Pub Date : 1900-01-01DOI: 10.1109/COMSNETS.2017.7945427
A. Rao, Visali Mushunuri, S. Shailendra, B. Panigrahi, Anantha Simha
Robotics is penetrating into all aspects of human life from being a helper at daily chores to a technician performing precision operations at warehouse. Deploying mobile robots and Unmanned Aerial Vehicles (UAV) to conduct search and rescue operations during industrial accidents and natural disasters is one of the recent applications of robotics. These robots/UAVs are controlled remotely over wireless connections. Any disruption in connectivity of robots/UAVs may be disastrous. It is possible to reduce the chances of outage and improve reliability of communication by using multiple available communication interfaces on a device. In this demo paper, we demonstrate the use of Multipath TCP (MPTCP) in robotics communication. MPTCP uses all available communication interfaces concurrently for communication. Its use in robotics improves the connection reliability as well as the throughput. We have ported MPTCP on resource constrained devices and conducted experiments to evaluate throughput performance and error resilience of different variants of MPTCP by comparing it with that of TCP.
{"title":"Reliable robotic communication using multi-path TCP","authors":"A. Rao, Visali Mushunuri, S. Shailendra, B. Panigrahi, Anantha Simha","doi":"10.1109/COMSNETS.2017.7945427","DOIUrl":"https://doi.org/10.1109/COMSNETS.2017.7945427","url":null,"abstract":"Robotics is penetrating into all aspects of human life from being a helper at daily chores to a technician performing precision operations at warehouse. Deploying mobile robots and Unmanned Aerial Vehicles (UAV) to conduct search and rescue operations during industrial accidents and natural disasters is one of the recent applications of robotics. These robots/UAVs are controlled remotely over wireless connections. Any disruption in connectivity of robots/UAVs may be disastrous. It is possible to reduce the chances of outage and improve reliability of communication by using multiple available communication interfaces on a device. In this demo paper, we demonstrate the use of Multipath TCP (MPTCP) in robotics communication. MPTCP uses all available communication interfaces concurrently for communication. Its use in robotics improves the connection reliability as well as the throughput. We have ported MPTCP on resource constrained devices and conducted experiments to evaluate throughput performance and error resilience of different variants of MPTCP by comparing it with that of TCP.","PeriodicalId":168357,"journal":{"name":"2017 9th International Conference on Communication Systems and Networks (COMSNETS)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121770748","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 : 1900-01-01DOI: 10.1109/COMSNETS.2017.7945358
Nitu Gangwar, Tushar Semwal, S. B. Nair
Railways constitute one of the most extensively used mode of transportation in the world. The global passenger traffic is expected to grow steadily in the coming years. This growth in traffic thus calls for a corresponding increase in the comfort and service provided to passengers on-board a railway train. In this paper, we propose CARE, an Internet of Things (IoT) based system for catering to passenger services and requests in railway trains. The system leverages the use of Bluetooth Low Energy (BLE) technology to track the location of crew members (mobile resources) within a train. An On-line Proximity-Aware Mobile (OPAM) multi-objective resource allocation algorithm has been devised which on the basis of service arrival time, location information and workload factor, allocates crew members to the requests from the passengers. We have experimentally evaluated the performance of our approach and found it to be far better than the conventionally used purely centralized method. For inter train and station scenarios, a mobile agent based solution has been proposed to locate the resources not available within a train.
