Protection methods for wireless transmissions
DC CAFCFirst Claim
1. A method performed by a wireless device, the method comprising:
- receiving a Null Data Packet Announcement (NDPA), the NDPA including one or more station information fields;
determining exactly a number of the one or more station information fields in the NDPA;
receiving a Null Data Packet (NDP); and
in response to determining that the number of the one or more station information fields in the NDPA is one, transmitting first Channel State Information (CSI) feedback in response to receiving the NDP,wherein the number of the one or more station information fields in the NDPA is the cardinality of the one or more station information fields in the NDPA.
2 Assignments
Litigations
1 Petition
Accused Products
Abstract
A wireless device receives a Multi-User Request-To-Send (MU-RTS) frame, descrambles first scrambled data in the MU-RTS frame using a first scrambling sequence, generates second scrambled data using a second scrambling sequence, and transmits a Clear-to-Send (CTS) frame including the second scrambled data in response to receiving the MU-RTS frame. The second scrambling sequence is an N-bit left cyclic shift of the first scrambling sequence. Another wireless device generates first scrambled data using a first scrambling sequence and transmits an MU-RTS frame including the first scrambled data. The wireless device receives a CTS frame transmitted in response to the MU-RTS frame, and descrambles second scrambled data in the CTS frame using a second scrambling sequence. The second scrambling sequence is an N-bit left cyclic shift of the first scrambling sequence. In either device, N may be 7, and lengths of the first and second scrambling sequences may be 127 bits.
8 Citations
20 Claims
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1. A method performed by a wireless device, the method comprising:
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receiving a Null Data Packet Announcement (NDPA), the NDPA including one or more station information fields; determining exactly a number of the one or more station information fields in the NDPA; receiving a Null Data Packet (NDP); and in response to determining that the number of the one or more station information fields in the NDPA is one, transmitting first Channel State Information (CSI) feedback in response to receiving the NDP, wherein the number of the one or more station information fields in the NDPA is the cardinality of the one or more station information fields in the NDPA. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method performed by a wireless device, the method comprising:
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transmitting a Null Data Packet Announcement (NDPA), the NDPA including one or more station information fields; transmitting a Null Data Packet (NDP); and when a number of the one or more station information fields in the NDPA is one, receiving first Channel State Information (CSI) feedback transmitted in response to the NDP having only one station information field, wherein the number of the one or more station information fields in the NDPA is exactly the cardinality of the one or more station information fields in the NDPA. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification