US 2002/0173330 A1Published application

Updating method for a target SIR in uplink outer loop control

AssigneeNEC Corporation

InventorsMasahiko Kojima, Efthymiou Nektaria

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Abstract

In a mobile system wherein a user equipment communicates by radio communication with a node which is connected to a radio network controller and has a target SIR used in the mobile system in carrying out uplink inner loop power control, updating of the target SIR is carried out as uplink outer loop power control by the radio network controller provided with a wait-timer which produces a time-out signal when said wait-timer times a preselected time duration after the wait-timer is set. The radio network controller judges whether or not the radio network controller receives from the node a report representative of a radio condition around the node before the wait-timer produces the time-out signal. The radio network controller updates the target SIR into a new target SIR on the basis of the report when the radio network controller judges that the radio network controller receives from the node the report before the wait-timer produces the time-out signal. The radio network controller again sets the wait-timer when the target SIR is updated into the new target SIR. The radio network controller decreases the target SIR by a predetermined value into a decreased target SIR when the radio network controller judges that the radio network controller does not yet receive from the node the report when the wait-timer produces the time-out signal. The radio network controller again sets the wait-timer when the target SIR is decreased into the decreased target SIR.

Claims8

Dependent claims

An updating method for use in a mobile system comprising a radio network controller, a node having a service area and connected to said radio network controller through a signal transmission line, and a user equipment which communicates with said node by radio communication within the service area of said node, uplink inner loop power control and uplink outer loop power control being carried out as transmission power control in said mobile system, said node having a target SIR (Signal to Interference Ratio) which is used in said mobile system in carrying out said uplink inner loop power control, said updating method being carried out as said uplink outer loop power control for updating said target SIR into a new target SIR and comprising the steps of:

making said radio network controller be provided with a wait-timer which produces a time-out signal when said wait-timer times a preselected time duration after said wait-timer is set;
judging in said radio network controller whether or not said radio network controller receives from said node a report representative of a radio condition around said node before said wait-timer produces said time-out signal;
updating said target SIR into said new target SIR in said radio network controller on the basis of said report when said radio network controller judges that said radio network controller receives from said node said report before said wait-timer produces said time-out signal;
again setting said wait-timer in said radio network controller when said target SIR is updated into said new target SIR in said radio network controller;
decreasing said target SIR by a predetermined value into a decreased target SIR in said radio network controller when said radio network controller judges that said radio network controller does not yet receive from said node said report when said wait-timer produces said time-out signal;
and
again setting said wait-timer in said radio network controller when said target SIR is decreased into said decreased target SIR in said radio network controller.

4 more elements

making said radio network controller be provided with a wait-timer which produces a time-out signal when said wait-timer times a preselected time duration after said wait-timer is set;
judging in said radio network controller whether or not said radio network controller receives from said node a report representative of a radio condition around said node before said wait-timer produces said time-out signal;
calculating said new target SIR in said radio network controller on the basis of said report when said radio network controller judges that said radio network controller receives from said node said report before said wait-timer produces said time-out signal;
transmitting said new target SIR from said radio network controller to said node to make said node update said target SIR into said new target SIR:
again setting said wait-timer in said radio network controller when said target SIR is updated into said new target SIR;
calculating a decreased target SIR obtained by decreasing said target SIR by a predetermined value in said radio network controller when said radio network controller judges that said radio network controller does not yet receive from said node said report when said wait-timer produces said time-out signal;
transmitting said decreased target SIR from said radio network controller to said node to make said node update said target SIR into said decreased target SIR;
and
again setting said wait-timer in said radio network controller when said target SIR is updated into said decreased target SIR.

6 more elements

Dependencies are inferred from the claim text.