Source: https://patents.google.com/patent/US9392524B2/en
Timestamp: 2018-06-21 12:39:58
Document Index: 587659681

Matched Legal Cases: ['Application No. 61', 'Application No. 61', 'art 11', 'art 11', 'art 11', 'art 11', 'art 11', 'art 11']

US9392524B2 - Method and apparatus for providing very high throughput operation and capability signaling for wireless communications - Google Patents
US9392524B2
US9392524B2 US14733226 US201514733226A US9392524B2 US 9392524 B2 US9392524 B2 US 9392524B2 US 14733226 US14733226 US 14733226 US 201514733226 A US201514733226 A US 201514733226A US 9392524 B2 US9392524 B2 US 9392524B2
US14733226
US20150271732A1 (en )
This application is a continuation of U.S. patent application Ser. No. 14/197,703, filed Mar. 5, 2014, which issued as U.S. Pat. No. 9,055,510 on Jun. 9, 2015, and which is a continuation of U.S. patent application Ser. No. 12/945,278, filed Nov. 12, 2010, which issued as U.S. Pat. No. 8,711,820 on Apr. 29, 2014, which claims the benefit of U.S. Provisional Patent Application No. 61/260,552, filed Nov. 12, 2009, and U.S. Provisional Patent Application No. 61/260,639, filed Nov. 12, 2009, the contents of each of which are hereby incorporated by reference herein.
FIG. 2 shows an information element (IE) 160 in a medium access control (MAC) frame for the purpose of transferring information. A first field of the IE is an element identity (ID) field 165 that contains an ID specific to the IE. This is followed by a length field 170 that contains the length of the IE. The length field 170 is followed by a variable number of fields 175 1, 175 2, . . . , 175 n specific to the IE 160.
Information items Description
VHT Primary Channel Channel number of channel
considered as the primary channel (i.e.
common channel of operation for all
VHT devices in the VHT BSS) by the
VHT AP in the BSS.
Secondary Channel Depending on the bandwidth of
Offsets (relative to operation (20/40/80 MHz), there may
the VHT primary be one or more secondary channels for
channel) for one the VHT BSS operation. An example of
or more secondary the possible secondary channel
channels (for configurations and corresponding
20/40/80 MHz total values (note that the exact numerical
bandwidth) value may be chosen flexibly from the
currently unused values within the
range from 0 to 255) for the Secondary
Channel Offset field corresponding to
the VHT 80 MHz bandwidth
transmission, VHT 40 MHz bandwidth
transmission and VHT Multi-channel
transmission is shown in Table 2,
below. In one embodiment, the
modified Secondary Channel Offset
field which includes values for
secondary channel configurations
supporting VHT 80 MHz bandwidth
transmission may be included in: (1)
the beacon, probe response,
association response, and
reassociation response frames sent by
the AP or an WTRU in an Independent
BSS (2) a VHT Operation IE included
in frames sent by an AP or an WTRU
in an Independent BSS (3) Channel
Switch Announcement (Action) frame
sent by the AP or an WTRU in an
Independent BSS (4) a VHT
Capabilities IE included in frames
sent by an AP or an WTRU.
VHT WTRU channel The VHT BSS may support
widths that may be transmission in more than one
used to transmit to bandwidth for example 20/40/80 MHz.
RIFS mode support in Reduced inter frame space (RIFS)
VHT communication mode may be supported in the VHT
BSS to increase medium usage
Protection In VHT WLANs there need to be
requirements protection requirements for VHT
indication for transmissions to account for various
transmission of scenarios such as: (1) various
VHT packets bandwidths of operation (2) devices of
different capabilities etc.
Non-Greenfield VHT When VHT WTRUs that are not VHT-
WTRUs present Greenfield capable are present then
indication appropriate protection mechanisms
should be used for VHT transmissions
that use the VHT-Greenfield format.
Overlapping BSS When OBSS Non-VHT WTRUs are
(OBSS) Non-VHT present then VHT-Greenfield
WTRUs present transmissions should not be allowed in
indication the BSS.
Multiple Beacon Multiple beacons may be transmitted
transmission in a VHT BSS for example VHT space-
indication time block code (STBC) beacon in
addition to the regular beacon.
Multiple Multiple CTS protection may be used
clear-to-send (CTS) to set network allocation vector (NAV)
protection usage hen there exist VHT devices with
indication different physical layer
technologies, (e.g., STBC and non-
STBC), that need protection for their
VHT STBC Beacon Indication whether the beacon
indication containing this field is a VHT STBC
beacon or not.
