Efficient Keep-Alive Mechanism in Mobile Ad-hoc Generic Access Network (GAN)

在行動點對點通用存取網路下的有效保持存活機制

廖士杰(Shih-Chieh Liao)

指導教授 ： 陳志成

國立清華大學/電機資訊學院/資訊工程學系/碩士(2009年)

https://doi.org/10.6843/NTHU.2009.00603

摘要

The integration of cellular networks and unlicensed-spectrum networks has become an important issue for next generation wireless communications. The 3rd Generation Partnership Project (3GPP) has proposed an architecture called Generic Access Network (GAN) to allow unlicensed-spectrum radios such as wireless LAN (WLAN) or Bluetooth to access cellular networks. Most of the unlicensed-spectrum radios can form an ad-hoc network in which multiple radio links are used to reach the 3GPP core network. However, the forwarding of periodical signalingmessages from ad-hoc network to the 3GPP core network will cause significant overhead. To reduce the total amount of periodical signaling messages, we propose an efficient Keep Alive mechanism to reduce the signaling messages at the transport layer and IP layer in GAN. The simulation results show that our proposed mechanism can significantly reduce the amount of periodical signaling messages and decrease the deregistration rate in GAN.

關鍵字

通用存取網路 ； 存活機制 ； 行動點對點網路

並列摘要

在下一代無線通訊中，蜂巢式網路(cellular network)與非授權行動接取網路(Generic Access Network)的整合已經變成重要的議題。第三代夥伴合作計畫(3GPP)已提出一個架構，被稱為通用存取網路，它允許非授權頻譜無線訊號，像無線區域網路(WLAN)或藍芽(Bluetooth)，去存取蜂巢式網路。大部分非授權頻譜能夠形成行動點對點網路，在這網路下使用者會有多條連線到3GPP的核心網路，然而轉送從行動點對點網路所發出的周期性控制訊息會造成3GPP核心網路的重大負擔。為了減少在通用存取網路下的周期性控制訊息量，我們提出了一個有效存活機制去減少在傳輸層(transport layer)和網路層(IP layer)訊息量。實驗模擬結果證實我們提出的方法確實有效減少周期性控制訊息量並能減低在通訊存取網路下使用者被撤銷註冊的機率。

並列關鍵字

GAN ； Keep-Alive ； Ad-hoc

參考文獻

[5] “Protocols (Stage 3).” UMA technical specification R1.0.4, May 2005.

[1] “The 3rd generation partnership project.” http://www.3gpp.org/.

[4] “Architecture (Stage 2).” UMA technical specification R1.0.4, May 2005.

[6] IEEE, “Std 802.11: Wireless LAN medium access control (MAC) and physical layer

PHY specifications,” Nov. 1997.