SR Technologies, Inc.

A method for operating a mobile station (STA) to periodically change its medium access control (MAC) address includes transmitting, from a STA, a first capability indication to an access point (AP) indicating that the STA supports identifiable random MAC (IRM). The STA receives a second capability indication from the AP indicating that the AP supports IRM. A first IRM address (IRMA) is determined and a first association between the STA and the AP is established using the first IRMA. A determination is made whether to change a MAC address of the STA. In response to a determination to change the MAC address of the STA, without disconnecting from the AP, a second IRMA is determined and a second association between the STA and the AP is established using the first IRMA. During the second association, the second IRMA is transmitted from the STA to the AP.

A method for operating a mobile station (STA) to periodically change its medium access control (MAC) address includes transmitting, from a STA, a first capability indication to an access point (AP) indicating that the STA supports identifiable random MAC (IRM). The STA receives a second capability indication from the AP indicating that the AP supports IRM. A first IRM address (IRMA) is determined and a first association between the STA and the AP is established using the first IRMA. A determination is made whether to change a MAC address of the STA. In response to a determination to change the MAC address of the STA, without disconnecting from the AP, a second IRMA is determined and a second association between the STA and the AP is established using the first IRMA. During the second association, the second IRMA is transmitted from the STA to the AP.

A method for operating a mobile station (STA) to periodically change its medium access control (MAC) address includes transmitting, from a STA, a first capability indication to an access point (AP) indicating that the STA supports identifiable random MAC (IRM). The STA receives a second capability indication from the AP indicating that the AP supports IRM. A first IRM address (IRMA) is determined and a first association between the STA and the AP is established using the first IRMA. A determination is made whether to change a MAC address of the STA. In response to a determination to change the MAC address of the STA, without disconnecting from the AP, a second IRMA is determined and a second association between the STA and the AP is established using the first IRMA. During the second association, the second IRMA is transmitted from the STA to the AP.

A method for detection of an orthogonal frequency division multiplex (OFDM) packet preamble is described. The method includes quantizing a real part and an imaginary part of each complex template value to a template index value, determining a plurality of non-zero template index values based on the quantization, receiving a signal including a plurality of samples, performing a plurality of first sums, where each first sum sums a sample subset of plurality of sample subsets, and assigning the plurality of non-zero template index values to the plurality of first sums. The method further includes performing a transposition of each first sum using the assigned non-zero template index value, performing a second sum, where the second sum is a complex weighted sum of the transposition of each first sum, and determining that the received signal comprises the OFDM packet preamble based on the complex weighed sum.

A method in a mobile station (STA) configured to associate to an access point (AP) is described. The method includes determining an identifiable random medium access control (MAC) address (IRMA), associating to the AP and transmitting the IRMA to the AP during the association. The method also includes using the IRMA as the transmitter address (TA) a next time the STA begins to associate to the AP, where the IRMA is usable by the AP to identify the STA prior to a next association, determining a new IRMA, and transmitting the new IRMA to the AP during the next association. One or more additional associations to the AP are performed at least by transmitting at least a corresponding IRMA to the AP and indicating that the corresponding IRMA is a TA of the STA.

A method for detecting a preamble waveform of a received signal is described. The method includes dividing a correlation into a plurality of sub-correlations, for a plurality of frequency offset indices, k, covering a range of frequency offsets. The correlation has a correlation length equal to N, and a plurality of sub-correlations has a sub-correlations quantity equal to I, each sub-correlation of the plurality of sub-correlations has a sub-correlation length equal to M. A complex oscillation for a template frequency offset associated with k is approximated, the approximation is to be constant over an M-sample interval and is a piece-wise approximation. The approximated complex oscillation has length I. A quantity I of sub-correlations at each k is assembled using the approximated complex oscillation of length I. The method further includes determining that the received signal comprises the preamble based on the assembled sub-correlations and a correlation threshold.

A method for detection of an orthogonal frequency division multiplex (OFDM) packet preamble is described. The method includes quantizing a real part and an imaginary part of each complex template value to a template index value, determining a plurality of non-zero template index values based on the quantization, receiving a signal including a plurality of samples, performing a plurality of first sums, where each first sum sums a sample subset of plurality of sample subsets, and assigning the plurality of non-zero template index values to the plurality of first sums. The method further includes performing a transposition of each first sum using the assigned non-zero template index value, performing a second sum, where the second sum is a complex weighted sum of the transposition of each first sum, and determining that the received signal comprises the OFDM packet preamble based on the complex weighed sum.

A method in a mobile station (STA) configured to associate to an access point (AP) is described. The method includes determining an identifiable random medium access control (MAC) address (IRMA), associating to the AP and transmitting the IRMA to the AP during the association. The method also includes using the IRMA as the transmitter address (TA) a next time the STA begins to associate to the AP, where the IRMA is usable by the AP to identify the STA prior to a next association, determining a new IRMA, and transmitting the new IRMA to the AP during the next association. One or more additional associations to the AP are performed at least by transmitting at least a corresponding IRMA to the AP and indicating that the corresponding IRMA is a TA of the STA.

A method in a mobile station (STA) configured to associate to an access point (AP) is described. The method includes determining an identifiable random medium access control (MAC) address (IRMA), associating to the AP and transmitting the IRMA to the AP during the association. The method also includes using the IRMA as the transmitter address (TA) a next time the STA begins to associate to the AP, where the IRMA is usable by the AP to identify the STA prior to a next association, determining a new IRMA, and transmitting the new IRMA to the AP during the next association. One or more additional associations to the AP are performed at least by transmitting at least a corresponding IRMA to the AP and indicating that the corresponding IRMA is a TA of the STA.

A method for detecting a preamble waveform of a received signal is described. The method includes dividing a correlation into a plurality of sub-correlations, for a plurality of frequency offset indices, k, covering a range of frequency offsets. The correlation has a correlation length equal to N, and a plurality of sub-correlations has a sub-correlations quantity equal to I, each sub-correlation of the plurality of sub-correlations has a sub-correlation length equal to M. A complex oscillation for a template frequency offset associated with k is approximated, the approximation is to be constant over an M-sample interval and is a piece-wise approximation. The approximated complex oscillation has length I. A quantity I of sub-correlations at each k is assembled using the approximated complex oscillation of length I. The method further includes determining that the received signal comprises the preamble based on the assembled sub-correlations and a correlation threshold.