Frame based channel access in wireless communication
A wireless device uses a frame-based channel access mode to access a wireless spectrum for wireless communication. The wireless device may use transmitter-side only channel sensing to determine whether or not the spectrum is idle. The frame-based channel access mode may use a fixed frame period that includes an initial sensing period for beam-based sensing and an idle period at the end of the frame to facilitate spectrum sharing.
1. A method of wireless communication operable at a transmitting device in a wireless network, comprising:
sensing a spectrum on a plurality of first beams following a first sequence of the plurality of first beams in a first frame of a plurality of frames, each of the plurality of frames comprising a sensing period for sensing the spectrum and an idle period for facilitating spectrum sharing with another wireless network and configured to forbid transmission of different beams;
selecting one or more beams of the plurality of first beams based on a result of sensing the spectrum in the sensing period of the first frame;
transmitting a signal in the first frame using the one or more beams in a time interval between the sensing period and the idle period of the first frame; and
sensing the spectrum on the plurality of first beams following a second sequence of the same plurality of first beams in a second frame of the plurality of frames, the second sequence being derived and different from the first sequence.
2. The method of claim 1 , further comprising:
sensing the spectrum on a plurality of second beams in a third frame of the plurality of frames, wherein the plurality of second beams comprise at least one beam outside of the plurality of first beams.
3. The method of claim 1 , further comprising:
determining the first sequence by randomly selecting a sensing order of the plurality of first beams in the first frame.
4. The method of claim 1 , further comprising:
deriving the second sequence from the first sequence based on a round-robin algorithm.
5. The method of claim 1 , wherein:
the sensing period comprises a plurality of sensing slots; and
the sensing the spectrum comprises sensing the spectrum using a different beam of the plurality of first beams in a different respective sensing slot of the plurality of sensing slots.
6. The method of claim 5 , further comprising:
transmitting one or more reservation messages in the plurality of sensing slots to reserve the one or more beams for communication in the first frame.
7. The method of claim 1 , further comprising:
refraining from transmitting a signal associated with a predetermined beam or beam group of the wireless network during the idle period.
8. The method of claim 7 , further comprising:
transmitting a signal using at least one different beam outside of the predetermined beam or beam group during the idle period.
9. The method of claim 1 , wherein the selecting the one or more beams comprises:
selecting the one or more beams without receiving a feedback on the one or more beams from another network node.
10. An apparatus for wireless communication, comprising:
a communication interface configured to access a spectrum of a wireless network;
a memory; and
a processor coupled with the communication interface and the memory,
wherein the processor and the memory are configured to:
sense the spectrum on a plurality of first beams following a first sequence of the plurality of first beams in a first frame of a plurality of frames, each of the plurality of frames comprising a sensing period for sensing the spectrum and an idle period for facilitating spectrum sharing with another wireless network and configured to forbid transmission of different beams;
select one or more beams of the plurality of first beams based on a result of sensing the spectrum in the sensing period of the first frame;
transmit a signal in the first frame using the one or more beams in a time interval between the sensing period and the idle period of the first frame; and
sense the spectrum on the plurality of first beams following a second sequence of the same plurality of first beams in a second frame of the plurality of frames, the second sequence being derived and different from the first sequence.
11. The apparatus of claim 10 , wherein the processor and the memory are further configured to:
sense the spectrum on a plurality of second beams in a third frame of the plurality of frames, wherein the plurality of second beams comprise at least one beam outside of the plurality of first beams.
12. The apparatus of claim 10 , wherein the processor and the memory are further configured to:
determine the first sequence by randomly selecting a sensing order of the plurality of first beams in the first frame.
13. The apparatus of claim 10 , wherein the processor and the memory are further configured to:
derive the second sequence from the first sequence based on a round-robin algorithm.
14. The apparatus of claim 10 , wherein the processor and the memory are further configured to:
sense the spectrum using a different beam of the plurality of first beams in a different respective sensing slot of a plurality of sensing slots in the sensing period.
15. The apparatus of claim 14 , wherein the processor and the memory are further configured to:
transmit one or more reservation messages in the plurality of sensing slots to reserve the one or more beams for communication in the first frame.
16. The apparatus of claim 10 , wherein the processor and the memory are further configured to:
refrain from transmitting a signal associated with a predetermined beam or beam group of the wireless network during the idle period.
17. The apparatus of claim 16 , wherein the processor and the memory are further configured to:
transmit a signal using at least one different beam outside of the predetermined beam or beam group during the idle period.
18. The apparatus of claim 10 , wherein the processor and the memory are further configured to:
select the one or more beams without receiving a feedback on the one or more beams from another network node.
19. A wireless device for wireless communication in a wireless network, comprising:
means for sensing a spectrum on a plurality of first beams following a first sequence of the plurality of first beams in a first frame of a plurality of frames, each of the plurality of frames comprising a sensing period for sensing the spectrum and an idle period for facilitating spectrum sharing with another wireless network and configured to forbid transmission of different beams;
means for selecting one or more beams of the plurality of first beams based on a result of sensing the spectrum in the sensing period of the first frame;
means for transmitting a signal in the first frame using the one or more beams in a time interval between the sensing period and the idle period of the first frame; and
means for sensing the spectrum on the plurality of first beams following a second sequence of the same plurality of first beams in a second frame of the plurality of frames, the second sequence being derived and different from the first sequence.
20. The wireless device of claim 19 , further comprising:
means for sensing the spectrum on a plurality of second beams in a third frame of the plurality of frames, wherein the plurality of second beams comprise at least one beam outside of the plurality of first beams.
21. The wireless device of claim 19 , further comprising:
means for determining the first sequence by randomly selecting a sensing order of the plurality of first beams in the first frame.
22. The wireless device of claim 19 , further comprising:
means for deriving the second sequence from the first sequence based on a round-robin algorithm.
23. The wireless device of claim 19 , wherein:
the sensing period comprises a plurality of sensing slots; and
the means for sensing the spectrum is configured to sense the spectrum using a different beam of the plurality of first beams in a different respective sensing slot of the plurality of sensing slots.
24. The wireless device of claim 23 , further comprising:
means for transmitting one or more reservation messages in the plurality of sensing slots to reserve the one or more beams for communication in the first frame.
25. The wireless device of claim 19 , further comprising:
means for refraining from transmitting a signal associated with a predetermined beam or beam group of the wireless network during the idle period; and
means for transmitting a signal using at least one different beam outside of the predetermined beam or beam group during the idle period.
26. The wireless device of claim 19 , wherein the means for selecting the one or more beams is configured to:
select the one or more beams without receiving a feedback on the one or more beams from another network node.
27. A non-transitory computer-readable medium storing computer-executable code at an apparatus for wireless communication, comprising instructions for causing the apparatus to:
sense a spectrum on a plurality of first beams following a first sequence of the plurality of first beams in a first frame of a plurality of frames, each of the plurality of frames comprising a sensing period for sensing the spectrum and an idle period for facilitating spectrum sharing with another wireless network and configured to forbid transmission of different beams;
select one or more beams of the plurality of first beams based on a result of sensing the spectrum in the sensing period of the first frame;
transmit a signal in the first frame using the one or more beams in a time interval between the sensing period and the idle period of the first frame; and
sense the spectrum on the plurality of first beams following a second sequence of the same plurality of first beams in a second frame of the plurality of frames, the second sequence being different from the first sequence.