Research - TCP/IP over Air Links - CDMA/HDR

Literature Scanning - A List, Temporarily  (ls -alt)

• Y. Bai, P. Zhu, A. Rudrapatna, A. T. Ogielski. Performance of TCP/IP over IS-2000 based CDMA radio links. Proc. IEEE 52th VTC'2000-Fall, 2000
... In this paper, we investigate the system performance and compatibility of Internet protocol TCP/IP integrated with wireless network protocols over IS-2000 based CDMA (i.e., cdma2000) lossy radio links. ... Specifically, we evaluate system perfor-mance with two operation modes (transparent, and non-transparent) at the IS-707 Radio Link Protocol (RLP) layer. ...
... Transparent RLP does not provide any retransmission of corrupted or missed data frames. In contrast, non-transparent RLP uses pure NAK-based selective-repeat ARQ protocol to retransmit lost data frames. ...
... It was presented that, in a high-bandwidth cdma2000 system, quite large Physical layer frame size and high Physical layer FER may result in unacceptable overall system performance.

• Y. Bai, A. T. Ogielski. TCP over asymmetric CDMA radio links. Proc. IEEE 52th VTC'2000-Fall, 2000
... To exploit the asymmetry, different uplink and downlink channel data rates can be allocated in wireless Internet access through third-generation mobile cellular systems. ... It is shown that appropriate downlink/uplink data rate ratio should be determined in order to achieve com-parable system performance as that of the symmetric radio links, and the required data rate ratio varies with radio channel conditions, especially Frame Error Rates (FERs). ...

• F. Khan, S. Kumar, K. Medepalli, S. Nanda. TCP performance over cdma2000 RLP. Proc. IEEE 51st VTC'2000-Spring, 41-45, 2000
This paper provides performance results for TCP over cdma2000. ... The goal is to analyze the impact of TCP window size, RTT, wireless channel bandwidth, FER model and RLP transmission delays on end-to-end transport. Our findings demonstrate that the (1,1,1,1,1) NAK scheme outperforms the (2,3) NAK scheme when the errors are correlated. This is also true for non-correlated error case and larger TCP window size. However, with non-correlated errors and comparatively smaller TCP window size, the (2,3) NAK scheme performs better. ...

• A. Chockalingam, Gang Bao. Performance of TCP/RLP Protocol Stack on Correlated Fading DS-CDMA Wireless Links. IEEE Trans. on VT, 49(1):28-33, 2000
... It is shown that, because of significant burstiness in RLP frame errors in highly correlated Rayleigh fading, longer persistence at the RLP layer to recover lost RLP frames (more than the IS-99 specified 3 retransmission attempts at the RLP layer) is beneficial at low link fading margins.

• A. S. Joshi, M. N. Umesh, A. Kumar, T. Mukhopadhyay, K. Natesh, S. Sen, A. Arunachalam. Performance evaluation of TCP over radio link protocol in TIA/EIA/IS-99 environment. Proc. IEEE ICPWC'99, 216-220, 1999
... We concentrate on the sensitivity study of TCP throughput and delay, when the parameters of RLP like segmentation depth and maximum number of retrials varied. Also we consider the effect of Maximum TCP Advertised window size on the above mentioned TCP performance parameters. ... We use a two state Markov model to capture the mobility characteristics of the channel. ...

• G. Wu, Y. Bai, J. Lai, A. Ogielski. Interactions between TCP and RLP in wireless Internet. Proc. IEEE GlobeCom'99, 661-666, 1999
... We propose a new protocol stack including Interlayer Signaling Pipe (ISP) across layers for the wireless Internet access scenario. In this paper, we investigate the interactions of two distinct loss recovery mechansims employed by TCP and RLP (radio link protocol) during a low-speed TCP connection over a radio channel with correlated losses to show the necessity of the ISP. ...

• Y. Bai, G. Wu, A. T. Ogielski. TCP/RLP coordination and interprotocol signaling for wireless Internet. Proc. 49th VTC'99, 1945-1951, 1999
We investigate the interactions of two distinct loss recovery mechanisms employed by TCP and IS-707, a partial error recovery Radio Link Protocol (RLP), during a long-time, low-speed TCP connection over a radio channel with correlated losses. ... An improvement of IS-707 RLP consisting of the addition of a limited number of probing frames after a TCP segment transmission is proposed to speed up frame loss recovery. That modification alone can very significantly im-prove TCP throughput in the high t?ame loss regime with weak correlations, but cannot equally well cope with the effects of consecutive TCP packet losses. Further improvement of TCP throughput in the latter case might be obtained by reducing the maximum TCP retransmission timeout RTOmax to the extent that it keeps the network stable.

