结合手机定位与数字地图传送功能,对J2ME开发平台下基于手机定位实现便携式移动导航系统进行了研究,提出了可行的解决实现方案。利用手机提供的基于位置服务功能LBS(Location Based Server),通过无线通信网络传送用户所在区域的数字地图...结合手机定位与数字地图传送功能,对J2ME开发平台下基于手机定位实现便携式移动导航系统进行了研究,提出了可行的解决实现方案。利用手机提供的基于位置服务功能LBS(Location Based Server),通过无线通信网络传送用户所在区域的数字地图,为用户提供定位、导航、服务等多种相关的信息。整个系统由无线移动终端、数字地图服务器、网关3部分组成,通过在手机中内嵌J2ME-MIDP,让手机端可以提供更新准确的定位服务,地图服务器和网关建立在传统的以太网络上,可以有效地减少网络通信的时间,降低系统复杂度。实验中以浙江大学校园地图为例,结合WAP Push技术和手机定位功能,成功地实现了手机导航的功能。展开更多
In this paper we look at different push messaging alternatives available for Android. Push messaging provides an important aspect of server to device communication, and we specifically focus on the integration of clou...In this paper we look at different push messaging alternatives available for Android. Push messaging provides an important aspect of server to device communication, and we specifically focus on the integration of cloud computing with mobile devices through the use of push-based technologies. By conducting a benchmarking test, we investigate the performance of four relevant push technologies for the Android platform, namely C2DM, XMPP, Xtify and Urban Airship. The comparison focuses on three aspects of the libraries: 1) The stability;2) Response times;and 3) Energy consumption. The test is conducted on both WLAN and 3G, and includes several mobile device types. Additionally, we also integrate with the Google App Engine to provide the cloud integration server that is responsible for sending push messages to the mobile devices.展开更多
文摘结合手机定位与数字地图传送功能,对J2ME开发平台下基于手机定位实现便携式移动导航系统进行了研究,提出了可行的解决实现方案。利用手机提供的基于位置服务功能LBS(Location Based Server),通过无线通信网络传送用户所在区域的数字地图,为用户提供定位、导航、服务等多种相关的信息。整个系统由无线移动终端、数字地图服务器、网关3部分组成,通过在手机中内嵌J2ME-MIDP,让手机端可以提供更新准确的定位服务,地图服务器和网关建立在传统的以太网络上,可以有效地减少网络通信的时间,降低系统复杂度。实验中以浙江大学校园地图为例,结合WAP Push技术和手机定位功能,成功地实现了手机导航的功能。
文摘In this paper we look at different push messaging alternatives available for Android. Push messaging provides an important aspect of server to device communication, and we specifically focus on the integration of cloud computing with mobile devices through the use of push-based technologies. By conducting a benchmarking test, we investigate the performance of four relevant push technologies for the Android platform, namely C2DM, XMPP, Xtify and Urban Airship. The comparison focuses on three aspects of the libraries: 1) The stability;2) Response times;and 3) Energy consumption. The test is conducted on both WLAN and 3G, and includes several mobile device types. Additionally, we also integrate with the Google App Engine to provide the cloud integration server that is responsible for sending push messages to the mobile devices.
