US 2015/0189639 A1Published application

Preambles for sub-1ghz frequency bands

AssigneeMarvell World Trade Ltd.

InventorHongyuan Zhang

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Abstract

A preamble generator module generates a first preamble for a first packet, which is a single-user packet. The first preamble includes a first short training field, a first long training field, and a first signal field. The preamble generator module generates a second preamble for a second packet, which is a multi-user packet formatted as a multi-user packet or a single-user packet formatted as a multi-user packet. The second preamble is longer than the first preamble and includes a second short training field, a second long training field, and a second signal field. The first signal field and the second signal field conform to a Very High Throughput format specified in a wireless networking standard. A modulation module modulates the first signal field of the first preamble differently than the second signal field of the second preamble.

Claims22

Dependent claims

A system comprising:

a preamble generator module configured to
generate a first preamble for a first packet, wherein the first packet is a single-user packet, and wherein the first preamble includes (i) a first short training field, (ii) a first long training field, and (iii) a first signal field, wherein the first signal field conforms to a Very High Throughput format specified in a wireless networking standard;
generate a second preamble for a second packet, wherein the second preamble is longer than the first preamble, wherein the second packet is (i) a multi-user packet formatted as a multi-user packet or (ii) a single-user packet formatted as a multi-user packet, and wherein the second preamble includes (i) a second short training field, (ii) a second long training field, and (iii) a second signal field, wherein the second signal field conforms to the Very High Throughput format specified in the wireless networking standard;
and
a modulation module configured to modulate the first signal field of the first preamble differently than the second signal field of the second preamble.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/658,609Filed 16 Mar 2015
Priority: 16 May 2011
Published: 2 Jul 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H04W 72/044
Wireless resource allocation: based on the type of the allocated resource
H04L 1/0025
Characterised by the signalling: transmission of mode-switching indication
H04L 1/0028
Characterised by the signalling: formatting
H04L 1/0033
Systems modifying transmission characteristics according to link quality, e.g. power backoff: arrangements specific to the transmitter

Family

Application61/486,713Us provisional application · filed 16 May 2011
Application13/464,467Continuation · filed 4 May 2012
Application14/658,609Continuation
US 2012/0294294 A1Published application
US 8,982,889 B2Related patent
US 9,706,546 B2Related patent
US 2015/0189639 A1This patent

From the US filing history. Foreign family members aren’t listed.