Apparatus and method for controlling reverse-link data transmission rate during handoff

A method of controlling data transmission rate in a terminal used in a wireless communication system comprising a network, the method comprising:

• providing data to the network at a first data transmission rate, wherein the first data transmission rate is associated with a first traffic-to-pilot power ratio;
• receiving a rate control parameter from at least one of a serving base station and a non-serving base station, wherein
• if the rate control parameter is received from the serving base station, the rate control parameter comprises a first, second, or third control state, the first control state indicating increasing the first traffic-to-pilot power ratio, the second control state indicating decreasing the first traffic-to-pilot power ratio, and the third control state indicating maintaining the first traffic-to-pilot power ratio, and wherein
• if the rate control parameter is received from the non-serving base station, the rate control parameter comprises a fourth control state, the fourth control state indicating decreasing the first traffic-to-pilot power ratio;
• updating a second traffic-to-pilot power ratio of the terminal by decreasing the first traffic-to-pilot power ratio when the rate control parameter received from the non-serving base station includes the fourth control state indicating decreasing the first traffic-to-pilot power ratio;
• updating the second traffic-to-pilot power ratio for the terminal using the rate control parameter received from the serving base station as long as any rate control parameter that is received from the non-serving base station does not include the fourth control state indicating decreasing the first traffic-to-pilot power ratio;
• and
• determining a second data transmission rate for the terminal based upon the second traffic-to-pilot power ratio.

A method of controlling data transmission rate in a terminal used in a wireless communication system comprising a network, the method comprising:

• providing data to the network at a first data transmission rate wherein the first data transmission rate is associated with a first traffic-to-pilot power ratio;
• receiving a first rate control parameter from at least one of a serving base station and a non-serving base station;
• determining if a second rate control parameter indicating a specific data transmission rate has been received, wherein if the second rate control parameter has been received, the method further comprises:
• determining a traffic-to-pilot power ratio for the terminal based upon the second rate control parameter, regardless of whether the first rate control parameter has been received from the serving base station and/or the non-serving base station;
• otherwise, if the second rate control parameter has not been received, the method further comprises:
• if the rate control parameter is received from the serving base station, the rate control parameter comprises a first, second, or third control state, the first control state indicating increasing the first traffic-to-pilot power ratio, the second control state indicating decreasing the first traffic-to-pilot power ratio, and the third control state indicating maintaining the first traffic-to-pilot power ratio, and wherein
• if the rate control parameter is received from the non-serving base station, the rate control parameter comprises a fourth control state, the fourth control state indicating decreasing the first traffic-to-pilot power ratio;
• updating a second traffic-to-pilot power ratio of the terminal by decreasing the first traffic-to-pilot power ratio when the rate control parameter received from the non-serving base station includes the fourth control state indicating decreasing the first traffic-to-pilot power ratio;
• updating the second traffic-to-pilot power ratio for the terminal using the rate control parameter received from the serving base station as long as any rate control parameter that is received from the non-serving base station does not include the fourth control state indicating decreasing the first traffic-to-pilot power ratio;
• and
• determining a second data transmission rate for the terminal based upon the second traffic-to-pilot power ratio.

A method of controlling data transmission rate in a terminal used in a wireless communication system comprising a network, the method comprising:

• providing data to the network at a first data transmission rate wherein the first data transmission rate is associated with a first traffic-to-pilot power ratio;
• receiving a first rate control parameter from at least one of a serving base station and a non-serving base station;
• determining if a second rate control parameter indicating a specific data transmission rate has been received, wherein if the second rate control parameter has been received, the method further comprises:
• determining a traffic-to-pilot power ratio for the terminal based upon the second rate control parameter and the first rate control parameter from the non-serving base station, regardless of whether the first rate control parameter has been received from the serving base station and/or the non-serving base station;
• otherwise, if the second rate control parameter has not been received, the method further comprises:
• if the rate control parameter is received from the serving base station, the rate control parameter comprises a first, second, or third control state, the first control state indicating increasing the first traffic-to-pilot power ratio, the second control state indicating decreasing the first traffic-to-pilot power ratio, and the third control state indicating maintaining the first traffic-to-pilot power ratio, and wherein
• if the rate control parameter is received from the non-serving base station, the rate control parameter comprises a fourth control state, the fourth control state indicating decreasing the first traffic-to-pilot power ratio;
• updating a second traffic-to-pilot power ratio of the terminal by decreasing the first traffic-to-pilot power ratio when the rate control parameter received from the non-serving base station includes the fourth control state indicating decreasing the first traffic-to-pilot power ratio;
• updating the second traffic-to-pilot power ratio for the terminal using the rate control parameter received from the serving base station as long as any rate control parameter that is received from the non-serving base station does not include the fourth control state indicating decreasing the first traffic-to-pilot power ratio;
• and
• determining a second data transmission rate for the terminal based upon the second traffic-to-pilot power ratio.

