Frequency domain duplication in a long-range wireless local area network
First Claim
1. A method, in a communication device operating according to a communication protocol, for generating orthogonal frequency division multiplexing (OFDM) signals to be transmitted in a channel of a wireless communication network, wherein a set of two or more component channels is collectively coextensive with the channel, wherein the communication protocol defines (i) a non-duplicate mode data unit format corresponding to a channel bandwidth of a single component channel within the set of two or more component channels and (ii) a non-duplicate mode data unit format corresponding to a channel bandwidth of a first set of adjacent component channels within the set of two or more component channels, wherein the non-duplicate mode data unit format corresponding to the channel bandwidth of the single component channel has (i) a first number of lower-edge guard tones and (ii) a first number of upper-edge guard tones, wherein the non-duplicate mode data unit format corresponding to the channel bandwidth of the first set of adjacent component channels has (i) a second number of lower-edge guard tones and (ii) a second number of upper-edge guard tones, and wherein at least one of (i) the second number of lower-edge guard tones is greater than the first number of lower-edge guard tones or (ii) the second number of upper-edge guard tones is greater than the first number of upper-edge guard tones, the method comprising:
- determining, at the communication device, that a duplicate mode will be utilized for a first OFDM transmission in the first set of adjacent component channels; and
in response to determining that the duplicate mode will be utilized for the first OFDM transmission,generating, at the communication device, a first duplicate mode data unit corresponding to the first set of adjacent component channels, such that the first duplicate mode data unit has one or both of (i) less than the second number of lower-edge guard tones and (ii) less than the second number of upper-edge guard tones,wherein the first duplicate mode data unit includes, for each component channel in the first set of adjacent component channels, one duplicate, in frequency, of a component data unit having a bandwidth equal to the channel bandwidth of the single component channel.
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Accused Products
Abstract
A method for generating OFDM signals is implemented in a device operating according to a communication protocol. The protocol defines non-duplicate mode data units corresponding to single component channels of a BSS channel, and non-duplicate mode data units corresponding to sets of adjacent component channels. Non-duplicate mode data units corresponding to a set of component channels have more lower-edge and/or upper-edge guard tones than non-duplicate mode data units corresponding to single component channels. The method includes determining that a duplicate mode will be utilized for an OFDM transmission in the set of component channels and, in response, generating a duplicate mode data unit. The duplicate mode data unit has fewer lower-edge and/or upper-edge guard tones than a non-duplicate mode data unit corresponding to a set of component channels, and includes one duplicate of the non-duplicate mode data unit corresponding to the single component channel for each adjacent component channel.
32 Citations
22 Claims
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1. A method, in a communication device operating according to a communication protocol, for generating orthogonal frequency division multiplexing (OFDM) signals to be transmitted in a channel of a wireless communication network, wherein a set of two or more component channels is collectively coextensive with the channel, wherein the communication protocol defines (i) a non-duplicate mode data unit format corresponding to a channel bandwidth of a single component channel within the set of two or more component channels and (ii) a non-duplicate mode data unit format corresponding to a channel bandwidth of a first set of adjacent component channels within the set of two or more component channels, wherein the non-duplicate mode data unit format corresponding to the channel bandwidth of the single component channel has (i) a first number of lower-edge guard tones and (ii) a first number of upper-edge guard tones, wherein the non-duplicate mode data unit format corresponding to the channel bandwidth of the first set of adjacent component channels has (i) a second number of lower-edge guard tones and (ii) a second number of upper-edge guard tones, and wherein at least one of (i) the second number of lower-edge guard tones is greater than the first number of lower-edge guard tones or (ii) the second number of upper-edge guard tones is greater than the first number of upper-edge guard tones, the method comprising:
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determining, at the communication device, that a duplicate mode will be utilized for a first OFDM transmission in the first set of adjacent component channels; and in response to determining that the duplicate mode will be utilized for the first OFDM transmission, generating, at the communication device, a first duplicate mode data unit corresponding to the first set of adjacent component channels, such that the first duplicate mode data unit has one or both of (i) less than the second number of lower-edge guard tones and (ii) less than the second number of upper-edge guard tones, wherein the first duplicate mode data unit includes, for each component channel in the first set of adjacent component channels, one duplicate, in frequency, of a component data unit having a bandwidth equal to the channel bandwidth of the single component channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A communication device comprising:
a network interface device having one or more integrated circuits configured to operate according to a communication protocol, wherein the communication protocol defines (i) a non-duplicate mode data unit format corresponding to a channel bandwidth of a single component channel within a set of two or more component channels collectively coextensive with a composite channel, and (ii) a non-duplicate mode data unit format corresponding to a channel bandwidth of a set of adjacent component channels within the set of two or more component channels, the non-duplicate mode data unit format corresponding to bandwidth of the single component channel has (i) a first number of lower-edge guard tones and (ii) a first number of upper-edge guard tones, the non-duplicate mode data unit format corresponding to the bandwidth of the set of adjacent component channels has (i) a second number of lower-edge guard tones and (ii) a second number of upper-edge guard tones, and at least one of (i) the second number of lower-edge guard tones is greater than the first number of lower-edge guard tones or (ii) the second number of upper-edge guard tones is greater than the first number of upper-edge guard tones, determine that a duplicate mode will be utilized for an orthogonal frequency division multiplexing (OFDM) transmission in the set of adjacent component channels, and in response to determining that the duplicate mode will be utilized for the OFDM transmission, generate a duplicate mode data unit corresponding to the set of adjacent component channels, such that the duplicate mode data unit has one or both of (i) less than the second number of lower-edge guard tones and (ii) less than the second number of upper-edge guard tones, wherein the duplicate mode data unit includes, for each component channel in the set of adjacent component channels, one duplicate, in frequency, of a component data unit having a bandwidth equal to the channel bandwidth of the single component channel. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
Specification