{"title":"CARE: An IoT based system for passenger service and comfort in railways","authors":"Nitu Gangwar, Tushar Semwal, S. B. Nair","doi":"10.1109/COMSNETS.2017.7945358","DOIUrl":"https://doi.org/10.1109/COMSNETS.2017.7945358","url":null,"abstract":"Railways constitute one of the most extensively used mode of transportation in the world. The global passenger traffic is expected to grow steadily in the coming years. This growth in traffic thus calls for a corresponding increase in the comfort and service provided to passengers on-board a railway train. In this paper, we propose CARE, an Internet of Things (IoT) based system for catering to passenger services and requests in railway trains. The system leverages the use of Bluetooth Low Energy (BLE) technology to track the location of crew members (mobile resources) within a train. An On-line Proximity-Aware Mobile (OPAM) multi-objective resource allocation algorithm has been devised which on the basis of service arrival time, location information and workload factor, allocates crew members to the requests from the passengers. We have experimentally evaluated the performance of our approach and found it to be far better than the conventionally used purely centralized method. For inter train and station scenarios, a mobile agent based solution has been proposed to locate the resources not available within a train.","PeriodicalId":168357,"journal":{"name":"2017 9th International Conference on Communication Systems and Networks (COMSNETS)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132242291","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 : 1900-01-01DOI: 10.1109/COMSNETS.2017.7945396
Prnay Jain, S. Varma, Ankit, Hari Prabhat Gupta, Tanima Dutta
Over the last decades, major advancements in wired and wireless communication networks gave rise to the Networked Control Systems (NCS) for bringing automation to traditional control systems. Different components of a control system interact with each other through a network without any human intervention. Traditional control system models is not very suitable for predicting the stability of the system. In this paper, we propose a supervised approach for modelling a NCS using the previous working data of the system. The supervised model can be either a classifier or a regression model based on whether the output to be predicted is discrete or continuous. The main advantage of our approach is the ability to use it on any NCS provided that the previous working data is available. We have used dimensionality reduction techniques for dealing with large amount of features. The experimental results showcase the efficiency of the proposed approach.
{"title":"A supervised approach towards network control system modelling","authors":"Prnay Jain, S. Varma, Ankit, Hari Prabhat Gupta, Tanima Dutta","doi":"10.1109/COMSNETS.2017.7945396","DOIUrl":"https://doi.org/10.1109/COMSNETS.2017.7945396","url":null,"abstract":"Over the last decades, major advancements in wired and wireless communication networks gave rise to the Networked Control Systems (NCS) for bringing automation to traditional control systems. Different components of a control system interact with each other through a network without any human intervention. Traditional control system models is not very suitable for predicting the stability of the system. In this paper, we propose a supervised approach for modelling a NCS using the previous working data of the system. The supervised model can be either a classifier or a regression model based on whether the output to be predicted is discrete or continuous. The main advantage of our approach is the ability to use it on any NCS provided that the previous working data is available. We have used dimensionality reduction techniques for dealing with large amount of features. The experimental results showcase the efficiency of the proposed approach.","PeriodicalId":168357,"journal":{"name":"2017 9th International Conference on Communication Systems and Networks (COMSNETS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132604241","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 : 1900-01-01DOI: 10.1109/COMSNETS.2017.7945360
Ritu Sharma, M. Das
Web of world facilitates search results on massive collection of data using Internet. While obtaining search results corresponding to a particular search query, authentication of search results becomes an important question, as different sources contribute data in every moment which are stored in (un)trusted third party servers. In this paper, we discuss on the authenticated search results of some recent works and then present an improved scheme that ensures the authenticity of the search results corresponding to a search query over Internet. The improved scheme is based on the scheme [1] that uses the concept of conjunctive keyword search. We first observe some weaknesses in [1] and then construct an improved scheme using strong authentication primitives. We show that the improved scheme can achieve better efficiency and mitigate the security weaknesses in [1]. The prototype implementation of the improved scheme shows its practicality in future Internet applications including online search engines.
