ITR: A New Generation Wireless System with Integrated Cellular and Mobile Relaying Technologies

随着互联网的出现，现在预计无线数据服务将在几年内超过语音服务的需求。对无线数据服务的爆炸性需求正迫使电信和网络研究团体重新考虑一些众所周知的解决方案，以解决此类网络中基本的有限容量问题。本文提出了一种解决当前无线系统容量有限问题的新概念，并描述了一种经济有效的实现方法。研究人员的主要概念是，通过“跳”到工业、科学和医疗频段（ISM） （2.4 - 2.5 GHZ）等未授权频段的频率，并将流量转移到非拥堵区域，从而避免蜂窝网络中的拥堵。研究人员建议通过部署称为移动中继站（MRS）的新设备来集成蜂窝和移动中继技术。有了MRS，移动主机可以通过切换（或“跳频”）到未授权的频段，与位于不同小区的基站收发台（BTS）进行通信。通过这种方式，移动到拥塞小区的移动主机可以继续其呼叫，否则将被丢弃；同样，通常在拥塞小区中被阻塞的新呼叫可以通过中继从附近小区借用信道来提供服务。从而大大提高了现有蜂窝系统的切换丢失概率和新呼叫阻塞概率。这反过来又会导致这些系统的用户数量（即容量）的空前增加，如果将提出的新概念与小区分裂结合使用的话。虽然提议的下一代无线系统的硬件复杂性将略高于传统系统，但在任何时候，在改进网络性能、容量和连接方面的预期收益将远远超过硬件复杂性的略微增加。该项目的成功可能会导致下一代无线网络标准的重大范式转变。预计该项目还将加强纽约州立大学布法罗分校的电信和网络教育和研究项目，并为建立一个高级电信和网络中心铺平道路，该中心将容纳来自电气工程系、计算机科学与工程系以及其他系的教师和研究生。

With the advent of Internet, it is now anticipated that wireless data services will within a few years surpass the demand for voice services. The explosive demand for wireless data services is forcing the telecom and networking research communities to rethink some of the well-known solutions to the limited capacity problem which is fundamental in such networks. In this proposal, a new concept for solving the limited capacity problem in current wireless systems is formulated, and a cost-effective approach to implement the concept is described. The researchers main concept is to circumvent congestions in cellular networks by "hopping" to frequencies in the unlicensed band, such as the Industrial, Scientific, and Medical Band (ISM) band (2.4 - 2.5 GHZ) and by diverting traffic to noncongested areas. The researchers propose to integrate cellular and mobile relaying technologies by deploying new devices called mobile relaying stations (MRS's). With MRS's, a mobile host can communicate with the base transceiver stations (BTS's) located in a different cell by switching (or "hopping") to the unlicensed frequency band. In this way, a mobile host moving into a congested cell can continue its call that would otherwise be dropped; likewise, a new call that would normally be blocked in a congested cell could be served by borrowing channels from a nearby cell via relaying. As a result, handoff-dropping probability and new call blocking probability of existing cellular systems can be substantially improved. This, in turn, leads to an unprecedented increase in the number of users (i.e., capacity) of these systems if one utilizes the proposed new concept in conjunction with cell splitting. While the hardware complexity of the proposed next-generation wireless systems will be slightly higher than that of the conventional systems, the anticipated benefits in terms of improved network performance, capacity, and connectivity at all times will far outweigh this slight increase in hardware complexity. The success of this project could lead to a major paradigm shift in the next-generation wireless network standards. It is also anticipated that this project will enhance the telecommunications and networking education and research programs at the State University of New York at Buffalo, and could pave the way for a Center for Advanced Telecommunications and Networking that houses faculty and graduate students from the Department of Electrical Engineering, Department of Computer Science and Engineering, as well as other departments.