Pub Date : 2000-12-17DOI: 10.1109/ICPWC.2000.905905
P. Ranjitkar, I. Suliman, P. Geil, M.M. Kuipers, R. Prasad
This paper describes an IP multicast implementation based on multicast extensions to open shortest path first (MOSPF) protocol. The MOSPF forwarding model presented in this study is used to forward multicast datagrams. The forwarding model has focused on interaction between MOSPF and OSPF in terms of group-membership link state advertisement (type-6 LSA) as well as developing a multicast routing table (MRT) and multicast forwarding cache (MFC). The MRT has been organised as a Patricia-based tree while the MFC has been maintained as hash-table data structures. The MFC entries are built from the local group database and the shortest path first (SPF) tree calculation. Since MOSPF protocol can only be deployed in networks running OSPF protocol, routing functionalities, such as flooding process, forming adjacencies, election of the designated router (DR) and the backup designated router (BDR), will be provided by the OSPF protocol. Implementation of MOSPF is required since MOSPF is the only multicasting routing protocol that can be configured for hierarchical multicast routing and also support for IP multicast's expanding ring search. In addition to that, MOSPF, like the other dense mode multicast routing protocols-distance vector multicast routing protocol (DVMRP) and protocol independent multicast (PIM) dense mode-is effective in commercial Internets.
{"title":"IP multicast implementation based on the multicast extensions to OSPF protocol","authors":"P. Ranjitkar, I. Suliman, P. Geil, M.M. Kuipers, R. Prasad","doi":"10.1109/ICPWC.2000.905905","DOIUrl":"https://doi.org/10.1109/ICPWC.2000.905905","url":null,"abstract":"This paper describes an IP multicast implementation based on multicast extensions to open shortest path first (MOSPF) protocol. The MOSPF forwarding model presented in this study is used to forward multicast datagrams. The forwarding model has focused on interaction between MOSPF and OSPF in terms of group-membership link state advertisement (type-6 LSA) as well as developing a multicast routing table (MRT) and multicast forwarding cache (MFC). The MRT has been organised as a Patricia-based tree while the MFC has been maintained as hash-table data structures. The MFC entries are built from the local group database and the shortest path first (SPF) tree calculation. Since MOSPF protocol can only be deployed in networks running OSPF protocol, routing functionalities, such as flooding process, forming adjacencies, election of the designated router (DR) and the backup designated router (BDR), will be provided by the OSPF protocol. Implementation of MOSPF is required since MOSPF is the only multicasting routing protocol that can be configured for hierarchical multicast routing and also support for IP multicast's expanding ring search. In addition to that, MOSPF, like the other dense mode multicast routing protocols-distance vector multicast routing protocol (DVMRP) and protocol independent multicast (PIM) dense mode-is effective in commercial Internets.","PeriodicalId":260472,"journal":{"name":"2000 IEEE International Conference on Personal Wireless Communications. Conference Proceedings (Cat. No.00TH8488)","volume":"235 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132425175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-12-17DOI: 10.1109/ICPWC.2000.905841
A. Risteski, P. Popovski, B. Spasenovski
A DS-CDMA system with integrated ECC (error control coding) technique is presented. The encoder is a serial concatenation of a turbo code and a Walsh orthogonal code. An iterative algorithm for MAP decoding is implemented in the receiver. Decoding and despreading are unified through a joint iterative process in terms of exchanging soft information among receiver components. Compared to similar DS-CDMA systems, in the region of signal-to-noise ratios of interest, the proposed system shows excellent performance even at low input block size. This approach suggests a convenient scheme that can be used to implement FEC (forward error correction) in a personal communication system, for applications intolerable to delay.
