Antenna selection method
First Claim
1. A method of initiating a telecommunications uplink from a mobile terminal to a telecommunications network, the mobile terminal having a transmission chain including a baseband stage, a power amplification stage and an antenna, the method comprising:
- transmitting a preamble signal from the mobile terminal at a first time, the preamble signal being transmitted in accordance with at least two variable transmission parameters of the mobile terminal; and
determining whether a base station has successfully received the preamble signal;
in the event it is not determined that a base station has successfully received the preamble signal, changing at least one of the transmission parameters, and repeating the transmitting of the preamble signal and the determining whether a base station has successfully received the preamble signal at a time later than the first time,wherein each time it is not determined that a base station has successfully received the preamble signal, the changing at least one of the transmission parameters comprises varying a transmission parameter of the preamble signal that is different from a transmission parameter varied in the previous transmission, andwherein the changing at least one of the transmission parameters results in an alteration of a signal diversity of one or more preambles as received by the base station at the later time.
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Accused Products
Abstract
Embodiments of the invention provide a method and apparatus for initiating a telecommunications uplink from a mobile terminal to a telecommunications network. A preamble signal is transmitted from the mobile terminal to the network in accordance with a transmission parameter of the mobile terminal. The parameter is changed and the preamble retransmitted until successful receipt in the network is confirmed. Changing the transmission parameter alters the signal diversity of one or more preambles as received by the base station.
35 Citations
18 Claims
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1. A method of initiating a telecommunications uplink from a mobile terminal to a telecommunications network, the mobile terminal having a transmission chain including a baseband stage, a power amplification stage and an antenna, the method comprising:
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transmitting a preamble signal from the mobile terminal at a first time, the preamble signal being transmitted in accordance with at least two variable transmission parameters of the mobile terminal; and determining whether a base station has successfully received the preamble signal; in the event it is not determined that a base station has successfully received the preamble signal, changing at least one of the transmission parameters, and repeating the transmitting of the preamble signal and the determining whether a base station has successfully received the preamble signal at a time later than the first time, wherein each time it is not determined that a base station has successfully received the preamble signal, the changing at least one of the transmission parameters comprises varying a transmission parameter of the preamble signal that is different from a transmission parameter varied in the previous transmission, and wherein the changing at least one of the transmission parameters results in an alteration of a signal diversity of one or more preambles as received by the base station at the later time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus, comprising:
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a transmission chain including a baseband stage, a power amplification stage and an antenna; a transmitter configured to transmit a preamble signal in accordance with at least two variable transmission parameters of the apparatus at a first time; a determiner configured to determine whether a base station has successfully received the preamble signal; and in the event it is not determined that a base station has successfully received the preamble signal, a changing unit is configured to change at least one of the transmission parameters, and repeat the transmission of the preamble signal and the determination of whether the base station has successfully received the preamble signal at a time later than the first time, wherein each time it is not determined that a base station has successfully received the preamble signal, the changing of the at least one of the transmission parameters by the changing unit comprises varying a transmission parameter of the preamble signal that is different from a transmission parameter varied in the previous transmission, and wherein the changing of the at least one of the transmission parameters by the changing unit results in an alteration of a signal diversity of one or more subsequent preambles as received by the base station at the later time. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A computer-readable medium encoded with a computer program, the computer program configured to control a processor to perform operations comprising:
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transmitting a preamble signal from a mobile terminal at a first time, the preamble signal being transmitted in accordance with at least two variable transmission parameters of the mobile terminal; determining whether a base station has successfully received the preamble signal; and in the event it is not determined that a base station has successfully received the preamble signal, changing at least one of the transmission parameters, and repeating the transmitting of the preamble signal and the determining whether a base station has successfully received the preamble signal at a time later than the first time, wherein each time it is not determined that a base station has successfully received the preamble signal, the changing at least one of the transmission parameters comprises varying a transmission parameter of the preamble signal that is different from a transmission parameter that was varied in the previous transmission, and wherein the changing at least one of the transmission parameters results in an alteration of a signal diversity of one or more preambles as received by the base station at the later time.
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18. An apparatus, comprising:
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a transmission chain including a baseband stage, a power amplification stage and an antenna; transmitting means for transmitting a preamble signal in accordance with at least two-transmission parameters of the apparatus at a first time; determining means for determining whether a base station has successfully received the preamble signal; and in the event it is not determined that a base station has successfully received the preamble signal, changing means for changing at least one of the transmission parameters, and repeating the transmission of the preamble signal and the determination of whether the base station has successfully received the preamble signal at a time later than the first time, wherein each time it is not determined that a base station has successfully received the preamble signal, the changing of the at least one of the transmission parameters by the changing means comprises varying a transmission parameter of the preamble signal that is different from a transmission parameter varied in the previous transmission, and wherein the changing of the at least one of the transmission parameters by the changing unit results in an alteration of a signal diversity of one or more subsequent preambles as received by the base station at the later time.
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Specification