UC知道翻译 急用 在线等11
来源：百度知道 编辑：UC知道 时间：2024/05/22 14:05:50
Using flexible UMTS bearers, especially at
the radio interface, is essential to establish
UMTS as a multiservice network. It requires
omnipresent radio consisting of hierarchical
cells. Spectral efficiency has to be improved significantly
to overcome bandwidth and capacity
limitations of second-generation radio. A major
objective is to offer simultaneous data rates from
narrowband up to wideband, optionally in combination
with symmetrical or asymmetrical transmission.
UMTS has to support all kinds of
traffic, from real-time voice traffic to bursty data
traffic, including mixed multimedia traffic.
True global service availability (i.e., also in
maritime and aeronautic areas) is not possible
without a satellite constellation. Therefore, a
satellite component is planned as integral part of
UMTS to complement the terrestrial segment.
As Satellite UMTS (S-UMTS) completes and
extends the coverage o
the radio interface, is essential to establish
UMTS as a multiservice network. It requires
omnipresent radio consisting of hierarchical
cells. Spectral efficiency has to be improved significantly
to overcome bandwidth and capacity
limitations of second-generation radio. A major
objective is to offer simultaneous data rates from
narrowband up to wideband, optionally in combination
with symmetrical or asymmetrical transmission.
UMTS has to support all kinds of
traffic, from real-time voice traffic to bursty data
traffic, including mixed multimedia traffic.
True global service availability (i.e., also in
maritime and aeronautic areas) is not possible
without a satellite constellation. Therefore, a
satellite component is planned as integral part of
UMTS to complement the terrestrial segment.
As Satellite UMTS (S-UMTS) completes and
extends the coverage o
使用灵活的UMTS 持票人, 特别是在 无线电接口, 是根本建立 UMTS 作为multiservice 网络。它要求 无所不在收音机包括等级制度 细胞。鬼效率必须显著被改进 克服带宽和容量 第二代收音机的局限。一个少校 宗旨将提供同时数据速率从 窄带由多种频率决定, 任意地在组合 以对称或非对称传输。 UMTS 必须支持各种各样 交易, 从实时声音交通对bursty 数据 交易, 包括混杂的多媒体交通。 配齐全球服务可及性(即, 还 海和航空区域) 不是可能的 没有卫星星座。所以, a 卫星组分计划作为整体部分 UMTS 补全地球段。 当卫星UMTS (S-UMTS) 完成和 延长地球UMTS 覆盖面, 全球性 intrasystem 漫游变得可能。数 S-UMTS 的另外的角色被考虑了, 象灾害证明可服务性, 迅速 UMTS 的全球性部署services/applications, 并且卸货地球交通 减少阻拦可能性。