LTE networks have been rapidly commercialized for 4G cellular communications systems in all over the world as well as Korea. Because many internet applications use TCP as their transport layer protocol, TCP throughput measurements and its performance improvements in LTE networks is very important. In this paper, we analyze the impact of “in-sequence delivery” in LTE link layer on TCP RTT increment. When HARQ or ARQ in LTE link layer is working frequently for error recovery, it increases TCP RTT and decreases TCP throughput seriously. Therefore, in order to get better TCP throughput with the same packet error probability, we should decrease TCP RTT when HARQ or ARQ in LTE link layer is working for error recovery. We propose "out-of-sequence delivery" in LTE link layer in order to decrease TCP RTT. From our test results, "out-of-sequence delivery" outperforms “in-sequence delivery”. While "out-of-sequence delivery" makes LTE link layer design simpler, but its throughput gain is considerable.
목차
Abstract 1. Introduction 2. LTE User Plane Protocol 3. Analysis of the Impact of “In-Sequence Delivery” on TCP RTT 4. “Out-of-Sequence Delivery” in LTE Link Layer 5. Conclusions References
키워드
LTE4GARQHARQTCPIn-Sequence Delivery
저자
Hyun-Seo Park [ Electronics and Telecommunications Research Institute, Daejeon, KOREA ]
Jae-Yong Lee [ Chungnam National University, Daejeon, KOREA ]
Byung-Chul Kim [ Chungnam National University, Daejeon, KOREA ]
보안공학연구지원센터(IJAST) [Science & Engineering Research Support Center, Republic of Korea(IJAST)]
설립연도
2006
분야
공학>컴퓨터학
소개
1. 보안공학에 대한 각종 조사 및 연구
2. 보안공학에 대한 응용기술 연구 및 발표
3. 보안공학에 관한 각종 학술 발표회 및 전시회 개최
4. 보안공학 기술의 상호 협조 및 정보교환
5. 보안공학에 관한 표준화 사업 및 규격의 제정
6. 보안공학에 관한 산학연 협동의 증진
7. 국제적 학술 교류 및 기술 협력
8. 보안공학에 관한 논문지 발간
9. 기타 본 회 목적 달성에 필요한 사업
간행물
간행물명
International Journal of Advanced Science and Technology
간기
월간
pISSN
2005-4238
수록기간
2008~2016
십진분류
KDC 505DDC 605
이 권호 내 다른 논문 / International Journal of Advanced Science and Technology Vol.37