Access to random resource units by a plurality of BSSs
A physical AP manages a plurality of BSSs through VAPs. The AP sends a trigger frame to reserve a TXOP including resource units the nodes access to transmit data during the reserved TXOP. To improve channel utilization, the trigger frame identifies a plurality of groups, nodes of which are allowed to access the resources units to transmit data during the reserved TXOP. Thus, the AP receives, during the reserved TXOP, data from one node of a first group identified in the trigger frame and data from one node (separate from the first one) of a second and separate group identified in the trigger frame. A single access by the AP to the medium is thus required, reducing the channel occupation due to control frames. In some embodiments, the number of trigger frames can be drastically reduce, while offering resource units to several BSSs.
1. A communication apparatus comprising:
at least one memory that stores a set of instructions; and
at least one processor that executes the instructions, the instructions, when executed, causing the communication apparatus to perform operations comprising:
starting an act as a first access point managing a first basic service set, in which the first access point is identified by a first basic service set identifier,
starting an act as a second access point managing a second basic service set, in which the second access point is identified by a second basic service set identifier different from the first basic service set identifier,
transmitting a first trigger frame which triggers uplink multi user, MU, communication and includes first identification information for identifying that an address of a communication which is to be triggered is an address of the first access point,
receiving, from at least one station, STA, which has received the first trigger frame in response to the first trigger frame, a frame addressed to the first access point,
transmitting a second trigger frame which triggers the uplink MU communication and includes second identification information for identifying that an address of communication which is to be triggered is an address of the second access point; and
receiving, in response to the second trigger frame, from at least one STA which has received the second trigger frame, a frame directed to the second access point,
wherein the first basic service set identifier and the second basic service set identifier are 48-bit addresses, a most significant N bit of the first basic service set identifier is equal to a most significant N bit of the second basic service set identifier, and a least significant M bit of the first basic service set identifier is different from a least significant M bit of the second basic service set identifier, and
wherein a total of the most significant N bit and the least significant M bit is 48-bit.
2. The communication apparatus according to claim 1 , wherein a first Service Set Identifier which is a character string for identifying the first access point is different from a second Service Set Identifier which is a character string for identifying the second access point.
3. The communication apparatus according to claim 1 , wherein the operations further comprise controlling third identification information which is common to the first basic service set identifier and the second basic service set identifier.
4. The communication apparatus according to claim 3 , wherein the third identification information is further included in the first trigger frame and the second trigger frame.
5. The communication apparatus according to claim 1 , wherein the first trigger frame and the second trigger frame are trigger frames according to Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard.
6. The communication apparatus according to claim 5 , wherein the first trigger frame and the second trigger frame are trigger frames for reserving a transmission opportunity using an Orthogonal Frequency Division Multiple Access (OFDMA) transmission technique.
7. The communication apparatus according to claim 1 , wherein primary channels of the first access point identified based on the first basic service set identifier and the second access point identified based on the second basic service set identifier are common.
8. A communication method comprising, at a communication apparatus:
starting an act as a first access point managing a first basic service set, in which the first access point is identified by a first basic service set identifier,
starting an act as a second access point managing a second basic service set, in which the second access point is identified by a second basic service set identifier different from the first basic service set identifier,
transmitting a first trigger frame which triggers uplink multi user, MU, communication and includes first identification information for identifying that an address of communication which is to be triggered is an address of the first access point,
receiving, from at least one station, STA, which has received the first trigger frame in response to the first trigger frame, a frame addressed to the first access point,
transmitting a second trigger frame which triggers the uplink MU communication and includes second identification information for identifying that an address of communication which is to be triggered is an address of the second access point; and
receiving, in response to the second trigger frame, from at least one STA which has received the second trigger frame, a frame directed to the second access point,
wherein the first basic service set identifier and the second basic service set identifier are 48-bit addresses, a most significant N bit of the first basic service set identifier is equal to a most significant N bit of the second basic service set identifier, and a least significant M bit of the first basic service set identifier is different from a least significant M bit of the second basic service set identifier, and
wherein a total of the most significant N bit and the least significant M bit is 48-bit.
9. The communication method according to claim 8 , wherein a first Service Set Identifier which is a character string for identifying the first access point is different from a second Service Set Identifier which is a character string for identifying the second access point.
10. The communication method according to claim 8 , further comprising controlling third identification information which is common to the first basic service set identifier and the second basic service set identifier.
11. The communication method according to claim 10 , wherein the third identification information is further included in the first trigger frame and the second trigger frame.
12. A non-transitory computer-readable medium storing a program which, when executed by a microprocessor or computer system in a communication apparatus causes the communication apparatus to perform the following steps:
starting an act as a first access point managing a first basic service set, in which the first access point is identified by a first basic service set identifier,
starting an act as a second access point managing a second basic service set, in which the second access point is identified by a second basic service set identifier different from the first basic service set identifier,
transmitting a first trigger frame which triggers uplink multi user, MU, communication and includes first identification information for identifying that an address of communication which is to be triggered is an address of the first access point,
receiving, from at least one station, STA, which has received the first trigger frame in response to the first trigger frame, a frame addressed to the first access point,
transmitting a second trigger frame which triggers the uplink MU communication and includes second identification information for identifying that an address of a communication which is to be triggered is an address of the second access point; and
receiving, in response to the second trigger frame, from at least one STA which has received the second trigger frame, a frame directed to the second access point,
wherein the first basic service set identifier and the second basic service set identifier are 48-bit addresses, a most significant N bit of the first basic service set identifier is equal to a most significant N bit of the second basic service set identifier, and a least significant M bit of the first basic service set identifier is different from a least significant M bit of the second basic service set identifier, and
wherein a total of the most significant N bit and the least significant M bit is 48-bit.