Determination of initial transmit power based on shared transmit-power information
First Claim
1. A method comprising:
- at a first mobile station configured to operate in a radio access network, determining a verified transmit power (VTP) for the first mobile station, wherein determining the VTP for the first mobile station comprises;
transmitting an access probe to a base station in the radio access network and waiting for an acknowledgement from the base station, wherein transmit power of the access probe is initially set at a predetermined ITP;
if the acknowledgement is not received from the base station within the predetermined period of time, then repeatedly (i) increasing the transmit power, (ii) re-transmitting the access probe to the base station, and (iii) waiting the predetermined period of time, until the acknowledgement is received from the base station; and
determining the VTP to be the transmit power of the access probe when the acknowledgement is received from the base station;
the first mobile station using the VTP to generate a transmit-power message, wherein the transmit-power message is usable to determine an initial transmit power (ITP) for the second mobile station; and
the first mobile station sending the transmit-power message to at least the second mobile station.
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Accused Products
Abstract
Methods and systems are disclosed herein that may be used to share transmit-power information between mobile stations. An exemplary method involves a first mobile station: (i) determining a verified transmit power (VTP) for the first mobile station; (ii) using the VTP to generate a transmit-power message, wherein the transmit-power message is usable to determine an initial transmit power (ITP) for the second mobile station; and (iii) the first mobile station sending the transmit-power message to at least the second mobile station. For instance, the first mobile station may set the ITP for the second mobile station equal to the VTP for the first mobile station, and include an indication of the ITP in the transmit-power message. Alternatively, the first mobile station may calculate the ITP for the second mobile station by adjusting its VTP according to the ratio of the distance between the second mobile station and the serving base station, and the distance between the first mobile station and the serving base station.
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Citations
28 Claims
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1. A method comprising:
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at a first mobile station configured to operate in a radio access network, determining a verified transmit power (VTP) for the first mobile station, wherein determining the VTP for the first mobile station comprises; transmitting an access probe to a base station in the radio access network and waiting for an acknowledgement from the base station, wherein transmit power of the access probe is initially set at a predetermined ITP; if the acknowledgement is not received from the base station within the predetermined period of time, then repeatedly (i) increasing the transmit power, (ii) re-transmitting the access probe to the base station, and (iii) waiting the predetermined period of time, until the acknowledgement is received from the base station; and determining the VTP to be the transmit power of the access probe when the acknowledgement is received from the base station; the first mobile station using the VTP to generate a transmit-power message, wherein the transmit-power message is usable to determine an initial transmit power (ITP) for the second mobile station; and the first mobile station sending the transmit-power message to at least the second mobile station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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at a second mobile station configured to operate in a radio access network, receiving a transmit-power message that was transmitted from a first mobile station, wherein the transmit-power message comprises an indication of a verified transmit power (VTP) for the first mobile station, wherein the VTP is a transmit power of an access probe when the first mobile station received an acknowledgement of an access probe from a base station, wherein the first mobile station initially transmitted the access probe to the base station at a predetermined initial transmit power (ITP) and then waited for the acknowledgement from the base station, and wherein, if the acknowledgement was not received from the base station within the predetermined period of time, the first mobile station repeatedly (i) increased the transmit power for the access probe, (ii) re-transmitted the access probe to the base station, and (iii) waited for the predetermined period of time, until the acknowledgement was received from the base station; the second mobile station using the received indication of the VTP for the first mobile station as a basis for determining an ITP for the second mobile station; and the second mobile station transmitting an access probe at the ITP for the second mobile station. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A system comprising:
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data storage; at least one processor; and program logic stored in the data storage and executable by the at least one processor to; (a) cause a second mobile station to receive a transmit-power message that was transmitted by a first mobile station, wherein the transmit-power message comprises an indication of a verified transmit power (VTP) for the first mobile station, wherein the VTP is a transmit power of an access probe when the first mobile station received an acknowledgement of an access probe from a base station, wherein the first mobile station initially transmitted the access probe to the base station at a predetermined initial transmit power (ITP) and then waited for the acknowledgement from the base station, and wherein, if the acknowledgement was not received from the base station within the predetermined period of time, the first mobile station repeatedly (i) increased the transmit power for the access probe, (ii) re-transmitted the access probe to the base station, and (iii) waited for the predetermined period of time, until the acknowledgement was received from the base station; (b) use the received indication of the VTP for the first mobile station as a basis to determine an initial transmit power (ITP) for the second mobile station; and (c) cause the second mobile station to transmit an access probe at the determined ITP. - View Dependent Claims (19, 20, 21, 22, 23)
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24. A system comprising:
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data storage; at least one processor; and program logic stored in the data storage and executable by the at least one processor to; (a) determine a verified transmit power (VTP) for a first mobile station by; transmitting an access probe to a base station in the radio access network and waiting for an acknowledgement from the base station, wherein transmit power of the access probe is initially set at a predetermined ITP; if the acknowledgement is not received from the base station within the predetermined period of time, then repeatedly (i) increasing the transmit power, (ii) re-transmitting the access probe to the base station, and (iii) waiting the predetermined period of time, until the acknowledgement is received from the base station; and determining the VTP to be the transmit power of the access probe when the acknowledgement is received from the base station; (b) use the VTP as a basis to generate a transmit-power message, wherein the transmit-power message is usable by a second mobile station to determine an initial transmit power (ITP) for the second mobile station; and (c) cause the first mobile station to send the transmit-power message to at least the second mobile station. - View Dependent Claims (25, 26, 27, 28)
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Specification