TSGSAWG5 (TELECOM MANAGEMENT) MEETING 5 TSGS55(99)143 SAN DIEGO

TSGSAWG5 (NETWORK MANAGEMENT) MEETING 5 TSGS55 (99)135 SAN DIEGO
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TSGSAWG5 (TELECOM MANAGEMENT) MEETING 5 TSGS55(99)143 SAN DIEGO

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TSG-RAN3 Cell Available / Unavailable Procedures

TSG-RAN Working Group 3, O&M adhoc Meeting #3 TSGR3#5(99) 607

Münster, GERMANY, 29-30 June 1999

Agenda Item: 4

Source: Motorola

Title: Cell Availability / Unavailability logical O&M NBAP Procedures

Document for: Decision

1Introduction

In 25.433 NBAP Specification, the Cell Setup (section 8.1.5.1) and Cell Delete (section 8.1.5.2) procedures appear to span two domains:

• Network management domain – here the cell is defined (i.e., cell parameters set) by the management system.

• Logical O&M domain – here the CRNC and Node B either share cell configuration information to make a cell available for carrying traffic or remove a cell context known between the network elements.

By exceeding the logical O&M domain, the procedures appear to increase the difficulties in creating a multi-vendor UTRAN environment.

The intent of this contribution is to limit the procedures defined in NBAP specification to the logical O&M domain. Creation and deletion of cell parameters remains within the network management domain. The logical O&M domain is restricted to synchronization between the CRNC and the Node B. This synchronization consists of an agreement of which cells exist, as well as a sharing of cell parameters owned by one network element and required by the other network element.

A new terminology has been employed in an attempt to emphasize the logical O&M domain limits of the NBAP procedures. The procedure scope is confined to the logical O&M perspective of making a cell available or unavailable for carrying traffic.

2Procedure Definition

2.1Cell Availability Procedure

The Cell Availability procedure is used for cell existence synchronization between the CRNC and the Node B to indicate that the specified cell is available to carry traffic. The CRNC becomes aware of cells via the CRNC management system. The Node B becomes aware of cells via the Node B management system. The CRNC tells the Node B of the cells it is aware. The Node B responds to the CRNC with cells that it is also aware. The Node B stores (remembers) the logical cells of which the Node B is not aware and notifies the CRNC as it becomes aware of cells from the CRNC list.

CELL AVAILABILITY REQUEST

CRNC

Node B

CELL AVAILABILITY RESPONSE

CELL AVAILABILITY REQUEST message contains:

• Cell identity

• Logical cell parameters owned by the CRNC and required by the Node B

If the Node B management system has configured the implementation specific and logical cell parameters at the Node B for the cell identity listed in the request, the Node B indicates success in the response.

CELL AVAILABILITY RESPONSE message contains:

• Cell identity

• Logical cell parameters owned by the Node B and required by the CRNC

If the Node B is not aware of the cell identity specified in the request or has not been configured with its required cell parameters, a negative acknowledge (NACK) is sent in the response (failure case). After sending the CELL AVAILABILITY RESPONSE (NACK), once the Node B receives and applies from the Node B management system the necessary cell parameters (both implementation specific and logical), for any of the cells that the Node B NACK’ed, the Node B sends an indication of the cell availability.

CRNC

Node B

CELL AVAILABILITY REQUEST

CELL AVAILABILITY RESPONSE (with NACK)

Node B received (from Node B management system) necessary cell parameters and applied them

CELL AVAILABILITY INDICATION

CELL AVAILABILITY ACKNOWLEDGE

CELL AVAILABILITY INDICATION message contains:

• Cell identity

• Logical cell parameters owned by the Node B and required by the CRNC

CELL AVAILABILITY ACKNOWLEDGE message contains:

• Cell identity

• Logical cell parameters owned by the CRNC and required by the Node B

The four messages shown above (CELL AVAILABILITY request / response / indication / acknowledge) should handle the synchronization issue and also relieve the CRNC of tracking Node B cells of which the CRNC has no knowledge.

Note that cell parameter changes from the CRNC should not be allowed for the cell that the Node B sends a NACK in the CELL AVAILABILITY RESPONSE.

2.2Cell Unavailability Procedure

The cell unavailability procedure is used to remove the agreement of a cell’s existence between a CRNC and Node B. The following two messages correspond to when the CRNC initiates the procedure.

CRNC

Node B

CELL UNAVAILABILITY INDICATION

CELL UNAVAILABILITY ACKNOWLEDGE

CELL UNAVAILABILITY REQUEST message contains:

• Cell identity

CELL UNAVAILABILITY RESPONSE message contains:

• Cell identity

• ACK (success) or NACK (error case)

The following two messages are employed when the Node B initiates the procedure. Note that the Node B only initiates the procedure when agreement on a cell existence has previously occurred. The Node B does not initiate this procedure if the Node B is aware of a logical cell of which the CRNC is not aware.

CRNC

Node B

CELL UNAVAILABILITY INDICATION

CELL UNAVAILABILITY ACKNOWLEDGE

CELL UNAVAILABILITY INDICATION message contains:

• Cell identity

CELL UNAVAILABILITY ACKNOWLEDGE message contains:

• Cell identity

• ACK (success) or NACK (error case)

3Presumptions

A Node B control port is available for communication between the RNC and Node B, for the procedures to be executed successfully.

4Proposal:

1. To replace the Cell Setup procedure found in 25.433 (v1.0.2) section 8.1.5.1 with the Cell Available procedure.

2. To replace the Cell Delete procedure found in 25.433 (v1.0.2) section 8.1.5.2 with the Cell Unavailable procedure.

Tags: (telecom management), tsgsawg5, diego, meeting, (telecom, management), tsgs55(99)143

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