name: PN
full_form: Pseudo Noise
context: Shown in Figure 5.4.3.2.4-1, AG for UE1 deactivation will take effect in E-DCH TTI1. AG for UE2 activation will take effect in E-DCH TTI2. Therefore, a gap in E-DCH TTI1 is introduced. Figure 5.4.3.2.4-1: gap description using legacy E-AGCH In order to solve the time gap problem described above, we redefine the E-AGCH taking effect time when it is used for deactivation. E-AGCH used for deactivation UE takes effect one TTI earlier than its legacy time. As shown in Figure 5.4.3.2.4-2, AG for UE2 activation takes effect in E-DCH TTI1, the same timing with legacy. AG used for UE1 deactivation takes effect in E-DCH TTI1 too, one TTI earlier than its legacy time TTI2. By using this new timing, there is no gap between users when switching happens. In addition, deactivation requires no data preparation (such as E-TFC selection, transport channel processing etc.) in UE side, thus the proposed scheme has very little influence on the UE process capability. Figure 5.4.3.2.4-2: new E-AGCH timing
description: Pseudo Noise (PN) is a noise-like signal used in telecommunication systems, particularly those defined by 3GPP specifications. It plays a crucial role in spreading and despreading data in CDMA-based systems, enabling multiple users to share the same frequency band efficiently. PN sequences are also involved in calculating energy per chip for different channels like CPICH (Common Pilot Channel) and DPCH (Dedicated Physical Channel).
explanation: PN is classified as Technology because it represents a specific technique or method employed within telecommunication systems. Its application in spreading data, calculating energy per chip, and enabling efficient frequency sharing highlights its technological nature.
section_title: 3.2	Symbols
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