Method for transmitting a synchronization signal block (SSB) based on a fixed frame period (FFP) by a communication device in a wireless communication system and apparatus using the same
AssigneeLG Electronics Inc.
InventorsSechang Myung, Seonwook Kim, Joonkui Ahn
Life of this patent
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Abstract
Provided is a synchronization signal block (SSB) transmission method performed by a communication device in a wireless communication system. The method is characterized in that: a time duration of a fixed frame period (FFP) is set for another communication device; and the SSB is periodically transmitted to the other communication device, wherein the SSB is periodically transmitted on each Nth FFP, said N being an integer greater than or equal to 1, and the transmission start time of the SSB is the first time resource included in each Nth FFP.
Claims14
A method for transmitting a downlink signal by a first communication device in a wireless communication system, the method comprising:
- setting a value of counter (N) as Ninit, where Ninit is a random number uniformly distributed between 0 and a value of contention window, wherein the value of contention window is based on a channel access priority class associated with a transmission of the first communication device;
- sensing a channel for an additional sensing slot duration;
- based on the additional sensing slot duration being idle, the N being larger than 0, and the first communication device choosing to decrement the counter, setting the N as N−1;
- transmitting, to a second communication device, a downlink control signal through the channel after the N is zero;
- configuring time duration of a Fixed Frame Period (FFP) for the second communication device;
- and
- transmitting a Synchronization Signal Block (SSB) to the second communication device periodically,
- wherein the FFP is a divisor of a period in which the SSB is transmitted,
- wherein the SSB is transmitted periodically on every N-th FFP, and the N is an integer larger than or equal to 1, and
- wherein a transmission start position of the SSB is a first time resource included in every N-th FFP.
A communication device, comprising:
- a transceiver transmitting and receiving a radio signal;
- and
- a processor operating by being combined with the transceiver, wherein the processor is configured to:
- set a value of counter (N) as Ninit, where Ninit is a random number uniformly distributed between 0 and a value of contention window, wherein the value of contention window is based on a channel access priority class associated with a transmission of the communication device;
- sense a channel for an additional sensing slot duration;
- based on the additional sensing slot duration being idle, the N being larger than 0, and the communication device choosing to decrement the counter, set the N as N−1;
- transmit, to a different communication device, a downlink control signal through the channel after the N is zero;
- configure time duration of a Fixed Frame Period (FFP) for the different communication device;
- and
- transmit a Synchronization Signal Block (SSB) to the different communication device periodically,
- wherein the FFP is a divisor of a period in which the SSB is transmitted,
- wherein the SSB is transmitted periodically on every N-th FFP, and the N is an integer larger than or equal to 1, and
- wherein a transmission start position of the SSB is a first time resource included in every N-th FFP.
Dependencies are inferred from the claim text.