Method and device in communication node for wireless communication
The disclosure provides method and device in communication node for wireless communication. The communication node receives a first signaling and a first signal, and transmits a second signal; wherein the first signaling is used for determining a first offset; the first signal is used for determining a first measurement result; the second signal includes N second sub-signal(s), a first sequence is used for determining the N second sub-signal(s). In view of the problems that the method to determine repetitions of a preamble sequence is not applicable to a large-latency network and that multiple attempts of random access in a large-latency network will cause a larger latency, the disclosure provides an offset based scheme, in which the communication node introduces the first offset when determining the repetitions of a preamble sequence, thereby selecting an more appropriate number of repetitions, improving the successful probability of random access and reducing latency.
1 . A User Equipment (UE) for wireless communication, the UE comprising:
a receiver configured to:
receive information used to determine an offset for a Physical Random Access Channel (PRACH) transmission; and
receive a reference signal; and
a transmitter configured to transmit the PRACH transmission, wherein the PRACH transmission includes a preamble sequence transmitted N times, wherein N is an integer that is based on both the offset and a measurement of the reference signal;
wherein the receiver is further configured to begin to monitor for a candidate signal starting at a time that is based on a transmitting time of the PRACH transmission and ending at a time that is based on N.
2 . The UE of claim 1 , wherein the PRACH transmission initiates a random access procedure.
3 . The UE of claim 1 , wherein N is based on a summation of the measurement and the offset.
4 . The UE of claim 1 , wherein:
the receiver is further configured to receive a time-frequency resource set including a time-frequency resource; wherein the time-frequency resource is associated with N, is associated with the PRACH transmission, and is based on the measurement and the offset.
5 . The UE of claim 1 , wherein:
the receiver is further configured to receive a signaling that is used to determine a plurality of first-type offsets;
wherein:
any two of the plurality of first-type offsets are different; the offset is one of the plurality of first-type offsets; and a parameter, related to a base station that transmitted the reference signal, is used for selecting the offset from the plurality of first-type offsets.
6 . The UE of claim 1 , wherein the offset is related to a parameter of a transmitter of the reference signal.
7 . The UE of claim 1 , wherein the offset is related to a relationship between the UE and a base station that transmitted the reference signal.
8 . The UE of claim 1 , wherein each time the PRACH transmission is transmitted, a number of first transmission times increases by 1.
9 . The UE of claim 1 , wherein the UE does not monitor for the candidate signal in a time window; wherein a start of the time window is related to the transmitting time of the PRACH transmission; wherein a length of the time window is based on a parameter of a base station that transmitted the reference signal; and wherein the receiver is further configured to begin to monitor for the candidate signal at an end of the time window.
10 . The UE of claim 1 , wherein the offset is used to adjust a latency of communication between the UE and a base station.
11 . A method performed by a User Equipment (UE), the method comprising:
receiving information used to determine an offset for a Physical Random Access Channel (PRACH) transmission;
receiving a reference signal;
transmitting the PRACH transmission, wherein the PRACH transmission includes a preamble sequence transmitted N times, wherein N is an integer that is based on both the offset and a measurement of the reference signal; and
beginning to monitor for a candidate signal starting at a time that is based on a transmitting time of the PRACH transmission and ending at a time that is based on N.
12 . The method of claim 11 , wherein the PRACH transmission initiates a random access procedure.
13 . The method of claim 12 , wherein N is based on a summation of the measurement and the offset.
14 . The method of claim 11 , further comprising:
receiving a time-frequency resource set including a time-frequency resource; wherein the time-frequency resource is associated with N, is associated with the PRACH transmission, and is based on the measurement and the offset.
15 . The method of claim 11 , further comprising:
receiving a signaling that is used to determine a plurality of first-type offsets;
wherein:
any two of the plurality of first-type offsets are different; the offset is one of the plurality of first-type offsets; and a parameter, related to a base station that transmitted the reference signal, is used for selecting the offset from the plurality of first-type offsets.
16 . The method of claim 11 , wherein the offset is related to a parameter of a transmitter of the reference signal.
17 . The method of claim 11 , wherein the offset is related to a relationship between the UE and a base station that transmitted the reference signal.
18 . The method of claim 11 , wherein each time the PRACH transmission is transmitted, a number of first transmission times increases by 1.
19 . The method of claim 11 , wherein the UE does not monitor for the candidate signal in a time window; wherein a start of the time window is related to the transmitting time of the PRACH transmission; wherein a length of the time window is based on a parameter of a base station that transmitted the reference signal; and wherein the method further comprises beginning to monitor for the candidate signal at an end of the time window.
20 . A base station for wireless communication, the base station comprising:
a transmitter configured to:
transmit information used to determine an offset for a Physical Random Access Channel (PRACH) transmission; and
transmit a reference signal; and
a receiver configured to receive the PRACH transmission, wherein the PRACH transmission includes a preamble sequence transmitted N times, wherein N is an integer that is based on both the offset and a measurement of the reference signal;
wherein the transmitter is further configured to transmit a candidate signal starting at a time that is based on a receiving time of the PRACH transmission and ending at a time that is based on N.