User controlled transmit power control during handover in a CDMA system

A method for controlling a transmit power of a mobile user equipment being in radio communication with at least one base station of a wireless communication system, wherein the transmit power of the user equipment is normally controlled by the communication system via power control commands,

• the method comprising:
• in response to ascertaining that a handover event has been triggered, conditionally overriding said power control commands from the base station, wherein overriding said power control commands from the base station comprises increasing the transmit power emitted by the user equipment before or during sending of a handover message to a base station, the handover message requesting an action in the communication system and requiring a response from the base station, said increasing being performed by the user equipment irrespective of said power control commands from the base station, and
• resuming normal operation in the user equipment before performing said requested action, wherein normal operation comprises controlling the transmit power of the user equipment in accordance with the power control commands of the communication system;
• wherein the method further comprises:
• increasing a power level transmitted by a base station during a time period following sending of the handover message;
• and
• increasing, by the user equipment, a target signal-to-interference ratio value, for increasing the power level transmitted by the base station.

A device for controlling a transmit power of a mobile user equipment being in communication with at least one base station of a wireless communication system, wherein the transmit power of the user equipment is normally controlled by the communication system via power control commands, comprising:

• a power control unit for, in response to ascertaining that a handover event has been triggered, conditionally overriding said power control commands from the base station, wherein overriding said power control commands from the base station comprises increasing the transmit power emitted by the user equipment before or during sending of a handover message to a base station, the handover message requesting an action in the communication system and requiring a response from the base station, said increasing being performed by the user equipment irrespective of said power control commands from the base station;
• and for resuming normal operation in the user equipment before performing said requested action, wherein normal operation comprises controlling the transmit power of the user equipment in accordance with the power control commands of the communication system;
• wherein said power control system for control of the transmit power of the user equipment controls the power in a closed loop circuit during normal operation in the user equipment;
• and the device further comprises
• a switch unit for opening the loop of the closed loop power control system,
• wherein the switch unit comprises:
• a first switch for opening the closed loop and increasing the transmit power;
• and
• a second switch for maintaining the increased power during a time sufficient for sending the handover message.

A device for controlling a transmit power of a mobile user equipment being in communication with at least one base station of a wireless communication system, wherein the transmit power of the user equipment is normally controlled by the communication system via power control commands, comprising:

• a power control unit for, in response to ascertaining that a handover event has been triggered, conditionally overriding said power control commands from the base station, wherein overriding said power control commands from the base station comprises increasing the transmit power emitted by the user equipment before or during sending of a handover message to a base station, the handover message requesting an action in the communication system and requiring a response from the base station, said increasing being performed by the user equipment irrespective of said power control commands from the base station;
• and for resuming normal operation in the user equipment before performing said requested action, wherein normal operation comprises controlling the transmit power of the user equipment in accordance with the power control commands of the communication system;
• wherein said power control system for control of the transmit power of the user equipment controls the power in a closed loop circuit during normal operation in the user equipment;
• and the device further comprises
• a switch unit for opening the loop of the closed loop power control system;
• and
• a toggling circuit for maintaining the increased power during a time sufficient for sending the message, the toggling circuit comprising a delay circuit, a NOT circuit and an OR circuit.

A device for controlling a transmit power of a mobile user equipment being in communication with at least one base station of a wireless communication system, wherein the transmit power of the user equipment is normally controlled by the communication system via power control commands, comprising:

• a power control unit for, in response to ascertaining that a handover event has been triggered, conditionally overriding said power control commands from the base station, wherein overriding said power control commands from the base station comprises increasing the transmit power emitted by the user equipment before or during sending of a handover message to a base station, the handover message requesting an action in the communication system and requiring a response from the base station, said increasing being performed by the user equipment irrespective of said power control commands from the base station;
• and for resuming normal operation in the user equipment before performing said requested action, wherein normal operation comprises controlling the transmit power of the user equipment in accordance with the power control commands of the communication system,
• a power control unit for increasing a power level transmitted by a base station during a time period following sending of the handover message,
• a register in the user equipment including a target signal-to-interference ratio value, and
• a control unit for increasing the power level transmitted by the base station by increasing the target signal-to-interference ratio value.

A non-transitory computer readable medium having stored therein a computer program product comprising computer program code means to execute a method when the computer program code means is run by an electronic device having computer capabilities, said method being for controlling a transmit power of a mobile user equipment being in radio communication with at least one base station of a wireless communication system, wherein the transmit power of the user equipment is normally controlled by the communication system via power control commands, and said method comprising:

• in response to ascertaining that a handover event has been triggered, conditionally overriding said power control commands from the base station, wherein overriding said power control commands from the base station comprises increasing the transmit power emitted by the user equipment before or during sending of a handover message to a base station, the handover message requesting an action in the communication system and requiring a response from the base station, said increasing being performed by the user equipment irrespective of said power control commands from the base station, and
• resuming normal operation in the user equipment before performing said requested action, wherein normal operation comprises controlling the transmit power of the user equipment in accordance with the power control commands of the communication system,
• wherein the transmit power of the user equipment is, during normal operation in the user equipment, controlled by a closed loop power control system, arranged so that the transmission results in a signal-to-interference ratio value equal to a target signal-to-interference ratio value;
• and
• the method further comprises:
• adjusting the closed loop power control system into an open loop power control system, for increasing the transmit power during said overriding of said power control commands from the base station,
• wherein the power control system emits power control signals for increasing or decreasing the power emitted by the user equipment, and the method further comprises:
• generating, by the user equipment, a number of power increase signals, in order to initially increase the transmit power during open loop control.

A non-transitory computer readable medium having stored therein a computer program product comprising computer program code means to execute a method when the computer program code means is run by an electronic device having computer capabilities, said method being for controlling a transmit power of a mobile user equipment being in radio communication with at least one base station of a wireless communication system, wherein the transmit power of the user equipment is normally controlled by the communication system via power control commands, and said method comprising:

• in response to ascertaining that a handover event has been triggered, conditionally overriding said power control commands from the base station, wherein overriding said power control commands from the base station comprises increasing the transmit power emitted by the user equipment before or during sending of a handover message to a base station, the handover message requesting an action in the communication system and requiring a response from the base station, said increasing being performed by the user equipment irrespective of said power control commands from the base station, and
• resuming normal operation in the user equipment before performing said requested action, wherein normal operation comprises controlling the transmit power of the user equipment in accordance with the power control commands of the communication system,
• wherein the method further comprises:
• increasing a power level transmitted by a base station during a time period following sending of the handover message;
• and
• increasing, by the user equipment, a target signal-to-interference ratio value, for increasing the power level transmitted by the base station.