{"title":"Joint despreading and iterative decoding in DS-CDMA system with serially concatenated turbo code and Walsh code","authors":"A. Risteski, P. Popovski, B. Spasenovski","doi":"10.1109/ICPWC.2000.905841","DOIUrl":"https://doi.org/10.1109/ICPWC.2000.905841","url":null,"abstract":"A DS-CDMA system with integrated ECC (error control coding) technique is presented. The encoder is a serial concatenation of a turbo code and a Walsh orthogonal code. An iterative algorithm for MAP decoding is implemented in the receiver. Decoding and despreading are unified through a joint iterative process in terms of exchanging soft information among receiver components. Compared to similar DS-CDMA systems, in the region of signal-to-noise ratios of interest, the proposed system shows excellent performance even at low input block size. This approach suggests a convenient scheme that can be used to implement FEC (forward error correction) in a personal communication system, for applications intolerable to delay.","PeriodicalId":260472,"journal":{"name":"2000 IEEE International Conference on Personal Wireless Communications. Conference Proceedings (Cat. No.00TH8488)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134374094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-12-17DOI: 10.1109/ICPWC.2000.905909
S. Sengodan, G. Krishnamurthi, J. Rajahalme, R. Ravikanth
The last few years has seen a proliferation of the Internet, making it accessible to several millions of users worldwide. At the same time, the use of mobile devices such as cellular telephones and personal digital assistants (PDA) has been on the rise. Currently, we are beginning to see the convergence of these technologies whereby access to the Internet and other (potentially private) packet switched networks happens via mobile devices. The Internet protocol (IP) and the associated TCP/IP protocol suite - which is used in the Internet - is beginning to find its way into mobile devices as well. However, the cellular-IP convergence strategy and the extent to which the TCP/IP protocol suite is being embraced varies from one cellular standard to another. We compare differences in cellular-IP convergence strategies and discuss the impact that this has on cellular terminals.
{"title":"Impact of different cellular-IP convergence strategies on mobile terminals","authors":"S. Sengodan, G. Krishnamurthi, J. Rajahalme, R. Ravikanth","doi":"10.1109/ICPWC.2000.905909","DOIUrl":"https://doi.org/10.1109/ICPWC.2000.905909","url":null,"abstract":"The last few years has seen a proliferation of the Internet, making it accessible to several millions of users worldwide. At the same time, the use of mobile devices such as cellular telephones and personal digital assistants (PDA) has been on the rise. Currently, we are beginning to see the convergence of these technologies whereby access to the Internet and other (potentially private) packet switched networks happens via mobile devices. The Internet protocol (IP) and the associated TCP/IP protocol suite - which is used in the Internet - is beginning to find its way into mobile devices as well. However, the cellular-IP convergence strategy and the extent to which the TCP/IP protocol suite is being embraced varies from one cellular standard to another. We compare differences in cellular-IP convergence strategies and discuss the impact that this has on cellular terminals.","PeriodicalId":260472,"journal":{"name":"2000 IEEE International Conference on Personal Wireless Communications. Conference Proceedings (Cat. No.00TH8488)","volume":"303 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124228547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-12-17DOI: 10.1109/ICPWC.2000.905798
Y. S. Rao, M. Roy
This paper discusses different broadband wireless standards (LAN, WAN) currently under progress while mentioning key differences on physical (PHY) and data link control (DLC) layers. Harmonized global standards for all broadband wireless systems, from 2 GHz to 50 GHz would be a daunting task considering that organizations dealing with standards from the USA, Europe and Japan would have differing perceptions. Harmonization at the least would allow "coexistence" and at a maximum "interoperability". While strong differences of technical opinions persist over physical interfaces and data-link layers, there could be some limited goals of achieving a harmonized infrastructure between wireless LAN and new broadband networks with a common cellular-like infrastructure. Mobility in broadband access is another discussion item. Wide-area networks show the strongest signs of convergence, though some differences are yet to be ironed out. Among local area networks, separate USA and European wireless standards exist today and may even be too late to be harmonized. However, a new class of "personal area networks" still in evolution stages may offer the best possibilities of coexistence and interoperability. Bluetooth is an example in that direction.
