REVEIW ON: LOCATION BASED SERVICES IN ANDROID

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1 REVEIW ON: LOCATION BASED SERVICES IN ANDROID Prachi kohade 1, Prof.Makarand Shahade 2 1 Prachi kohade, Information technology, JDIET, yavatmal, India, prachikohade@gmail.com 2 Prof. Makarand Shahade, Information Technology, JDIET, yavatmal, India, makarand_shahade@rediffmail.com ABSTRACT The service which provides the users a set of services which originate from the geographic location of the user s mobile device are called as Location based services. By using these services it is possible for the users to find and locate other persons, vehicles, resources and also to provide location-sensitive services, in addition to tracking their own location. Mobile user can retrieve the information about their current location and process that data to get more useful information near to their location by using location based services. In mobile device or in another entity like application provider or network operator the request for location can be originated. When the mobile device is at a particular location it is possible to automatically trigger Location Based Services. These services can also originate in the user s mobile device itself in order to satisfy location-based requests like finding areas of interest, checking traffic conditions, finding our friends, vehicles, resources, machines and emergency requests. With the aid of A-GPS in phones and through Web Services by means of GPRS, Location based Services can be implemented on Android based cell phones to provide these value-added services: giving routing information, helping them searching nearby hotels. Keywords: Android, Location based service, Location Manager, Location Provider, GPS, A-GPS INTRODUCTION In the month of November of the year 2007 Android SDK was released by Open Handset Alliance. Android was actually developed using the kernel of Linux 2.6 and it has some highlighting feature which includes the following: Licensing is free, distribution and release approval. GSM, 3G EDGE networks. Stores shared data. Passing IPC message. GPS position locator. It has complete multimedia hardware control. The Location Based Service (LBS) applications helps mobile user to find hospitals, school, gas filling station or any other facility of interest indicated by user within a particular range. Android is considered as a unified software package. This software package consists an operating system, middleware and core applications. Some tools and API s provided by Android SDK which are required to develop Android applications by using the programming language of Java. Android platform gives open system architecture with a powerful debugging environment. It has optimized graphics systems, high media support and an inbuilt web browser. Location based Services is classified in 2 parts- a) Safety of public / Services in Emergency: The location of the client can be resolute by the mobile carrier thus it finds great utilization during Emergency hence it can be used during the emergency/health hazard to position the mobile clients. b) Services for Consumer: Now days, smart phones like (Android, Blackberry and iphone) grant a set of location based applications and services which helps the users to perform the multiple services based on the user position.

2 It fixes the position within second. It has better coverage and can be used inside the buildings, which consumes less battery power and requires lesser satellites. 2. LITERATURE REVEIW Within last few years, the smart phones like Android, Black berry and iphone have taken over the market of Nokia based Symbian Phones in India. And these smart phones capable with A-GPS functionality which has the spatial coordinates of the user location. Android's Network Location Provider figure outs user location using cell tower and Wi-Fi signals, gives location information in a way that works indoor and outdoor, responds faster, and consumes less battery power. Assisted GPS which also known as A-GPS or AGPS, it improves the presentation of paradigm GPS in devices connected to the wireless network. A-GPS enhances the position granularity of smart phones (and other connected devices) in two ways: It helps in finding a faster "time to first fix" (TTFF). A-GPS gets and stores data about the position of satellites by the cellular network thus the data does not need to be downloaded through satellite By serving position mobile device when GPS signals are not strong or not present. By tall towers GPS satellite signals may be impeded, and they do not go through building interiors well. A-GPS uses closeness to cellular towers to compute location when GPS signals are not available. It addresses signal and wireless network trouble by using support from other services. Such a technology in our cell phones can help in various ways like tracking current position, receiving onr-by-one direction instructions, direction tracking, etc. A-GPS takes aid from GPRS and at times, the service provider network in order, to locate the current location accurately. Fig-1: A-GPS Architecture A-GPS reduce the amount of memory and hardware that should be integrated into mobile devices in a way to provide GPS-quality device locating facility as required by mobile devices. It keeps the mobile device simple and allows more battery time.gps is immediate solution provider whereas AGPS is not. The network is required every time as we move out of the service area. It used only for locating a particular place within a small area. There is no confidentiality in GPS and A-GPS as the Assistance server knows the position of the device. 2.1 LBS COMPONENTS To make LBS services possible, some infrastructure elements are essential including mobile devices, applications, communication network, locating component, and service servers. For sending requests and retrieving results mobile devices are tools used by users to access LBS services. This devices are portable navigation devices (PNDs), Personal Data Assistants (PDAs), laptops, mobile phones, etc.

