Signaling different mcs sets for different bandwidths

Patent metadata

Field	Value
Publication number	US-2016065327-A1
Application number	US-201514832994-A
Country	US
Kind code	A1
Filing date	Aug 21, 2015
Priority date	Aug 27, 2014
Publication date	Mar 3, 2016
Grant date	—

Abstract

Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to using fields of a frame to indicate different modulation and coding scheme (MCS) sets for communications on a first bandwidth and on a second bandwidth.

First claim

What is claimed is:

1 . An apparatus for wireless communications, comprising:
a processing system configured to generate a frame having a first field that indicates a first modulation and coding scheme (MCS) set that the apparatus is capable of supporting for a first bandwidth and a second field that indicates a second modulation and coding scheme (MCS) set that the apparatus is capable of supporting for a second bandwidth, wherein different values of the second field indicate different MCS sets the apparatus is capable of supporting for the second bandwidth; and an interface configured to output the frame for transmission.

2 . The apparatus of claim 1 , wherein the first bandwidth comprises a bandwidth of 2 MHz or greater and the second bandwidth comprises a bandwidth of 1 MHz or less.

3 . The apparatus of claim 1 , wherein the different values of the second field indicate different numbers of spatial streams the apparatus is capable of supporting at the second bandwidth using the second MCS set.

4 . The apparatus of claim 1 , wherein at least one of the different values of the second field indicates a same number of spatial streams and MCS set as indicated by the first field.

5 . The apparatus of claim 1 , wherein at least one of the different values of the second field indicates that the apparatus is capable of supporting the second MCS set at the second bandwidth for a single spatial stream.

6 . The apparatus of claim 1 , wherein:
the different MCS sets indicated by the different values of the second field correspond to different MCS sets that the apparatus can indicate via different values of the first field.

7 . The apparatus of claim 1 , wherein the first MCS set comprises a MCS set that the apparatus is capable of supporting for a plurality of bandwidths including the first bandwidth.

8 . The apparatus of claim 1 , wherein the first MCS set comprises a MCS associated with different numbers of spatial streams.

9 . The apparatus of claim 1 , wherein:
the first field further indicates the apparatus is capable of supporting reception with the first MCS set for the first bandwidth and the second field further indicates the apparatus is capable of supporting reception with the second MCS set for the second bandwidth; and the frame further comprises a third field that indicates a third modulation and coding scheme (MCS) set that the apparatus is capable of supporting for transmission on the first bandwidth and a fourth field that indicates a fourth modulation and coding scheme (MCS) set that the apparatus is capable of supporting for transmission on the second bandwidth.

10 . An apparatus for wireless communications, comprising:
an interface for receiving a frame, from a wireless node, having a first field and a second field; and a processing system configured to determine, from a value of the first field, a first modulation and coding scheme (MCS) set the wireless node supports for a first bandwidth, to determine, from a value of the second field, a second MCS set the wireless node supports for a second bandwidth, and to configure the apparatus to communicate with the wireless node using at least one of:
the first bandwidth and a MCS in the first MCS set, or
the second bandwidth and a MCS in the second MCS set.

11 . The apparatus of claim 10 , wherein the first bandwidth comprises a bandwidth of 2 MHz or greater and the second bandwidth comprises a bandwidth of 1 MHz or less.

12 . The apparatus of claim 10 , wherein the processing system is configured to:
determine, from the value of the second field, a number of spatial streams the wireless node is capable of supporting for the second bandwidth using the second MCS set; and configure the apparatus to communicate with the wireless node using the second bandwidth, a MCS in the second MCS set, and the determined number of spatial streams.

13 . The apparatus of claim 10 , wherein the processing system is configured to:
determine, from the value of the second field, that the wireless node is capable of supporting for the second bandwidth a same number of spatial streams and MCS set as indicated by the first field; and configure the apparatus to communicate with the wireless node using the second bandwidth, a MCS in the first MCS set, and the determined number of spatial streams.

14 . The apparatus of claim 10 , wherein the processing system is configured to:
determine, from the value of the second field, that the wireless node is capable of supporting the second MCS set for the second bandwidth for a single spatial stream; and configure the apparatus to communicate with the wireless node using the second bandwidth, a MCS in the second MCS set, and a single spatial stream.

15 . The apparatus of claim 10 , wherein the processing system is configured to:
determine, from the value of the first field, that the wireless node is capable of supporting the first MCS set for a plurality of bandwidths including the first bandwidth; and configure the apparatus to communicate with the wireless node using one of the plurality of bandwidths and a MCS in the first MCS set.

16 . The apparatus of claim 10 , wherein the processing system is configured to:
determine, from the value of the first field, that the wireless node is capable of supporting a MCS in the first MCS set associated with different numbers of spatial streams; and configure the apparatus to communicate with the wireless node using the first bandwidth, a MCS in the first MCS set, and a number of spatial streams of the different numbers of spatial streams.

17 . The apparatus of claim 10 , wherein the processing system is configured to:
determine from the value of the first field that the wireless node is capable of supporting reception with the first MCS set using the first bandwidth; determine from the value of the second field that the wireless node is capable of supporting reception with the second MCS set using the second bandwidth; determine from a value of a third field that the wireless node is capable of supporting a third modulation and coding scheme (MCS) set for transmission using the first bandwidth; and determine from a value of a fourth field that the wireless node is capable of supporting a fourth modulation and coding scheme (MCS) set for transmission using the second bandwidth, wherein different values of the fourth field indicate different MCS sets the apparatus is capable of supporting for the second bandwidth.

18 . A method for wireless communications by an apparatus, comprising:
generating a frame having a first field that indicates a first modulation and coding scheme (MCS) set that the apparatus is capable of supporting for a first bandwidth and a second field that indicates a second modulation and coding scheme (MCS) set that the apparatus is capable of supporting for a second bandwidth, wherein different values of the second field indicate different MCS sets the apparatus is capable of supporting for the second bandwidth; and outputting the frame for transmission.

19 . The method of claim 18 , wherein the first bandwidth comprises a bandwidth of 2 MHz or greater and the second bandwidth comprises a bandwidth of 1 MHz or less.

20 . The method of claim 18 , wherein the different values of the second field indicate different numbers of spatial streams the apparatus is capable of supporting at the second bandwidth using the second MCS set.

21 . The method of claim 18 , wherein at least one of the different v

Assignees

• Qualcomm Inc

Inventors

• Asterjadhi Alfred

Classifications

• H04L1/0028 Primary

  Formatting · CPC title

• H04L1/0003 Primary

  by switching between different modulation schemes · CPC title

• H04L1/0009

  by adapting the channel coding (H04L1/1812 takes precedence) · CPC title