Legacy Protection Indicates whether all the VHT WTRUs
Full Support in the BSS support legacy signal
in the VHT BSS protection mechanisms (e.g., L-SIG
transmission opportunity (TXOP)).
VHT phased Indicates whether VHT PCO (where
coexistence the VHT AP divides time between
operation 20/40/80 MHz bandwidth operation) is
(PCO) active active in the BSS.
VHT PCO Phase Indicates which VHT PCO phase is in
operation (e.g., 20/40/80 MHz phase).
Basic MCS Set Basic modulation and coding scheme
for VHT (MCS) set is the set of MCS values
that are supported by all VHT WTRUs
Power Control Indicates that the power control
for VHT in use mechanisms for VHT are in use in the
Indication of OFDMA may be employed in VHT
orthogonal WLAN by making channel/sub-carrier
frequency division assignments for traffic/users.
(OFDMA) in use
Indication of Frequency reuse mechanisms may be
frequency reuse employed to coexist with neighboring
mechanisms VHT APs/OBSSs An example is
increasing spectrum efficiency by
reusing some frequencies from the
frequency spectrum more often for
WTRUs closer to the AP. This may
alleviate the spectrum scarcity
problem in densely deployed VHT APs,
(i.e., interfering
neighboring/overlapping BSSs).
Indication of VHT WLANs will have to adopt
OBSS management Overlapping BSS coping mechanisms
to deal with the excessive channel
reuse and interference in scenarios
with densely deployed VHT APs.
Indication of VHT WLANs will need APs/WTRUs to
coexistence support parameters, rules, policies,
mechanisms mechanisms and regulatory
information for coexistence (e.g.,
inter-BSS, inter-system or television
white space (TVWS)).
0 Indicates that no secondary channel is present
(just 20 MHz).
1 Indicates that the secondary channel is above the
primary channel (for 40 MHz).
3 Indicates that the secondary channel is below the
primary channel (for 40 Hz).
Any unused Indicates 3 secondary channels immediately above
value from the primary channel (80 MHz bandwidth formed by
0 to 256 4 contiguous 20 MHz channels).
Any unused Indicates 3 secondary channels immediately below
Any unused Indicates 2 secondary channels immediately above
value from the primary channel and 1 secondary channel
0 to 256 immediately below the primary channel (80 MHz
(flexible) bandwidth formed by 4 contiguous 20 MHz channels).
Any unused Indicates 1 secondary channel immediately above
value from the primary channel and 2 secondary channels
Any unused Indicates configuration of positions of each of
value from the 3 secondary channels relative to the primary
0 to 256 channel where the 80 MHz bandwidth is not formed
(flexible) by 4 contiguous 20 MHz channels. Many such
configurations are possible and each may have a
Any unused Indicates configuration of the position of the
value from secondary channel relative to the primary channel
0 to 256 where a 40 MHz bandwidth is not formed by 2
(flexible) contiguous 20 MHz channels. Many such
Any unused Indicates configuration of secondary channels for
value from VHT Multi-channel transmission relative to the
0 to 256 primary channel. Many such configurations are
(flexible) possible and each may have a value associated
Remaining Not used.
FIG. 8 is a diagram of an example of VHT capabilities information exchange between a VHT AP or WTRU1 602 and a VHT WTRU2 600. The VHT WTRU2 600 sends an action request frame 604 containing VHT capabilities information to the VHT AP or WTRU1 602. The VHT AP or WTRU1 602 returns an ack frame 606, or optionally not in response to a broadcast or “action no ack” message. The VHT AP or WTRU1 602 responds with a management frame/action response frame 608 containing VHT capabilities information to the VHT WTRU2 600. The VHT WTRU2 600 may return an ack message 610 unless the message was a broadcast or action no ack message.
Coding capabilities Higher rate coding, coding algorithms
for VHT WLAN may be employed for VHT WLAN to
enhance performance such as
throughput and robustness.
Supported channel The VHT WLAN may support various
width set for VHT channel widths for eg. 20/40/80 MHz.
Transmission Multiple channels may be used
capabilities for simultaneously for communication, for
non-contiguous example, two 40 MHz channels that are
channels for not contiguous. An example of the
communication possible secondary channel
configurations and corresponding values
(note that the exact numerical value
may be chosen flexibly from the
transmission is shown in Table 2 above.
In one embodiment, the modified
Secondary Channel Offset field which
includes values for secondary channel
configurations supporting VHT 80 MHz
bandwidth transmission, VHT 40 MHz
bandwidth transmission and VHT
Multi-channel transmission may be
included in: (1) the beacon, probe
response, association response, and
BSS (2) a VHT Operation IE included in
frames sent by an AP or an WTRU in an
Independent BSS (3) Channel Switch
Announcement (Action) frame sent by
BSS (4) a VHT Capabilities IE included
in frames sent by an AP or an WTRU.