3 Fig-2: LBS Components There is specific application developed for a specific LBS service. owing to the limitations of mobile devices (small screen size, limited processor power and memory, battery capacity), LBS applications should be lightweight and battery saving. A positioning component is usually required in a LBS application to determine the position of user's mobile device Global Positioning System(GPS) The Global Positioning System (GPS) is a space-based satellite routing system which provides location and time data in various weather conditions, wherever on or near the Earth where there is an unhindered line of sight to four or more GPS satellites. The system gives critical capabilities to military, civil and commercial mobile users across the world. United States government maintains this system and it is freely accessible to anyone with a GPS receiver.gps is used by civilians as a routing system Design of location Based Service(LBS) Location based services is an sunshade term used to describe the various technologies used to find the current location of a device. LBS includes some main elements they are: Location Manager Location Provider Location Manager acts as a clasp to LBS. Every Location providers represents a different location searching technology used to find the current location of a device. It performs following tasks: Finds the current location Track the movement It sets proximity alerts for specified locations Checks all the available location providers

4 Fig-3: Finding our location GPS provider and Network provider are the most common location providers. It is accessed by using the static string constants mentioned below Location Manager. GPS_PROVIDER Location Manager. NETWORK_PROVIDER 3.PROPOSED WORK AND METHODOLOGY Location-based service is an another key functionality which is used in smart phone applications. LBS is often combined with maps for a good experience to the user about their location. LBS Application Programming Interfaces (APIs) [7] is supported by android. In this application user can also register a target receiver for proximity alerts like when the device is entering and existing within a particular area of given longitude, latitude as well as radius. 3.1 Location API in Android There are the different classes present in Location API package to regain the Location information of the user. Location Manager Location Provider Location Listener Criteria 3.2 Google Places API Google I/O developer Conference in San Francisco on 10 May, 2011, Google declared the opening up and general accessibility of the Google Places API. Within this there are 4 essential Place services are available: Place Searches

5 Place Details Place Check-ins Place Reports 3.3 API for Public Transportation The Public Transit API by Walk Score provides the Transit Score for any location listed with in its record and provides suitable access to close by public transit stops. The use of Public Transit Services are: Within the application transit score is added. Public transit stoppages are viewed on a map. To analysis the fine points about close by transportation routes Proximity Alerts Fig-4: Proximity Alert 4. CONCLUSION Location Based Services provide both information and entertainment accessible with mobile devices through the mobile network. It utilizes geographical position of the mobile device. They also use multiple techno satellite network, cellular networks, Wi-Fi networks and other technologies. LBS has another excellent feature that is the context awareness. In the development of the application, it provides separate methods and classes for each and every separate entity. Location Based Services, has variety of aspects which helps the mobile users and thus it has a more scope of development in future.

6 REFERENCES [1] Android Wireless Application Development By Shane Condor and Lauren Darcy. [2] GPS Signal Acquisition and Tracking An Approach towards Development of Software based GPS Receiver By Dinesh Manandhar, Yongcheol Suh, Ryosuke Shibasaki. [3] Amit Kushwaha, Vineet Kushwaha Location Based Services using Android Mobile Operating System International Journal of Advances in Engineering & Technology, IJAET ISSN: [4] Manav Singhal, Anupam Shukla Implementation of Location based Services in Android using GPS and Web Services IJCSI International Journal of Computer *Science Issues, Vol. 9, Issue 1, No 2, January 2012 ISSN (Online): [5] Schwinger, W., Grin, C., Prll1, B., and Retschitzegger, W. A light-weight framework for location-based services. In Lecture Notes in Computer Science (Berlin, 2005), Springer, pp. 206_210