Web of world利用互联网为海量数据收集提供了方便的搜索结果。在获取特定搜索查询对应的搜索结果时，搜索结果的身份验证成为一个重要问题，因为不同的来源每时每刻都在提供数据，这些数据存储在(不)可信的第三方服务器中。本文讨论了近年来的一些研究成果，在此基础上提出了一种改进的方案，以保证Internet上搜索查询所对应的搜索结果的真实性。改进方案基于方案[1]，该方案使用了连接关键字搜索的概念。我们首先观察了[1]中的一些弱点，然后使用强认证原语构建了一个改进的方案。我们证明了改进后的方案可以获得更好的效率，并缓解了[1]中的安全弱点。改进方案的原型实现表明了其在包括在线搜索引擎在内的未来互联网应用中的实用性。
{"title":"On the verification of conjunctive keyword search results using authenticated crawlers","authors":"Ritu Sharma, M. Das","doi":"10.1109/COMSNETS.2017.7945360","DOIUrl":"https://doi.org/10.1109/COMSNETS.2017.7945360","url":null,"abstract":"Web of world facilitates search results on massive collection of data using Internet. While obtaining search results corresponding to a particular search query, authentication of search results becomes an important question, as different sources contribute data in every moment which are stored in (un)trusted third party servers. In this paper, we discuss on the authenticated search results of some recent works and then present an improved scheme that ensures the authenticity of the search results corresponding to a search query over Internet. The improved scheme is based on the scheme [1] that uses the concept of conjunctive keyword search. We first observe some weaknesses in [1] and then construct an improved scheme using strong authentication primitives. We show that the improved scheme can achieve better efficiency and mitigate the security weaknesses in [1]. The prototype implementation of the improved scheme shows its practicality in future Internet applications including online search engines.","PeriodicalId":168357,"journal":{"name":"2017 9th International Conference on Communication Systems and Networks (COMSNETS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131174398","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 : 1900-01-01DOI: 10.1109/COMSNETS.2017.7945434
Sonia Soubam, Manisha Agrawal, Vinayak Naik
There are smart apps to track our liquid intake and remind us to drink whenever we fall short of our target. However, these apps either require a specialized container or manual input from the user. They cannot account for spilled liquid or liquid consumed by other people. We propose an app, which allows user to use a container of his choice. It consists of a detachable container base, which houses a load sensor to measure amount of liquid consumed in each sip and a smartwatch that uses accelerometer sensor data to detect drinking motion of the hand using machine learning techniques. The detachable base can be attached to any container. The smartwatch is used to eliminate accounting of spilled liquid and consumption by other people. The base requires a one time calibration for container and liquid in it. We evaluated the container base for a thermos, a disposable bottle, and a plastic water bottle, and for water, tea, milk, soda, juice and milkshake. Assuming a person consumes 25 ml of liquid per sip, amounting to 1 litre of liquid consumed a day, our proposed app reported 934 ml of liquid consumed.
{"title":"Using an Arduino and a smartwatch to measure liquid consumed from any container","authors":"Sonia Soubam, Manisha Agrawal, Vinayak Naik","doi":"10.1109/COMSNETS.2017.7945434","DOIUrl":"https://doi.org/10.1109/COMSNETS.2017.7945434","url":null,"abstract":"There are smart apps to track our liquid intake and remind us to drink whenever we fall short of our target. However, these apps either require a specialized container or manual input from the user. They cannot account for spilled liquid or liquid consumed by other people. We propose an app, which allows user to use a container of his choice. It consists of a detachable container base, which houses a load sensor to measure amount of liquid consumed in each sip and a smartwatch that uses accelerometer sensor data to detect drinking motion of the hand using machine learning techniques. The detachable base can be attached to any container. The smartwatch is used to eliminate accounting of spilled liquid and consumption by other people. The base requires a one time calibration for container and liquid in it. We evaluated the container base for a thermos, a disposable bottle, and a plastic water bottle, and for water, tea, milk, soda, juice and milkshake. Assuming a person consumes 25 ml of liquid per sip, amounting to 1 litre of liquid consumed a day, our proposed app reported 934 ml of liquid consumed.","PeriodicalId":168357,"journal":{"name":"2017 9th International Conference on Communication Systems and Networks (COMSNETS)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133680912","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 : 1900-01-01DOI: 10.1109/COMSNETS.2017.7945420
M. Varma, Hema Kumar Yarnagula, V. Tamarapalli
HTTP based adaptive streaming technologies have become the primary vehicle for delivering live video content on the Internet. The WebRTC stack has opened up the possibility of creating a purely browser based and plugin free mechanism of utilizing peer to peer upload bandwidth to assist HTTP based streaming systems and hence make them easier to scale. Accordingly, we have implemented a WebRTC-based peer assisted framework for HTTP live streaming. We have further experimentally evaluated its performance with varying peer density. Our experimental results reveals that our framework reduces more than three fourth of the server load by serving the segment request from the neighbouring peers.
