【In the forthcoming years,Beyond-3G(B3G) environments will undoubtedly be deployed in most parts around the globe, permitting a world class solution for network interconnection, A B3G context enables the efficient cooperation of existing wireless technologies, including cellular-based(e.g. 2G/3G), broadcast-oriented(e.g. DVB)-in specific DVB-H, and Internet-based(WLAN/WMAN)networks, all relying on enhanced IP as the unifying layer. Hence, in this particular and yet to be deployed environment, mobile, systems and platforms will permit to provide enhanced services to all applications across heterogeneous access networks. This will effectively enlarge the scope of service deployment, availability and accessibility to the users】 Based on the paragraph above, it is shown that (98) will be used as the higher layer protocol to unify cellular networks ,broadcast networks and (99) networks, which is enabled by the context of (100).

A. mobile systems and platforms

B.3G

C.heterogeneous access networks

D.enhanced IP

衡量数字传输系统传输效率的指标是（）。

A.bit/s/Hz

B.bit/s

C.Baud

D.Hz/s

A、切换和RNC迁移等移动性管理功能;

B、提供PS域的路由转发、鉴权和加密等功能;

C、完成呼入呼叫的路由功能及与固定网等外部网络的网间结算功能;

D、宏分集合并、功率控制、无线承载分配等无线资源管理和控制功能;

E、执行系统信息广播与系统接入控制功能。

用户终端到交换局之间的用户线上传送的信令都可归为（）。

A.用户线信令

B.局间信令

C.前向信令

D.后向信令

此题为判断题(对，错)。