초록 ▼

Base station in a soft handoff programmed to have a threshold power level to control the power transmitted by the base station on the forward link. When the threshold power level is a minimum-threshold power level, each base station maintains its transmit power level at or above the minimum-threshol

Base station in a soft handoff programmed to have a threshold power level to control the power transmitted by the base station on the forward link. When the threshold power level is a minimum-threshold power level, each base station maintains its transmit power level at or above the minimum-threshold power level. When the threshold power level is a maximum-threshold power level, each base station maintains its transmit power level at or below the maximum-threshold power level. Preferably, all power levels are expressed in decibels (dB) relative to the pilot's power level. The threshold power level can be adjustable or fixed. In the case where the threshold power level is fixed, each base station is programmed with the fixed threshold power level, and each base station decides how to adjust its transmit power level locally based on the fixed threshold power level without input from other base stations. In the case where the threshold power level is adjustable, the threshold power level is adjusted by a threshold step size responsive to the transmit power level being substantially equal to the threshold power level for at least a predetermined percentage of a time period. There are two alternatives on how each base station decides how to adjust its transmit power level. In one alternative, each base station participating in a soft handoff sends its power control information to a processor which adjusts the threshold power level and notifies each base station of the new adjusted threshold power level. In the meantime, each base station uses its current threshold power level to locally adjust its transmit power level. In the other alternative, each base station adjusts the threshold power level locally without input from other base stations, and uses the threshold power level to adjust its transmit power level.

대표청구항 ▼

Base station in a soft handoff programmed to have a threshold power level to control the power transmitted by the base station on the forward link. When the threshold power level is a minimum-threshold power level, each base station maintains its transmit power level at or above the minimum-threshol

Base station in a soft handoff programmed to have a threshold power level to control the power transmitted by the base station on the forward link. When the threshold power level is a minimum-threshold power level, each base station maintains its transmit power level at or above the minimum-threshold power level. When the threshold power level is a maximum-threshold power level, each base station maintains its transmit power level at or below the maximum-threshold power level. Preferably, all power levels are expressed in decibels (dB) relative to the pilot's power level. The threshold power level can be adjustable or fixed. In the case where the threshold power level is fixed, each base station is programmed with the fixed threshold power level, and each base station decides how to adjust its transmit power level locally based on the fixed threshold power level without input from other base stations. In the case where the threshold power level is adjustable, the threshold power level is adjusted by a threshold step size responsive to the transmit power level being substantially equal to the threshold power level for at least a predetermined percentage of a time period. There are two alternatives on how each base station decides how to adjust its transmit power level. In one alternative, each base station participating in a soft handoff sends its power control information to a processor which adjusts the threshold power level and notifies each base station of the new adjusted threshold power level. In the meantime, each base station uses its current threshold power level to locally adjust its transmit power level. In the other alternative, each base station adjusts the threshold power level locally without input from other base stations, and uses the threshold power level to adjust its transmit power level. time stamp entry in the forwarding table to determine if there is a time difference, and entering the link-layer address and the time stamp conveyed by the active packet into the forwarding table only if there is a time difference. 2. A method for managing the mobility of a wireless mobile terminal in a subnet of a network, the mobile terminal directly communicating with a first base station within the subnet and the subnet containing a node directly coupled to the first base station, the method comprising the steps of locating a second base station to directly communicate with the mobile terminal in place of the first base station, transmitting an active packet from the mobile terminal to the second base station, and executing a mobility process in the subnet in response to the active packet, the step of executing including the steps of sending a second active packet to the first base station from the node as a step in the mobility process, the second active packet conveying a network-layer address of the mobile terminal, a link-layer address of the node, and a time stamp indicative of the time of origination of the active packet sent to the second base station from the mobile terminal, configuring the first base station with a forwarding table for storing a mobile terminal network-layer address entry, a corresponding link-layer address entry, and a corresponding time stamp entry, comparing the time stamp conveyed by the second packet with the time stamp entry in the forwarding table to determine if there is a time difference, and entering the link-layer address and the time stamp conveyed by the second packet into the forwarding table only if there is a time difference. 3. A method for managing the mobility of a wireless mobile terminal in a subnet of a packet network, the mobile terminal directly communicating a first gatekeeper functioning as a first base station within the subnet, the method comprising the steps of scanning the subnet using an algorithm carried out at a physical layer for a second gatekeeper functioning as a second base station to directly communicate with the mobile terminal in place of the first gatekeeper, transmitting an active packet from the mobile terminal to the second gatekeeper, wherein the active packet conveys a network-layer address of the mobile terminal, a link-layer address of the mobile terminal, and a time-stamp indicative of the time of origination of the active packet, and executing a mobility process in the first and second gatekeepers in response to the active packet, the step of executing including the steps of configuring the first base station with a forwarding table for storing a mobile terminal network-layer address entry, a corresponding link-layer address entry, and a corresponding time stamp entry, configuring the second gatekeeper with a forwarding table for storing a mobile terminal network-layer address entry, a corresponding link-layer address entry, and a corresponding time stamp entry, comparing the time stamp entry conveyed by the active packet with the time stamp entry in the forwarding table to determine if there is a time difference, and entering the link-layer address and the time stamp conveyed by the active packet into the forwarding table only if there is a time difference. 4. A method for managing the mobility of a wireless mobile terminal in a subnet of a packet network, the mobile terminal directly communicating with a first gatekeeper functioning as a first base station within the subnet and wherein the subnet contains a node directly coupled to the first gatekeeper, the method comprising the steps of scanning the subnet using an algorithm carried out at a physical layer for a second gatekeeper functioning as a second base station to directly communicate with the mobile terminal in place of the first gatekeeper, transmitting an active packet from the mobile terminal to the second gatekeeper, and executing a mobility process