全文获取类型
收费全文 | 128篇 |
免费 | 5篇 |
国内免费 | 4篇 |
专业分类
电工技术 | 2篇 |
综合类 | 2篇 |
建筑科学 | 1篇 |
武器工业 | 1篇 |
无线电 | 77篇 |
一般工业技术 | 1篇 |
自动化技术 | 53篇 |
出版年
2023年 | 1篇 |
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 3篇 |
2019年 | 1篇 |
2018年 | 2篇 |
2016年 | 4篇 |
2015年 | 3篇 |
2014年 | 10篇 |
2013年 | 9篇 |
2012年 | 10篇 |
2011年 | 8篇 |
2010年 | 11篇 |
2009年 | 10篇 |
2008年 | 14篇 |
2007年 | 11篇 |
2006年 | 5篇 |
2005年 | 8篇 |
2004年 | 4篇 |
2003年 | 8篇 |
2002年 | 4篇 |
2001年 | 2篇 |
1999年 | 2篇 |
1998年 | 2篇 |
1993年 | 3篇 |
排序方式: 共有137条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
蜂窝移动系统的越区切换对TCP拥塞控制产生了影响,使Reno与New Reno在越区切换过程中性能下降。通过仿真发现了移动切换中“平静间隙”和“NewReno低效重传”2种有价值的TCP拥塞控制现象。利用了TD—SCDMA的移动趋势预测能力,及接力切换先建立新基站信令连接,后断开旧基站业务连接的特点,提出了一种“预复制”机制。仿真结果表明该机制可以提高蜂窝切换过程中TCP的传输效率。 相似文献
5.
随着网络宽带用户的快速增长与信息技术的迅速发展,人们对新兴媒体业务和和终端移动性的需求日益增长。对于如何在移动终端上有效的开展多媒体业务,逐渐成为第三代网络发展进程中一个亟待解决的问题。文章在对移动IP组播技术和手机电视业务研究分析的基础上,提出一个应用移动IP组播技术的手机电视系统的构想和应用模型。这一架构将为今后的移动多媒体业务开展提供技术支撑。 相似文献
6.
7.
8.
Mehmet Akar 《Wireless Networks》2009,15(6):691-708
In this paper, joint downlink power control and handoff design is formulated as optimization problems that are amenable to
dynamic programming (DP). Based on the DP solutions which are impractical, two new algorithms suitable for next generation
wireless networks are proposed. The first one is an integrated hard handoff/power control scheme that endeavors a tradeoff
between three performance criteria: transmitted power, number of handoffs, and call quality. The second is a soft handoff/power
control algorithm that also takes into account the additional cost of utilizing soft handoff. The proposed algorithms present
a paradigm shift in integrated handoff/power control by capturing the tradeoff between user satisfaction and network overhead,
therefore enjoy the advantages of joint resource allocation, and provide significant improvement over existing methods. The
achievable gains and the tradeoffs in both algorithms are verified through simulations.
相似文献
Mehmet AkarEmail: |
9.
Dimitrios N. Skoutas Saied M. Abd El-atty Angelos N. Rouskas 《International Journal of Wireless Information Networks》2008,15(2):98-104
A key performance indicator of mobile wireless networks is failure probability of handover calls. In this paper, we propose
a Call Admission Control policy which prioritizes handover calls over new calls in WCDMA systems. The OVSF code occupancy
of the system is modeled by a Markov chain and the differentiation between handover and new calls is performed at the code
level by introducing a “guard code” scheme. The scheme belongs to the well-known family of guard channel schemes and reserves
some code capacity to favor the continuation of handover calls over the new calls. As the management of the general case is
intractable, we solve certain numerical instances of the problem and manage to calculate several performance metrics like
new call blocking and handover failure probabilities and code utilization. We complete our study with simulation results in
the case of higher OVSF code tree capacity.
相似文献
Angelos N. RouskasEmail: |
10.