Trigger frame format for orthogonal frequency division multiple access (ofdma) communication

Patent metadata

Field	Value
Publication number	US-2016165574-A1
Application number	US-201514961635-A
Country	US
Kind code	A1
Filing date	Dec 7, 2015
Priority date	Dec 5, 2014
Publication date	Jun 9, 2016
Grant date	—

Abstract

Multiple trigger frames are generated at a first communication device to trigger an uplink orthogonal frequency multiple access (OFDMA) transmission by multiple second communication devices. The multiple trigger frames include a broadcast trigger frame that includes information to indicate transmission parameters for a first subset of the second communication devices, and one or more unicast trigger frames, each of the one or more unicast trigger frame including information to indicate transmission parameters for a particular second communication device in a second subset of the second communication devices. The broadcast trigger frame is transmitted, in a first frequency portion of a downlink OFDMA transmission, to the first subset of the second communication devices, and respective unicast trigger frames are transmitted, in respective second frequency portions of the downlink OFDMA transmission, to the second subset of the second communication devices.

First claim

What is claimed is:

1 . A method for communicating in a wireless communication network, the method comprising:
generating, at a first communication device, multiple trigger frames to trigger an uplink orthogonal frequency multiple access (OFDMA) transmission by multiple second communication devices, including generating
(i) a broadcast trigger frame that includes information to indicate transmission parameters for a first subset of the second communication devices and
(ii) one or more unicast trigger frames, wherein each of the one or more unicast trigger frame includes information to indicate transmission parameters for a particular second communication device in a second subset of the second communication devices;
transmitting, with the first communication device, the multiple trigger frames to the multiple second communication devices, including
(i) transmitting the broadcast trigger frame to the first subset of the second communication devices, wherein the broadcast trigger frame is transmitted in a first frequency portion of a downlink OFDMA transmission to the multiple second communication devices, and
(ii) transmitting the unicast trigger frames to the second subset of the second communication devices, wherein respective unicast trigger frames are transmitted in respective second frequency portions of the downlink OFDMA transmission, the respective second frequency portions corresponding with the respective second communication devices in the second subset; and
receiving, at the first communication device, the triggered uplink OFDMA transmission, wherein the triggered uplink OFDMA transmission includes respective transmissions from the multiple second communication devices.

2 . The method of claim 1 , wherein:
respective frequency portions of the uplink OFDMA transmission correspond with respective second communication devices; generating the plurality of trigger frames further comprises including, in each of the trigger frames, indications of respective frequency portions corresponding with the respective second communication devices.

3 . The method of claim 2 , wherein each of the trigger frames includes (i) a common field to indicate common transmission information for the multiple second communication device and (ii) one or more per-device information fields that include respective transmission information for respective ones of the multiple second communication devices.

4 . The method of claim 3 , wherein the one or more per-device information fields include respective resource unit allocation indications that indicate the respective frequency portions corresponding with the respective second communication devices.

5 . The method of claim 4 , wherein a particular resource unit allocation indication, of the respective resource allocation indications, includes (i) a first portion that indicates a channel that includes at least an initial portion of a resource unit allocated to the corresponding second communication device and (ii) a second portion that indicates (a) a location, within the channel, of a beginning of the resource unit and (b) a width of the resource unit.

6 . The method of claim 3 , wherein a particular resource unit allocation indication, of the respective resource allocation indications, includes a value that maps to a particular resource unit from a set of allowed resource units.

7 . The method of claim 1 , wherein the downlink OFDMA transmission further includes data for second communication devices in the second subset of the multiple second communication devices.

8 . The method of claim 7 , wherein
data for a particular second communication device in the second set is transmitted to the particular second communication device in a particular second frequency portion of the downlink OFDMA transmission, and a unicast frame, of the multiple uncast frames, corresponding to the particular second communication device is transmitted to the particular second communication device in the particular second frequency portion of the downlink OFDMA transmission.

9 . The method of claim 7 , wherein the downlink OFDMA transmission does not include data for second communication devices in the first subset of the multiple second communication devices.

10 . The method of claim 1 , wherein
transmitting the broadcast trigger frame comprises including the broadcast trigger frame in a physical data unit, wherein the physical data unit includes a signal field, and wherein the signal field includes information to indicate that the data unit includes the broadcast trigger frame directed to multiple second communication devices.

11 . An apparatus, comprising:
a network interface device having one or more integrated circuits configured to
generate multiple trigger frames to trigger an uplink orthogonal frequency multiple access (OFDMA) transmission by multiple communication devices, wherein the multiple trigger frames include
(i) a broadcast trigger frame that includes information to indicate transmission parameters for a first subset of the multiple communication devices and
(ii) one or more unicast trigger frames, wherein each of the one or more unicast trigger frame includes information to indicate transmission parameters for a particular communication device in a second subset of the multiple communication devices;

transmit the broadcast trigger frame to the first subset of the multiple communication devices, wherein the broadcast trigger frame is transmitted in a first frequency portion of a downlink OFDMA transmission to the multiple communication devices, and
transmit the unicast trigger frames to the second subset of the multiple communication devices, wherein respective unicast trigger frames are transmitted in respective second frequency portions of the downlink OFDMA transmission, the respective second frequency portions corresponding with the respective one of the multiple communication devices in the second subset; and
receive the triggered uplink OFDMA transmission, wherein the triggered uplink OFDMA transmission includes respective transmissions from the multiple communication devices.

12 . The apparatus of claim 11 , wherein:
respective frequency portions of the uplink OFDMA transmission correspond with respective ones of the multiple communication devices; and the one or more integrated circuits are configured to include, in each of the trigger frames, indications of respective frequency portions corresponding with the respective ones of the multiple communication devices.

13 . The apparatus of claim 12 , wherein each of the trigger frames includes (i) a common field to indicate common transmission information for the multiple communication device and (ii) one or more per-device information fields that include respective transmission information for respective ones of the multiple communication devices.

14 . The apparatus of claim 13 , wherein the one or more per-device information fields include respective resource unit allocation indications that indicate the respective frequency portions corresponding with the respective ones of the multiple communication devices.

15 . The apparatus of claim 14 , wherein a particular resource unit allocation indication, of the respective resource allocation indications, includes (i) a first portion that indicates a channel that includes at least an initial portion of a resource unit allocated to the corresponding communication device of the multiple communication devices and (ii) a second portion that indicates (a) a location, within the channel, of a beginning of the resource unit and (b) a width of the resourc

Assignees

• Marvell World Trade Ltd

Inventors

• Chu Liwen
• Sun Yakun
• Zhang Hongyuan
• Wang Lei
• Jiang Jinjing
• Lou Hui-Ling

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W72/30

  Resource management for broadcast services · CPC title

• H04L5/0055

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title

• H04L5/0037

  Inter-user or inter-terminal allocation · CPC title

• H04W4/06

  Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services · CPC title