{"title":"An overview on harmonization of broadband wireless standards","authors":"Y. S. Rao, M. Roy","doi":"10.1109/ICPWC.2000.905798","DOIUrl":"https://doi.org/10.1109/ICPWC.2000.905798","url":null,"abstract":"This paper discusses different broadband wireless standards (LAN, WAN) currently under progress while mentioning key differences on physical (PHY) and data link control (DLC) layers. Harmonized global standards for all broadband wireless systems, from 2 GHz to 50 GHz would be a daunting task considering that organizations dealing with standards from the USA, Europe and Japan would have differing perceptions. Harmonization at the least would allow \"coexistence\" and at a maximum \"interoperability\". While strong differences of technical opinions persist over physical interfaces and data-link layers, there could be some limited goals of achieving a harmonized infrastructure between wireless LAN and new broadband networks with a common cellular-like infrastructure. Mobility in broadband access is another discussion item. Wide-area networks show the strongest signs of convergence, though some differences are yet to be ironed out. Among local area networks, separate USA and European wireless standards exist today and may even be too late to be harmonized. However, a new class of \"personal area networks\" still in evolution stages may offer the best possibilities of coexistence and interoperability. Bluetooth is an example in that direction.","PeriodicalId":260472,"journal":{"name":"2000 IEEE International Conference on Personal Wireless Communications. Conference Proceedings (Cat. No.00TH8488)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121964077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-12-17DOI: 10.1109/ICPWC.2000.905793
Xufang Wang, V. Lau, T. S. Ng
We analyze the performance of a novel multiresolution joint source and channel coding (MR-JSCC) scheme for mobile radio channels with feedback. The transmitter and receiver can match the resolution of each other synchronously, according to the channel state information (CSI). Bandwidth requirements can be met by carefully adjusting the resolution thresholds. The threshold determination algorithm is outlined. Simulation results show that MR-JSCC scheme has much better performance than baseline-I (no UEP and no feedback) and baseline-II (UEP without feedback) at the same bandwidth and power.
{"title":"Performance analysis of multiresolution joint source-channel coding for mobile radio channels with feedback","authors":"Xufang Wang, V. Lau, T. S. Ng","doi":"10.1109/ICPWC.2000.905793","DOIUrl":"https://doi.org/10.1109/ICPWC.2000.905793","url":null,"abstract":"We analyze the performance of a novel multiresolution joint source and channel coding (MR-JSCC) scheme for mobile radio channels with feedback. The transmitter and receiver can match the resolution of each other synchronously, according to the channel state information (CSI). Bandwidth requirements can be met by carefully adjusting the resolution thresholds. The threshold determination algorithm is outlined. Simulation results show that MR-JSCC scheme has much better performance than baseline-I (no UEP and no feedback) and baseline-II (UEP without feedback) at the same bandwidth and power.","PeriodicalId":260472,"journal":{"name":"2000 IEEE International Conference on Personal Wireless Communications. Conference Proceedings (Cat. No.00TH8488)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130436794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-12-17DOI: 10.1109/ICPWC.2000.905855
H. Nikookar, B. Negash
This paper addresses the reduction of system sensitivity to the frequency offset due to time shaping of the multicarrier (MC) signal. Rectangular and Gaussian shapes (with different spreads) are considered. For a multipath channel, degradation of the performance of the OFDM system to the frequency offset for BPSK and QPSK modulation and for these waveshapes is investigated and compared. The effect of changing the number of carriers, as well as the multipath channel delay spread, on the sensitivity reduction of OFDM with shaping is thoroughly studied. Results show that the Gaussian shaped OFDM is much less sensitive to the frequency offset than conventional (rectangular) OFDM. Reducing the time spread of the Gaussian shape reduces the sensitivity. For OFDM with both rectangular and Gaussian shapes, sensitivity to frequency offset slightly increases by increasing the number of carriers. For a waveshaped OFDM system with a fixed spread of Gaussian shapes, performance degradation due to frequency offset is higher for BPSK than QPSK. Results show that, compared with conventional OFDM with 32 carriers, the Gaussian shaped MC, with a spread width of 10% of the symbol time, reduces the sensitivity of the system to frequency offset by a factor of almost 6 dB. Results can be used in the analysis and design of high-speed digital data transmission over wireless multipath fading channels.
