Frequency channel selection by an LTE-U wireless access point operating in the presence of other LTE-U and Wi-Fi access points
First Claim
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1. A method comprising:
- at a first protocol access point (AP) configured to operate wirelessly according to a first wireless protocol on any of multiple radio frequency (RF) channels in a frequency band associated with the first wireless protocol;
detecting on active ones of the multiple channels first wireless protocol APs operating according to the first wireless protocol and second wireless protocol APs operating according to a second wireless protocol;
determining AP channel statistics related to the detected APs, including a respective received signal strength indication (RSSI) for each detected AP and a respective time utilization indicative of a transmission time of each detected AP operating on the corresponding active channel;
for each active channel, determining a per-channel metric C_i based on the RSSIs and time utilizations for the detected APs operating on that active channel according to the equation C_i=f(U_1, . . . , U_N, R_1, . . . , R_N), where;
i designates an i'"'"'th active channel in which N APs are detected;
f denotes “
a function of”
;
U_n (n goes from 1, . . . , N) corresponds to the time utilization of detected AP n; and
R_n is the RSSI of the respective detected AP;
ranking the active channels according to the corresponding per-channel metrics; and
selecting a best channel on which to transmit in the frequency band from among the ranked active channels based on the ranking of the active channels.
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Abstract
A Long-Term Evolution-Unlicensed (LTE-U) access point (AP) is configured to operate wirelessly on any of multiple RF channels in an unlicensed frequency band. The AP detects other LTE-U APs and Wi-Fi APs operating on active ones of the multiple channels. The AP determines AP channel statistics for each detected AP. The AP determines, for each active channel, a per-channel metric based on the AP channel statistics. The AP ranks the active channels according to the corresponding per-channel metrics, and selects a best channel on which to transmit in the unlicensed frequency band from among the ranked active channels based on the rankings.
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Citations
29 Claims
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1. A method comprising:
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at a first protocol access point (AP) configured to operate wirelessly according to a first wireless protocol on any of multiple radio frequency (RF) channels in a frequency band associated with the first wireless protocol; detecting on active ones of the multiple channels first wireless protocol APs operating according to the first wireless protocol and second wireless protocol APs operating according to a second wireless protocol; determining AP channel statistics related to the detected APs, including a respective received signal strength indication (RSSI) for each detected AP and a respective time utilization indicative of a transmission time of each detected AP operating on the corresponding active channel; for each active channel, determining a per-channel metric C_i based on the RSSIs and time utilizations for the detected APs operating on that active channel according to the equation C_i=f(U_1, . . . , U_N, R_1, . . . , R_N), where; i designates an i'"'"'th active channel in which N APs are detected; f denotes “
a function of”
;U_n (n goes from 1, . . . , N) corresponds to the time utilization of detected AP n; and R_n is the RSSI of the respective detected AP; ranking the active channels according to the corresponding per-channel metrics; and selecting a best channel on which to transmit in the frequency band from among the ranked active channels based on the ranking of the active channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus comprising:
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a radio subsystem to operate wirelessly according to a first wireless protocol on any of multiple radio frequency (RF) channels in a frequency band associated with the first wireless protocol, and to receive wireless transmissions formatted according to a second wireless protocol; and a processor coupled to the radio subsystem, to; detect on active ones of the multiple channels first wireless protocol APs operating according to the first wireless protocol and second wireless protocol APs operating according to the second wireless protocol; determine AP channel statistics related to the detected APs, including a respective received signal strength indication (RSSI) for each detected AP and a respective time utilization indicative of a transmission time of each detected AP operating on the corresponding active channel; for each active channel, determine a per-channel metric C_i based on the RSSIs and time utilizations for the detected APs operating on that active channel according to the equation C_i=f(U_1, . . . , U_N, R_1, . . . , R_N), where; i designates an i'"'"'th active channel in which N APs are detected; f denotes “
a function of”
,U_n (n goes from 1, . . . , N) corresponds to the time utilization of detected AP n; and R_n is the RSSI of the respective detected AP; rank the active channels according to the corresponding per-channel metrics; and select a best channel on which to transmit in the frequency band from among the ranked active channels based on the ranking of the active channels. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A non-transitory computer readable storage media encoded with instructions that, when executed by a processor of an access point (AP) configured to operate wirelessly according to a first wireless protocol on any of multiple radio frequency (RF) channels in a frequency band associated with the first wireless protocol, cause the processor to:
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detect on active ones of the multiple channels first wireless protocol APs operating according to the first wireless protocol and second wireless protocol APs operating according to a second wireless protocol; determine AP channel statistics related to the detected APs, including a respective received signal strength indication (RSSI) for each detected AP and a respective time utilization indicative of a transmission time of each detected AP operating on the corresponding active channel; for each active channel, determine a per-channel metric C_i based on the RSSIs and time utilizations for the detected APs operating on that active channel according to the equation C_i=f(U_1, . . . , U_N, R_1, . . . , R_N), where; i designates an I'"'"'th active channel in which N APs are detected; f denotes “
a function of”
;U_n (n goes from 1, . . . , N) corresponds to the time utilization of detected AP n; and R_n is the RSSI of the respective detected AP; rank the active channels according to the corresponding per-channel metrics; and select a best channel on which to transmit in the frequency band from among the ranked active channels based on the ranking of the active channels. - View Dependent Claims (25, 26, 27, 28, 29)
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Specification