A method of controlling data transmission rate in a terminal used in a wireless communication system comprising a network, the method comprising:

• providing data to the network at a first data transmission rate wherein the first data transmission rate is associated with a first traffic-to-pilot power ratio;
• receiving a first rate control parameter from at least one of a serving base station and a non-serving base station;
• determining if a second rate control parameter indicating a specific data transmission rate has been received, wherein if the second rate control parameter has been received the first rate control parameter has been received from the serving base station, and the first rate control parameter has not been received from the non-serving base station, the method further comprises:
• determining a traffic-to-pilot power ratio for the terminal based upon the second rate control parameter, regardless of the receiving of the first rate control parameter from the serving base station;
• otherwise, if the second rate control parameter has not been received, the method further comprises:
• if the rate control parameter is received from the serving base station, the rate control parameter comprises a first, second, or third control state, the first control state indicating increasing the first traffic-to-pilot power ratio, the second control state indicating decreasing the first traffic-to-pilot power ratio, and the third control state indicating maintaining the first traffic-to-pilot power ratio, and wherein
• if the rate control parameter is received from the non-serving base station, the rate control parameter comprises a fourth control state, the fourth control state indicating decreasing the first traffic-to-pilot power ratio;
• updating a second traffic-to-pilot power ratio of the terminal by the first traffic-to-pilot power ratio when the rate control parameter received from the non-serving base station includes the fourth control state indicating decreasing the first traffic-to-pilot power ratio;
• updating the second traffic-to-pilot power ratio for the terminal using the rate control parameter received from the serving base station as long as any rate control parameter that is received from the non-serving base station does not include the fourth control state indicating decreasing the first traffic-to-pilot power ratio;
• and
• determining a second data transmission rate for the terminal based upon the second traffic-to-pilot power ratio.

A terminal for use in a wireless communication system comprising a network, the terminal comprising:

• a transmitter configured to provide data to the network at a first data transmission rate, wherein the first data transmission rate is associated with a first traffic-to-pilot power ratio;
• a receiver configured to receive a rate control parameter from at least one of a serving base station and a non-serving base station;
• and
• a processor operatively coupled to the transmitter and the receiver and configured to control the terminal, wherein
• if the rate control parameter is received from the serving base station, the rate control parameter comprises a first, second, or third control state, the first control state indicating increasing the first traffic-to-pilot power ratio, the second control state indicating decreasing the first traffic-to-pilot power ratio, and the third control state indicating maintaining the first traffic-to-pilot power ratio, and wherein
• if the rate control parameter is received from the non-serving base station, the rate control parameter comprises a fourth control state, the fourth control state indicating decreasing the first traffic-to-pilot power ratio,
• wherein the processor is further configured to:
• update a second traffic-to-pilot power ratio of the terminal by decreasing the first traffic-to-pilot power ratio when the rate control parameter received from the non-serving base station includes the fourth control state indicating decreasing the first traffic-to-pilot power ratio;
• update the second traffic-to-pilot power ratio for the terminal using the rate control parameter received from the serving base station as long as any rate control parameter that is received from the non-serving base station does not include the fourth control state indicating decreasing the first traffic-to-pilot power ratio;
• and
• determine a second data transmission rate for the terminal based upon the second traffic-to-pilot power ratio.