1 © Nokia Siemens Networks Presentation / Author / DateFor internal use

Changing WCEL UARFCN in WCDMA with Configurator toolsLeena Rasinaho

12 September 2012

2 © Nokia Siemens Networks Presentation / Author / DateFor internal use

About UARFCN 1/2

• WCEL UARFCN description: Parameter UARFCN defines the DL channel number and the DL carrier frequency of the cell.

RNC calculates the UL carrier frequency and the UL channel number from the DL carrier frequency and a duplex distance used in the RF band.

•Each RF band has its own range of allowed DL channel numbers, for example ” RF band IV: Allowed DL channel numbers are: 1537-1738. Allowed additional DL channel numbers are 1887, 1912, 1937, 1962, 1987, 2012, 2037, 2062, and 2087.”•Optional features: WCDMA 1900, WCDMA 850, WCDMA 1700 & 1800, WCDMA 1700/2100, WCDMA 900, Full WCDMA 1900 UARFCN range

3 © Nokia Siemens Networks Presentation / Author / DateFor internal use

About UARFCN 2/2

• It is not possible to modify WCEL UARFCN in the network element

•The main reason for this restriction is UARFCN’s impact on adjacency types: if the source and target cells have the same UARFCN, the adjancency needs to be of type ADJS; if the source and target cells have different UARFCNs, the adjancency needs to be of type ADJI

•Supporting adjacency type changes ”on-the-fly” would have been a big effor especially for the network element functionality not implemented in the NE UARFCN modification not allowed in the parameter metadata

4 © Nokia Siemens Networks Presentation / Author / DateFor internal use

Current solution

• Plan Editor supports:– Importing the WCEL UARFCN mofidification plan in Plan Editor

– WCEL deletion plan creation

– WCEL recreation plan creation

– Adjacency update plan creation

• Once plans are created with Plan Editor, they can be provisioned in the NE in correct order; there is no ready-made CM Operation Manager workflow for this, the user needs to know the order

5 © Nokia Siemens Networks Presentation / Author / DateFor internal use

Proposed solution

NMS

NetActXML

PlanningSystems

NMS

Planning tool

CM

Data

CM

Data

ConfiguratorRNW

plans

2) New workflow created

First operation: import WCEL UARFCN plan operation which initiates WCEL deletion plan and WCEL creation & adjancency creation plan generation in Configurator

Planning tool

Planning tool

CSV

NMSNMS

1) WCEL UARFCN modification plan

Alternatives:a) New non-network

parameter introduced: WCEL newUARFCN

b) Normal WCEL UARFCN used with special handling (annotation?)

3) Second operation: provision WCEL deletion plan in the RNC(s); all outgoing and incoming adjancencies are deleted

4) Third operation: provision WCEL creation and adjancecy creation plan

RNC

BSC

IADA

LTE BTS