• Y. Bai, A. T. Ogielski, G. Wu. Interactions of TCP and radio link ARQ protocol. Proc. IEEE 50th VTC'99-Fall, 1710-1714, 1998
... In this paper, we investigate interactions between these two separate error control mechanisms by simulating TCP Reno over IS-707, a radio link ARQ protocol standard for spread spectrum digital cellular systems. We show the effects of TCP sliding window size to the over-all system performance under a variety of radio link scenarios, and present the beneficial effects of longer persistence in radio link frame error recovery for best-effort bulk data applications.

• D. Huang, J. J. Shi. Performance of TCP over radio link with adaptive channel coding and ARQ. Proc. IEEE 49th VTC, 2084-2088, 1999
... In this paper, we study the performance of TCP over adaptive RLP. We investigate this problem in the context of the TDMA (IS-136 and IS-130) wireless network, where the wireless data is transmitted through the reliable RLP. The RLP is modified with an adaptive channel coding scheme. ...

• H. M. Syed, K. Das, M. Devetsikiotis. TCP performance and buffer provisioning for Internet in wireless networks. Proc. Int'l Symp. on Modeling, Analysis and Simulation of Computer and Telecommunication System, 48-55, 1999
... The focus of this work is to identify the network parameters that significantly impact the performance, and more specific, tune the TCP against wireless channel losses. In particular, the research investigates the following: (a) the way RLP interacts with the TCP for Internet traffic in achieving the overall TCP/RLP throughput, and (b) the role of the buffer space available at the mobile receiver in enhancing the performance for Internet applications.

• T. Suarez, L. W. Hawkes. TCP performance over an IS-136 (radio link) wireless networks. Proc. CSMA'96, 1998

• A. Chockalingam, G. Bao. Performance of TCP/RLP protocol stack on correlated fading DS-CDMA wireless links. Proc. IEEE ICC'98, 363-367, 1998

• S. Park, Y. Song, D. Cho. Performance improvements of mobile data protocol in wire and wireless interworking environments. Proc. IEEE GlobeCom'98, 2646-2651, 1998
... To provide efficient mobile data service based on TCP, the wire and wireless interworking module with analysis function of TCP segment header protects the duplicated transmission of TCP frames. Also, by using the forwarding mechanism of states information and buffered data in the interworking module, it is possible to recover frame loss occurring in handover quickly. ...

• D. Cypher, S. Wakid. Nomadic computing and CDMA. Proc. IEEE 6th ICDCS'97, 132-137, 1997
This paper shows how reliable data services can be provided in an error prone wireless environment using CDMA and a link layer retransmission protocol. A CDMA encoder using Walsh codes for 1.85 to 1.99 GHz PCS applications is simulated under various error conditions with varying packet size to determine minimum acceptable QOS relative to error templates. ... Small packet sizes of about 50 to 100 bytes appear to provide promise for commercial implementations. Such implementations are also shown to be able to support upper layer TCP/IP services when TCP timers are disabled.

• M. C. Chuah, B. T. Doshi, S. Dravida, R. P. Ejzak, S. Nanda. Performance comparisons of two retransmission protocols for CDMA. Proc. IEEE 46th VTC'96, 272-276, 1996
We describe a new radio link protocol for CDMA IS-95 circuit-mode data. This protocol, (Protocol S), relies on a single level of recovery and uses a flexible segmentation and recovery (FSAR) sublayer to efficiently pack data frames into physical layer bursts. We next describe Protocol T, that consists of two levels of recovery and compare the performance of Protocol T with Protocol S. Protocol T has been standardized for CDMA circuit-mode data as IS-99[ 1]. We find that the complexity of the two level recovery mechanism buys higher throughput through reduced overhead. However, the choice of TCP (and its associated congestion control mechanism) as the upper layer of recovery on the link layer, leads to long fade recovery times for Protocol T.

• G. Bao. Performance evaluation of TCP/RLP protocol stack over CDMA wireless link. Proc. IEEE ICCT'96, 710-713, 1996
... In particular, we focus on TCP and RLP of the protocol slack since the fluctuation of sys-tern! performance is largely caused by Automatic Repeat zest (ARQ) mechanisms implemented at these two layers. ...