Collaborative Service Models for mobile devices in SrMC

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1 Collaborative Service Models for mobile devices in SrMC 1 Sumi Song, 2 YongIk Yoon 1, First Author Multimedia Science, Sookmyung Women s University, Seoul, Korea, songsm0328@naver.com *2,Corresponding Author Multimedia Science, Sookmyung Women s University, Seoul, Korea, yiyoon@sm.ac.kr Abstract Collaboration between mobile devices is again attracting attention because mobile devices are getting more powerful and more widespread. In addition, Cloud Computing technology is being applied to mobile devices. A variety of tasks is made possible despite the technical limitations. Also, the Cloud can be treated as a virtual space between devices. So, each of the mobile devices can share their own superfluous resources in the Cloud. It is expected to be a good solution for preventing the waste of IT resources and increasing working efficiency. So, in this paper, models of collaboration with mobile cloud are proposed to equip environment with cooperative work and group service. We expect that this proposition will be a help in understanding the mobile cloud collaboration. Keywords: Mobile Cloud; Collaboration; Mobile Cloud Application, smart service model. 1. Introduction Users can similarly work for their desired actions with mobile devices like using personal computer(pc) [2][7]. But it is a fact that mobile devices still do not have enough computing power and application abilities because they still have many limitations such as small size, heavy weight, insufficient energy supply and etc. For solving this dissatisfaction, through collaboration, mobile devices are allowed to share IT resources. For the cooperation with mobile devices, the cloud computing can be more a systematic and reliable tool. The mobile devices connect to service cloud(scs) individually for getting service data or saving own device information. This means that different mobile devices can be managed in cloud. Then, devices can be is stuffed needful abilities by collaborative action with near devices. Through collaboration, we expect to increase of performance and capability of a single device. Also if users have group work, this work can be performed easier and more efficiently because the users are able to share their progress in mobile cloud. For this reason, in this paper, we propose a collaborative service model for sharing the resources between mobile devices. It is not simply about making connections with mobile devices. New models of collaboration with mobile cloud aim to reduce the burden within a productive working relationship and rationality. 2. Main Issues for Collaborative mobile Service 2.1. Mobile Cloud service Interworking The mobile cloud service interworking can be defined as services that can allow sharing various contents across multiple mobile devices in real time [3]. In other words, users can take advantage of the resources and the variety of content with their owned devices through a connection with cloud server. The same content can be enjoyed on multiple devices. Thus, many services are being provided on the interworking such as (1) synchronization service (Apple Mobile Me, Google Google Sync, Microsoft My Phone, LG U +, etc.), (2) streaming service (SK Hoppin in Korea) and (3) web storage service. A wider variety of service interworking studies have been performed. Also, the service interworking between mobile cloud and devices, between content and content as well as service and service in the cloud have attracted interest. And the approach from interworking to collaboration is to be expected Data Conversion Research Notes in Information Science (RNIS) Volume14,June 2013 doi: /rnis.vol

2 Users can be provided a variety of data and content, because they can overcome the limitations of mobile devices through mobile access to cloud. In addition to this, several actions that were previously only possible only on a stationary PC through a network connection became available in mobile devices. The searching with Google, Bing and Yahoo, NAVER, etc. and of course Twitter, Facebook, Flickr, and a variety of social networking services are also available in the mobile devices. Also, office infrastructure access is available through cloud with mobile devices and working within cloud may be performed. Moreover, application services such as navigation, LBS-based services are possible without large crowd. The Cloud has nearly infinite amount of services and nearly an infinite amount of space to store a lot of resources in. But the definition of a way to connect to the cloud, receive data and share the data is not clear. We cannot ignore the problem with the heavy traffic which is due to a lot of people accessing the cloud simultaneously. In addition, security problems which might occur in this process cannot be overlooked. Thus, various kinds of services as well as stable and efficient access methods and way of sharing data in cloud should be presented. In all of this process, the security technologies should be considered as essential Mobile Cloud service Interworking Mobile cloud has a big advantage in the collaboration between the mobile devices unlike existing clouds. Users have a large number of mobile devices instead of just one. This trend is expected to be increasing. In addition, communication mobile devices as well as the consumer serviced devices also have function of network. So, collaboration between several devices becomes much more expected using cloud. This is a technique for using mobile cloud and generating a small mobile cloud. It will be necessary that the clear definition and research for system about generating and maintaining of personal cloud via various devices. Also, studies for domain navigation of mobile cloud are worth exploring to represent N-screen and the fusion media. Likewise, resource discovery for cloud/device and device/device are issued. 3. Clarification of Collaborative mobile cloud The mobile cloud collaboration means that several devices take on supplementary work, because of the lack of features and resources within a local area network. To collaborative work, devices make small scale own network(srmc). In the SMC, devices can use mainly the newly generated cloud for their purposes, not already existing cloud based on server. The SrMC is new approaching about mobile cloud and will be a new model for mobile cloud. But the SrMC is connected to service cloud. In other words, the SrMC is a sub-cloud for collaborative work provisionally(see Fig.1). A system of mobile cloud collaboration is needed for the components to perform the cooperation efficiently. A coordinator of mobile cloud is required in order to maintain stability in a systematic manner. The coordinator mediates cooperation and is responsible for the monitoring/adjustment of devices. So, it becomes easy that a number of mobile devices can utilize IT resources of cloud server or other devices. And devices can perform the role of users and providers depending on the purpose of the usage. For collaborative mobile cloud, there are 3 roles: Mobile Cloud Resource Coordinator (below MCRC), Mobile Cloud Resource User (below MCRU) and Mobile Cloud Resource Provider (below MCRP). In case of the MCRC, it is assigned to the role at the time of formation of mobile cloud or running collaboration services in several devices Mobile Cloud VS SrMC Mobile Cloud Mobile cloud is a system that allows user to use IT resources such as server, storage and software with mobile devices. In short, it means that target of cloud service is changed from fixed device to portable device. In cloud, mobile devices can solve mechanical defects and work a variety of tasks during moving by using the mobile cloud API or a virtual device. 681

