xiāoyǒuchéng aneffectofpacketrecoverymechanismonbuffersizerequirementsformobilevoiphandoff AT yuchengxiao xíngdòngshìwǎnglùdiànhuàhuànshǒujiēduànfēngbāohuífùjīzhìduìhuǎnchōngqūxūqiúyǐngxiǎngzhītàntǎo AT xiāoyǒuchéng xíngdòngshìwǎnglùdiànhuàhuànshǒujiēduànfēngbāohuífùjīzhìduìhuǎnchōngqūxūqiúyǐngxiǎngzhītàntǎo AT yuchengxiao effectofpacketrecoverymechanismonbuffersizerequirementsformobilevoiphandoff AT xiāoyǒuchéng effectofpacketrecoverymechanismonbuffersizerequirementsformobilevoiphandoff |
_version_ |
1716845742792900608 |