10 RN3154AEN50GLA0 Initial Parameter Planning

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Scrambling codes organized into 512 primary and 512 * 15 secondary codes

Planning required for primary scrambling codes only

To each cell 1 primary scrambling code has to be assigned

To each primary scrambling code 15 secondary scrambling codes are referred automatically

Primary scrambling codes organized into 64 groups, each having 8 codes

Can maximize the number of neighbors belonging to different groups

fast decoding of neighbors on S-SCH, slow on CPICH

Can maximize the number of neighbors belonging to same group

slow decoding of neighbors on S-SCH, fast on CPICH

Difference between the two strategies depends mainly on UE implementation

Recommendation of SC planing:

• Isolation between cells assigned the same scrambling code should be maximized

• UE should never simultaneously receive the same scrambling code from more than 1 cell

• UE should never receives a scrambling code from one cell while expecting to receive the

same scrambling code from second cell

• Scrambling code planning should be completed in conjunction with

• Neighbor list planning

• Neighbor list audits

• Coordination at international borders

• Specific scrambling codes should be excluded from the plan to allow for future network expansion

• If two (or more) RF carries serve the same coverage area, the same scrambling code should be assigned to each of them (although scrambling codes can be assigned carrier independent)

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Feature Soft Handover based on DSR also allows HO to cell not specified in ADJS objects.

However HO is only possible to cell which are specified by ADJD objects

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The exact max number of neighbors depends on the configuration of the cells.

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