3 SrMC SrMC(Self-reliant Mobile Cloud) means independent networks between multiple devices. That is, devices can use mainly the newly generated cloud for their purposes, not already existing cloud based on server. In the SrMC, devices can share their own resources with requiring/offering and exchanging application services. Therefore, the SrMC is possible to be generated by various domains and members. In some cases, overlap devices exist between various the SrMC(figure 1) Roles for SrMC Figure 1. The SrMC with the MCRC MCRC(Mobile Cloud Resource Coordinator) The MCRC should search information about of the candidate devices for providing resources. The MCRC helps devices share their information of holding resources like customer and provider. So, it can be easy that devices connect each other and exchange for resource. In addition, the MCRC has responsibility to check and manage the status of devices which are in the SrMC during collaborative work. So, at point the end of the collaboration, the MCRC should update information about the SrMC status to service cloud MCRU( Mobile Cloud Resource User) MCRU means the device which has lack of IT resources and wants use resources of other devices. Even though the MCRU does not have functional defect, it wants to use resources depending on special work MCRP( Mobile Cloud Resource Provider) MCRP has a role of providing resources to user. The MCRP is not fixed. Device can be the MCRP when it receives request to provide its resources from other device. In other words, all devices may be providers depending of the request Steps of Mobile Cloud Collaboration For collaborative mobile cloud, the SrMC proceeds as 8 steps. The 8 steps were determined according to the order of signaling between 3 role parts(figure 2). Step 1: MCRU The MCRU realizes the necessity of using resources of another mobile device. 682

4 Step 2: MCRU MCRC The MCRU finds the MCRC and request information about providers which have the needed resources in near area or Self-reliant Mobile Cloud. Step 3: MCRC Service Cloud In this paper, we assume that there is database about managing information on mobile devices in a server. So, the MCRC checks status of devices and chooses suitable device after receiving request from the MCRU. Step 4: MCRC MCRU The MCRC sends the result of the search to MCRU. Step 5: MCRU MCRP If the MCRU can get the information about the provider to work, MCRU should explore the MCRP and request to supply resources. Step 6: MCRP If the request is accepted, the MCRP does the work or supply resources to the MCRU with a connection. Step 7: MCRU MCRC When the MCRU finishes receiving the supply of resource from the MCRP, it should report condition of collaboration to the MCRC. Step 8: MCRC Service Cloud The MCRC checks status of both the MCRU and the MCRP. Then, the results are saved in database in a service cloud for the next collaboration. Figure 2. The process of collaborative mobile service based on 8 steps 5. Resources of Mobile Cloud. Various kinds of devices have different resources. This point can be a big purpose of the mobile cloud collaboration. So, what kinds of resources are needed for collaboration? In this section, we present IT resources that can be requested in mobile cloud collaboration. The resources are divided into a total of five. 683

5 R1: Data & Media Contents Contacts, documents, videos, photos and all kinds of other material like simple data. R2: Data Storage A device has its own storage space. But small mobile device has a small amount of data storage compared to the fixed device (such as PC, Laptop, HDD). R3: Computing Ability & Energy for working Although computing power has been much improved for mobile devices, it is a fact that mobile device doesn t work in a stable manner. The R3 includes CPU specifications, taskswitching ability, speed of the Internet connection, batteries and so on in hardware side. Also, various software and platform are included. R4: Special Function All devices have certain features that can be provided, such as camera, microphone, speaker, recorder, GPS system, light and so on. R5: Mobile Office The R5 is Environment for collaborative work. This is not special resource but a clear purpose for the cooperation. Several users use this resource for group working or temporary collaboration. 6. Conclusion & Further Study In this paper, we proposed five models of collaborative mobile cloud. Until now, definitions of mobile cloud and collaboration of mobile cloud have not been defined. So, we try to define mobile cloud which is not dependent on server cloud fully, five components of mobile cloud and five IT resources for collaboration. In the mobile cloud we proposed, devices do not only use server cloud service but also share their own cloud and IT resources. Users can make a self-reliant mobile cloud without Internet connection with server cloud and do various cooperative work with each other. We propose concepts of models for collaborative mobile cloud, but we plan that generating of main technical function and requirements for mobile cloud collaboration is needed. So, we expect that our study will be help to set standardization of mobile cloud collaboration and be good assistant for service model. Acknowledgement This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education, Science and Technology( ). 7. References [1] Sun MicroSystems, Inc., Introduction to CLOUD COMPUTING ARCHITECTURE, [2] Sarah Perez, "Why Cloud Computing is the Future of Mobile, [3] Huang, Dijiang. "Mobile cloud computing." IEEE COMSOC Multimedia Communications Technical Committee (MMTC) E-Letter 6.10 (2011): [4] J. S. Lee and other one person, Traveling abroad and the prospects Cloud Computing, Proc. of Information Processing Society In Korea, Part 2 of 16, pp. 17~ [5] Nicole, R. "Title of paper with only first word capitalized." J. Name Stand. Abbrev (1987): [6] Yoon, Changwoo, et al. "Dynamic collaborative cloud service platform: opportunities and challenges." ETRI journal 32.4 (2010): [7] Gadea, Cristian, et al. "A Collaborative Cloud-Based Multimedia Sharing Platform for Social Networking Environments." Computer Communications and Networks (ICCCN), 2011 Proceedings of 20th International Conference on. IEEE,