Short control signaling in unlicensed operation
There is disclosed a method of operating a radio node in a wireless communication network, the radio node being adapted for accessing a carrier for transmission based on a Clear Channel Assessment procedure, the method including transmitting Short Control Signaling on the carrier without a CCA procedure and/or with limited CCA procedure based on the fulfillment of one or more SCS criteria. The disclosure also pertains to related devices and methods.
1. A method of operating a radio node in a wireless communication network, the radio node being configured to access a carrier for transmission based on a Clear Channel Assessment (CCA) procedure, the method comprising:
transmitting Short Control Signaling (SCS) on the carrier with a limited CCA procedure based on the fulfillment of one or more SCS criteria, the limited CCA procedure being without a backoff; and
based on the one or more SCS criteria not being met, at least one of delaying an intended SCS transmission, the delaying including selecting a later transmission resource based on the SCS criteria, or performing the intended SCS transmission based on the limited CCA procedure.
2. A radio node for a wireless communication network, the radio node being configured to:
access a carrier for transmission based on a Clear Channel Assessment (CCA) procedure; and
transmit Short Control Signaling (SCS) on the carrier with a limited CCA procedure based on the fulfillment of one or more SCS criteria, the limited CCA procedure being without a backoff; and
based on the one or more SCS criteria not being met, at least one of delay an intended SCS transmission, the delaying including selecting a later transmission resource based on the SCS criteria, or perform the intended SCS transmission based on the limited CCA procedure.
3. The method according to claim 1 , wherein different SCS criteria apply to different transmission types of the SCS.
4. The method according to claim 1 , wherein the SCS criteria pertain to at least one of an observation period, a maximum total transmission time and a maximum single transmission duration.
5. The method according to claim 1 , wherein the SCS has one or more of transmission types of a set of transmission types comprising at least one of reference signaling, control signaling and data signaling.
6. The method according to claim 1 , wherein the SCS has one or more of a set of transmission types comprising at least one of a data channel, a control channel and a random access channel.
7. The method according to claim 1 , wherein the SCS criteria pertain to a sliding observation period.
8. A non-transitory computer storage medium storing executable program instructions that when executed cause processing circuitry to at least one of control and perform a method of operating a radio node in a wireless communication network, the radio node being configured to access a carrier for transmission based on a Clear Channel Assessment (CCA) procedure, the method comprising:
transmitting Short Control Signaling (SCS) on the carrier with a limited CCA procedure based on the fulfillment of one or more SCS criteria, the limited CCA procedure being without a backoff; and
based on the one or more SCS criteria not being met, at least one of delaying an intended SCS transmission, the delaying including selecting a later transmission resource based on the SCS criteria, or performing the intended SCS transmission based on the limited CCA procedure.
9. The radio node according to claim 2 , wherein different SCS criteria apply to different transmission types of the SCS.
10. The radio node according to claim 2 , wherein the SCS criteria pertain to an observation period, a maximum total transmission time and a maximum single transmission duration.
11. The radio node according to claim 2 , wherein the SCS has one or more of transmission types of a set of transmission types comprising at least one of reference signaling, control signaling and data signaling.
12. The radio node according to claim 2 , wherein the SCS has one or more of a set of transmission types comprising at least one of a data channel, a control channel and a random access channel.
13. The radio node according to claim 2 , wherein the SCS criteria pertain to a sliding observation period.
14. The method according to claim 3 , wherein the SCS criteria pertain to an observation period and/or a maximum total transmission time and/or a maximum single transmission duration.
15. The method according to claim 3 , wherein the SCS has one or more of transmission types of a set of transmission types comprising at least one of reference signaling, control signaling and data signaling.
16. The method according to claim 3 , wherein the SCS has one or more of a set of transmission types comprising at least one of a data channel, a control channel and a random access channel.
17. The method according to claim 3 , wherein the SCS criteria pertain to a sliding observation period.