Method for accessing channel under spatial multiplexing and station
The method includes: an intercepting station detecting a first radio signal of a third-party station and updating a local network allocation vector and/or response indication deferral; triggering a channel contention access procedure when determining that a second radio signal of the third-party station meets a spatial orthogonal condition, and then completing data transmission within updated time. In the case that the network allocation vector or response indication deferral is not 0, the third-party station ignoring or resetting the network allocation vector or the response indication deferral when determining that a sector transmission in a transmission initiated by the station is orthogonal with a transmission space to be carried out by itself, the third-party station initiating a contention and starting the spatial orthogonal transmission within a duration indicated by the updated network allocation vector or the response indication deferral.
1. A channel access method under spatial reuse, comprising:
an intercepting station detecting a first radio signal of a third-party station, updating a local network allocation vector and/or a response indication deferral;
triggering a channel contention access procedure when determining that a second radio signal of the third-party station meets a spatial orthogonal condition, and then completing a data transmission within a duration indicated after updating.
2. The channel access method of claim 1 , wherein, at the expiry of a timer indicated by the updated local network allocation vector or response indication deferral, the method further comprises: the intercepting station restoring a state of a random backoff procedure saved in a triggered channel contention access procedure as a current random backoff procedure.
3. The channel access method of claim 2 , wherein, said triggering a channel contention comprises: saving a state of an existing backoff procedure; starting a new backoff procedure and contending for a channel to transmit.
4. The channel access method of claim 2 , wherein, said determining that a second radio signal of a third-party station meets a spatial orthogonal condition is:
not detecting the second radio signal of the third-party station within a preset time interval Δt after an end of the intercepting station detecting the first radio signal of the third-party station.
5. The channel access method of claim 2 , wherein, the first radio signal is a radio signal of radio frames or a part of the radio frames that can be received by the intercepting station;
the second radio signal is a radio signal of radio frames or a part of the radio frames that cannot be received by the intercepting station.
6. The channel access method of claim 1 , wherein, the first radio signal is a radio signal of radio frames or a part of the radio frames that can be received by the intercepting station;
the second radio signal is a radio signal of radio frames or a part of the radio frames that cannot be received by the intercepting station.
7. The channel access method of claim 6 , wherein, the first radio signal is transmitted in an omnidirectional mode;
the second radio signal is transmitted in a directional or sectorization or beamforming mode.
8. The channel access method of claim 1 , wherein, said triggering a channel contention comprises: saving a state of an existing backoff procedure; starting a new backoff procedure and contending for a channel to transmit.
9. The channel access method of claim 1 , wherein, said determining that a second radio signal of a third-party station meets a spatial orthogonal condition is:
not detecting the second radio signal of the third-party station within a preset time interval Δt after an end of the intercepting station detecting the first radio signal of the third-party station.
10. The channel access method of claim 9 , wherein, the method further comprises: the intercepting station setting a channel carrier detection result as idle.
11. The channel access method of claim 9 , wherein, the preset time interval Δt starts at an omnidirectional beam to sector beam conversion time point;
the length of the preset time interval Δt is a duration of one or more transmission symbols; or, the length of the preset time interval Δt is the value of a summation of one short interframe space and one slot, plus the value of one receiving start delay.
12. The channel access method of claim 1 , wherein, when what is updated is the local network allocation vector, the duration indicated after updating is: a duration indicated by the updated local network allocation vector;
when what is updated is the response indication deferral, the duration indicated after updating is: a duration indicated by the updated response indication deferral;
when what is updated are the local network allocation vector and the response indication deferral, the duration indicated after updating is: the duration indicated by the updated local network allocation vector; or a longer one of durations indicated by the updated local network allocation vector and the updated response indication deferral.
13. A station, comprising hardware performing instructions stored in a non-transitory computer readable medium which executes steps in following modules: an updating modules, configured to, update a local network allocation vector and/or a response indication deferral when detecting a first radio signal of a third party station;
a triggering module, configured to, trigger a channel contention access procedure when determining that a second radio signal of a third-party station meets a spatial orthogonal condition, and then complete a data transmission within updated duration.
14. The station of claim 13 , wherein the hardware further performs instructions stored in a non-transitory computer readable medium which executes steps in following module:
a restoring module, configured to, at the expiry of a timer indicated by the updated local network allocation vector or response indication deferral,
restore a state of a random backoff procedure saved in a triggered channel contention transmission as a current random backoff procedure.
15. The station of claim 14 , wherein, the first radio signal is a radio signal of radio frames or a part of the radio frames that can be received by the station and is sent in an omnidirectional mode;
the second radio signal is a radio signal of radio frames or a part of the radio frames that cannot be received by the station and is sent in a directional or sectorization or beamforming mode.
16. The station of claim 13 , wherein, the first radio signal is a radio signal of radio frames or a part of the radio frames that can be received by the station and is sent in an omnidirectional mode;
the second radio signal is a radio signal of radio frames or a part of the radio frames that cannot be received by the station and is sent in a directional or sectorization or beamforming mode.
17. The station of claim 13 , wherein, said triggering a channel contention is saving a state of an existing backoff procedure; starting a new backoff procedure and contending for a channel to transmit.
18. The station of claim 13 , wherein, said determining that the second radio signal of the third-party station meets a spatial orthogonal condition is: not detecting the second radio signal of the third-party station within a preset time interval Δt after an end of the station detecting the first radio signal of the third-party station.
19. The station of claim 18 , wherein the hardware further performs instructions stored in a non-transitory computer readable medium which executes steps in following module:
a setting modul, configured to set a channel carrier detection result as idle.
20. The station of claim 18 , wherein, the preset time interval Δt starts at an omnidirectional beam to sector beam conversion time point;
the length of the preset time interval Δt is a duration of one or more transmission symbols; or, the length of the preset time interval Δt is the value of a summation of one short interframe space and one slot, plus the value of one receiving start delay.