Reception Multiple channels may be used
channels for not contiguous. See also, notes above
communication regarding Transmission capabilities for
non-contiguous channels for
Transmission The multiple channels that are non-
capabilities for contiguous used for transmission
asynchronous simultaneously with data flow on the
communication over channels being asynchronous.
Reception The multiple channels that are non-
capabilities for contiguous may be used for transmission
Power Saving With various types of devices and
capabilities for applications on VHT WLANs there may
VHT WLAN be a need for suitable power saving
VHT Greenfield During Greenfield operation (i.e. no
capabilities legacy devices and only VHT devices
indicating being present) the packets may be
support for allowed to be transmitted in a
reception of Greenfield format (i.e. with efficient
packets with preambles designed for VHT packets).
VHT Greenfield
Short GI support The VHT WLAN may support 80 MHz
for reception of bandwidth transmissions with a short
packets Guard Interval in the Physical Layer.
a 80 MHz
Transmit VHT WLAN may use Space Time Block
Capabilities for Coding (STBC) mechanisms to increase
VHT STBC throughput.
Receive VHT WLAN may use STBC mechanisms
Capabilities to increase throughput.
for VHT STBC
Block Ack For VHT WLANs Block
Capabilities for Acknowledgement (Note: A Block Ack
VHT WLAN acknowledges the reception of a Block of
packets) mechanisms may be needed for
multi-user aggregation in the uplink;
multi-user aggregation in the downlink;
multi-user MIMO in the uplink; multi-
user MIMO in the downlink.
Maximum VHT WLANs may need to support
multi-user multi-user packet aggregation
aggregation mechanism to increase data throughput.
Indication of VH WLANs the BSS may allow (or not
use of allow) direct sequence spread spectrum
DSSS/CCK mode in (DSSS) and complementary code keying
a 80 MHz BSS (CCK) modes of operation in 80 MHz
operation BSS operation. An WTRU may (or may
not) use DSSS/CCK modes of operation
in 80 MHz.
80 MHz Intolerant A VHT WTRU may indicate this to
indication prevent the receiving VHT AP from
operating the BSS in 80 MHz mode.
40 MHz Intolerant A VHT WTRU may indicate this to
operating the BSS in 40 MHz mode.
20/80 MHz A VHT WTRU may indicate this to
Intolerant prevent the receiving VHT AP from
indication operating the BSS in 20/80 MHz mode.
20/40 MHz A VHT WTRU may indicate this to
indication operating the BSS in 20/40 MHz mode.
20/40/80 MHz A VHT WTRU may indicate this to
indication operating the BSS in 20/40/80 MHz
40/80 MHz A VHT WTRU may indicate this to
indication operating the BSS in 40/80 MHz mode.
Legacy Protection Legacy devices (i.e. based on 802.11
support in VHT standard prior to VHT WLAN) operation
WLAN may be supported using legacy signal
Packet Aggregation VHT devices may have different
parameters for capabilities to receive VHT packet
VHT WLAN aggregation such as: (1) maximum
length of a multiuser packet aggregation
and/or (2) minimum time separation
between aggregated packets for proper
Supported MCS set Higher MCSs (Modulation and Coding
for VHT WLAN Schemes) may be used in VHT WLANs
than in legacy systems for higher
Capabilities to MCSes may be used in VHT WLANs
provide VHT MCS which may require corresponding
Feedback for VHT feedback from receiver to transmitter.
Support for VHT VHT WLAN BSS may adopt a VHT
Phased Phased Coexistence Operation where
coexistence of the VHT AP may divide time between
20/40/80 MHz and 20/40/80 MHz bandwidth operation.
combinations of Note that all possible combinations may
these bandwidths be considered, for example,
20/40/80 GHz, 40/80 GHz, 20/80 MHz,
20/40 MHz. The AP may switch the BSS
operation amongst the chosen
bandwidths (i.e., 20/40/80 MHz phases)
for phased coexistence operation.
VHT PCO Transition Time duration for switching between
Time communication bandwidths, for
example, from 40 MHz to 80 MHz in PCO
VHT Control field May indicate support of the Very High
support Throughput Control field which may be
used for sending VHT Control
information and may be included in
data/control/management frames.