{"title":"WebRTC-based peer assisted framework for HTTP live streaming","authors":"M. Varma, Hema Kumar Yarnagula, V. Tamarapalli","doi":"10.1109/COMSNETS.2017.7945420","DOIUrl":"https://doi.org/10.1109/COMSNETS.2017.7945420","url":null,"abstract":"HTTP based adaptive streaming technologies have become the primary vehicle for delivering live video content on the Internet. The WebRTC stack has opened up the possibility of creating a purely browser based and plugin free mechanism of utilizing peer to peer upload bandwidth to assist HTTP based streaming systems and hence make them easier to scale. Accordingly, we have implemented a WebRTC-based peer assisted framework for HTTP live streaming. We have further experimentally evaluated its performance with varying peer density. Our experimental results reveals that our framework reduces more than three fourth of the server load by serving the segment request from the neighbouring peers.","PeriodicalId":168357,"journal":{"name":"2017 9th International Conference on Communication Systems and Networks (COMSNETS)","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124261802","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 : 1900-01-01DOI: 10.1109/COMSNETS.2017.7945458
Palani Kumar, Meenakshi D'Souza
Evolution of Internet of Things (IoT) demands interconnection of many autonomous and heterogeneous devices. Several such devices have very limited power. Every bit transmission consumes power and it is critical. The efficient power usage is a challenge. In this paper, we model an IoT device as a simple Hidden Markov Model (HMM) with a finite number of states and well determined emission probabilities. States in our HMM indicates the status of a device. We use the HMM to efficiently orchestrate the heartbeat duration of an IoT system. Our approach can identify the device anomaly with high accuracy and also save the end device power, by intelligently transmitting heartbeats based on HMM analysis. Our experimental result shows that, determination of device anomaly can be as high as 98%.
{"title":"Design a power aware methodology in IoT based on Hidden Markov Model","authors":"Palani Kumar, Meenakshi D'Souza","doi":"10.1109/COMSNETS.2017.7945458","DOIUrl":"https://doi.org/10.1109/COMSNETS.2017.7945458","url":null,"abstract":"Evolution of Internet of Things (IoT) demands interconnection of many autonomous and heterogeneous devices. Several such devices have very limited power. Every bit transmission consumes power and it is critical. The efficient power usage is a challenge. In this paper, we model an IoT device as a simple Hidden Markov Model (HMM) with a finite number of states and well determined emission probabilities. States in our HMM indicates the status of a device. We use the HMM to efficiently orchestrate the heartbeat duration of an IoT system. Our approach can identify the device anomaly with high accuracy and also save the end device power, by intelligently transmitting heartbeats based on HMM analysis. Our experimental result shows that, determination of device anomaly can be as high as 98%.","PeriodicalId":168357,"journal":{"name":"2017 9th International Conference on Communication Systems and Networks (COMSNETS)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124319693","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 : 1900-01-01DOI: 10.1109/COMSNETS.2017.7945431
Prabir Mallick, S. Sarkar, Pabitra Mitra
In this paper we address the problem of decision making for transporters in an online freight exchange platform. Two properties of online freight exchange makes the decision making challenging for a transporter — highly competitive nature of the market and, uncertainty in availability of consignments. Additionally the driver's return to the home location within a predefined duration is yet another challenge in the decision making process. In order to secure a contract to carry a consignment, a transporter needs to take part in an online auction process. So a transporter needs to take the decision whether to bid for a consignment from the set of available consignments or to wait for some time in order to get a better consignment. We develop an algorithm which recommends the best decision prior to taking part in such an auction. The evaluation results of the proposed algorithm achieves maximized profits and within a pre-decided duration of time — from home location to destination(s) and again back to home — as set by the driver. It also performs better in terms of our objective function when compared with a naive greedy decision making algorithm.
{"title":"Decision recommendation system for transporters in an online freight exchange platform","authors":"Prabir Mallick, S. Sarkar, Pabitra Mitra","doi":"10.1109/COMSNETS.2017.7945431","DOIUrl":"https://doi.org/10.1109/COMSNETS.2017.7945431","url":null,"abstract":"In this paper we address the problem of decision making for transporters in an online freight exchange platform. Two properties of online freight exchange makes the decision making challenging for a transporter — highly competitive nature of the market and, uncertainty in availability of consignments. Additionally the driver's return to the home location within a predefined duration is yet another challenge in the decision making process. In order to secure a contract to carry a consignment, a transporter needs to take part in an online auction process. So a transporter needs to take the decision whether to bid for a consignment from the set of available consignments or to wait for some time in order to get a better consignment. We develop an algorithm which recommends the best decision prior to taking part in such an auction. The evaluation results of the proposed algorithm achieves maximized profits and within a pre-decided duration of time — from home location to destination(s) and again back to home — as set by the driver. It also performs better in terms of our objective function when compared with a naive greedy decision making algorithm.","PeriodicalId":168357,"journal":{"name":"2017 9th International Conference on Communication Systems and Networks (COMSNETS)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114801012","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 : 1900-01-01DOI: 10.1109/COMSNETS.2017.7945353
S. Jayasimha, Jyothendar Paladugula, Aditya Varma Gadiraju, Manoj Kumar Medam
A satellite-based Automatic Identification System (S-AIS) receiver has a high probability of message collisions, both in time and in frequency, for a zone densely populated by AIS-enabled ships. Banks of time-and-frequency selective detectors (that use message fields from un-collided messages from the same ship-track together with interference cancellation) decode collided messages. Algorithms are suited for on-board processing, with enhanced message and ship detection probability.
