Method of signaling the length of OFDM WLAN packets
First Claim
1. A system for wireless communication, comprising:
- a first communication device operable to transmit a message according to a new protocol having a header including a first rate field and a first length field, a header extension including a second rate field and a second length field, and a data field, such that when the message is received by a legacy communication device operable to receive a portion of the message according to a legacy protocol, the legacy communication device refrains from transmitting for a duration indicated by the combination of the first rate field and the first length field; and
a second communication device operable to receive the message according to the new protocol.
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Accused Products
Abstract
A system 100 for wireless communication is provided. The system 100 includes first communication device 110A operable to transmit a message 300 according to a new protocol. The new protocol having a header 302 including a first rate field and a first length field, a header extension 304 including a second rate field and a second length field, and a data 306. When the message 300 is received by a legacy communication device 102 which is operable to receive a portion of the message 300 according to a legacy protocol, the legacy communication device 102 refrains from transmitting for a duration indicated by the combination of the first rate field and the first length field. The system 100 also includes a second communication device 110B operable to receive the message 300 according to the new protocol. A method of communicating to maintain compatibility with legacy devices is also provided.
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Citations
20 Claims
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1. A system for wireless communication, comprising:
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a first communication device operable to transmit a message according to a new protocol having a header including a first rate field and a first length field, a header extension including a second rate field and a second length field, and a data field, such that when the message is received by a legacy communication device operable to receive a portion of the message according to a legacy protocol, the legacy communication device refrains from transmitting for a duration indicated by the combination of the first rate field and the first length field; and
a second communication device operable to receive the message according to the new protocol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system to enable improved wireless communication, the system comprising:
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a first communication device operable to wirelessly communicate via a first protocol, the first protocol comprising;
a header portion including a first rate field and a first length field operable to indicate a duration of a message, a header extension portion, including a second rate field and a second length field, wherein the second length field indicates the number of octets in a last symbol period of the message, and a data portion containing an information content of the message;
a second communication device operable to communicate via a second protocol, the second communication device operable in response to receiving the message communicated according to the first protocol to refrain from transmitting for a duration indicated by a combination of the first rate field and the first length field; and
a third communication device operable to wirelessly communicate via the first protocol and to reclaim one or more bits from one of the first length field and first rate field for signaling purposes. - View Dependent Claims (12, 13, 14)
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15. A method of communicating to maintain compatibility with legacy devices, comprising:
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creating a header extension containing a first rate field and a first length field of a message according to a first protocol;
creating a header containing a temporal length of the message according to a second protocol; and
sending the message including the header and the header extension to a first device operable to receive the message according to the first protocol and to a second device operable to receive at least a portion of the message according to the second protocol. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification