name: CP
full_form: Control Plane
context: Currently the Iub and Iur interfaces need to be terminated in the DRNC. The consequences for the DCH Frame Protocol are shown in figure 2: Figure 2: ATM-based DRNC DCH FP stack in R99/Rel-4 The functions of the CPS and SSSAR layer are shown in figure 3 (based on [2]). As can be seen in figure 3, a large FP frame will be segmented by the SSCS layer, and then multiplexed in ATM cells by the CPS layer. When receiving an FP frame, the reverse will take place: demultiplexing in CPS layer and re-assembly of the FP frame in the SSCS layer. Figure 3: Example of CPS/SSCS functionality In the DRNS, a complete FP frame will have to be re-assembled before it can be forwarded on the next interface. Especially in the case of low/average speeds on both Iub and Iur this will generate considerable additional delay. E.g. if both Iub and Iur are a 2Mbps interface, for a 384kbps transport channel with a 40ms TTI, an additional minimum delay of 7.68ms will be inserted. Note this figure does not include any
description: The Control Plane (CP) is a protocol responsible for managing and controlling the flow of data between different network elements. In this context, CP governs the transmission and reception of data in the downlink shared channel (DL-SCH). The length of the CP, which can be short or long, determines the timing and structure of OFDM symbols within a sub-frame.
explanation: The text refers to 'CP length' and 'CP length allocation', indicating that CP is a set of rules governing data transmission, classifying it as a protocol.
section_title: 7.1.2.4.2	Structure in time
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