VHT Reverse The existing Reverse Direction protocol
Direction protocol (for an initiator device to grant a part
Responder of its transmit opportunity to a
capabilities responder device) may be extended for
VHT operation, for example, in a
Multi-user MIMO scenario. For example
in Downlink (AP to WTRU) MU-MIMO
where AP communicates with several
WTRUs at the same time, the AP may
grant Reverse Direction transmission
time to one or more of the WTRUs
following the AP transmission. This
grant of transmission time by the AP
will be within the transmit opportunity
(TXOP) duration that it has under its
VHT Transmit Transmit beamforming features for
Beamforming VHT WLAN may be needed for example
Capabilities/ in Multi-user MIMO operation.
VHT Antenna Antenna Selection features for VHT
Selection WLAN may be needed for example in
Capabilities/ Multi-user transmit/receive operation.
Power Control Power control may be needed in VHT
for VHT WLAN WLAN in many scenarios such as: (1)
capabilities/ Overlapping Basic Service Set (OBSS)
parameters interference reduction (2) Uplink
Multiuser MIMO. Since the WTRUs will
transmit simultaneously on the Uplink
MU-MIMO it will benefit the receiver if
the received power levels at the AP are
not too disparate so that all of the
WTRUs may be received with adequate
quality. In order to achieve this the
transmit power levels of the WTRUs
may have to be adjusted based on their
location and channel conditions.
Downlink Downlink Multi-user MIMO may be
Multi-user needed in VHT WLAN to increase
MIMO downlink throughput.
Uplink Uplink Multi-user MIMO may be needed
Multi-user in VHT WLAN to increase uplink
MIMO throughput.
Capabilities for The AP may process received ranging
Ranging signaling signaling from a WTRU to recommend to
for power the WTRU a transmit power
control adjustment, for example, in an uplink
Multiuser MIMO scenario.
for the WTRU a transmit timing offset
synchronization adjustment, for example, in an uplink
Multiuser MIMO scenario. Since the
WTRUs will transmit simultaneously on
the Uplink MU-MIMO it will benefit the
receiver if the received signals at the
AP are synchronized so that all of the
transmit times of the WTRUs may have
to be adjusted based on their location
Capabilities for OFDMA may be employed in VHT
OFDMA in VHT WLAN by performing channel/sub-
WLAN carrier assignments for traffic/users.
Capabilities for Frequency reuse mechanisms may be
mechanisms VHT APs/OBSSs An example may be
alleviate the spectrum scarcity problem
in densely deployed VHT APs (i.e.,
interfering Neighboring/Overlapping
BSSs).
Capabilities for Due to interference from Overlapping
Dynamic Frequency BSS or neighboring BSS VHT APs and
Selection VHT WTRUs may select frequencies for
operation in a dynamic way.
Capabilities for VHT APs and VHT WTRUs may switch
VHT Channel channels.
VHT Channel channels and bandwidths which may be
Switching and 20/40/80 MHz wide.
Capabilities for Link Adaptation mechanisms may be
VHT Link supported for VHT WLANs in scenarios
Adaptation such as: (1)Multi-channel transmission
(2) Multiuser MIMO.
Capabilities for VHT Channel State Information (CSI)
VHT Channel State feedback mechanisms may be supported
Information (CSI) for VHT WLANs in scenarios such as:
feedback (1)Multi-channel transmission (2)
Multiuser MIMO.
Capabilities for VHT Channel sounding mechanisms
VHT Channel may be supported for VHT WLANs in
sounding scenarios such as: (1)Multi-channel
transmission (2) Multiuser MIMO.
Capabilities for VHT WLANs may adopt Overlapping
OBSS management BSS coping mechanisms to deal with the
excessive channel reuse and
interference in scenarios with densely
deployed VHT APs.
Capabilities for VHT WLANs may need an AP/WTRU to
VHT Frequency be able to receive VHT frequency reuse
reuse information of neighboring BSSs and
mechanisms transmit VHT frequency reuse
information of its BSS.
Capabilities for VHT WLANs may need WTRUs/APs to
VHT Channel be able to scan the channels in the
Scanning spectrum to make measurements
according to specified VHT
information/parameters for channels
and channel bandwidths.
Capabilities for VHT WLANs may need APs/WTRUs to
mechanisms and regulatory information
for coexistence (for example, inter-BSS,
inter-system or Television White
Space(TVWS)). Some of the mechanism
may include sharing of information
amongst BSSs on channel usage.
a receiver configured to receive, from an access point (AP), a management frame comprising very high throughput (VHT) capabilities information, wherein the VHT capabilities information comprises:
an indication of whether reception via non-contiguous channels is supported,
an indication of a channel width, and
an indication of beamforming capabilities; and
a transmitter configured to transmit at least one data packet to the AP using multiple non-contiguous channels on a condition that reception via non-contiguous channels is supported.