{"title":"Frequency offset sensitivity reduction of multicarrier transmission by waveshaping","authors":"H. Nikookar, B. Negash","doi":"10.1109/ICPWC.2000.905855","DOIUrl":"https://doi.org/10.1109/ICPWC.2000.905855","url":null,"abstract":"This paper addresses the reduction of system sensitivity to the frequency offset due to time shaping of the multicarrier (MC) signal. Rectangular and Gaussian shapes (with different spreads) are considered. For a multipath channel, degradation of the performance of the OFDM system to the frequency offset for BPSK and QPSK modulation and for these waveshapes is investigated and compared. The effect of changing the number of carriers, as well as the multipath channel delay spread, on the sensitivity reduction of OFDM with shaping is thoroughly studied. Results show that the Gaussian shaped OFDM is much less sensitive to the frequency offset than conventional (rectangular) OFDM. Reducing the time spread of the Gaussian shape reduces the sensitivity. For OFDM with both rectangular and Gaussian shapes, sensitivity to frequency offset slightly increases by increasing the number of carriers. For a waveshaped OFDM system with a fixed spread of Gaussian shapes, performance degradation due to frequency offset is higher for BPSK than QPSK. Results show that, compared with conventional OFDM with 32 carriers, the Gaussian shaped MC, with a spread width of 10% of the symbol time, reduces the sensitivity of the system to frequency offset by a factor of almost 6 dB. Results can be used in the analysis and design of high-speed digital data transmission over wireless multipath fading channels.","PeriodicalId":260472,"journal":{"name":"2000 IEEE International Conference on Personal Wireless Communications. Conference Proceedings (Cat. No.00TH8488)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125559068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-12-17DOI: 10.1109/ICPWC.2000.905916
S. Kishore, M. V. Clark, L. Greenstein
We use analysis and simulation to investigate the downlink data rate of a wideband CDMA system, wherein the rate is adaptively varied based on the condition of the multipath fading channel. We use a previously published set of formulas for estimating output signal-to-distortion ratio which, in turn, permits us to compute the instantaneous allowed data rate per user for any fading channel response for three adaptive receivers. In addition, we use a previously published statistical model for path gain and delay spread to simulate a random population of downlink user terminals, including an ensemble of instantaneous channel responses for each. The result for each kind of receiver is a probability distribution, taken over the environment, of the multipath-averaged downlink data rate. We call the average of each such distribution the cell-averaged data rate (CADR), which we quantify for a variety of conditions (channel parameters, receiver type, cellular architecture). Our results demonstrate the superiority of the adaptive minimum mean square error (MMSE) receiver over the matched filter (MF) receiver, in terms of both data rate and robustness to the multipath parameters (e.g., median delay spread, delay profile shape). They also demonstrate the benefits against multipath fading of cell site diversity and the reductions in throughput due to multicell interference.
{"title":"The throughput of adaptive spread spectrum communication over multipath dispersive channels","authors":"S. Kishore, M. V. Clark, L. Greenstein","doi":"10.1109/ICPWC.2000.905916","DOIUrl":"https://doi.org/10.1109/ICPWC.2000.905916","url":null,"abstract":"We use analysis and simulation to investigate the downlink data rate of a wideband CDMA system, wherein the rate is adaptively varied based on the condition of the multipath fading channel. We use a previously published set of formulas for estimating output signal-to-distortion ratio which, in turn, permits us to compute the instantaneous allowed data rate per user for any fading channel response for three adaptive receivers. In addition, we use a previously published statistical model for path gain and delay spread to simulate a random population of downlink user terminals, including an ensemble of instantaneous channel responses for each. The result for each kind of receiver is a probability distribution, taken over the environment, of the multipath-averaged downlink data rate. We call the average of each such distribution the cell-averaged data rate (CADR), which we quantify for a variety of conditions (channel parameters, receiver type, cellular architecture). Our results demonstrate the superiority of the adaptive minimum mean square error (MMSE) receiver over the matched filter (MF) receiver, in terms of both data rate and robustness to the multipath parameters (e.g., median delay spread, delay profile shape). They also demonstrate the benefits against multipath fading of cell site diversity and the reductions in throughput due to multicell interference.","PeriodicalId":260472,"journal":{"name":"2000 IEEE International Conference on Personal Wireless Communications. Conference Proceedings (Cat. No.00TH8488)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126757112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-12-17DOI: 10.1109/ICPWC.2000.905800
Z. Bu, Haifeng Wang, J. Lilleberg, Shixin Cheng
A novel MAI-free multiuser receiver is proposed. A reference vector, which is different to the desired signals but creates the same multiple access interference, is generated. Thus the multiple access interference is regenerated by a new correlator and subtracted from the output of the conventional detector. The reference vector can be computed at a very low complexity cost by using the linear programming method (simplex algorithm). The simulation results show that the proposed scheme approaches the performance of the decorrelating detector but with much less complexity.
