Communication devices and communication methods for multi-band traffic streams
View Patent ↗Communication devices and methods for multi-band traffic streams are provided. One exemplary embodiment provides a multi-band communication device which includes at least a plurality of transceivers and Media Access Control (MAC) circuitry. In operation, the transceivers each transmit signal frames on different ones of a plurality of frequency bands. The MAC circuitry is coupled to the transceivers and, in operation, receives a multi-band block acknowledgement frame on one of the plurality of frequency bands acknowledging the signal frames transmitted on the plurality of frequency bands. Another exemplary embodiment provides MAC circuitry which in operation generates and transmits a multi-band block acknowledgement frame on one of the plurality of frequency bands acknowledging the signal frames received on the plurality of frequency bands.
1 . A multi-band transmitter device comprising:
control circuitry which, using a single frequency band, establishes a multi-band Block Ack agreement for a single Traffic Identifier (TID) between a transmitter's unified MAC address of the multi-band transmitter device and a recipient's unified MAC address of a multi-band recipient device, the multi-band Block Ack agreement being identified by the single TID, the recipient's unified MAC address, and the transmitter's unified MAC address;
a transmitter which, in operation, transmits to the multi-band recipient device, over a plurality of frequency bands, a plurality of MAC layer Protocol Data Units (MPDUs) belonging to the single TID;
wherein the transmitter, in operation, transmits a multi-band Block Ack request frame including a Multi-Band field that indicates a request for a Block Ack for multiple bands; and
a receiver which, based on the multi-band Block Ack agreement, receives on a first frequency band a multi-band block ack frame indicating reception statuses of the plurality of MPDUs transmitted over the plurality of frequency bands,
wherein the receiver, in operation, additionally receives a per-band block ack frame indicating a reception status of a subset of the plurality of MPDUs, the subset being transmitted on one frequency band among the plurality of frequency bands, and
wherein the per-band block ack frame is generated by the multi-band recipient device with partial state operation on each of the plurality of frequency bands.
2 . The multi-band transmitter device of claim 1 , wherein the multi-band Block Ack agreement is established for the single TID by exchanging an Add Block Ack (ADDBA) Request frame and an Add Block Ack (ADDBA) Response frame on an enabled frequency band.
3 . The multi-band transmitter device of claim 1 , wherein the plurality of MPDUs are transmitted on any of the plurality of frequency bands to which the single TID is mapped.
4 . The multi-band transmitter device of claim 1 , wherein, in response to receiving the multi-band block ack frame that indicates failure of reception of a first MPDU transmitted on the first frequency band, the transmitter retransmits the first MPDU on a second frequency band different from the first frequency band.
5 . The multi-band transmitter device of claim 1 , wherein the multi-band Block Ack request frame further includes one or more per-band information fields, each of the one or more per-band information fields comprising a TID field for indicating the single TID for which the multi-band block ack response is requested.
6 . The multi-band transmitter device of claim 1 , wherein a single reordering buffer is maintained for each set of the transmitter's unified MAC address of the multi-band transmitter device and the single TID.
7 . The multi-band transmitter device of claim 1 , wherein the control circuitry, in operation, using the single frequency band, performs a multi-band association setup for simultaneous communication on the plurality of frequency bands with the multi-band recipient device.
8 . The multi-band transmitter device of claim 1 , wherein
the control circuitry, in operation, consolidates the reception statuses of the subset and the reception statuses of the plurality of MPDUs to determine which of the plurality of MPDUs needs retransmission.
9 . A communication method for a multi-band transmitter device, the communication method comprising:
using a single frequency band, establishing a multi-band Block Ack agreement for a single Traffic identifier (TID) between a transmitter's unified MAC address of the multi-band transmitter device and a recipient's unified MAC address of a multi-band recipient device, the multi-band Block Ack agreement being identified by the single TID, the recipient's unified MAC address, and the transmitter's unified MAC address;
transmitting to the multi-band recipient device, over a plurality of frequency bands, a plurality of MAC layer Protocol Data Units (MPDUs) belonging to the single TID;
transmitting a multi-band Block Ack request frame including a Multi-Band field that indicates a request for a Block Ack for multiple bands;
based on the multi-band Block Ack agreement, receiving on a first frequency band a multi-band block ack frame indicating reception statuses of the plurality of MPDUs transmitted over the plurality of frequency bands; and
receiving a per-band block ack frame indicating a reception status of a subset of the plurality of MPDUs, the subset being transmitted on one frequency band among the plurality of frequency bands,
wherein the per-band block ack frame is generated by the multi-band recipient device with partial state operation on each of the plurality of frequency bands.
10 . The communication method of claim 9 , wherein the multi-band Block Ack agreement is established for the single TID by exchanging an Add Block Ack (ADDBA) Request frame and an Add Block Ack (ADDBA) Response frame on an enabled frequency band.
11 . The communication method of claim 9 , wherein the plurality of MPDUs are transmitted on any of the plurality of frequency bands to which the single TID is mapped.
12 . The communication method of claim 9 , comprising:
in response to receiving the multi-band block ack frame that indicates failure of reception of a first MPDU transmitted on the first frequency band, retransmitting the first MPDU on a second frequency band different from the first frequency band.
13 . The multi-band communication method of claim 9 , wherein:
the multi-band Block Ack request frame further includes one or more per-band information fields, each of the one or more per-band information fields comprising a TID field for indicating the single TID for which the multi-band block ack response is requested.
14 . The multi-band communication method of claim 9 , wherein a single reordering buffer is maintained for each set of the transmitter's unified MAC address of the multi-band transmitter device and the single TID.
15 . The multi-band communication method of claim 9 , comprising:
using the single frequency band, performing a multi-band association setup for simultaneous communication on the plurality of frequency bands with the multi-band recipient device.
16 . The multi-band communication method of claim 9 , comprising:
consolidating the reception statuses of the subset and the reception statuses of the plurality of MPDUs to determine which of the plurality of MPDUs needs retransmission.