2. The WTRU of claim 1, wherein the VHT capabilities information further comprises power control information.
3. The WTRU of claim 1, wherein the non-contiguous channels are used simultaneously.
4. The WTRU of claim 1, wherein at least one of the multiple non-contiguous channels is formed from a group of contiguous channels.
5. The WTRU of claim 1, wherein the VHT capabilities information further comprises an indication of link adaptation capabilities.
receiving a management frame comprising VHT capabilities information from an access point (AP), wherein the VHT capabilities information comprises:
transmitting at least one data packet to the AP via multiple non-contiguous channels, on a condition that reception via non-contiguous channels is supported.
7. The method of claim 6, wherein the VHT capabilities information further comprises power control information.
8. The method of claim 6, wherein the non-contiguous channels are used simultaneously.
9. The method of claim 6, wherein at least one of the multiple non-contiguous channels is formed from a group of contiguous channels.
10. The method of claim 6, wherein the VHT capabilities information further comprises an indication of link adaptation capabilities.
a transmitter configured to transmit a management frame comprising very high throughput (VHT) capabilities information to a wireless transmit/receive unit (WTRU), wherein the VHT capabilities information comprises:
a receiver configured to receive, via multiple non-contiguous channels, at least one data packet from the WTRU on a condition that reception via non-contiguous channels is supported.
12. The AP of claim 11, wherein the VHT capabilities information further comprises power control information.
13. The AP of claim 11, wherein the non-contiguous channels are used simultaneously.
14. The AP of claim 11, wherein at least one of the multiple non-contiguous channels is formed from a group of contiguous channels.
15. The AP of claim 11, wherein the VHT capabilities information further comprises an indication of link adaptation capabilities.
transmitting a management frame comprising very high throughput (VHT) capabilities information to a wireless transmit/receive unit (WTRU), wherein the VHT capabilities information comprises:
receiving at least one data packet from the WTRU via multiple non-contiguous channels, on a condition that reception via non-contiguous channels is supported.
17. The method of claim 16, wherein the VHT capabilities information further comprises power control information.
18. The method of claim 16, wherein the non-contiguous channels are used simultaneously.
19. The method of claim 16, wherein at least one of the multiple non-contiguous channels is formed from a group of contiguous channels.
20. The method of claim 16, wherein the VHT capabilities information further comprises an indication of link adaptation capabilities.
US14733226 2009-11-12 2015-06-08 Method and apparatus for providing very high throughput operation and capability signaling for wireless communications Active US9392524B2 (en)
US26055209 true 2009-11-12 2009-11-12
US26063909 true 2009-11-12 2009-11-12
US12945278 US8711820B2 (en) 2009-11-12 2010-11-12 Method and apparatus for providing very high throughput operation and capability signaling for wireless communications
US14197703 US9055510B2 (en) 2009-11-12 2014-03-05 Method and apparatus for providing very high throughput operation and capability signaling for wireless communications
US14733226 US9392524B2 (en) 2009-11-12 2015-06-08 Method and apparatus for providing very high throughput operation and capability signaling for wireless communications
US15207230 US9854498B2 (en) 2009-11-12 2016-07-11 Method and apparatus for providing very high throughput operation and capability signaling for wireless communications
US15835623 US20180103410A1 (en) 2009-11-12 2017-12-08 Method and apparatus for providing very high throughput operation and capability signaling for wireless communications
US14197703 Continuation US9055510B2 (en) 2009-11-12 2014-03-05 Method and apparatus for providing very high throughput operation and capability signaling for wireless communications
US15207230 Continuation US9854498B2 (en) 2009-11-12 2016-07-11 Method and apparatus for providing very high throughput operation and capability signaling for wireless communications
US20150271732A1 true US20150271732A1 (en) 2015-09-24
US9392524B2 true US9392524B2 (en) 2016-07-12
US12945278 Active US8711820B2 (en) 2009-11-12 2010-11-12 Method and apparatus for providing very high throughput operation and capability signaling for wireless communications
US14197703 Active US9055510B2 (en) 2009-11-12 2014-03-05 Method and apparatus for providing very high throughput operation and capability signaling for wireless communications
US14733226 Active US9392524B2 (en) 2009-11-12 2015-06-08 Method and apparatus for providing very high throughput operation and capability signaling for wireless communications
US15207230 Active US9854498B2 (en) 2009-11-12 2016-07-11 Method and apparatus for providing very high throughput operation and capability signaling for wireless communications
US15835623 Pending US20180103410A1 (en) 2009-11-12 2017-12-08 Method and apparatus for providing very high throughput operation and capability signaling for wireless communications
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