{"title":"Novel multiuser interference cancellation using simplex algorithm for CDMA systems","authors":"Z. Bu, Haifeng Wang, J. Lilleberg, Shixin Cheng","doi":"10.1109/ICPWC.2000.905800","DOIUrl":"https://doi.org/10.1109/ICPWC.2000.905800","url":null,"abstract":"A novel MAI-free multiuser receiver is proposed. A reference vector, which is different to the desired signals but creates the same multiple access interference, is generated. Thus the multiple access interference is regenerated by a new correlator and subtracted from the output of the conventional detector. The reference vector can be computed at a very low complexity cost by using the linear programming method (simplex algorithm). The simulation results show that the proposed scheme approaches the performance of the decorrelating detector but with much less complexity.","PeriodicalId":260472,"journal":{"name":"2000 IEEE International Conference on Personal Wireless Communications. Conference Proceedings (Cat. No.00TH8488)","volume":"86 13","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113932883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-12-17DOI: 10.1109/ICPWC.2000.905850
Jay P. Singh, S. Adlakha, Subrat Kar, S. Prasad
With the ever-increasing demand for easy portability and mobility of devices supporting diverse mobile multimedia applications, the need for the adaptation of broadband infrastructure to the wireless scenario has arisen. Mobile multimedia networks like the wireless ATM are faced with challenges relating to user mobility management and channel access. The issue of handovers is addressed. We propose, simulate and present the relative performance appraisal of a handover strategy employing network-initiated bandwidth renegotiation and redistribution. The handover protocol is shown to perform better than static and dynamic handover schemes in terms of handoff connection drop probability.
{"title":"Dynamic resource allocation with network initiated bandwidth renegotiation (DRABR) protocol for providing seamless handovers in wireless ATM networks","authors":"Jay P. Singh, S. Adlakha, Subrat Kar, S. Prasad","doi":"10.1109/ICPWC.2000.905850","DOIUrl":"https://doi.org/10.1109/ICPWC.2000.905850","url":null,"abstract":"With the ever-increasing demand for easy portability and mobility of devices supporting diverse mobile multimedia applications, the need for the adaptation of broadband infrastructure to the wireless scenario has arisen. Mobile multimedia networks like the wireless ATM are faced with challenges relating to user mobility management and channel access. The issue of handovers is addressed. We propose, simulate and present the relative performance appraisal of a handover strategy employing network-initiated bandwidth renegotiation and redistribution. The handover protocol is shown to perform better than static and dynamic handover schemes in terms of handoff connection drop probability.","PeriodicalId":260472,"journal":{"name":"2000 IEEE International Conference on Personal Wireless Communications. Conference Proceedings (Cat. No.00TH8488)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122448675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-12-17DOI: 10.1109/ICPWC.2000.905796
E. Hossain, Dong In Kim, C. Scholefield, V. Bhargava
The performance of TCP (transmission control protocol) is evaluated for downlink data transmission in a cellular WCDMA (wideband code division multiple access) network where variable rate transmission is supported at the RLC (radio link control)/MAC (medium access control) level. A simple rate search procedure (based on the number of simultaneous TCP connections and the channel condition) is proposed for the RLC/MAC level transmission rate selection for downlink data transmission. The dynamic rate variation is assumed to be achieved by using single-code transmission with variable spreading factor, where the spreading factor varies inversely with the transmission rate. A novel 'mean-sense' approach to calculate intercell interference in such an environment is developed assuming homogeneous traffic load (in terms of active TCP connections) in different cells. The impact of the different physical layer, RLC/MAC layer and TCP parameters on the end-to-end throughput performance are investigated by simulating the system dynamics under multiple concurrent TCP connections.
{"title":"TCP performance in WCDMA-based cellular wireless IP networks","authors":"E. Hossain, Dong In Kim, C. Scholefield, V. Bhargava","doi":"10.1109/ICPWC.2000.905796","DOIUrl":"https://doi.org/10.1109/ICPWC.2000.905796","url":null,"abstract":"The performance of TCP (transmission control protocol) is evaluated for downlink data transmission in a cellular WCDMA (wideband code division multiple access) network where variable rate transmission is supported at the RLC (radio link control)/MAC (medium access control) level. A simple rate search procedure (based on the number of simultaneous TCP connections and the channel condition) is proposed for the RLC/MAC level transmission rate selection for downlink data transmission. The dynamic rate variation is assumed to be achieved by using single-code transmission with variable spreading factor, where the spreading factor varies inversely with the transmission rate. A novel 'mean-sense' approach to calculate intercell interference in such an environment is developed assuming homogeneous traffic load (in terms of active TCP connections) in different cells. The impact of the different physical layer, RLC/MAC layer and TCP parameters on the end-to-end throughput performance are investigated by simulating the system dynamics under multiple concurrent TCP connections.","PeriodicalId":260472,"journal":{"name":"2000 IEEE International Conference on Personal Wireless Communications. Conference Proceedings (Cat. No.00TH8488)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132660118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：