The chapter focuses on the changeover of some RRM functions including the packet scheduler into NodeB. The alterations in RRM capabilities with the network nodes brought about added modifications of HSDPA air interface like introduction of greater‐get modulation and coding schemes, and modification from the MAC protocol architecture for enabling the rapidly scheduling within the BTS.
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It organizes technology and company procedures into levels outlined by actions taking place, and it outlines how an enterprise can set up an interface to speak amid these layers.
The signaling concept fragments are pieced together during the LAC, in which finish signaling messages are handed on to Layer 3.
抗干扰能力 ：通过扩展信号频谱，减少了信号的能量密度，提高了信号对噪声和干扰的抵抗力。
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What's more, it helps manufacturing click here personnel and data technological innovation (IT) personnel collaborate by analyzing vital terms for integration tasks — and decreases the danger, Expense and errors linked with applying them.
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So in power control system transmitter nearer get more info to the base station transmits less ability signal that from the transmitter farther. It is actually of two sorts:
灵活性高： 多载波系统能够更容易适应不同的数据速率和带宽要求，提供更加灵活的服务。
Error Correction and Quality of Support (QoS): EVDO incorporates mistake correction techniques to make sure the integrity of data for the duration of transmission, even in conditions with signal interference or sound.
It is actually identical to 56K modem that is able to provide a greater speed of data within the downstream path than within the upstream path. That is the reason why its identify is Asymmetric DSL. It divides bandwidth unevenly