{"title":"Satellite-based AIS receiver for dense maritime zones","authors":"S. Jayasimha, Jyothendar Paladugula, Aditya Varma Gadiraju, Manoj Kumar Medam","doi":"10.1109/COMSNETS.2017.7945353","DOIUrl":"https://doi.org/10.1109/COMSNETS.2017.7945353","url":null,"abstract":"A satellite-based Automatic Identification System (S-AIS) receiver has a high probability of message collisions, both in time and in frequency, for a zone densely populated by AIS-enabled ships. Banks of time-and-frequency selective detectors (that use message fields from un-collided messages from the same ship-track together with interference cancellation) decode collided messages. Algorithms are suited for on-board processing, with enhanced message and ship detection probability.","PeriodicalId":168357,"journal":{"name":"2017 9th International Conference on Communication Systems and Networks (COMSNETS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114557345","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 : 1900-01-01DOI: 10.1109/COMSNETS.2017.7945371
R. Tiwari, Siddharth Deshmukh
In this paper, we propose a maximum likelihood based estimation technique for accurately estimating the velocity of mobile users in Heterogeneous networks (HetNets). In HetNets, base station (BS) density around a particular user is more compared to the traditional cellular network, resulting in frequent handoffs for a better quality of service. However, if the mobility management is not efficient, there is always a high probability of handover failures, unnecessary handoffs and call drops. The accurate estimation of the velocity of mobile users is one of the most challenging task in mobility management. The proposed velocity estimation strategy is based on handoff count which occurs during a predefined time span. Here we model densely deployed BSs using random waypoint process (RWP) and analyse the statistics of handover count as a function of velocity, BS density, and time span. Using these statistics we first derive the Cramer-Rao lower bound (CRLB) and later we determine a maximum likelihood estimator (MLE), which is an asymptotic unbiased estimator. We validate our approach by simulation which show the tight closeness of MLE asymptotic variance with CRLB. In addition, our result illustrates that velocity estimation error decreases with increase in BS density and time span of handover count measurements.
{"title":"Maximum likelihood estimator for velocity estimation in HetNets based on handoff count","authors":"R. Tiwari, Siddharth Deshmukh","doi":"10.1109/COMSNETS.2017.7945371","DOIUrl":"https://doi.org/10.1109/COMSNETS.2017.7945371","url":null,"abstract":"In this paper, we propose a maximum likelihood based estimation technique for accurately estimating the velocity of mobile users in Heterogeneous networks (HetNets). In HetNets, base station (BS) density around a particular user is more compared to the traditional cellular network, resulting in frequent handoffs for a better quality of service. However, if the mobility management is not efficient, there is always a high probability of handover failures, unnecessary handoffs and call drops. The accurate estimation of the velocity of mobile users is one of the most challenging task in mobility management. The proposed velocity estimation strategy is based on handoff count which occurs during a predefined time span. Here we model densely deployed BSs using random waypoint process (RWP) and analyse the statistics of handover count as a function of velocity, BS density, and time span. Using these statistics we first derive the Cramer-Rao lower bound (CRLB) and later we determine a maximum likelihood estimator (MLE), which is an asymptotic unbiased estimator. We validate our approach by simulation which show the tight closeness of MLE asymptotic variance with CRLB. In addition, our result illustrates that velocity estimation error decreases with increase in BS density and time span of handover count measurements.","PeriodicalId":168357,"journal":{"name":"2017 9th International Conference on Communication Systems and Networks (COMSNETS)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123675650","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}
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