Multi-user parallel channel access in WLAN systems
First Claim
1. A wireless transmit/receive unit (WTRU) that belongs to a multi-user parallel channel access (MU-PCA) group of a plurality of WTRUs, the MU-PCA group of the plurality of WTRUs is configured to communicate via a plurality of channels managed by an access point (AP), the WTRU comprising:
- a receiver configured to receive, from the access point (AP), over a channel of the plurality of channels that is associated with the WTRU, a group request-to-send (G-RTS) message inthcating that the AP is ready to transmit data, wherein the G-RTS is provided by the AP simultaneously over the plurality of channels to each of the plurality of WTRUs in the MU-PCA group;
a transmitter configured to transmit a first clear-to-send (CTS) message, to the AP, over the channel associated with the WTRU, indicating that the WTRU is ready to receive on the channel associated with the WTRU;
the receiver configured to receive a data message, from the AP, over the channel associated with the WTRU; and
the transmitter configured to transmit at least one frame, to the AP, over the channel associated with the WTRU, wherein the at least one frame includes an indication of uplink (UL) data that is one bit in length, and wherein the indication is set to a predetermined bit value on a conthtion that the WTRU has uplink (UL) data to transmit to the AP.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus may provide multi-user parallel channel access (MU-PCA) and/or single-user parallel channel access (SU-PCA) using transmit and/or receive with symmetrical bandwidth, in the downlink (DL), uplink (UL), or combined DL and UL. SU-PCA and MU-PCA may support unequal modulation and coding schemes (MCS) and unequal transmit power. Medium access control (MAC) layer, Physical layer (PHY), and mixed and PHY layer methods and procedures may support UL, DL and combined UL and DL SU-PCA and MU-PCA using transmit and/or receive with symmetrical bandwidth. MU-PCA and/or SU-PCA may also be supported by MAC and PHY layer designs and procedures for downlink, uplink and combined uplink and downlink using transmit/receive with asymmetrical bandwidth.
46 Citations
32 Claims
-
1. A wireless transmit/receive unit (WTRU) that belongs to a multi-user parallel channel access (MU-PCA) group of a plurality of WTRUs, the MU-PCA group of the plurality of WTRUs is configured to communicate via a plurality of channels managed by an access point (AP), the WTRU comprising:
-
a receiver configured to receive, from the access point (AP), over a channel of the plurality of channels that is associated with the WTRU, a group request-to-send (G-RTS) message inthcating that the AP is ready to transmit data, wherein the G-RTS is provided by the AP simultaneously over the plurality of channels to each of the plurality of WTRUs in the MU-PCA group; a transmitter configured to transmit a first clear-to-send (CTS) message, to the AP, over the channel associated with the WTRU, indicating that the WTRU is ready to receive on the channel associated with the WTRU; the receiver configured to receive a data message, from the AP, over the channel associated with the WTRU; and the transmitter configured to transmit at least one frame, to the AP, over the channel associated with the WTRU, wherein the at least one frame includes an indication of uplink (UL) data that is one bit in length, and wherein the indication is set to a predetermined bit value on a conthtion that the WTRU has uplink (UL) data to transmit to the AP. - View Dependent Claims (2, 3, 4, 5, 13, 14, 15, 22, 23, 24)
-
-
6. A method for use in a wireless transmit/receive unit (WTRU) that belongs to a multi-user parallel channel access (MU-PCA) group of a plurality of WTRUs, the MU-PCA group of the plurality of WTRUs is configured to communicate via a plurality of channels managed by an access point (AP), the method comprising:
-
receiving, from the access point (AP), over a channel of the plurality of channels that is associated with the WTRU, a group request-to-send (G-RTS) message indicating that the AP is ready to transmit data, wherein the G-RTS is provided by the AP simultaneously over the plurality of channels to each of the plurality of WTRUs in the MU-PCA; transmitting a first clear-to-send (CTS) message, to the AP, over the channel associated with the WTRU, indicating that the WTRU is ready to receive on the channel associated with the WTRU; receiving a data message, from the AP, over the channel associated with the WTRU; and transmitting at least one frame, to the AP, over the channel associated with the WTRU, wherein the at least one frame includes an indication of uplink (UL) data that is one bit in length, and wherein the indication is set to a predetermined bit value on a condition that the WTRU has uplink (UL) data to transmit to the AP. - View Dependent Claims (7, 8, 9, 10, 16, 17, 18, 25, 26, 27)
-
-
11. An access point (AP) that belongs to a multi-user parallel channel access (MU-PCA) group of a plurality of wireless transmit/receive units (WTRUs) and is configured to manage a plurality of channels within the MU-PCA group, the AP comprising:
-
a transmitter configured to transmit, to a WTRU, over a channel associated with the WTRU, a group request-to-send (G-RTS) message indicating that the AP is ready to transmit data, wherein transmitter simultaneously transmits the G-RTS over the plurality of channels to each of the plurality of WTRUs in the MU-PCA group; a receiver configured to receive a first clear-to-send (CTS) message, from the WTRU, over the channel associated with the WTRU, indicating that the WTRU is ready to receive on the channel associated with the WTRU; the transmitter configured to transmit data messages, to the WTRU, over the channel associated with the WTRU; and the receiver configured to receive at least one frame, from the WTRU, over the channel associated with the WTRU, wherein the at least one frame includes an indication of uplink (UL) data that is one bit in length, and wherein the indication is set to a predetermined bit value on a condition that the WTRU has uplink (UL) data to transmit to the AP. - View Dependent Claims (12, 19, 20, 21, 28, 29, 30, 31, 32)
-
Specification