Channel access apparatus, systems, and methods
View Patent ↗An apparatus and a system, as well as a method and article, may operate to reserve access to one or more overlapping channels having a resource allocation (e.g., a frequency range) overlapping a resource allocation of at least two overlapped channels by reserving access to the overlapped channels. Reservation of the overlapped channels may occur in a substantially simultaneous, serial, or semi-serial fashion.
1. A method, including:
reserving, by a communications device, access to an overlapping channel by reserving a first overlapped channel for a particular time period and subsequently reserving a second overlapped channel for a remainder of the particular time period, wherein the overlapping channel has an allocated frequency bandwidth that completely overlaps frequency bandwidths allocated to the first and second overlapped channels;
wherein the first and second overlapped channels do not overlap each other in frequency;
wherein said reserving the second overlapped channel comprises transmitting a clear to send (CTS) message containing a duration value including a remaining duration of the particular time period;
wherein the first overlapped channel and the second overlapped channel each have a bandwidth of 20 MHz, and the overlapping channel has a bandwidth that is a multiple of 20 MHz.
2. The method of claim 1 , further including:
performing a backoff procedure before said transmitting the CTS.
3. The method of claim 2 , wherein the backoff procedure is performed according to an Institute of Electrical and Electronics Engineers 802.11 standard.
4. The method of claim 2 , wherein performing the backoff procedure occupies a time period selected from one of a random time period and a fixed time period.
5. The method of claim 4 , wherein the fixed time period includes a point coordination function interframe space (PIFS) time period.
6. The method of claim 1 , wherein said reserving the first and second overlapped channels further includes reserving access to the first and second overlapped channels in a preselected order.
7. The method of claim 6 , wherein the preselected order comprises an order according to frequency.
8. An article including a non-transitory machine-accessible medium having associated information, wherein the information, when accessed, results in a machine performing:
reserving access to an overlapping channel by reserving a first overlapped channel for a particular time period and subsequently reserving a second overlapped channel for a remainder of the particular time period, wherein the overlapping channel has an allocated frequency bandwidth that completely overlaps frequency bandwidths allocated to the first and second overlapped channels;
wherein the first and second overlapped channels do not overlap each other in frequency;
wherein said reserving the second overlapped channel comprises transmitting a clear to send (CTS) message containing a duration value including a remaining duration of the particular time period.
9. The article of claim 8 wherein the machine-accessible medium further includes information, which when accessed by the machine, results in the machine performing a backoff procedure before transmitting the CTS.
10. An apparatus, comprising
a communications device having a memory and at least one antenna, the communications device to reserve access to an overlapping channel by reserving a first overlapped channel for a particular time period and subsequently by reserving a second overlapped channel for a remainder of the particular time period, wherein the overlapping channel has an allocated frequency bandwidth that completely overlaps frequency bandwidths allocated to the first and second overlapped channels;
wherein the first and second overlapped channels do not overlap each other in frequency;
wherein said reserving the second overlapped channel comprises transmitting a clear to send (CTS) message containing a duration value including a remaining duration of the particular time period.
11. The apparatus of claim 1 , wherein the communications device is to perform a backoff procedure prior to transmitting the CTS message.
12. The apparatus of claim 2 , wherein the backoff procedure occupies a time period selected from one of a random time period and a fixed time period.