CDMA2O00-1X分组数据业务——PDSN(上)

随着笔记本电脑和掌上电脑的广泛使用,研究移动IP已成为通信界的一个新热点。在IMT-2000中明确规定了3G必须支持移动IP业务,而即将推出的CDMA-1X则率先支持移动IP业务。

中国联通向CDMA 1X冲刺

对于中国联通来说,CDMA 1X已不仅仅被看作是窄带CDMA向3G演进过程中的一个必然阶段,它更被看作是有效激活CDMA市场的“催化剂”和带动无线数据业务发展的“引擎”,被看作是显示自身优势并与GPRS抗衡的“利器”。因此,虽然CDMA 1X尚未登台亮相,但它已经吸引了人们关注和期待的目光。

3G与2G网络优化关联性影响探索

3G网络和2G网络在物理设备和资源上存在多处共享的设置,且终端在2G与3G网络间存在互操作,两个网络的关联性会对网络质量产生潜在的影响。本文通过深入分析并结合实际案例,为3G与2G网络关联性影响的探索开辟了一条崭新的途径,为提升网络质量和客户感知水平,增添新的优化举措。

Yankee Group Ranks ZTE 2nd Best in CDMA Competitiveness

ZTE Corporation announced on March 31, 2008 that it has been ranked second in terms of CDMA equipment competitiveness by the Yankee Group in a report entitled "ZTE Shines in CDMA Market" published by the research firm in February this year. According to the report, ZTE is the most competitive telecom vendor in China, India, emerging Asia-Pacific market, Africa and Eastern Europe. ZTE tallied the highest score in four out of seven categories the Yankee Group used to measure the CDMA competitiveness of each vendor. The seven key evaluation factors were price, technology, existing installed base, product portfolio, integration capability, government support and company culture.

ZTE Wins World’s First CDMA EV-DO Rev.B Phase 2 Commercial Contract from Sistema Shyam TeleServices Ltd

ZTE Corporation announced on May 18, 2011 that it has won the world＇s first CDMA EV-DO Rev.B Phase 2 commercial contract from Indian telecom operator,Sistema Shyam TeleServices Ltd （SSTL）. SSTL operates its telecom services ac＇ross India under the brand MrS and has over 11 million wireless customers. ZTE has also won the CDMA expansion contracts and EV-DO upgrade contracts for 10 circles of SSTL. The EV-DO Rev.B Phase 2 commercial launch will commence in Raiasthan.

CDMA 2000标准制式的移动IP协议分析

随着IPv6标准的成熟和试运行,在3G牌照下发之际,能提供随时随地的移动数据通信已成为人们的迫切需求。通过移动IP协议,移动主机可以通过一个永久的IP地址连接到任何链路上,移动主机移动后仍可以保持正常通信。为了探讨移动IP协议在运营商级商用的技术可行性,文中通过剖析移动IP协议的工作原理及主要技术特点,就移动IPv6在CDMA 2000网络中的系统结构、协议模型、路由方式及存在问题进行了探讨。