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US 2013/0258955 A1Published application
Modulation and coding schemes in sub-1 ghz networks
AssigneeQUALCOMM Incorporated
InventorsEugene J. Baik, Sameer Vermani
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Abstract
Systems and methods of controlling characteristics of messages in sub-1 GHz networks (e.g., IEEE 802.11ah networks) are disclosed. One or more data structures indicating available modulation and coding schemes (MCSs) may be stored at or accessible to transmitters and receivers. The data structures may be organized based on an MCS index, a frame format, a wireless network bandwidth, and/or the number of spatial streams in use at the wireless network. Information stored in the data structures may be used in generation and processing of messages communicated via the sub-1 GHz network.
Claims20
A non-transitory processor-readable medium storing:
- one or more data structures for use during communication via a sub-one gigahertz wireless network, the one or more data structures corresponding to one or more available bandwidths of the sub-one gigahertz wireless network and one or more available spatial streams of the sub-one gigahertz wireless network,
- wherein the one or more available bandwidths of the sub-one gigahertz wireless network include a one megahertz bandwidth, and
- wherein each data structure indicates, for each of a plurality of modulation and coding scheme (MCS) indexes:
- a modulation scheme of a packet that includes the MCS index;
- a coding rate to encode the packet;
- a number of bits per subcarrier symbol in the packet;
- a number of data symbols in the packet;
- and
- a number of pilot symbols in the packet.
6 more elements
A method comprising:
- selecting, at a transmitter, a modulation and coding scheme (MCS) from a plurality of MCSs available for use in communicating a packet via a sub-one gigahertz wireless network operating at a particular bandwidth while using a particular number of spatial streams, wherein the sub-one gigahertz wireless network supports operation at a bandwidth of one megahertz;
- determining at least one encoding characteristic based on an MCS index corresponding to the selected MCS;
- inserting the MCS index into the packet;
- encoding the packet based on the at least one encoding characteristic;
- and
- sending the encoded packet via the sub-one gigahertz wireless network to a receiver.
3 more elements
A method comprising:
- receiving, at a receiver, a packet sent via a sub-one gigahertz wireless network operating at a particular bandwidth while using a particular number of spatial streams, wherein the sub-one gigahertz wireless network supports operation a bandwidth of one megahertz;
- extracting a modulation and coding scheme (MCS) index from the received packet;
- identifying a data structure stored at the receiver, the data structure corresponding to the particular bandwidth and the particular number of spatial streams;
- determining, based on the extracted MCS index and the identified data structure, at least one encoding characteristic of the received packet;
- and
- decoding the received packet based on the at least one encoding characteristic.
3 more elements
An apparatus comprising:
- a memory storing one or more data structures, the one or more data structures corresponding to one or more available bandwidths of a sub-one gigahertz wireless network and one or more available spatial streams of the sub-one gigahertz wireless network, wherein the one or more available bandwidths of the sub-one gigahertz wireless network include a bandwidth of one megahertz, and wherein each data structure indicates, for each of a plurality of modulation and coding scheme (MCS) indexes, at least one encoding characteristic of a packet that includes the MCS index;
- and
- a processor coupled to the memory, the processor configured to:
- extract a first MCS index from a first packet received via the sub-one gigahertz wireless network operating at a first bandwidth while using a first number of spatial streams;
- and
- determine, based on a search of the first MCS index in a first data structure of the plurality of data structures that corresponds to the first bandwidth and the first number of spatial streams, at least one encoding characteristic of the received packet.
3 more elements
An apparatus comprising:
- means for storing one or more data structures, the one or more data structures corresponding to one or more available bandwidths of a sub-one gigahertz wireless network and one or more available spatial streams of the sub-one gigahertz wireless network, wherein the one or more available bandwidths of the sub-one gigahertz wireless network include a bandwidth of one megahertz, and wherein each data structure indicates, for each of a plurality of modulation and coding scheme (MCS) indexes, at least one encoding characteristic of a packet that includes the MCS index;
- and
- means for processing a packet based on a particular MCS index included in the packet.
Dependencies are inferred from the claim text.