name: CH
full_form: Channel
context: The radio link can be in one of the following three modes: - Normal mode : No timing control, UE discrimination by Scr code - USTS mode : Timing control, UE discrimination by both Scr and Ch codes - Non-USTS mode : No timing control, UE discrimination by both Scr and Ch codes The difference between Normal mode and Non-USTS mode is as follows. If one of the radio links to the cell sites in Active set is in USTS mode, it is discriminated by both scrambling code and channelisation codes assigned for USTS mode in all cells in Active set. Therefore, the other links should be in non-USTS mode. This is because the UE has only a single transmitter and there can be more than one UEs who enter the SHO region from the same original cell and accordingly, they use the common scrambling code and the discrimination can be done only by channelisation codes. The UE in USTS mode has an USTS-mode RL and non-USTS mode RL(s). In normal mode, the UEs in SHO region use their own unique scrambling codes. The
description: A specific path for data transmission within the radio link. Used in conjunction with scrambling codes to discriminate between different user equipment (UEs) in soft handover scenarios. The channelisation code assigned for USTS mode plays a crucial role in distinguishing between UEs when they enter the SHO region from the same original cell.
explanation: The term 'Channel' is used to describe a data transmission path within a radio link, specifically for differentiating user equipment during soft handover procedures.
section_title: 4.3.1.1	Three modes for soft handover in USTS mode
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